initial commit

packages/woocommerce-admin/src/API/Coupons.php

@@ -0,0 +1,90 @@
+<?php
+/**
+ * REST API Coupons Controller
+ *
+ * Handles requests to /coupons/*
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Coupons controller.
+ *
+ * @extends WC_REST_Coupons_Controller
+ */
+class Coupons extends \WC_REST_Coupons_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params           = parent::get_collection_params();
+		$params['search'] = array(
+			'description'       => __( 'Limit results to coupons with codes matching a given string.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+
+
+	/**
+	 * Add coupon code searching to the WC API.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $request ) {
+		$args = parent::prepare_objects_query( $request );
+
+		if ( ! empty( $request['search'] ) ) {
+			$args['search'] = $request['search'];
+			$args['s']      = false;
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Get a collection of posts and add the code search option to WP_Query.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		add_filter( 'posts_where', array( __CLASS__, 'add_wp_query_search_code_filter' ), 10, 2 );
+		$response = parent::get_items( $request );
+		remove_filter( 'posts_where', array( __CLASS__, 'add_wp_query_search_code_filter' ), 10 );
+		return $response;
+	}
+
+	/**
+	 * Add code searching to the WP Query
+	 *
+	 * @param string $where Where clause used to search posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_search_code_filter( $where, $wp_query ) {
+		global $wpdb;
+
+		$search = $wp_query->get( 'search' );
+		if ( $search ) {
+			$code_like = '%' . $wpdb->esc_like( $search ) . '%';
+			$where    .= $wpdb->prepare( "AND {$wpdb->posts}.post_title LIKE %s", $code_like );
+		}
+
+		return $where;
+	}
+}

packages/woocommerce-admin/src/API/CustomAttributeTraits.php

@@ -0,0 +1,127 @@
+<?php
+/**
+ * Traits for handling custom product attributes and their terms.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * CustomAttributeTraits class.
+ */
+trait CustomAttributeTraits {
+	/**
+	 * Get a single attribute by its slug.
+	 *
+	 * @param string $slug The attribute slug.
+	 * @return WP_Error|object The matching attribute object or WP_Error if not found.
+	 */
+	public function get_custom_attribute_by_slug( $slug ) {
+		$matching_attributes = $this->get_custom_attributes( array( 'slug' => $slug ) );
+
+		if ( empty( $matching_attributes ) ) {
+			return new \WP_Error(
+				'woocommerce_rest_product_attribute_not_found',
+				__( 'No product attribute with that slug was found.', 'woocommerce' ),
+				array( 'status' => 404 )
+			);
+		}
+
+		foreach ( $matching_attributes as $attribute_key => $attribute_value ) {
+			return array( $attribute_key => $attribute_value );
+		}
+	}
+
+	/**
+	 * Query custom attributes by name or slug.
+	 *
+	 * @param string $args Search arguments, either name or slug.
+	 * @return array Matching attributes, formatted for response.
+	 */
+	protected function get_custom_attributes( $args ) {
+		global $wpdb;
+
+		$args = wp_parse_args(
+			$args,
+			array(
+				'name' => '',
+				'slug' => '',
+			)
+		);
+
+		if ( empty( $args['name'] ) && empty( $args['slug'] ) ) {
+			return array();
+		}
+
+		$mode = $args['name'] ? 'name' : 'slug';
+
+		if ( 'name' === $mode ) {
+			$name = $args['name'];
+			// Get as close as we can to matching the name property of custom attributes using SQL.
+			$like = '%"name";s:%:"%' . $wpdb->esc_like( $name ) . '%"%';
+		} else {
+			$slug = sanitize_title_for_query( $args['slug'] );
+			// Get as close as we can to matching the slug property of custom attributes using SQL.
+			$like = '%s:' . strlen( $slug ) . ':"' . $slug . '";a:6:{%';
+		}
+
+		// Find all serialized product attributes with names like the search string.
+		$query_results = $wpdb->get_results(
+			$wpdb->prepare(
+				"SELECT meta_value
+				FROM {$wpdb->postmeta}
+				WHERE meta_key = '_product_attributes'
+				AND meta_value LIKE %s
+				LIMIT 100",
+				$like
+			),
+			ARRAY_A
+		);
+
+		$custom_attributes = array();
+
+		foreach ( $query_results as $raw_product_attributes ) {
+
+			$meta_attributes = maybe_unserialize( $raw_product_attributes['meta_value'] );
+
+			if ( empty( $meta_attributes ) || ! is_array( $meta_attributes ) ) {
+				continue;
+			}
+
+			foreach ( $meta_attributes as $meta_attribute_key => $meta_attribute_value ) {
+				$meta_value = array_merge(
+					array(
+						'name'        => '',
+						'is_taxonomy' => 0,
+					),
+					(array) $meta_attribute_value
+				);
+
+				// Skip non-custom attributes.
+				if ( ! empty( $meta_value['is_taxonomy'] ) ) {
+					continue;
+				}
+
+				// Skip custom attributes that didn't match the query.
+				// (There can be any number of attributes in the meta value).
+				if ( ( 'name' === $mode ) && ( false === stripos( $meta_value['name'], $name ) ) ) {
+					continue;
+				}
+
+				if ( ( 'slug' === $mode ) && ( $meta_attribute_key !== $slug ) ) {
+					continue;
+				}
+
+				// Combine all values when there are multiple matching custom attributes.
+				if ( isset( $custom_attributes[ $meta_attribute_key ] ) ) {
+					$custom_attributes[ $meta_attribute_key ]['value'] .= ' ' . WC_DELIMITER . ' ' . $meta_value['value'];
+				} else {
+					$custom_attributes[ $meta_attribute_key ] = $meta_attribute_value;
+				}
+			}
+		}
+
+		return $custom_attributes;
+	}
+}

packages/woocommerce-admin/src/API/Customers.php

@@ -0,0 +1,88 @@
+<?php
+/**
+ * REST API Customers Controller
+ *
+ * Handles requests to /customers/*
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Customers controller.
+ *
+ * @extends \Automattic\WooCommerce\Admin\API\Reports\Customers\Controller
+ */
+class Customers extends \Automattic\WooCommerce\Admin\API\Reports\Customers\Controller {
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'customers';
+
+	/**
+	 * Register the routes for customers.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<id>[\d-]+)',
+			array(
+				'args'   => array(
+					'id' => array(
+						'description' => __( 'Unique ID for the resource.', 'woocommerce' ),
+						'type'        => 'integer',
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_item' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args              = parent::prepare_reports_query( $request );
+		$args['customers'] = $request['include'];
+		return $args;
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params            = parent::get_collection_params();
+		$params['include'] = $params['customers'];
+		unset( $params['customers'] );
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Data.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * REST API Data Controller
+ *
+ * Handles requests to /data
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Data controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class Data extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Return the list of data resources.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		$response         = parent::get_items( $request );
+		$response->data[] = $this->prepare_response_for_collection(
+			$this->prepare_item_for_response(
+				(object) array(
+					'slug'        => 'download-ips',
+					'description' => __( 'An endpoint used for searching download logs for a specific IP address.', 'woocommerce' ),
+				),
+				$request
+			)
+		);
+		return $response;
+	}
+}

packages/woocommerce-admin/src/API/DataCountries.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * REST API Data countries controller.
+ *
+ * Handles requests to the /data/countries endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Data countries controller class.
+ *
+ * @extends WC_REST_Data_Countries_Controller
+ */
+class DataCountries extends \WC_REST_Data_Countries_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+}

packages/woocommerce-admin/src/API/DataDownloadIPs.php

@@ -0,0 +1,166 @@
+<?php
+/**
+ * REST API Data Download IP Controller
+ *
+ * Handles requests to /data/download-ips
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Data Download IP controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class DataDownloadIPs extends \WC_REST_Data_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'data/download-ips';
+
+	/**
+	 * Register routes.
+	 *
+	 * @since 3.5.0
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Return the download IPs matching the passed parameters.
+	 *
+	 * @since  3.5.0
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		global $wpdb;
+
+		if ( isset( $request['match'] ) ) {
+			$downloads = $wpdb->get_results(
+				$wpdb->prepare(
+					"SELECT DISTINCT( user_ip_address ) FROM {$wpdb->prefix}wc_download_log
+					WHERE user_ip_address LIKE %s
+					LIMIT 10",
+					$request['match'] . '%'
+				)
+			);
+		} else {
+			return new \WP_Error( 'woocommerce_rest_data_download_ips_invalid_request', __( 'Invalid request. Please pass the match parameter.', 'woocommerce' ), array( 'status' => 400 ) );
+		}
+
+		$data = array();
+
+		if ( ! empty( $downloads ) ) {
+			foreach ( $downloads as $download ) {
+				$response = $this->prepare_item_for_response( $download, $request );
+				$data[]   = $this->prepare_response_for_collection( $response );
+			}
+		}
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Prepare the data object for response.
+	 *
+	 * @since  3.5.0
+	 * @param object          $item Data object.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response $response Response data.
+	 */
+	public function prepare_item_for_response( $item, $request ) {
+		$data     = $this->add_additional_fields_to_object( $item, $request );
+		$data     = $this->filter_response_by_context( $data, 'view' );
+		$response = rest_ensure_response( $data );
+
+		$response->add_links( $this->prepare_links( $item ) );
+
+		/**
+		 * Filter the list returned from the API.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param array            $item     The original item.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_data_download_ip', $response, $item, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param object $item Data object.
+	 * @return array Links for the given object.
+	 */
+	protected function prepare_links( $item ) {
+		$links = array(
+			'collection' => array(
+				'href' => rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ),
+			),
+		);
+		return $links;
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params            = array();
+		$params['context'] = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['match']   = array(
+			'description'       => __( 'A partial IP address can be passed and matching results will be returned.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+
+
+	/**
+	 * Get the schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'data_download_ips',
+			'type'       => 'object',
+			'properties' => array(
+				'user_ip_address' => array(
+					'type'        => 'string',
+					'description' => __( 'IP address.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+}

packages/woocommerce-admin/src/API/Features.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * REST API Features Controller
+ *
+ * Handles requests to /features
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Features\Features as FeaturesClass;
+
+/**
+ * Features Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class Features extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'features';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_features' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check whether a given request has permission to read onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Return available payment methods.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function get_features( $request ) {
+		return FeaturesClass::get_available_features();
+	}
+
+}

packages/woocommerce-admin/src/API/Init.php

@@ -0,0 +1,176 @@
+<?php
+/**
+ * REST API bootstrap.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+use Automattic\WooCommerce\Admin\Features\Features;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\Loader;
+
+/**
+ * Init class.
+ */
+class Init {
+	/**
+	 * The single instance of the class.
+	 *
+	 * @var object
+	 */
+	protected static $instance = null;
+
+	/**
+	 * Get class instance.
+	 *
+	 * @return object Instance.
+	 */
+	final public static function instance() {
+		if ( null === static::$instance ) {
+			static::$instance = new static();
+		}
+		return static::$instance;
+	}
+
+	/**
+	 * Boostrap REST API.
+	 */
+	public function __construct() {
+		// Hook in data stores.
+		add_filter( 'woocommerce_data_stores', array( __CLASS__, 'add_data_stores' ) );
+		// REST API extensions init.
+		add_action( 'rest_api_init', array( $this, 'rest_api_init' ) );
+
+		// Add currency symbol to orders endpoint response.
+		add_filter( 'woocommerce_rest_prepare_shop_order_object', array( __CLASS__, 'add_currency_symbol_to_order_response' ) );
+	}
+
+	/**
+	 * Init REST API.
+	 */
+	public function rest_api_init() {
+		$controllers = array(
+			'Automattic\WooCommerce\Admin\API\Features',
+			'Automattic\WooCommerce\Admin\API\Notes',
+			'Automattic\WooCommerce\Admin\API\NoteActions',
+			'Automattic\WooCommerce\Admin\API\Coupons',
+			'Automattic\WooCommerce\Admin\API\Data',
+			'Automattic\WooCommerce\Admin\API\DataCountries',
+			'Automattic\WooCommerce\Admin\API\DataDownloadIPs',
+			'Automattic\WooCommerce\Admin\API\Marketing',
+			'Automattic\WooCommerce\Admin\API\MarketingOverview',
+			'Automattic\WooCommerce\Admin\API\Options',
+			'Automattic\WooCommerce\Admin\API\Orders',
+			'Automattic\WooCommerce\Admin\API\Products',
+			'Automattic\WooCommerce\Admin\API\ProductAttributes',
+			'Automattic\WooCommerce\Admin\API\ProductAttributeTerms',
+			'Automattic\WooCommerce\Admin\API\ProductCategories',
+			'Automattic\WooCommerce\Admin\API\ProductVariations',
+			'Automattic\WooCommerce\Admin\API\ProductReviews',
+			'Automattic\WooCommerce\Admin\API\ProductVariations',
+			'Automattic\WooCommerce\Admin\API\ProductsLowInStock',
+			'Automattic\WooCommerce\Admin\API\SettingOptions',
+			'Automattic\WooCommerce\Admin\API\Themes',
+			'Automattic\WooCommerce\Admin\API\Plugins',
+			'Automattic\WooCommerce\Admin\API\OnboardingFreeExtensions',
+			'Automattic\WooCommerce\Admin\API\OnboardingPayments',
+			'Automattic\WooCommerce\Admin\API\OnboardingProductTypes',
+			'Automattic\WooCommerce\Admin\API\OnboardingProfile',
+			'Automattic\WooCommerce\Admin\API\OnboardingTasks',
+			'Automattic\WooCommerce\Admin\API\OnboardingThemes',
+			'Automattic\WooCommerce\Admin\API\NavigationFavorites',
+			'Automattic\WooCommerce\Admin\API\Taxes',
+		);
+
+		if ( Features::is_enabled( 'analytics' ) ) {
+			$analytics_controllers = array(
+				'Automattic\WooCommerce\Admin\API\Customers',
+				'Automattic\WooCommerce\Admin\API\Leaderboards',
+				'Automattic\WooCommerce\Admin\API\Reports\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Import\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Export\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Products\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Variations\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Products\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Variations\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Revenue\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Orders\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Orders\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Categories\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Taxes\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Coupons\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Coupons\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Stock\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Stock\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Downloads\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Downloads\Stats\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Customers\Controller',
+				'Automattic\WooCommerce\Admin\API\Reports\Customers\Stats\Controller',
+			);
+
+			// The performance indicators controller must be registered last, after other /stats endpoints have been registered.
+			$analytics_controllers[] = 'Automattic\WooCommerce\Admin\API\Reports\PerformanceIndicators\Controller';
+
+			$controllers = array_merge( $controllers, $analytics_controllers );
+		}
+
+		$controllers = apply_filters( 'woocommerce_admin_rest_controllers', $controllers );
+
+		foreach ( $controllers as $controller ) {
+			$this->$controller = new $controller();
+			$this->$controller->register_routes();
+		}
+	}
+
+	/**
+	 * Adds data stores.
+	 *
+	 * @param array $data_stores List of data stores.
+	 * @return array
+	 */
+	public static function add_data_stores( $data_stores ) {
+		return array_merge(
+			$data_stores,
+			array(
+				'report-revenue-stats'    => 'Automattic\WooCommerce\Admin\API\Reports\Orders\Stats\DataStore',
+				'report-orders'           => 'Automattic\WooCommerce\Admin\API\Reports\Orders\DataStore',
+				'report-orders-stats'     => 'Automattic\WooCommerce\Admin\API\Reports\Orders\Stats\DataStore',
+				'report-products'         => 'Automattic\WooCommerce\Admin\API\Reports\Products\DataStore',
+				'report-variations'       => 'Automattic\WooCommerce\Admin\API\Reports\Variations\DataStore',
+				'report-products-stats'   => 'Automattic\WooCommerce\Admin\API\Reports\Products\Stats\DataStore',
+				'report-variations-stats' => 'Automattic\WooCommerce\Admin\API\Reports\Variations\Stats\DataStore',
+				'report-categories'       => 'Automattic\WooCommerce\Admin\API\Reports\Categories\DataStore',
+				'report-taxes'            => 'Automattic\WooCommerce\Admin\API\Reports\Taxes\DataStore',
+				'report-taxes-stats'      => 'Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats\DataStore',
+				'report-coupons'          => 'Automattic\WooCommerce\Admin\API\Reports\Coupons\DataStore',
+				'report-coupons-stats'    => 'Automattic\WooCommerce\Admin\API\Reports\Coupons\Stats\DataStore',
+				'report-downloads'        => 'Automattic\WooCommerce\Admin\API\Reports\Downloads\DataStore',
+				'report-downloads-stats'  => 'Automattic\WooCommerce\Admin\API\Reports\Downloads\Stats\DataStore',
+				'admin-note'              => 'Automattic\WooCommerce\Admin\Notes\DataStore',
+				'report-customers'        => 'Automattic\WooCommerce\Admin\API\Reports\Customers\DataStore',
+				'report-customers-stats'  => 'Automattic\WooCommerce\Admin\API\Reports\Customers\Stats\DataStore',
+				'report-stock-stats'      => 'Automattic\WooCommerce\Admin\API\Reports\Stock\Stats\DataStore',
+			)
+		);
+	}
+
+	/**
+	 * Add the currency symbol (in addition to currency code) to each Order
+	 * object in REST API responses. For use in formatAmount().
+	 *
+	 * @param {WP_REST_Response} $response REST response object.
+	 * @returns {WP_REST_Response}
+	 */
+	public static function add_currency_symbol_to_order_response( $response ) {
+		$response_data                    = $response->get_data();
+		$currency_code                    = $response_data['currency'];
+		$currency_symbol                  = get_woocommerce_currency_symbol( $currency_code );
+		$response_data['currency_symbol'] = html_entity_decode( $currency_symbol );
+		$response->set_data( $response_data );
+
+		return $response;
+	}
+}

packages/woocommerce-admin/src/API/Leaderboards.php

@@ -0,0 +1,562 @@
+<?php
+/**
+ * REST API Leaderboards Controller
+ *
+ * Handles requests to /leaderboards
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Categories\DataStore as CategoriesDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\Coupons\DataStore as CouponsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\Customers\DataStore as CustomersDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\Products\DataStore as ProductsDataStore;
+
+/**
+ * Leaderboards controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class Leaderboards extends \WC_REST_Data_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'leaderboards';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/allowed',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_allowed_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_allowed_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Get the data for the coupons leaderboard.
+	 *
+	 * @param int    $per_page Number of rows.
+	 * @param string $after Items after date.
+	 * @param string $before Items before date.
+	 * @param string $persisted_query URL query string.
+	 */
+	public function get_coupons_leaderboard( $per_page, $after, $before, $persisted_query ) {
+		$coupons_data_store = new CouponsDataStore();
+		$coupons_data       = $per_page > 0 ? $coupons_data_store->get_data(
+			apply_filters(
+				'woocommerce_analytics_coupons_query_args',
+				array(
+					'orderby'       => 'orders_count',
+					'order'         => 'desc',
+					'after'         => $after,
+					'before'        => $before,
+					'per_page'      => $per_page,
+					'extended_info' => true,
+				)
+			)
+		)->data : array();
+
+		$rows = array();
+		foreach ( $coupons_data as $coupon ) {
+			$url_query   = wp_parse_args(
+				array(
+					'filter'  => 'single_coupon',
+					'coupons' => $coupon['coupon_id'],
+				),
+				$persisted_query
+			);
+			$coupon_url  = wc_admin_url( '/analytics/coupons', $url_query );
+			$coupon_code = isset( $coupon['extended_info'] ) && isset( $coupon['extended_info']['code'] ) ? $coupon['extended_info']['code'] : '';
+			$rows[]      = array(
+				array(
+					'display' => "<a href='{$coupon_url}'>{$coupon_code}</a>",
+					'value'   => $coupon_code,
+				),
+				array(
+					'display' => wc_admin_number_format( $coupon['orders_count'] ),
+					'value'   => $coupon['orders_count'],
+				),
+				array(
+					'display' => wc_price( $coupon['amount'] ),
+					'value'   => $coupon['amount'],
+				),
+			);
+		}
+
+		return array(
+			'id'      => 'coupons',
+			'label'   => __( 'Top Coupons - Number of Orders', 'woocommerce' ),
+			'headers' => array(
+				array(
+					'label' => __( 'Coupon code', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Orders', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Amount discounted', 'woocommerce' ),
+				),
+			),
+			'rows'    => $rows,
+		);
+	}
+
+	/**
+	 * Get the data for the categories leaderboard.
+	 *
+	 * @param int    $per_page Number of rows.
+	 * @param string $after Items after date.
+	 * @param string $before Items before date.
+	 * @param string $persisted_query URL query string.
+	 */
+	public function get_categories_leaderboard( $per_page, $after, $before, $persisted_query ) {
+		$categories_data_store = new CategoriesDataStore();
+		$categories_data       = $per_page > 0 ? $categories_data_store->get_data(
+			apply_filters(
+				'woocommerce_analytics_categories_query_args',
+				array(
+					'orderby'       => 'items_sold',
+					'order'         => 'desc',
+					'after'         => $after,
+					'before'        => $before,
+					'per_page'      => $per_page,
+					'extended_info' => true,
+				)
+			)
+		)->data : array();
+
+		$rows = array();
+		foreach ( $categories_data as $category ) {
+			$url_query     = wp_parse_args(
+				array(
+					'filter'     => 'single_category',
+					'categories' => $category['category_id'],
+				),
+				$persisted_query
+			);
+			$category_url  = wc_admin_url( '/analytics/categories', $url_query );
+			$category_name = isset( $category['extended_info'] ) && isset( $category['extended_info']['name'] ) ? $category['extended_info']['name'] : '';
+			$rows[]        = array(
+				array(
+					'display' => "<a href='{$category_url}'>{$category_name}</a>",
+					'value'   => $category_name,
+				),
+				array(
+					'display' => wc_admin_number_format( $category['items_sold'] ),
+					'value'   => $category['items_sold'],
+				),
+				array(
+					'display' => wc_price( $category['net_revenue'] ),
+					'value'   => $category['net_revenue'],
+				),
+			);
+		}
+
+		return array(
+			'id'      => 'categories',
+			'label'   => __( 'Top categories - Items sold', 'woocommerce' ),
+			'headers' => array(
+				array(
+					'label' => __( 'Category', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Items sold', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Net sales', 'woocommerce' ),
+				),
+			),
+			'rows'    => $rows,
+		);
+	}
+
+	/**
+	 * Get the data for the customers leaderboard.
+	 *
+	 * @param int    $per_page Number of rows.
+	 * @param string $after Items after date.
+	 * @param string $before Items before date.
+	 * @param string $persisted_query URL query string.
+	 */
+	public function get_customers_leaderboard( $per_page, $after, $before, $persisted_query ) {
+		$customers_data_store = new CustomersDataStore();
+		$customers_data       = $per_page > 0 ? $customers_data_store->get_data(
+			apply_filters(
+				'woocommerce_analytics_customers_query_args',
+				array(
+					'orderby'      => 'total_spend',
+					'order'        => 'desc',
+					'order_after'  => $after,
+					'order_before' => $before,
+					'per_page'     => $per_page,
+				)
+			)
+		)->data : array();
+
+		$rows = array();
+		foreach ( $customers_data as $customer ) {
+			$url_query    = wp_parse_args(
+				array(
+					'filter'    => 'single_customer',
+					'customers' => $customer['id'],
+				),
+				$persisted_query
+			);
+			$customer_url = wc_admin_url( '/analytics/customers', $url_query );
+			$rows[]       = array(
+				array(
+					'display' => "<a href='{$customer_url}'>{$customer['name']}</a>",
+					'value'   => $customer['name'],
+				),
+				array(
+					'display' => wc_admin_number_format( $customer['orders_count'] ),
+					'value'   => $customer['orders_count'],
+				),
+				array(
+					'display' => wc_price( $customer['total_spend'] ),
+					'value'   => $customer['total_spend'],
+				),
+			);
+		}
+
+		return array(
+			'id'      => 'customers',
+			'label'   => __( 'Top Customers - Total Spend', 'woocommerce' ),
+			'headers' => array(
+				array(
+					'label' => __( 'Customer Name', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Orders', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Total Spend', 'woocommerce' ),
+				),
+			),
+			'rows'    => $rows,
+		);
+	}
+
+	/**
+	 * Get the data for the products leaderboard.
+	 *
+	 * @param int    $per_page Number of rows.
+	 * @param string $after Items after date.
+	 * @param string $before Items before date.
+	 * @param string $persisted_query URL query string.
+	 */
+	public function get_products_leaderboard( $per_page, $after, $before, $persisted_query ) {
+		$products_data_store = new ProductsDataStore();
+		$products_data       = $per_page > 0 ? $products_data_store->get_data(
+			apply_filters(
+				'woocommerce_analytics_products_query_args',
+				array(
+					'orderby'       => 'items_sold',
+					'order'         => 'desc',
+					'after'         => $after,
+					'before'        => $before,
+					'per_page'      => $per_page,
+					'extended_info' => true,
+				)
+			)
+		)->data : array();
+
+		$rows = array();
+		foreach ( $products_data as $product ) {
+			$url_query    = wp_parse_args(
+				array(
+					'filter'   => 'single_product',
+					'products' => $product['product_id'],
+				),
+				$persisted_query
+			);
+			$product_url  = wc_admin_url( '/analytics/products', $url_query );
+			$product_name = isset( $product['extended_info'] ) && isset( $product['extended_info']['name'] ) ? $product['extended_info']['name'] : '';
+			$rows[]       = array(
+				array(
+					'display' => "<a href='{$product_url}'>{$product_name}</a>",
+					'value'   => $product_name,
+				),
+				array(
+					'display' => wc_admin_number_format( $product['items_sold'] ),
+					'value'   => $product['items_sold'],
+				),
+				array(
+					'display' => wc_price( $product['net_revenue'] ),
+					'value'   => $product['net_revenue'],
+				),
+			);
+		}
+
+		return array(
+			'id'      => 'products',
+			'label'   => __( 'Top products - Items sold', 'woocommerce' ),
+			'headers' => array(
+				array(
+					'label' => __( 'Product', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Items sold', 'woocommerce' ),
+				),
+				array(
+					'label' => __( 'Net sales', 'woocommerce' ),
+				),
+			),
+			'rows'    => $rows,
+		);
+	}
+
+	/**
+	 * Get an array of all leaderboards.
+	 *
+	 * @param int    $per_page Number of rows.
+	 * @param string $after Items after date.
+	 * @param string $before Items before date.
+	 * @param string $persisted_query URL query string.
+	 * @return array
+	 */
+	public function get_leaderboards( $per_page, $after, $before, $persisted_query ) {
+		$leaderboards = array(
+			$this->get_customers_leaderboard( $per_page, $after, $before, $persisted_query ),
+			$this->get_coupons_leaderboard( $per_page, $after, $before, $persisted_query ),
+			$this->get_categories_leaderboard( $per_page, $after, $before, $persisted_query ),
+			$this->get_products_leaderboard( $per_page, $after, $before, $persisted_query ),
+		);
+
+		return apply_filters( 'woocommerce_leaderboards', $leaderboards, $per_page, $after, $before, $persisted_query );
+	}
+
+	/**
+	 * Return all leaderboards.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		$persisted_query = json_decode( $request['persisted_query'], true );
+		$leaderboards    = $this->get_leaderboards( $request['per_page'], $request['after'], $request['before'], $persisted_query );
+		$data            = array();
+
+		if ( ! empty( $leaderboards ) ) {
+			foreach ( $leaderboards as $leaderboard ) {
+				$response = $this->prepare_item_for_response( $leaderboard, $request );
+				$data[]   = $this->prepare_response_for_collection( $response );
+			}
+		}
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Returns a list of allowed leaderboards.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_allowed_items( $request ) {
+		$leaderboards = $this->get_leaderboards( 0, null, null, null );
+
+		$data = array();
+		foreach ( $leaderboards as $leaderboard ) {
+			$data[] = (object) array(
+				'id'      => $leaderboard['id'],
+				'label'   => $leaderboard['label'],
+				'headers' => $leaderboard['headers'],
+			);
+		}
+
+		$objects = array();
+		foreach ( $data as $item ) {
+			$prepared  = $this->prepare_item_for_response( $item, $request );
+			$objects[] = $this->prepare_response_for_collection( $prepared );
+		}
+
+		$response = rest_ensure_response( $objects );
+		$response->header( 'X-WP-Total', count( $data ) );
+		$response->header( 'X-WP-TotalPages', 1 );
+
+		$base = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+
+		return $response;
+	}
+
+	/**
+	 * Prepare the data object for response.
+	 *
+	 * @param object          $item Data object.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response $response Response data.
+	 */
+	public function prepare_item_for_response( $item, $request ) {
+		$data     = $this->add_additional_fields_to_object( $item, $request );
+		$data     = $this->filter_response_by_context( $data, 'view' );
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter the list returned from the API.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param array            $item     The original item.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_leaderboard', $response, $item, $request );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                    = array();
+		$params['page']            = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']        = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 5,
+			'minimum'           => 1,
+			'maximum'           => 20,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']           = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']          = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['persisted_query'] = array(
+			'description'       => __( 'URL query to persist across links.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+
+	/**
+	 * Get the schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'leaderboard',
+			'type'       => 'object',
+			'properties' => array(
+				'id'      => array(
+					'type'        => 'string',
+					'description' => __( 'Leaderboard ID.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'label'   => array(
+					'type'        => 'string',
+					'description' => __( 'Displayed title for the leaderboard.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'headers' => array(
+					'type'        => 'array',
+					'description' => __( 'Table headers.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'array',
+						'properties' => array(
+							'label' => array(
+								'description' => __( 'Table column header.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+						),
+					),
+				),
+				'rows'    => array(
+					'type'        => 'array',
+					'description' => __( 'Table rows.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'array',
+						'properties' => array(
+							'display' => array(
+								'description' => __( 'Table cell display.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'value'   => array(
+								'description' => __( 'Table cell value.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get schema for the list of allowed leaderboards.
+	 *
+	 * @return array $schema
+	 */
+	public function get_public_allowed_item_schema() {
+		$schema = $this->get_public_item_schema();
+		unset( $schema['properties']['rows'] );
+		return $schema;
+	}
+}

packages/woocommerce-admin/src/API/Marketing.php

@@ -0,0 +1,120 @@
+<?php
+/**
+ * REST API Marketing Controller
+ *
+ * Handles requests to /marketing.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+use Automattic\WooCommerce\Admin\Features\Marketing as MarketingFeature;
+use Automattic\WooCommerce\Admin\PluginsHelper;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Marketing Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class Marketing extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'marketing';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/recommended',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_recommended_plugins' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => array(
+						'per_page' => $this->get_collection_params()['per_page'],
+						'category' => array(
+							'type'              => 'string',
+							'validate_callback' => 'rest_validate_request_arg',
+							'sanitize_callback' => 'sanitize_title_with_dashes',
+						),
+					),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/knowledge-base',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_knowledge_base_posts' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => array(
+						'category' => array(
+							'type'              => 'string',
+							'validate_callback' => 'rest_validate_request_arg',
+							'sanitize_callback' => 'sanitize_title_with_dashes',
+						),
+					),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Return installed marketing extensions data.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function get_recommended_plugins( $request ) {
+		// Default to marketing category (if no category set).
+		$category      = ( ! empty( $request->get_param( 'category' ) ) ) ? $request->get_param( 'category' ) : 'marketing';
+		$all_plugins   = MarketingFeature::get_instance()->get_recommended_plugins();
+		$valid_plugins = [];
+		$per_page      = $request->get_param( 'per_page' );
+
+		foreach ( $all_plugins as $plugin ) {
+
+			// default to marketing if 'categories' is empty on the plugin object (support for legacy api while testing).
+			$plugin_categories = ( ! empty( $plugin['categories'] ) ) ? $plugin['categories'] : [ 'marketing' ];
+
+			if ( ! PluginsHelper::is_plugin_installed( $plugin['plugin'] ) && in_array( $category, $plugin_categories, true ) ) {
+				$valid_plugins[] = $plugin;
+			}
+		}
+
+		return rest_ensure_response( array_slice( $valid_plugins, 0, $per_page ) );
+	}
+
+	/**
+	 * Return installed marketing extensions data.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function get_knowledge_base_posts( $request ) {
+		$category = $request->get_param( 'category' );
+		return rest_ensure_response( MarketingFeature::get_instance()->get_knowledge_base_posts( $category ) );
+	}
+}

packages/woocommerce-admin/src/API/MarketingOverview.php

@@ -0,0 +1,130 @@
+<?php
+/**
+ * REST API Marketing Overview Controller
+ *
+ * Handles requests to /marketing/overview.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+use Automattic\WooCommerce\Admin\Marketing\InstalledExtensions;
+use Automattic\WooCommerce\Admin\PluginsHelper;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Marketing Overview Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class MarketingOverview extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'marketing/overview';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/activate-plugin',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'activate_plugin' ),
+					'permission_callback' => array( $this, 'install_plugins_permissions_check' ),
+					'args'                => array(
+						'plugin' => array(
+							'required'          => true,
+							'type'              => 'string',
+							'validate_callback' => 'rest_validate_request_arg',
+							'sanitize_callback' => 'sanitize_title_with_dashes',
+						),
+					),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/installed-plugins',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_installed_plugins' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Return installed marketing extensions data.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function activate_plugin( $request ) {
+		$plugin_slug = $request->get_param( 'plugin' );
+
+		if ( ! PluginsHelper::is_plugin_installed( $plugin_slug ) ) {
+			return new \WP_Error( 'woocommerce_rest_invalid_plugin', __( 'Invalid plugin.', 'woocommerce' ), 404 );
+		}
+
+		$result = activate_plugin( PluginsHelper::get_plugin_path_from_slug( $plugin_slug ) );
+
+		if ( ! is_null( $result ) ) {
+			return new \WP_Error( 'woocommerce_rest_invalid_plugin', __( 'The plugin could not be activated.', 'woocommerce' ), 500 );
+		}
+
+		// IMPORTANT - Don't return the active plugins data here.
+		// Instead we will get that data in a separate request to ensure they are loaded.
+		return rest_ensure_response(
+			array(
+				'status' => 'success',
+			)
+		);
+	}
+
+	/**
+	 * Check if a given request has access to manage plugins.
+	 *
+	 * @param \WP_REST_Request $request Full details about the request.
+	 *
+	 * @return \WP_Error|boolean
+	 */
+	public function install_plugins_permissions_check( $request ) {
+		if ( ! current_user_can( 'install_plugins' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_update', __( 'Sorry, you cannot manage plugins.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Return installed marketing extensions data.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function get_installed_plugins( $request ) {
+		return rest_ensure_response( InstalledExtensions::get_data() );
+	}
+
+}

packages/woocommerce-admin/src/API/NavigationFavorites.php

@@ -0,0 +1,327 @@
+<?php
+/**
+ * REST API Navigation Favorites controller
+ *
+ * Handles requests to the navigation favorites endpoint
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Features\Navigation\Favorites;
+
+/**
+ * REST API Favorites controller class.
+ *
+ * @extends WC_REST_CRUD_Controller
+ */
+class NavigationFavorites extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'navigation/favorites';
+
+	/**
+	 * Error code to status code mapping.
+	 *
+	 * @var array
+	 */
+	protected $error_to_status_map = array(
+		'woocommerce_favorites_invalid_request' => 400,
+		'woocommerce_favorites_already_exists'  => 409,
+		'woocommerce_favorites_does_not_exist'  => 404,
+		'woocommerce_favorites_invalid_user'    => 400,
+		'woocommerce_favorites_unauthenticated' => 401,
+	);
+
+	/**
+	 * Register the routes
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => array(
+						'user_id' => array(
+							'required'          => true,
+							'validate_callback' => function( $param, $request, $key ) {
+								return is_numeric( $param );
+							},
+						),
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::CREATABLE,
+					'callback'            => array( $this, 'add_item' ),
+					'permission_callback' => array( $this, 'add_item_permissions_check' ),
+					'args'                => array(
+						'item_id' => array(
+							'required' => true,
+						),
+						'user_id' => array(
+							'required'          => true,
+							'validate_callback' => function( $param, $request, $key ) {
+								return is_numeric( $param );
+							},
+						),
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::DELETABLE,
+					'callback'            => array( $this, 'delete_item' ),
+					'permission_callback' => array( $this, 'delete_item_permissions_check' ),
+					'args'                => array(
+						'item_id' => array(
+							'required' => true,
+						),
+						'user_id' => array(
+							'required'          => true,
+							'validate_callback' => function( $param, $request, $key ) {
+								return is_numeric( $param );
+							},
+						),
+					),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/me',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items_by_current_user' ),
+					'permission_callback' => array( $this, 'current_user_permissions_check' ),
+				),
+				array(
+					'methods'             => \WP_REST_Server::CREATABLE,
+					'callback'            => array( $this, 'add_item_by_current_user' ),
+					'permission_callback' => array( $this, 'current_user_permissions_check' ),
+					'args'                => array(
+						'item_id' => array(
+							'required' => true,
+						),
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::DELETABLE,
+					'callback'            => array( $this, 'delete_item_by_current_user' ),
+					'permission_callback' => array( $this, 'current_user_permissions_check' ),
+					'args'                => array(
+						'item_id' => array(
+							'required' => true,
+						),
+					),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+	}
+
+	/**
+	 * Get all favorites.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		$user_id = $request->get_param( 'user_id' );
+
+		$response = Favorites::get_all( $user_id );
+
+		if ( is_wp_error( $response ) || ! $response ) {
+			return rest_ensure_response( $this->prepare_error( $response ) );
+		}
+
+		return rest_ensure_response(
+			array_map( 'stripslashes', $response )
+		);
+	}
+
+	/**
+	 * Get all favorites of current user.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function get_items_by_current_user( $request ) {
+		$current_user = get_current_user_id();
+
+		if ( ! $current_user ) {
+			return $this->prepare_error(
+				new \WP_Error(
+					'woocommerce_favorites_unauthenticated',
+					__( 'You must be authenticated to use this endpoint', 'woocommerce' )
+				)
+			);
+		}
+
+		$request->set_param( 'user_id', $current_user );
+
+		return $this->get_items( $request );
+	}
+
+	/**
+	 * Add a favorite.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function add_item( $request ) {
+		$user_id = $request->get_param( 'user_id' );
+		$fav_id  = $request->get_param( 'item_id' );
+		$user    = get_userdata( $user_id );
+
+		if ( false === $user ) {
+			return $this->prepare_error(
+				new \WP_Error(
+					'woocommerce_favorites_invalid_user',
+					__( 'Invalid user_id provided', 'woocommerce' )
+				)
+			);
+		}
+
+		$response = Favorites::add_item( $fav_id, $user_id );
+
+		if ( is_wp_error( $response ) || ! $response ) {
+			return rest_ensure_response( $this->prepare_error( $response ) );
+		}
+
+		return rest_ensure_response( Favorites::get_all( $user_id ) );
+	}
+
+	/**
+	 * Add a favorite for current user.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function add_item_by_current_user( $request ) {
+		$current_user = get_current_user_id();
+
+		if ( ! $current_user ) {
+			return $this->prepare_error(
+				new \WP_Error(
+					'woocommerce_favorites_unauthenticated',
+					__( 'You must be authenticated to use this endpoint', 'woocommerce' )
+				)
+			);
+		}
+
+		$request->set_param( 'user_id', get_current_user_id() );
+		return $this->add_item( $request );
+	}
+
+	/**
+	 * Delete a favorite.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function delete_item( $request ) {
+		$user_id = $request->get_param( 'user_id' );
+		$fav_id  = $request->get_param( 'item_id' );
+
+		$response = Favorites::remove_item( $fav_id, $user_id );
+
+		if ( is_wp_error( $response ) || ! $response ) {
+			return rest_ensure_response( $this->prepare_error( $response ) );
+		}
+
+		return rest_ensure_response( Favorites::get_all( $user_id ) );
+	}
+
+	/**
+	 * Delete a favorite for current user.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function delete_item_by_current_user( $request ) {
+		$current_user = get_current_user_id();
+
+		if ( ! $current_user ) {
+			return $this->prepare_error(
+				new \WP_Error(
+					'woocommerce_favorites_unauthenticated',
+					__( 'You must be authenticated to use this endpoint', 'woocommerce' )
+				)
+			);
+		}
+
+		$request->set_param( 'user_id', $current_user );
+
+		return $this->delete_item( $request );
+	}
+
+
+	/**
+	 * Check whether a given request has permission to create favorites.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function add_item_permissions_check( $request ) {
+		return current_user_can( 'edit_users' );
+	}
+
+	/**
+	 * Check whether a given request has permission to delete notes.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function delete_item_permissions_check( $request ) {
+		return current_user_can( 'edit_users' );
+	}
+
+	/**
+	 * Always allow for operations that only impact current user
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function current_user_permissions_check( $request ) {
+		return true;
+	}
+
+	/**
+	 * Accept an instance of WP_Error and add the appropriate data for REST transit.
+	 *
+	 * @param  WP_Error $error Error to prepare.
+	 * @return WP_Error
+	 */
+	protected function prepare_error( $error ) {
+		if ( ! is_wp_error( $error ) ) {
+			return $error;
+		}
+
+		$error->add_data(
+			array(
+				'status' => $this->error_to_status_map[ $error->get_error_code() ] ?? 500,
+			)
+		);
+
+		return $error;
+	}
+
+}

packages/woocommerce-admin/src/API/NoteActions.php

@@ -0,0 +1,86 @@
+<?php
+/**
+ * REST API Admin Note Action controller
+ *
+ * Handles requests to the admin note action endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Notes\Note;
+use \Automattic\WooCommerce\Admin\Notes\Notes as NotesFactory;
+
+/**
+ * REST API Admin Note Action controller class.
+ *
+ * @extends WC_REST_CRUD_Controller
+ */
+class NoteActions extends Notes {
+
+	/**
+	 * Register the routes for admin notes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<note_id>[\d-]+)/action/(?P<action_id>[\d-]+)',
+			array(
+				'args'   => array(
+					'note_id'   => array(
+						'description' => __( 'Unique ID for the Note.', 'woocommerce' ),
+						'type'        => 'integer',
+					),
+					'action_id' => array(
+						'description' => __( 'Unique ID for the Note Action.', 'woocommerce' ),
+						'type'        => 'integer',
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'trigger_note_action' ),
+					// @todo - double check these permissions for taking note actions.
+					'permission_callback' => array( $this, 'get_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Trigger a note action.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function trigger_note_action( $request ) {
+		$note = NotesFactory::get_note( $request->get_param( 'note_id' ) );
+
+		if ( ! $note ) {
+			return new \WP_Error(
+				'woocommerce_note_invalid_id',
+				__( 'Sorry, there is no resource with that ID.', 'woocommerce' ),
+				array( 'status' => 404 )
+			);
+		}
+
+		$triggered_action = NotesFactory::get_action_by_id( $note, $request->get_param( 'action_id' ) );
+
+		if ( ! $triggered_action ) {
+			return new \WP_Error(
+				'woocommerce_note_action_invalid_id',
+				__( 'Sorry, there is no resource with that ID.', 'woocommerce' ),
+				array( 'status' => 404 )
+			);
+		}
+
+		$triggered_note = NotesFactory::trigger_note_action( $note, $triggered_action );
+
+		$data = $triggered_note->get_data();
+		$data = $this->prepare_item_for_response( $data, $request );
+		$data = $this->prepare_response_for_collection( $data );
+
+		return rest_ensure_response( $data );
+	}
+}

packages/woocommerce-admin/src/API/Notes.php

@@ -0,0 +1,725 @@
+<?php
+/**
+ * REST API Admin Notes controller
+ *
+ * Handles requests to the admin notes endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Notes\Note;
+use Automattic\WooCommerce\Admin\Notes\Notes as NotesRepository;
+
+/**
+ * REST API Admin Notes controller class.
+ *
+ * @extends WC_REST_CRUD_Controller
+ */
+class Notes extends \WC_REST_CRUD_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'admin/notes';
+
+	/**
+	 * Register the routes for admin notes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<id>[\d-]+)',
+			array(
+				'args'   => array(
+					'id' => array(
+						'description' => __( 'Unique ID for the resource.', 'woocommerce' ),
+						'type'        => 'integer',
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_item' ),
+					'permission_callback' => array( $this, 'get_item_permissions_check' ),
+				),
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'update_item' ),
+					'permission_callback' => array( $this, 'update_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/delete/(?P<id>[\d-]+)',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::DELETABLE,
+					'callback'            => array( $this, 'delete_item' ),
+					'permission_callback' => array( $this, 'update_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/delete/all',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::DELETABLE,
+					'callback'            => array( $this, 'delete_all_items' ),
+					'permission_callback' => array( $this, 'update_items_permissions_check' ),
+					'args'                => array(
+						'status' => array(
+							'description'       => __( 'Status of note.', 'woocommerce' ),
+							'type'              => 'array',
+							'sanitize_callback' => 'wp_parse_slug_list',
+							'validate_callback' => 'rest_validate_request_arg',
+							'items'             => array(
+								'enum' => Note::get_allowed_statuses(),
+								'type' => 'string',
+							),
+						),
+					),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/tracker/(?P<note_id>[\d-]+)/user/(?P<user_id>[\d-]+)',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'track_opened_email' ),
+					'permission_callback' => '__return_true',
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/update',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'batch_update_items' ),
+					'permission_callback' => array( $this, 'update_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Get a single note.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response|WP_Error
+	 */
+	public function get_item( $request ) {
+		$note = NotesRepository::get_note( $request->get_param( 'id' ) );
+
+		if ( ! $note ) {
+			return new \WP_Error(
+				'woocommerce_note_invalid_id',
+				__( 'Sorry, there is no resource with that ID.', 'woocommerce' ),
+				array( 'status' => 404 )
+			);
+		}
+
+		if ( is_wp_error( $note ) ) {
+			return $note;
+		}
+
+		$data = $this->prepare_note_data_for_response( $note, $request );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Get all notes.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		$query_args = $this->prepare_objects_query( $request );
+
+		$notes = NotesRepository::get_notes( 'edit', $query_args );
+
+		$data = array();
+		foreach ( (array) $notes as $note_obj ) {
+			$note   = $this->prepare_item_for_response( $note_obj, $request );
+			$note   = $this->prepare_response_for_collection( $note );
+			$data[] = $note;
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', NotesRepository::get_notes_count( $query_args['type'], $query_args['status'] ) );
+
+		return $response;
+	}
+
+	/**
+	 * Prepare objects query.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $request ) {
+		$args               = array();
+		$args['order']      = $request['order'];
+		$args['orderby']    = $request['orderby'];
+		$args['per_page']   = $request['per_page'];
+		$args['page']       = $request['page'];
+		$args['type']       = isset( $request['type'] ) ? $request['type'] : array();
+		$args['status']     = isset( $request['status'] ) ? $request['status'] : array();
+		$args['source']     = isset( $request['source'] ) ? $request['source'] : array();
+		$args['is_deleted'] = 0;
+
+		if ( 'date' === $args['orderby'] ) {
+			$args['orderby'] = 'date_created';
+		}
+
+		/**
+		 * Filter the query arguments for a request.
+		 *
+		 * Enables adding extra arguments or setting defaults for a post
+		 * collection request.
+		 *
+		 * @param array           $args    Key value array of query var to query value.
+		 * @param WP_REST_Request $request The request used.
+		 */
+		$args = apply_filters( 'woocommerce_rest_notes_object_query', $args, $request );
+
+		return $args;
+	}
+
+	/**
+	 * Check whether a given request has permission to read a single note.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_item_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'system_status', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check whether a given request has permission to read notes.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'system_status', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Update a single note.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function update_item( $request ) {
+		$note = NotesRepository::get_note( $request->get_param( 'id' ) );
+
+		if ( ! $note ) {
+			return new \WP_Error(
+				'woocommerce_note_invalid_id',
+				__( 'Sorry, there is no resource with that ID.', 'woocommerce' ),
+				array( 'status' => 404 )
+			);
+		}
+
+		NotesRepository::update_note( $note, $this->get_requested_updates( $request ) );
+		return $this->get_item( $request );
+	}
+
+	/**
+	 * Delete a single note.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function delete_item( $request ) {
+		$note = NotesRepository::get_note( $request->get_param( 'id' ) );
+
+		if ( ! $note ) {
+			return new \WP_Error(
+				'woocommerce_note_invalid_id',
+				__( 'Sorry, there is no note with that ID.', 'woocommerce' ),
+				array( 'status' => 404 )
+			);
+		}
+
+		NotesRepository::delete_note( $note );
+		$data = $this->prepare_note_data_for_response( $note, $request );
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Delete all notes.
+	 *
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function delete_all_items( $request ) {
+		$args = array();
+		if ( isset( $request['status'] ) ) {
+			$args['status'] = $request['status'];
+		}
+		$notes = NotesRepository::delete_all_notes( $args );
+		$data  = array();
+		foreach ( (array) $notes as $note_obj ) {
+			$data[] = $this->prepare_note_data_for_response( $note_obj, $request );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', NotesRepository::get_notes_count( array( 'info', 'warning' ), array() ) );
+		return $response;
+	}
+
+	/**
+	 * Prepare note data.
+	 *
+	 * @param Note            $note     Note data.
+	 * @param WP_REST_Request $request  Request object.
+	 *
+	 * @return WP_REST_Response $response Response data.
+	 */
+	public function prepare_note_data_for_response( $note, $request ) {
+		$note = $note->get_data();
+		$note = $this->prepare_item_for_response( $note, $request );
+		return $this->prepare_response_for_collection( $note );
+	}
+
+	/**
+	 * Prepare an array with the the requested updates.
+	 *
+	 * @param WP_REST_Request $request  Request object.
+	 * @return array A list of the requested updates values.
+	 */
+	public function get_requested_updates( $request ) {
+		$requested_updates = array();
+		if ( ! is_null( $request->get_param( 'status' ) ) ) {
+			$requested_updates['status'] = $request->get_param( 'status' );
+		}
+
+		if ( ! is_null( $request->get_param( 'date_reminder' ) ) ) {
+			$requested_updates['date_reminder'] = $request->get_param( 'date_reminder' );
+		}
+
+		if ( ! is_null( $request->get_param( 'is_deleted' ) ) ) {
+			$requested_updates['is_deleted'] = $request->get_param( 'is_deleted' );
+		}
+		return $requested_updates;
+	}
+
+	/**
+	 * Batch update a set of notes.
+	 *
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function undoremove_items( $request ) {
+		wc_deprecated_function( 'undoremove_items', '4.4', '\Automattic\WooCommerce\Admin\API\Notes()->undoremove_items' );
+		return self::batch_update_items( $request );
+	}
+
+	/**
+	 * Batch update a set of notes.
+	 *
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function batch_update_items( $request ) {
+		$data     = array();
+		$note_ids = $request->get_param( 'noteIds' );
+
+		if ( ! isset( $note_ids ) || ! is_array( $note_ids ) ) {
+			return new \WP_Error(
+				'woocommerce_note_invalid_ids',
+				__( 'Please provide an array of IDs through the noteIds param.', 'woocommerce' ),
+				array( 'status' => 422 )
+			);
+		}
+
+		foreach ( (array) $note_ids as $note_id ) {
+			$note = NotesRepository::get_note( (int) $note_id );
+			if ( $note ) {
+				NotesRepository::update_note( $note, $this->get_requested_updates( $request ) );
+				$data[] = $this->prepare_note_data_for_response( $note, $request );
+			}
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', NotesRepository::get_notes_count( array( 'info', 'warning' ), array() ) );
+		return $response;
+	}
+
+	/**
+	 * Makes sure the current user has access to WRITE the settings APIs.
+	 *
+	 * @param WP_REST_Request $request Full data about the request.
+	 * @return WP_Error|bool
+	 */
+	public function update_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'edit' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_edit', __( 'Sorry, you cannot edit this resource.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+		return true;
+	}
+
+	/**
+	 * Prepare a path or query for serialization to the client.
+	 *
+	 * @param string $query The query, path, or URL to transform.
+	 * @return string A fully formed URL.
+	 */
+	public function prepare_query_for_response( $query ) {
+		if ( empty( $query ) ) {
+			return $query;
+		}
+		if ( 'https://' === substr( $query, 0, 8 ) ) {
+			return $query;
+		}
+		if ( 'http://' === substr( $query, 0, 7 ) ) {
+			return $query;
+		}
+		if ( '?' === substr( $query, 0, 1 ) ) {
+			return admin_url( 'admin.php' . $query );
+		}
+
+		return admin_url( $query );
+	}
+
+	/**
+	 * Maybe add a nonce to a URL.
+	 *
+	 * @link https://codex.wordpress.org/WordPress_Nonces
+	 *
+	 * @param string $url The URL needing a nonce.
+	 * @param string $action The nonce action.
+	 * @param string $name The nonce anme.
+	 * @return string A fully formed URL.
+	 */
+	private function maybe_add_nonce_to_url( string $url, string $action = '', string $name = '' ) : string {
+		if ( empty( $action ) ) {
+			return $url;
+		}
+
+		if ( empty( $name ) ) {
+			// Default paramater name.
+			$name = '_wpnonce';
+		}
+
+		return add_query_arg( $name, wp_create_nonce( $action ), $url );
+	}
+
+	/**
+	 * Prepare a note object for serialization.
+	 *
+	 * @param array           $data Note data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response $response Response data.
+	 */
+	public function prepare_item_for_response( $data, $request ) {
+		$context                   = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data                      = $this->add_additional_fields_to_object( $data, $request );
+		$data['date_created_gmt']  = wc_rest_prepare_date_response( $data['date_created'] );
+		$data['date_created']      = wc_rest_prepare_date_response( $data['date_created'], false );
+		$data['date_reminder_gmt'] = wc_rest_prepare_date_response( $data['date_reminder'] );
+		$data['date_reminder']     = wc_rest_prepare_date_response( $data['date_reminder'], false );
+		$data['title']             = stripslashes( $data['title'] );
+		$data['content']           = stripslashes( $data['content'] );
+		$data['is_snoozable']      = (bool) $data['is_snoozable'];
+		$data['is_deleted']        = (bool) $data['is_deleted'];
+		foreach ( (array) $data['actions'] as $key => $value ) {
+			$data['actions'][ $key ]->label  = stripslashes( $data['actions'][ $key ]->label );
+			$data['actions'][ $key ]->url    = $this->maybe_add_nonce_to_url(
+				$this->prepare_query_for_response( $data['actions'][ $key ]->query ),
+				(string) $data['actions'][ $key ]->nonce_action,
+				(string) $data['actions'][ $key ]->nonce_name
+			);
+			$data['actions'][ $key ]->status = stripslashes( $data['actions'][ $key ]->status );
+		}
+		$data = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links(
+			array(
+				'self'       => array(
+					'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $data['id'] ) ),
+				),
+				'collection' => array(
+					'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
+				),
+			)
+		);
+		/**
+		 * Filter a note returned from the API.
+		 *
+		 * Allows modification of the note data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param array            $data The original note.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_note', $response, $data, $request );
+	}
+
+
+	/**
+	 * Track opened emails.
+	 *
+	 * @param WP_REST_Request $request Request object.
+	 */
+	public function track_opened_email( $request ) {
+		$note = NotesRepository::get_note( $request->get_param( 'note_id' ) );
+		if ( ! $note ) {
+			return;
+		}
+
+		NotesRepository::record_tracks_event_with_user( $request->get_param( 'user_id' ), 'email_note_opened', array( 'note_name' => $note->get_name() ) );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params             = array();
+		$params['context']  = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['order']    = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']  = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'note_id',
+				'date',
+				'type',
+				'title',
+				'status',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['page']     = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page'] = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['type']     = array(
+			'description'       => __( 'Type of note.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'enum' => Note::get_allowed_types(),
+				'type' => 'string',
+			),
+		);
+		$params['status']   = array(
+			'description'       => __( 'Status of note.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'enum' => Note::get_allowed_statuses(),
+				'type' => 'string',
+			),
+		);
+		$params['source']   = array(
+			'description'       => __( 'Source of note.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+		return $params;
+	}
+
+	/**
+	 * Get the note's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'note',
+			'type'       => 'object',
+			'properties' => array(
+				'id'                => array(
+					'description' => __( 'ID of the note record.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'name'              => array(
+					'description' => __( 'Name of the note.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'type'              => array(
+					'description' => __( 'The type of the note (e.g. error, warning, etc.).', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'locale'            => array(
+					'description' => __( 'Locale used for the note title and content.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'title'             => array(
+					'description' => __( 'Title of the note.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'content'           => array(
+					'description' => __( 'Content of the note.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'content_data'      => array(
+					'description' => __( 'Content data for the note. JSON string. Available for re-localization.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'status'            => array(
+					'description' => __( 'The status of the note (e.g. unactioned, actioned).', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+				),
+				'source'            => array(
+					'description' => __( 'Source of the note.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_created'      => array(
+					'description' => __( 'Date the note was created.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_created_gmt'  => array(
+					'description' => __( 'Date the note was created (GMT).', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_reminder'     => array(
+					'description' => __( 'Date after which the user should be reminded of the note, if any.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true, // @todo Allow date_reminder to be updated.
+				),
+				'date_reminder_gmt' => array(
+					'description' => __( 'Date after which the user should be reminded of the note, if any (GMT).', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'is_snoozable'      => array(
+					'description' => __( 'Whether or not a user can request to be reminded about the note.', 'woocommerce' ),
+					'type'        => 'boolean',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'actions'           => array(
+					'description' => __( 'An array of actions, if any, for the note.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'layout'            => array(
+					'description' => __( 'The layout of the note (e.g. banner, thumbnail, plain).', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'image'             => array(
+					'description' => __( 'The image of the note, if any.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'is_deleted'        => array(
+					'description' => __( 'Registers whether the note is deleted or not', 'woocommerce' ),
+					'type'        => 'boolean',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+		return $this->add_additional_fields_schema( $schema );
+	}
+}

packages/woocommerce-admin/src/API/OnboardingFreeExtensions.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * REST API Onboarding Free Extensions Controller
+ *
+ * Handles requests to /onboarding/free-extensions
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Features\RemoteFreeExtensions\Init as RemoteFreeExtensions;
+
+/**
+ * Onboarding Payments Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class OnboardingFreeExtensions extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'onboarding/free-extensions';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_available_extensions' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check whether a given request has permission to read onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Return available payment methods.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function get_available_extensions( $request ) {
+		return RemoteFreeExtensions::get_extensions();
+	}
+
+}

packages/woocommerce-admin/src/API/OnboardingPayments.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * REST API Onboarding Payments Controller
+ *
+ * Handles requests to /onboarding/payments
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Features\PaymentGatewaySuggestions\Init as PaymentGatewaySuggestions;
+
+/**
+ * Onboarding Payments Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class OnboardingPayments extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'onboarding/payments';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_suggestions' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check whether a given request has permission to read onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Return available payment gateway suggestions.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function get_suggestions( $request ) {
+		return PaymentGatewaySuggestions::get_suggestions();
+	}
+
+}

packages/woocommerce-admin/src/API/OnboardingProductTypes.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * REST API Onboarding Product Types Controller
+ *
+ * Handles requests to /onboarding/product-types
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+use Automattic\WooCommerce\Admin\Features\Onboarding;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Onboarding Product Types Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class OnboardingProductTypes extends \WC_REST_Data_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'onboarding/product-types';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_product_types' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check whether a given request has permission to read onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Return available product types.
+	 *
+	 * @param \WP_REST_Request $request Request data.
+	 *
+	 * @return \WP_Error|\WP_REST_Response
+	 */
+	public function get_product_types( $request ) {
+		return Onboarding::get_allowed_product_types();
+	}
+
+}

packages/woocommerce-admin/src/API/OnboardingProfile.php

@@ -0,0 +1,489 @@
+<?php
+/**
+ * REST API Onboarding Profile Controller
+ *
+ * Handles requests to /onboarding/profile
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Features\Onboarding;
+use \Automattic\Jetpack\Connection\Manager as Jetpack_Connection_Manager;
+
+/**
+ * Onboarding Profile controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class OnboardingProfile extends \WC_REST_Data_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'onboarding/profile';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'update_items' ),
+					'permission_callback' => array( $this, 'update_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		// This endpoint is experimental. For internal use only.
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/experimental_get_email_prefill',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_email_prefill' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check whether a given request has permission to read onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check whether a given request has permission to edit onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function update_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'edit' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot edit this resource.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Return all onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper-options.php';
+
+		$onboarding_data             = get_option( Onboarding::PROFILE_DATA_OPTION, array() );
+		$onboarding_data['industry'] = isset( $onboarding_data['industry'] ) ? $this->filter_industries( $onboarding_data['industry'] ) : null;
+		$item_schema                 = $this->get_item_schema();
+		$items                       = array();
+		foreach ( $item_schema['properties'] as $key => $property_schema ) {
+			$items[ $key ] = isset( $onboarding_data[ $key ] ) ? $onboarding_data[ $key ] : null;
+		}
+
+		$wccom_auth               = \WC_Helper_Options::get( 'auth' );
+		$items['wccom_connected'] = empty( $wccom_auth['access_token'] ) ? false : true;
+
+		$item = $this->prepare_item_for_response( $items, $request );
+		$data = $this->prepare_response_for_collection( $item );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Filter the industries.
+	 *
+	 * @param  array $industries list of industries.
+	 * @return array
+	 */
+	public function filter_industries( $industries ) {
+		return apply_filters(
+			'woocommerce_admin_onboarding_industries',
+			$industries
+		);
+	}
+
+	/**
+	 * Update onboarding profile data.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function update_items( $request ) {
+		$params          = $request->get_json_params();
+		$query_args      = $this->prepare_objects_query( $params );
+		$onboarding_data = (array) get_option( Onboarding::PROFILE_DATA_OPTION, array() );
+		$profile_data    = array_merge( $onboarding_data, $query_args );
+		update_option( Onboarding::PROFILE_DATA_OPTION, $profile_data );
+		do_action( 'woocommerce_onboarding_profile_data_updated', $onboarding_data, $query_args );
+
+		$result = array(
+			'status'  => 'success',
+			'message' => __( 'Onboarding profile data has been updated.', 'woocommerce' ),
+		);
+
+		$response = $this->prepare_item_for_response( $result, $request );
+		$data     = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Returns a default email to be pre-filled in OBW. Prioritizes Jetpack if connected,
+	 * otherwise will default to WordPress general settings.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_email_prefill( $request ) {
+		$result = array(
+			'email' => '',
+		);
+
+		// Attempt to get email from Jetpack.
+		if ( class_exists( Jetpack_Connection_Manager::class ) ) {
+			$jetpack_connection_manager = new Jetpack_Connection_Manager();
+			if ( $jetpack_connection_manager->is_active() ) {
+				$jetpack_user = $jetpack_connection_manager->get_connected_user_data();
+
+				$result['email'] = $jetpack_user['email'];
+			}
+		}
+
+		// Attempt to get email from WordPress general settings.
+		if ( empty( $result['email'] ) ) {
+			$result['email'] = get_option( 'admin_email' );
+		}
+
+		return rest_ensure_response( $result );
+	}
+
+	/**
+	 * Prepare objects query.
+	 *
+	 * @param  array $params The params sent in the request.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $params ) {
+		$args       = array();
+		$properties = self::get_profile_properties();
+
+		foreach ( $properties as $key => $property ) {
+			if ( isset( $params[ $key ] ) ) {
+				$args[ $key ] = $params[ $key ];
+			}
+		}
+
+		/**
+		 * Filter the query arguments for a request.
+		 *
+		 * Enables adding extra arguments or setting defaults for a post
+		 * collection request.
+		 *
+		 * @param array $args    Key value array of query var to query value.
+		 * @param array $params The params sent in the request.
+		 */
+		$args = apply_filters( 'woocommerce_rest_onboarding_profile_object_query', $args, $params );
+
+		return $args;
+	}
+
+
+	/**
+	 * Prepare the data object for response.
+	 *
+	 * @param object          $item Data object.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response $response Response data.
+	 */
+	public function prepare_item_for_response( $item, $request ) {
+		$data     = $this->add_additional_fields_to_object( $item, $request );
+		$data     = $this->filter_response_by_context( $data, 'view' );
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter the list returned from the API.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param array            $item     The original item.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_onboarding_prepare_profile', $response, $item, $request );
+	}
+
+	/**
+	 * Get onboarding profile properties.
+	 *
+	 * @return array
+	 */
+	public static function get_profile_properties() {
+		$properties = array(
+			'completed'           => array(
+				'type'              => 'boolean',
+				'description'       => __( 'Whether or not the profile was completed.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+			),
+			'skipped'             => array(
+				'type'              => 'boolean',
+				'description'       => __( 'Whether or not the profile was skipped.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+			),
+			'industry'            => array(
+				'type'              => 'array',
+				'description'       => __( 'Industry.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+				'items'             => array(
+					'type' => 'object',
+				),
+			),
+			'product_types'       => array(
+				'type'              => 'array',
+				'description'       => __( 'Types of products sold.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'sanitize_callback' => 'wp_parse_slug_list',
+				'validate_callback' => 'rest_validate_request_arg',
+				'items'             => array(
+					'enum' => array_keys( Onboarding::get_allowed_product_types() ),
+					'type' => 'string',
+				),
+			),
+			'product_count'       => array(
+				'type'              => 'string',
+				'description'       => __( 'Number of products to be added.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+				'enum'              => array(
+					'0',
+					'1-10',
+					'11-100',
+					'101-1000',
+					'1000+',
+				),
+			),
+			'selling_venues'      => array(
+				'type'              => 'string',
+				'description'       => __( 'Other places the store is selling products.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+				'enum'              => array(
+					'no',
+					'other',
+					'brick-mortar',
+					'brick-mortar-other',
+					'other-woocommerce',
+				),
+			),
+			'revenue'             => array(
+				'type'              => 'string',
+				'description'       => __( 'Current annual revenue of the store.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+				'enum'              => array(
+					'none',
+					'up-to-2500',
+					'2500-10000',
+					'10000-50000',
+					'50000-250000',
+					'more-than-250000',
+					'rather-not-say',
+				),
+			),
+			'other_platform'      => array(
+				'type'              => 'string',
+				'description'       => __( 'Name of other platform used to sell.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+				'enum'              => array(
+					'shopify',
+					'bigcommerce',
+					'magento',
+					'wix',
+					'amazon',
+					'ebay',
+					'etsy',
+					'squarespace',
+					'other',
+				),
+			),
+			'other_platform_name' => array(
+				'type'              => 'string',
+				'description'       => __( 'Name of other platform used to sell (not listed).', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+			),
+			'business_extensions' => array(
+				'type'              => 'array',
+				'description'       => __( 'Extra business extensions to install.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'sanitize_callback' => 'wp_parse_slug_list',
+				'validate_callback' => 'rest_validate_request_arg',
+				'items'             => array(
+					'enum' => array(
+						'jetpack',
+						'woocommerce-services',
+						'woocommerce-payments',
+						'mailchimp-for-woocommerce',
+						'creative-mail-by-constant-contact',
+						'facebook-for-woocommerce',
+						'google-listings-and-ads',
+						'mailpoet',
+					),
+					'type' => 'string',
+				),
+			),
+			'theme'               => array(
+				'type'              => 'string',
+				'description'       => __( 'Selected store theme.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'sanitize_callback' => 'sanitize_title_with_dashes',
+				'validate_callback' => 'rest_validate_request_arg',
+			),
+			'setup_client'        => array(
+				'type'              => 'boolean',
+				'description'       => __( 'Whether or not this store was setup for a client.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+			),
+			'wccom_connected'     => array(
+				'type'              => 'boolean',
+				'description'       => __( 'Whether or not the store was connected to WooCommerce.com during the extension flow.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+			),
+			'is_agree_marketing'  => array(
+				'type'              => 'boolean',
+				'description'       => __( 'Whether or not this store agreed to receiving marketing contents from WooCommerce.com.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => 'rest_validate_request_arg',
+			),
+			'store_email'         => array(
+				'type'              => 'string',
+				'description'       => __( 'Store email address.', 'woocommerce' ),
+				'context'           => array( 'view' ),
+				'readonly'          => true,
+				'validate_callback' => array( __CLASS__, 'rest_validate_marketing_email' ),
+			),
+		);
+
+		return apply_filters( 'woocommerce_rest_onboarding_profile_properties', $properties );
+	}
+
+	/**
+	 * Optionally validates email if user agreed to marketing or if email is not empty.
+	 *
+	 * @param mixed           $value Email value.
+	 * @param WP_REST_Request $request Request object.
+	 * @param string          $param Parameter name.
+	 * @return true|WP_Error
+	 */
+	public static function rest_validate_marketing_email( $value, $request, $param ) {
+		$is_agree_marketing = $request->get_param( 'is_agree_marketing' );
+		if (
+			( $is_agree_marketing || ! empty( $value ) ) &&
+			! is_email( $value ) ) {
+			return new \WP_Error( 'rest_invalid_email', __( 'Invalid email address', 'woocommerce' ) );
+		};
+		return true;
+	}
+
+	/**
+	 * Get the schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		// Unset properties used for collection params.
+		$properties = self::get_profile_properties();
+		foreach ( $properties as $key => $property ) {
+			unset( $properties[ $key ]['default'] );
+			unset( $properties[ $key ]['items'] );
+			unset( $properties[ $key ]['validate_callback'] );
+			unset( $properties[ $key ]['sanitize_callback'] );
+		}
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'onboarding_profile',
+			'type'       => 'object',
+			'properties' => $properties,
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		// Unset properties used for item schema.
+		$params = self::get_profile_properties();
+		foreach ( $params as $key => $param ) {
+			unset( $params[ $key ]['context'] );
+			unset( $params[ $key ]['readonly'] );
+		}
+
+		$params['context'] = $this->get_context_param( array( 'default' => 'view' ) );
+
+		return apply_filters( 'woocommerce_rest_onboarding_profile_collection_params', $params );
+	}
+}

packages/woocommerce-admin/src/API/OnboardingTasks.php

@@ -0,0 +1,952 @@
+<?php
+/**
+ * REST API Onboarding Tasks Controller
+ *
+ * Handles requests to complete various onboarding tasks.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+use Automattic\WooCommerce\Admin\Features\Onboarding;
+use Automattic\WooCommerce\Admin\Features\OnboardingTasks\Init as OnboardingTasksFeature;
+use Automattic\WooCommerce\Admin\Features\OnboardingTasks\TaskLists;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Onboarding Tasks Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class OnboardingTasks extends \WC_REST_Data_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'onboarding/tasks';
+
+	/**
+	 * Duration to milisecond mapping.
+	 *
+	 * @var string
+	 */
+	protected $duration_to_ms = array(
+		'day'  => DAY_IN_SECONDS * 1000,
+		'hour' => HOUR_IN_SECONDS * 1000,
+		'week' => WEEK_IN_SECONDS * 1000,
+	);
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/import_sample_products',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::CREATABLE,
+					'callback'            => array( $this, 'import_sample_products' ),
+					'permission_callback' => array( $this, 'create_products_permission_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/create_homepage',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::CREATABLE,
+					'callback'            => array( $this, 'create_homepage' ),
+					'permission_callback' => array( $this, 'create_pages_permission_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/status',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_status' ),
+					'permission_callback' => array( $this, 'get_status_permission_check' ),
+				),
+				'schema' => array( $this, 'get_status_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/create_product_from_template',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::CREATABLE,
+					'callback'            => array( $this, 'create_product_from_template' ),
+					'permission_callback' => array( $this, 'create_products_permission_check' ),
+					'args'                => array_merge(
+						$this->get_endpoint_args_for_item_schema( \WP_REST_Server::CREATABLE ),
+						array(
+							'template_name' => array(
+								'required'    => true,
+								'type'        => 'string',
+								'description' => __( 'Product template name.', 'woocommerce' ),
+							),
+						)
+					),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_tasks' ),
+					'permission_callback' => array( $this, 'get_tasks_permission_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<id>[a-z0-9_\-]+)/hide',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'hide_task_list' ),
+					'permission_callback' => array( $this, 'hide_task_list_permission_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<id>[a-z0-9_\-]+)/dismiss',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'dismiss_task' ),
+					'permission_callback' => array( $this, 'get_tasks_permission_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<id>[a-z0-9_\-]+)/undo_dismiss',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'undo_dismiss_task' ),
+					'permission_callback' => array( $this, 'get_tasks_permission_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<id>[a-z0-9_-]+)/snooze',
+			array(
+				'args'   => array(
+					'duration'     => array(
+						'description'       => __( 'Time period to snooze the task.', 'woocommerce' ),
+						'type'              => 'string',
+						'validate_callback' => function( $param, $request, $key ) {
+							return in_array( $param, array_keys( $this->duration_to_ms ), true );
+						},
+					),
+					'task_list_id' => array(
+						'description' => __( 'Optional parameter to query specific task list.', 'woocommerce' ),
+						'type'        => 'string',
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::CREATABLE,
+					'callback'            => array( $this, 'snooze_task' ),
+					'permission_callback' => array( $this, 'snooze_task_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<id>[a-z0-9_\-]+)/undo_snooze',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'undo_snooze_task' ),
+					'permission_callback' => array( $this, 'snooze_task_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check if a given request has access to create a product.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function create_products_permission_check( $request ) {
+		if ( ! wc_rest_check_post_permissions( 'product', 'create' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_create', __( 'Sorry, you are not allowed to create resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if a given request has access to create a product.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function create_pages_permission_check( $request ) {
+		if ( ! wc_rest_check_post_permissions( 'page', 'create' ) || ! current_user_can( 'manage_options' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_create', __( 'Sorry, you are not allowed to create new pages.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if a given request has access to get onboarding tasks status.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_status_permission_check( $request ) {
+		if ( ! current_user_can( 'manage_options' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_create', __( 'Sorry, you are not allowed to retrieve onboarding status.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if a given request has access to manage woocommerce.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_tasks_permission_check( $request ) {
+		if ( ! current_user_can( 'manage_woocommerce' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_create', __( 'Sorry, you are not allowed to retrieve onboarding tasks.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if a given request has permission to hide task lists.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function hide_task_list_permission_check( $request ) {
+		if ( ! current_user_can( 'manage_woocommerce' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_update', __( 'Sorry, you are not allowed to hide task lists.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if a given request has access to manage woocommerce.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function snooze_task_permissions_check( $request ) {
+		if ( ! current_user_can( 'manage_woocommerce' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_create', __( 'Sorry, you are not allowed to snooze onboarding tasks.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Import sample products from given CSV path.
+	 *
+	 * @param  string $csv_file CSV file path.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public static function import_sample_products_from_csv( $csv_file ) {
+		include_once WC_ABSPATH . 'includes/import/class-wc-product-csv-importer.php';
+
+		if ( file_exists( $csv_file ) && class_exists( 'WC_Product_CSV_Importer' ) ) {
+			// Override locale so we can return mappings from WooCommerce in English language stores.
+			add_filter( 'locale', '__return_false', 9999 );
+			$importer_class = apply_filters( 'woocommerce_product_csv_importer_class', 'WC_Product_CSV_Importer' );
+			$args           = array(
+				'parse'   => true,
+				'mapping' => self::get_header_mappings( $csv_file ),
+			);
+			$args           = apply_filters( 'woocommerce_product_csv_importer_args', $args, $importer_class );
+
+			$importer = new $importer_class( $csv_file, $args );
+			$import   = $importer->import();
+			return $import;
+		} else {
+			return new \WP_Error( 'woocommerce_rest_import_error', __( 'Sorry, the sample products data file was not found.', 'woocommerce' ) );
+		}
+	}
+
+	/**
+	 * Import sample products from WooCommerce sample CSV.
+	 *
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public static function import_sample_products() {
+		$sample_csv_file = WC_ABSPATH . 'sample-data/sample_products.csv';
+
+		$import = self::import_sample_products_from_csv( $sample_csv_file );
+		return rest_ensure_response( $import );
+	}
+
+
+	/**
+	 * Creates a product from a template name passed in through the template_name param.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response|WP_Error
+	 */
+	public static function create_product_from_template( $request ) {
+		$template_name = $request->get_param( 'template_name' );
+		$template_path = __DIR__ . '/Templates/' . $template_name . '_product.csv';
+		$template_path = apply_filters( 'woocommerce_product_template_csv_file_path', $template_path, $template_name );
+
+		$import = self::import_sample_products_from_csv( $template_path );
+
+		if ( is_wp_error( $import ) || 0 === count( $import['imported'] ) ) {
+			return new \WP_Error(
+				'woocommerce_rest_product_creation_error',
+				/* translators: %s is template name */
+				__( 'Sorry, creating the product with template failed.', 'woocommerce' ),
+				array( 'status' => 500 )
+			);
+		}
+		$product = wc_get_product( $import['imported'][0] );
+		$product->set_status( 'auto-draft' );
+		$product->save();
+
+		return rest_ensure_response(
+			array(
+				'id' => $product->get_id(),
+			)
+		);
+	}
+
+
+	/**
+	 * Get header mappings from CSV columns.
+	 *
+	 * @param string $file File path.
+	 * @return array Mapped headers.
+	 */
+	public static function get_header_mappings( $file ) {
+		include_once WC_ABSPATH . 'includes/admin/importers/mappings/mappings.php';
+
+		$importer_class  = apply_filters( 'woocommerce_product_csv_importer_class', 'WC_Product_CSV_Importer' );
+		$importer        = new $importer_class( $file, array() );
+		$raw_headers     = $importer->get_raw_keys();
+		$default_columns = wc_importer_default_english_mappings( array() );
+		$special_columns = wc_importer_default_special_english_mappings( array() );
+
+		$headers = array();
+		foreach ( $raw_headers as $key => $field ) {
+			$index             = $field;
+			$headers[ $index ] = $field;
+
+			if ( isset( $default_columns[ $field ] ) ) {
+				$headers[ $index ] = $default_columns[ $field ];
+			} else {
+				foreach ( $special_columns as $regex => $special_key ) {
+					if ( preg_match( self::sanitize_special_column_name_regex( $regex ), $field, $matches ) ) {
+						$headers[ $index ] = $special_key . $matches[1];
+						break;
+					}
+				}
+			}
+		}
+
+		return $headers;
+	}
+
+	/**
+	 * Sanitize special column name regex.
+	 *
+	 * @param  string $value Raw special column name.
+	 * @return string
+	 */
+	public static function sanitize_special_column_name_regex( $value ) {
+		return '/' . str_replace( array( '%d', '%s' ), '(.*)', trim( quotemeta( $value ) ) ) . '/';
+	}
+
+	/**
+	 * Returns a valid cover block with an image, if one exists, or background as a fallback.
+	 *
+	 * @param  array $image Image to use for the cover block. Should contain a media ID and image URL.
+	 * @return string Block content.
+	 */
+	private static function get_homepage_cover_block( $image ) {
+		$shop_url = get_permalink( wc_get_page_id( 'shop' ) );
+		if ( ! empty( $image['url'] ) && ! empty( $image['id'] ) ) {
+			return '<!-- wp:cover {"url":"' . esc_url( $image['url'] ) . '","id":' . intval( $image['id'] ) . ',"dimRatio":0} -->
+			<div class="wp-block-cover" style="background-image:url(' . esc_url( $image['url'] ) . ')"><div class="wp-block-cover__inner-container"><!-- wp:paragraph {"align":"center","placeholder":"' . __( 'Write title…', 'woocommerce' ) . '","textColor":"white","fontSize":"large"} -->
+			<p class="has-text-align-center has-large-font-size">' . __( 'Welcome to the store', 'woocommerce' ) . '</p>
+			<!-- /wp:paragraph -->
+
+			<!-- wp:paragraph {"align":"center","textColor":"white"} -->
+			<p class="has-text-color has-text-align-center">' . __( 'Write a short welcome message here', 'woocommerce' ) . '</p>
+			<!-- /wp:paragraph -->
+
+			<!-- wp:button {"align":"center"} -->
+			<div class="wp-block-button aligncenter"><a href="' . esc_url( $shop_url ) . '" class="wp-block-button__link">' . __( 'Go shopping', 'woocommerce' ) . '</a></div>
+			<!-- /wp:button --></div></div>
+			<!-- /wp:cover -->';
+		}
+
+		return '<!-- wp:cover {"dimRatio":0} -->
+		<div class="wp-block-cover"><div class="wp-block-cover__inner-container"><!-- wp:paragraph {"align":"center","placeholder":"' . __( 'Write title…', 'woocommerce' ) . '","textColor":"white","fontSize":"large"} -->
+		<p class="has-text-color has-text-align-center has-large-font-size">' . __( 'Welcome to the store', 'woocommerce' ) . '</p>
+		<!-- /wp:paragraph -->
+
+		<!-- wp:paragraph {"align":"center","textColor":"white"} -->
+		<p class="has-text-color has-text-align-center">' . __( 'Write a short welcome message here', 'woocommerce' ) . '</p>
+		<!-- /wp:paragraph -->
+
+		<!-- wp:button {"align":"center"} -->
+		<div class="wp-block-button aligncenter"><a href="' . esc_url( $shop_url ) . '" class="wp-block-button__link">' . __( 'Go shopping', 'woocommerce' ) . '</a></div>
+		<!-- /wp:button --></div></div>
+		<!-- /wp:cover -->';
+	}
+
+	/**
+	 * Returns a valid media block with an image, if one exists, or a uninitialized media block the user can set.
+	 *
+	 * @param  array  $image Image to use for the cover block. Should contain a media ID and image URL.
+	 * @param  string $align If the image should be aligned to the left or right.
+	 * @return string Block content.
+	 */
+	private static function get_homepage_media_block( $image, $align = 'left' ) {
+		$media_position = 'right' === $align ? '"mediaPosition":"right",' : '';
+		$css_class      = 'right' === $align ? ' has-media-on-the-right' : '';
+
+		if ( ! empty( $image['url'] ) && ! empty( $image['id'] ) ) {
+			return '<!-- wp:media-text {' . $media_position . '"mediaId":' . intval( $image['id'] ) . ',"mediaType":"image"} -->
+			<div class="wp-block-media-text alignwide' . $css_class . '""><figure class="wp-block-media-text__media"><img src="' . esc_url( $image['url'] ) . '" alt="" class="wp-image-' . intval( $image['id'] ) . '"/></figure><div class="wp-block-media-text__content"><!-- wp:paragraph {"placeholder":"' . __( 'Content…', 'woocommerce' ) . '","fontSize":"large"} -->
+			<p class="has-large-font-size"></p>
+			<!-- /wp:paragraph --></div></div>
+			<!-- /wp:media-text -->';
+		}
+
+		return '<!-- wp:media-text {' . $media_position . '} -->
+		<div class="wp-block-media-text alignwide' . $css_class . '"><figure class="wp-block-media-text__media"></figure><div class="wp-block-media-text__content"><!-- wp:paragraph {"placeholder":"' . __( 'Content…', 'woocommerce' ) . '","fontSize":"large"} -->
+		<p class="has-large-font-size"></p>
+		<!-- /wp:paragraph --></div></div>
+		<!-- /wp:media-text -->';
+	}
+
+	/**
+	 * Returns a homepage template to be inserted into a post. A different template will be used depending on the number of products.
+	 *
+	 * @param int $post_id ID of the homepage template.
+	 * @return string Template contents.
+	 */
+	private static function get_homepage_template( $post_id ) {
+		$products = wp_count_posts( 'product' );
+		if ( $products->publish >= 4 ) {
+			$images   = self::sideload_homepage_images( $post_id, 1 );
+			$image_1  = ! empty( $images[0] ) ? $images[0] : '';
+			$template = self::get_homepage_cover_block( $image_1 ) . '
+				<!-- wp:heading {"align":"center"} -->
+				<h2 style="text-align:center">' . __( 'Shop by Category', 'woocommerce' ) . '</h2>
+				<!-- /wp:heading -->
+				<!-- wp:shortcode -->
+				[product_categories number="0" parent="0"]
+				<!-- /wp:shortcode -->
+				<!-- wp:heading {"align":"center"} -->
+				<h2 style="text-align:center">' . __( 'New In', 'woocommerce' ) . '</h2>
+				<!-- /wp:heading -->
+				<!-- wp:woocommerce/product-new {"columns":4} /-->
+				<!-- wp:heading {"align":"center"} -->
+				<h2 style="text-align:center">' . __( 'Fan Favorites', 'woocommerce' ) . '</h2>
+				<!-- /wp:heading -->
+				<!-- wp:woocommerce/product-top-rated {"columns":4} /-->
+				<!-- wp:heading {"align":"center"} -->
+				<h2 style="text-align:center">' . __( 'On Sale', 'woocommerce' ) . '</h2>
+				<!-- /wp:heading -->
+				<!-- wp:woocommerce/product-on-sale {"columns":4} /-->
+				<!-- wp:heading {"align":"center"} -->
+				<h2 style="text-align:center">' . __( 'Best Sellers', 'woocommerce' ) . '</h2>
+				<!-- /wp:heading -->
+				<!-- wp:woocommerce/product-best-sellers {"columns":4} /-->
+			';
+
+			/**
+			 * Modify the template/content of the default homepage.
+			 *
+			 * @param string $template The default homepage template.
+			 */
+			return apply_filters( 'woocommerce_admin_onboarding_homepage_template', $template );
+		}
+
+		$images   = self::sideload_homepage_images( $post_id, 3 );
+		$image_1  = ! empty( $images[0] ) ? $images[0] : '';
+		$image_2  = ! empty( $images[1] ) ? $images[1] : '';
+		$image_3  = ! empty( $images[2] ) ? $images[2] : '';
+		$template = self::get_homepage_cover_block( $image_1 ) . '
+		<!-- wp:heading {"align":"center"} -->
+		<h2 style="text-align:center">' . __( 'New Products', 'woocommerce' ) . '</h2>
+		<!-- /wp:heading -->
+
+		<!-- wp:woocommerce/product-new /--> ' .
+
+		self::get_homepage_media_block( $image_1, 'right' ) .
+		self::get_homepage_media_block( $image_2, 'left' ) .
+		self::get_homepage_media_block( $image_3, 'right' ) . '
+
+		<!-- wp:woocommerce/featured-product /-->';
+
+		/** This filter is documented in src/API/OnboardingTasks.php. */
+		return apply_filters( 'woocommerce_admin_onboarding_homepage_template', $template );
+	}
+
+	/**
+	 * Gets the possible industry images from the plugin folder for sideloading. If an image doesn't exist, other.jpg is used a fallback.
+	 *
+	 * @return array An array of images by industry.
+	 */
+	private static function get_available_homepage_images() {
+		$industry_images = array();
+		$industries      = Onboarding::get_allowed_industries();
+		foreach ( $industries as $industry_slug => $label ) {
+			$industry_images[ $industry_slug ] = apply_filters( 'woocommerce_admin_onboarding_industry_image', plugins_url( 'images/onboarding/other-small.jpg', WC_ADMIN_PLUGIN_FILE ), $industry_slug );
+		}
+		return $industry_images;
+	}
+
+	/**
+	 * Uploads a number of images to a homepage template, depending on the selected industry from the profile wizard.
+	 *
+	 * @param  int $post_id ID of the homepage template.
+	 * @param  int $number_of_images The number of images that should be sideloaded (depending on how many media slots are in the template).
+	 * @return array An array of images that have been attached to the post.
+	 */
+	private static function sideload_homepage_images( $post_id, $number_of_images ) {
+		$profile            = get_option( Onboarding::PROFILE_DATA_OPTION, array() );
+		$images_to_sideload = array();
+		$available_images   = self::get_available_homepage_images();
+
+		require_once ABSPATH . 'wp-admin/includes/image.php';
+		require_once ABSPATH . 'wp-admin/includes/file.php';
+		require_once ABSPATH . 'wp-admin/includes/media.php';
+
+		if ( ! empty( $profile['industry'] ) ) {
+			foreach ( $profile['industry'] as $selected_industry ) {
+				if ( is_string( $selected_industry ) ) {
+					$industry_slug = $selected_industry;
+				} elseif ( is_array( $selected_industry ) && ! empty( $selected_industry['slug'] ) ) {
+					$industry_slug = $selected_industry['slug'];
+				} else {
+					continue;
+				}
+				// Capture the first industry for use in our minimum images logic.
+				$first_industry       = isset( $first_industry ) ? $first_industry : $industry_slug;
+				$images_to_sideload[] = ! empty( $available_images[ $industry_slug ] ) ? $available_images[ $industry_slug ] : $available_images['other'];
+			}
+		}
+
+		// Make sure we have at least {$number_of_images} images.
+		if ( count( $images_to_sideload ) < $number_of_images ) {
+			for ( $i = count( $images_to_sideload ); $i < $number_of_images; $i++ ) {
+				// Fill up missing image slots with the first selected industry, or other.
+				$industry             = isset( $first_industry ) ? $first_industry : 'other';
+				$images_to_sideload[] = empty( $available_images[ $industry ] ) ? $available_images['other'] : $available_images[ $industry ];
+			}
+		}
+
+		$already_sideloaded = array();
+		$images_for_post    = array();
+		foreach ( $images_to_sideload as $image ) {
+			// Avoid uploading two of the same image, if an image is repeated.
+			if ( ! empty( $already_sideloaded[ $image ] ) ) {
+				$images_for_post[] = $already_sideloaded[ $image ];
+				continue;
+			}
+
+			$sideload_id = \media_sideload_image( $image, $post_id, null, 'id' );
+			if ( ! is_wp_error( $sideload_id ) ) {
+				$sideload_url                 = wp_get_attachment_url( $sideload_id );
+				$already_sideloaded[ $image ] = array(
+					'id'  => $sideload_id,
+					'url' => $sideload_url,
+				);
+				$images_for_post[]            = $already_sideloaded[ $image ];
+			}
+		}
+
+		return $images_for_post;
+	}
+
+	/**
+	 * Create a homepage from a template.
+	 *
+	 * @return WP_Error|array
+	 */
+	public static function create_homepage() {
+		$post_id = wp_insert_post(
+			array(
+				'post_title'   => __( 'Homepage', 'woocommerce' ),
+				'post_type'    => 'page',
+				'post_status'  => 'publish',
+				'post_content' => '', // Template content is updated below, so images can be attached to the post.
+			)
+		);
+
+		if ( ! is_wp_error( $post_id ) && 0 < $post_id ) {
+
+			$template = self::get_homepage_template( $post_id );
+			wp_update_post(
+				array(
+					'ID'           => $post_id,
+					'post_content' => $template,
+				)
+			);
+
+			update_option( 'show_on_front', 'page' );
+			update_option( 'page_on_front', $post_id );
+			update_option( 'woocommerce_onboarding_homepage_post_id', $post_id );
+
+			// Use the full width template on stores using Storefront.
+			if ( 'storefront' === get_stylesheet() ) {
+				update_post_meta( $post_id, '_wp_page_template', 'template-fullwidth.php' );
+			}
+
+			return array(
+				'status'         => 'success',
+				'message'        => __( 'Homepage created', 'woocommerce' ),
+				'post_id'        => $post_id,
+				'edit_post_link' => htmlspecialchars_decode( get_edit_post_link( $post_id ) ),
+			);
+		} else {
+			return $post_id;
+		}
+	}
+
+	/**
+	 * Get the status endpoint schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_status_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'Onboarding Task Status',
+			'type'       => 'object',
+			'properties' => array(
+				'automatedTaxSupportedCountries' => array(
+					'type'        => 'array',
+					'description' => __( 'Country codes that support Automated Taxes.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type' => 'string',
+					),
+				),
+				'hasHomepage'                    => array(
+					'type'        => 'boolean',
+					'description' => __( 'If the store has a homepage created.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'hasPaymentGateway'              => array(
+					'type'        => 'boolean',
+					'description' => __( 'If the store has an enabled payment gateway.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'hasPhysicalProducts'            => array(
+					'type'        => 'boolean',
+					'description' => __( 'If the store has any physical (non-virtual) products.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'hasProducts'                    => array(
+					'type'        => 'boolean',
+					'description' => __( 'If the store has any products.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'isTaxComplete'                  => array(
+					'type'        => 'boolean',
+					'description' => __( 'If the tax step has been completed.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'shippingZonesCount'             => array(
+					'type'        => 'number',
+					'description' => __( 'The number of shipping zones configured for the store.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'taxJarActivated'                => array(
+					'type'        => 'boolean',
+					'description' => __( 'If the store has the TaxJar extension active.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'themeMods'                      => array(
+					'type'        => 'object',
+					'description' => __( 'Active theme modifications.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'wcPayIsConnected'               => array(
+					'type'        => 'boolean',
+					'description' => __( 'If the store is using WooCommerce Payments.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get various onboarding task statuses.
+	 *
+	 * @return WP_Error|array
+	 */
+	public function get_status() {
+		$status = OnboardingTasksFeature::get_settings();
+
+		return rest_ensure_response( $status );
+	}
+
+	/**
+	 * Get the onboarding tasks.
+	 *
+	 * @return WP_REST_Response|WP_Error
+	 */
+	public function get_tasks() {
+		$lists = TaskLists::get_lists();
+		$json  = array_map(
+			function( $list ) {
+				return $list->get_json();
+			},
+			$lists
+		);
+		return rest_ensure_response( array_values( apply_filters( 'woocommerce_admin_onboarding_tasks', $json ) ) );
+	}
+
+	/**
+	 * Dismiss a single task.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function dismiss_task( $request ) {
+		$id = $request->get_param( 'id' );
+
+		$is_dismissable = false;
+
+		$task = TaskLists::get_task( $id );
+
+		if ( $task && isset( $task['isDismissable'] ) && $task['isDismissable'] ) {
+			$is_dismissable = true;
+		}
+
+		if ( ! $is_dismissable ) {
+			return new \WP_Error(
+				'woocommerce_rest_invalid_task',
+				__( 'Sorry, no dismissable task with that ID was found.', 'woocommerce' ),
+				array(
+					'status' => 404,
+				)
+			);
+		}
+
+		$dismissed   = get_option( 'woocommerce_task_list_dismissed_tasks', array() );
+		$dismissed[] = $id;
+		$update      = update_option( 'woocommerce_task_list_dismissed_tasks', array_unique( $dismissed ) );
+
+		if ( $update ) {
+			wc_admin_record_tracks_event( 'tasklist_dismiss_task', array( 'task_name' => $id ) );
+		}
+
+		$task = TaskLists::get_task( $id );
+
+		return rest_ensure_response( $task );
+	}
+
+	/**
+	 * Undo dismissal of a single task.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function undo_dismiss_task( $request ) {
+		$id = $request->get_param( 'id' );
+
+		$dismissed = get_option( 'woocommerce_task_list_dismissed_tasks', array() );
+		$dismissed = array_diff( $dismissed, array( $id ) );
+		$update    = update_option( 'woocommerce_task_list_dismissed_tasks', $dismissed );
+
+		if ( $update ) {
+			wc_admin_record_tracks_event( 'tasklist_undo_dismiss_task', array( 'task_name' => $id ) );
+		}
+
+		$task = TaskLists::get_task( $id );
+
+		return rest_ensure_response( $task );
+	}
+
+	/**
+	 * Snooze an onboarding task.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 *
+	 * @return WP_REST_Response|WP_Error
+	 */
+	public function snooze_task( $request ) {
+		$task_id         = $request->get_param( 'id' );
+		$task_list_id    = $request->get_param( 'task_list_id' );
+		$snooze_duration = $request->get_param( 'duration' );
+
+		$is_snoozeable = false;
+
+		$snooze_task = TaskLists::get_task( $task_id, $task_list_id );
+
+		if ( $snooze_task && isset( $snooze_task['isSnoozeable'] ) && $snooze_task['isSnoozeable'] ) {
+			$is_snoozeable = true;
+		}
+
+		if ( ! $is_snoozeable ) {
+			return new \WP_Error(
+				'woocommerce_tasks_invalid_task',
+				__( 'Sorry, no snoozeable task with that ID was found.', 'woocommerce' ),
+				array(
+					'status' => 404,
+				)
+			);
+		}
+
+		$snooze_option = get_option( 'woocommerce_task_list_remind_me_later_tasks', array() );
+		$duration      = is_null( $snooze_duration ) ? 'day' : $snooze_duration;
+		$snoozed_until = $this->duration_to_ms[ $duration ] + ( time() * 1000 );
+
+		$snooze_option[ $task_id ] = $snoozed_until;
+		$update                    = update_option( 'woocommerce_task_list_remind_me_later_tasks', $snooze_option );
+
+		if ( $update ) {
+			wc_admin_record_tracks_event( 'tasklist_remindmelater_task', array( 'task_name' => $task_id ) );
+			$snooze_task['isSnoozed']    = true;
+			$snooze_task['snoozedUntil'] = $snoozed_until;
+		}
+
+		return rest_ensure_response( $snooze_task );
+	}
+
+	/**
+	 * Undo snooze of a single task.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function undo_snooze_task( $request ) {
+		$id = $request->get_param( 'id' );
+
+		$snoozed = get_option( 'woocommerce_task_list_remind_me_later_tasks', array() );
+
+		if ( ! isset( $snoozed[ $id ] ) ) {
+			return new \WP_Error(
+				'woocommerce_tasks_invalid_task',
+				__( 'Sorry, no snoozed task with that ID was found.', 'woocommerce' ),
+				array(
+					'status' => 404,
+				)
+			);
+		}
+
+		unset( $snoozed[ $id ] );
+
+		$update = update_option( 'woocommerce_task_list_remind_me_later_tasks', $snoozed );
+
+		if ( $update ) {
+			wc_admin_record_tracks_event( 'tasklist_undo_remindmelater_task', array( 'task_name' => $id ) );
+		}
+
+		return rest_ensure_response( TaskLists::get_task( $id ) );
+	}
+
+	/**
+	 * Hide a task list.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 *
+	 * @return WP_REST_Response|WP_Error
+	 */
+	public function hide_task_list( $request ) {
+		$id        = $request->get_param( 'id' );
+		$task_list = TaskLists::get_list( $id );
+
+		if ( ! $task_list ) {
+			return new \WP_Error(
+				'woocommerce_tasks_invalid_task_list',
+				__( 'Sorry, that task list was not found', 'woocommerce' ),
+				array(
+					'status' => 404,
+				)
+			);
+		}
+
+		$update = $task_list->hide();
+		$json   = $task_list->get_json();
+
+		if ( $update ) {
+			$completed_task_count = array_reduce(
+				$json['tasks'],
+				function( $total, $task ) {
+					return $task['isComplete'] ? $total + 1 : $total;
+				},
+				0
+			);
+
+			wc_admin_record_tracks_event(
+				$id . '_completed',
+				array(
+					'action'                => 'remove_card',
+					'completed_task_count'  => $completed_task_count,
+					'incomplete_task_count' => count( $json['tasks'] ) - $completed_task_count,
+				)
+			);
+		}
+
+		return rest_ensure_response( $json );
+	}
+
+}

packages/woocommerce-admin/src/API/OnboardingThemes.php

@@ -0,0 +1,220 @@
+<?php
+/**
+ * REST API Onboarding Themes Controller
+ *
+ * Handles requests to install and activate themes.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+use Automattic\WooCommerce\Admin\Features\Onboarding;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Onboarding Themes Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class OnboardingThemes extends \WC_REST_Data_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'onboarding/themes';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/install',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'install_theme' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/activate',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'activate_theme' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check if a given request has access to manage themes.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function update_item_permissions_check( $request ) {
+		if ( ! current_user_can( 'install_themes' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_update', __( 'Sorry, you cannot manage themes.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+		return true;
+	}
+
+	/**
+	 * Installs the requested theme.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|array Theme installation status.
+	 */
+	public function install_theme( $request ) {
+		$allowed_themes = Onboarding::get_allowed_themes();
+		$theme          = sanitize_text_field( $request['theme'] );
+
+		if ( ! in_array( $theme, $allowed_themes, true ) ) {
+			return new \WP_Error( 'woocommerce_rest_invalid_theme', __( 'Invalid theme.', 'woocommerce' ), 404 );
+		}
+
+		$installed_themes = wp_get_themes();
+
+		if ( in_array( $theme, array_keys( $installed_themes ), true ) ) {
+			return( array(
+				'slug'   => $theme,
+				'name'   => $installed_themes[ $theme ]->get( 'Name' ),
+				'status' => 'success',
+			) );
+		}
+
+		include_once ABSPATH . '/wp-admin/includes/admin.php';
+		include_once ABSPATH . '/wp-admin/includes/theme-install.php';
+		include_once ABSPATH . '/wp-admin/includes/theme.php';
+		include_once ABSPATH . '/wp-admin/includes/class-wp-upgrader.php';
+		include_once ABSPATH . '/wp-admin/includes/class-theme-upgrader.php';
+
+		$api = themes_api(
+			'theme_information',
+			array(
+				'slug'   => $theme,
+				'fields' => array(
+					'sections' => false,
+				),
+			)
+		);
+
+		if ( is_wp_error( $api ) ) {
+			return new \WP_Error(
+				'woocommerce_rest_theme_install',
+				sprintf(
+					/* translators: %s: theme slug (example: woocommerce-services) */
+					__( 'The requested theme `%s` could not be installed. Theme API call failed.', 'woocommerce' ),
+					$theme
+				),
+				500
+			);
+		}
+
+		$upgrader = new \Theme_Upgrader( new \Automatic_Upgrader_Skin() );
+		$result   = $upgrader->install( $api->download_link );
+
+		if ( is_wp_error( $result ) || is_null( $result ) ) {
+			return new \WP_Error(
+				'woocommerce_rest_theme_install',
+				sprintf(
+					/* translators: %s: theme slug (example: woocommerce-services) */
+					__( 'The requested theme `%s` could not be installed.', 'woocommerce' ),
+					$theme
+				),
+				500
+			);
+		}
+
+		return array(
+			'slug'   => $theme,
+			'name'   => $api->name,
+			'status' => 'success',
+		);
+	}
+
+	/**
+	 * Activate the requested theme.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|array Theme activation status.
+	 */
+	public function activate_theme( $request ) {
+		$allowed_themes = Onboarding::get_allowed_themes();
+		$theme          = sanitize_text_field( $request['theme'] );
+		if ( ! in_array( $theme, $allowed_themes, true ) ) {
+			return new \WP_Error( 'woocommerce_rest_invalid_theme', __( 'Invalid theme.', 'woocommerce' ), 404 );
+		}
+
+		require_once ABSPATH . 'wp-admin/includes/theme.php';
+
+		$installed_themes = wp_get_themes();
+
+		if ( ! in_array( $theme, array_keys( $installed_themes ), true ) ) {
+			/* translators: %s: theme slug (example: woocommerce-services) */
+			return new \WP_Error( 'woocommerce_rest_invalid_theme', sprintf( __( 'Invalid theme %s.', 'woocommerce' ), $theme ), 404 );
+		}
+
+		$result = switch_theme( $theme );
+		if ( ! is_null( $result ) ) {
+			return new \WP_Error( 'woocommerce_rest_invalid_theme', sprintf( __( 'The requested theme could not be activated.', 'woocommerce' ), $theme ), 500 );
+		}
+
+		return( array(
+			'slug'   => $theme,
+			'name'   => $installed_themes[ $theme ]->get( 'Name' ),
+			'status' => 'success',
+		) );
+	}
+
+	/**
+	 * Get the schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'onboarding_theme',
+			'type'       => 'object',
+			'properties' => array(
+				'slug'   => array(
+					'description' => __( 'Theme slug.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'name'   => array(
+					'description' => __( 'Theme name.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'status' => array(
+					'description' => __( 'Theme status.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+}

packages/woocommerce-admin/src/API/Options.php

@@ -0,0 +1,210 @@
+<?php
+/**
+ * REST API Options Controller
+ *
+ * Handles requests to get and update options in the wp_options table.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Options Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class Options extends \WC_REST_Data_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'options';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_options' ),
+					'permission_callback' => array( $this, 'get_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'update_options' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check if a given request has access to get options.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_item_permissions_check( $request ) {
+		$params = explode( ',', $request['options'] );
+
+		if ( ! isset( $request['options'] ) || ! is_array( $params ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'You must supply an array of options.', 'woocommerce' ), 500 );
+		}
+
+		foreach ( $params as $option ) {
+			if ( ! $this->user_has_permission( $option, $request ) ) {
+				return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot view these options.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if the user has permission given an option name.
+	 *
+	 * @param  string          $option Option name.
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return boolean
+	 */
+	public function user_has_permission( $option, $request ) {
+		$permissions = $this->get_option_permissions( $request );
+
+		if ( isset( $permissions[ $option ] ) ) {
+			return $permissions[ $option ];
+		}
+
+		return current_user_can( 'manage_options' );
+	}
+
+	/**
+	 * Check if a given request has access to update options.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function update_item_permissions_check( $request ) {
+		$params = $request->get_json_params();
+
+		if ( ! is_array( $params ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_update', __( 'You must supply an array of options and values.', 'woocommerce' ), 500 );
+		}
+
+		foreach ( $params as $option_name => $option_value ) {
+			if ( ! $this->user_has_permission( $option_name, $request ) ) {
+				return new \WP_Error( 'woocommerce_rest_cannot_update', __( 'Sorry, you cannot manage these options.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Get an array of options and respective permissions for the current user.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return array
+	 */
+	public function get_option_permissions( $request ) {
+		$permissions = array(
+			'theme_mods_' . get_stylesheet()               => current_user_can( 'edit_theme_options' ),
+			'woocommerce_setup_jetpack_opted_in'           => current_user_can( 'manage_woocommerce' ),
+			'woocommerce_stripe_settings'                  => current_user_can( 'manage_woocommerce' ),
+			'woocommerce-ppcp-settings'                    => current_user_can( 'manage_woocommerce' ),
+			'woocommerce_ppcp-gateway_setting'             => current_user_can( 'manage_woocommerce' ),
+			'woocommerce_demo_store'                       => current_user_can( 'manage_woocommerce' ),
+			'woocommerce_demo_store_notice'                => current_user_can( 'manage_woocommerce' ),
+			'woocommerce_ces_tracks_queue'                 => current_user_can( 'manage_woocommerce' ),
+			'woocommerce_navigation_intro_modal_dismissed' => current_user_can( 'manage_woocommerce' ),
+		);
+
+		return apply_filters( 'woocommerce_rest_api_option_permissions', $permissions, $request );
+	}
+
+	/**
+	 * Gets an array of options and respective values.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return array Options object with option values.
+	 */
+	public function get_options( $request ) {
+		$params  = explode( ',', $request['options'] );
+		$options = array();
+
+		if ( ! is_array( $params ) ) {
+			return array();
+		}
+
+		foreach ( $params as $option ) {
+			$options[ $option ] = get_option( $option );
+		}
+
+		return $options;
+	}
+
+	/**
+	 * Updates an array of objects.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return array Options object with a boolean if the option was updated.
+	 */
+	public function update_options( $request ) {
+		$params  = $request->get_json_params();
+		$updated = array();
+
+		if ( ! is_array( $params ) ) {
+			return array();
+		}
+
+		foreach ( $params as $key => $value ) {
+			$updated[ $key ] = update_option( $key, $value );
+		}
+
+		return $updated;
+	}
+
+	/**
+	 * Get the schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'options',
+			'type'       => 'object',
+			'properties' => array(
+				'options' => array(
+					'type'        => 'array',
+					'description' => __( 'Array of options with associated values.', 'woocommerce' ),
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+}

packages/woocommerce-admin/src/API/Orders.php

@@ -0,0 +1,278 @@
+<?php
+/**
+ * REST API Orders Controller
+ *
+ * Handles requests to /orders/*
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\API\Reports\Controller as ReportsController;
+
+/**
+ * Orders controller.
+ *
+ * @extends WC_REST_Orders_Controller
+ */
+class Orders extends \WC_REST_Orders_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params = parent::get_collection_params();
+		// This needs to remain a string to support extensions that filter Order Number.
+		$params['number'] = array(
+			'description'       => __( 'Limit result set to orders matching part of an order number.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		// Fix the default 'status' value until it can be patched in core.
+		$params['status']['default'] = array( 'any' );
+
+		// Analytics settings may affect the allowed status list.
+		$params['status']['items']['enum'] = ReportsController::get_order_statuses();
+
+		return $params;
+	}
+
+	/**
+	 * Prepare objects query.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $request ) {
+		global $wpdb;
+		$args = parent::prepare_objects_query( $request );
+
+		// Search by partial order number.
+		if ( ! empty( $request['number'] ) ) {
+			$partial_number = trim( $request['number'] );
+			$limit          = intval( $args['posts_per_page'] );
+			$order_ids      = $wpdb->get_col(
+				$wpdb->prepare(
+					"SELECT ID
+					FROM {$wpdb->prefix}posts
+					WHERE post_type = 'shop_order'
+					AND ID LIKE %s
+					LIMIT %d",
+					$wpdb->esc_like( absint( $partial_number ) ) . '%',
+					$limit
+				)
+			);
+
+			// Force WP_Query return empty if don't found any order.
+			$order_ids        = empty( $order_ids ) ? array( 0 ) : $order_ids;
+			$args['post__in'] = $order_ids;
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Get product IDs, names, and quantity from order ID.
+	 *
+	 * @param array $order_id ID of order.
+	 * @return array
+	 */
+	protected function get_products_by_order_id( $order_id ) {
+		global $wpdb;
+		$order_items_table    = $wpdb->prefix . 'woocommerce_order_items';
+		$order_itemmeta_table = $wpdb->prefix . 'woocommerce_order_itemmeta';
+		$products             = $wpdb->get_results(
+			$wpdb->prepare(
+				// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT
+				order_id,
+				order_itemmeta.meta_value as product_id,
+				order_itemmeta_2.meta_value as product_quantity,
+				order_itemmeta_3.meta_value as variation_id,
+				{$wpdb->posts}.post_title as product_name
+			FROM {$order_items_table} order_items
+			    LEFT JOIN {$order_itemmeta_table} order_itemmeta on order_items.order_item_id = order_itemmeta.order_item_id
+			    LEFT JOIN {$order_itemmeta_table} order_itemmeta_2 on order_items.order_item_id = order_itemmeta_2.order_item_id
+			    LEFT JOIN {$order_itemmeta_table} order_itemmeta_3 on order_items.order_item_id = order_itemmeta_3.order_item_id
+			    LEFT JOIN {$wpdb->posts} on {$wpdb->posts}.ID = order_itemmeta.meta_value
+			WHERE
+				order_id = ( %d )
+			    AND order_itemmeta.meta_key = '_product_id'
+				AND order_itemmeta_2.meta_key = '_qty'
+			  	AND order_itemmeta_3.meta_key = '_variation_id'
+			GROUP BY product_id
+			", // phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				$order_id
+			),
+			ARRAY_A
+		);
+
+		return $products;
+	}
+
+	/**
+	 * Get customer data from customer_id.
+	 *
+	 * @param array $customer_id ID of customer.
+	 * @return array
+	 */
+	protected function get_customer_by_id( $customer_id ) {
+		global $wpdb;
+
+		$customer_lookup_table = $wpdb->prefix . 'wc_customer_lookup';
+
+		$customer = $wpdb->get_row(
+			$wpdb->prepare(
+				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT * FROM {$customer_lookup_table} WHERE customer_id = ( %d )",
+				$customer_id
+			),
+			ARRAY_A
+		);
+
+		return $customer;
+	}
+
+	/**
+	 * Get formatted item data.
+	 *
+	 * @param  WC_Data $object WC_Data instance.
+	 * @return array
+	 */
+	protected function get_formatted_item_data( $object ) {
+		$extra_fields = array( 'customer', 'products' );
+		$fields       = false;
+		// Determine if the response fields were specified.
+		if ( ! empty( $this->request['_fields'] ) ) {
+			$fields = wp_parse_list( $this->request['_fields'] );
+
+			if ( 0 === count( $fields ) ) {
+				$fields = false;
+			} else {
+				$fields = array_map( 'trim', $fields );
+			}
+		}
+
+		// Initially skip line items if we can.
+		$using_order_class_override = is_a( $object, '\Automattic\WooCommerce\Admin\Overrides\Order' );
+		if ( $using_order_class_override ) {
+			$data = $object->get_data_without_line_items();
+		} else {
+			$data = $object->get_data();
+		}
+
+		$extra_fields      = false === $fields ? array() : array_intersect( $extra_fields, $fields );
+		$format_decimal    = array( 'discount_total', 'discount_tax', 'shipping_total', 'shipping_tax', 'shipping_total', 'shipping_tax', 'cart_tax', 'total', 'total_tax' );
+		$format_date       = array( 'date_created', 'date_modified', 'date_completed', 'date_paid' );
+		$format_line_items = array( 'line_items', 'tax_lines', 'shipping_lines', 'fee_lines', 'coupon_lines' );
+
+		// Add extra data as necessary.
+		$extra_data = array();
+		foreach ( $extra_fields as $field ) {
+			switch ( $field ) {
+				case 'customer':
+					$extra_data['customer'] = $this->get_customer_by_id( $data['customer_id'] );
+					break;
+				case 'products':
+					$extra_data['products'] = $this->get_products_by_order_id( $object->get_id() );
+					break;
+			}
+		}
+		// Format decimal values.
+		foreach ( $format_decimal as $key ) {
+			$data[ $key ] = wc_format_decimal( $data[ $key ], $this->request['dp'] );
+		}
+
+		// format total with order currency.
+		if ( $object instanceof \WC_Order ) {
+			$data['total_formatted'] = wp_strip_all_tags( html_entity_decode( $object->get_formatted_order_total() ), true );
+		}
+
+		// Format date values.
+		foreach ( $format_date as $key ) {
+			$datetime              = $data[ $key ];
+			$data[ $key ]          = wc_rest_prepare_date_response( $datetime, false );
+			$data[ $key . '_gmt' ] = wc_rest_prepare_date_response( $datetime );
+		}
+
+		// Format the order status.
+		$data['status'] = 'wc-' === substr( $data['status'], 0, 3 ) ? substr( $data['status'], 3 ) : $data['status'];
+
+		// Format requested line items.
+		$formatted_line_items = array();
+
+		foreach ( $format_line_items as $key ) {
+			if ( false === $fields || in_array( $key, $fields, true ) ) {
+				if ( $using_order_class_override ) {
+					$line_item_data = $object->get_line_item_data( $key );
+				} else {
+					$line_item_data = $data[ $key ];
+				}
+				$formatted_line_items[ $key ] = array_values( array_map( array( $this, 'get_order_item_data' ), $line_item_data ) );
+			}
+		}
+
+		// Refunds.
+		$data['refunds'] = array();
+		foreach ( $object->get_refunds() as $refund ) {
+			$data['refunds'][] = array(
+				'id'     => $refund->get_id(),
+				'reason' => $refund->get_reason() ? $refund->get_reason() : '',
+				'total'  => '-' . wc_format_decimal( $refund->get_amount(), $this->request['dp'] ),
+			);
+		}
+
+		return array_merge(
+			array(
+				'id'                   => $object->get_id(),
+				'parent_id'            => $data['parent_id'],
+				'number'               => $data['number'],
+				'order_key'            => $data['order_key'],
+				'created_via'          => $data['created_via'],
+				'version'              => $data['version'],
+				'status'               => $data['status'],
+				'currency'             => $data['currency'],
+				'date_created'         => $data['date_created'],
+				'date_created_gmt'     => $data['date_created_gmt'],
+				'date_modified'        => $data['date_modified'],
+				'date_modified_gmt'    => $data['date_modified_gmt'],
+				'discount_total'       => $data['discount_total'],
+				'discount_tax'         => $data['discount_tax'],
+				'shipping_total'       => $data['shipping_total'],
+				'shipping_tax'         => $data['shipping_tax'],
+				'cart_tax'             => $data['cart_tax'],
+				'total'                => $data['total'],
+				'total_formatted'      => isset( $data['total_formatted'] ) ? $data['total_formatted'] : $data['total'],
+				'total_tax'            => $data['total_tax'],
+				'prices_include_tax'   => $data['prices_include_tax'],
+				'customer_id'          => $data['customer_id'],
+				'customer_ip_address'  => $data['customer_ip_address'],
+				'customer_user_agent'  => $data['customer_user_agent'],
+				'customer_note'        => $data['customer_note'],
+				'billing'              => $data['billing'],
+				'shipping'             => $data['shipping'],
+				'payment_method'       => $data['payment_method'],
+				'payment_method_title' => $data['payment_method_title'],
+				'transaction_id'       => $data['transaction_id'],
+				'date_paid'            => $data['date_paid'],
+				'date_paid_gmt'        => $data['date_paid_gmt'],
+				'date_completed'       => $data['date_completed'],
+				'date_completed_gmt'   => $data['date_completed_gmt'],
+				'cart_hash'            => $data['cart_hash'],
+				'meta_data'            => $data['meta_data'],
+				'refunds'              => $data['refunds'],
+			),
+			$formatted_line_items,
+			$extra_data
+		);
+	}
+}

packages/woocommerce-admin/src/API/Plugins.php

@@ -0,0 +1,746 @@
+<?php
+/**
+ * REST API Plugins Controller
+ *
+ * Handles requests to install and activate depedent plugins.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+use Automattic\WooCommerce\Admin\Features\Onboarding;
+use Automattic\WooCommerce\Admin\PaymentPlugins;
+use Automattic\WooCommerce\Admin\PluginsHelper;
+use \Automattic\WooCommerce\Admin\Notes\InstallJPAndWCSPlugins;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Plugins Controller.
+ *
+ * @extends WC_REST_Data_Controller
+ */
+class Plugins extends \WC_REST_Data_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-admin';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'plugins';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/install',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'install_plugins' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/active',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'active_plugins' ),
+					'permission_callback' => array( $this, 'get_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/installed',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'installed_plugins' ),
+					'permission_callback' => array( $this, 'get_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/activate',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'activate_plugins' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/recommended-payment-plugins',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'recommended_payment_plugins' ),
+					'permission_callback' => array( $this, 'get_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/connect-jetpack',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'connect_jetpack' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_connect_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/request-wccom-connect',
+			array(
+				array(
+					'methods'             => 'POST',
+					'callback'            => array( $this, 'request_wccom_connect' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_connect_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/finish-wccom-connect',
+			array(
+				array(
+					'methods'             => 'POST',
+					'callback'            => array( $this, 'finish_wccom_connect' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_connect_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/connect-wcpay',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'connect_wcpay' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_connect_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/connect-square',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'connect_square' ),
+					'permission_callback' => array( $this, 'update_item_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_connect_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check if a given request has access to manage plugins.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function update_item_permissions_check( $request ) {
+		if ( ! current_user_can( 'install_plugins' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_update', __( 'Sorry, you cannot manage plugins.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+		return true;
+	}
+
+	/**
+	 * Create an alert notification in response to an error installing a plugin.
+	 *
+	 * @todo This should be moved to a filter to make this API more generic and less plugin-specific.
+	 *
+	 * @param string $slug The slug of the plugin being installed.
+	 */
+	private function create_install_plugin_error_inbox_notification_for_jetpack_installs( $slug ) {
+		// Exit early if we're not installing the Jetpack or the WooCommerce Shipping & Tax plugins.
+		if ( 'jetpack' !== $slug && 'woocommerce-services' !== $slug ) {
+			return;
+		}
+
+		InstallJPAndWCSPlugins::possibly_add_note();
+	}
+
+	/**
+	 * Install the requested plugin.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|array Plugin Status
+	 */
+	public function install_plugin( $request ) {
+		wc_deprecated_function( 'install_plugin', '4.3', '\Automattic\WooCommerce\Admin\API\Plugins()->install_plugins' );
+		// This method expects a `plugin` argument to be sent, install plugins requires plugins.
+		$request['plugins'] = $request['plugin'];
+		return self::install_plugins( $request );
+	}
+
+	/**
+	 * Installs the requested plugins.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|array Plugin Status
+	 */
+	public function install_plugins( $request ) {
+		$plugins = explode( ',', $request['plugins'] );
+
+		/**
+		 * Filter the list of plugins to install.
+		 *
+		 * @param array $plugins A list of the plugins to install.
+		 */
+		$plugins = apply_filters( 'woocommerce_admin_plugins_pre_install', $plugins );
+
+		if ( empty( $request['plugins'] ) || ! is_array( $plugins ) ) {
+			return new \WP_Error( 'woocommerce_rest_invalid_plugins', __( 'Plugins must be a non-empty array.', 'woocommerce' ), 404 );
+		}
+
+		require_once ABSPATH . 'wp-admin/includes/plugin.php';
+		include_once ABSPATH . '/wp-admin/includes/admin.php';
+		include_once ABSPATH . '/wp-admin/includes/plugin-install.php';
+		include_once ABSPATH . '/wp-admin/includes/plugin.php';
+		include_once ABSPATH . '/wp-admin/includes/class-wp-upgrader.php';
+		include_once ABSPATH . '/wp-admin/includes/class-plugin-upgrader.php';
+
+		$existing_plugins  = PluginsHelper::get_installed_plugins_paths();
+		$installed_plugins = array();
+		$results           = array();
+		$errors            = new \WP_Error();
+
+		foreach ( $plugins as $plugin ) {
+			$slug = sanitize_key( $plugin );
+
+			if ( isset( $existing_plugins[ $slug ] ) ) {
+				$installed_plugins[] = $plugin;
+				continue;
+			}
+
+			$api = plugins_api(
+				'plugin_information',
+				array(
+					'slug'   => $slug,
+					'fields' => array(
+						'sections' => false,
+					),
+				)
+			);
+
+			if ( is_wp_error( $api ) ) {
+				$properties = array(
+					/* translators: %s: plugin slug (example: woocommerce-services) */
+					'error_message' => __( 'The requested plugin `%s` could not be installed. Plugin API call failed.', 'woocommerce' ),
+					'api'           => $api,
+					'slug'          => $slug,
+				);
+				wc_admin_record_tracks_event( 'install_plugin_error', $properties );
+
+				$this->create_install_plugin_error_inbox_notification_for_jetpack_installs( $slug );
+
+				$errors->add(
+					$plugin,
+					sprintf(
+						/* translators: %s: plugin slug (example: woocommerce-services) */
+						__( 'The requested plugin `%s` could not be installed. Plugin API call failed.', 'woocommerce' ),
+						$slug
+					)
+				);
+
+				continue;
+			}
+
+			$upgrader           = new \Plugin_Upgrader( new \Automatic_Upgrader_Skin() );
+			$result             = $upgrader->install( $api->download_link );
+			$results[ $plugin ] = $result;
+
+			if ( is_wp_error( $result ) || is_null( $result ) ) {
+				$properties = array(
+					/* translators: %s: plugin slug (example: woocommerce-services) */
+					'error_message' => __( 'The requested plugin `%s` could not be installed.', 'woocommerce' ),
+					'slug'          => $slug,
+					'api'           => $api,
+					'upgrader'      => $upgrader,
+					'result'        => $result,
+				);
+				wc_admin_record_tracks_event( 'install_plugin_error', $properties );
+
+				$this->create_install_plugin_error_inbox_notification_for_jetpack_installs( $slug );
+
+				$errors->add(
+					$plugin,
+					sprintf(
+						/* translators: %s: plugin slug (example: woocommerce-services) */
+						__( 'The requested plugin `%s` could not be installed. Upgrader install failed.', 'woocommerce' ),
+						$slug
+					)
+				);
+				continue;
+			}
+
+			$installed_plugins[] = $plugin;
+		}
+
+		return array(
+			'data'    => array(
+				'installed' => $installed_plugins,
+				'results'   => $results,
+			),
+			'errors'  => $errors,
+			'success' => count( $errors->errors ) === 0,
+			'message' => count( $errors->errors ) === 0
+				? __( 'Plugins were successfully installed.', 'woocommerce' )
+				: __( 'There was a problem installing some of the requested plugins.', 'woocommerce' ),
+		);
+	}
+
+	/**
+	 * Returns a list of active plugins in API format.
+	 *
+	 * @return array Active plugins
+	 */
+	public static function active_plugins() {
+		return( array(
+			'plugins' => array_values( PluginsHelper::get_active_plugin_slugs() ),
+		) );
+	}
+	/**
+	 * Returns a list of active plugins.
+	 *
+	 * @return array Active plugins
+	 */
+	public static function get_active_plugins() {
+		$data = self::active_plugins();
+		return $data['plugins'];
+	}
+
+	/**
+	 * Returns a list of installed plugins.
+	 *
+	 * @return array Installed plugins
+	 */
+	public function installed_plugins() {
+		return( array(
+			'plugins' => PluginsHelper::get_installed_plugin_slugs(),
+		) );
+	}
+
+	/**
+	 * Activate the requested plugin.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|array Plugin Status
+	 */
+	public function activate_plugins( $request ) {
+		$plugin_paths      = PluginsHelper::get_installed_plugins_paths();
+		$plugins           = explode( ',', $request['plugins'] );
+		$errors            = new \WP_Error();
+		$activated_plugins = array();
+
+		if ( empty( $request['plugins'] ) || ! is_array( $plugins ) ) {
+			return new \WP_Error( 'woocommerce_rest_invalid_plugins', __( 'Plugins must be a non-empty array.', 'woocommerce' ), 404 );
+		}
+
+		require_once ABSPATH . 'wp-admin/includes/plugin.php';
+
+		// the mollie-payments-for-woocommerce plugin calls `WP_Filesystem()` during it's activation hook, which crashes without this include.
+		require_once ABSPATH . 'wp-admin/includes/file.php';
+
+		/**
+		 * Filter the list of plugins to activate.
+		 *
+		 * @param array $plugins A list of the plugins to activate.
+		 */
+		$plugins = apply_filters( 'woocommerce_admin_plugins_pre_activate', $plugins );
+
+		foreach ( $plugins as $plugin ) {
+			$slug = $plugin;
+			$path = isset( $plugin_paths[ $slug ] ) ? $plugin_paths[ $slug ] : false;
+
+			if ( ! $path ) {
+				$errors->add(
+					$plugin,
+					/* translators: %s: plugin slug (example: woocommerce-services) */
+					sprintf( __( 'The requested plugin `%s`. is not yet installed.', 'woocommerce' ), $slug )
+				);
+				continue;
+			}
+
+			$result = activate_plugin( $path );
+			if ( ! is_null( $result ) ) {
+				$this->create_install_plugin_error_inbox_notification_for_jetpack_installs( $slug );
+
+				$errors->add(
+					$plugin,
+					/* translators: %s: plugin slug (example: woocommerce-services) */
+					sprintf( __( 'The requested plugin `%s` could not be activated.', 'woocommerce' ), $slug )
+				);
+				continue;
+			}
+
+			$activated_plugins[] = $plugin;
+		}
+
+		return( array(
+			'data'    => array(
+				'activated' => $activated_plugins,
+				'active'    => self::get_active_plugins(),
+			),
+			'errors'  => $errors,
+			'success' => count( $errors->errors ) === 0,
+			'message' => count( $errors->errors ) === 0
+				? __( 'Plugins were successfully activated.', 'woocommerce' )
+				: __( 'There was a problem activating some of the requested plugins.', 'woocommerce' ),
+		) );
+	}
+
+	/**
+	 * Return recommended payment plugins.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return \WP_Error|\WP_HTTP_Response|\WP_REST_Response
+	 */
+	public function recommended_payment_plugins( $request ) {
+		// Default to marketing category (if no category set).
+		$all_plugins   = PaymentPlugins::get_instance()->get_recommended_plugins();
+		$valid_plugins = [];
+		$per_page      = $request->get_param( 'per_page' );
+		// We currently only support English suggestions, unless otherwise provided in locale-data.
+		$locale             = get_locale();
+		$suggestion_locales = array(
+			'en_AU',
+			'en_CA',
+			'en_GB',
+			'en_NZ',
+			'en_US',
+			'en_ZA',
+		);
+
+		foreach ( $all_plugins as $plugin ) {
+			if ( ! PluginsHelper::is_plugin_active( $plugin['product'] ) ) {
+				if ( isset( $plugin['locale-data'] ) && isset( $plugin['locale-data'][ $locale ] ) ) {
+					$locale_plugin = array_merge( $plugin, $plugin['locale-data'][ $locale ] );
+					unset( $locale_plugin['locale-data'] );
+					$valid_plugins[]      = $locale_plugin;
+					$suggestion_locales[] = $locale;
+				} else {
+					$valid_plugins[] = $plugin;
+				}
+			}
+		}
+
+		if ( ! in_array( $locale, $suggestion_locales, true ) ) {
+			// If not a supported locale we return an empty array.
+			return rest_ensure_response( array() );
+		}
+
+		return rest_ensure_response( array_slice( $valid_plugins, 0, $per_page ) );
+	}
+
+	/**
+	 * Generates a Jetpack Connect URL.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|array Connection URL for Jetpack
+	 */
+	public function connect_jetpack( $request ) {
+		if ( ! class_exists( '\Jetpack' ) ) {
+			return new \WP_Error( 'woocommerce_rest_jetpack_not_active', __( 'Jetpack is not installed or active.', 'woocommerce' ), 404 );
+		}
+
+		$redirect_url = apply_filters( 'woocommerce_admin_onboarding_jetpack_connect_redirect_url', esc_url_raw( $request['redirect_url'] ) );
+		$connect_url  = \Jetpack::init()->build_connect_url( true, $redirect_url, 'woocommerce-onboarding' );
+
+		$calypso_env = defined( 'WOOCOMMERCE_CALYPSO_ENVIRONMENT' ) && in_array( WOOCOMMERCE_CALYPSO_ENVIRONMENT, array( 'development', 'wpcalypso', 'horizon', 'stage' ), true ) ? WOOCOMMERCE_CALYPSO_ENVIRONMENT : 'production';
+		$connect_url = add_query_arg( array( 'calypso_env' => $calypso_env ), $connect_url );
+
+		return( array(
+			'slug'          => 'jetpack',
+			'name'          => __( 'Jetpack', 'woocommerce' ),
+			'connectAction' => $connect_url,
+		) );
+	}
+
+	/**
+	 *  Kicks off the WCCOM Connect process.
+	 *
+	 * @return WP_Error|array Connection URL for WooCommerce.com
+	 */
+	public function request_wccom_connect() {
+		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper-api.php';
+		if ( ! class_exists( 'WC_Helper_API' ) ) {
+			return new \WP_Error( 'woocommerce_rest_helper_not_active', __( 'There was an error loading the WooCommerce.com Helper API.', 'woocommerce' ), 404 );
+		}
+
+		$redirect_uri = wc_admin_url( '&task=connect&wccom-connected=1' );
+
+		$request = \WC_Helper_API::post(
+			'oauth/request_token',
+			array(
+				'body' => array(
+					'home_url'     => home_url(),
+					'redirect_uri' => $redirect_uri,
+				),
+			)
+		);
+
+		$code = wp_remote_retrieve_response_code( $request );
+		if ( 200 !== $code ) {
+			return new \WP_Error( 'woocommerce_rest_helper_connect', __( 'There was an error connecting to WooCommerce.com. Please try again.', 'woocommerce' ), 500 );
+		}
+
+		$secret = json_decode( wp_remote_retrieve_body( $request ) );
+		if ( empty( $secret ) ) {
+			return new \WP_Error( 'woocommerce_rest_helper_connect', __( 'There was an error connecting to WooCommerce.com. Please try again.', 'woocommerce' ), 500 );
+		}
+
+		do_action( 'woocommerce_helper_connect_start' );
+
+		$connect_url = add_query_arg(
+			array(
+				'home_url'     => rawurlencode( home_url() ),
+				'redirect_uri' => rawurlencode( $redirect_uri ),
+				'secret'       => rawurlencode( $secret ),
+				'wccom-from'   => 'onboarding',
+			),
+			\WC_Helper_API::url( 'oauth/authorize' )
+		);
+
+		if ( defined( 'WOOCOMMERCE_CALYPSO_ENVIRONMENT' ) && in_array( WOOCOMMERCE_CALYPSO_ENVIRONMENT, array( 'development', 'wpcalypso', 'horizon', 'stage' ), true ) ) {
+			$connect_url = add_query_arg(
+				array(
+					'calypso_env' => WOOCOMMERCE_CALYPSO_ENVIRONMENT,
+				),
+				$connect_url
+			);
+		}
+
+		return( array(
+			'connectAction' => $connect_url,
+		) );
+	}
+
+	/**
+	 * Finishes connecting to WooCommerce.com.
+	 *
+	 * @param  object $rest_request Request details.
+	 * @return WP_Error|array Contains success status.
+	 */
+	public function finish_wccom_connect( $rest_request ) {
+		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper.php';
+		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper-api.php';
+		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper-updater.php';
+		include_once WC_ABSPATH . 'includes/admin/helper/class-wc-helper-options.php';
+		if ( ! class_exists( 'WC_Helper_API' ) ) {
+			return new \WP_Error( 'woocommerce_rest_helper_not_active', __( 'There was an error loading the WooCommerce.com Helper API.', 'woocommerce' ), 404 );
+		}
+
+		// Obtain an access token.
+		$request = \WC_Helper_API::post(
+			'oauth/access_token',
+			array(
+				'body' => array(
+					'request_token' => wp_unslash( $rest_request['request_token'] ), // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
+					'home_url'      => home_url(),
+				),
+			)
+		);
+
+		$code = wp_remote_retrieve_response_code( $request );
+		if ( 200 !== $code ) {
+			return new \WP_Error( 'woocommerce_rest_helper_connect', __( 'There was an error connecting to WooCommerce.com. Please try again.', 'woocommerce' ), 500 );
+		}
+
+		$access_token = json_decode( wp_remote_retrieve_body( $request ), true );
+		if ( ! $access_token ) {
+			return new \WP_Error( 'woocommerce_rest_helper_connect', __( 'There was an error connecting to WooCommerce.com. Please try again.', 'woocommerce' ), 500 );
+		}
+
+		\WC_Helper_Options::update(
+			'auth',
+			array(
+				'access_token'        => $access_token['access_token'],
+				'access_token_secret' => $access_token['access_token_secret'],
+				'site_id'             => $access_token['site_id'],
+				'user_id'             => get_current_user_id(),
+				'updated'             => time(),
+			)
+		);
+
+		if ( ! \WC_Helper::_flush_authentication_cache() ) {
+			\WC_Helper_Options::update( 'auth', array() );
+			return new \WP_Error( 'woocommerce_rest_helper_connect', __( 'There was an error connecting to WooCommerce.com. Please try again.', 'woocommerce' ), 500 );
+		}
+
+		delete_transient( '_woocommerce_helper_subscriptions' );
+		\WC_Helper_Updater::flush_updates_cache();
+
+		do_action( 'woocommerce_helper_connected' );
+
+		return array(
+			'success' => true,
+		);
+	}
+
+
+	/**
+	 * Returns a URL that can be used to connect to Square.
+	 *
+	 * @return WP_Error|array Connect URL.
+	 */
+	public function connect_square() {
+		if ( ! class_exists( '\WooCommerce\Square\Handlers\Connection' ) ) {
+			return new \WP_Error( 'woocommerce_rest_helper_connect', __( 'There was an error connecting to Square.', 'woocommerce' ), 500 );
+		}
+
+		if ( 'US' === WC()->countries->get_base_country() ) {
+			$profile = get_option( Onboarding::PROFILE_DATA_OPTION, array() );
+			if ( ! empty( $profile['industry'] ) ) {
+				$has_cbd_industry = in_array( 'cbd-other-hemp-derived-products', array_column( $profile['industry'], 'slug' ), true );
+			}
+		}
+
+		if ( $has_cbd_industry ) {
+			$url = 'https://squareup.com/t/f_partnerships/d_referrals/p_woocommerce/c_general/o_none/l_us/dt_alldevice/pr_payments/?route=/solutions/cbd';
+		} else {
+			$url = \WooCommerce\Square\Handlers\Connection::CONNECT_URL_PRODUCTION;
+		}
+
+		$redirect_url = wp_nonce_url( wc_admin_url( '&task=payments&method=square&square-connect-finish=1' ), 'wc_square_connected' );
+		$args         = array(
+			'redirect' => rawurlencode( rawurlencode( $redirect_url ) ),
+			'scopes'   => implode(
+				',',
+				array(
+					'MERCHANT_PROFILE_READ',
+					'PAYMENTS_READ',
+					'PAYMENTS_WRITE',
+					'ORDERS_READ',
+					'ORDERS_WRITE',
+					'CUSTOMERS_READ',
+					'CUSTOMERS_WRITE',
+					'SETTLEMENTS_READ',
+					'ITEMS_READ',
+					'ITEMS_WRITE',
+					'INVENTORY_READ',
+					'INVENTORY_WRITE',
+				)
+			),
+		);
+
+		$connect_url = add_query_arg( $args, $url );
+
+		return( array(
+			'connectUrl' => $connect_url,
+		) );
+	}
+
+	/**
+	 * Returns a URL that can be used to by WCPay to verify business details with Stripe.
+	 *
+	 * @return WP_Error|array Connect URL.
+	 */
+	public function connect_wcpay() {
+		if ( ! class_exists( 'WC_Payments_Account' ) ) {
+			return new \WP_Error( 'woocommerce_rest_helper_connect', __( 'There was an error communicating with the WooCommerce Payments plugin.', 'woocommerce' ), 500 );
+		}
+
+		$connect_url = add_query_arg(
+			array(
+				'wcpay-connect' => 'WCADMIN_PAYMENT_TASK',
+				'_wpnonce'      => wp_create_nonce( 'wcpay-connect' ),
+			),
+			admin_url()
+		);
+
+		return( array(
+			'connectUrl' => $connect_url,
+		) );
+	}
+
+	/**
+	 * Get the schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'plugins',
+			'type'       => 'object',
+			'properties' => array(
+				'slug'   => array(
+					'description' => __( 'Plugin slug.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'name'   => array(
+					'description' => __( 'Plugin name.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'status' => array(
+					'description' => __( 'Plugin status.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_connect_schema() {
+		$schema = $this->get_item_schema();
+		unset( $schema['properties']['status'] );
+		$schema['properties']['connectAction'] = array(
+			'description' => __( 'Action that should be completed to connect Jetpack.', 'woocommerce' ),
+			'type'        => 'string',
+			'context'     => array( 'view', 'edit' ),
+			'readonly'    => true,
+		);
+		return $schema;
+	}
+}

packages/woocommerce-admin/src/API/ProductAttributeTerms.php

@@ -0,0 +1,175 @@
+<?php
+/**
+ * REST API Product Attribute Terms Controller
+ *
+ * Handles requests to /products/attributes/<slug>/terms
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Product attribute terms controller.
+ *
+ * @extends WC_REST_Product_Attribute_Terms_Controller
+ */
+class ProductAttributeTerms extends \WC_REST_Product_Attribute_Terms_Controller {
+	use CustomAttributeTraits;
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+
+	/**
+	 * Register the routes for custom product attributes.
+	 */
+	public function register_routes() {
+		parent::register_routes();
+
+		register_rest_route(
+			$this->namespace,
+			'products/attributes/(?P<slug>[a-z0-9_\-]+)/terms',
+			array(
+				'args'   => array(
+					'slug' => array(
+						'description' => __( 'Slug identifier for the resource.', 'woocommerce' ),
+						'type'        => 'string',
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_item_by_slug' ),
+					'permission_callback' => array( $this, 'get_custom_attribute_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check if a given request has access to read a custom attribute.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_custom_attribute_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'attributes', 'read' ) ) {
+			return new WP_Error(
+				'woocommerce_rest_cannot_view',
+				__( 'Sorry, you cannot view this resource.', 'woocommerce' ),
+				array(
+					'status' => rest_authorization_required_code(),
+				)
+			);
+		}
+
+		return true;
+	}
+
+	/**
+	 * Get the Attribute's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = parent::get_item_schema();
+		// Custom attributes substitute slugs for numeric IDs.
+		$schema['properties']['id']['type'] = array( 'integer', 'string' );
+
+		return $schema;
+	}
+
+	/**
+	 * Query custom attribute values by slug.
+	 *
+	 * @param string $slug Attribute slug.
+	 * @return array Attribute values, formatted for response.
+	 */
+	protected function get_custom_attribute_values( $slug ) {
+		global $wpdb;
+
+		if ( empty( $slug ) ) {
+			return array();
+		}
+
+		$attribute_values = array();
+
+		// Get the attribute properties.
+		$attribute = $this->get_custom_attribute_by_slug( $slug );
+
+		if ( is_wp_error( $attribute ) ) {
+			return $attribute;
+		}
+
+		// Find all attribute values assigned to products.
+		$query_results = $wpdb->get_results(
+			$wpdb->prepare(
+				"SELECT meta_value, COUNT(meta_id) AS product_count
+				FROM {$wpdb->postmeta}
+				WHERE meta_key = %s
+				AND meta_value != ''
+				GROUP BY meta_value",
+				'attribute_' . esc_sql( $slug )
+			),
+			OBJECT_K
+		);
+
+		// Ensure all defined properties are in the response.
+		$defined_values = wc_get_text_attributes( $attribute[ $slug ]['value'] );
+
+		foreach ( $defined_values as $defined_value ) {
+			if ( array_key_exists( $defined_value, $query_results ) ) {
+				continue;
+			}
+
+			$query_results[ $defined_value ] = (object) array(
+				'meta_value'    => $defined_value, // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_value
+				'product_count' => 0,
+			);
+		}
+
+		foreach ( $query_results as $term_value => $term ) {
+			// Mimic the structure of a taxonomy-backed attribute values for response.
+			$data = array(
+				'id'          => $term_value,
+				'name'        => $term_value,
+				'slug'        => $term_value,
+				'description' => '',
+				'menu_order'  => 0,
+				'count'       => (int) $term->product_count,
+			);
+
+			$response = rest_ensure_response( $data );
+			$response->add_links(
+				array(
+					'collection' => array(
+						'href' => rest_url(
+							$this->namespace . '/products/attributes/' . $slug . '/terms'
+						),
+					),
+				)
+			);
+			$response = $this->prepare_response_for_collection( $response );
+
+			$attribute_values[ $term_value ] = $response;
+		}
+
+		return array_values( $attribute_values );
+	}
+
+	/**
+	 * Get a single custom attribute.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_REST_Request|WP_Error
+	 */
+	public function get_item_by_slug( $request ) {
+		return $this->get_custom_attribute_values( $request['slug'] );
+	}
+}

packages/woocommerce-admin/src/API/ProductAttributes.php

@@ -0,0 +1,167 @@
+<?php
+/**
+ * REST API Product Attributes Controller
+ *
+ * Handles requests to /products/attributes.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Product categories controller.
+ *
+ * @extends WC_REST_Product_Attributes_Controller
+ */
+class ProductAttributes extends \WC_REST_Product_Attributes_Controller {
+	use CustomAttributeTraits;
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Register the routes for custom product attributes.
+	 */
+	public function register_routes() {
+		parent::register_routes();
+
+		register_rest_route(
+			$this->namespace,
+			'products/attributes/(?P<slug>[a-z0-9_\-]+)',
+			array(
+				'args'   => array(
+					'slug' => array(
+						'description' => __( 'Slug identifier for the resource.', 'woocommerce' ),
+						'type'        => 'string',
+					),
+				),
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_item_by_slug' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Get the query params for collections
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params           = parent::get_collection_params();
+		$params['search'] = array(
+			'description'       => __( 'Search by similar attribute name.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the Attribute's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = parent::get_item_schema();
+		// Custom attributes substitute slugs for numeric IDs.
+		$schema['properties']['id']['type'] = array( 'integer', 'string' );
+
+		return $schema;
+	}
+
+	/**
+	 * Get a single attribute by it's slug.
+	 *
+	 * @param WP_REST_Request $request The API request.
+	 * @return WP_REST_Response
+	 */
+	public function get_item_by_slug( $request ) {
+		if ( empty( $request['slug'] ) ) {
+			return array();
+		}
+
+		$attributes = $this->get_custom_attribute_by_slug( $request['slug'] );
+
+		if ( is_wp_error( $attributes ) ) {
+			return $attributes;
+		}
+
+		$response_items = $this->format_custom_attribute_items_for_response( $attributes );
+
+		return reset( $response_items );
+	}
+
+	/**
+	 * Format custom attribute items for response (mimic the structure of a taxonomy - backed attribute).
+	 *
+	 * @param array $custom_attributes - CustomAttributeTraits::get_custom_attributes().
+	 * @return array
+	 */
+	public function format_custom_attribute_items_for_response( $custom_attributes ) {
+		$response = array();
+
+		foreach ( $custom_attributes as $attribute_key => $attribute_value ) {
+			$data = array(
+				'id'           => $attribute_key,
+				'name'         => $attribute_value['name'],
+				'slug'         => $attribute_key,
+				'type'         => 'select',
+				'order_by'     => 'menu_order',
+				'has_archives' => false,
+			);
+
+			$item_response = rest_ensure_response( $data );
+			$item_response->add_links( $this->prepare_links( (object) array( 'attribute_id' => $attribute_key ) ) );
+			$item_response = $this->prepare_response_for_collection(
+				$item_response
+			);
+
+			$response[] = $item_response;
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Get all attributes, with support for searching (which includes custom attributes).
+	 *
+	 * @param WP_REST_Request $request The API request.
+	 * @return WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		if ( empty( $request['search'] ) ) {
+			return parent::get_items( $request );
+		}
+
+		$search_string       = $request['search'];
+		$custom_attributes   = $this->get_custom_attributes( array( 'name' => $search_string ) );
+		$matching_attributes = $this->format_custom_attribute_items_for_response( $custom_attributes );
+		$taxonomy_attributes = wc_get_attribute_taxonomies();
+
+		foreach ( $taxonomy_attributes as $attribute_obj ) {
+			// Skip taxonomy attributes that didn't match the query.
+			if ( false === stripos( $attribute_obj->attribute_label, $search_string ) ) {
+				continue;
+			}
+
+			$attribute             = $this->prepare_item_for_response( $attribute_obj, $request );
+			$matching_attributes[] = $this->prepare_response_for_collection( $attribute );
+		}
+
+		$response = rest_ensure_response( $matching_attributes );
+		$response->header( 'X-WP-Total', count( $matching_attributes ) );
+		$response->header( 'X-WP-TotalPages', 1 );
+
+		return $response;
+	}
+}

packages/woocommerce-admin/src/API/ProductCategories.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * REST API Product Categories Controller
+ *
+ * Handles requests to /products/categories.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Product categories controller.
+ *
+ * @extends WC_REST_Product_Categories_Controller
+ */
+class ProductCategories extends \WC_REST_Product_Categories_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+}

packages/woocommerce-admin/src/API/ProductReviews.php

@@ -0,0 +1,54 @@
+<?php
+/**
+ * REST API Product Reviews Controller
+ *
+ * Handles requests to /products/reviews.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Product reviews controller.
+ *
+ * @extends WC_REST_Product_Reviews_Controller
+ */
+class ProductReviews extends \WC_REST_Product_Reviews_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param WP_Comment $review Product review object.
+	 * @return array Links for the given product review.
+	 */
+	protected function prepare_links( $review ) {
+		$links = array(
+			'self'       => array(
+				'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $review->comment_ID ) ),
+			),
+			'collection' => array(
+				'href' => rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ),
+			),
+		);
+		if ( 0 !== (int) $review->comment_post_ID ) {
+			$links['up'] = array(
+				'href'       => rest_url( sprintf( '/%s/products/%d', $this->namespace, $review->comment_post_ID ) ),
+				'embeddable' => true,
+			);
+		}
+		if ( 0 !== (int) $review->user_id ) {
+			$links['reviewer'] = array(
+				'href'       => rest_url( 'wp/v2/users/' . $review->user_id ),
+				'embeddable' => true,
+			);
+		}
+		return $links;
+	}
+}

packages/woocommerce-admin/src/API/ProductVariations.php

@@ -0,0 +1,203 @@
+<?php
+/**
+ * REST API Product Variations Controller
+ *
+ * Handles requests to /products/variations.
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Product variations controller.
+ *
+ * @extends WC_REST_Product_Variations_Controller
+ */
+class ProductVariations extends \WC_REST_Product_Variations_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Register the routes for products.
+	 */
+	public function register_routes() {
+		parent::register_routes();
+
+		// Add a route for listing variations without specifying the parent product ID.
+		register_rest_route(
+			$this->namespace,
+			'/variations',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params           = parent::get_collection_params();
+		$params['search'] = array(
+			'description'       => __( 'Search by similar product name, sku, or attribute value.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+
+	/**
+	 * Add in conditional search filters for variations.
+	 *
+	 * @param string $where Where clause used to search posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_filter( $where, $wp_query ) {
+		global $wpdb;
+
+		$search = $wp_query->get( 'search' );
+		if ( $search ) {
+			$like       = '%' . $wpdb->esc_like( $search ) . '%';
+			$conditions = array(
+				$wpdb->prepare( "{$wpdb->posts}.post_title LIKE %s", $like ), // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				$wpdb->prepare( 'attr_search_meta.meta_value LIKE %s', $like ), // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+			);
+
+			if ( wc_product_sku_enabled() ) {
+				$conditions[] = $wpdb->prepare( 'wc_product_meta_lookup.sku LIKE %s', $like );
+			}
+
+			$where .= ' AND (' . implode( ' OR ', $conditions ) . ')';
+		}
+
+		return $where;
+	}
+
+	/**
+	 * Join posts meta tables when variation search query is present.
+	 *
+	 * @param string $join Join clause used to search posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_join( $join, $wp_query ) {
+		global $wpdb;
+
+		$search = $wp_query->get( 'search' );
+		if ( $search ) {
+			$join .= " LEFT JOIN {$wpdb->postmeta} AS attr_search_meta
+						ON {$wpdb->posts}.ID = attr_search_meta.post_id
+						AND attr_search_meta.meta_key LIKE 'attribute_%' ";
+		}
+
+		if ( wc_product_sku_enabled() && ! strstr( $join, 'wc_product_meta_lookup' ) ) {
+			$join .= " LEFT JOIN {$wpdb->wc_product_meta_lookup} wc_product_meta_lookup
+						ON $wpdb->posts.ID = wc_product_meta_lookup.product_id ";
+		}
+
+		return $join;
+	}
+
+	/**
+	 * Add product name and sku filtering to the WC API.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $request ) {
+		$args = parent::prepare_objects_query( $request );
+
+		if ( ! empty( $request['search'] ) ) {
+			$args['search'] = $request['search'];
+			unset( $args['s'] );
+		}
+
+		// Retreive variations without specifying a parent product.
+		if ( "/{$this->namespace}/variations" === $request->get_route() ) {
+			unset( $args['post_parent'] );
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Get a collection of posts and add the post title filter option to WP_Query.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		add_filter( 'posts_where', array( __CLASS__, 'add_wp_query_filter' ), 10, 2 );
+		add_filter( 'posts_join', array( __CLASS__, 'add_wp_query_join' ), 10, 2 );
+		add_filter( 'posts_groupby', array( 'Automattic\WooCommerce\Admin\API\Products', 'add_wp_query_group_by' ), 10, 2 );
+		$response = parent::get_items( $request );
+		remove_filter( 'posts_where', array( __CLASS__, 'add_wp_query_filter' ), 10 );
+		remove_filter( 'posts_join', array( __CLASS__, 'add_wp_query_join' ), 10 );
+		remove_filter( 'posts_groupby', array( 'Automattic\WooCommerce\Admin\API\Products', 'add_wp_query_group_by' ), 10 );
+		return $response;
+	}
+
+	/**
+	 * Get the Product's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = parent::get_item_schema();
+
+		$schema['properties']['name']      = array(
+			'description' => __( 'Product parent name.', 'woocommerce' ),
+			'type'        => 'string',
+			'context'     => array( 'view', 'edit' ),
+		);
+		$schema['properties']['type']      = array(
+			'description' => __( 'Product type.', 'woocommerce' ),
+			'type'        => 'string',
+			'default'     => 'variation',
+			'enum'        => array( 'variation' ),
+			'context'     => array( 'view', 'edit' ),
+		);
+		$schema['properties']['parent_id'] = array(
+			'description' => __( 'Product parent ID.', 'woocommerce' ),
+			'type'        => 'integer',
+			'context'     => array( 'view', 'edit' ),
+		);
+
+		return $schema;
+	}
+
+	/**
+	 * Prepare a single variation output for response.
+	 *
+	 * @param  WC_Data         $object  Object data.
+	 * @param  WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_object_for_response( $object, $request ) {
+		$context  = empty( $request['context'] ) ? 'view' : $request['context'];
+		$response = parent::prepare_object_for_response( $object, $request );
+		$data     = $response->get_data();
+
+		$data['name']      = $object->get_name( $context );
+		$data['type']      = $object->get_type();
+		$data['parent_id'] = $object->get_parent_id( $context );
+
+		$response->set_data( $data );
+
+		return $response;
+	}
+}

packages/woocommerce-admin/src/API/Products.php

@@ -0,0 +1,326 @@
+<?php
+/**
+ * REST API Products Controller
+ *
+ * Handles requests to /products/*
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Products controller.
+ *
+ * @extends WC_REST_Products_Controller
+ */
+class Products extends \WC_REST_Products_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Local cache of last order dates by ID.
+	 *
+	 * @var array
+	 */
+	protected $last_order_dates = array();
+
+	/**
+	 * Adds properties that can be embed via ?_embed=1.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = parent::get_item_schema();
+
+		$properties_to_embed = array(
+			'id',
+			'name',
+			'slug',
+			'permalink',
+			'images',
+			'description',
+			'short_description',
+		);
+
+		foreach ( $properties_to_embed as $property ) {
+			$schema['properties'][ $property ]['context'][] = 'embed';
+		}
+
+		$schema['properties']['last_order_date'] = array(
+			'description' => __( "The date the last order for this product was placed, in the site's timezone.", 'woocommerce' ),
+			'type'        => 'date-time',
+			'context'     => array( 'view', 'edit' ),
+			'readonly'    => true,
+		);
+
+		return $schema;
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                 = parent::get_collection_params();
+		$params['low_in_stock'] = array(
+			'description'       => __( 'Limit result set to products that are low or out of stock. (Deprecated)', 'woocommerce' ),
+			'type'              => 'boolean',
+			'default'           => false,
+			'sanitize_callback' => 'wc_string_to_bool',
+		);
+		$params['search']       = array(
+			'description'       => __( 'Search by similar product name or sku.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+
+
+	/**
+	 * Add product name and sku filtering to the WC API.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $request ) {
+		$args = parent::prepare_objects_query( $request );
+
+		if ( ! empty( $request['search'] ) ) {
+			$args['search'] = trim( $request['search'] );
+			unset( $args['s'] );
+		}
+		if ( ! empty( $request['low_in_stock'] ) ) {
+			$args['low_in_stock'] = $request['low_in_stock'];
+			$args['post_type']    = array( 'product', 'product_variation' );
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Get a collection of posts and add the post title filter option to WP_Query.
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_items( $request ) {
+		add_filter( 'posts_fields', array( __CLASS__, 'add_wp_query_fields' ), 10, 2 );
+		add_filter( 'posts_where', array( __CLASS__, 'add_wp_query_filter' ), 10, 2 );
+		add_filter( 'posts_join', array( __CLASS__, 'add_wp_query_join' ), 10, 2 );
+		add_filter( 'posts_groupby', array( __CLASS__, 'add_wp_query_group_by' ), 10, 2 );
+		$response = parent::get_items( $request );
+		remove_filter( 'posts_fields', array( __CLASS__, 'add_wp_query_fields' ), 10 );
+		remove_filter( 'posts_where', array( __CLASS__, 'add_wp_query_filter' ), 10 );
+		remove_filter( 'posts_join', array( __CLASS__, 'add_wp_query_join' ), 10 );
+		remove_filter( 'posts_groupby', array( __CLASS__, 'add_wp_query_group_by' ), 10 );
+
+		/**
+		 * The low stock query caused performance issues in WooCommerce 5.5.1
+		 * due to a) being slow, and b) multiple requests being made to this endpoint
+		 * from WC Admin.
+		 *
+		 * This is a temporary measure to trigger the user’s browser to cache the
+		 * endpoint response for 1 minute, limiting the amount of requests overall.
+		 *
+		 * https://github.com/woocommerce/woocommerce-admin/issues/7358
+		 */
+		if ( $this->is_low_in_stock_request( $request ) ) {
+			$response->header( 'Cache-Control', 'max-age=300' );
+		}
+		return $response;
+	}
+
+	/**
+	 * Check whether the request is for products low in stock.
+	 *
+	 * It matches requests with paramaters:
+	 *
+	 * low_in_stock = true
+	 * page = 1
+	 * fields[0] = id
+	 *
+	 * @param string $request WP REST API request.
+	 * @return boolean Whether the request matches.
+	 */
+	private function is_low_in_stock_request( $request ) {
+		if (
+			$request->get_param( 'low_in_stock' ) === true &&
+			$request->get_param( 'page' ) === 1 &&
+			is_array( $request->get_param( '_fields' ) ) &&
+			count( $request->get_param( '_fields' ) ) === 1 &&
+			in_array( 'id', $request->get_param( '_fields' ), true )
+		) {
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Hang onto last order date since it will get removed by wc_get_product().
+	 *
+	 * @param stdClass $object_data Single row from query results.
+	 * @return WC_Data
+	 */
+	public function get_object( $object_data ) {
+		if ( isset( $object_data->last_order_date ) ) {
+			$this->last_order_dates[ $object_data->ID ] = $object_data->last_order_date;
+		}
+		return parent::get_object( $object_data );
+	}
+
+	/**
+	 * Add `low_stock_amount` property to product data
+	 *
+	 * @param WC_Data         $object  Object data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_object_for_response( $object, $request ) {
+		$data        = parent::prepare_object_for_response( $object, $request );
+		$object_data = $object->get_data();
+		$product_id  = $object_data['id'];
+
+		if ( $request->get_param( 'low_in_stock' ) ) {
+			if ( is_numeric( $object_data['low_stock_amount'] ) ) {
+				$data->data['low_stock_amount'] = $object_data['low_stock_amount'];
+			}
+			if ( isset( $this->last_order_dates[ $product_id ] ) ) {
+				$data->data['last_order_date'] = wc_rest_prepare_date_response( $this->last_order_dates[ $product_id ] );
+			}
+		}
+		if ( isset( $data->data['name'] ) ) {
+			$data->data['name'] = wp_strip_all_tags( $data->data['name'] );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Add in conditional select fields to the query.
+	 *
+	 * @param string $select Select clause used to select fields from the query.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_fields( $select, $wp_query ) {
+		if ( $wp_query->get( 'low_in_stock' ) ) {
+			$fields  = array(
+				'low_stock_amount_meta.meta_value AS low_stock_amount',
+				'MAX( product_lookup.date_created ) AS last_order_date',
+			);
+			$select .= ', ' . implode( ', ', $fields );
+		}
+
+		return $select;
+	}
+
+	/**
+	 * Add in conditional search filters for products.
+	 *
+	 * @param string $where Where clause used to search posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_filter( $where, $wp_query ) {
+		global $wpdb;
+
+		$search = $wp_query->get( 'search' );
+		if ( $search ) {
+			$title_like = '%' . $wpdb->esc_like( $search ) . '%';
+			$where     .= $wpdb->prepare( " AND ({$wpdb->posts}.post_title LIKE %s", $title_like );  // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+			$where     .= wc_product_sku_enabled() ? $wpdb->prepare( ' OR wc_product_meta_lookup.sku LIKE %s)', $search ) : ')';
+		}
+
+		if ( $wp_query->get( 'low_in_stock' ) ) {
+			$low_stock_amount = absint( max( get_option( 'woocommerce_notify_low_stock_amount' ), 1 ) );
+			$where           .= "
+			AND wc_product_meta_lookup.stock_quantity IS NOT NULL
+			AND wc_product_meta_lookup.stock_status IN('instock','outofstock')
+			AND (
+				(
+					low_stock_amount_meta.meta_value > ''
+					AND wc_product_meta_lookup.stock_quantity <= CAST(low_stock_amount_meta.meta_value AS SIGNED)
+				)
+				OR (
+					(
+						low_stock_amount_meta.meta_value IS NULL OR low_stock_amount_meta.meta_value <= ''
+					)
+					AND wc_product_meta_lookup.stock_quantity <= {$low_stock_amount}
+				)
+			)";
+		}
+
+		return $where;
+	}
+
+	/**
+	 * Join posts meta tables when product search or low stock query is present.
+	 *
+	 * @param string $join Join clause used to search posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_join( $join, $wp_query ) {
+		global $wpdb;
+
+		$search = $wp_query->get( 'search' );
+		if ( $search && wc_product_sku_enabled() ) {
+			$join = self::append_product_sorting_table_join( $join );
+		}
+
+		if ( $wp_query->get( 'low_in_stock' ) ) {
+			$product_lookup_table = $wpdb->prefix . 'wc_order_product_lookup';
+
+			$join  = self::append_product_sorting_table_join( $join );
+			$join .= " LEFT JOIN {$wpdb->postmeta} AS low_stock_amount_meta ON {$wpdb->posts}.ID = low_stock_amount_meta.post_id AND low_stock_amount_meta.meta_key = '_low_stock_amount' ";
+			$join .= " LEFT JOIN {$product_lookup_table} product_lookup ON {$wpdb->posts}.ID = CASE
+				WHEN {$wpdb->posts}.post_type = 'product' THEN product_lookup.product_id
+				WHEN {$wpdb->posts}.post_type = 'product_variation' THEN product_lookup.variation_id
+			END";
+		}
+
+		return $join;
+	}
+
+	/**
+	 * Join wc_product_meta_lookup to posts if not already joined.
+	 *
+	 * @param string $sql SQL join.
+	 * @return string
+	 */
+	protected static function append_product_sorting_table_join( $sql ) {
+		global $wpdb;
+
+		if ( ! strstr( $sql, 'wc_product_meta_lookup' ) ) {
+			$sql .= " LEFT JOIN {$wpdb->wc_product_meta_lookup} wc_product_meta_lookup ON $wpdb->posts.ID = wc_product_meta_lookup.product_id ";
+		}
+		return $sql;
+	}
+
+	/**
+	 * Group by post ID to prevent duplicates.
+	 *
+	 * @param string $groupby Group by clause used to organize posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_group_by( $groupby, $wp_query ) {
+		global $wpdb;
+
+		$search       = $wp_query->get( 'search' );
+		$low_in_stock = $wp_query->get( 'low_in_stock' );
+		if ( empty( $groupby ) && ( $search || $low_in_stock ) ) {
+			$groupby = $wpdb->posts . '.ID';
+		}
+		return $groupby;
+	}
+}

packages/woocommerce-admin/src/API/ProductsLowInStock.php

@@ -0,0 +1,318 @@
+<?php
+/**
+ * REST API ProductsLowInStock Controller
+ *
+ * Handles request to /products/low-in-stock
+ */
+
+namespace Automattic\WooCommerce\Admin\API;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * ProductsLowInStock controller.
+ *
+ * @extends WC_REST_Products_Controller
+ */
+final class ProductsLowInStock extends \WC_REST_Products_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'products/low-in-stock',
+			array(
+				'args'   => array(),
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Get low in stock products.
+	 *
+	 * @param WP_REST_Request $request request object.
+	 *
+	 * @return WP_REST_Response|WP_ERROR
+	 */
+	public function get_items( $request ) {
+		$query_results = $this->get_low_in_stock_products(
+			$request->get_param( 'page' ),
+			$request->get_param( 'per_page' ),
+			$request->get_param( 'status' )
+		);
+
+		// set images and attributes.
+		$query_results['results'] = array_map(
+			function( $query_result ) {
+				$product                  = wc_get_product( $query_result );
+				$query_result->images     = $this->get_images( $product );
+				$query_result->attributes = $this->get_attributes( $product );
+				return $query_result;
+			},
+			$query_results['results']
+		);
+
+		// set last_order_date.
+		$query_results['results'] = $this->set_last_order_date( $query_results['results'] );
+
+		// convert the post data to the expected API response for the backward compatibility.
+		$query_results['results'] = array_map( array( $this, 'transform_post_to_api_response' ), $query_results['results'] );
+
+		$response = rest_ensure_response( array_values( $query_results['results'] ) );
+		$response->header( 'X-WP-Total', $query_results['total'] );
+		$response->header( 'X-WP-TotalPages', $query_results['pages'] );
+
+		return $response;
+	}
+
+	/**
+	 * Set the last order date for each data.
+	 *
+	 * @param array $results query result from get_low_in_stock_products.
+	 *
+	 * @return mixed
+	 */
+	protected function set_last_order_date( $results = array() ) {
+		global $wpdb;
+		if ( 0 === count( $results ) ) {
+			return $results;
+		}
+
+		$wheres = array();
+		foreach ( $results as $result ) {
+			'product_variation' === $result->post_type ?
+				array_push( $wheres, "(product_id={$result->post_parent} and variation_id={$result->ID})" )
+				: array_push( $wheres, "product_id={$result->ID}" );
+		}
+
+		count( $wheres ) ? $where_clause = implode( ' or ', $wheres ) : $where_clause = $wheres[0];
+
+		$product_lookup_table = $wpdb->prefix . 'wc_order_product_lookup';
+		$query_string         = "
+			select
+				product_id,
+				variation_id,
+				MAX( wc_order_product_lookup.date_created ) AS last_order_date
+			from {$product_lookup_table} wc_order_product_lookup
+			where {$where_clause}
+			group by product_id
+			order by date_created desc
+		";
+
+		// phpcs:ignore -- ignore prepare() warning as we're not using any user input here.
+		$last_order_dates = $wpdb->get_results( $query_string );
+		$last_order_dates_index = array();
+		// Make an index with product_id_variation_id as a key
+		// so that it can be referenced back without looping the whole array.
+		foreach ( $last_order_dates as $last_order_date ) {
+			$last_order_dates_index[ $last_order_date->product_id . '_' . $last_order_date->variation_id ] = $last_order_date;
+		}
+
+		foreach ( $results as &$result ) {
+			'product_variation' === $result->post_type ?
+				$index_key   = $result->post_parent . '_' . $result->ID
+				: $index_key = $result->ID . '_' . $result->post_parent;
+
+			if ( isset( $last_order_dates_index[ $index_key ] ) ) {
+				$result->last_order_date = $last_order_dates_index[ $index_key ]->last_order_date;
+			}
+		}
+
+		return $results;
+	}
+
+	/**
+	 * Get low in stock products data.
+	 *
+	 * @param int    $page current page.
+	 * @param int    $per_page items per page.
+	 * @param string $status post status.
+	 *
+	 * @return array
+	 */
+	protected function get_low_in_stock_products( $page = 1, $per_page = 1, $status = 'publish' ) {
+		global $wpdb;
+
+		$offset              = ( $page - 1 ) * $per_page;
+		$low_stock_threshold = absint( max( get_option( 'woocommerce_notify_low_stock_amount' ), 1 ) );
+
+		$query_string = $this->get_query( $this->is_using_sitewide_stock_threshold_only() );
+
+		$query_results = $wpdb->get_results(
+			// phpcs:ignore -- not sure why phpcs complains about this line when prepare() is used here.
+			$wpdb->prepare( $query_string, $status, $low_stock_threshold, $offset, $per_page ),
+			OBJECT_K
+		);
+
+		$total_results = $wpdb->get_var( 'SELECT FOUND_ROWS()' );
+
+		return array(
+			'results' => $query_results,
+			'total'   => (int) $total_results,
+			'pages'   => (int) ceil( $total_results / (int) $per_page ),
+		);
+	}
+
+	/**
+	 * Check to see if store is using sitewide threshold only. Meaning that it does not have any custom
+	 * stock threshold for a product.
+	 *
+	 * @return bool
+	 */
+	protected function is_using_sitewide_stock_threshold_only() {
+		global $wpdb;
+		$count = $wpdb->get_var( "select count(*) as total from {$wpdb->postmeta} where meta_key='_low_stock_amount'" );
+		return 0 === (int) $count;
+	}
+
+	/**
+	 * Transform post object to expected API response.
+	 *
+	 * @param object $query_result a row of query result from get_low_in_stock_products().
+	 *
+	 * @return array
+	 */
+	protected function transform_post_to_api_response( $query_result ) {
+		$low_stock_amount = null;
+		if ( isset( $query_result->low_stock_amount ) ) {
+			$low_stock_amount = (int) $query_result->low_stock_amount;
+		}
+
+		if ( ! isset( $query_result->last_order_date ) ) {
+			$query_result->last_order_date = null;
+		}
+
+		return array(
+			'id'               => (int) $query_result->ID,
+			'images'           => $query_result->images,
+			'attributes'       => $query_result->attributes,
+			'low_stock_amount' => $low_stock_amount,
+			'last_order_date'  => wc_rest_prepare_date_response( $query_result->last_order_date ),
+			'name'             => $query_result->post_title,
+			'parent_id'        => (int) $query_result->post_parent,
+			'stock_quantity'   => (int) $query_result->stock_quantity,
+			'type'             => 'product_variation' === $query_result->post_type ? 'variation' : 'simple',
+		);
+	}
+
+	/**
+	 * Generate a query.
+	 *
+	 * @param bool $siteside_only generates a query for sitewide low stock threshold only query.
+	 *
+	 * @return string
+	 */
+	protected function get_query( $siteside_only = false ) {
+		global $wpdb;
+		$query = "
+			SELECT
+				SQL_CALC_FOUND_ROWS wp_posts.*,
+				:postmeta_select
+				wc_product_meta_lookup.stock_quantity
+			FROM
+			  {$wpdb->wc_product_meta_lookup} wc_product_meta_lookup
+			  LEFT JOIN {$wpdb->posts} wp_posts ON wp_posts.ID = wc_product_meta_lookup.product_id
+			  :postmeta_join
+			WHERE
+			  wp_posts.post_type IN ('product', 'product_variation')
+			  AND wp_posts.post_status = %s
+			  AND wc_product_meta_lookup.stock_quantity IS NOT NULL
+			  AND wc_product_meta_lookup.stock_status IN('instock', 'outofstock')
+			  :postmeta_wheres
+			order by wc_product_meta_lookup.product_id DESC
+			limit %d, %d
+		";
+
+		$postmeta = array(
+			'select' => '',
+			'join'   => '',
+			'wheres' => 'AND wc_product_meta_lookup.stock_quantity <= %d',
+		);
+
+		if ( ! $siteside_only ) {
+			$postmeta['select'] = 'meta.meta_value AS low_stock_amount,';
+			$postmeta['join']   = "LEFT JOIN {$wpdb->postmeta} AS meta ON wp_posts.ID = meta.post_id
+			  AND meta.meta_key = '_low_stock_amount'";
+			$postmeta['wheres'] = "AND (
+			    (
+			      meta.meta_value > ''
+			      AND wc_product_meta_lookup.stock_quantity <= CAST(
+			        meta.meta_value AS SIGNED
+			      )
+			    )
+			    OR (
+			      (
+			        meta.meta_value IS NULL
+			        OR meta.meta_value <= ''
+			      )
+			      AND wc_product_meta_lookup.stock_quantity <= %d
+			    )
+		    )";
+		}
+
+		return strtr(
+			$query,
+			array(
+				':postmeta_select' => $postmeta['select'],
+				':postmeta_join'   => $postmeta['join'],
+				':postmeta_wheres' => $postmeta['wheres'],
+			)
+		);
+	}
+
+	/**
+	 * Get the query params for collections of attachments.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                       = array();
+		$params['context']            = $this->get_context_param();
+		$params['context']['default'] = 'view';
+
+		$params['page']     = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page'] = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		$params['status'] = array(
+			'default'           => 'publish',
+			'description'       => __( 'Limit result set to products assigned a specific status.', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array_merge( array_keys( get_post_statuses() ), array( 'future' ) ),
+			'sanitize_callback' => 'sanitize_key',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Cache.php

@@ -0,0 +1,77 @@
+<?php
+/**
+ * REST API Reports Cache.
+ *
+ * Handles report data object caching.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Reports Cache class.
+ */
+class Cache {
+	/**
+	 * Cache version. Used to invalidate all cached values.
+	 */
+	const VERSION_OPTION = 'woocommerce_reports';
+
+	/**
+	 * Invalidate cache.
+	 */
+	public static function invalidate() {
+		\WC_Cache_Helper::get_transient_version( self::VERSION_OPTION, true );
+	}
+
+	/**
+	 * Get cache version number.
+	 *
+	 * @return string
+	 */
+	public static function get_version() {
+		$version = \WC_Cache_Helper::get_transient_version( self::VERSION_OPTION );
+
+		return $version;
+	}
+
+	/**
+	 * Get cached value.
+	 *
+	 * @param string $key Cache key.
+	 * @return mixed
+	 */
+	public static function get( $key ) {
+		$transient_version = self::get_version();
+		$transient_value   = get_transient( $key );
+
+		if (
+			isset( $transient_value['value'], $transient_value['version'] ) &&
+			$transient_value['version'] === $transient_version
+		) {
+			return $transient_value['value'];
+		}
+
+		return false;
+	}
+
+	/**
+	 * Update cached value.
+	 *
+	 * @param string $key   Cache key.
+	 * @param mixed  $value New value.
+	 * @return bool
+	 */
+	public static function set( $key, $value ) {
+		$transient_version = self::get_version();
+		$transient_value   = array(
+			'version' => $transient_version,
+			'value'   => $value,
+		);
+
+		$result = set_transient( $key, $transient_value, WEEK_IN_SECONDS );
+
+		return $result;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Categories/Controller.php

@@ -0,0 +1,375 @@
+<?php
+/**
+ * REST API Reports categories controller
+ *
+ * Handles requests to the /reports/categories endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Categories;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Controller as ReportsController;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+
+/**
+ * REST API Reports categories controller class.
+ *
+ * @extends \Automattic\WooCommerce\Admin\API\Reports\Controller
+ */
+class Controller extends ReportsController implements ExportableInterface {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/categories';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                      = array();
+		$args['before']            = $request['before'];
+		$args['after']             = $request['after'];
+		$args['interval']          = $request['interval'];
+		$args['page']              = $request['page'];
+		$args['per_page']          = $request['per_page'];
+		$args['orderby']           = $request['orderby'];
+		$args['order']             = $request['order'];
+		$args['extended_info']     = $request['extended_info'];
+		$args['category_includes'] = (array) $request['categories'];
+		$args['status_is']         = (array) $request['status_is'];
+		$args['status_is_not']     = (array) $request['status_is_not'];
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args       = $this->prepare_reports_query( $request );
+		$categories_query = new Query( $query_args );
+		$report_data      = $categories_query->get_data();
+
+		if ( is_wp_error( $report_data ) ) {
+			return $report_data;
+		}
+
+		if ( ! isset( $report_data->data ) || ! isset( $report_data->page_no ) || ! isset( $report_data->pages ) ) {
+			return new \WP_Error( 'woocommerce_rest_reports_categories_invalid_response', __( 'Invalid response from data store.', 'woocommerce' ), array( 'status' => 500 ) );
+		}
+
+		$out_data = array();
+
+		foreach ( $report_data->data as $datum ) {
+			$item       = $this->prepare_item_for_response( $datum, $request );
+			$out_data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $report ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_categories', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param \Automattic\WooCommerce\Admin\API\Reports\Query $object Object data.
+	 * @return array
+	 */
+	protected function prepare_links( $object ) {
+		$links = array(
+			'category' => array(
+				'href' => rest_url( sprintf( '/%s/products/categories/%d', $this->namespace, $object['category_id'] ) ),
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_categories',
+			'type'       => 'object',
+			'properties' => array(
+				'category_id'    => array(
+					'description' => __( 'Category ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'items_sold'     => array(
+					'description' => __( 'Amount of items sold.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'net_revenue'    => array(
+					'description' => __( 'Total sales.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'orders_count'   => array(
+					'description' => __( 'Number of orders.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'products_count' => array(
+					'description' => __( 'Amount of products.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'extended_info'  => array(
+					'name' => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Category name.', 'woocommerce' ),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                  = array();
+		$params['context']       = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']          = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']      = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']         = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']        = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']         = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']       = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'category_id',
+			'enum'              => array(
+				'category_id',
+				'items_sold',
+				'net_revenue',
+				'orders_count',
+				'products_count',
+				'category',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']      = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['status_is']     = array(
+			'description'       => __( 'Limit result set to items that have the specified order status.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'enum' => self::get_order_statuses(),
+				'type' => 'string',
+			),
+		);
+		$params['status_is_not'] = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified order status.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'enum' => self::get_order_statuses(),
+				'type' => 'string',
+			),
+		);
+		$params['categories']    = array(
+			'description'       => __( 'Limit result set to all items that have the specified term assigned in the categories taxonomy.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['extended_info'] = array(
+			'description'       => __( 'Add additional piece of info about each category to the report.', 'woocommerce' ),
+			'type'              => 'boolean',
+			'default'           => false,
+			'sanitize_callback' => 'wc_string_to_bool',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'category'       => __( 'Category', 'woocommerce' ),
+			'items_sold'     => __( 'Items sold', 'woocommerce' ),
+			'net_revenue'    => __( 'Net Revenue', 'woocommerce' ),
+			'products_count' => __( 'Products', 'woocommerce' ),
+			'orders_count'   => __( 'Orders', 'woocommerce' ),
+		);
+
+		/**
+		 * Filter to add or remove column names from the categories report for
+		 * export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_categories_export_columns',
+			$export_columns
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$export_item = array(
+			'category'       => $item['extended_info']['name'],
+			'items_sold'     => $item['items_sold'],
+			'net_revenue'    => $item['net_revenue'],
+			'products_count' => $item['products_count'],
+			'orders_count'   => $item['orders_count'],
+		);
+
+		/**
+		 * Filter to prepare extra columns in the export item for the
+		 * categories export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_categories_prepare_export_item',
+			$export_item,
+			$item
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Categories/DataStore.php

@@ -0,0 +1,306 @@
+<?php
+/**
+ * API\Reports\Categories\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Categories;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Categories\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_product_lookup';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'categories';
+
+	/**
+	 * Order by setting used for sorting categories data.
+	 *
+	 * @var string
+	 */
+	private $order_by = '';
+
+	/**
+	 * Order setting used for sorting categories data.
+	 *
+	 * @var string
+	 */
+	private $order = '';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'category_id'    => 'intval',
+		'items_sold'     => 'intval',
+		'net_revenue'    => 'floatval',
+		'orders_count'   => 'intval',
+		'products_count' => 'intval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'categories';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'items_sold'     => 'SUM(product_qty) as items_sold',
+			'net_revenue'    => 'SUM(product_net_revenue) AS net_revenue',
+			'orders_count'   => "COUNT(DISTINCT {$table_name}.order_id) as orders_count",
+			'products_count' => "COUNT(DISTINCT {$table_name}.product_id) as products_count",
+		);
+	}
+
+	/**
+	 * Return the database query with parameters used for Categories report: time span and order status.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+		$order_product_lookup_table = self::get_db_table_name();
+
+		$this->add_time_period_sql_params( $query_args, $order_product_lookup_table );
+
+		// join wp_order_product_lookup_table with relationships and taxonomies
+		// @todo How to handle custom product tables?
+		$this->subquery->add_sql_clause( 'left_join', "LEFT JOIN {$wpdb->term_relationships} ON {$order_product_lookup_table}.product_id = {$wpdb->term_relationships}.object_id" );
+		// Adding this (inner) JOIN as a LEFT JOIN for ordering purposes. See comment in add_order_by_params().
+		$this->subquery->add_sql_clause( 'left_join', "JOIN {$wpdb->term_taxonomy} ON {$wpdb->term_taxonomy}.term_taxonomy_id = {$wpdb->term_relationships}.term_taxonomy_id" );
+		$this->subquery->add_sql_clause( 'left_join', "LEFT JOIN {$wpdb->wc_category_lookup} ON {$wpdb->term_taxonomy}.term_id = {$wpdb->wc_category_lookup}.category_id" );
+
+		$included_categories = $this->get_included_categories( $query_args );
+		if ( $included_categories ) {
+			$this->subquery->add_sql_clause( 'where', "AND {$wpdb->wc_category_lookup}.category_tree_id IN ({$included_categories})" );
+
+			// Limit is left out here so that the grouping in code by PHP can be applied correctly.
+			// This also needs to be put after the term_taxonomy JOIN so that we can match the correct term name.
+			$this->add_order_by_params( $query_args, 'outer', 'default_results.category_id' );
+		} else {
+			$this->add_order_by_params( $query_args, 'inner', "{$wpdb->wc_category_lookup}.category_tree_id" );
+		}
+
+		$this->add_order_status_clause( $query_args, $order_product_lookup_table, $this->subquery );
+		$this->subquery->add_sql_clause( 'where', "AND {$wpdb->wc_category_lookup}.category_tree_id IS NOT NULL" );
+	}
+
+	/**
+	 * Fills ORDER BY clause of SQL request based on user supplied parameters.
+	 *
+	 * @param array  $query_args Parameters supplied by the user.
+	 * @param string $from_arg   Target of the JOIN sql param.
+	 * @param string $id_cell    ID cell identifier, like `table_name.id_column_name`.
+	 */
+	protected function add_order_by_params( $query_args, $from_arg, $id_cell ) {
+		global $wpdb;
+		$lookup_table    = self::get_db_table_name();
+		$order_by_clause = $this->add_order_by_clause( $query_args, $this );
+		$this->add_orderby_order_clause( $query_args, $this );
+
+		if ( false !== strpos( $order_by_clause, '_terms' ) ) {
+			$join = "JOIN {$wpdb->terms} AS _terms ON {$id_cell} = _terms.term_id";
+			if ( 'inner' === $from_arg ) {
+				// Even though this is an (inner) JOIN, we're adding it as a `left_join` to
+				// affect its order in the query statement. The SqlQuery::$sql_filters variable
+				// determines the order in which joins are concatenated.
+				// See: https://github.com/woocommerce/woocommerce-admin/blob/1f261998e7287b77bc13c3d4ee2e84b717da7957/src/API/Reports/SqlQuery.php#L46-L50.
+				$this->subquery->add_sql_clause( 'left_join', $join );
+			} else {
+				$this->add_sql_clause( 'join', $join );
+			}
+		}
+	}
+
+	/**
+	 * Maps ordering specified by the user to columns in the database/fields in the data.
+	 *
+	 * @param string $order_by Sorting criterion.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return 'time_interval';
+		}
+		if ( 'category' === $order_by ) {
+			return '_terms.name';
+		}
+		return $order_by;
+	}
+
+	/**
+	 * Returns an array of ids of included categories, based on query arguments from the user.
+	 *
+	 * @param array $query_args Parameters supplied by the user.
+	 * @return string
+	 */
+	protected function get_included_categories_array( $query_args ) {
+		if ( isset( $query_args['category_includes'] ) && is_array( $query_args['category_includes'] ) && count( $query_args['category_includes'] ) > 0 ) {
+			return $query_args['category_includes'];
+		}
+		return array();
+	}
+
+	/**
+	 * Returns the page of data according to page number and items per page.
+	 *
+	 * @param array   $data           Data to paginate.
+	 * @param integer $page_no        Page number.
+	 * @param integer $items_per_page Number of items per page.
+	 * @return array
+	 */
+	protected function page_records( $data, $page_no, $items_per_page ) {
+		$offset = ( $page_no - 1 ) * $items_per_page;
+		return array_slice( $data, $offset, $items_per_page );
+	}
+
+	/**
+	 * Enriches the category data.
+	 *
+	 * @param array $categories_data Categories data.
+	 * @param array $query_args  Query parameters.
+	 */
+	protected function include_extended_info( &$categories_data, $query_args ) {
+		foreach ( $categories_data as $key => $category_data ) {
+			$extended_info = new \ArrayObject();
+			if ( $query_args['extended_info'] ) {
+				$extended_info['name'] = get_the_category_by_ID( $category_data['category_id'] );
+			}
+			$categories_data[ $key ]['extended_info'] = $extended_info;
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'          => get_option( 'posts_per_page' ),
+			'page'              => 1,
+			'order'             => 'DESC',
+			'orderby'           => 'date',
+			'before'            => TimeInterval::default_before(),
+			'after'             => TimeInterval::default_after(),
+			'fields'            => '*',
+			'category_includes' => array(),
+			'extended_info'     => false,
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$this->subquery->add_sql_clause( 'select', $this->selected_columns( $query_args ) );
+			$included_categories = $this->get_included_categories_array( $query_args );
+			$this->add_sql_query_params( $query_args );
+
+			if ( count( $included_categories ) > 0 ) {
+				$fields    = $this->get_fields( $query_args );
+				$ids_table = $this->get_ids_table( $included_categories, 'category_id' );
+
+				$this->add_sql_clause( 'select', $this->format_join_selections( array_merge( array( 'category_id' ), $fields ), array( 'category_id' ) ) );
+				$this->add_sql_clause( 'from', '(' );
+				$this->add_sql_clause( 'from', $this->subquery->get_query_statement() );
+				$this->add_sql_clause( 'from', ") AS {$table_name}" );
+				$this->add_sql_clause(
+					'right_join',
+					"RIGHT JOIN ( {$ids_table} ) AS default_results
+					ON default_results.category_id = {$table_name}.category_id"
+				);
+
+				$categories_query = $this->get_query_statement();
+			} else {
+				$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+				$categories_query = $this->subquery->get_query_statement();
+			}
+			$categories_data = $wpdb->get_results(
+				$categories_query,
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $categories_data ) {
+				return new \WP_Error( 'woocommerce_analytics_categories_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ), array( 'status' => 500 ) );
+			}
+
+			$record_count = count( $categories_data );
+			$total_pages  = (int) ceil( $record_count / $query_args['per_page'] );
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return $data;
+			}
+
+			$categories_data = $this->page_records( $categories_data, $query_args['page'], $query_args['per_page'] );
+			$this->include_extended_info( $categories_data, $query_args );
+			$categories_data = array_map( array( $this, 'cast_numbers' ), $categories_data );
+			$data            = (object) array(
+				'data'    => $categories_data,
+				'total'   => $record_count,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		global $wpdb;
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'select', "{$wpdb->wc_category_lookup}.category_tree_id as category_id," );
+		$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->subquery->add_sql_clause( 'group_by', "{$wpdb->wc_category_lookup}.category_tree_id" );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Categories/Query.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Class for parameter-based Categories Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'page'         => 2,
+ *          'order'        => 'desc',
+ *          'orderby'      => 'items_sold',
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Categories\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Categories;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Query
+ */
+class Query extends ReportsQuery {
+
+	const REPORT_NAME = 'report-categories';
+
+	/**
+	 * Valid fields for Categories report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get categories data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args    = apply_filters( 'woocommerce_analytics_categories_query_args', $this->get_query_vars() );
+		$results = \WC_Data_Store::load( self::REPORT_NAME )->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_categories_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Controller.php

@@ -0,0 +1,356 @@
+<?php
+/**
+ * REST API Reports controller extended by WC Admin plugin.
+ *
+ * Handles requests to the reports endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Reports controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports';
+
+	/**
+	 * Register the routes for reports.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Check whether a given request has permission to read reports.
+	 *
+	 * @param  WP_REST_Request $request Full details about the request.
+	 * @return WP_Error|boolean
+	 */
+	public function get_items_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'reports', 'read' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$data    = array();
+		$reports = array(
+			array(
+				'slug'        => 'performance-indicators',
+				'description' => __( 'Batch endpoint for getting specific performance indicators from `stats` endpoints.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'revenue/stats',
+				'description' => __( 'Stats about revenue.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'orders/stats',
+				'description' => __( 'Stats about orders.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'products',
+				'description' => __( 'Products detailed reports.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'products/stats',
+				'description' => __( 'Stats about products.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'variations',
+				'description' => __( 'Variations detailed reports.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'variations/stats',
+				'description' => __( 'Stats about variations.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'categories',
+				'description' => __( 'Product categories detailed reports.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'categories/stats',
+				'description' => __( 'Stats about product categories.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'coupons',
+				'description' => __( 'Coupons detailed reports.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'coupons/stats',
+				'description' => __( 'Stats about coupons.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'taxes',
+				'description' => __( 'Taxes detailed reports.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'taxes/stats',
+				'description' => __( 'Stats about taxes.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'downloads',
+				'description' => __( 'Product downloads detailed reports.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'downloads/files',
+				'description' => __( 'Product download files detailed reports.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'downloads/stats',
+				'description' => __( 'Stats about product downloads.', 'woocommerce' ),
+			),
+			array(
+				'slug'        => 'customers',
+				'description' => __( 'Customers detailed reports.', 'woocommerce' ),
+			),
+		);
+
+		/**
+		 * Filter the list of allowed reports, so that data can be loaded from third party extensions in addition to WooCommerce core.
+		 * Array items should be in format of array( 'slug' => 'downloads/stats', 'description' =>  '',
+		 * 'url' => '', and 'path' => '/wc-ext/v1/...'.
+		 *
+		 * @param array $endpoints The list of allowed reports..
+		 */
+		$reports = apply_filters( 'woocommerce_admin_reports', $reports );
+
+		foreach ( $reports as $report ) {
+			if ( empty( $report['slug'] ) ) {
+				continue;
+			}
+
+			if ( empty( $report['path'] ) ) {
+				$report['path'] = '/' . $this->namespace . '/reports/' . $report['slug'];
+			}
+
+			// Allows a different admin page to be loaded here,
+			// or allows an empty url if no report exists for a set of performance indicators.
+			if ( ! isset( $report['url'] ) ) {
+				if ( '/stats' === substr( $report['slug'], -6 ) ) {
+					$url_slug = substr( $report['slug'], 0, -6 );
+				} else {
+					$url_slug = $report['slug'];
+				}
+
+				$report['url'] = '/analytics/' . $url_slug;
+			}
+
+			$item   = $this->prepare_item_for_response( (object) $report, $request );
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Get the order number for an order. If no filter is present for `woocommerce_order_number`, we can just return the ID.
+	 * Returns the parent order number if the order is actually a refund.
+	 *
+	 * @param  int $order_id Order ID.
+	 * @return string
+	 */
+	public function get_order_number( $order_id ) {
+		$order = wc_get_order( $order_id );
+
+		if ( ! $order instanceof \WC_Order && ! $order instanceof \WC_Order_Refund ) {
+			return null;
+		}
+
+		if ( 'shop_order_refund' === $order->get_type() ) {
+			$order = wc_get_order( $order->get_parent_id() );
+		}
+
+		if ( ! has_filter( 'woocommerce_order_number' ) ) {
+			return $order->get_id();
+		}
+
+		return $order->get_order_number();
+	}
+
+	/**
+	 * Get the order total with the related currency formatting.
+	 * Returns the parent order total if the order is actually a refund.
+	 *
+	 * @param  int $order_id Order ID.
+	 * @return string
+	 */
+	public function get_total_formatted( $order_id ) {
+		$order = wc_get_order( $order_id );
+
+		if ( ! $order instanceof \WC_Order && ! $order instanceof \WC_Order_Refund ) {
+			return null;
+		}
+
+		if ( 'shop_order_refund' === $order->get_type() ) {
+			$order = wc_get_order( $order->get_parent_id() );
+		}
+
+		return wp_strip_all_tags( html_entity_decode( $order->get_formatted_order_total() ), true );
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = array(
+			'slug'        => $report->slug,
+			'description' => $report->description,
+			'path'        => $report->path,
+		);
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links(
+			array(
+				'self'       => array(
+					'href' => rest_url( $report->path ),
+				),
+				'report'     => array(
+					'href' => $report->url,
+				),
+				'collection' => array(
+					'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
+				),
+			)
+		);
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report',
+			'type'       => 'object',
+			'properties' => array(
+				'slug'        => array(
+					'description' => __( 'An alphanumeric identifier for the resource.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'description' => array(
+					'description' => __( 'A human-readable description of the resource.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+				'path'        => array(
+					'description' => __( 'API path.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		return array(
+			'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+		);
+	}
+
+	/**
+	 * Get order statuses without prefixes.
+	 * Includes unregistered statuses that have been marked "actionable".
+	 *
+	 * @return array
+	 */
+	public static function get_order_statuses() {
+		// Allow all statuses selected as "actionable" - this may include unregistered statuses.
+		// See: https://github.com/woocommerce/woocommerce-admin/issues/5592.
+		$actionable_statuses = get_option( 'woocommerce_actionable_order_statuses', array() );
+
+		// See WC_REST_Orders_V2_Controller::get_collection_params() re: any/trash statuses.
+		$registered_statuses = array_merge( array( 'any', 'trash' ), array_keys( self::get_order_status_labels() ) );
+
+		// Merge the status arrays (using flip to avoid array_unique()).
+		$allowed_statuses = array_keys( array_merge( array_flip( $registered_statuses ), array_flip( $actionable_statuses ) ) );
+
+		return $allowed_statuses;
+	}
+
+	/**
+	 * Get order statuses (and labels) without prefixes.
+	 *
+	 * @return array
+	 */
+	public static function get_order_status_labels() {
+		$order_statuses = array();
+
+		foreach ( wc_get_order_statuses() as $key => $label ) {
+			$new_key                    = str_replace( 'wc-', '', $key );
+			$order_statuses[ $new_key ] = $label;
+		}
+
+		return $order_statuses;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Coupons/Controller.php

@@ -0,0 +1,351 @@
+<?php
+/**
+ * REST API Reports coupons controller
+ *
+ * Handles requests to the /reports/coupons endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Coupons;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+
+/**
+ * REST API Reports coupons controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller implements ExportableInterface {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/coupons';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                  = array();
+		$args['before']        = $request['before'];
+		$args['after']         = $request['after'];
+		$args['page']          = $request['page'];
+		$args['per_page']      = $request['per_page'];
+		$args['orderby']       = $request['orderby'];
+		$args['order']         = $request['order'];
+		$args['coupons']       = (array) $request['coupons'];
+		$args['extended_info'] = $request['extended_info'];
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args    = $this->prepare_reports_query( $request );
+		$coupons_query = new Query( $query_args );
+		$report_data   = $coupons_query->get_data();
+
+		$data = array();
+
+		foreach ( $report_data->data as $coupons_data ) {
+			$item   = $this->prepare_item_for_response( $coupons_data, $request );
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $report ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_coupons', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param WC_Reports_Query $object Object data.
+	 * @return array
+	 */
+	protected function prepare_links( $object ) {
+		$links = array(
+			'coupon' => array(
+				'href' => rest_url( sprintf( '/%s/coupons/%d', $this->namespace, $object['coupon_id'] ) ),
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_coupons',
+			'type'       => 'object',
+			'properties' => array(
+				'coupon_id'     => array(
+					'description' => __( 'Coupon ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'amount'        => array(
+					'description' => __( 'Net discount amount.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'orders_count'  => array(
+					'description' => __( 'Number of orders.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'extended_info' => array(
+					'code'             => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Coupon code.', 'woocommerce' ),
+					),
+					'date_created'     => array(
+						'type'        => 'date-time',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Coupon creation date.', 'woocommerce' ),
+					),
+					'date_created_gmt' => array(
+						'type'        => 'date-time',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Coupon creation date in GMT.', 'woocommerce' ),
+					),
+					'date_expires'     => array(
+						'type'        => 'date-time',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Coupon expiration date.', 'woocommerce' ),
+					),
+					'date_expires_gmt' => array(
+						'type'        => 'date-time',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Coupon expiration date in GMT.', 'woocommerce' ),
+					),
+					'discount_type'    => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'enum'        => array_keys( wc_get_coupon_types() ),
+						'description' => __( 'Coupon discount type.', 'woocommerce' ),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                  = array();
+		$params['context']       = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']          = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']      = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']         = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']        = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']         = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']       = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'coupon_id',
+			'enum'              => array(
+				'coupon_id',
+				'code',
+				'amount',
+				'orders_count',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['coupons']       = array(
+			'description'       => __( 'Limit result set to coupons assigned specific coupon IDs.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['extended_info'] = array(
+			'description'       => __( 'Add additional piece of info about each coupon to the report.', 'woocommerce' ),
+			'type'              => 'boolean',
+			'default'           => false,
+			'sanitize_callback' => 'wc_string_to_bool',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'code'         => __( 'Coupon code', 'woocommerce' ),
+			'orders_count' => __( 'Orders', 'woocommerce' ),
+			'amount'       => __( 'Amount discounted', 'woocommerce' ),
+			'created'      => __( 'Created', 'woocommerce' ),
+			'expires'      => __( 'Expires', 'woocommerce' ),
+			'type'         => __( 'Type', 'woocommerce' ),
+		);
+
+		/**
+		 * Filter to add or remove column names from the coupons report for
+		 * export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_coupons_export_columns',
+			$export_columns
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$date_expires = empty( $item['extended_info']['date_expires'] )
+			? __( 'N/A', 'woocommerce' )
+			: $item['extended_info']['date_expires'];
+
+		$export_item = array(
+			'code'         => $item['extended_info']['code'],
+			'orders_count' => $item['orders_count'],
+			'amount'       => $item['amount'],
+			'created'      => $item['extended_info']['date_created'],
+			'expires'      => $date_expires,
+			'type'         => $item['extended_info']['discount_type'],
+		);
+
+		/**
+		 * Filter to prepare extra columns in the export item for the coupons
+		 * report.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_coupons_prepare_export_item',
+			$export_item,
+			$item
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Coupons/DataStore.php

@@ -0,0 +1,487 @@
+<?php
+/**
+ * API\Reports\Coupons\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Coupons;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+use \Automattic\WooCommerce\Admin\API\Reports\Cache as ReportsCache;
+
+/**
+ * API\Reports\Coupons\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_coupon_lookup';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'coupons';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'coupon_id'    => 'intval',
+		'amount'       => 'floatval',
+		'orders_count' => 'intval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'coupons';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'coupon_id'    => 'coupon_id',
+			'amount'       => 'SUM(discount_amount) as amount',
+			'orders_count' => "COUNT(DISTINCT {$table_name}.order_id) as orders_count",
+		);
+	}
+
+	/**
+	 * Set up all the hooks for maintaining and populating table data.
+	 */
+	public static function init() {
+		add_action( 'woocommerce_analytics_delete_order_stats', array( __CLASS__, 'sync_on_order_delete' ), 5 );
+	}
+
+	/**
+	 * Returns an array of ids of included coupons, based on query arguments from the user.
+	 *
+	 * @param array $query_args Parameters supplied by the user.
+	 * @return array
+	 */
+	protected function get_included_coupons_array( $query_args ) {
+		if ( isset( $query_args['coupons'] ) && is_array( $query_args['coupons'] ) && count( $query_args['coupons'] ) > 0 ) {
+			return $query_args['coupons'];
+		}
+		return array();
+	}
+
+	/**
+	 * Updates the database query with parameters used for Products report: categories and order status.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+		$order_coupon_lookup_table = self::get_db_table_name();
+
+		$this->add_time_period_sql_params( $query_args, $order_coupon_lookup_table );
+		$this->get_limit_sql_params( $query_args );
+
+		$included_coupons = $this->get_included_coupons( $query_args, 'coupons' );
+		if ( $included_coupons ) {
+			$this->subquery->add_sql_clause( 'where', "AND {$order_coupon_lookup_table}.coupon_id IN ({$included_coupons})" );
+
+			$this->add_order_by_params( $query_args, 'outer', 'default_results.coupon_id' );
+		} else {
+			$this->add_order_by_params( $query_args, 'inner', "{$order_coupon_lookup_table}.coupon_id" );
+		}
+
+		$this->add_order_status_clause( $query_args, $order_coupon_lookup_table, $this->subquery );
+	}
+
+	/**
+	 * Fills ORDER BY clause of SQL request based on user supplied parameters.
+	 *
+	 * @param array  $query_args Parameters supplied by the user.
+	 * @param string $from_arg   Target of the JOIN sql param.
+	 * @param string $id_cell    ID cell identifier, like `table_name.id_column_name`.
+	 */
+	protected function add_order_by_params( $query_args, $from_arg, $id_cell ) {
+		global $wpdb;
+		$lookup_table    = self::get_db_table_name();
+		$order_by_clause = $this->add_order_by_clause( $query_args, $this );
+		$join            = "JOIN {$wpdb->posts} AS _coupons ON {$id_cell} = _coupons.ID";
+		$this->add_orderby_order_clause( $query_args, $this );
+
+		if ( 'inner' === $from_arg ) {
+			$this->subquery->clear_sql_clause( 'join' );
+			if ( false !== strpos( $order_by_clause, '_coupons' ) ) {
+				$this->subquery->add_sql_clause( 'join', $join );
+			}
+		} else {
+			$this->clear_sql_clause( 'join' );
+			if ( false !== strpos( $order_by_clause, '_coupons' ) ) {
+				$this->add_sql_clause( 'join', $join );
+			}
+		}
+	}
+
+	/**
+	 * Maps ordering specified by the user to columns in the database/fields in the data.
+	 *
+	 * @param string $order_by Sorting criterion.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return 'time_interval';
+		}
+		if ( 'code' === $order_by ) {
+			return '_coupons.post_title';
+		}
+		return $order_by;
+	}
+
+	/**
+	 * Enriches the coupon data with extra attributes.
+	 *
+	 * @param array $coupon_data Coupon data.
+	 * @param array $query_args Query parameters.
+	 */
+	protected function include_extended_info( &$coupon_data, $query_args ) {
+		foreach ( $coupon_data as $idx => $coupon_datum ) {
+			$extended_info = new \ArrayObject();
+			if ( $query_args['extended_info'] ) {
+				$coupon_id = $coupon_datum['coupon_id'];
+				$coupon    = new \WC_Coupon( $coupon_id );
+
+				if ( 0 === $coupon->get_id() ) {
+					// Deleted or otherwise invalid coupon.
+					$extended_info = array(
+						'code'             => __( '(Deleted)', 'woocommerce' ),
+						'date_created'     => '',
+						'date_created_gmt' => '',
+						'date_expires'     => '',
+						'date_expires_gmt' => '',
+						'discount_type'    => __( 'N/A', 'woocommerce' ),
+					);
+				} else {
+					$gmt_timzone = new \DateTimeZone( 'UTC' );
+
+					$date_expires = $coupon->get_date_expires();
+					if ( is_a( $date_expires, 'DateTime' ) ) {
+						$date_expires     = $date_expires->format( TimeInterval::$iso_datetime_format );
+						$date_expires_gmt = new \DateTime( $date_expires );
+						$date_expires_gmt->setTimezone( $gmt_timzone );
+						$date_expires_gmt = $date_expires_gmt->format( TimeInterval::$iso_datetime_format );
+					} else {
+						$date_expires     = '';
+						$date_expires_gmt = '';
+					}
+
+					$date_created = $coupon->get_date_created();
+					if ( is_a( $date_created, 'DateTime' ) ) {
+						$date_created     = $date_created->format( TimeInterval::$iso_datetime_format );
+						$date_created_gmt = new \DateTime( $date_created );
+						$date_created_gmt->setTimezone( $gmt_timzone );
+						$date_created_gmt = $date_created_gmt->format( TimeInterval::$iso_datetime_format );
+					} else {
+						$date_created     = '';
+						$date_created_gmt = '';
+					}
+
+					$extended_info = array(
+						'code'             => $coupon->get_code(),
+						'date_created'     => $date_created,
+						'date_created_gmt' => $date_created_gmt,
+						'date_expires'     => $date_expires,
+						'date_expires_gmt' => $date_expires_gmt,
+						'discount_type'    => $coupon->get_discount_type(),
+					);
+				}
+			}
+			$coupon_data[ $idx ]['extended_info'] = $extended_info;
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'      => get_option( 'posts_per_page' ),
+			'page'          => 1,
+			'order'         => 'DESC',
+			'orderby'       => 'coupon_id',
+			'before'        => TimeInterval::default_before(),
+			'after'         => TimeInterval::default_after(),
+			'fields'        => '*',
+			'coupons'       => array(),
+			'extended_info' => false,
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$selections       = $this->selected_columns( $query_args );
+			$included_coupons = $this->get_included_coupons_array( $query_args );
+			$limit_params     = $this->get_limit_params( $query_args );
+			$this->subquery->add_sql_clause( 'select', $selections );
+			$this->add_sql_query_params( $query_args );
+
+			if ( count( $included_coupons ) > 0 ) {
+				$total_results = count( $included_coupons );
+				$total_pages   = (int) ceil( $total_results / $limit_params['per_page'] );
+
+				$fields    = $this->get_fields( $query_args );
+				$ids_table = $this->get_ids_table( $included_coupons, 'coupon_id' );
+
+				$this->add_sql_clause( 'select', $this->format_join_selections( $fields, array( 'coupon_id' ) ) );
+				$this->add_sql_clause( 'from', '(' );
+				$this->add_sql_clause( 'from', $this->subquery->get_query_statement() );
+				$this->add_sql_clause( 'from', ") AS {$table_name}" );
+				$this->add_sql_clause(
+					'right_join',
+					"RIGHT JOIN ( {$ids_table} ) AS default_results
+					ON default_results.coupon_id = {$table_name}.coupon_id"
+				);
+
+				$coupons_query = $this->get_query_statement();
+			} else {
+				$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+				$this->subquery->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+				$coupons_query = $this->subquery->get_query_statement();
+
+				$this->subquery->clear_sql_clause( array( 'select', 'order_by' ) );
+				$this->subquery->add_sql_clause( 'select', 'coupon_id' );
+				$coupon_subquery = "SELECT COUNT(*) FROM (
+					{$this->subquery->get_query_statement()}
+				) AS tt";
+
+				$db_records_count = (int) $wpdb->get_var(
+					$coupon_subquery // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+				);
+
+				$total_results = $db_records_count;
+				$total_pages   = (int) ceil( $db_records_count / $limit_params['per_page'] );
+				if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+					return $data;
+				}
+			}
+
+			$coupon_data = $wpdb->get_results(
+				$coupons_query, // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+				ARRAY_A
+			);
+			if ( null === $coupon_data ) {
+				return $data;
+			}
+
+			$this->include_extended_info( $coupon_data, $query_args );
+
+			$coupon_data = array_map( array( $this, 'cast_numbers' ), $coupon_data );
+			$data        = (object) array(
+				'data'    => $coupon_data,
+				'total'   => $total_results,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Get coupon ID for an order.
+	 *
+	 * Tries to get the ID from order item meta, then falls back to a query of published coupons.
+	 *
+	 * @param \WC_Order_Item_Coupon $coupon_item The coupon order item object.
+	 * @return int Coupon ID on success, 0 on failure.
+	 */
+	public static function get_coupon_id( \WC_Order_Item_Coupon $coupon_item ) {
+		// First attempt to get coupon ID from order item data.
+		$coupon_data = $coupon_item->get_meta( 'coupon_data', true );
+
+		// Normal checkout orders should have this data.
+		// See: https://github.com/woocommerce/woocommerce/blob/3dc7df7af9f7ca0c0aa34ede74493e856f276abe/includes/abstracts/abstract-wc-order.php#L1206.
+		if ( isset( $coupon_data['id'] ) ) {
+			return $coupon_data['id'];
+		}
+
+		// Try to get the coupon ID using the code.
+		return wc_get_coupon_id_by_code( $coupon_item->get_code() );
+	}
+
+	/**
+	 * Create or update an an entry in the wc_order_coupon_lookup table for an order.
+	 *
+	 * @since 3.5.0
+	 * @param int $order_id Order ID.
+	 * @return int|bool Returns -1 if order won't be processed, or a boolean indicating processing success.
+	 */
+	public static function sync_order_coupons( $order_id ) {
+		global $wpdb;
+
+		$order = wc_get_order( $order_id );
+
+		if ( ! $order ) {
+			return -1;
+		}
+
+		// Refunds don't affect coupon stats so return successfully if one is called here.
+		if ( 'shop_order_refund' === $order->get_type() ) {
+			return true;
+		}
+
+		$table_name     = self::get_db_table_name();
+		$existing_items = $wpdb->get_col(
+			$wpdb->prepare(
+				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT coupon_id FROM {$table_name} WHERE order_id = %d",
+				$order_id
+			)
+		);
+		$existing_items     = array_flip( $existing_items );
+		$coupon_items       = $order->get_items( 'coupon' );
+		$coupon_items_count = count( $coupon_items );
+		$num_updated        = 0;
+		$num_deleted        = 0;
+
+		foreach ( $coupon_items as $coupon_item ) {
+			$coupon_id = self::get_coupon_id( $coupon_item );
+			unset( $existing_items[ $coupon_id ] );
+
+			if ( ! $coupon_id ) {
+				// Insert a unique, but obviously invalid ID for this deleted coupon.
+				$num_deleted++;
+				$coupon_id = -1 * $num_deleted;
+			}
+
+			$result = $wpdb->replace(
+				self::get_db_table_name(),
+				array(
+					'order_id'        => $order_id,
+					'coupon_id'       => $coupon_id,
+					'discount_amount' => $coupon_item->get_discount(),
+					'date_created'    => $order->get_date_created( 'edit' )->date( TimeInterval::$sql_datetime_format ),
+				),
+				array(
+					'%d',
+					'%d',
+					'%f',
+					'%s',
+				)
+			);
+
+			/**
+			 * Fires when coupon's reports are updated.
+			 *
+			 * @param int $coupon_id Coupon ID.
+			 * @param int $order_id  Order ID.
+			 */
+			do_action( 'woocommerce_analytics_update_coupon', $coupon_id, $order_id );
+
+			// Sum the rows affected. Using REPLACE can affect 2 rows if the row already exists.
+			$num_updated += 2 === intval( $result ) ? 1 : intval( $result );
+		}
+
+		if ( ! empty( $existing_items ) ) {
+			$existing_items = array_flip( $existing_items );
+			$format         = array_fill( 0, count( $existing_items ), '%d' );
+			$format         = implode( ',', $format );
+			array_unshift( $existing_items, $order_id );
+			$wpdb->query(
+				$wpdb->prepare(
+					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+					"DELETE FROM {$table_name} WHERE order_id = %d AND coupon_id in ({$format})",
+					$existing_items
+				)
+			);
+		}
+
+		return ( $coupon_items_count === $num_updated );
+	}
+
+	/**
+	 * Clean coupons data when an order is deleted.
+	 *
+	 * @param int $order_id Order ID.
+	 */
+	public static function sync_on_order_delete( $order_id ) {
+		global $wpdb;
+
+		$wpdb->delete( self::get_db_table_name(), array( 'order_id' => $order_id ) );
+		/**
+		 * Fires when coupon's reports are removed from database.
+		 *
+		 * @param int $coupon_id Coupon ID.
+		 * @param int $order_id  Order ID.
+		 */
+		do_action( 'woocommerce_analytics_delete_coupon', 0, $order_id );
+
+		ReportsCache::invalidate();
+	}
+
+	/**
+	 * Gets coupons based on the provided arguments.
+	 *
+	 * @todo Upon core merge, including this in core's `class-wc-coupon-data-store-cpt.php` might make more sense.
+	 * @param array $args Array of args to filter the query by. Supports `include`.
+	 * @return array Array of results.
+	 */
+	public function get_coupons( $args ) {
+		global $wpdb;
+		$query = "SELECT ID, post_title FROM {$wpdb->posts} WHERE post_type='shop_coupon'";
+
+		$included_coupons = $this->get_included_coupons( $args, 'include' );
+		if ( ! empty( $included_coupons ) ) {
+			$query .= " AND ID IN ({$included_coupons})";
+		}
+
+		return $wpdb->get_results( $query ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->subquery->add_sql_clause( 'group_by', 'coupon_id' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Coupons/Query.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Class for parameter-based Coupons Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'  => '2018-07-19 00:00:00',
+ *          'after'   => '2018-07-05 00:00:00',
+ *          'page'    => 2,
+ *          'coupons' => array(5, 120),
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Coupons\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Coupons;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Coupons\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Products report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_coupons_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-coupons' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_coupons_select_query', $results, $args );
+	}
+
+}

packages/woocommerce-admin/src/API/Reports/Coupons/Stats/Controller.php

@@ -0,0 +1,365 @@
+<?php
+/**
+ * REST API Reports coupons stats controller
+ *
+ * Handles requests to the /reports/coupons/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Coupons\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * REST API Reports coupons stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/coupons/stats';
+
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args              = array();
+		$args['before']    = $request['before'];
+		$args['after']     = $request['after'];
+		$args['interval']  = $request['interval'];
+		$args['page']      = $request['page'];
+		$args['per_page']  = $request['per_page'];
+		$args['orderby']   = $request['orderby'];
+		$args['order']     = $request['order'];
+		$args['coupons']   = (array) $request['coupons'];
+		$args['segmentby'] = $request['segmentby'];
+		$args['fields']    = $request['fields'];
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args    = $this->prepare_reports_query( $request );
+		$coupons_query = new Query( $query_args );
+		try {
+			$report_data = $coupons_query->get_data();
+		} catch ( ParameterException $e ) {
+			return new \WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
+		}
+
+		$out_data = array(
+			'totals'    => get_object_vars( $report_data->totals ),
+			'intervals' => array(),
+		);
+
+		foreach ( $report_data->intervals as $interval_data ) {
+			$item                    = $this->prepare_item_for_response( (object) $interval_data, $request );
+			$out_data['intervals'][] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = get_object_vars( $report );
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_coupons_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$data_values = array(
+			'amount'        => array(
+				'description' => __( 'Net discount amount.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'coupons_count' => array(
+				'description' => __( 'Number of coupons.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'orders_count'  => array(
+				'title'       => __( 'Discounted orders', 'woocommerce' ),
+				'description' => __( 'Number of discounted orders.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+			),
+		);
+
+		$segments = array(
+			'segments' => array(
+				'description' => __( 'Reports data grouped by segment condition.', 'woocommerce' ),
+				'type'        => 'array',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'items'       => array(
+					'type'       => 'object',
+					'properties' => array(
+						'segment_id' => array(
+							'description' => __( 'Segment identificator.', 'woocommerce' ),
+							'type'        => 'integer',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+						),
+						'subtotals'  => array(
+							'description' => __( 'Interval subtotals.', 'woocommerce' ),
+							'type'        => 'object',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'properties'  => $data_values,
+						),
+					),
+				),
+			),
+		);
+
+		$totals = array_merge( $data_values, $segments );
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_coupons_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals'    => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+				'intervals' => array(
+					'description' => __( 'Reports data grouped by intervals.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'object',
+						'properties' => array(
+							'interval'       => array(
+								'description' => __( 'Type of interval.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'enum'        => array( 'day', 'week', 'month', 'year' ),
+							),
+							'date_start'     => array(
+								'description' => __( "The date the report start, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_start_gmt' => array(
+								'description' => __( 'The date the report start, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end'       => array(
+								'description' => __( "The date the report end, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end_gmt'   => array(
+								'description' => __( 'The date the report end, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'subtotals'      => array(
+								'description' => __( 'Interval subtotals.', 'woocommerce' ),
+								'type'        => 'object',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'properties'  => $totals,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params              = array();
+		$params['context']   = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']      = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']  = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']     = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']    = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']     = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']   = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'amount',
+				'coupons_count',
+				'orders_count',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']  = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['coupons']   = array(
+			'description'       => __( 'Limit result set to coupons assigned specific coupon IDs.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['segmentby'] = array(
+			'description'       => __( 'Segment the response by additional constraint.', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'product',
+				'variation',
+				'category',
+				'coupon',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['fields']    = array(
+			'description'       => __( 'Limit stats fields to the specified items.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Coupons/Stats/DataStore.php

@@ -0,0 +1,249 @@
+<?php
+/**
+ * API\Reports\Coupons\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Coupons\Stats;
+
+defined( 'ABSPATH' ) || exit;
+use \Automattic\WooCommerce\Admin\API\Reports\Coupons\DataStore as CouponsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Coupons\Stats\DataStore.
+ */
+class DataStore extends CouponsDataStore implements DataStoreInterface {
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'date_start'     => 'strval',
+		'date_end'       => 'strval',
+		'date_start_gmt' => 'strval',
+		'date_end_gmt'   => 'strval',
+		'amount'         => 'floatval',
+		'coupons_count'  => 'intval',
+		'orders_count'   => 'intval',
+	);
+
+	/**
+	 * SQL columns to select in the db query.
+	 *
+	 * @var array
+	 */
+	protected $report_columns;
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'coupons_stats';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'coupons_stats';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'amount'        => 'SUM(discount_amount) as amount',
+			'coupons_count' => 'COUNT(DISTINCT coupon_id) as coupons_count',
+			'orders_count'  => "COUNT(DISTINCT {$table_name}.order_id) as orders_count",
+		);
+	}
+
+	/**
+	 * Updates the database query with parameters used for Products Stats report: categories and order status.
+	 *
+	 * @param array $query_args       Query arguments supplied by the user.
+	 */
+	protected function update_sql_query_params( $query_args ) {
+		global $wpdb;
+
+		$clauses = array(
+			'where' => '',
+			'join'  => '',
+		);
+
+		$order_coupon_lookup_table = self::get_db_table_name();
+
+		$included_coupons = $this->get_included_coupons( $query_args, 'coupons' );
+		if ( $included_coupons ) {
+			$clauses['where'] .= " AND {$order_coupon_lookup_table}.coupon_id IN ({$included_coupons})";
+		}
+
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		if ( $order_status_filter ) {
+			$clauses['join']  .= " JOIN {$wpdb->prefix}wc_order_stats ON {$order_coupon_lookup_table}.order_id = {$wpdb->prefix}wc_order_stats.order_id";
+			$clauses['where'] .= " AND ( {$order_status_filter} )";
+		}
+
+		$this->add_time_period_sql_params( $query_args, $order_coupon_lookup_table );
+		$this->add_intervals_sql_params( $query_args, $order_coupon_lookup_table );
+		$clauses['where_time'] = $this->get_sql_clause( 'where_time' );
+
+		$this->interval_query->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+		$this->interval_query->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+		$this->interval_query->add_sql_clause( 'select', $this->get_sql_clause( 'select' ) );
+		$this->interval_query->add_sql_clause( 'select', 'AS time_interval' );
+
+		foreach ( array( 'join', 'where_time', 'where' ) as $clause ) {
+			$this->interval_query->add_sql_clause( $clause, $clauses[ $clause ] );
+			$this->total_query->add_sql_clause( $clause, $clauses[ $clause ] );
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @since 3.5.0
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page' => get_option( 'posts_per_page' ),
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'date',
+			'before'   => TimeInterval::default_before(),
+			'after'    => TimeInterval::default_after(),
+			'fields'   => '*',
+			'interval' => 'week',
+			'coupons'  => array(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$selections      = $this->selected_columns( $query_args );
+			$totals_query    = array();
+			$intervals_query = array();
+			$limit_params    = $this->get_limit_sql_params( $query_args );
+			$this->update_sql_query_params( $query_args, $totals_query, $intervals_query );
+
+			$db_intervals = $wpdb->get_col(
+				$this->interval_query->get_query_statement()
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			$db_interval_count       = count( $db_intervals );
+			$expected_interval_count = TimeInterval::intervals_between( $query_args['after'], $query_args['before'], $query_args['interval'] );
+			$total_pages             = (int) ceil( $expected_interval_count / $limit_params['per_page'] );
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return $data;
+			}
+
+			$this->total_query->add_sql_clause( 'select', $selections );
+			$totals = $wpdb->get_results(
+				$this->total_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $totals ) {
+				return $data;
+			}
+
+			// @todo remove these assignements when refactoring segmenter classes to use query objects.
+			$totals_query          = array(
+				'from_clause'       => $this->total_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->total_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->total_query->get_sql_clause( 'where' ),
+			);
+			$intervals_query       = array(
+				'select_clause'     => $this->get_sql_clause( 'select' ),
+				'from_clause'       => $this->interval_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->interval_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->interval_query->get_sql_clause( 'where' ),
+				'limit'             => $this->get_sql_clause( 'limit' ),
+			);
+			$segmenter             = new Segmenter( $query_args, $this->report_columns );
+			$totals[0]['segments'] = $segmenter->get_totals_segments( $totals_query, $table_name );
+			$totals                = (object) $this->cast_numbers( $totals[0] );
+
+			// Intervals.
+			$this->update_intervals_sql_params( $query_args, $db_interval_count, $expected_interval_count, $table_name );
+			$this->interval_query->add_sql_clause( 'select', ", MAX({$table_name}.date_created) AS datetime_anchor" );
+
+			if ( '' !== $selections ) {
+				$this->interval_query->add_sql_clause( 'select', ', ' . $selections );
+			}
+
+			$intervals = $wpdb->get_results(
+				$this->interval_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $intervals ) {
+				return $data;
+			}
+
+			$data = (object) array(
+				'totals'    => $totals,
+				'intervals' => $intervals,
+				'total'     => $expected_interval_count,
+				'pages'     => $total_pages,
+				'page_no'   => (int) $query_args['page'],
+			);
+
+			if ( TimeInterval::intervals_missing( $expected_interval_count, $db_interval_count, $limit_params['per_page'], $query_args['page'], $query_args['order'], $query_args['orderby'], count( $intervals ) ) ) {
+				$this->fill_in_missing_intervals( $db_intervals, $query_args['adj_after'], $query_args['adj_before'], $query_args['interval'], $data );
+				$this->sort_intervals( $data, $query_args['orderby'], $query_args['order'] );
+				$this->remove_extra_records( $data, $query_args['page'], $limit_params['per_page'], $db_interval_count, $expected_interval_count, $query_args['orderby'], $query_args['order'] );
+			} else {
+				$this->update_interval_boundary_dates( $query_args['after'], $query_args['before'], $query_args['interval'], $data->intervals );
+			}
+			$segmenter->add_intervals_segments( $data, $intervals_query, $table_name );
+			$this->create_interval_subtotals( $data->intervals );
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		unset( $this->subquery );
+		$this->total_query = new SqlQuery( $this->context . '_total' );
+		$this->total_query->add_sql_clause( 'from', self::get_db_table_name() );
+
+		$this->interval_query = new SqlQuery( $this->context . '_interval' );
+		$this->interval_query->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->interval_query->add_sql_clause( 'group_by', 'time_interval' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Coupons/Stats/Query.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Class for parameter-based Products Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'  => '2018-07-19 00:00:00',
+ *          'after'   => '2018-07-05 00:00:00',
+ *          'page'    => 2,
+ *          'coupons' => array(5, 120),
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Coupons\Stats\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Coupons\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Coupons\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Products report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_coupons_stats_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-coupons-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_coupons_select_query', $results, $args );
+	}
+
+}

packages/woocommerce-admin/src/API/Reports/Coupons/Stats/Segmenter.php

@@ -0,0 +1,330 @@
+<?php
+/**
+ * Class for adding segmenting support to coupons/stats without cluttering the data store.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Coupons\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Segmenter as ReportsSegmenter;
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * Date & time interval and numeric range handling class for Reporting API.
+ */
+class Segmenter extends ReportsSegmenter {
+
+	/**
+	 * Returns column => query mapping to be used for product-related product-level segmenting query
+	 * (e.g. coupon discount amount for product X when segmenting by product id or category).
+	 *
+	 * @param string $products_table Name of SQL table containing the product-level segmenting info.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function get_segment_selections_product_level( $products_table ) {
+		$columns_mapping = array(
+			'amount' => "SUM($products_table.coupon_amount) as amount",
+		);
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Returns column => query mapping to be used for order-related product-level segmenting query
+	 * (e.g. orders_count when segmented by category).
+	 *
+	 * @param string $coupons_lookup_table Name of SQL table containing the order-level segmenting info.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function get_segment_selections_order_level( $coupons_lookup_table ) {
+		$columns_mapping = array(
+			'coupons_count' => "COUNT(DISTINCT $coupons_lookup_table.coupon_id) as coupons_count",
+			'orders_count'  => "COUNT(DISTINCT $coupons_lookup_table.order_id) as orders_count",
+		);
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Returns column => query mapping to be used for order-level segmenting query
+	 * (e.g. discount amount when segmented by coupons).
+	 *
+	 * @param string $coupons_lookup_table Name of SQL table containing the order-level info.
+	 * @param array  $overrides Array of overrides for default column calculations.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function segment_selections_orders( $coupons_lookup_table, $overrides = array() ) {
+		$columns_mapping = array(
+			'amount'        => "SUM($coupons_lookup_table.discount_amount) as amount",
+			'coupons_count' => "COUNT(DISTINCT $coupons_lookup_table.coupon_id) as coupons_count",
+			'orders_count'  => "COUNT(DISTINCT $coupons_lookup_table.order_id) as orders_count",
+		);
+
+		if ( $overrides ) {
+			$columns_mapping = array_merge( $columns_mapping, $overrides );
+		}
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Calculate segments for totals where the segmenting property is bound to product (e.g. category, product_id, variation_id).
+	 *
+	 * @param array  $segmenting_selections SELECT part of segmenting SQL query--one for 'product_level' and one for 'order_level'.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $segmenting_dimension_name Name of the segmenting dimension.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $totals_query Array of SQL clauses for totals query.
+	 * @param string $unique_orders_table Name of temporary SQL table that holds unique orders.
+	 *
+	 * @return array
+	 */
+	protected function get_product_related_totals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $totals_query, $unique_orders_table ) {
+		global $wpdb;
+
+		// Product-level numbers and order-level numbers can be fetched by the same query.
+		$segments_products = $wpdb->get_results(
+			"SELECT
+						$segmenting_groupby AS $segmenting_dimension_name
+						{$segmenting_selections['product_level']}
+						{$segmenting_selections['order_level']}
+					FROM
+						$table_name
+						$segmenting_from
+						{$totals_query['from_clause']}
+					WHERE
+						1=1
+						{$totals_query['where_time_clause']}
+						{$totals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						$segmenting_groupby",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		$totals_segments = $this->merge_segment_totals_results( $segmenting_dimension_name, $segments_products, array() );
+		return $totals_segments;
+	}
+
+	/**
+	 * Calculate segments for intervals where the segmenting property is bound to product (e.g. category, product_id, variation_id).
+	 *
+	 * @param array  $segmenting_selections SELECT part of segmenting SQL query--one for 'product_level' and one for 'order_level'.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $segmenting_dimension_name Name of the segmenting dimension.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $intervals_query Array of SQL clauses for intervals query.
+	 * @param string $unique_orders_table Name of temporary SQL table that holds unique orders.
+	 *
+	 * @return array
+	 */
+	protected function get_product_related_intervals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $intervals_query, $unique_orders_table ) {
+		global $wpdb;
+
+		// LIMIT offset, rowcount needs to be updated to LIMIT offset, rowcount * max number of segments.
+		$limit_parts      = explode( ',', $intervals_query['limit'] );
+		$orig_rowcount    = intval( $limit_parts[1] );
+		$segmenting_limit = $limit_parts[0] . ',' . $orig_rowcount * count( $this->get_all_segments() );
+
+		// Product-level numbers and order-level numbers can be fetched by the same query.
+		$segments_products = $wpdb->get_results(
+			"SELECT
+						{$intervals_query['select_clause']} AS time_interval,
+						$segmenting_groupby AS $segmenting_dimension_name
+						{$segmenting_selections['product_level']}
+						{$segmenting_selections['order_level']}
+					FROM
+						$table_name
+						$segmenting_from
+						{$intervals_query['from_clause']}
+					WHERE
+						1=1
+						{$intervals_query['where_time_clause']}
+						{$intervals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						time_interval, $segmenting_groupby
+					$segmenting_limit",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		$intervals_segments = $this->merge_segment_intervals_results( $segmenting_dimension_name, $segments_products, array() );
+		return $intervals_segments;
+	}
+
+	/**
+	 * Calculate segments for totals query where the segmenting property is bound to order (e.g. coupon or customer type).
+	 *
+	 * @param string $segmenting_select SELECT part of segmenting SQL query.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $totals_query Array of SQL clauses for intervals query.
+	 *
+	 * @return array
+	 */
+	protected function get_order_related_totals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $totals_query ) {
+		global $wpdb;
+
+		$totals_segments = $wpdb->get_results(
+			"SELECT
+						$segmenting_groupby
+						$segmenting_select
+					FROM
+						$table_name
+						$segmenting_from
+						{$totals_query['from_clause']}
+					WHERE
+						1=1
+						{$totals_query['where_time_clause']}
+						{$totals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						$segmenting_groupby",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		// Reformat result.
+		$totals_segments = $this->reformat_totals_segments( $totals_segments, $segmenting_groupby );
+		return $totals_segments;
+	}
+
+	/**
+	 * Calculate segments for intervals query where the segmenting property is bound to order (e.g. coupon or customer type).
+	 *
+	 * @param string $segmenting_select SELECT part of segmenting SQL query.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $intervals_query Array of SQL clauses for intervals query.
+	 *
+	 * @return array
+	 */
+	protected function get_order_related_intervals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $intervals_query ) {
+		global $wpdb;
+		$limit_parts      = explode( ',', $intervals_query['limit'] );
+		$orig_rowcount    = intval( $limit_parts[1] );
+		$segmenting_limit = $limit_parts[0] . ',' . $orig_rowcount * count( $this->get_all_segments() );
+
+		$intervals_segments = $wpdb->get_results(
+			"SELECT
+						MAX($table_name.date_created) AS datetime_anchor,
+						{$intervals_query['select_clause']} AS time_interval,
+						$segmenting_groupby
+						$segmenting_select
+					FROM
+						$table_name
+						$segmenting_from
+						{$intervals_query['from_clause']}
+					WHERE
+						1=1
+						{$intervals_query['where_time_clause']}
+						{$intervals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						time_interval, $segmenting_groupby
+					$segmenting_limit",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		// Reformat result.
+		$intervals_segments = $this->reformat_intervals_segments( $intervals_segments, $segmenting_groupby );
+		return $intervals_segments;
+	}
+
+	/**
+	 * Return array of segments formatted for REST response.
+	 *
+	 * @param string $type Type of segments to return--'totals' or 'intervals'.
+	 * @param array  $query_params SQL query parameter array.
+	 * @param string $table_name Name of main SQL table for the data store (used as basis for JOINS).
+	 *
+	 * @return array
+	 * @throws \Automattic\WooCommerce\Admin\API\Reports\ParameterException In case of segmenting by variations, when no parent product is specified.
+	 */
+	protected function get_segments( $type, $query_params, $table_name ) {
+		global $wpdb;
+		if ( ! isset( $this->query_args['segmentby'] ) || '' === $this->query_args['segmentby'] ) {
+			return array();
+		}
+
+		$product_segmenting_table = $wpdb->prefix . 'wc_order_product_lookup';
+		$unique_orders_table      = '';
+		$segmenting_where         = '';
+
+		// Product, variation, and category are bound to product, so here product segmenting table is required,
+		// while coupon and customer are bound to order, so we don't need the extra JOIN for those.
+		// This also means that segment selections need to be calculated differently.
+		if ( 'product' === $this->query_args['segmentby'] ) {
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$order_level_columns       = $this->get_segment_selections_order_level( $table_name );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+				'order_level'   => $this->prepare_selections( $order_level_columns ),
+			);
+			$this->report_columns      = array_merge( $product_level_columns, $order_level_columns );
+			$segmenting_from           = "INNER JOIN $product_segmenting_table ON ($table_name.order_id = $product_segmenting_table.order_id)";
+			$segmenting_groupby        = $product_segmenting_table . '.product_id';
+			$segmenting_dimension_name = 'product_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'variation' === $this->query_args['segmentby'] ) {
+			if ( ! isset( $this->query_args['product_includes'] ) || count( $this->query_args['product_includes'] ) !== 1 ) {
+				throw new ParameterException( 'wc_admin_reports_invalid_segmenting_variation', __( 'product_includes parameter need to specify exactly one product when segmenting by variation.', 'woocommerce' ) );
+			}
+
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$order_level_columns       = $this->get_segment_selections_order_level( $table_name );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+				'order_level'   => $this->prepare_selections( $order_level_columns ),
+			);
+			$this->report_columns      = array_merge( $product_level_columns, $order_level_columns );
+			$segmenting_from           = "INNER JOIN $product_segmenting_table ON ($table_name.order_id = $product_segmenting_table.order_id)";
+			$segmenting_where          = "AND $product_segmenting_table.product_id = {$this->query_args['product_includes'][0]}";
+			$segmenting_groupby        = $product_segmenting_table . '.variation_id';
+			$segmenting_dimension_name = 'variation_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'category' === $this->query_args['segmentby'] ) {
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$order_level_columns       = $this->get_segment_selections_order_level( $table_name );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+				'order_level'   => $this->prepare_selections( $order_level_columns ),
+			);
+			$this->report_columns      = array_merge( $product_level_columns, $order_level_columns );
+			$segmenting_from           = "
+			INNER JOIN $product_segmenting_table ON ($table_name.order_id = $product_segmenting_table.order_id)
+			LEFT JOIN {$wpdb->term_relationships} ON {$product_segmenting_table}.product_id = {$wpdb->term_relationships}.object_id
+			JOIN {$wpdb->term_taxonomy} ON {$wpdb->term_taxonomy}.term_taxonomy_id = {$wpdb->term_relationships}.term_taxonomy_id
+			LEFT JOIN {$wpdb->wc_category_lookup} ON {$wpdb->term_taxonomy}.term_id = {$wpdb->wc_category_lookup}.category_id
+			";
+			$segmenting_where          = " AND {$wpdb->wc_category_lookup}.category_tree_id IS NOT NULL";
+			$segmenting_groupby        = "{$wpdb->wc_category_lookup}.category_tree_id";
+			$segmenting_dimension_name = 'category_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'coupon' === $this->query_args['segmentby'] ) {
+			$coupon_level_columns  = $this->segment_selections_orders( $table_name );
+			$segmenting_selections = $this->prepare_selections( $coupon_level_columns );
+			$this->report_columns  = $coupon_level_columns;
+			$segmenting_from       = '';
+			$segmenting_groupby    = "$table_name.coupon_id";
+
+			$segments = $this->get_order_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $query_params );
+		}
+
+		return $segments;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Customers/Controller.php

@@ -0,0 +1,640 @@
+<?php
+/**
+ * REST API Reports customers controller
+ *
+ * Handles requests to the /reports/customers endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Customers;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableTraits;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+
+/**
+ * REST API Reports customers controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller implements ExportableInterface {
+	/**
+	 * Exportable traits.
+	 */
+	use ExportableTraits;
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/customers';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                        = array();
+		$args['registered_before']   = $request['registered_before'];
+		$args['registered_after']    = $request['registered_after'];
+		$args['order_before']        = $request['before'];
+		$args['order_after']         = $request['after'];
+		$args['page']                = $request['page'];
+		$args['per_page']            = $request['per_page'];
+		$args['order']               = $request['order'];
+		$args['orderby']             = $request['orderby'];
+		$args['match']               = $request['match'];
+		$args['search']              = $request['search'];
+		$args['searchby']            = $request['searchby'];
+		$args['name_includes']       = $request['name_includes'];
+		$args['name_excludes']       = $request['name_excludes'];
+		$args['username_includes']   = $request['username_includes'];
+		$args['username_excludes']   = $request['username_excludes'];
+		$args['email_includes']      = $request['email_includes'];
+		$args['email_excludes']      = $request['email_excludes'];
+		$args['country_includes']    = $request['country_includes'];
+		$args['country_excludes']    = $request['country_excludes'];
+		$args['last_active_before']  = $request['last_active_before'];
+		$args['last_active_after']   = $request['last_active_after'];
+		$args['orders_count_min']    = $request['orders_count_min'];
+		$args['orders_count_max']    = $request['orders_count_max'];
+		$args['total_spend_min']     = $request['total_spend_min'];
+		$args['total_spend_max']     = $request['total_spend_max'];
+		$args['avg_order_value_min'] = $request['avg_order_value_min'];
+		$args['avg_order_value_max'] = $request['avg_order_value_max'];
+		$args['last_order_before']   = $request['last_order_before'];
+		$args['last_order_after']    = $request['last_order_after'];
+		$args['customers']           = $request['customers'];
+
+		$between_params_numeric    = array( 'orders_count', 'total_spend', 'avg_order_value' );
+		$normalized_params_numeric = TimeInterval::normalize_between_params( $request, $between_params_numeric, false );
+		$between_params_date       = array( 'last_active', 'registered' );
+		$normalized_params_date    = TimeInterval::normalize_between_params( $request, $between_params_date, true );
+		$args                      = array_merge( $args, $normalized_params_numeric, $normalized_params_date );
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args      = $this->prepare_reports_query( $request );
+		$customers_query = new Query( $query_args );
+		$report_data     = $customers_query->get_data();
+
+		$data = array();
+
+		foreach ( $report_data->data as $customer_data ) {
+			$item   = $this->prepare_item_for_response( $customer_data, $request );
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+
+	/**
+	 * Get one report.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_item( $request ) {
+		$query_args              = $this->prepare_reports_query( $request );
+		$query_args['customers'] = array( $request->get_param( 'id' ) );
+		$customers_query         = new Query( $query_args );
+		$report_data             = $customers_query->get_data();
+
+		$data = array();
+
+		foreach ( $report_data->data as $customer_data ) {
+			$item   = $this->prepare_item_for_response( $customer_data, $request );
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $report, $request );
+		// Registered date is UTC.
+		$data['date_registered_gmt'] = wc_rest_prepare_date_response( $data['date_registered'] );
+		$data['date_registered']     = wc_rest_prepare_date_response( $data['date_registered'], false );
+		// Last active date is local time.
+		$data['date_last_active_gmt'] = wc_rest_prepare_date_response( $data['date_last_active'], false );
+		$data['date_last_active']     = wc_rest_prepare_date_response( $data['date_last_active'] );
+		$data                         = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $report ) );
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_customers', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param array $object Object data.
+	 * @return array
+	 */
+	protected function prepare_links( $object ) {
+		if ( empty( $object['user_id'] ) ) {
+			return array();
+		}
+
+		return array(
+			'customer'   => array(
+				'href' => rest_url( sprintf( '/%s/customers/%d', $this->namespace, $object['id'] ) ),
+			),
+			'collection' => array(
+				'href' => rest_url( sprintf( '/%s/customers', $this->namespace ) ),
+			),
+		);
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_customers',
+			'type'       => 'object',
+			'properties' => array(
+				'id'                   => array(
+					'description' => __( 'Customer ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'user_id'              => array(
+					'description' => __( 'User ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'name'                 => array(
+					'description' => __( 'Name.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'username'             => array(
+					'description' => __( 'Username.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'country'              => array(
+					'description' => __( 'Country / Region.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'city'                 => array(
+					'description' => __( 'City.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'state'                => array(
+					'description' => __( 'Region.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'postcode'             => array(
+					'description' => __( 'Postal code.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_registered'      => array(
+					'description' => __( 'Date registered.', 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_registered_gmt'  => array(
+					'description' => __( 'Date registered GMT.', 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_last_active'     => array(
+					'description' => __( 'Date last active.', 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_last_active_gmt' => array(
+					'description' => __( 'Date last active GMT.', 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'orders_count'         => array(
+					'description' => __( 'Order count.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'total_spend'          => array(
+					'description' => __( 'Total spend.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'avg_order_value'      => array(
+					'description' => __( 'Avg order value.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                            = array();
+		$params['context']                 = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['registered_before']       = array(
+			'description'       => __( 'Limit response to objects registered before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['registered_after']        = array(
+			'description'       => __( 'Limit response to objects registered after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']                   = array(
+			'description'       => __( 'Limit response to resources with orders published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']                  = array(
+			'description'       => __( 'Limit response to resources with orders published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['page']                    = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']                = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']                   = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']                 = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date_registered',
+			'enum'              => array(
+				'username',
+				'name',
+				'country',
+				'city',
+				'state',
+				'postcode',
+				'date_registered',
+				'date_last_active',
+				'orders_count',
+				'total_spend',
+				'avg_order_value',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['match']                   = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: status_is, status_is_not, product_includes, product_excludes, coupon_includes, coupon_excludes, customer, categories', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['search']                  = array(
+			'description'       => __( 'Limit response to objects with a customer field containing the search term. Searches the field provided by `searchby`.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['searchby']                = array(
+			'description' => 'Limit results with `search` and `searchby` to specific fields containing the search term.',
+			'type'        => 'string',
+			'default'     => 'name',
+			'enum'        => array(
+				'name',
+				'username',
+				'email',
+			),
+		);
+		$params['name_includes']           = array(
+			'description'       => __( 'Limit response to objects with specfic names.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['name_excludes']           = array(
+			'description'       => __( 'Limit response to objects excluding specfic names.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['username_includes']       = array(
+			'description'       => __( 'Limit response to objects with specfic usernames.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['username_excludes']       = array(
+			'description'       => __( 'Limit response to objects excluding specfic usernames.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['email_includes']          = array(
+			'description'       => __( 'Limit response to objects including emails.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['email_excludes']          = array(
+			'description'       => __( 'Limit response to objects excluding emails.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['country_includes']        = array(
+			'description'       => __( 'Limit response to objects with specfic countries.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['country_excludes']        = array(
+			'description'       => __( 'Limit response to objects excluding specfic countries.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_active_before']      = array(
+			'description'       => __( 'Limit response to objects last active before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_active_after']       = array(
+			'description'       => __( 'Limit response to objects last active after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_active_between']     = array(
+			'description'       => __( 'Limit response to objects last active between two given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_date_arg' ),
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+		$params['registered_before']       = array(
+			'description'       => __( 'Limit response to objects registered before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['registered_after']        = array(
+			'description'       => __( 'Limit response to objects registered after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['registered_between']      = array(
+			'description'       => __( 'Limit response to objects last active between two given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_date_arg' ),
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+		$params['orders_count_min']        = array(
+			'description'       => __( 'Limit response to objects with an order count greater than or equal to given integer.', 'woocommerce' ),
+			'type'              => 'integer',
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orders_count_max']        = array(
+			'description'       => __( 'Limit response to objects with an order count less than or equal to given integer.', 'woocommerce' ),
+			'type'              => 'integer',
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orders_count_between']    = array(
+			'description'       => __( 'Limit response to objects with an order count between two given integers.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_numeric_arg' ),
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['total_spend_min']         = array(
+			'description'       => __( 'Limit response to objects with a total order spend greater than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['total_spend_max']         = array(
+			'description'       => __( 'Limit response to objects with a total order spend less than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['total_spend_between']     = array(
+			'description'       => __( 'Limit response to objects with a total order spend between two given numbers.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_numeric_arg' ),
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['avg_order_value_min']     = array(
+			'description'       => __( 'Limit response to objects with an average order spend greater than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['avg_order_value_max']     = array(
+			'description'       => __( 'Limit response to objects with an average order spend less than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['avg_order_value_between'] = array(
+			'description'       => __( 'Limit response to objects with an average order spend between two given numbers.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_numeric_arg' ),
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['last_order_before']       = array(
+			'description'       => __( 'Limit response to objects with last order before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_order_after']        = array(
+			'description'       => __( 'Limit response to objects with last order after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['customers']               = array(
+			'description'       => __( 'Limit result to items with specified customer ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'name'            => __( 'Name', 'woocommerce' ),
+			'username'        => __( 'Username', 'woocommerce' ),
+			'last_active'     => __( 'Last Active', 'woocommerce' ),
+			'registered'      => __( 'Sign Up', 'woocommerce' ),
+			'email'           => __( 'Email', 'woocommerce' ),
+			'orders_count'    => __( 'Orders', 'woocommerce' ),
+			'total_spend'     => __( 'Total Spend', 'woocommerce' ),
+			'avg_order_value' => __( 'AOV', 'woocommerce' ),
+			'country'         => __( 'Country / Region', 'woocommerce' ),
+			'city'            => __( 'City', 'woocommerce' ),
+			'region'          => __( 'Region', 'woocommerce' ),
+			'postcode'        => __( 'Postal Code', 'woocommerce' ),
+		);
+
+		/**
+		 * Filter to add or remove column names from the customers report for
+		 * export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_customers_export_columns',
+			$export_columns
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$export_item = array(
+			'name'            => $item['name'],
+			'username'        => $item['username'],
+			'last_active'     => $item['date_last_active'],
+			'registered'      => $item['date_registered'],
+			'email'           => $item['email'],
+			'orders_count'    => $item['orders_count'],
+			'total_spend'     => self::csv_number_format( $item['total_spend'] ),
+			'avg_order_value' => self::csv_number_format( $item['avg_order_value'] ),
+			'country'         => $item['country'],
+			'city'            => $item['city'],
+			'region'          => $item['state'],
+			'postcode'        => $item['postcode'],
+		);
+
+		return apply_filters(
+			'woocommerce_report_customers_prepare_export_item',
+			$export_item,
+			$item
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Customers/DataStore.php

@@ -0,0 +1,839 @@
+<?php
+/**
+ * Admin\API\Reports\Customers\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Customers;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+use \Automattic\WooCommerce\Admin\API\Reports\Cache as ReportsCache;
+
+/**
+ * Admin\API\Reports\Customers\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_customer_lookup';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'customers';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'id'              => 'intval',
+		'user_id'         => 'intval',
+		'orders_count'    => 'intval',
+		'total_spend'     => 'floatval',
+		'avg_order_value' => 'floatval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'customers';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		global $wpdb;
+		$table_name           = self::get_db_table_name();
+		$orders_count         = 'SUM( CASE WHEN parent_id = 0 THEN 1 ELSE 0 END )';
+		$total_spend          = 'SUM( total_sales )';
+		$this->report_columns = array(
+			'id'               => "{$table_name}.customer_id as id",
+			'user_id'          => 'user_id',
+			'username'         => 'username',
+			'name'             => "CONCAT_WS( ' ', first_name, last_name ) as name", // @todo What does this mean for RTL?
+			'email'            => 'email',
+			'country'          => 'country',
+			'city'             => 'city',
+			'state'            => 'state',
+			'postcode'         => 'postcode',
+			'date_registered'  => 'date_registered',
+			'date_last_active' => 'IF( date_last_active <= "0000-00-00 00:00:00", NULL, date_last_active ) AS date_last_active',
+			'date_last_order'  => "MAX( {$wpdb->prefix}wc_order_stats.date_created ) as date_last_order",
+			'orders_count'     => "{$orders_count} as orders_count",
+			'total_spend'      => "{$total_spend} as total_spend",
+			'avg_order_value'  => "CASE WHEN {$orders_count} = 0 THEN NULL ELSE {$total_spend} / {$orders_count} END AS avg_order_value",
+		);
+	}
+
+	/**
+	 * Set up all the hooks for maintaining and populating table data.
+	 */
+	public static function init() {
+		add_action( 'edit_user_profile_update', array( __CLASS__, 'update_registered_customer' ) );
+		add_action( 'woocommerce_analytics_delete_order_stats', array( __CLASS__, 'sync_on_order_delete' ), 15, 2 );
+	}
+
+	/**
+	 * Sync customers data after an order was deleted.
+	 *
+	 * When an order is deleted, the customer record is deleted from the
+	 * table if the customer has no other orders.
+	 *
+	 * @param int $order_id Order ID.
+	 * @param int $customer_id Customer ID.
+	 */
+	public static function sync_on_order_delete( $order_id, $customer_id ) {
+		$customer_id = absint( $customer_id );
+
+		if ( 0 === $customer_id ) {
+			return;
+		}
+
+		// Calculate the amount of orders remaining for this customer.
+		$order_count = self::get_order_count( $customer_id );
+
+		if ( 0 === $order_count ) {
+			self::delete_customer( $customer_id );
+		}
+	}
+
+	/**
+	 * Sync customers data after an order was updated.
+	 *
+	 * Only updates customer if it is the customers last order.
+	 *
+	 * @param int $post_id of order.
+	 * @return true|-1
+	 */
+	public static function sync_order_customer( $post_id ) {
+		global $wpdb;
+
+		if ( 'shop_order' !== get_post_type( $post_id ) && 'shop_order_refund' !== get_post_type( $post_id ) ) {
+			return -1;
+		}
+
+		$order       = wc_get_order( $post_id );
+		$customer_id = self::get_existing_customer_id_from_order( $order );
+		if ( false === $customer_id ) {
+			return -1;
+		}
+		$last_order = self::get_last_order( $customer_id );
+
+		if ( ! $last_order || $order->get_id() !== $last_order->get_id() ) {
+			return -1;
+		}
+
+		list($data, $format) = self::get_customer_order_data_and_format( $order );
+
+		$result = $wpdb->update( self::get_db_table_name(), $data, array( 'customer_id' => $customer_id ), $format );
+
+		/**
+		 * Fires when a customer is updated.
+		 *
+		 * @param int $customer_id Customer ID.
+		 */
+		do_action( 'woocommerce_analytics_update_customer', $customer_id );
+
+		return 1 === $result;
+	}
+
+	/**
+	 * Maps ordering specified by the user to columns in the database/fields in the data.
+	 *
+	 * @param string $order_by Sorting criterion.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'name' === $order_by ) {
+			return "CONCAT_WS( ' ', first_name, last_name )";
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Fills WHERE clause of SQL request with date-related constraints.
+	 *
+	 * @param array  $query_args Parameters supplied by the user.
+	 * @param string $table_name Name of the db table relevant for the date constraint.
+	 */
+	protected function add_time_period_sql_params( $query_args, $table_name ) {
+		global $wpdb;
+
+		$this->clear_sql_clause( array( 'where', 'where_time', 'having' ) );
+		$date_param_mapping  = array(
+			'registered'  => array(
+				'clause' => 'where',
+				'column' => $table_name . '.date_registered',
+			),
+			'order'       => array(
+				'clause' => 'where',
+				'column' => $wpdb->prefix . 'wc_order_stats.date_created',
+			),
+			'last_active' => array(
+				'clause' => 'where',
+				'column' => $table_name . '.date_last_active',
+			),
+			'last_order'  => array(
+				'clause' => 'having',
+				'column' => "MAX( {$wpdb->prefix}wc_order_stats.date_created )",
+			),
+		);
+		$match_operator      = $this->get_match_operator( $query_args );
+		$where_time_clauses  = array();
+		$having_time_clauses = array();
+
+		foreach ( $date_param_mapping as $query_param => $param_info ) {
+			$subclauses  = array();
+			$before_arg  = $query_param . '_before';
+			$after_arg   = $query_param . '_after';
+			$column_name = $param_info['column'];
+
+			if ( ! empty( $query_args[ $before_arg ] ) ) {
+				$datetime     = new \DateTime( $query_args[ $before_arg ] );
+				$datetime_str = $datetime->format( TimeInterval::$sql_datetime_format );
+				$subclauses[] = "{$column_name} <= '$datetime_str'";
+			}
+
+			if ( ! empty( $query_args[ $after_arg ] ) ) {
+				$datetime     = new \DateTime( $query_args[ $after_arg ] );
+				$datetime_str = $datetime->format( TimeInterval::$sql_datetime_format );
+				$subclauses[] = "{$column_name} >= '$datetime_str'";
+			}
+
+			if ( $subclauses && ( 'where' === $param_info['clause'] ) ) {
+				$where_time_clauses[] = '(' . implode( ' AND ', $subclauses ) . ')';
+			}
+
+			if ( $subclauses && ( 'having' === $param_info['clause'] ) ) {
+				$having_time_clauses[] = '(' . implode( ' AND ', $subclauses ) . ')';
+			}
+		}
+
+		if ( $where_time_clauses ) {
+			$this->subquery->add_sql_clause( 'where_time', 'AND ' . implode( " {$match_operator} ", $where_time_clauses ) );
+		}
+
+		if ( $having_time_clauses ) {
+			$this->subquery->add_sql_clause( 'having', 'AND ' . implode( " {$match_operator} ", $having_time_clauses ) );
+		}
+	}
+
+	/**
+	 * Updates the database query with parameters used for Customers report: categories and order status.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+		$customer_lookup_table  = self::get_db_table_name();
+		$order_stats_table_name = $wpdb->prefix . 'wc_order_stats';
+
+		$this->add_time_period_sql_params( $query_args, $customer_lookup_table );
+		$this->get_limit_sql_params( $query_args );
+		$this->add_order_by_sql_params( $query_args );
+		$this->subquery->add_sql_clause( 'left_join', "LEFT JOIN {$order_stats_table_name} ON {$customer_lookup_table}.customer_id = {$order_stats_table_name}.customer_id" );
+
+		$match_operator = $this->get_match_operator( $query_args );
+		$where_clauses  = array();
+		$having_clauses = array();
+
+		$exact_match_params = array(
+			'name',
+			'username',
+			'email',
+			'country',
+		);
+
+		foreach ( $exact_match_params as $exact_match_param ) {
+			if ( ! empty( $query_args[ $exact_match_param . '_includes' ] ) ) {
+				$exact_match_arguments         = $query_args[ $exact_match_param . '_includes' ];
+				$exact_match_arguments_escaped = array_map( 'esc_sql', explode( ',', $exact_match_arguments ) );
+				$included                      = implode( "','", $exact_match_arguments_escaped );
+				// 'country_includes' is a list of country codes, the others will be a list of customer ids.
+				$table_column    = 'country' === $exact_match_param ? $exact_match_param : 'customer_id';
+				$where_clauses[] = "{$customer_lookup_table}.{$table_column} IN ('{$included}')";
+			}
+
+			if ( ! empty( $query_args[ $exact_match_param . '_excludes' ] ) ) {
+				$exact_match_arguments         = $query_args[ $exact_match_param . '_excludes' ];
+				$exact_match_arguments_escaped = array_map( 'esc_sql', explode( ',', $exact_match_arguments ) );
+				$excluded                      = implode( "','", $exact_match_arguments_escaped );
+				// 'country_includes' is a list of country codes, the others will be a list of customer ids.
+				$table_column    = 'country' === $exact_match_param ? $exact_match_param : 'customer_id';
+				$where_clauses[] = "{$customer_lookup_table}.{$table_column} NOT IN ('{$excluded}')";
+			}
+		}
+
+		$search_params = array(
+			'name',
+			'username',
+			'email',
+		);
+
+		if ( ! empty( $query_args['search'] ) ) {
+			$name_like = '%' . $wpdb->esc_like( $query_args['search'] ) . '%';
+
+			if ( empty( $query_args['searchby'] ) || 'name' === $query_args['searchby'] || ! in_array( $query_args['searchby'], $search_params, true ) ) {
+				$searchby = "CONCAT_WS( ' ', first_name, last_name )";
+			} else {
+				$searchby = $query_args['searchby'];
+			}
+
+			$where_clauses[] = $wpdb->prepare( "{$searchby} LIKE %s", $name_like ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+		}
+
+		// Allow a list of customer IDs to be specified.
+		if ( ! empty( $query_args['customers'] ) ) {
+			$included_customers = $this->get_filtered_ids( $query_args, 'customers' );
+			$where_clauses[]    = "{$customer_lookup_table}.customer_id IN ({$included_customers})";
+		}
+
+		$numeric_params = array(
+			'orders_count'    => array(
+				'column' => 'COUNT( order_id )',
+				'format' => '%d',
+			),
+			'total_spend'     => array(
+				'column' => 'SUM( total_sales )',
+				'format' => '%f',
+			),
+			'avg_order_value' => array(
+				'column' => '( SUM( total_sales ) / COUNT( order_id ) )',
+				'format' => '%f',
+			),
+		);
+
+		foreach ( $numeric_params as $numeric_param => $param_info ) {
+			$subclauses = array();
+			$min_param  = $numeric_param . '_min';
+			$max_param  = $numeric_param . '_max';
+			$or_equal   = isset( $query_args[ $min_param ] ) && isset( $query_args[ $max_param ] ) ? '=' : '';
+
+			if ( isset( $query_args[ $min_param ] ) ) {
+				$subclauses[] = $wpdb->prepare(
+					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare
+					"{$param_info['column']} >{$or_equal} {$param_info['format']}",
+					$query_args[ $min_param ]
+				);
+			}
+
+			if ( isset( $query_args[ $max_param ] ) ) {
+				$subclauses[] = $wpdb->prepare(
+					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare
+					"{$param_info['column']} <{$or_equal} {$param_info['format']}",
+					$query_args[ $max_param ]
+				);
+			}
+
+			if ( $subclauses ) {
+				$having_clauses[] = '(' . implode( ' AND ', $subclauses ) . ')';
+			}
+		}
+
+		if ( $where_clauses ) {
+			$preceding_match = empty( $this->get_sql_clause( 'where_time' ) ) ? ' AND ' : " {$match_operator} ";
+			$this->subquery->add_sql_clause( 'where', $preceding_match . implode( " {$match_operator} ", $where_clauses ) );
+		}
+
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		if ( $order_status_filter ) {
+			$this->subquery->add_sql_clause( 'left_join', "AND ( {$order_status_filter} )" );
+		}
+
+		if ( $having_clauses ) {
+			$preceding_match = empty( $this->get_sql_clause( 'having' ) ) ? ' AND ' : " {$match_operator} ";
+			$this->subquery->add_sql_clause( 'having', $preceding_match . implode( " {$match_operator} ", $having_clauses ) );
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$customers_table_name   = self::get_db_table_name();
+		$order_stats_table_name = $wpdb->prefix . 'wc_order_stats';
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'     => get_option( 'posts_per_page' ),
+			'page'         => 1,
+			'order'        => 'DESC',
+			'orderby'      => 'date_registered',
+			'order_before' => TimeInterval::default_before(),
+			'order_after'  => TimeInterval::default_after(),
+			'fields'       => '*',
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$selections       = $this->selected_columns( $query_args );
+			$sql_query_params = $this->add_sql_query_params( $query_args );
+			$count_query      = "SELECT COUNT(*) FROM (
+					{$this->subquery->get_query_statement()}
+				) as tt
+				";
+			$db_records_count = (int) $wpdb->get_var(
+				$count_query // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+			);
+
+			$params      = $this->get_limit_params( $query_args );
+			$total_pages = (int) ceil( $db_records_count / $params['per_page'] );
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return $data;
+			}
+
+			$this->subquery->clear_sql_clause( 'select' );
+			$this->subquery->add_sql_clause( 'select', $selections );
+			$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->subquery->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+
+			$customer_data = $wpdb->get_results(
+				$this->subquery->get_query_statement(), // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+				ARRAY_A
+			);
+
+			if ( null === $customer_data ) {
+				return $data;
+			}
+
+			$customer_data = array_map( array( $this, 'cast_numbers' ), $customer_data );
+			$data          = (object) array(
+				'data'    => $customer_data,
+				'total'   => $db_records_count,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Returns an existing customer ID for an order if one exists.
+	 *
+	 * @param object $order WC Order.
+	 * @return int|bool
+	 */
+	public static function get_existing_customer_id_from_order( $order ) {
+		global $wpdb;
+
+		if ( ! is_a( $order, 'WC_Order' ) ) {
+			return false;
+		}
+
+		$user_id = $order->get_customer_id();
+
+		if ( 0 === $user_id ) {
+			$customer_id = $wpdb->get_var(
+				$wpdb->prepare(
+					"SELECT customer_id FROM {$wpdb->prefix}wc_order_stats WHERE order_id = %d",
+					$order->get_id()
+				)
+			);
+
+			if ( $customer_id ) {
+				return $customer_id;
+			}
+
+			$email = $order->get_billing_email( 'edit' );
+
+			if ( $email ) {
+				return self::get_guest_id_by_email( $email );
+			} else {
+				return false;
+			}
+		} else {
+			return self::get_customer_id_by_user_id( $user_id );
+		}
+	}
+
+	/**
+	 * Get or create a customer from a given order.
+	 *
+	 * @param object $order WC Order.
+	 * @return int|bool
+	 */
+	public static function get_or_create_customer_from_order( $order ) {
+		if ( ! $order ) {
+			return false;
+		}
+
+		global $wpdb;
+
+		if ( ! is_a( $order, 'WC_Order' ) ) {
+			return false;
+		}
+
+		$returning_customer_id = self::get_existing_customer_id_from_order( $order );
+
+		if ( $returning_customer_id ) {
+			return $returning_customer_id;
+		}
+
+		list($data, $format) = self::get_customer_order_data_and_format( $order );
+
+		$result      = $wpdb->insert( self::get_db_table_name(), $data, $format );
+		$customer_id = $wpdb->insert_id;
+
+		/**
+		 * Fires when a new report customer is created.
+		 *
+		 * @param int $customer_id Customer ID.
+		 */
+		do_action( 'woocommerce_analytics_new_customer', $customer_id );
+
+		return $result ? $customer_id : false;
+	}
+
+	/**
+	 * Returns a data object and format object of the customers data coming from the order.
+	 *
+	 * @param object      $order         WC_Order where we get customer info from.
+	 * @param object|null $customer_user WC_Customer registered customer WP user.
+	 * @return array ($data, $format)
+	 */
+	public static function get_customer_order_data_and_format( $order, $customer_user = null ) {
+		$data   = array(
+			'first_name'       => $order->get_customer_first_name(),
+			'last_name'        => $order->get_customer_last_name(),
+			'email'            => $order->get_billing_email( 'edit' ),
+			'city'             => $order->get_billing_city( 'edit' ),
+			'state'            => $order->get_billing_state( 'edit' ),
+			'postcode'         => $order->get_billing_postcode( 'edit' ),
+			'country'          => $order->get_billing_country( 'edit' ),
+			'date_last_active' => gmdate( 'Y-m-d H:i:s', $order->get_date_created( 'edit' )->getTimestamp() ),
+		);
+		$format = array(
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+		);
+
+		// Add registered customer data.
+		if ( 0 !== $order->get_user_id() ) {
+			$user_id = $order->get_user_id();
+			if ( is_null( $customer_user ) ) {
+				$customer_user = new \WC_Customer( $user_id );
+			}
+			$data['user_id']         = $user_id;
+			$data['username']        = $customer_user->get_username( 'edit' );
+			$data['date_registered'] = $customer_user->get_date_created( 'edit' ) ? $customer_user->get_date_created( 'edit' )->date( TimeInterval::$sql_datetime_format ) : null;
+			$format[]                = '%d';
+			$format[]                = '%s';
+			$format[]                = '%s';
+		}
+		return array( $data, $format );
+	}
+
+	/**
+	 * Retrieve a guest ID (when user_id is null) by email.
+	 *
+	 * @param string $email Email address.
+	 * @return false|array Customer array if found, boolean false if not.
+	 */
+	public static function get_guest_id_by_email( $email ) {
+		global $wpdb;
+
+		$table_name  = self::get_db_table_name();
+		$customer_id = $wpdb->get_var(
+			$wpdb->prepare(
+				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT customer_id FROM {$table_name} WHERE email = %s AND user_id IS NULL LIMIT 1",
+				$email
+			)
+		);
+
+		return $customer_id ? (int) $customer_id : false;
+	}
+
+	/**
+	 * Retrieve a registered customer row id by user_id.
+	 *
+	 * @param string|int $user_id User ID.
+	 * @return false|int Customer ID if found, boolean false if not.
+	 */
+	public static function get_customer_id_by_user_id( $user_id ) {
+		global $wpdb;
+
+		$table_name  = self::get_db_table_name();
+		$customer_id = $wpdb->get_var(
+			$wpdb->prepare(
+				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT customer_id FROM {$table_name} WHERE user_id = %d LIMIT 1",
+				$user_id
+			)
+		);
+
+		return $customer_id ? (int) $customer_id : false;
+	}
+
+	/**
+	 * Retrieve the last order made by a customer.
+	 *
+	 * @param int $customer_id Customer ID.
+	 * @return object WC_Order|false.
+	 */
+	public static function get_last_order( $customer_id ) {
+		global $wpdb;
+		$orders_table = $wpdb->prefix . 'wc_order_stats';
+
+		$last_order = $wpdb->get_var(
+			$wpdb->prepare(
+				// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT order_id, date_created_gmt FROM {$orders_table}
+				WHERE customer_id = %d
+				ORDER BY date_created_gmt DESC, order_id DESC LIMIT 1",
+				// phpcs:enable
+				$customer_id
+			)
+		);
+		if ( ! $last_order ) {
+			return false;
+		}
+		return wc_get_order( absint( $last_order ) );
+	}
+
+	/**
+	 * Retrieve the oldest orders made by a customer.
+	 *
+	 * @param int $customer_id Customer ID.
+	 * @return array Orders.
+	 */
+	public static function get_oldest_orders( $customer_id ) {
+		global $wpdb;
+		$orders_table                = $wpdb->prefix . 'wc_order_stats';
+		$excluded_statuses           = array_map( array( __CLASS__, 'normalize_order_status' ), self::get_excluded_report_order_statuses() );
+		$excluded_statuses_condition = '';
+		if ( ! empty( $excluded_statuses ) ) {
+			$excluded_statuses_str       = implode( "','", $excluded_statuses );
+			$excluded_statuses_condition = "AND status NOT IN ('{$excluded_statuses_str}')";
+		}
+
+		return $wpdb->get_results(
+			$wpdb->prepare(
+				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT order_id, date_created FROM {$orders_table} WHERE customer_id = %d {$excluded_statuses_condition} ORDER BY date_created, order_id ASC LIMIT 2",
+				$customer_id
+			)
+		);
+	}
+
+	/**
+	 * Retrieve the amount of orders made by a customer.
+	 *
+	 * @param int $customer_id Customer ID.
+	 * @return int|null Amount of orders for customer or null on failure.
+	 */
+	public static function get_order_count( $customer_id ) {
+		global $wpdb;
+		$customer_id = absint( $customer_id );
+
+		if ( 0 === $customer_id ) {
+			return null;
+		}
+
+		$result = $wpdb->get_var(
+			$wpdb->prepare(
+				"SELECT COUNT( order_id ) FROM {$wpdb->prefix}wc_order_stats WHERE customer_id = %d",
+				$customer_id
+			)
+		);
+
+		if ( is_null( $result ) ) {
+			return null;
+		}
+
+		return (int) $result;
+	}
+
+	/**
+	 * Update the database with customer data.
+	 *
+	 * @param int $user_id WP User ID to update customer data for.
+	 * @return int|bool|null Number or rows modified or false on failure.
+	 */
+	public static function update_registered_customer( $user_id ) {
+		global $wpdb;
+
+		$customer = new \WC_Customer( $user_id );
+
+		if ( ! self::is_valid_customer( $user_id ) ) {
+			return false;
+		}
+
+		$last_order = $customer->get_last_order();
+
+		if ( ! $last_order ) {
+			$first_name = get_user_meta( $user_id, 'first_name', true );
+			$last_name  = get_user_meta( $user_id, 'last_name', true );
+		} else {
+			$first_name = $last_order->get_customer_first_name();
+			$last_name  = $last_order->get_customer_last_name();
+		}
+
+		$last_active = $customer->get_meta( 'wc_last_active', true, 'edit' );
+		$data        = array(
+			'user_id'          => $user_id,
+			'username'         => $customer->get_username( 'edit' ),
+			'first_name'       => $first_name,
+			'last_name'        => $last_name,
+			'email'            => $customer->get_email( 'edit' ),
+			'city'             => $customer->get_billing_city( 'edit' ),
+			'state'            => $customer->get_billing_state( 'edit' ),
+			'postcode'         => $customer->get_billing_postcode( 'edit' ),
+			'country'          => $customer->get_billing_country( 'edit' ),
+			'date_registered'  => $customer->get_date_created( 'edit' )->date( TimeInterval::$sql_datetime_format ),
+			'date_last_active' => $last_active ? gmdate( 'Y-m-d H:i:s', $last_active ) : null,
+		);
+		$format      = array(
+			'%d',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+			'%s',
+		);
+
+		$customer_id = self::get_customer_id_by_user_id( $user_id );
+
+		if ( $customer_id ) {
+			// Preserve customer_id for existing user_id.
+			$data['customer_id'] = $customer_id;
+			$format[]            = '%d';
+		}
+
+		$results = $wpdb->replace( self::get_db_table_name(), $data, $format );
+
+		/**
+		 * Fires when customser's reports are updated.
+		 *
+		 * @param int $customer_id Customer ID.
+		 */
+		do_action( 'woocommerce_analytics_update_customer', $customer_id );
+
+		ReportsCache::invalidate();
+
+		return $results;
+	}
+
+	/**
+	 * Check if a user ID is a valid customer or other user role with past orders.
+	 *
+	 * @param int $user_id User ID.
+	 * @return bool
+	 */
+	protected static function is_valid_customer( $user_id ) {
+		$customer = new \WC_Customer( $user_id );
+
+		if ( absint( $customer->get_id() ) !== absint( $user_id ) ) {
+			return false;
+		}
+
+		$customer_roles = (array) apply_filters( 'woocommerce_analytics_customer_roles', array( 'customer' ) );
+		if ( $customer->get_order_count() < 1 && ! in_array( $customer->get_role(), $customer_roles, true ) ) {
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Delete a customer lookup row.
+	 *
+	 * @param int $customer_id Customer ID.
+	 */
+	public static function delete_customer( $customer_id ) {
+		global $wpdb;
+
+		$customer_id = (int) $customer_id;
+		$num_deleted = $wpdb->delete( self::get_db_table_name(), array( 'customer_id' => $customer_id ) );
+
+		if ( $num_deleted ) {
+			/**
+			 * Fires when a customer is deleted.
+			 *
+			 * @param int $order_id Order ID.
+			 */
+			do_action( 'woocommerce_analytics_delete_customer', $customer_id );
+
+			ReportsCache::invalidate();
+		}
+	}
+
+	/**
+	 * Delete a customer lookup row by WordPress User ID.
+	 *
+	 * @param int $user_id WordPress User ID.
+	 */
+	public static function delete_customer_by_user_id( $user_id ) {
+		global $wpdb;
+
+		$user_id     = (int) $user_id;
+		$num_deleted = $wpdb->delete( self::get_db_table_name(), array( 'user_id' => $user_id ) );
+
+		if ( $num_deleted ) {
+			ReportsCache::invalidate();
+		}
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		$table_name     = self::get_db_table_name();
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'from', $table_name );
+		$this->subquery->add_sql_clause( 'select', "{$table_name}.customer_id" );
+		$this->subquery->add_sql_clause( 'group_by', "{$table_name}.customer_id" );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Customers/Query.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * Class for parameter-based Customers Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'registered_before'   => '2018-07-19 00:00:00',
+ *          'registered_after'    => '2018-07-05 00:00:00',
+ *          'page'                => 2,
+ *          'avg_order_value_min' => 100,
+ *          'country'             => 'GB',
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Customers\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Customers;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Customers\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Customers report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array(
+			'per_page' => get_option( 'posts_per_page' ), // not sure if this should be the default.
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'date_registered',
+			'fields'   => '*',
+		);
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_customers_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-customers' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_customers_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Customers/Stats/Controller.php

@@ -0,0 +1,390 @@
+<?php
+/**
+ * REST API Reports customers stats controller
+ *
+ * Handles requests to the /reports/customers/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Customers\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+
+/**
+ * REST API Reports customers stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/customers/stats';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                        = array();
+		$args['registered_before']   = $request['registered_before'];
+		$args['registered_after']    = $request['registered_after'];
+		$args['match']               = $request['match'];
+		$args['search']              = $request['search'];
+		$args['name_includes']       = $request['name_includes'];
+		$args['name_excludes']       = $request['name_excludes'];
+		$args['username_includes']   = $request['username_includes'];
+		$args['username_excludes']   = $request['username_excludes'];
+		$args['email_includes']      = $request['email_includes'];
+		$args['email_excludes']      = $request['email_excludes'];
+		$args['country_includes']    = $request['country_includes'];
+		$args['country_excludes']    = $request['country_excludes'];
+		$args['last_active_before']  = $request['last_active_before'];
+		$args['last_active_after']   = $request['last_active_after'];
+		$args['orders_count_min']    = $request['orders_count_min'];
+		$args['orders_count_max']    = $request['orders_count_max'];
+		$args['total_spend_min']     = $request['total_spend_min'];
+		$args['total_spend_max']     = $request['total_spend_max'];
+		$args['avg_order_value_min'] = $request['avg_order_value_min'];
+		$args['avg_order_value_max'] = $request['avg_order_value_max'];
+		$args['last_order_before']   = $request['last_order_before'];
+		$args['last_order_after']    = $request['last_order_after'];
+		$args['customers']           = $request['customers'];
+		$args['fields']              = $request['fields'];
+
+		$between_params_numeric    = array( 'orders_count', 'total_spend', 'avg_order_value' );
+		$normalized_params_numeric = TimeInterval::normalize_between_params( $request, $between_params_numeric, false );
+		$between_params_date       = array( 'last_active', 'registered' );
+		$normalized_params_date    = TimeInterval::normalize_between_params( $request, $between_params_date, true );
+		$args                      = array_merge( $args, $normalized_params_numeric, $normalized_params_date );
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args      = $this->prepare_reports_query( $request );
+		$customers_query = new Query( $query_args );
+		$report_data     = $customers_query->get_data();
+		$out_data        = array(
+			'totals' => $report_data,
+		);
+
+		return rest_ensure_response( $out_data );
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_customers_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		// @todo Should any of these be 'indicator's?
+		$totals = array(
+			'customers_count'     => array(
+				'description' => __( 'Number of customers.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'avg_orders_count'    => array(
+				'description' => __( 'Average number of orders.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'avg_total_spend'     => array(
+				'description' => __( 'Average total spend per customer.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'format'      => 'currency',
+			),
+			'avg_avg_order_value' => array(
+				'description' => __( 'Average AOV per customer.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'format'      => 'currency',
+			),
+		);
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_customers_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals' => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                            = array();
+		$params['context']                 = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['registered_before']       = array(
+			'description'       => __( 'Limit response to objects registered before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['registered_after']        = array(
+			'description'       => __( 'Limit response to objects registered after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['match']                   = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: status_is, status_is_not, product_includes, product_excludes, coupon_includes, coupon_excludes, customer, categories', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['search']                  = array(
+			'description'       => __( 'Limit response to objects with a customer field containing the search term. Searches the field provided by `searchby`.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['searchby']                = array(
+			'description' => 'Limit results with `search` and `searchby` to specific fields containing the search term.',
+			'type'        => 'string',
+			'default'     => 'name',
+			'enum'        => array(
+				'name',
+				'username',
+				'email',
+			),
+		);
+		$params['name_includes']           = array(
+			'description'       => __( 'Limit response to objects with specfic names.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['name_excludes']           = array(
+			'description'       => __( 'Limit response to objects excluding specfic names.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['username_includes']       = array(
+			'description'       => __( 'Limit response to objects with specfic usernames.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['username_excludes']       = array(
+			'description'       => __( 'Limit response to objects excluding specfic usernames.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['email_includes']          = array(
+			'description'       => __( 'Limit response to objects including emails.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['email_excludes']          = array(
+			'description'       => __( 'Limit response to objects excluding emails.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['country_includes']        = array(
+			'description'       => __( 'Limit response to objects with specfic countries.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['country_excludes']        = array(
+			'description'       => __( 'Limit response to objects excluding specfic countries.', 'woocommerce' ),
+			'type'              => 'string',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_active_before']      = array(
+			'description'       => __( 'Limit response to objects last active before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_active_after']       = array(
+			'description'       => __( 'Limit response to objects last active after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_active_between']     = array(
+			'description'       => __( 'Limit response to objects last active between two given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_date_arg' ),
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+		$params['registered_before']       = array(
+			'description'       => __( 'Limit response to objects registered before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['registered_after']        = array(
+			'description'       => __( 'Limit response to objects registered after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['registered_between']      = array(
+			'description'       => __( 'Limit response to objects last active between two given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_date_arg' ),
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+		$params['orders_count_min']        = array(
+			'description'       => __( 'Limit response to objects with an order count greater than or equal to given integer.', 'woocommerce' ),
+			'type'              => 'integer',
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orders_count_max']        = array(
+			'description'       => __( 'Limit response to objects with an order count less than or equal to given integer.', 'woocommerce' ),
+			'type'              => 'integer',
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orders_count_between']    = array(
+			'description'       => __( 'Limit response to objects with an order count between two given integers.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_numeric_arg' ),
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['total_spend_min']         = array(
+			'description'       => __( 'Limit response to objects with a total order spend greater than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['total_spend_max']         = array(
+			'description'       => __( 'Limit response to objects with a total order spend less than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['total_spend_between']     = array(
+			'description'       => __( 'Limit response to objects with a total order spend between two given numbers.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_numeric_arg' ),
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['avg_order_value_min']     = array(
+			'description'       => __( 'Limit response to objects with an average order spend greater than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['avg_order_value_max']     = array(
+			'description'       => __( 'Limit response to objects with an average order spend less than or equal to given number.', 'woocommerce' ),
+			'type'              => 'number',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['avg_order_value_between'] = array(
+			'description'       => __( 'Limit response to objects with an average order spend between two given numbers.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => array( '\Automattic\WooCommerce\Admin\API\Reports\TimeInterval', 'rest_validate_between_numeric_arg' ),
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['last_order_before']       = array(
+			'description'       => __( 'Limit response to objects with last order before (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['last_order_after']        = array(
+			'description'       => __( 'Limit response to objects with last order after (or at) a given ISO8601 compliant datetime.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['customers']               = array(
+			'description'       => __( 'Limit result to items with specified customer ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['fields']                  = array(
+			'description'       => __( 'Limit stats fields to the specified items.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Customers/Stats/DataStore.php

@@ -0,0 +1,128 @@
+<?php
+/**
+ * API\Reports\Customers\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Customers\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Customers\DataStore as CustomersDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+
+/**
+ * API\Reports\Customers\Stats\DataStore.
+ */
+class DataStore extends CustomersDataStore implements DataStoreInterface {
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'customers_count'     => 'intval',
+		'avg_orders_count'    => 'floatval',
+		'avg_total_spend'     => 'floatval',
+		'avg_avg_order_value' => 'floatval',
+	);
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'customers_stats';
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'customers_stats';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$this->report_columns = array(
+			'customers_count'     => 'COUNT( * ) as customers_count',
+			'avg_orders_count'    => 'AVG( orders_count ) as avg_orders_count',
+			'avg_total_spend'     => 'AVG( total_spend ) as avg_total_spend',
+			'avg_avg_order_value' => 'AVG( avg_order_value ) as avg_avg_order_value',
+		);
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$customers_table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page' => get_option( 'posts_per_page' ),
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'date_registered',
+			'fields'   => '*',
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'customers_count'     => 0,
+				'avg_orders_count'    => 0,
+				'avg_total_spend'     => 0.0,
+				'avg_avg_order_value' => 0.0,
+			);
+
+			$selections = $this->selected_columns( $query_args );
+			$this->add_sql_query_params( $query_args );
+			// Clear SQL clauses set for parent class queries that are different here.
+			$this->subquery->clear_sql_clause( 'select' );
+			$this->subquery->add_sql_clause( 'select', 'SUM( total_sales ) AS total_spend,' );
+			$this->subquery->add_sql_clause(
+				'select',
+				'SUM( CASE WHEN parent_id = 0 THEN 1 END ) as orders_count,'
+			);
+			$this->subquery->add_sql_clause(
+				'select',
+				'CASE WHEN SUM( CASE WHEN parent_id = 0 THEN 1 ELSE 0 END ) = 0 THEN NULL ELSE SUM( total_sales ) / SUM( CASE WHEN parent_id = 0 THEN 1 ELSE 0 END ) END AS avg_order_value'
+			);
+
+			$this->clear_sql_clause( array( 'order_by', 'limit' ) );
+			$this->add_sql_clause( 'select', $selections );
+			$this->add_sql_clause( 'from', "({$this->subquery->get_query_statement()}) AS tt" );
+
+			$report_data = $wpdb->get_results(
+				$this->get_query_statement(), // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+				ARRAY_A
+			);
+
+			if ( null === $report_data ) {
+				return $data;
+			}
+
+			$data = (object) $this->cast_numbers( $report_data[0] );
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Customers/Stats/Query.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * Class for parameter-based Customers Report Stats querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'registered_before'   => '2018-07-19 00:00:00',
+ *          'registered_after'    => '2018-07-05 00:00:00',
+ *          'page'                => 2,
+ *          'avg_order_value_min' => 100,
+ *          'country'             => 'GB',
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Customers\Stats\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Customers\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Customers\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Customers report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array(
+			'per_page' => get_option( 'posts_per_page' ), // not sure if this should be the default.
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'date_registered',
+			'fields'   => '*', // @todo Needed?
+		);
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_customers_stats_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-customers-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_customers_stats_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/DataStoreInterface.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * Reports Data Store Interface
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * WooCommerce Reports data store interface.
+ *
+ * @since 3.5.0
+ */
+interface DataStoreInterface {
+
+	/**
+	 * Get the data based on args.
+	 *
+	 * @param array $args Query parameters.
+	 * @return stdClass|WP_Error
+	 */
+	public function get_data( $args );
+}

packages/woocommerce-admin/src/API/Reports/Downloads/Controller.php

@@ -0,0 +1,439 @@
+<?php
+/**
+ * REST API Reports downloads controller
+ *
+ * Handles requests to the /reports/downloads endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Downloads;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Controller as ReportsController;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+
+/**
+ * REST API Reports downloads controller class.
+ *
+ * @extends Automattic\WooCommerce\Admin\API\Reports\Controller
+ */
+class Controller extends ReportsController implements ExportableInterface {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/downloads';
+
+	/**
+	 * Get items.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$args       = array();
+		$registered = array_keys( $this->get_collection_params() );
+		foreach ( $registered as $param_name ) {
+			if ( isset( $request[ $param_name ] ) ) {
+				$args[ $param_name ] = $request[ $param_name ];
+			}
+		}
+
+		$reports        = new Query( $args );
+		$downloads_data = $reports->get_data();
+
+		$data = array();
+
+		foreach ( $downloads_data->data as $download_data ) {
+			$item   = $this->prepare_item_for_response( $download_data, $request );
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+
+		$response->header( 'X-WP-Total', (int) $downloads_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $downloads_data->pages );
+
+		$page      = $downloads_data->page_no;
+		$max_pages = $downloads_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $report ) );
+
+		$response->data['date'] = get_date_from_gmt( $data['date_gmt'], 'Y-m-d H:i:s' );
+
+		// Figure out file name.
+		// Matches https://github.com/woocommerce/woocommerce/blob/4be0018c092e617c5d2b8c46b800eb71ece9ddef/includes/class-wc-download-handler.php#L197.
+		$product_id = intval( $data['product_id'] );
+		$_product   = wc_get_product( $product_id );
+
+		// Make sure the product hasn't been deleted.
+		if ( $_product ) {
+			$file_path                   = $_product->get_file_download_path( $data['download_id'] );
+			$filename                    = basename( $file_path );
+			$response->data['file_name'] = apply_filters( 'woocommerce_file_download_filename', $filename, $product_id );
+			$response->data['file_path'] = $file_path;
+		} else {
+			$response->data['file_name'] = '';
+			$response->data['file_path'] = '';
+		}
+
+		$customer                       = new \WC_Customer( $data['user_id'] );
+		$response->data['username']     = $customer->get_username();
+		$response->data['order_number'] = $this->get_order_number( $data['order_id'] );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_downloads', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param Array $object Object data.
+	 * @return array        Links for the given post.
+	 */
+	protected function prepare_links( $object ) {
+		$links = array(
+			'product' => array(
+				'href'       => rest_url( sprintf( '/%s/%s/%d', $this->namespace, 'products', $object['product_id'] ) ),
+				'embeddable' => true,
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_downloads',
+			'type'       => 'object',
+			'properties' => array(
+				'id'           => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'ID.', 'woocommerce' ),
+				),
+				'product_id'   => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Product ID.', 'woocommerce' ),
+				),
+				'date'         => array(
+					'description' => __( "The date of the download, in the site's timezone.", 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_gmt'     => array(
+					'description' => __( 'The date of the download, as GMT.', 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'download_id'  => array(
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Download ID.', 'woocommerce' ),
+				),
+				'file_name'    => array(
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'File name.', 'woocommerce' ),
+				),
+				'file_path'    => array(
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'File URL.', 'woocommerce' ),
+				),
+				'order_id'     => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Order ID.', 'woocommerce' ),
+				),
+				'order_number' => array(
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Order Number.', 'woocommerce' ),
+				),
+				'user_id'      => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'User ID for the downloader.', 'woocommerce' ),
+				),
+				'username'     => array(
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'User name of the downloader.', 'woocommerce' ),
+				),
+				'ip_address'   => array(
+					'type'        => 'string',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'IP address for the downloader.', 'woocommerce' ),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                        = array();
+		$params['context']             = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']                = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']            = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']               = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']              = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']               = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']             = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'product',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['match']               = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: products, orders, username, ip_address.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_includes']    = array(
+			'description'       => __( 'Limit result set to items that have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_excludes']    = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['order_includes']      = array(
+			'description'       => __( 'Limit result set to items that have the specified order ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['order_excludes']      = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified order ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['customer_includes']   = array(
+			'description'       => __( 'Limit response to objects that have the specified user ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['customer_excludes']   = array(
+			'description'       => __( 'Limit response to objects that don\'t have the specified user ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['ip_address_includes'] = array(
+			'description'       => __( 'Limit response to objects that have a specified ip address.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		$params['ip_address_excludes'] = array(
+			'description'       => __( 'Limit response to objects that don\'t have a specified ip address.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'date'         => __( 'Date', 'woocommerce' ),
+			'product'      => __( 'Product title', 'woocommerce' ),
+			'file_name'    => __( 'File name', 'woocommerce' ),
+			'order_number' => __( 'Order #', 'woocommerce' ),
+			'user_id'      => __( 'User Name', 'woocommerce' ),
+			'ip_address'   => __( 'IP', 'woocommerce' ),
+		);
+
+		/**
+		 * Filter to add or remove column names from the downloads report for
+		 * export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_filter_downloads_export_columns',
+			$export_columns
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$export_item = array(
+			'date'         => $item['date'],
+			'product'      => $item['_embedded']['product'][0]['name'],
+			'file_name'    => $item['file_name'],
+			'order_number' => $item['order_number'],
+			'user_id'      => $item['username'],
+			'ip_address'   => $item['ip_address'],
+		);
+
+		/**
+		 * Filter to prepare extra columns in the export item for the downloads
+		 * report.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_downloads_prepare_export_item',
+			$export_item,
+			$item
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Downloads/DataStore.php

@@ -0,0 +1,389 @@
+<?php
+/**
+ * API\Reports\Downloads\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Downloads;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Downloads\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_download_log';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'downloads';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'id'          => 'intval',
+		'date'        => 'strval',
+		'date_gmt'    => 'strval',
+		'download_id' => 'strval', // String because this can sometimes be a hash.
+		'file_name'   => 'strval',
+		'product_id'  => 'intval',
+		'order_id'    => 'intval',
+		'user_id'     => 'intval',
+		'ip_address'  => 'strval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'downloads';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$this->report_columns = array(
+			'id'          => 'download_log_id as id',
+			'date'        => 'timestamp as date_gmt',
+			'download_id' => 'product_permissions.download_id',
+			'product_id'  => 'product_permissions.product_id',
+			'order_id'    => 'product_permissions.order_id',
+			'user_id'     => 'product_permissions.user_id',
+			'ip_address'  => 'user_ip_address as ip_address',
+		);
+	}
+
+	/**
+	 * Updates the database query with parameters used for downloads report.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+
+		$lookup_table     = self::get_db_table_name();
+		$permission_table = $wpdb->prefix . 'woocommerce_downloadable_product_permissions';
+		$operator         = $this->get_match_operator( $query_args );
+		$where_filters    = array();
+		$join             = "JOIN {$permission_table} as product_permissions ON {$lookup_table}.permission_id = product_permissions.permission_id";
+
+		$where_time = $this->add_time_period_sql_params( $query_args, $lookup_table );
+		if ( $where_time ) {
+			if ( isset( $this->subquery ) ) {
+				$this->subquery->add_sql_clause( 'where_time', $where_time );
+			} else {
+				$this->interval_query->add_sql_clause( 'where_time', $where_time );
+			}
+		}
+		$this->get_limit_sql_params( $query_args );
+
+		$where_filters[] = $this->get_object_where_filter(
+			$lookup_table,
+			'permission_id',
+			$permission_table,
+			'product_id',
+			'IN',
+			$this->get_included_products( $query_args )
+		);
+		$where_filters[] = $this->get_object_where_filter(
+			$lookup_table,
+			'permission_id',
+			$permission_table,
+			'product_id',
+			'NOT IN',
+			$this->get_excluded_products( $query_args )
+		);
+		$where_filters[] = $this->get_object_where_filter(
+			$lookup_table,
+			'permission_id',
+			$permission_table,
+			'order_id',
+			'IN',
+			$this->get_included_orders( $query_args )
+		);
+		$where_filters[] = $this->get_object_where_filter(
+			$lookup_table,
+			'permission_id',
+			$permission_table,
+			'order_id',
+			'NOT IN',
+			$this->get_excluded_orders( $query_args )
+		);
+
+		$customer_lookup_table = $wpdb->prefix . 'wc_customer_lookup';
+		$customer_lookup       = "SELECT {$customer_lookup_table}.user_id FROM {$customer_lookup_table} WHERE {$customer_lookup_table}.customer_id IN (%s)";
+		$included_customers    = $this->get_included_customers( $query_args );
+		$excluded_customers    = $this->get_excluded_customers( $query_args );
+		if ( $included_customers ) {
+			$where_filters[] = $this->get_object_where_filter(
+				$lookup_table,
+				'permission_id',
+				$permission_table,
+				'user_id',
+				'IN',
+				sprintf( $customer_lookup, $included_customers )
+			);
+		}
+
+		if ( $excluded_customers ) {
+			$where_filters[] = $this->get_object_where_filter(
+				$lookup_table,
+				'permission_id',
+				$permission_table,
+				'user_id',
+				'NOT IN',
+				sprintf( $customer_lookup, $excluded_customers )
+			);
+		}
+
+		$included_ip_addresses = $this->get_included_ip_addresses( $query_args );
+		$excluded_ip_addresses = $this->get_excluded_ip_addresses( $query_args );
+		if ( $included_ip_addresses ) {
+			$where_filters[] = "{$lookup_table}.user_ip_address IN ('{$included_ip_addresses}')";
+		}
+
+		if ( $excluded_ip_addresses ) {
+			$where_filters[] = "{$lookup_table}.user_ip_address NOT IN ('{$excluded_ip_addresses}')";
+		}
+
+		$where_filters   = array_filter( $where_filters );
+		$where_subclause = implode( " $operator ", $where_filters );
+		if ( $where_subclause ) {
+			if ( isset( $this->subquery ) ) {
+				$this->subquery->add_sql_clause( 'where', "AND ( $where_subclause )" );
+			} else {
+				$this->interval_query->add_sql_clause( 'where', "AND ( $where_subclause )" );
+			}
+		}
+
+		if ( isset( $this->subquery ) ) {
+			$this->subquery->add_sql_clause( 'join', $join );
+		} else {
+			$this->interval_query->add_sql_clause( 'join', $join );
+		}
+		$this->add_order_by( $query_args );
+	}
+
+	/**
+	 * Returns comma separated ids of included ip address, based on query arguments from the user.
+	 *
+	 * @param array $query_args Parameters supplied by the user.
+	 * @return string
+	 */
+	protected function get_included_ip_addresses( $query_args ) {
+		if ( isset( $query_args['ip_address_includes'] ) && is_array( $query_args['ip_address_includes'] ) && count( $query_args['ip_address_includes'] ) > 0 ) {
+			$query_args['ip_address_includes'] = array_map( 'esc_sql', $query_args['ip_address_includes'] );
+		}
+		return self::get_filtered_ids( $query_args, 'ip_address_includes', "','" );
+	}
+
+	/**
+	 * Returns comma separated ids of excluded ip address, based on query arguments from the user.
+	 *
+	 * @param array $query_args Parameters supplied by the user.
+	 * @return string
+	 */
+	protected function get_excluded_ip_addresses( $query_args ) {
+		if ( isset( $query_args['ip_address_excludes'] ) && is_array( $query_args['ip_address_excludes'] ) && count( $query_args['ip_address_excludes'] ) > 0 ) {
+			$query_args['ip_address_excludes'] = array_map( 'esc_sql', $query_args['ip_address_excludes'] );
+		}
+		return self::get_filtered_ids( $query_args, 'ip_address_excludes', "','" );
+	}
+
+	/**
+	 * Returns comma separated ids of included customers, based on query arguments from the user.
+	 *
+	 * @param array $query_args Parameters supplied by the user.
+	 * @return string
+	 */
+	protected function get_included_customers( $query_args ) {
+		return self::get_filtered_ids( $query_args, 'customer_includes' );
+	}
+
+	/**
+	 * Returns comma separated ids of excluded customers, based on query arguments from the user.
+	 *
+	 * @param array $query_args Parameters supplied by the user.
+	 * @return string
+	 */
+	protected function get_excluded_customers( $query_args ) {
+		return self::get_filtered_ids( $query_args, 'customer_excludes' );
+	}
+
+	/**
+	 * Gets WHERE time clause of SQL request with date-related constraints.
+	 *
+	 * @param array  $query_args Parameters supplied by the user.
+	 * @param string $table_name Name of the db table relevant for the date constraint.
+	 * @return string
+	 */
+	protected function add_time_period_sql_params( $query_args, $table_name ) {
+		$where_time = '';
+		if ( $query_args['before'] ) {
+			$datetime_str = $query_args['before']->format( TimeInterval::$sql_datetime_format );
+			$where_time  .= " AND {$table_name}.timestamp <= '$datetime_str'";
+
+		}
+
+		if ( $query_args['after'] ) {
+			$datetime_str = $query_args['after']->format( TimeInterval::$sql_datetime_format );
+			$where_time  .= " AND {$table_name}.timestamp >= '$datetime_str'";
+		}
+
+		return $where_time;
+	}
+
+	/**
+	 * Fills ORDER BY clause of SQL request based on user supplied parameters.
+	 *
+	 * @param array $query_args Parameters supplied by the user.
+	 */
+	protected function add_order_by( $query_args ) {
+		global $wpdb;
+		$this->clear_sql_clause( 'order_by' );
+		$order_by = '';
+		if ( isset( $query_args['orderby'] ) ) {
+			$order_by = $this->normalize_order_by( $query_args['orderby'] );
+			$this->add_sql_clause( 'order_by', $order_by );
+		}
+
+		if ( false !== strpos( $order_by, '_products' ) ) {
+			$this->subquery->add_sql_clause( 'join', "JOIN {$wpdb->posts} AS _products ON product_permissions.product_id = _products.ID" );
+		}
+
+		$this->add_orderby_order_clause( $query_args, $this );
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page' => get_option( 'posts_per_page' ),
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'timestamp',
+			'before'   => TimeInterval::default_before(),
+			'after'    => TimeInterval::default_after(),
+			'fields'   => '*',
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$selections = $this->selected_columns( $query_args );
+			$this->add_sql_query_params( $query_args );
+
+			$db_records_count = (int) $wpdb->get_var(
+				"SELECT COUNT(*) FROM (
+					{$this->subquery->get_query_statement()}
+				) AS tt"
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			$params      = $this->get_limit_params( $query_args );
+			$total_pages = (int) ceil( $db_records_count / $params['per_page'] );
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return $data;
+			}
+
+			$this->subquery->clear_sql_clause( 'select' );
+			$this->subquery->add_sql_clause( 'select', $selections );
+			$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->subquery->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+
+			$download_data = $wpdb->get_results(
+				$this->subquery->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $download_data ) {
+				return $data;
+			}
+
+			$download_data = array_map( array( $this, 'cast_numbers' ), $download_data );
+			$data          = (object) array(
+				'data'    => $download_data,
+				'total'   => $db_records_count,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Maps ordering specified by the user to columns in the database/fields in the data.
+	 *
+	 * @param string $order_by Sorting criterion.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		global $wpdb;
+
+		if ( 'date' === $order_by ) {
+			return $wpdb->prefix . 'wc_download_log.timestamp';
+		}
+
+		if ( 'product' === $order_by ) {
+			return '_products.post_title';
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		$table_name     = self::get_db_table_name();
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'from', $table_name );
+		$this->subquery->add_sql_clause( 'select', "{$table_name}.download_log_id" );
+		$this->subquery->add_sql_clause( 'group_by', "{$table_name}.download_log_id" );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Downloads/Files/Controller.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * REST API Reports downloads files controller
+ *
+ * Handles requests to the /reports/downloads/files endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Downloads\Files;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Reports downloads files controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/downloads/files';
+}

packages/woocommerce-admin/src/API/Reports/Downloads/Query.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * Class for parameter-based downloads report querying.
+ *
+ * Example usage:
+ * $args = array(
+ *      'before'       => '2018-07-19 00:00:00',
+ *      'after'        => '2018-07-05 00:00:00',
+ *      'page'         => 2,
+ *      'products'     => array(1,2,3)
+ * );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Downloads\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Downloads;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Downloads\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for downloads report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get downloads data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_downloads_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-downloads' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_downloads_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Downloads/Stats/Controller.php

@@ -0,0 +1,382 @@
+<?php
+/**
+ * REST API Reports downloads stats controller
+ *
+ * Handles requests to the /reports/downloads/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Downloads\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Reports downloads stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/downloads/stats';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                        = array();
+		$args['before']              = $request['before'];
+		$args['after']               = $request['after'];
+		$args['interval']            = $request['interval'];
+		$args['page']                = $request['page'];
+		$args['per_page']            = $request['per_page'];
+		$args['orderby']             = $request['orderby'];
+		$args['order']               = $request['order'];
+		$args['match']               = $request['match'];
+		$args['product_includes']    = (array) $request['product_includes'];
+		$args['product_excludes']    = (array) $request['product_excludes'];
+		$args['customer_includes']   = (array) $request['customer_includes'];
+		$args['customer_excludes']   = (array) $request['customer_excludes'];
+		$args['order_includes']      = (array) $request['order_includes'];
+		$args['order_excludes']      = (array) $request['order_excludes'];
+		$args['ip_address_includes'] = (array) $request['ip_address_includes'];
+		$args['ip_address_excludes'] = (array) $request['ip_address_excludes'];
+		$args['fields']              = $request['fields'];
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args      = $this->prepare_reports_query( $request );
+		$downloads_query = new Query( $query_args );
+		$report_data     = $downloads_query->get_data();
+
+		$out_data = array(
+			'totals'    => get_object_vars( $report_data->totals ),
+			'intervals' => array(),
+		);
+
+		foreach ( $report_data->intervals as $interval_data ) {
+			$item                    = $this->prepare_item_for_response( $interval_data, $request );
+			$out_data['intervals'][] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_downloads_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$totals = array(
+			'download_count' => array(
+				'title'       => __( 'Downloads', 'woocommerce' ),
+				'description' => __( 'Number of downloads.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+			),
+		);
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_orders_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals'    => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+				'intervals' => array(
+					'description' => __( 'Reports data grouped by intervals.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'object',
+						'properties' => array(
+							'interval'       => array(
+								'description' => __( 'Type of interval.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'enum'        => array( 'day', 'week', 'month', 'year' ),
+							),
+							'date_start'     => array(
+								'description' => __( "The date the report start, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_start_gmt' => array(
+								'description' => __( 'The date the report start, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end'       => array(
+								'description' => __( "The date the report end, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end_gmt'   => array(
+								'description' => __( 'The date the report end, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'subtotals'      => array(
+								'description' => __( 'Interval subtotals.', 'woocommerce' ),
+								'type'        => 'object',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'properties'  => $totals,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                     = array();
+		$params['context']          = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']             = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']         = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']            = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']           = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']            = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']          = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'download_count',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']         = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['match']            = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: status_is, status_is_not, product_includes, product_excludes, coupon_includes, coupon_excludes, customer, categories', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_includes'] = array(
+			'description'       => __( 'Limit result set to items that have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+
+		);
+		$params['product_excludes']    = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['order_includes']      = array(
+			'description'       => __( 'Limit result set to items that have the specified order ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['order_excludes']      = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified order ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['customer_includes']   = array(
+			'description'       => __( 'Limit response to objects that have the specified customer ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['customer_excludes']   = array(
+			'description'       => __( 'Limit response to objects that don\'t have the specified customer ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['ip_address_includes'] = array(
+			'description'       => __( 'Limit response to objects that have a specified ip address.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		$params['ip_address_excludes'] = array(
+			'description'       => __( 'Limit response to objects that don\'t have a specified ip address.', 'woocommerce' ),
+			'type'              => 'array',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+		$params['fields']              = array(
+			'description'       => __( 'Limit stats fields to the specified items.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Downloads/Stats/DataStore.php

@@ -0,0 +1,188 @@
+<?php
+/**
+ * API\Reports\Downloads\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Downloads\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Downloads\DataStore as DownloadsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Downloads\Stats\DataStore.
+ */
+class DataStore extends DownloadsDataStore implements DataStoreInterface {
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'download_count' => 'intval',
+	);
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'downloads_stats';
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'downloads_stats';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$this->report_columns = array(
+			'download_count' => 'COUNT(DISTINCT download_log_id) as download_count',
+		);
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page' => get_option( 'posts_per_page' ),
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'date',
+			'fields'   => '*',
+			'interval' => 'week',
+			'before'   => TimeInterval::default_before(),
+			'after'    => TimeInterval::default_after(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+			$selections = $this->selected_columns( $query_args );
+			$this->add_sql_query_params( $query_args );
+			$this->add_time_period_sql_params( $query_args, $table_name );
+			$this->add_intervals_sql_params( $query_args, $table_name );
+
+			$this->interval_query->add_sql_clause( 'select', $this->get_sql_clause( 'select' ) . ' AS time_interval' );
+			$this->interval_query->str_replace_clause( 'select', 'date_created', 'timestamp' );
+			$this->interval_query->str_replace_clause( 'where_time', 'date_created', 'timestamp' );
+
+			$db_intervals = $wpdb->get_col(
+				$this->interval_query->get_query_statement()
+			); // WPCS: cache ok, DB call ok, , unprepared SQL ok.
+
+			$db_records_count = count( $db_intervals );
+
+			$params                  = $this->get_limit_params( $query_args );
+			$expected_interval_count = TimeInterval::intervals_between( $query_args['after'], $query_args['before'], $query_args['interval'] );
+			$total_pages             = (int) ceil( $expected_interval_count / $params['per_page'] );
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return array();
+			}
+
+			$this->update_intervals_sql_params( $query_args, $db_records_count, $expected_interval_count, $table_name );
+			$this->interval_query->str_replace_clause( 'where_time', 'date_created', 'timestamp' );
+			$this->total_query->add_sql_clause( 'select', $selections );
+			$this->total_query->add_sql_clause( 'where', $this->interval_query->get_sql_clause( 'where' ) );
+			$totals = $wpdb->get_results(
+				$this->total_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $totals ) {
+				return new \WP_Error( 'woocommerce_analytics_downloads_stats_result_failed', __( 'Sorry, fetching downloads data failed.', 'woocommerce' ) );
+			}
+
+			$this->interval_query->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->interval_query->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+			$this->interval_query->add_sql_clause( 'select', ', MAX(timestamp) AS datetime_anchor' );
+			if ( '' !== $selections ) {
+				$this->interval_query->add_sql_clause( 'select', ', ' . $selections );
+			}
+
+			$intervals = $wpdb->get_results(
+				$this->interval_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $intervals ) {
+				return new \WP_Error( 'woocommerce_analytics_downloads_stats_result_failed', __( 'Sorry, fetching downloads data failed.', 'woocommerce' ) );
+			}
+
+			$totals = (object) $this->cast_numbers( $totals[0] );
+			$data   = (object) array(
+				'totals'    => $totals,
+				'intervals' => $intervals,
+				'total'     => $expected_interval_count,
+				'pages'     => $total_pages,
+				'page_no'   => (int) $query_args['page'],
+			);
+
+			if ( $this->intervals_missing( $expected_interval_count, $db_records_count, $params['per_page'], $query_args['page'], $query_args['order'], $query_args['orderby'], count( $intervals ) ) ) {
+				$this->fill_in_missing_intervals( $db_intervals, $query_args['adj_after'], $query_args['adj_before'], $query_args['interval'], $data );
+				$this->sort_intervals( $data, $query_args['orderby'], $query_args['order'] );
+				$this->remove_extra_records( $data, $query_args['page'], $params['per_page'], $db_records_count, $expected_interval_count, $query_args['orderby'], $query_args['order'] );
+			} else {
+				$this->update_interval_boundary_dates( $query_args['after'], $query_args['before'], $query_args['interval'], $data->intervals );
+			}
+			$this->create_interval_subtotals( $data->intervals );
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Normalizes order_by clause to match to SQL query.
+	 *
+	 * @param string $order_by Order by option requeste by user.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return 'time_interval';
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		unset( $this->subquery );
+		$this->total_query = new SqlQuery( $this->context . '_total' );
+		$this->total_query->add_sql_clause( 'from', self::get_db_table_name() );
+
+		$this->interval_query = new SqlQuery( $this->context . '_interval' );
+		$this->interval_query->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->interval_query->add_sql_clause( 'group_by', 'time_interval' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Downloads/Stats/Query.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * Class for parameter-based downloads Reports querying
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Downloads\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Downloads\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Orders report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get revenue data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_downloads_stats_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-downloads-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_downloads_stats_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Export/Controller.php

@@ -0,0 +1,248 @@
+<?php
+/**
+ * REST API Reports Export Controller
+ *
+ * Handles requests to:
+ * - /reports/[report]/export
+ * - /reports/[report]/export/[id]/status
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Export;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\ReportExporter;
+
+/**
+ * Reports Export controller.
+ *
+ * @extends \Automattic\WooCommerce\Admin\API\Reports\Controller
+ */
+class Controller extends \Automattic\WooCommerce\Admin\API\Reports\Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/(?P<type>[a-z]+)/export';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'export_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_export_collection_params(),
+				),
+				'schema' => array( $this, 'get_export_public_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/(?P<export_id>[a-z0-9]+)/status',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'export_status' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_export_status_public_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_export_collection_params() {
+		$params                = array();
+		$params['report_args'] = array(
+			'description'       => __( 'Parameters to pass on to the exported report.', 'woocommerce' ),
+			'type'              => 'object',
+			'validate_callback' => 'rest_validate_request_arg', // @todo: use each controller's schema?
+		);
+		$params['email']       = array(
+			'description'       => __( 'When true, email a link to download the export to the requesting user.', 'woocommerce' ),
+			'type'              => 'boolean',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+
+	/**
+	 * Get the Report Export's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_export_public_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_export',
+			'type'       => 'object',
+			'properties' => array(
+				'status'    => array(
+					'description' => __( 'Export status.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'message'   => array(
+					'description' => __( 'Export status message.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'export_id' => array(
+					'description' => __( 'Export ID.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the Export status schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_export_status_public_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_export_status',
+			'type'       => 'object',
+			'properties' => array(
+				'percent_complete' => array(
+					'description' => __( 'Percentage complete.', 'woocommerce' ),
+					'type'        => 'int',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'download_url'     => array(
+					'description' => __( 'Export download URL.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Export data based on user request params.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function export_items( $request ) {
+		$report_type = $request['type'];
+		$report_args = empty( $request['report_args'] ) ? array() : $request['report_args'];
+		$send_email  = isset( $request['email'] ) ? $request['email'] : false;
+
+		$default_export_id = str_replace( '.', '', microtime( true ) );
+		$export_id         = apply_filters( 'woocommerce_admin_export_id', $default_export_id );
+		$export_id 		   = (string) sanitize_file_name( $export_id );
+
+		$total_rows = ReportExporter::queue_report_export( $export_id, $report_type, $report_args, $send_email );
+
+		if ( 0 === $total_rows ) {
+			return rest_ensure_response(
+				array(
+					'message' => __( 'There is no data to export for the given request.', 'woocommerce' ),
+				)
+			);
+		}
+
+		ReportExporter::update_export_percentage_complete( $report_type, $export_id, 0 );
+
+		$response = rest_ensure_response(
+			array(
+				'message'   => __( 'Your report file is being generated.', 'woocommerce' ),
+				'export_id' => $export_id,
+			)
+		);
+
+		// Include a link to the export status endpoint.
+		$response->add_links(
+			array(
+				'status' => array(
+					'href' => rest_url( sprintf( '%s/reports/%s/export/%s/status', $this->namespace, $report_type, $export_id ) ),
+				),
+			)
+		);
+
+		$data = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Export status based on user request params.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function export_status( $request ) {
+		$report_type = $request['type'];
+		$export_id   = $request['export_id'];
+		$percentage  = ReportExporter::get_export_percentage_complete( $report_type, $export_id );
+
+		if ( false === $percentage ) {
+			return new \WP_Error(
+				'woocommerce_admin_reports_export_invalid_id',
+				__( 'Sorry, there is no export with that ID.', 'woocommerce' ),
+				array( 'status' => 404 )
+			);
+		}
+
+		$result = array(
+			'percent_complete' => $percentage,
+		);
+
+		// @todo - add thing in the links below instead?
+		if ( 100 === $percentage ) {
+			$query_args = array(
+				'action'   => ReportExporter::DOWNLOAD_EXPORT_ACTION,
+				'filename' => "wc-{$report_type}-report-export-{$export_id}",
+			);
+
+			$result['download_url'] = add_query_arg( $query_args, admin_url() );
+		}
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $result );
+		// Include a link to the export status endpoint.
+		$response->add_links(
+			array(
+				'self' => array(
+					'href' => rest_url( sprintf( '%s/reports/%s/export/%s/status', $this->namespace, $report_type, $export_id ) ),
+				),
+			)
+		);
+
+		$data = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+}

packages/woocommerce-admin/src/API/Reports/ExportableInterface.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Reports Exportable Controller Interface
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * WooCommerce Reports exportable controller interface.
+ *
+ * @since 3.5.0
+ */
+interface ExportableInterface {
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns();
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Value.
+	 */
+	public function prepare_item_for_export( $item );
+}

packages/woocommerce-admin/src/API/Reports/ExportableTraits.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * REST API Reports exportable traits
+ *
+ * Collection of utility methods for exportable reports.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * ExportableTraits class.
+ */
+trait ExportableTraits {
+	/**
+	 * Format numbers for CSV using store precision setting.
+	 *
+	 * @param string|float $value Numeric value.
+	 * @return string Formatted value.
+	 */
+	public static function csv_number_format( $value ) {
+		$decimals = wc_get_price_decimals();
+		// See: @woocommerce/currency: getCurrencyFormatDecimal().
+		return number_format( $value, $decimals, '.', '' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Import/Controller.php

@@ -0,0 +1,308 @@
+<?php
+/**
+ * REST API Reports Import Controller
+ *
+ * Handles requests to /reports/import
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Import;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\ReportsSync;
+
+/**
+ * Reports Imports controller.
+ *
+ * @extends \Automattic\WooCommerce\Admin\API\Reports\Controller
+ */
+class Controller extends \Automattic\WooCommerce\Admin\API\Reports\Controller {
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/import';
+
+	/**
+	 * Register routes.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'import_items' ),
+					'permission_callback' => array( $this, 'import_permissions_check' ),
+					'args'                => $this->get_import_collection_params(),
+				),
+				'schema' => array( $this, 'get_import_public_schema' ),
+			)
+		);
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/cancel',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'cancel_import' ),
+					'permission_callback' => array( $this, 'import_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_import_public_schema' ),
+			)
+		);
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/delete',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::EDITABLE,
+					'callback'            => array( $this, 'delete_imported_items' ),
+					'permission_callback' => array( $this, 'import_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_import_public_schema' ),
+			)
+		);
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/status',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_import_status' ),
+					'permission_callback' => array( $this, 'import_permissions_check' ),
+				),
+				'schema' => array( $this, 'get_import_public_schema' ),
+			)
+		);
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/totals',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_import_totals' ),
+					'permission_callback' => array( $this, 'import_permissions_check' ),
+					'args'                => $this->get_import_collection_params(),
+				),
+				'schema' => array( $this, 'get_import_public_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Makes sure the current user has access to WRITE the settings APIs.
+	 *
+	 * @param WP_REST_Request $request Full data about the request.
+	 * @return WP_Error|bool
+	 */
+	public function import_permissions_check( $request ) {
+		if ( ! wc_rest_check_manager_permissions( 'settings', 'edit' ) ) {
+			return new \WP_Error( 'woocommerce_rest_cannot_edit', __( 'Sorry, you cannot edit this resource.', 'woocommerce' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+		return true;
+	}
+
+	/**
+	 * Import data based on user request params.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function import_items( $request ) {
+		$query_args = $this->prepare_objects_query( $request );
+		$import     = ReportsSync::regenerate_report_data( $query_args['days'], $query_args['skip_existing'] );
+
+		if ( is_wp_error( $import ) ) {
+			$result = array(
+				'status'  => 'error',
+				'message' => $import->get_error_message(),
+			);
+		} else {
+			$result = array(
+				'status'  => 'success',
+				'message' => $import,
+			);
+		}
+
+		$response = $this->prepare_item_for_response( $result, $request );
+		$data     = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Prepare request object as query args.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array
+	 */
+	protected function prepare_objects_query( $request ) {
+		$args                  = array();
+		$args['skip_existing'] = $request['skip_existing'];
+		$args['days']          = $request['days'];
+
+		return $args;
+	}
+
+	/**
+	 * Prepare the data object for response.
+	 *
+	 * @param object          $item Data object.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response $response Response data.
+	 */
+	public function prepare_item_for_response( $item, $request ) {
+		$data     = $this->add_additional_fields_to_object( $item, $request );
+		$data     = $this->filter_response_by_context( $data, 'view' );
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter the list returned from the API.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param array            $item     The original item.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_reports_import', $response, $item, $request );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_import_collection_params() {
+		$params                  = array();
+		$params['days']          = array(
+			'description'       => __( 'Number of days to import.', 'woocommerce' ),
+			'type'              => 'integer',
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 0,
+		);
+		$params['skip_existing'] = array(
+			'description'       => __( 'Skip importing existing order data.', 'woocommerce' ),
+			'type'              => 'boolean',
+			'default'           => false,
+			'sanitize_callback' => 'wc_string_to_bool',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_import_public_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_import',
+			'type'       => 'object',
+			'properties' => array(
+				'status'  => array(
+					'description' => __( 'Regeneration status.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'message' => array(
+					'description' => __( 'Regenerate data message.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Cancel all queued import actions.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function cancel_import( $request ) {
+		ReportsSync::clear_queued_actions();
+
+		$result = array(
+			'status'  => 'success',
+			'message' => __( 'All pending and in-progress import actions have been cancelled.', 'woocommerce' ),
+		);
+
+		$response = $this->prepare_item_for_response( $result, $request );
+		$data     = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Delete all imported items.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function delete_imported_items( $request ) {
+		$delete = ReportsSync::delete_report_data();
+
+		if ( is_wp_error( $delete ) ) {
+			$result = array(
+				'status'  => 'error',
+				'message' => $delete->get_error_message(),
+			);
+		} else {
+			$result = array(
+				'status'  => 'success',
+				'message' => $delete,
+			);
+		}
+
+		$response = $this->prepare_item_for_response( $result, $request );
+		$data     = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Get the status of the current import.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_import_status( $request ) {
+		$result   = ReportsSync::get_import_stats();
+		$response = $this->prepare_item_for_response( $result, $request );
+		$data     = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+
+	/**
+	 * Get the total orders and customers based on user supplied params.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return WP_Error|WP_REST_Response
+	 */
+	public function get_import_totals( $request ) {
+		$query_args = $this->prepare_objects_query( $request );
+		$totals     = ReportsSync::get_import_totals( $query_args['days'], $query_args['skip_existing'] );
+
+		$response = $this->prepare_item_for_response( $totals, $request );
+		$data     = $this->prepare_response_for_collection( $response );
+
+		return rest_ensure_response( $data );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Orders/Controller.php

@@ -0,0 +1,589 @@
+<?php
+/**
+ * REST API Reports orders controller
+ *
+ * Handles requests to the /reports/orders endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Orders;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Controller as ReportsController;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+
+/**
+ * REST API Reports orders controller class.
+ *
+ * @extends \Automattic\WooCommerce\Admin\API\Reports\Controller
+ */
+class Controller extends ReportsController implements ExportableInterface {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/orders';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                       = array();
+		$args['before']             = $request['before'];
+		$args['after']              = $request['after'];
+		$args['page']               = $request['page'];
+		$args['per_page']           = $request['per_page'];
+		$args['orderby']            = $request['orderby'];
+		$args['order']              = $request['order'];
+		$args['product_includes']   = (array) $request['product_includes'];
+		$args['product_excludes']   = (array) $request['product_excludes'];
+		$args['variation_includes'] = (array) $request['variation_includes'];
+		$args['variation_excludes'] = (array) $request['variation_excludes'];
+		$args['coupon_includes']    = (array) $request['coupon_includes'];
+		$args['coupon_excludes']    = (array) $request['coupon_excludes'];
+		$args['tax_rate_includes']  = (array) $request['tax_rate_includes'];
+		$args['tax_rate_excludes']  = (array) $request['tax_rate_excludes'];
+		$args['status_is']          = (array) $request['status_is'];
+		$args['status_is_not']      = (array) $request['status_is_not'];
+		$args['customer_type']      = $request['customer_type'];
+		$args['extended_info']      = $request['extended_info'];
+		$args['refunds']            = $request['refunds'];
+		$args['match']              = $request['match'];
+		$args['order_includes']     = $request['order_includes'];
+		$args['order_excludes']     = $request['order_excludes'];
+		$args['attribute_is']       = (array) $request['attribute_is'];
+		$args['attribute_is_not']   = (array) $request['attribute_is_not'];
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args   = $this->prepare_reports_query( $request );
+		$orders_query = new Query( $query_args );
+		$report_data  = $orders_query->get_data();
+
+		$data = array();
+
+		foreach ( $report_data->data as $orders_data ) {
+			$orders_data['order_number']    = $this->get_order_number( $orders_data['order_id'] );
+			$orders_data['total_formatted'] = $this->get_total_formatted( $orders_data['order_id'] );
+			$item                           = $this->prepare_item_for_response( $orders_data, $request );
+			$data[]                         = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $report ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_orders', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param WC_Reports_Query $object Object data.
+	 * @return array
+	 */
+	protected function prepare_links( $object ) {
+		$links = array(
+			'order' => array(
+				'href' => rest_url( sprintf( '/%s/orders/%d', $this->namespace, $object['order_id'] ) ),
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_orders',
+			'type'       => 'object',
+			'properties' => array(
+				'order_id'         => array(
+					'description' => __( 'Order ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'order_number'     => array(
+					'description' => __( 'Order Number.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_created'     => array(
+					'description' => __( "Date the order was created, in the site's timezone.", 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'date_created_gmt' => array(
+					'description' => __( 'Date the order was created, as GMT.', 'woocommerce' ),
+					'type'        => 'date-time',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'status'           => array(
+					'description' => __( 'Order status.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'customer_id'      => array(
+					'description' => __( 'Customer ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'num_items_sold'   => array(
+					'description' => __( 'Number of items sold.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'net_total'        => array(
+					'description' => __( 'Net total revenue.', 'woocommerce' ),
+					'type'        => 'float',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'total_formatted'  => array(
+					'description' => __( 'Net total revenue (formatted).', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'customer_type'    => array(
+					'description' => __( 'Returning or new customer.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'extended_info'    => array(
+					'products' => array(
+						'type'        => 'array',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'List of order product IDs, names, quantities.', 'woocommerce' ),
+					),
+					'coupons'  => array(
+						'type'        => 'array',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'List of order coupons.', 'woocommerce' ),
+					),
+					'customer' => array(
+						'type'        => 'object',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Order customer information.', 'woocommerce' ),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                       = array();
+		$params['context']            = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']               = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']           = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 0,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']              = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']             = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']              = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']            = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'num_items_sold',
+				'net_total',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_includes']   = array(
+			'description'       => __( 'Limit result set to items that have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_excludes']   = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['variation_includes'] = array(
+			'description'       => __( 'Limit result set to items that have the specified variation(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['variation_excludes'] = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified variation(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['coupon_includes']    = array(
+			'description'       => __( 'Limit result set to items that have the specified coupon(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['coupon_excludes']    = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified coupon(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['tax_rate_includes']  = array(
+			'description'       => __( 'Limit result set to items that have the specified tax rate(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['tax_rate_excludes']  = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified tax rate(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['status_is']          = array(
+			'description'       => __( 'Limit result set to items that have the specified order status.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'enum' => self::get_order_statuses(),
+				'type' => 'string',
+			),
+		);
+		$params['status_is_not']      = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified order status.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'enum' => self::get_order_statuses(),
+				'type' => 'string',
+			),
+		);
+		$params['customer_type']      = array(
+			'description'       => __( 'Limit result set to returning or new customers.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => '',
+			'enum'              => array(
+				'',
+				'returning',
+				'new',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['refunds']            = array(
+			'description'       => __( 'Limit result set to specific types of refunds.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => '',
+			'enum'              => array(
+				'',
+				'all',
+				'partial',
+				'full',
+				'none',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['extended_info']      = array(
+			'description'       => __( 'Add additional piece of info about each coupon to the report.', 'woocommerce' ),
+			'type'              => 'boolean',
+			'default'           => false,
+			'sanitize_callback' => 'wc_string_to_bool',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order_includes']     = array(
+			'description'       => __( 'Limit result set to items that have the specified order ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['order_excludes']     = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified order ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['attribute_is']       = array(
+			'description'       => __( 'Limit result set to orders that include products with the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['attribute_is_not']   = array(
+			'description'       => __( 'Limit result set to orders that don\'t include products with the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get customer name column export value.
+	 *
+	 * @param array $customer Customer from report row.
+	 * @return string
+	 */
+	protected function get_customer_name( $customer ) {
+		return $customer['first_name'] . ' ' . $customer['last_name'];
+	}
+
+	/**
+	 * Get products column export value.
+	 *
+	 * @param array $products Products from report row.
+	 * @return string
+	 */
+	protected function _get_products( $products ) {
+		$products_list = array();
+
+		foreach ( $products as $product ) {
+			$products_list[] = sprintf(
+				/* translators: 1: numeric product quantity, 2: name of product */
+				__( '%1$s× %2$s', 'woocommerce' ),
+				$product['quantity'],
+				$product['name']
+			);
+		}
+
+		return implode( ', ', $products_list );
+	}
+
+	/**
+	 * Get coupons column export value.
+	 *
+	 * @param array $coupons Coupons from report row.
+	 * @return string
+	 */
+	protected function _get_coupons( $coupons ) {
+		return implode( ', ', wp_list_pluck( $coupons, 'code' ) );
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'date_created'    => __( 'Date', 'woocommerce' ),
+			'order_number'    => __( 'Order #', 'woocommerce' ),
+			'total_formatted' => __( 'N. Revenue (formatted)', 'woocommerce' ),
+			'status'          => __( 'Status', 'woocommerce' ),
+			'customer_name'   => __( 'Customer', 'woocommerce' ),
+			'customer_type'   => __( 'Customer type', 'woocommerce' ),
+			'products'        => __( 'Product(s)', 'woocommerce' ),
+			'num_items_sold'  => __( 'Items sold', 'woocommerce' ),
+			'coupons'         => __( 'Coupon(s)', 'woocommerce' ),
+			'net_total'       => __( 'N. Revenue', 'woocommerce' ),
+		);
+
+		/**
+		 * Filter to add or remove column names from the orders report for
+		 * export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_orders_export_columns',
+			$export_columns
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$export_item = array(
+			'date_created'    => $item['date_created'],
+			'order_number'    => $item['order_number'],
+			'total_formatted' => $item['total_formatted'],
+			'status'          => $item['status'],
+			'customer_name'   => isset( $item['extended_info']['customer'] ) ? $this->get_customer_name( $item['extended_info']['customer'] ) : null,
+			'customer_type'   => $item['customer_type'],
+			'products'        => isset( $item['extended_info']['products'] ) ? $this->_get_products( $item['extended_info']['products'] ) : null,
+			'num_items_sold'  => $item['num_items_sold'],
+			'coupons'         => isset( $item['extended_info']['coupons'] ) ? $this->_get_coupons( $item['extended_info']['coupons'] ) : null,
+			'net_total'       => $item['net_total'],
+		);
+
+		/**
+		 * Filter to prepare extra columns in the export item for the orders
+		 * report.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_orders_prepare_export_item',
+			$export_item,
+			$item
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Orders/DataStore.php

@@ -0,0 +1,558 @@
+<?php
+/**
+ * API\Reports\Orders\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Orders;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+use \Automattic\WooCommerce\Admin\API\Reports\Cache;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+
+
+/**
+ * API\Reports\Orders\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_stats';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'orders';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'order_id'         => 'intval',
+		'parent_id'        => 'intval',
+		'date_created'     => 'strval',
+		'date_created_gmt' => 'strval',
+		'status'           => 'strval',
+		'customer_id'      => 'intval',
+		'net_total'        => 'floatval',
+		'total_sales'      => 'floatval',
+		'num_items_sold'   => 'intval',
+		'customer_type'    => 'strval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'orders';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name = self::get_db_table_name();
+		// Avoid ambigious columns in SQL query.
+		$this->report_columns = array(
+			'order_id'         => "DISTINCT {$table_name}.order_id",
+			'parent_id'        => "{$table_name}.parent_id",
+			'date_created'     => "{$table_name}.date_created",
+			'date_created_gmt' => "{$table_name}.date_created_gmt",
+			'status'           => "REPLACE({$table_name}.status, 'wc-', '') as status",
+			'customer_id'      => "{$table_name}.customer_id",
+			'net_total'        => "{$table_name}.net_total",
+			'total_sales'      => "{$table_name}.total_sales",
+			'num_items_sold'   => "{$table_name}.num_items_sold",
+			'customer_type'    => "(CASE WHEN {$table_name}.returning_customer = 0 THEN 'new' ELSE 'returning' END) as customer_type",
+		);
+	}
+
+	/**
+	 * Updates the database query with parameters used for orders report: coupons and products filters.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+		$order_stats_lookup_table   = self::get_db_table_name();
+		$order_coupon_lookup_table  = $wpdb->prefix . 'wc_order_coupon_lookup';
+		$order_product_lookup_table = $wpdb->prefix . 'wc_order_product_lookup';
+		$order_tax_lookup_table     = $wpdb->prefix . 'wc_order_tax_lookup';
+		$operator                   = $this->get_match_operator( $query_args );
+		$where_subquery             = array();
+		$have_joined_products_table = false;
+
+		$this->add_time_period_sql_params( $query_args, $order_stats_lookup_table );
+		$this->get_limit_sql_params( $query_args );
+		$this->add_order_by_sql_params( $query_args );
+
+		$status_subquery = $this->get_status_subquery( $query_args );
+		if ( $status_subquery ) {
+			if ( empty( $query_args['status_is'] ) && empty( $query_args['status_is_not'] ) ) {
+				$this->subquery->add_sql_clause( 'where', "AND {$status_subquery}" );
+			} else {
+				$where_subquery[] = $status_subquery;
+			}
+		}
+
+		$included_orders = $this->get_included_orders( $query_args );
+		if ( $included_orders ) {
+			$where_subquery[] = "{$order_stats_lookup_table}.order_id IN ({$included_orders})";
+		}
+
+		$excluded_orders = $this->get_excluded_orders( $query_args );
+		if ( $excluded_orders ) {
+			$where_subquery[] = "{$order_stats_lookup_table}.order_id NOT IN ({$excluded_orders})";
+		}
+
+		if ( $query_args['customer_type'] ) {
+			$returning_customer = 'returning' === $query_args['customer_type'] ? 1 : 0;
+			$where_subquery[]   = "{$order_stats_lookup_table}.returning_customer = ${returning_customer}";
+		}
+
+		$refund_subquery = $this->get_refund_subquery( $query_args );
+		$this->subquery->add_sql_clause( 'from', $refund_subquery['from_clause'] );
+		if ( $refund_subquery['where_clause'] ) {
+			$where_subquery[] = $refund_subquery['where_clause'];
+		}
+
+		$included_coupons = $this->get_included_coupons( $query_args );
+		$excluded_coupons = $this->get_excluded_coupons( $query_args );
+		if ( $included_coupons || $excluded_coupons ) {
+			$this->subquery->add_sql_clause( 'join', "LEFT JOIN {$order_coupon_lookup_table} ON {$order_stats_lookup_table}.order_id = {$order_coupon_lookup_table}.order_id" );
+		}
+		if ( $included_coupons ) {
+			$where_subquery[] = "{$order_coupon_lookup_table}.coupon_id IN ({$included_coupons})";
+		}
+		if ( $excluded_coupons ) {
+			$where_subquery[] = "({$order_coupon_lookup_table}.coupon_id IS NULL OR {$order_coupon_lookup_table}.coupon_id NOT IN ({$excluded_coupons}))";
+		}
+
+		$included_products = $this->get_included_products( $query_args );
+		$excluded_products = $this->get_excluded_products( $query_args );
+		if ( $included_products || $excluded_products ) {
+			$this->subquery->add_sql_clause( 'join', "LEFT JOIN {$order_product_lookup_table} product_lookup" );
+			$this->subquery->add_sql_clause( 'join', "ON {$order_stats_lookup_table}.order_id = product_lookup.order_id" );
+		}
+		if ( $included_products ) {
+			$this->subquery->add_sql_clause( 'join', "AND product_lookup.product_id IN ({$included_products})" );
+			$where_subquery[] = 'product_lookup.order_id IS NOT NULL';
+		}
+		if ( $excluded_products ) {
+			$this->subquery->add_sql_clause( 'join', "AND product_lookup.product_id IN ({$excluded_products})" );
+			$where_subquery[] = 'product_lookup.order_id IS NULL';
+		}
+
+		$included_variations = $this->get_included_variations( $query_args );
+		$excluded_variations = $this->get_excluded_variations( $query_args );
+		if ( $included_variations || $excluded_variations ) {
+			$this->subquery->add_sql_clause( 'join', "LEFT JOIN {$order_product_lookup_table} variation_lookup" );
+			$this->subquery->add_sql_clause( 'join', "ON {$order_stats_lookup_table}.order_id = variation_lookup.order_id" );
+		}
+		if ( $included_variations ) {
+			$this->subquery->add_sql_clause( 'join', "AND variation_lookup.variation_id IN ({$included_variations})" );
+			$where_subquery[] = 'variation_lookup.order_id IS NOT NULL';
+		}
+		if ( $excluded_variations ) {
+			$this->subquery->add_sql_clause( 'join', "AND variation_lookup.variation_id IN ({$excluded_variations})" );
+			$where_subquery[] = 'variation_lookup.order_id IS NULL';
+		}
+
+		$included_tax_rates = ! empty( $query_args['tax_rate_includes'] ) ? implode( ',', $query_args['tax_rate_includes'] ) : false;
+		$excluded_tax_rates = ! empty( $query_args['tax_rate_excludes'] ) ? implode( ',', $query_args['tax_rate_excludes'] ) : false;
+		if ( $included_tax_rates || $excluded_tax_rates ) {
+			$this->subquery->add_sql_clause( 'join', "LEFT JOIN {$order_tax_lookup_table} ON {$order_stats_lookup_table}.order_id = {$order_tax_lookup_table}.order_id" );
+		}
+		if ( $included_tax_rates ) {
+			$where_subquery[] = "{$order_tax_lookup_table}.tax_rate_id IN ({$included_tax_rates})";
+		}
+		if ( $excluded_tax_rates ) {
+			$where_subquery[] = "{$order_tax_lookup_table}.tax_rate_id NOT IN ({$excluded_tax_rates}) OR {$order_tax_lookup_table}.tax_rate_id IS NULL";
+		}
+
+		$attribute_subqueries = $this->get_attribute_subqueries( $query_args, $order_stats_lookup_table );
+		if ( $attribute_subqueries['join'] && $attribute_subqueries['where'] ) {
+			$this->subquery->add_sql_clause( 'join', "JOIN {$order_product_lookup_table} ON {$order_stats_lookup_table}.order_id = {$order_product_lookup_table}.order_id" );
+
+			// Add JOINs for matching attributes.
+			foreach ( $attribute_subqueries['join'] as $attribute_join ) {
+				$this->subquery->add_sql_clause( 'join', $attribute_join );
+			}
+			// Add WHEREs for matching attributes.
+			$where_subquery = array_merge( $where_subquery, $attribute_subqueries['where'] );
+		}
+
+		if ( 0 < count( $where_subquery ) ) {
+			$this->subquery->add_sql_clause( 'where', 'AND (' . implode( " {$operator} ", $where_subquery ) . ')' );
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'          => get_option( 'posts_per_page' ),
+			'page'              => 1,
+			'order'             => 'DESC',
+			'orderby'           => 'date_created',
+			'before'            => TimeInterval::default_before(),
+			'after'             => TimeInterval::default_after(),
+			'fields'            => '*',
+			'product_includes'  => array(),
+			'product_excludes'  => array(),
+			'coupon_includes'   => array(),
+			'coupon_excludes'   => array(),
+			'tax_rate_includes' => array(),
+			'tax_rate_excludes' => array(),
+			'customer_type'     => null,
+			'status_is'         => array(),
+			'extended_info'     => false,
+			'refunds'           => null,
+			'order_includes'    => array(),
+			'order_excludes'    => array(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$selections = $this->selected_columns( $query_args );
+			$params     = $this->get_limit_params( $query_args );
+			$this->add_sql_query_params( $query_args );
+			/* phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared */
+			$db_records_count = (int) $wpdb->get_var(
+				"SELECT COUNT(*) FROM (
+					{$this->subquery->get_query_statement()}
+				) AS tt"
+			);
+			/* phpcs:enable */
+
+			if ( 0 === $params['per_page'] ) {
+				$total_pages = 0;
+			} else {
+				$total_pages = (int) ceil( $db_records_count / $params['per_page'] );
+			}
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				$data = (object) array(
+					'data'    => array(),
+					'total'   => $db_records_count,
+					'pages'   => 0,
+					'page_no' => 0,
+				);
+				return $data;
+			}
+
+			$this->subquery->clear_sql_clause( 'select' );
+			$this->subquery->add_sql_clause( 'select', $selections );
+			$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->subquery->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+			/* phpcs:disable WordPress.DB.PreparedSQL.NotPrepared */
+			$orders_data = $wpdb->get_results(
+				$this->subquery->get_query_statement(),
+				ARRAY_A
+			);
+			/* phpcs:enable */
+
+			if ( null === $orders_data ) {
+				return $data;
+			}
+
+			if ( $query_args['extended_info'] ) {
+				$this->include_extended_info( $orders_data, $query_args );
+			}
+
+			$orders_data = array_map( array( $this, 'cast_numbers' ), $orders_data );
+			$data        = (object) array(
+				'data'    => $orders_data,
+				'total'   => $db_records_count,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+		return $data;
+	}
+
+	/**
+	 * Normalizes order_by clause to match to SQL query.
+	 *
+	 * @param string $order_by Order by option requeste by user.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return 'date_created';
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Enriches the order data.
+	 *
+	 * @param array $orders_data Orders data.
+	 * @param array $query_args  Query parameters.
+	 */
+	protected function include_extended_info( &$orders_data, $query_args ) {
+		$mapped_orders    = $this->map_array_by_key( $orders_data, 'order_id' );
+		$related_orders   = $this->get_orders_with_parent_id( $mapped_orders );
+		$order_ids        = array_merge( array_keys( $mapped_orders ), array_keys( $related_orders ) );
+		$products         = $this->get_products_by_order_ids( $order_ids );
+		$coupons          = $this->get_coupons_by_order_ids( array_keys( $mapped_orders ) );
+		$customers        = $this->get_customers_by_orders( $orders_data );
+		$mapped_customers = $this->map_array_by_key( $customers, 'customer_id' );
+
+		$mapped_data = array();
+		foreach ( $products as $product ) {
+			if ( ! isset( $mapped_data[ $product['order_id'] ] ) ) {
+				$mapped_data[ $product['order_id'] ]['products'] = array();
+			}
+
+			$is_variation = '0' !== $product['variation_id'];
+			$product_data = array(
+				'id'       => $is_variation ? $product['variation_id'] : $product['product_id'],
+				'name'     => $product['product_name'],
+				'quantity' => $product['product_quantity'],
+			);
+
+			if ( $is_variation ) {
+				$variation = wc_get_product( $product_data['id'] );
+				$separator = apply_filters( 'woocommerce_product_variation_title_attributes_separator', ' - ', $variation );
+
+				if ( false === strpos( $product_data['name'], $separator ) ) {
+					$attributes            = wc_get_formatted_variation( $variation, true, false );
+					$product_data['name'] .= $separator . $attributes;
+				}
+			}
+
+			$mapped_data[ $product['order_id'] ]['products'][] = $product_data;
+
+			// If this product's order has another related order, it will be added to our mapped_data.
+			if ( isset( $related_orders [ $product['order_id'] ] ) ) {
+				$mapped_data[ $related_orders[ $product['order_id'] ]['order_id'] ] ['products'] [] = $product_data;
+			}
+		}
+
+		foreach ( $coupons as $coupon ) {
+			if ( ! isset( $mapped_data[ $coupon['order_id'] ] ) ) {
+				$mapped_data[ $product['order_id'] ]['coupons'] = array();
+			}
+
+			$mapped_data[ $coupon['order_id'] ]['coupons'][] = array(
+				'id'   => $coupon['coupon_id'],
+				'code' => wc_format_coupon_code( $coupon['coupon_code'] ),
+			);
+		}
+
+		foreach ( $orders_data as $key => $order_data ) {
+			$defaults                             = array(
+				'products' => array(),
+				'coupons'  => array(),
+				'customer' => array(),
+			);
+			$orders_data[ $key ]['extended_info'] = isset( $mapped_data[ $order_data['order_id'] ] ) ? array_merge( $defaults, $mapped_data[ $order_data['order_id'] ] ) : $defaults;
+			if ( $order_data['customer_id'] && isset( $mapped_customers[ $order_data['customer_id'] ] ) ) {
+				$orders_data[ $key ]['extended_info']['customer'] = $mapped_customers[ $order_data['customer_id'] ];
+			}
+		}
+	}
+
+	/**
+	 * Returns oreders that have a parent id
+	 *
+	 * @param array $orders Orders array.
+	 * @return array
+	 */
+	protected function get_orders_with_parent_id( $orders ) {
+		$related_orders = array();
+		foreach ( $orders as $order ) {
+			if ( '0' !== $order['parent_id'] ) {
+				$related_orders[ $order['parent_id'] ] = $order;
+			}
+		}
+		return $related_orders;
+	}
+
+	/**
+	 * Returns the same array index by a given key
+	 *
+	 * @param array  $array Array to be looped over.
+	 * @param string $key Key of values used for new array.
+	 * @return array
+	 */
+	protected function map_array_by_key( $array, $key ) {
+		$mapped = array();
+		foreach ( $array as $item ) {
+			$mapped[ $item[ $key ] ] = $item;
+		}
+		return $mapped;
+	}
+
+	/**
+	 * Get product IDs, names, and quantity from order IDs.
+	 *
+	 * @param array $order_ids Array of order IDs.
+	 * @return array
+	 */
+	protected function get_products_by_order_ids( $order_ids ) {
+		global $wpdb;
+		$order_product_lookup_table = $wpdb->prefix . 'wc_order_product_lookup';
+		$included_order_ids         = implode( ',', $order_ids );
+
+		/* phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared */
+		$products = $wpdb->get_results(
+			"SELECT
+				order_id,
+				product_id,
+				variation_id,
+				post_title as product_name,
+				product_qty as product_quantity
+			FROM {$wpdb->posts}
+			JOIN
+				{$order_product_lookup_table}
+				ON {$wpdb->posts}.ID = (
+					CASE WHEN variation_id > 0
+						THEN variation_id
+						ELSE product_id
+					END
+				)
+			WHERE
+				order_id IN ({$included_order_ids})
+			",
+			ARRAY_A
+		);
+		/* phpcs:enable */
+
+		return $products;
+	}
+
+	/**
+	 * Get customer data from Order data.
+	 *
+	 * @param array $orders Array of orders data.
+	 * @return array
+	 */
+	protected function get_customers_by_orders( $orders ) {
+		global $wpdb;
+
+		$customer_lookup_table = $wpdb->prefix . 'wc_customer_lookup';
+		$customer_ids          = array();
+
+		foreach ( $orders as $order ) {
+			if ( $order['customer_id'] ) {
+				$customer_ids[] = intval( $order['customer_id'] );
+			}
+		}
+
+		if ( empty( $customer_ids ) ) {
+			return array();
+		}
+
+		/* phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared */
+		$customer_ids = implode( ',', $customer_ids );
+		$customers    = $wpdb->get_results(
+			"SELECT * FROM {$customer_lookup_table} WHERE customer_id IN ({$customer_ids})",
+			ARRAY_A
+		);
+		/* phpcs:enable */
+
+		return $customers;
+	}
+
+	/**
+	 * Get coupon information from order IDs.
+	 *
+	 * @param array $order_ids Array of order IDs.
+	 * @return array
+	 */
+	protected function get_coupons_by_order_ids( $order_ids ) {
+		global $wpdb;
+		$order_coupon_lookup_table = $wpdb->prefix . 'wc_order_coupon_lookup';
+		$included_order_ids        = implode( ',', $order_ids );
+
+		/* phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared */
+		$coupons = $wpdb->get_results(
+			"SELECT order_id, coupon_id, post_title as coupon_code
+				FROM {$wpdb->posts}
+				JOIN {$order_coupon_lookup_table} ON {$order_coupon_lookup_table}.coupon_id = {$wpdb->posts}.ID
+				WHERE
+					order_id IN ({$included_order_ids})
+				",
+			ARRAY_A
+		);
+		/* phpcs:enable */
+
+		return $coupons;
+	}
+
+	/**
+	 * Get all statuses that have been synced.
+	 *
+	 * @return array Unique order statuses.
+	 */
+	public static function get_all_statuses() {
+		global $wpdb;
+
+		$cache_key = 'orders-all-statuses';
+		$statuses  = Cache::get( $cache_key );
+
+		if ( false === $statuses ) {
+			/* phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared */
+			$table_name = self::get_db_table_name();
+			$statuses   = $wpdb->get_col(
+				"SELECT DISTINCT status FROM {$table_name}"
+			);
+			/* phpcs:enable */
+
+			Cache::set( $cache_key, $statuses );
+		}
+
+		return $statuses;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'select', self::get_db_table_name() . '.order_id' );
+		$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Orders/Query.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * Class for parameter-based Orders Reports querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'        => '2018-07-19 00:00:00',
+ *          'after'         => '2018-07-05 00:00:00',
+ *          'interval'      => 'week',
+ *          'products'      => array(15, 18),
+ *          'coupons'       => array(138),
+ *          'status_is'     => array('completed'),
+ *          'status_is_not' => array('failed'),
+ *          'new_customers' => false,
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Orders\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Orders;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Orders\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Get order data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args       = apply_filters( 'woocommerce_analytics_orders_query_args', $this->get_query_vars() );
+		$data_store = \WC_Data_Store::load( 'report-orders' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_orders_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Orders/Stats/Controller.php

@@ -0,0 +1,575 @@
+<?php
+/**
+ * REST API Reports orders stats controller
+ *
+ * Handles requests to the /reports/orders/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Orders\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * REST API Reports orders stats controller class.
+ *
+ * @extends \Automattic\WooCommerce\Admin\API\Reports\Controller
+ */
+class Controller extends \Automattic\WooCommerce\Admin\API\Reports\Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/orders/stats';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                       = array();
+		$args['before']             = $request['before'];
+		$args['after']              = $request['after'];
+		$args['interval']           = $request['interval'];
+		$args['page']               = $request['page'];
+		$args['per_page']           = $request['per_page'];
+		$args['orderby']            = $request['orderby'];
+		$args['order']              = $request['order'];
+		$args['fields']             = $request['fields'];
+		$args['match']              = $request['match'];
+		$args['status_is']          = (array) $request['status_is'];
+		$args['status_is_not']      = (array) $request['status_is_not'];
+		$args['product_includes']   = (array) $request['product_includes'];
+		$args['product_excludes']   = (array) $request['product_excludes'];
+		$args['variation_includes'] = (array) $request['variation_includes'];
+		$args['variation_excludes'] = (array) $request['variation_excludes'];
+		$args['coupon_includes']    = (array) $request['coupon_includes'];
+		$args['coupon_excludes']    = (array) $request['coupon_excludes'];
+		$args['tax_rate_includes']  = (array) $request['tax_rate_includes'];
+		$args['tax_rate_excludes']  = (array) $request['tax_rate_excludes'];
+		$args['customer_type']      = $request['customer_type'];
+		$args['refunds']            = $request['refunds'];
+		$args['attribute_is']       = (array) $request['attribute_is'];
+		$args['attribute_is_not']   = (array) $request['attribute_is_not'];
+		$args['category_includes']  = (array) $request['categories'];
+		$args['segmentby']          = $request['segmentby'];
+
+		// For backwards compatibility, `customer` is aliased to `customer_type`.
+		if ( empty( $request['customer_type'] ) && ! empty( $request['customer'] ) ) {
+			$args['customer_type'] = $request['customer'];
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args   = $this->prepare_reports_query( $request );
+		$orders_query = new Query( $query_args );
+		try {
+			$report_data = $orders_query->get_data();
+		} catch ( ParameterException $e ) {
+			return new \WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
+		}
+
+		$out_data = array(
+			'totals'    => get_object_vars( $report_data->totals ),
+			'intervals' => array(),
+		);
+
+		foreach ( $report_data->intervals as $interval_data ) {
+			$item                    = $this->prepare_item_for_response( $interval_data, $request );
+			$out_data['intervals'][] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_orders_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$data_values = array(
+			'net_revenue'         => array(
+				'description' => __( 'Net sales.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'format'      => 'currency',
+			),
+			'orders_count'        => array(
+				'title'       => __( 'Orders', 'woocommerce' ),
+				'description' => __( 'Number of orders', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+			),
+			'avg_order_value'     => array(
+				'description' => __( 'Average order value.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'avg_items_per_order' => array(
+				'description' => __( 'Average items per order', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'num_items_sold'      => array(
+				'description' => __( 'Number of items sold', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'coupons'             => array(
+				'description' => __( 'Amount discounted by coupons.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'coupons_count'       => array(
+				'description' => __( 'Unique coupons count.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'total_customers'     => array(
+				'description' => __( 'Total distinct customers.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'products'            => array(
+				'description' => __( 'Number of distinct products sold.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+		);
+
+		$segments = array(
+			'segments' => array(
+				'description' => __( 'Reports data grouped by segment condition.', 'woocommerce' ),
+				'type'        => 'array',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'items'       => array(
+					'type'       => 'object',
+					'properties' => array(
+						'segment_id' => array(
+							'description' => __( 'Segment identificator.', 'woocommerce' ),
+							'type'        => 'integer',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+						),
+						'subtotals'  => array(
+							'description' => __( 'Interval subtotals.', 'woocommerce' ),
+							'type'        => 'object',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'properties'  => $data_values,
+						),
+					),
+				),
+			),
+		);
+
+		$totals = array_merge( $data_values, $segments );
+
+		// Products is not shown in intervals.
+		unset( $data_values['products'] );
+
+		$intervals = array_merge( $data_values, $segments );
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_orders_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals'    => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+				'intervals' => array(
+					'description' => __( 'Reports data grouped by intervals.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'object',
+						'properties' => array(
+							'interval'       => array(
+								'description' => __( 'Type of interval.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'enum'        => array( 'day', 'week', 'month', 'year' ),
+							),
+							'date_start'     => array(
+								'description' => __( "The date the report start, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_start_gmt' => array(
+								'description' => __( 'The date the report start, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end'       => array(
+								'description' => __( "The date the report end, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end_gmt'   => array(
+								'description' => __( 'The date the report end, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'subtotals'      => array(
+								'description' => __( 'Interval subtotals.', 'woocommerce' ),
+								'type'        => 'object',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'properties'  => $intervals,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                     = array();
+		$params['context']          = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']             = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']         = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']            = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']           = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']            = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']          = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'net_revenue',
+				'orders_count',
+				'avg_order_value',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']         = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['match']            = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: status_is, status_is_not, product_includes, product_excludes, coupon_includes, coupon_excludes, customer, categories', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['status_is']        = array(
+			'description'       => __( 'Limit result set to items that have the specified order status.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'default'           => null,
+			'items'             => array(
+				'enum' => self::get_order_statuses(),
+				'type' => 'string',
+			),
+		);
+		$params['status_is_not']    = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified order status.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'enum' => self::get_order_statuses(),
+				'type' => 'string',
+			),
+		);
+		$params['product_includes'] = array(
+			'description'       => __( 'Limit result set to items that have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+
+		);
+		$params['product_excludes']   = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified product(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['variation_includes'] = array(
+			'description'       => __( 'Limit result set to items that have the specified variation(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['variation_excludes'] = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified variation(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['coupon_includes']    = array(
+			'description'       => __( 'Limit result set to items that have the specified coupon(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['coupon_excludes']    = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified coupon(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['tax_rate_includes']  = array(
+			'description'       => __( 'Limit result set to items that have the specified tax rate(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['tax_rate_excludes']  = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified tax rate(s) assigned.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['customer']           = array(
+			'description'       => __( 'Alias for customer_type (deprecated).', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'new',
+				'returning',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['customer_type']      = array(
+			'description'       => __( 'Limit result set to orders that have the specified customer_type', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'new',
+				'returning',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['refunds']            = array(
+			'description'       => __( 'Limit result set to specific types of refunds.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => '',
+			'enum'              => array(
+				'',
+				'all',
+				'partial',
+				'full',
+				'none',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['attribute_is']       = array(
+			'description'       => __( 'Limit result set to orders that include products with the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['attribute_is_not']   = array(
+			'description'       => __( 'Limit result set to orders that don\'t include products with the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['segmentby']          = array(
+			'description'       => __( 'Segment the response by additional constraint.', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'product',
+				'category',
+				'variation',
+				'coupon',
+				'customer_type', // new vs returning.
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['fields']             = array(
+			'description'       => __( 'Limit stats fields to the specified items.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Orders/Stats/DataStore.php

@@ -0,0 +1,710 @@
+<?php
+/**
+ * API\Reports\Orders\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Orders\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+use \Automattic\WooCommerce\Admin\API\Reports\Cache as ReportsCache;
+use \Automattic\WooCommerce\Admin\API\Reports\Customers\DataStore as CustomersDataStore;
+
+/**
+ * API\Reports\Orders\Stats\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_stats';
+
+	/**
+	 * Cron event name.
+	 */
+	const CRON_EVENT = 'wc_order_stats_update';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'orders_stats';
+
+	/**
+	 * Type for each column to cast values correctly later.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'orders_count'        => 'intval',
+		'num_items_sold'      => 'intval',
+		'gross_sales'         => 'floatval',
+		'total_sales'         => 'floatval',
+		'coupons'             => 'floatval',
+		'coupons_count'       => 'intval',
+		'refunds'             => 'floatval',
+		'taxes'               => 'floatval',
+		'shipping'            => 'floatval',
+		'net_revenue'         => 'floatval',
+		'avg_items_per_order' => 'floatval',
+		'avg_order_value'     => 'floatval',
+		'total_customers'     => 'intval',
+		'products'            => 'intval',
+		'segment_id'          => 'intval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'orders_stats';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name = self::get_db_table_name();
+		// Avoid ambigious columns in SQL query.
+		$refunds     = "ABS( SUM( CASE WHEN {$table_name}.net_total < 0 THEN {$table_name}.net_total ELSE 0 END ) )";
+		$gross_sales =
+			"( SUM({$table_name}.total_sales)" .
+			' + COALESCE( SUM(discount_amount), 0 )' . // SUM() all nulls gives null.
+			" - SUM({$table_name}.tax_total)" .
+			" - SUM({$table_name}.shipping_total)" .
+			" + {$refunds}" .
+			' ) as gross_sales';
+
+		$this->report_columns = array(
+			'orders_count'        => "SUM( CASE WHEN {$table_name}.parent_id = 0 THEN 1 ELSE 0 END ) as orders_count",
+			'num_items_sold'      => "SUM({$table_name}.num_items_sold) as num_items_sold",
+			'gross_sales'         => $gross_sales,
+			'total_sales'         => "SUM({$table_name}.total_sales) AS total_sales",
+			'coupons'             => 'COALESCE( SUM(discount_amount), 0 ) AS coupons', // SUM() all nulls gives null.
+			'coupons_count'       => 'COALESCE( coupons_count, 0 ) as coupons_count',
+			'refunds'             => "{$refunds} AS refunds",
+			'taxes'               => "SUM({$table_name}.tax_total) AS taxes",
+			'shipping'            => "SUM({$table_name}.shipping_total) AS shipping",
+			'net_revenue'         => "SUM({$table_name}.net_total) AS net_revenue",
+			'avg_items_per_order' => "SUM( {$table_name}.num_items_sold ) / SUM( CASE WHEN {$table_name}.parent_id = 0 THEN 1 ELSE 0 END ) AS avg_items_per_order",
+			'avg_order_value'     => "SUM( {$table_name}.net_total ) / SUM( CASE WHEN {$table_name}.parent_id = 0 THEN 1 ELSE 0 END ) AS avg_order_value",
+			'total_customers'     => "COUNT( DISTINCT( {$table_name}.customer_id ) ) as total_customers",
+		);
+	}
+
+	/**
+	 * Set up all the hooks for maintaining and populating table data.
+	 */
+	public static function init() {
+		add_action( 'delete_post', array( __CLASS__, 'delete_order' ) );
+	}
+
+	/**
+	 * Updates the totals and intervals database queries with parameters used for Orders report: categories, coupons and order status.
+	 *
+	 * @param array $query_args      Query arguments supplied by the user.
+	 */
+	protected function orders_stats_sql_filter( $query_args ) {
+		// @todo Performance of all of this?
+		global $wpdb;
+
+		$from_clause        = '';
+		$orders_stats_table = self::get_db_table_name();
+		$product_lookup     = $wpdb->prefix . 'wc_order_product_lookup';
+		$coupon_lookup      = $wpdb->prefix . 'wc_order_coupon_lookup';
+		$tax_rate_lookup    = $wpdb->prefix . 'wc_order_tax_lookup';
+		$operator           = $this->get_match_operator( $query_args );
+
+		$where_filters = array();
+
+		// Products filters.
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$product_lookup,
+			'product_id',
+			'IN',
+			$this->get_included_products( $query_args )
+		);
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$product_lookup,
+			'product_id',
+			'NOT IN',
+			$this->get_excluded_products( $query_args )
+		);
+
+		// Variations filters.
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$product_lookup,
+			'variation_id',
+			'IN',
+			$this->get_included_variations( $query_args )
+		);
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$product_lookup,
+			'variation_id',
+			'NOT IN',
+			$this->get_excluded_variations( $query_args )
+		);
+
+		// Coupons filters.
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$coupon_lookup,
+			'coupon_id',
+			'IN',
+			$this->get_included_coupons( $query_args )
+		);
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$coupon_lookup,
+			'coupon_id',
+			'NOT IN',
+			$this->get_excluded_coupons( $query_args )
+		);
+
+		// Tax rate filters.
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$tax_rate_lookup,
+			'tax_rate_id',
+			'IN',
+			implode( ',', $query_args['tax_rate_includes'] )
+		);
+		$where_filters[] = $this->get_object_where_filter(
+			$orders_stats_table,
+			'order_id',
+			$tax_rate_lookup,
+			'tax_rate_id',
+			'NOT IN',
+			implode( ',', $query_args['tax_rate_excludes'] )
+		);
+
+		// Product attribute filters.
+		$attribute_subqueries = $this->get_attribute_subqueries( $query_args, $orders_stats_table );
+		if ( $attribute_subqueries['join'] && $attribute_subqueries['where'] ) {
+			// Build a subquery for getting order IDs by product attribute(s).
+			// Done here since our use case is a little more complicated than get_object_where_filter() can handle.
+			$attribute_subquery = new SqlQuery();
+			$attribute_subquery->add_sql_clause( 'select', "{$orders_stats_table}.order_id" );
+			$attribute_subquery->add_sql_clause( 'from', $orders_stats_table );
+
+			// JOIN on product lookup.
+			$attribute_subquery->add_sql_clause( 'join', "JOIN {$product_lookup} ON {$orders_stats_table}.order_id = {$product_lookup}.order_id" );
+
+			// Add JOINs for matching attributes.
+			foreach ( $attribute_subqueries['join'] as $attribute_join ) {
+				$attribute_subquery->add_sql_clause( 'join', $attribute_join );
+			}
+			// Add WHEREs for matching attributes.
+			$attribute_subquery->add_sql_clause( 'where', 'AND (' . implode( " {$operator} ", $attribute_subqueries['where'] ) . ')' );
+
+			// Generate subquery statement and add to our where filters.
+			$where_filters[] = "{$orders_stats_table}.order_id IN (" . $attribute_subquery->get_query_statement() . ')';
+		}
+
+		$where_filters[] = $this->get_customer_subquery( $query_args );
+		$refund_subquery = $this->get_refund_subquery( $query_args );
+		$from_clause    .= $refund_subquery['from_clause'];
+		if ( $refund_subquery['where_clause'] ) {
+			$where_filters[] = $refund_subquery['where_clause'];
+		}
+
+		$where_filters   = array_filter( $where_filters );
+		$where_subclause = implode( " $operator ", $where_filters );
+
+		// Append status filter after to avoid matching ANY on default statuses.
+		$order_status_filter = $this->get_status_subquery( $query_args, $operator );
+		if ( $order_status_filter ) {
+			if ( empty( $query_args['status_is'] ) && empty( $query_args['status_is_not'] ) ) {
+				$operator = 'AND';
+			}
+			$where_subclause = implode( " $operator ", array_filter( array( $where_subclause, $order_status_filter ) ) );
+		}
+
+		// To avoid requesting the subqueries twice, the result is applied to all queries passed to the method.
+		if ( $where_subclause ) {
+			$this->total_query->add_sql_clause( 'where', "AND ( $where_subclause )" );
+			$this->total_query->add_sql_clause( 'join', $from_clause );
+			$this->interval_query->add_sql_clause( 'where', "AND ( $where_subclause )" );
+			$this->interval_query->add_sql_clause( 'join', $from_clause );
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only applied when not using REST API, as the API has its own defaults that overwrite these for most values (except before, after, etc).
+		$defaults   = array(
+			'per_page'          => get_option( 'posts_per_page' ),
+			'page'              => 1,
+			'order'             => 'DESC',
+			'orderby'           => 'date',
+			'before'            => TimeInterval::default_before(),
+			'after'             => TimeInterval::default_after(),
+			'interval'          => 'week',
+			'fields'            => '*',
+			'segmentby'         => '',
+
+			'match'             => 'all',
+			'status_is'         => array(),
+			'status_is_not'     => array(),
+			'product_includes'  => array(),
+			'product_excludes'  => array(),
+			'coupon_includes'   => array(),
+			'coupon_excludes'   => array(),
+			'tax_rate_includes' => array(),
+			'tax_rate_excludes' => array(),
+			'customer_type'     => '',
+			'category_includes' => array(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'totals'    => (object) array(),
+				'intervals' => (object) array(),
+				'total'     => 0,
+				'pages'     => 0,
+				'page_no'   => 0,
+			);
+
+			$selections = $this->selected_columns( $query_args );
+			$this->add_time_period_sql_params( $query_args, $table_name );
+			$this->add_intervals_sql_params( $query_args, $table_name );
+			$this->add_order_by_sql_params( $query_args );
+			$where_time  = $this->get_sql_clause( 'where_time' );
+			$params      = $this->get_limit_sql_params( $query_args );
+			$coupon_join = "LEFT JOIN (
+						SELECT
+							order_id,
+							SUM(discount_amount) AS discount_amount,
+							COUNT(DISTINCT coupon_id) AS coupons_count
+						FROM
+							{$wpdb->prefix}wc_order_coupon_lookup
+						GROUP BY
+							order_id
+						) order_coupon_lookup
+						ON order_coupon_lookup.order_id = {$wpdb->prefix}wc_order_stats.order_id";
+
+			// Additional filtering for Orders report.
+			$this->orders_stats_sql_filter( $query_args );
+			$this->total_query->add_sql_clause( 'select', $selections );
+			$this->total_query->add_sql_clause( 'left_join', $coupon_join );
+			$this->total_query->add_sql_clause( 'where_time', $where_time );
+			$totals = $wpdb->get_results(
+				$this->total_query->get_query_statement(),
+				ARRAY_A
+			); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+			if ( null === $totals ) {
+				return new \WP_Error( 'woocommerce_analytics_revenue_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ) );
+			}
+
+			// @todo Remove these assignements when refactoring segmenter classes to use query objects.
+			$totals_query    = array(
+				'from_clause'       => $this->total_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $where_time,
+				'where_clause'      => $this->total_query->get_sql_clause( 'where' ),
+			);
+			$intervals_query = array(
+				'select_clause'     => $this->get_sql_clause( 'select' ),
+				'from_clause'       => $this->interval_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $where_time,
+				'where_clause'      => $this->interval_query->get_sql_clause( 'where' ),
+				'limit'             => $this->get_sql_clause( 'limit' ),
+			);
+
+			$unique_products            = $this->get_unique_product_count( $totals_query['from_clause'], $totals_query['where_time_clause'], $totals_query['where_clause'] );
+			$totals[0]['products']      = $unique_products;
+			$segmenter                  = new Segmenter( $query_args, $this->report_columns );
+			$unique_coupons             = $this->get_unique_coupon_count( $totals_query['from_clause'], $totals_query['where_time_clause'], $totals_query['where_clause'] );
+			$totals[0]['coupons_count'] = $unique_coupons;
+			$totals[0]['segments']      = $segmenter->get_totals_segments( $totals_query, $table_name );
+			$totals                     = (object) $this->cast_numbers( $totals[0] );
+
+			$this->interval_query->add_sql_clause( 'select', $this->get_sql_clause( 'select' ) . ' AS time_interval' );
+			$this->interval_query->add_sql_clause( 'left_join', $coupon_join );
+			$this->interval_query->add_sql_clause( 'where_time', $where_time );
+			$db_intervals = $wpdb->get_col(
+				$this->interval_query->get_query_statement()
+			); // phpcs:ignore cache ok, DB call ok, , unprepared SQL ok.
+
+			$db_interval_count       = count( $db_intervals );
+			$expected_interval_count = TimeInterval::intervals_between( $query_args['after'], $query_args['before'], $query_args['interval'] );
+			$total_pages             = (int) ceil( $expected_interval_count / $params['per_page'] );
+
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return $data;
+			}
+
+			$this->update_intervals_sql_params( $query_args, $db_interval_count, $expected_interval_count, $table_name );
+			$this->interval_query->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->interval_query->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+			$this->interval_query->add_sql_clause( 'select', ", MAX(${table_name}.date_created) AS datetime_anchor" );
+			if ( '' !== $selections ) {
+				$this->interval_query->add_sql_clause( 'select', ', ' . $selections );
+			}
+			$intervals = $wpdb->get_results(
+				$this->interval_query->get_query_statement(),
+				ARRAY_A
+			); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $intervals ) {
+				return new \WP_Error( 'woocommerce_analytics_revenue_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ) );
+			}
+
+			if ( isset( $intervals[0] ) ) {
+				$unique_coupons                = $this->get_unique_coupon_count( $intervals_query['from_clause'], $intervals_query['where_time_clause'], $intervals_query['where_clause'], true );
+				$intervals[0]['coupons_count'] = $unique_coupons;
+			}
+
+			$data = (object) array(
+				'totals'    => $totals,
+				'intervals' => $intervals,
+				'total'     => $expected_interval_count,
+				'pages'     => $total_pages,
+				'page_no'   => (int) $query_args['page'],
+			);
+
+			if ( TimeInterval::intervals_missing( $expected_interval_count, $db_interval_count, $params['per_page'], $query_args['page'], $query_args['order'], $query_args['orderby'], count( $intervals ) ) ) {
+				$this->fill_in_missing_intervals( $db_intervals, $query_args['adj_after'], $query_args['adj_before'], $query_args['interval'], $data );
+				$this->sort_intervals( $data, $query_args['orderby'], $query_args['order'] );
+				$this->remove_extra_records( $data, $query_args['page'], $params['per_page'], $db_interval_count, $expected_interval_count, $query_args['orderby'], $query_args['order'] );
+			} else {
+				$this->update_interval_boundary_dates( $query_args['after'], $query_args['before'], $query_args['interval'], $data->intervals );
+			}
+			$segmenter->add_intervals_segments( $data, $intervals_query, $table_name );
+			$this->create_interval_subtotals( $data->intervals );
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Get unique products based on user time query
+	 *
+	 * @param string $from_clause       From clause with date query.
+	 * @param string $where_time_clause Where clause with date query.
+	 * @param string $where_clause      Where clause with date query.
+	 * @return integer Unique product count.
+	 */
+	public function get_unique_product_count( $from_clause, $where_time_clause, $where_clause ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+		return $wpdb->get_var(
+			"SELECT
+					COUNT( DISTINCT {$wpdb->prefix}wc_order_product_lookup.product_id )
+				FROM
+					{$wpdb->prefix}wc_order_product_lookup JOIN {$table_name} ON {$wpdb->prefix}wc_order_product_lookup.order_id = {$table_name}.order_id
+					{$from_clause}
+				WHERE
+					1=1
+					{$where_time_clause}
+					{$where_clause}"
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+	}
+
+	/**
+	 * Get unique coupons based on user time query
+	 *
+	 * @param string $from_clause       From clause with date query.
+	 * @param string $where_time_clause Where clause with date query.
+	 * @param string $where_clause      Where clause with date query.
+	 * @return integer Unique product count.
+	 */
+	public function get_unique_coupon_count( $from_clause, $where_time_clause, $where_clause ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+		return $wpdb->get_var(
+			"SELECT
+					COUNT(DISTINCT coupon_id)
+				FROM
+					{$wpdb->prefix}wc_order_coupon_lookup JOIN {$table_name} ON {$wpdb->prefix}wc_order_coupon_lookup.order_id = {$table_name}.order_id
+					{$from_clause}
+				WHERE
+					1=1
+					{$where_time_clause}
+					{$where_clause}"
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+	}
+
+	/**
+	 * Add order information to the lookup table when orders are created or modified.
+	 *
+	 * @param int $post_id Post ID.
+	 * @return int|bool Returns -1 if order won't be processed, or a boolean indicating processing success.
+	 */
+	public static function sync_order( $post_id ) {
+		if ( 'shop_order' !== get_post_type( $post_id ) && 'shop_order_refund' !== get_post_type( $post_id ) ) {
+			return -1;
+		}
+
+		$order = wc_get_order( $post_id );
+		if ( ! $order ) {
+			return -1;
+		}
+
+		return self::update( $order );
+	}
+
+	/**
+	 * Update the database with stats data.
+	 *
+	 * @param WC_Order|WC_Order_Refund $order Order or refund to update row for.
+	 * @return int|bool Returns -1 if order won't be processed, or a boolean indicating processing success.
+	 */
+	public static function update( $order ) {
+		global $wpdb;
+		$table_name = self::get_db_table_name();
+
+		if ( ! $order->get_id() || ! $order->get_date_created() ) {
+			return -1;
+		}
+
+		/**
+		 * Filters order stats data.
+		 *
+		 * @param array $data Data written to order stats lookup table.
+		 * @param WC_Order $order  Order object.
+		 */
+		$data = apply_filters(
+			'woocommerce_analytics_update_order_stats_data',
+			array(
+				'order_id'           => $order->get_id(),
+				'parent_id'          => $order->get_parent_id(),
+				'date_created'       => $order->get_date_created()->date( 'Y-m-d H:i:s' ),
+				'date_created_gmt'   => gmdate( 'Y-m-d H:i:s', $order->get_date_created()->getTimestamp() ),
+				'num_items_sold'     => self::get_num_items_sold( $order ),
+				'total_sales'        => $order->get_total(),
+				'tax_total'          => $order->get_total_tax(),
+				'shipping_total'     => $order->get_shipping_total(),
+				'net_total'          => self::get_net_total( $order ),
+				'status'             => self::normalize_order_status( $order->get_status() ),
+				'customer_id'        => $order->get_report_customer_id(),
+				'returning_customer' => $order->is_returning_customer(),
+			),
+			$order
+		);
+
+		$format = array(
+			'%d',
+			'%d',
+			'%s',
+			'%s',
+			'%d',
+			'%f',
+			'%f',
+			'%f',
+			'%f',
+			'%s',
+			'%d',
+			'%d',
+		);
+
+		if ( 'shop_order_refund' === $order->get_type() ) {
+			$parent_order = wc_get_order( $order->get_parent_id() );
+			if ( $parent_order ) {
+				$data['parent_id'] = $parent_order->get_id();
+				$data['status']    = self::normalize_order_status( $parent_order->get_status() );
+			}
+		} else {
+			$data['returning_customer'] = self::is_returning_customer( $order );
+		}
+
+		// Update or add the information to the DB.
+		$result = $wpdb->replace( $table_name, $data, $format );
+
+		/**
+		 * Fires when order's stats reports are updated.
+		 *
+		 * @param int $order_id Order ID.
+		 */
+		do_action( 'woocommerce_analytics_update_order_stats', $order->get_id() );
+
+		// Check the rows affected for success. Using REPLACE can affect 2 rows if the row already exists.
+		return ( 1 === $result || 2 === $result );
+	}
+
+	/**
+	 * Deletes the order stats when an order is deleted.
+	 *
+	 * @param int $post_id Post ID.
+	 */
+	public static function delete_order( $post_id ) {
+		global $wpdb;
+		$order_id = (int) $post_id;
+
+		if ( 'shop_order' !== get_post_type( $order_id ) && 'shop_order_refund' !== get_post_type( $order_id ) ) {
+			return;
+		}
+
+		// Retrieve customer details before the order is deleted.
+		$order       = wc_get_order( $order_id );
+		$customer_id = absint( CustomersDataStore::get_existing_customer_id_from_order( $order ) );
+
+		// Delete the order.
+		$wpdb->delete( self::get_db_table_name(), array( 'order_id' => $order_id ) );
+		/**
+		 * Fires when orders stats are deleted.
+		 *
+		 * @param int $order_id Order ID.
+		 * @param int $customer_id Customer ID.
+		 */
+		do_action( 'woocommerce_analytics_delete_order_stats', $order_id, $customer_id );
+
+		ReportsCache::invalidate();
+	}
+
+
+	/**
+	 * Calculation methods.
+	 */
+
+	/**
+	 * Get number of items sold among all orders.
+	 *
+	 * @param array $order WC_Order object.
+	 * @return int
+	 */
+	protected static function get_num_items_sold( $order ) {
+		$num_items = 0;
+
+		$line_items = $order->get_items( 'line_item' );
+		foreach ( $line_items as $line_item ) {
+			$num_items += $line_item->get_quantity();
+		}
+
+		return $num_items;
+	}
+
+	/**
+	 * Get the net amount from an order without shipping, tax, or refunds.
+	 *
+	 * @param array $order WC_Order object.
+	 * @return float
+	 */
+	protected static function get_net_total( $order ) {
+		$net_total = floatval( $order->get_total() ) - floatval( $order->get_total_tax() ) - floatval( $order->get_shipping_total() );
+		return (float) $net_total;
+	}
+
+	/**
+	 * Check to see if an order's customer has made previous orders or not
+	 *
+	 * @param array $order WC_Order object.
+	 * @return bool
+	 */
+	public static function is_returning_customer( $order ) {
+		$customer_id = \Automattic\WooCommerce\Admin\API\Reports\Customers\DataStore::get_existing_customer_id_from_order( $order );
+
+		if ( ! $customer_id ) {
+			return false;
+		}
+
+		$oldest_orders = \Automattic\WooCommerce\Admin\API\Reports\Customers\DataStore::get_oldest_orders( $customer_id );
+
+		if ( empty( $oldest_orders ) ) {
+			return false;
+		}
+
+		$first_order       = $oldest_orders[0];
+		$second_order      = isset( $oldest_orders[1] ) ? $oldest_orders[1] : false;
+		$excluded_statuses = self::get_excluded_report_order_statuses();
+
+		// Order is older than previous first order.
+		if ( $order->get_date_created() < wc_string_to_datetime( $first_order->date_created ) &&
+			! in_array( $order->get_status(), $excluded_statuses, true )
+		) {
+			self::set_customer_first_order( $customer_id, $order->get_id() );
+			return false;
+		}
+
+		// The current order is the oldest known order.
+		$is_first_order = (int) $order->get_id() === (int) $first_order->order_id;
+		// Order date has changed and next oldest is now the first order.
+		$date_change = $second_order &&
+			$order->get_date_created() > wc_string_to_datetime( $first_order->date_created ) &&
+			wc_string_to_datetime( $second_order->date_created ) < $order->get_date_created();
+		// Status has changed to an excluded status and next oldest order is now the first order.
+		$status_change = $second_order &&
+			in_array( $order->get_status(), $excluded_statuses, true );
+		if ( $is_first_order && ( $date_change || $status_change ) ) {
+			self::set_customer_first_order( $customer_id, $second_order->order_id );
+			return true;
+		}
+
+		return (int) $order->get_id() !== (int) $first_order->order_id;
+	}
+
+	/**
+	 * Set a customer's first order and all others to returning.
+	 *
+	 * @param int $customer_id Customer ID.
+	 * @param int $order_id Order ID.
+	 */
+	protected static function set_customer_first_order( $customer_id, $order_id ) {
+		global $wpdb;
+		$orders_stats_table = self::get_db_table_name();
+
+		$wpdb->query(
+			$wpdb->prepare(
+				"UPDATE ${orders_stats_table} SET returning_customer = CASE WHEN order_id = %d THEN false ELSE true END WHERE customer_id = %d",
+				$order_id,
+				$customer_id
+			)
+		);
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		unset( $this->subquery );
+		$this->total_query = new SqlQuery( $this->context . '_total' );
+		$this->total_query->add_sql_clause( 'from', self::get_db_table_name() );
+
+		$this->interval_query = new SqlQuery( $this->context . '_interval' );
+		$this->interval_query->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->interval_query->add_sql_clause( 'group_by', 'time_interval' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Orders/Stats/Query.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * Class for parameter-based Order Stats Reports querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'interval'     => 'week',
+ *          'categories'   => array(15, 18),
+ *          'coupons'      => array(138),
+ *          'status_in'    => array('completed'),
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Orders\Stats\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Orders\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Orders\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Orders report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array(
+			'fields' => array(
+				'net_revenue',
+				'avg_order_value',
+				'orders_count',
+				'avg_items_per_order',
+				'num_items_sold',
+				'coupons',
+				'coupons_count',
+				'total_customers',
+			),
+		);
+	}
+
+	/**
+	 * Get revenue data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_orders_stats_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-orders-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_orders_stats_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Orders/Stats/Segmenter.php

@@ -0,0 +1,438 @@
+<?php
+/**
+ * Class for adding segmenting support without cluttering the data stores.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Orders\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Segmenter as ReportsSegmenter;
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * Date & time interval and numeric range handling class for Reporting API.
+ */
+class Segmenter extends ReportsSegmenter {
+
+	/**
+	 * Returns column => query mapping to be used for product-related product-level segmenting query
+	 * (e.g. products sold, revenue from product X when segmenting by category).
+	 *
+	 * @param string $products_table Name of SQL table containing the product-level segmenting info.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function get_segment_selections_product_level( $products_table ) {
+		$columns_mapping = array(
+			'num_items_sold' => "SUM($products_table.product_qty) as num_items_sold",
+			'total_sales'    => "SUM($products_table.product_gross_revenue) AS total_sales",
+			'coupons'        => 'SUM( coupon_lookup_left_join.discount_amount ) AS coupons',
+			'coupons_count'  => 'COUNT( DISTINCT( coupon_lookup_left_join.coupon_id ) ) AS coupons_count',
+			'refunds'        => "SUM( CASE WHEN $products_table.product_gross_revenue < 0 THEN $products_table.product_gross_revenue ELSE 0 END ) AS refunds",
+			'taxes'          => "SUM($products_table.tax_amount) AS taxes",
+			'shipping'       => "SUM($products_table.shipping_amount) AS shipping",
+			'net_revenue'    => "SUM($products_table.product_net_revenue) AS net_revenue",
+		);
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Returns column => query mapping to be used for order-related product-level segmenting query
+	 * (e.g. avg items per order when segmented by category).
+	 *
+	 * @param string $unique_orders_table Name of SQL table containing the order-level segmenting info.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function get_segment_selections_order_level( $unique_orders_table ) {
+		$columns_mapping = array(
+			'orders_count'        => "COUNT($unique_orders_table.order_id) AS orders_count",
+			'avg_items_per_order' => "AVG($unique_orders_table.num_items_sold) AS avg_items_per_order",
+			'avg_order_value'     => "SUM($unique_orders_table.net_total) / COUNT($unique_orders_table.order_id) AS avg_order_value",
+			'total_customers'     => "COUNT( DISTINCT( $unique_orders_table.customer_id ) ) AS total_customers",
+		);
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Returns column => query mapping to be used for order-level segmenting query
+	 * (e.g. avg items per order or Net sales when segmented by coupons).
+	 *
+	 * @param string $order_stats_table Name of SQL table containing the order-level info.
+	 * @param array  $overrides Array of overrides for default column calculations.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function segment_selections_orders( $order_stats_table, $overrides = array() ) {
+		$columns_mapping = array(
+			'num_items_sold'      => "SUM($order_stats_table.num_items_sold) as num_items_sold",
+			'total_sales'         => "SUM($order_stats_table.total_sales) AS total_sales",
+			'coupons'             => "SUM($order_stats_table.discount_amount) AS coupons",
+			'coupons_count'       => 'COUNT( DISTINCT(coupon_lookup_left_join.coupon_id) ) AS coupons_count',
+			'refunds'             => "SUM( CASE WHEN $order_stats_table.parent_id != 0 THEN $order_stats_table.total_sales END ) AS refunds",
+			'taxes'               => "SUM($order_stats_table.tax_total) AS taxes",
+			'shipping'            => "SUM($order_stats_table.shipping_total) AS shipping",
+			'net_revenue'         => "SUM($order_stats_table.net_total) AS net_revenue",
+			'orders_count'        => "COUNT($order_stats_table.order_id) AS orders_count",
+			'avg_items_per_order' => "AVG($order_stats_table.num_items_sold) AS avg_items_per_order",
+			'avg_order_value'     => "SUM($order_stats_table.net_total) / COUNT($order_stats_table.order_id) AS avg_order_value",
+			'total_customers'     => "COUNT( DISTINCT( $order_stats_table.customer_id ) ) AS total_customers",
+		);
+
+		if ( $overrides ) {
+			$columns_mapping = array_merge( $columns_mapping, $overrides );
+		}
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Calculate segments for totals where the segmenting property is bound to product (e.g. category, product_id, variation_id).
+	 *
+	 * @param array  $segmenting_selections SELECT part of segmenting SQL query--one for 'product_level' and one for 'order_level'.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $segmenting_dimension_name Name of the segmenting dimension.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $totals_query Array of SQL clauses for totals query.
+	 * @param string $unique_orders_table Name of temporary SQL table that holds unique orders.
+	 *
+	 * @return array
+	 */
+	protected function get_product_related_totals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $totals_query, $unique_orders_table ) {
+		global $wpdb;
+
+		$product_segmenting_table = $wpdb->prefix . 'wc_order_product_lookup';
+
+		// Can't get all the numbers from one query, so split it into one query for product-level numbers and one for order-level numbers (which first need to have orders uniqued).
+		// Product-level numbers.
+		$segments_products = $wpdb->get_results(
+			"SELECT
+						$segmenting_groupby AS $segmenting_dimension_name
+						{$segmenting_selections['product_level']}
+					FROM
+						$table_name
+						$segmenting_from
+						{$totals_query['from_clause']}
+					WHERE
+						1=1
+						{$totals_query['where_time_clause']}
+						{$totals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						$segmenting_groupby",
+			ARRAY_A
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+
+		// Order level numbers.
+		// As there can be 2 same product ids (or variation ids) per one order, the orders first need to be uniqued before calculating averages, customer counts, etc.
+		$segments_orders = $wpdb->get_results(
+			"SELECT
+				    $unique_orders_table.$segmenting_dimension_name AS $segmenting_dimension_name
+				    {$segmenting_selections['order_level']}
+				FROM
+				(
+					SELECT
+				        $table_name.order_id,
+				        $segmenting_groupby AS $segmenting_dimension_name,
+				        MAX( num_items_sold ) AS num_items_sold,
+				        MAX( net_total ) as net_total,
+				        MAX( returning_customer ) AS returning_customer,
+						MAX( $table_name.customer_id ) as customer_id
+				    FROM
+				        $table_name
+				        $segmenting_from
+				        {$totals_query['from_clause']}
+				    WHERE
+				        1=1
+						{$totals_query['where_time_clause']}
+						{$totals_query['where_clause']}
+						$segmenting_where
+				    GROUP BY
+				        $product_segmenting_table.order_id, $segmenting_groupby
+				) AS $unique_orders_table
+				GROUP BY
+				    $unique_orders_table.$segmenting_dimension_name",
+			ARRAY_A
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+
+		$totals_segments = $this->merge_segment_totals_results( $segmenting_dimension_name, $segments_products, $segments_orders );
+		return $totals_segments;
+	}
+
+	/**
+	 * Calculate segments for intervals where the segmenting property is bound to product (e.g. category, product_id, variation_id).
+	 *
+	 * @param array  $segmenting_selections SELECT part of segmenting SQL query--one for 'product_level' and one for 'order_level'.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $segmenting_dimension_name Name of the segmenting dimension.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $intervals_query Array of SQL clauses for intervals query.
+	 * @param string $unique_orders_table Name of temporary SQL table that holds unique orders.
+	 *
+	 * @return array
+	 */
+	protected function get_product_related_intervals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $intervals_query, $unique_orders_table ) {
+		global $wpdb;
+
+		$product_segmenting_table = $wpdb->prefix . 'wc_order_product_lookup';
+
+		// LIMIT offset, rowcount needs to be updated to LIMIT offset, rowcount * max number of segments.
+		$limit_parts      = explode( ',', $intervals_query['limit'] );
+		$orig_rowcount    = intval( $limit_parts[1] );
+		$segmenting_limit = $limit_parts[0] . ',' . $orig_rowcount * count( $this->get_all_segments() );
+
+		// Can't get all the numbers from one query, so split it into one query for product-level numbers and one for order-level numbers (which first need to have orders uniqued).
+		// Product-level numbers.
+		$segments_products = $wpdb->get_results(
+			"SELECT
+						{$intervals_query['select_clause']} AS time_interval,
+						$segmenting_groupby AS $segmenting_dimension_name
+						{$segmenting_selections['product_level']}
+					FROM
+						$table_name
+						$segmenting_from
+						{$intervals_query['from_clause']}
+					WHERE
+						1=1
+						{$intervals_query['where_time_clause']}
+						{$intervals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						time_interval, $segmenting_groupby
+					$segmenting_limit",
+			ARRAY_A
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+
+		// Order level numbers.
+		// As there can be 2 same product ids (or variation ids) per one order, the orders first need to be uniqued before calculating averages, customer counts, etc.
+		$segments_orders = $wpdb->get_results(
+			"SELECT
+					$unique_orders_table.time_interval AS time_interval,
+				    $unique_orders_table.$segmenting_dimension_name AS $segmenting_dimension_name
+				    {$segmenting_selections['order_level']}
+				FROM
+				(
+					SELECT
+						MAX( $table_name.date_created ) AS datetime_anchor,
+						{$intervals_query['select_clause']} AS time_interval,
+				        $table_name.order_id,
+				        $segmenting_groupby AS $segmenting_dimension_name,
+				        MAX( num_items_sold ) AS num_items_sold,
+				        MAX( net_total ) as net_total,
+				        MAX( returning_customer ) AS returning_customer,
+						MAX( $table_name.customer_id ) as customer_id
+				    FROM
+				        $table_name
+				        $segmenting_from
+				        {$intervals_query['from_clause']}
+				    WHERE
+				        1=1
+						{$intervals_query['where_time_clause']}
+						{$intervals_query['where_clause']}
+						$segmenting_where
+				    GROUP BY
+				        time_interval, $product_segmenting_table.order_id, $segmenting_groupby
+				) AS $unique_orders_table
+				GROUP BY
+				    time_interval, $unique_orders_table.$segmenting_dimension_name
+				$segmenting_limit",
+			ARRAY_A
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+
+		$intervals_segments = $this->merge_segment_intervals_results( $segmenting_dimension_name, $segments_products, $segments_orders );
+		return $intervals_segments;
+	}
+
+	/**
+	 * Calculate segments for totals query where the segmenting property is bound to order (e.g. coupon or customer type).
+	 *
+	 * @param string $segmenting_select SELECT part of segmenting SQL query.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $totals_query Array of SQL clauses for intervals query.
+	 *
+	 * @return array
+	 */
+	protected function get_order_related_totals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $totals_query ) {
+		global $wpdb;
+
+		$totals_segments = $wpdb->get_results(
+			"SELECT
+						$segmenting_groupby
+						$segmenting_select
+					FROM
+						$table_name
+						$segmenting_from
+						{$totals_query['from_clause']}
+					WHERE
+						1=1
+						{$totals_query['where_time_clause']}
+						{$totals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						$segmenting_groupby",
+			ARRAY_A
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+
+		// Reformat result.
+		$totals_segments = $this->reformat_totals_segments( $totals_segments, $segmenting_groupby );
+		return $totals_segments;
+	}
+
+	/**
+	 * Calculate segments for intervals query where the segmenting property is bound to order (e.g. coupon or customer type).
+	 *
+	 * @param string $segmenting_select SELECT part of segmenting SQL query.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $intervals_query Array of SQL clauses for intervals query.
+	 *
+	 * @return array
+	 */
+	protected function get_order_related_intervals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $intervals_query ) {
+		global $wpdb;
+		$segmenting_limit = '';
+		$limit_parts      = explode( ',', $intervals_query['limit'] );
+		if ( 2 === count( $limit_parts ) ) {
+			$orig_rowcount    = intval( $limit_parts[1] );
+			$segmenting_limit = $limit_parts[0] . ',' . $orig_rowcount * count( $this->get_all_segments() );
+		}
+
+		$intervals_segments = $wpdb->get_results(
+			"SELECT
+						MAX($table_name.date_created) AS datetime_anchor,
+						{$intervals_query['select_clause']} AS time_interval,
+						$segmenting_groupby
+						$segmenting_select
+					FROM
+						$table_name
+						$segmenting_from
+						{$intervals_query['from_clause']}
+					WHERE
+						1=1
+						{$intervals_query['where_time_clause']}
+						{$intervals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						time_interval, $segmenting_groupby
+					$segmenting_limit",
+			ARRAY_A
+		); // phpcs:ignore cache ok, DB call ok, unprepared SQL ok.
+
+		// Reformat result.
+		$intervals_segments = $this->reformat_intervals_segments( $intervals_segments, $segmenting_groupby );
+		return $intervals_segments;
+	}
+
+	/**
+	 * Return array of segments formatted for REST response.
+	 *
+	 * @param string $type Type of segments to return--'totals' or 'intervals'.
+	 * @param array  $query_params SQL query parameter array.
+	 * @param string $table_name Name of main SQL table for the data store (used as basis for JOINS).
+	 *
+	 * @return array
+	 * @throws \Automattic\WooCommerce\Admin\API\Reports\ParameterException In case of segmenting by variations, when no parent product is specified.
+	 */
+	protected function get_segments( $type, $query_params, $table_name ) {
+		global $wpdb;
+		if ( ! isset( $this->query_args['segmentby'] ) || '' === $this->query_args['segmentby'] ) {
+			return array();
+		}
+
+		$product_segmenting_table = $wpdb->prefix . 'wc_order_product_lookup';
+		$unique_orders_table      = 'uniq_orders';
+		$segmenting_from          = "LEFT JOIN {$wpdb->prefix}wc_order_coupon_lookup AS coupon_lookup_left_join ON ($table_name.order_id = coupon_lookup_left_join.order_id) ";
+		$segmenting_where         = '';
+
+		// Product, variation, and category are bound to product, so here product segmenting table is required,
+		// while coupon and customer are bound to order, so we don't need the extra JOIN for those.
+		// This also means that segment selections need to be calculated differently.
+		if ( 'product' === $this->query_args['segmentby'] ) {
+			// @todo How to handle shipping taxes when grouped by product?
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$order_level_columns       = $this->get_segment_selections_order_level( $unique_orders_table );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+				'order_level'   => $this->prepare_selections( $order_level_columns ),
+			);
+			$this->report_columns      = array_merge( $product_level_columns, $order_level_columns );
+			$segmenting_from          .= "INNER JOIN $product_segmenting_table ON ($table_name.order_id = $product_segmenting_table.order_id)";
+			$segmenting_groupby        = $product_segmenting_table . '.product_id';
+			$segmenting_dimension_name = 'product_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'variation' === $this->query_args['segmentby'] ) {
+			if ( ! isset( $this->query_args['product_includes'] ) || count( $this->query_args['product_includes'] ) !== 1 ) {
+				throw new ParameterException( 'wc_admin_reports_invalid_segmenting_variation', __( 'product_includes parameter need to specify exactly one product when segmenting by variation.', 'woocommerce' ) );
+			}
+
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$order_level_columns       = $this->get_segment_selections_order_level( $unique_orders_table );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+				'order_level'   => $this->prepare_selections( $order_level_columns ),
+			);
+			$this->report_columns      = array_merge( $product_level_columns, $order_level_columns );
+			$segmenting_from          .= "INNER JOIN $product_segmenting_table ON ($table_name.order_id = $product_segmenting_table.order_id)";
+			$segmenting_where          = "AND $product_segmenting_table.product_id = {$this->query_args['product_includes'][0]}";
+			$segmenting_groupby        = $product_segmenting_table . '.variation_id';
+			$segmenting_dimension_name = 'variation_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'category' === $this->query_args['segmentby'] ) {
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$order_level_columns       = $this->get_segment_selections_order_level( $unique_orders_table );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+				'order_level'   => $this->prepare_selections( $order_level_columns ),
+			);
+			$this->report_columns      = array_merge( $product_level_columns, $order_level_columns );
+			$segmenting_from          .= "
+			INNER JOIN $product_segmenting_table ON ($table_name.order_id = $product_segmenting_table.order_id)
+			LEFT JOIN {$wpdb->term_relationships} ON {$product_segmenting_table}.product_id = {$wpdb->term_relationships}.object_id
+			JOIN {$wpdb->term_taxonomy} ON {$wpdb->term_taxonomy}.term_taxonomy_id = {$wpdb->term_relationships}.term_taxonomy_id
+			LEFT JOIN {$wpdb->wc_category_lookup} ON {$wpdb->term_taxonomy}.term_id = {$wpdb->wc_category_lookup}.category_id
+			";
+			$segmenting_where          = " AND {$wpdb->wc_category_lookup}.category_tree_id IS NOT NULL";
+			$segmenting_groupby        = "{$wpdb->wc_category_lookup}.category_tree_id";
+			$segmenting_dimension_name = 'category_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'coupon' === $this->query_args['segmentby'] ) {
+			// As there can be 2 or more coupons applied per one order, coupon amount needs to be split.
+			$coupon_override       = array(
+				'coupons' => 'SUM(coupon_lookup.discount_amount) AS coupons',
+			);
+			$coupon_level_columns  = $this->segment_selections_orders( $table_name, $coupon_override );
+			$segmenting_selections = $this->prepare_selections( $coupon_level_columns );
+			$this->report_columns  = $coupon_level_columns;
+			$segmenting_from      .= "
+			INNER JOIN {$wpdb->prefix}wc_order_coupon_lookup AS coupon_lookup ON ($table_name.order_id = coupon_lookup.order_id)
+            ";
+			$segmenting_groupby    = 'coupon_lookup.coupon_id';
+
+			$segments = $this->get_order_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $query_params );
+		} elseif ( 'customer_type' === $this->query_args['segmentby'] ) {
+			$customer_level_columns = $this->segment_selections_orders( $table_name );
+			$segmenting_selections  = $this->prepare_selections( $customer_level_columns );
+			$this->report_columns   = $customer_level_columns;
+			$segmenting_groupby     = "$table_name.returning_customer";
+
+			$segments = $this->get_order_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $query_params );
+		}
+
+		return $segments;
+	}
+}

packages/woocommerce-admin/src/API/Reports/ParameterException.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * WooCommerce Admin Input Parameter Exception Class
+ *
+ * Exception class thrown when user provides incorrect parameters.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * API\Reports\ParameterException class.
+ */
+class ParameterException extends \WC_Data_Exception {}

packages/woocommerce-admin/src/API/Reports/PerformanceIndicators/Controller.php

@@ -0,0 +1,686 @@
+<?php
+/**
+ * REST API Performance indicators controller
+ *
+ * Handles requests to the /reports/store-performance endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\PerformanceIndicators;
+
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Reports Performance indicators controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/performance-indicators';
+
+	/**
+	 * Contains a list of endpoints by report slug.
+	 *
+	 * @var array
+	 */
+	protected $endpoints = array();
+
+	/**
+	 * Contains a list of active Jetpack module slugs.
+	 *
+	 * @var array
+	 */
+	protected $active_jetpack_modules = null;
+
+	/**
+	 * Contains a list of allowed stats.
+	 *
+	 * @var array
+	 */
+	protected $allowed_stats = array();
+
+	/**
+	 * Contains a list of stat labels.
+	 *
+	 * @var array
+	 */
+	protected $labels = array();
+
+	/**
+	 * Contains a list of endpoints by url.
+	 *
+	 * @var array
+	 */
+	protected $urls = array();
+
+	/**
+	 * Contains a cache of retrieved stats data, grouped by report slug.
+	 *
+	 * @var array
+	 */
+	protected $stats_data = array();
+
+	/**
+	 * Constructor.
+	 */
+	public function __construct() {
+		add_filter( 'woocommerce_rest_performance_indicators_data_value', array( $this, 'format_data_value' ), 10, 5 );
+	}
+
+	/**
+	 * Register the routes for reports.
+	 */
+	public function register_routes() {
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base,
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_item_schema' ),
+			)
+		);
+
+		register_rest_route(
+			$this->namespace,
+			'/' . $this->rest_base . '/allowed',
+			array(
+				array(
+					'methods'             => \WP_REST_Server::READABLE,
+					'callback'            => array( $this, 'get_allowed_items' ),
+					'permission_callback' => array( $this, 'get_items_permissions_check' ),
+					'args'                => $this->get_collection_params(),
+				),
+				'schema' => array( $this, 'get_public_allowed_item_schema' ),
+			)
+		);
+	}
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args           = array();
+		$args['before'] = $request['before'];
+		$args['after']  = $request['after'];
+		$args['stats']  = $request['stats'];
+		return $args;
+	}
+
+	/**
+	 * Get analytics report data and endpoints.
+	 */
+	public function get_analytics_report_data() {
+		$request  = new \WP_REST_Request( 'GET', '/wc-analytics/reports' );
+		$response = rest_do_request( $request );
+
+		if ( is_wp_error( $response ) ) {
+			return $response;
+		}
+
+		if ( 200 !== $response->get_status() ) {
+			return new \WP_Error( 'woocommerce_analytics_performance_indicators_result_failed', __( 'Sorry, fetching performance indicators failed.', 'woocommerce' ) );
+		}
+
+		$endpoints = $response->get_data();
+
+		foreach ( $endpoints as $endpoint ) {
+			if ( '/stats' === substr( $endpoint['slug'], -6 ) ) {
+				$request  = new \WP_REST_Request( 'OPTIONS', $endpoint['path'] );
+				$response = rest_do_request( $request );
+
+				if ( is_wp_error( $response ) ) {
+					return $response;
+				}
+
+				$data = $response->get_data();
+
+				$prefix = substr( $endpoint['slug'], 0, -6 );
+
+				if ( empty( $data['schema']['properties']['totals']['properties'] ) ) {
+					continue;
+				}
+
+				foreach ( $data['schema']['properties']['totals']['properties'] as $property_key => $schema_info ) {
+					if ( empty( $schema_info['indicator'] ) || ! $schema_info['indicator'] ) {
+						continue;
+					}
+
+					$stat                   = $prefix . '/' . $property_key;
+					$this->allowed_stats[]  = $stat;
+					$stat_label             = empty( $schema_info['title'] ) ? $schema_info['description'] : $schema_info['title'];
+					$this->labels[ $stat ]  = trim( $stat_label, '.' );
+					$this->formats[ $stat ] = isset( $schema_info['format'] ) ? $schema_info['format'] : 'number';
+				}
+
+				$this->endpoints[ $prefix ] = $endpoint['path'];
+				$this->urls[ $prefix ]      = $endpoint['_links']['report'][0]['href'];
+			}
+		}
+	}
+
+	/**
+	 * Get active Jetpack modules.
+	 *
+	 * @return array List of active Jetpack module slugs.
+	 */
+	public function get_active_jetpack_modules() {
+		if ( is_null( $this->active_jetpack_modules ) ) {
+			if ( class_exists( '\Jetpack' ) && method_exists( '\Jetpack', 'get_active_modules' ) ) {
+				$active_modules               = \Jetpack::get_active_modules();
+				$this->active_jetpack_modules = is_array( $active_modules ) ? $active_modules : array();
+			} else {
+				$this->active_jetpack_modules = array();
+			}
+		}
+
+		return $this->active_jetpack_modules;
+	}
+
+	/**
+	 * Set active Jetpack modules.
+	 *
+	 * @param array $modules List of active Jetpack module slugs.
+	 */
+	public function set_active_jetpack_modules( $modules ) {
+		$this->active_jetpack_modules = $modules;
+	}
+
+	/**
+	 * Get active Jetpack modules and endpoints.
+	 */
+	public function get_jetpack_modules_data() {
+		$active_modules = $this->get_active_jetpack_modules();
+
+		if ( empty( $active_modules ) ) {
+			return;
+		}
+
+		$items = apply_filters(
+			'woocommerce_rest_performance_indicators_jetpack_items',
+			array(
+				'stats/visitors' => array(
+					'label'      => __( 'Visitors', 'woocommerce' ),
+					'permission' => 'view_stats',
+					'format'     => 'number',
+					'module'     => 'stats',
+				),
+				'stats/views'    => array(
+					'label'      => __( 'Views', 'woocommerce' ),
+					'permission' => 'view_stats',
+					'format'     => 'number',
+					'module'     => 'stats',
+				),
+			)
+		);
+
+		foreach ( $items as $item_key => $item ) {
+			if ( ! in_array( $item['module'], $active_modules, true ) ) {
+				return;
+			}
+
+			if ( $item['permission'] && ! current_user_can( $item['permission'] ) ) {
+				return;
+			}
+
+			$stat                         = 'jetpack/' . $item_key;
+			$endpoint                     = 'jetpack/' . $item['module'];
+			$this->allowed_stats[]        = $stat;
+			$this->labels[ $stat ]        = $item['label'];
+			$this->endpoints[ $endpoint ] = '/jetpack/v4/module/' . $item['module'] . '/data';
+			$this->formats[ $stat ]       = $item['format'];
+		}
+
+		$this->urls['jetpack/stats'] = '/jetpack';
+	}
+
+	/**
+	 * Get information such as allowed stats, stat labels, and endpoint data from stats reports.
+	 *
+	 * @return WP_Error|True
+	 */
+	private function get_indicator_data() {
+		// Data already retrieved.
+		if ( ! empty( $this->endpoints ) && ! empty( $this->labels ) && ! empty( $this->allowed_stats ) ) {
+			return true;
+		}
+
+		$this->get_analytics_report_data();
+		$this->get_jetpack_modules_data();
+
+		return true;
+	}
+
+	/**
+	 * Returns a list of allowed performance indicators.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_allowed_items( $request ) {
+		$indicator_data = $this->get_indicator_data();
+		if ( is_wp_error( $indicator_data ) ) {
+			return $indicator_data;
+		}
+
+		$data = array();
+		foreach ( $this->allowed_stats as $stat ) {
+			$pieces = $this->get_stats_parts( $stat );
+			$report = $pieces[0];
+			$chart  = $pieces[1];
+			$data[] = (object) array(
+				'stat'  => $stat,
+				'chart' => $chart,
+				'label' => $this->labels[ $stat ],
+			);
+		}
+
+		usort( $data, array( $this, 'sort' ) );
+
+		$objects = array();
+		foreach ( $data as $item ) {
+			$prepared  = $this->prepare_item_for_response( $item, $request );
+			$objects[] = $this->prepare_response_for_collection( $prepared );
+		}
+
+		$response = rest_ensure_response( $objects );
+		$response->header( 'X-WP-Total', count( $data ) );
+		$response->header( 'X-WP-TotalPages', 1 );
+
+		$base = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+
+		return $response;
+	}
+
+	/**
+	 * Sorts the list of stats. Sorted by custom arrangement.
+	 *
+	 * @see https://github.com/woocommerce/woocommerce-admin/issues/1282
+	 * @param object $a First item.
+	 * @param object $b Second item.
+	 * @return order
+	 */
+	public function sort( $a, $b ) {
+		/**
+		 * Custom ordering for store performance indicators.
+		 *
+		 * @see https://github.com/woocommerce/woocommerce-admin/issues/1282
+		 * @param array $indicators A list of ordered indicators.
+		 */
+		$stat_order = apply_filters(
+			'woocommerce_rest_report_sort_performance_indicators',
+			array(
+				'revenue/total_sales',
+				'revenue/net_revenue',
+				'orders/orders_count',
+				'orders/avg_order_value',
+				'products/items_sold',
+				'revenue/refunds',
+				'coupons/orders_count',
+				'coupons/amount',
+				'taxes/total_tax',
+				'taxes/order_tax',
+				'taxes/shipping_tax',
+				'revenue/shipping',
+				'downloads/download_count',
+			)
+		);
+
+		$a = array_search( $a->stat, $stat_order, true );
+		$b = array_search( $b->stat, $stat_order, true );
+
+		if ( false === $a && false === $b ) {
+			return 0;
+		} elseif ( false === $a ) {
+			return 1;
+		} elseif ( false === $b ) {
+			return -1;
+		} else {
+			return $a - $b;
+		}
+	}
+
+	/**
+	 * Get report stats data, avoiding duplicate requests for stats that use the same endpoint.
+	 *
+	 * @param string $report Report slug to request data for.
+	 * @param array  $query_args Report query args.
+	 * @return WP_REST_Response|WP_Error Report stats data.
+	 */
+	public function get_stats_data( $report, $query_args ) {
+		// Return from cache if we've already requested these report stats.
+		if ( isset( $this->stats_data[ $report ] ) ) {
+			return $this->stats_data[ $report ];
+		}
+
+		// Request the report stats.
+		$request_url = $this->endpoints[ $report ];
+		$request     = new \WP_REST_Request( 'GET', $request_url );
+		$request->set_param( 'before', $query_args['before'] );
+		$request->set_param( 'after', $query_args['after'] );
+
+		$response = rest_do_request( $request );
+
+		// Cache the response.
+		$this->stats_data[ $report ] = $response;
+
+		return $response;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$indicator_data = $this->get_indicator_data();
+		if ( is_wp_error( $indicator_data ) ) {
+			return $indicator_data;
+		}
+
+		$query_args = $this->prepare_reports_query( $request );
+		if ( empty( $query_args['stats'] ) ) {
+			return new \WP_Error( 'woocommerce_analytics_performance_indicators_empty_query', __( 'A list of stats to query must be provided.', 'woocommerce' ), 400 );
+		}
+
+		$stats = array();
+		foreach ( $query_args['stats'] as $stat ) {
+			$is_error = false;
+
+			$pieces = $this->get_stats_parts( $stat );
+			$report = $pieces[0];
+			$chart  = $pieces[1];
+
+			if ( ! in_array( $stat, $this->allowed_stats, true ) ) {
+				continue;
+			}
+
+			$response = $this->get_stats_data( $report, $query_args );
+
+			if ( is_wp_error( $response ) ) {
+				return $response;
+			}
+
+			$data   = $response->get_data();
+			$format = $this->formats[ $stat ];
+			$label  = $this->labels[ $stat ];
+
+			if ( 200 !== $response->get_status() ) {
+				$stats[] = (object) array(
+					'stat'   => $stat,
+					'chart'  => $chart,
+					'label'  => $label,
+					'format' => $format,
+					'value'  => null,
+				);
+				continue;
+			}
+
+			$stats[] = (object) array(
+				'stat'   => $stat,
+				'chart'  => $chart,
+				'label'  => $label,
+				'format' => $format,
+				'value'  => apply_filters( 'woocommerce_rest_performance_indicators_data_value', $data, $stat, $report, $chart, $query_args ),
+			);
+		}
+
+		usort( $stats, array( $this, 'sort' ) );
+
+		$objects = array();
+		foreach ( $stats as $stat ) {
+			$data      = $this->prepare_item_for_response( $stat, $request );
+			$objects[] = $this->prepare_response_for_collection( $data );
+		}
+
+		$response = rest_ensure_response( $objects );
+		$response->header( 'X-WP-Total', count( $stats ) );
+		$response->header( 'X-WP-TotalPages', 1 );
+
+		$base = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $stat_data    Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $stat_data, $request ) {
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $stat_data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		$response->add_links( $this->prepare_links( $data ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_performance_indicators', $response, $stat_data, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param \Automattic\WooCommerce\Admin\API\Reports\Query $object Object data.
+	 * @return array
+	 */
+	protected function prepare_links( $object ) {
+		$pieces   = $this->get_stats_parts( $object->stat );
+		$endpoint = $pieces[0];
+		$stat     = $pieces[1];
+		$url      = isset( $this->urls[ $endpoint ] ) ? $this->urls[ $endpoint ] : '';
+
+		$links = array(
+			'api'    => array(
+				'href' => rest_url( $this->endpoints[ $endpoint ] ),
+			),
+			'report' => array(
+				'href' => $url,
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Returns the endpoint part of a stat request (prefix) and the actual stat total we want.
+	 * To allow extensions to namespace (example: fue/emails/sent), we break on the last forward slash.
+	 *
+	 * @param string $full_stat A stat request string like orders/avg_order_value or fue/emails/sent.
+	 * @return array Containing the prefix (endpoint) and suffix (stat).
+	 */
+	private function get_stats_parts( $full_stat ) {
+		$endpoint = substr( $full_stat, 0, strrpos( $full_stat, '/' ) );
+		$stat     = substr( $full_stat, ( strrpos( $full_stat, '/' ) + 1 ) );
+		return array(
+			$endpoint,
+			$stat,
+		);
+	}
+
+	/**
+	 * Format the data returned from the API for given stats.
+	 *
+	 * @param array  $data Data from external endpoint.
+	 * @param string $stat Name of the stat.
+	 * @param string $report Name of the report.
+	 * @param string $chart Name of the chart.
+	 * @param array  $query_args Query args.
+	 * @return mixed
+	 */
+	public function format_data_value( $data, $stat, $report, $chart, $query_args ) {
+		if ( 'jetpack/stats' === $report ) {
+			// Get the index of the field to tally.
+			$index = array_search( $chart, $data['general']->visits->fields, true );
+			if ( ! $index ) {
+				return null;
+			}
+
+			// Loop over provided data and filter by the queried date.
+			// Note that this is currently limited to 30 days via the Jetpack API
+			// but the WordPress.com endpoint allows up to 90 days.
+			$total  = 0;
+			$before = gmdate( 'Y-m-d', strtotime( isset( $query_args['before'] ) ? $query_args['before'] : TimeInterval::default_before() ) );
+			$after  = gmdate( 'Y-m-d', strtotime( isset( $query_args['after'] ) ? $query_args['after'] : TimeInterval::default_after() ) );
+			foreach ( $data['general']->visits->data as $datum ) {
+				if ( $datum[0] >= $after && $datum[0] <= $before ) {
+					$total += $datum[ $index ];
+				}
+			}
+			return $total;
+		}
+
+		if ( isset( $data['totals'] ) && isset( $data['totals'][ $chart ] ) ) {
+			return $data['totals'][ $chart ];
+		}
+
+		return null;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$indicator_data = $this->get_indicator_data();
+		if ( is_wp_error( $indicator_data ) ) {
+			$allowed_stats = array();
+		} else {
+			$allowed_stats = $this->allowed_stats;
+		}
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_performance_indicator',
+			'type'       => 'object',
+			'properties' => array(
+				'stat'   => array(
+					'description' => __( 'Unique identifier for the resource.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'enum'        => $allowed_stats,
+				),
+				'chart'  => array(
+					'description' => __( 'The specific chart this stat referrers to.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'label'  => array(
+					'description' => __( 'Human readable label for the stat.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'format' => array(
+					'description' => __( 'Format of the stat.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'enum'        => array( 'number', 'currency' ),
+				),
+				'value'  => array(
+					'description' => __( 'Value of the stat. Returns null if the stat does not exist or cannot be loaded.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get schema for the list of allowed performance indicators.
+	 *
+	 * @return array $schema
+	 */
+	public function get_public_allowed_item_schema() {
+		$schema = $this->get_public_item_schema();
+		unset( $schema['properties']['value'] );
+		unset( $schema['properties']['format'] );
+		return $schema;
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$indicator_data = $this->get_indicator_data();
+		if ( is_wp_error( $indicator_data ) ) {
+			$allowed_stats = __( 'There was an issue loading the report endpoints', 'woocommerce' );
+		} else {
+			$allowed_stats = implode( ', ', $this->allowed_stats );
+		}
+
+		$params            = array();
+		$params['context'] = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['stats']   = array(
+			'description'       => sprintf(
+				/* translators: Allowed values is a list of stat endpoints. */
+				__( 'Limit response to specific report stats. Allowed values: %s.', 'woocommerce' ),
+				$allowed_stats
+			),
+			'type'              => 'array',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+				'enum' => $this->allowed_stats,
+			),
+			'default'           => $this->allowed_stats,
+		);
+		$params['after']   = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']  = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Products/Controller.php

@@ -0,0 +1,453 @@
+<?php
+/**
+ * REST API Reports products controller
+ *
+ * Handles requests to the /reports/products endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Products;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+
+/**
+ * REST API Reports products controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller implements ExportableInterface {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/products';
+
+	/**
+	 * Mapping between external parameter name and name used in query class.
+	 *
+	 * @var array
+	 */
+	protected $param_mapping = array(
+		'categories' => 'category_includes',
+		'products'   => 'product_includes',
+		'variations' => 'variation_includes',
+	);
+
+	/**
+	 * Get items.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 *
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$args       = array();
+		$registered = array_keys( $this->get_collection_params() );
+		foreach ( $registered as $param_name ) {
+			if ( isset( $request[ $param_name ] ) ) {
+				if ( isset( $this->param_mapping[ $param_name ] ) ) {
+					$args[ $this->param_mapping[ $param_name ] ] = $request[ $param_name ];
+				} else {
+					$args[ $param_name ] = $request[ $param_name ];
+				}
+			}
+		}
+
+		$reports       = new Query( $args );
+		$products_data = $reports->get_data();
+
+		$data = array();
+
+		foreach ( $products_data->data as $product_data ) {
+			$item = $this->prepare_item_for_response( $product_data, $request );
+			if ( isset( $item->data['extended_info']['name'] ) ) {
+				$item->data['extended_info']['name'] = wp_strip_all_tags( $item->data['extended_info']['name'] );
+			}
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', (int) $products_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $products_data->pages );
+
+		$page      = $products_data->page_no;
+		$max_pages = $products_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $report ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_products', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param Array $object Object data.
+	 * @return array        Links for the given post.
+	 */
+	protected function prepare_links( $object ) {
+		$links = array(
+			'product' => array(
+				'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, 'products', $object['product_id'] ) ),
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_products',
+			'type'       => 'object',
+			'properties' => array(
+				'product_id'    => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Product ID.', 'woocommerce' ),
+				),
+				'items_sold'    => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Number of items sold.', 'woocommerce' ),
+				),
+				'net_revenue'   => array(
+					'type'        => 'number',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Total Net sales of all items sold.', 'woocommerce' ),
+				),
+				'orders_count'  => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Number of orders product appeared in.', 'woocommerce' ),
+				),
+				'extended_info' => array(
+					'name'             => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product name.', 'woocommerce' ),
+					),
+					'price'            => array(
+						'type'        => 'number',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product price.', 'woocommerce' ),
+					),
+					'image'            => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product image.', 'woocommerce' ),
+					),
+					'permalink'        => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product link.', 'woocommerce' ),
+					),
+					'category_ids'     => array(
+						'type'        => 'array',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product category IDs.', 'woocommerce' ),
+					),
+					'stock_status'     => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product inventory status.', 'woocommerce' ),
+					),
+					'stock_quantity'   => array(
+						'type'        => 'integer',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product inventory quantity.', 'woocommerce' ),
+					),
+					'low_stock_amount' => array(
+						'type'        => 'integer',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product inventory threshold for low stock.', 'woocommerce' ),
+					),
+					'variations'       => array(
+						'type'        => 'array',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product variations IDs.', 'woocommerce' ),
+					),
+					'sku'              => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product SKU.', 'woocommerce' ),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params               = array();
+		$params['context']    = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']       = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']   = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']      = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']     = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']      = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']    = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'net_revenue',
+				'orders_count',
+				'items_sold',
+				'product_name',
+				'variations',
+				'sku',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['categories'] = array(
+			'description'       => __( 'Limit result to items from the specified categories.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['match']      = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: status_is, status_is_not, product_includes, product_excludes, coupon_includes, coupon_excludes, customer, categories', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['products']   = array(
+			'description'       => __( 'Limit result to items with specified product ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+
+		);
+		$params['extended_info'] = array(
+			'description'       => __( 'Add additional piece of info about each product to the report.', 'woocommerce' ),
+			'type'              => 'boolean',
+			'default'           => false,
+			'sanitize_callback' => 'wc_string_to_bool',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get stock status column export value.
+	 *
+	 * @param array $status Stock status from report row.
+	 * @return string
+	 */
+	protected function _get_stock_status( $status ) {
+		$statuses = wc_get_product_stock_status_options();
+
+		return isset( $statuses[ $status ] ) ? $statuses[ $status ] : '';
+	}
+
+	/**
+	 * Get categories column export value.
+	 *
+	 * @param array $category_ids Category IDs from report row.
+	 * @return string
+	 */
+	protected function _get_categories( $category_ids ) {
+		$category_names = get_terms(
+			array(
+				'taxonomy' => 'product_cat',
+				'include'  => $category_ids,
+				'fields'   => 'names',
+			)
+		);
+
+		return implode( ', ', $category_names );
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'product_name' => __( 'Product title', 'woocommerce' ),
+			'sku'          => __( 'SKU', 'woocommerce' ),
+			'items_sold'   => __( 'Items sold', 'woocommerce' ),
+			'net_revenue'  => __( 'N. Revenue', 'woocommerce' ),
+			'orders_count' => __( 'Orders', 'woocommerce' ),
+			'product_cat'  => __( 'Category', 'woocommerce' ),
+			'variations'   => __( 'Variations', 'woocommerce' ),
+		);
+
+		if ( 'yes' === get_option( 'woocommerce_manage_stock' ) ) {
+			$export_columns['stock_status'] = __( 'Status', 'woocommerce' );
+			$export_columns['stock']        = __( 'Stock', 'woocommerce' );
+		}
+
+		/**
+		 * Filter to add or remove column names from the products report for
+		 * export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_products_export_columns',
+			$export_columns
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$export_item = array(
+			'product_name' => $item['extended_info']['name'],
+			'sku'          => $item['extended_info']['sku'],
+			'items_sold'   => $item['items_sold'],
+			'net_revenue'  => $item['net_revenue'],
+			'orders_count' => $item['orders_count'],
+			'product_cat'  => $this->_get_categories( $item['extended_info']['category_ids'] ),
+			'variations'   => isset( $item['extended_info']['variations'] ) ? count( $item['extended_info']['variations'] ) : 0,
+		);
+
+		if ( 'yes' === get_option( 'woocommerce_manage_stock' ) ) {
+			if ( $item['extended_info']['manage_stock'] ) {
+				$export_item['stock_status'] = $this->_get_stock_status( $item['extended_info']['stock_status'] );
+				$export_item['stock']        = $item['extended_info']['stock_quantity'];
+			} else {
+				$export_item['stock_status'] = __( 'N/A', 'woocommerce' );
+				$export_item['stock']        = __( 'N/A', 'woocommerce' );
+			}
+		}
+
+		/**
+		 * Filter to prepare extra columns in the export item for the products
+		 * report.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_products_prepare_export_item',
+			$export_item,
+			$item
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Products/DataStore.php

@@ -0,0 +1,531 @@
+<?php
+/**
+ * API\Reports\Products\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Products;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+use \Automattic\WooCommerce\Admin\API\Reports\Cache as ReportsCache;
+
+/**
+ * API\Reports\Products\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_product_lookup';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'products';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'date_start'       => 'strval',
+		'date_end'         => 'strval',
+		'product_id'       => 'intval',
+		'items_sold'       => 'intval',
+		'net_revenue'      => 'floatval',
+		'orders_count'     => 'intval',
+		// Extended attributes.
+		'name'             => 'strval',
+		'price'            => 'floatval',
+		'image'            => 'strval',
+		'permalink'        => 'strval',
+		'stock_status'     => 'strval',
+		'stock_quantity'   => 'intval',
+		'low_stock_amount' => 'intval',
+		'category_ids'     => 'array_values',
+		'variations'       => 'array_values',
+		'sku'              => 'strval',
+	);
+
+	/**
+	 * Extended product attributes to include in the data.
+	 *
+	 * @var array
+	 */
+	protected $extended_attributes = array(
+		'name',
+		'price',
+		'image',
+		'permalink',
+		'stock_status',
+		'stock_quantity',
+		'manage_stock',
+		'low_stock_amount',
+		'category_ids',
+		'variations',
+		'sku',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'products';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'product_id'   => 'product_id',
+			'items_sold'   => 'SUM(product_qty) as items_sold',
+			'net_revenue'  => 'SUM(product_net_revenue) AS net_revenue',
+			'orders_count' => "COUNT( DISTINCT ( CASE WHEN product_gross_revenue >= 0 THEN {$table_name}.order_id END ) ) as orders_count",
+		);
+	}
+
+	/**
+	 * Set up all the hooks for maintaining and populating table data.
+	 */
+	public static function init() {
+		add_action( 'woocommerce_analytics_delete_order_stats', array( __CLASS__, 'sync_on_order_delete' ), 10 );
+	}
+
+	/**
+	 * Fills FROM clause of SQL request based on user supplied parameters.
+	 *
+	 * @param array  $query_args Parameters supplied by the user.
+	 * @param string $arg_name   Target of the JOIN sql param.
+	 * @param string $id_cell    ID cell identifier, like `table_name.id_column_name`.
+	 */
+	protected function add_from_sql_params( $query_args, $arg_name, $id_cell ) {
+		global $wpdb;
+
+		$type = 'join';
+		// Order by product name requires extra JOIN.
+		switch ( $query_args['orderby'] ) {
+			case 'product_name':
+				$join = " JOIN {$wpdb->posts} AS _products ON {$id_cell} = _products.ID";
+				break;
+			case 'sku':
+				$join = " LEFT JOIN {$wpdb->postmeta} AS postmeta ON {$id_cell} = postmeta.post_id AND postmeta.meta_key = '_sku'";
+				break;
+			case 'variations':
+				$type = 'left_join';
+				$join = "LEFT JOIN ( SELECT post_parent, COUNT(*) AS variations FROM {$wpdb->posts} WHERE post_type = 'product_variation' GROUP BY post_parent ) AS _variations ON {$id_cell} = _variations.post_parent";
+				break;
+			default:
+				$join = '';
+				break;
+		}
+		if ( $join ) {
+			if ( 'inner' === $arg_name ) {
+				$this->subquery->add_sql_clause( $type, $join );
+			} else {
+				$this->add_sql_clause( $type, $join );
+			}
+		}
+	}
+
+	/**
+	 * Updates the database query with parameters used for Products report: categories and order status.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+		$order_product_lookup_table = self::get_db_table_name();
+
+		$this->add_time_period_sql_params( $query_args, $order_product_lookup_table );
+		$this->get_limit_sql_params( $query_args );
+		$this->add_order_by_sql_params( $query_args );
+
+		$included_products = $this->get_included_products( $query_args );
+		if ( $included_products ) {
+			$this->add_from_sql_params( $query_args, 'outer', 'default_results.product_id' );
+			$this->subquery->add_sql_clause( 'where', "AND {$order_product_lookup_table}.product_id IN ({$included_products})" );
+		} else {
+			$this->add_from_sql_params( $query_args, 'inner', "{$order_product_lookup_table}.product_id" );
+		}
+
+		$included_variations = $this->get_included_variations( $query_args );
+		if ( $included_variations ) {
+			$this->subquery->add_sql_clause( 'where', "AND {$order_product_lookup_table}.variation_id IN ({$included_variations})" );
+		}
+
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		if ( $order_status_filter ) {
+			$this->subquery->add_sql_clause( 'join', "JOIN {$wpdb->prefix}wc_order_stats ON {$order_product_lookup_table}.order_id = {$wpdb->prefix}wc_order_stats.order_id" );
+			$this->subquery->add_sql_clause( 'where', "AND ( {$order_status_filter} )" );
+		}
+	}
+
+	/**
+	 * Maps ordering specified by the user to columns in the database/fields in the data.
+	 *
+	 * @param string $order_by Sorting criterion.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return self::get_db_table_name() . '.date_created';
+		}
+		if ( 'product_name' === $order_by ) {
+			return 'post_title';
+		}
+		if ( 'sku' === $order_by ) {
+			return 'meta_value';
+		}
+		return $order_by;
+	}
+
+	/**
+	 * Enriches the product data with attributes specified by the extended_attributes.
+	 *
+	 * @param array $products_data Product data.
+	 * @param array $query_args  Query parameters.
+	 */
+	protected function include_extended_info( &$products_data, $query_args ) {
+		global $wpdb;
+		$product_names = array();
+
+		foreach ( $products_data as $key => $product_data ) {
+			$extended_info = new \ArrayObject();
+			if ( $query_args['extended_info'] ) {
+				$product_id = $product_data['product_id'];
+				$product    = wc_get_product( $product_id );
+				// Product was deleted.
+				if ( ! $product ) {
+					if ( ! isset( $product_names[ $product_id ] ) ) {
+						$product_names[ $product_id ] = $wpdb->get_var(
+							$wpdb->prepare(
+								"SELECT i.order_item_name
+								FROM {$wpdb->prefix}woocommerce_order_items i, {$wpdb->prefix}woocommerce_order_itemmeta m
+								WHERE i.order_item_id = m.order_item_id
+								AND m.meta_key = '_product_id'
+								AND m.meta_value = %s
+								ORDER BY i.order_item_id DESC
+								LIMIT 1",
+								$product_id
+							)
+						);
+					}
+
+					/* translators: %s is product name */
+					$products_data[ $key ]['extended_info']['name'] = $product_names[ $product_id ] ? sprintf( __( '%s (Deleted)', 'woocommerce' ), $product_names[ $product_id ] ) : __( '(Deleted)', 'woocommerce' );
+					continue;
+				}
+
+				$extended_attributes = apply_filters( 'woocommerce_rest_reports_products_extended_attributes', $this->extended_attributes, $product_data );
+				foreach ( $extended_attributes as $extended_attribute ) {
+					if ( 'variations' === $extended_attribute ) {
+						if ( ! $product->is_type( 'variable' ) ) {
+							continue;
+						}
+						$function = 'get_children';
+					} else {
+						$function = 'get_' . $extended_attribute;
+					}
+					if ( is_callable( array( $product, $function ) ) ) {
+						$value                                = $product->{$function}();
+						$extended_info[ $extended_attribute ] = $value;
+					}
+				}
+				// If there is no set low_stock_amount, use the one in user settings.
+				if ( '' === $extended_info['low_stock_amount'] ) {
+					$extended_info['low_stock_amount'] = absint( max( get_option( 'woocommerce_notify_low_stock_amount' ), 1 ) );
+				}
+				$extended_info = $this->cast_numbers( $extended_info );
+			}
+			$products_data[ $key ]['extended_info'] = $extended_info;
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'          => get_option( 'posts_per_page' ),
+			'page'              => 1,
+			'order'             => 'DESC',
+			'orderby'           => 'date',
+			'before'            => TimeInterval::default_before(),
+			'after'             => TimeInterval::default_after(),
+			'fields'            => '*',
+			'category_includes' => array(),
+			'product_includes'  => array(),
+			'extended_info'     => false,
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$selections        = $this->selected_columns( $query_args );
+			$included_products = $this->get_included_products_array( $query_args );
+			$params            = $this->get_limit_params( $query_args );
+			$this->add_sql_query_params( $query_args );
+
+			if ( count( $included_products ) > 0 ) {
+				$filtered_products = array_diff( $included_products, array( '-1' ) );
+				$total_results     = count( $filtered_products );
+				$total_pages       = (int) ceil( $total_results / $params['per_page'] );
+
+				if ( 'date' === $query_args['orderby'] ) {
+					$selections .= ", {$table_name}.date_created";
+				}
+
+				$fields          = $this->get_fields( $query_args );
+				$join_selections = $this->format_join_selections( $fields, array( 'product_id' ) );
+				$ids_table       = $this->get_ids_table( $included_products, 'product_id' );
+
+				$this->subquery->clear_sql_clause( 'select' );
+				$this->subquery->add_sql_clause( 'select', $selections );
+				$this->add_sql_clause( 'select', $join_selections );
+				$this->add_sql_clause( 'from', '(' );
+				$this->add_sql_clause( 'from', $this->subquery->get_query_statement() );
+				$this->add_sql_clause( 'from', ") AS {$table_name}" );
+				$this->add_sql_clause(
+					'right_join',
+					"RIGHT JOIN ( {$ids_table} ) AS default_results
+					ON default_results.product_id = {$table_name}.product_id"
+				);
+				$this->add_sql_clause( 'where', 'AND default_results.product_id != -1' );
+
+				$products_query = $this->get_query_statement();
+			} else {
+				$count_query      = "SELECT COUNT(*) FROM (
+						{$this->subquery->get_query_statement()}
+					) AS tt";
+				$db_records_count = (int) $wpdb->get_var(
+					$count_query // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+				);
+
+				$total_results = $db_records_count;
+				$total_pages   = (int) ceil( $db_records_count / $params['per_page'] );
+
+				if ( ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) ) {
+					return $data;
+				}
+
+				$this->subquery->clear_sql_clause( 'select' );
+				$this->subquery->add_sql_clause( 'select', $selections );
+				$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+				$this->subquery->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+				$products_query = $this->subquery->get_query_statement();
+			}
+
+			$product_data = $wpdb->get_results(
+				$products_query, // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+				ARRAY_A
+			);
+
+			if ( null === $product_data ) {
+				return $data;
+			}
+
+			$this->include_extended_info( $product_data, $query_args );
+
+			$product_data = array_map( array( $this, 'cast_numbers' ), $product_data );
+			$data         = (object) array(
+				'data'    => $product_data,
+				'total'   => $total_results,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Create or update an entry in the wc_admin_order_product_lookup table for an order.
+	 *
+	 * @since 3.5.0
+	 * @param int $order_id Order ID.
+	 * @return int|bool Returns -1 if order won't be processed, or a boolean indicating processing success.
+	 */
+	public static function sync_order_products( $order_id ) {
+		global $wpdb;
+
+		$order = wc_get_order( $order_id );
+		if ( ! $order ) {
+			return -1;
+		}
+
+		$table_name     = self::get_db_table_name();
+		$existing_items = $wpdb->get_col(
+			$wpdb->prepare(
+				// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+				"SELECT order_item_id FROM {$table_name} WHERE order_id = %d",
+				$order_id
+			)
+		);
+		$existing_items = array_flip( $existing_items );
+		$order_items    = $order->get_items();
+		$num_updated    = 0;
+		$decimals       = wc_get_price_decimals();
+		$round_tax      = 'no' === get_option( 'woocommerce_tax_round_at_subtotal' );
+
+		foreach ( $order_items as $order_item ) {
+			$order_item_id = $order_item->get_id();
+			unset( $existing_items[ $order_item_id ] );
+			$product_qty         = $order_item->get_quantity( 'edit' );
+			$shipping_amount     = $order->get_item_shipping_amount( $order_item );
+			$shipping_tax_amount = $order->get_item_shipping_tax_amount( $order_item );
+			$coupon_amount       = $order->get_item_coupon_amount( $order_item );
+
+			// Skip line items without changes to product quantity.
+			if ( ! $product_qty ) {
+				$num_updated++;
+				continue;
+			}
+
+			// Tax amount.
+			$tax_amount  = 0;
+			$order_taxes = $order->get_taxes();
+			$tax_data    = $order_item->get_taxes();
+			foreach ( $order_taxes as $tax_item ) {
+				$tax_item_id = $tax_item->get_rate_id();
+				$tax_amount += isset( $tax_data['total'][ $tax_item_id ] ) ? (float) $tax_data['total'][ $tax_item_id ] : 0;
+			}
+
+			$net_revenue = round( $order_item->get_total( 'edit' ), $decimals );
+			if ( $round_tax ) {
+				$tax_amount = round( $tax_amount, $decimals );
+			}
+
+			$result = $wpdb->replace(
+				self::get_db_table_name(),
+				array(
+					'order_item_id'         => $order_item_id,
+					'order_id'              => $order->get_id(),
+					'product_id'            => wc_get_order_item_meta( $order_item_id, '_product_id' ),
+					'variation_id'          => wc_get_order_item_meta( $order_item_id, '_variation_id' ),
+					'customer_id'           => $order->get_report_customer_id(),
+					'product_qty'           => $product_qty,
+					'product_net_revenue'   => $net_revenue,
+					'date_created'          => $order->get_date_created( 'edit' )->date( TimeInterval::$sql_datetime_format ),
+					'coupon_amount'         => $coupon_amount,
+					'tax_amount'            => $tax_amount,
+					'shipping_amount'       => $shipping_amount,
+					'shipping_tax_amount'   => $shipping_tax_amount,
+					// @todo Can this be incorrect if modified by filters?
+					'product_gross_revenue' => $net_revenue + $tax_amount + $shipping_amount + $shipping_tax_amount,
+				),
+				array(
+					'%d', // order_item_id.
+					'%d', // order_id.
+					'%d', // product_id.
+					'%d', // variation_id.
+					'%d', // customer_id.
+					'%d', // product_qty.
+					'%f', // product_net_revenue.
+					'%s', // date_created.
+					'%f', // coupon_amount.
+					'%f', // tax_amount.
+					'%f', // shipping_amount.
+					'%f', // shipping_tax_amount.
+					'%f', // product_gross_revenue.
+				)
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			/**
+			 * Fires when product's reports are updated.
+			 *
+			 * @param int $order_item_id Order Item ID.
+			 * @param int $order_id      Order ID.
+			 */
+			do_action( 'woocommerce_analytics_update_product', $order_item_id, $order->get_id() );
+
+			// Sum the rows affected. Using REPLACE can affect 2 rows if the row already exists.
+			$num_updated += 2 === intval( $result ) ? 1 : intval( $result );
+		}
+
+		if ( ! empty( $existing_items ) ) {
+			$existing_items = array_flip( $existing_items );
+			$format         = array_fill( 0, count( $existing_items ), '%d' );
+			$format         = implode( ',', $format );
+			array_unshift( $existing_items, $order_id );
+			$wpdb->query(
+				$wpdb->prepare(
+					// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared, WordPress.DB.PreparedSQL.InterpolatedNotPrepared
+					"DELETE FROM {$table_name} WHERE order_id = %d AND order_item_id in ({$format})",
+					$existing_items
+				)
+			);
+		}
+
+		return ( count( $order_items ) === $num_updated );
+	}
+
+	/**
+	 * Clean products data when an order is deleted.
+	 *
+	 * @param int $order_id Order ID.
+	 */
+	public static function sync_on_order_delete( $order_id ) {
+		global $wpdb;
+
+		$wpdb->delete( self::get_db_table_name(), array( 'order_id' => $order_id ) );
+
+		/**
+		 * Fires when product's reports are removed from database.
+		 *
+		 * @param int $product_id Product ID.
+		 * @param int $order_id   Order ID.
+		 */
+		do_action( 'woocommerce_analytics_delete_product', 0, $order_id );
+
+		ReportsCache::invalidate();
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'select', 'product_id' );
+		$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->subquery->add_sql_clause( 'group_by', 'product_id' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Products/Query.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Class for parameter-based Products Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'page'         => 2,
+ *          'categories'   => array(15, 18),
+ *          'products'     => array(1,2,3)
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Products\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Products;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Products\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Products report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_products_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-products' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_products_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Products/Stats/Controller.php

@@ -0,0 +1,429 @@
+<?php
+/**
+ * REST API Reports products stats controller
+ *
+ * Handles requests to the /reports/products/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Products\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * REST API Reports products stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/products/stats';
+
+	/**
+	 * Mapping between external parameter name and name used in query class.
+	 *
+	 * @var array
+	 */
+	protected $param_mapping = array(
+		'categories' => 'category_includes',
+		'products'   => 'product_includes',
+		'variations' => 'variation_includes',
+	);
+
+	/**
+	 * Constructor.
+	 */
+	public function __construct() {
+		add_filter( 'woocommerce_analytics_products_stats_select_query', array( $this, 'set_default_report_data' ) );
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args = array(
+			'fields' => array(
+				'items_sold',
+				'net_revenue',
+				'orders_count',
+				'products_count',
+				'variations_count',
+			),
+		);
+
+		$registered = array_keys( $this->get_collection_params() );
+		foreach ( $registered as $param_name ) {
+			if ( isset( $request[ $param_name ] ) ) {
+				if ( isset( $this->param_mapping[ $param_name ] ) ) {
+					$query_args[ $this->param_mapping[ $param_name ] ] = $request[ $param_name ];
+				} else {
+					$query_args[ $param_name ] = $request[ $param_name ];
+				}
+			}
+		}
+
+		$query = new Query( $query_args );
+		try {
+			$report_data = $query->get_data();
+		} catch ( ParameterException $e ) {
+			return new \WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
+		}
+
+		$out_data = array(
+			'totals'    => get_object_vars( $report_data->totals ),
+			'intervals' => array(),
+		);
+
+		foreach ( $report_data->intervals as $interval_data ) {
+			$item                    = $this->prepare_item_for_response( $interval_data, $request );
+			$out_data['intervals'][] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_products_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$data_values = array(
+			'items_sold'   => array(
+				'title'       => __( 'Products sold', 'woocommerce' ),
+				'description' => __( 'Number of product items sold.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+			),
+			'net_revenue'  => array(
+				'description' => __( 'Net sales.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'format'      => 'currency',
+			),
+			'orders_count' => array(
+				'description' => __( 'Number of orders.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+		);
+
+		$segments = array(
+			'segments' => array(
+				'description' => __( 'Reports data grouped by segment condition.', 'woocommerce' ),
+				'type'        => 'array',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'items'       => array(
+					'type'       => 'object',
+					'properties' => array(
+						'segment_id'    => array(
+							'description' => __( 'Segment identificator.', 'woocommerce' ),
+							'type'        => 'integer',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+						),
+						'segment_label' => array(
+							'description' => __( 'Human readable segment label, either product or variation name.', 'woocommerce' ),
+							'type'        => 'string',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'enum'        => array( 'day', 'week', 'month', 'year' ),
+						),
+						'subtotals'     => array(
+							'description' => __( 'Interval subtotals.', 'woocommerce' ),
+							'type'        => 'object',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'properties'  => $data_values,
+						),
+					),
+				),
+			),
+		);
+
+		$totals = array_merge( $data_values, $segments );
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_products_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals'    => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+				'intervals' => array(
+					'description' => __( 'Reports data grouped by intervals.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'object',
+						'properties' => array(
+							'interval'       => array(
+								'description' => __( 'Type of interval.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'enum'        => array( 'day', 'week', 'month', 'year' ),
+							),
+							'date_start'     => array(
+								'description' => __( "The date the report start, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_start_gmt' => array(
+								'description' => __( 'The date the report start, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end'       => array(
+								'description' => __( "The date the report end, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end_gmt'   => array(
+								'description' => __( 'The date the report end, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'subtotals'      => array(
+								'description' => __( 'Interval subtotals.', 'woocommerce' ),
+								'type'        => 'object',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'properties'  => $totals,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Set the default results to 0 if API returns an empty array
+	 *
+	 * @param Mixed $results Report data.
+	 * @return object
+	 */
+	public function set_default_report_data( $results ) {
+		if ( empty( $results ) ) {
+			$results                       = new \stdClass();
+			$results->total                = 0;
+			$results->totals               = new \stdClass();
+			$results->totals->items_sold   = 0;
+			$results->totals->net_revenue  = 0;
+			$results->totals->orders_count = 0;
+			$results->intervals            = array();
+			$results->pages                = 1;
+			$results->page_no              = 1;
+		}
+		return $results;
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params               = array();
+		$params['context']    = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']       = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']   = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']      = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']     = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']      = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']    = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'net_revenue',
+				'coupons',
+				'refunds',
+				'shipping',
+				'taxes',
+				'net_revenue',
+				'orders_count',
+				'items_sold',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']   = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['categories'] = array(
+			'description'       => __( 'Limit result to items from the specified categories.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['products']   = array(
+			'description'       => __( 'Limit result to items with specified product ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['variations'] = array(
+			'description'       => __( 'Limit result to items with specified variation ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['segmentby']  = array(
+			'description'       => __( 'Segment the response by additional constraint.', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'product',
+				'category',
+				'variation',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['fields']     = array(
+			'description'       => __( 'Limit stats fields to the specified items.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Products/Stats/DataStore.php

@@ -0,0 +1,258 @@
+<?php
+/**
+ * API\Reports\Products\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Products\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Products\DataStore as ProductsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Products\Stats\DataStore.
+ */
+class DataStore extends ProductsDataStore implements DataStoreInterface {
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'date_start'       => 'strval',
+		'date_end'         => 'strval',
+		'product_id'       => 'intval',
+		'items_sold'       => 'intval',
+		'net_revenue'      => 'floatval',
+		'orders_count'     => 'intval',
+		'products_count'   => 'intval',
+		'variations_count' => 'intval',
+	);
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'products_stats';
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'products_stats';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'items_sold'       => 'SUM(product_qty) as items_sold',
+			'net_revenue'      => 'SUM(product_net_revenue) AS net_revenue',
+			'orders_count'     => "COUNT( DISTINCT ( CASE WHEN product_gross_revenue >= 0 THEN {$table_name}.order_id END ) ) as orders_count",
+			'products_count'   => 'COUNT(DISTINCT product_id) as products_count',
+			'variations_count' => 'COUNT(DISTINCT variation_id) as variations_count',
+		);
+	}
+
+	/**
+	 * Updates the database query with parameters used for Products Stats report: categories and order status.
+	 *
+	 * @param array $query_args       Query arguments supplied by the user.
+	 */
+	protected function update_sql_query_params( $query_args ) {
+		global $wpdb;
+
+		$products_where_clause      = '';
+		$products_from_clause       = '';
+		$order_product_lookup_table = self::get_db_table_name();
+
+		$included_products = $this->get_included_products( $query_args );
+		if ( $included_products ) {
+			$products_where_clause .= " AND {$order_product_lookup_table}.product_id IN ({$included_products})";
+		}
+
+		$included_variations = $this->get_included_variations( $query_args );
+		if ( $included_variations ) {
+			$products_where_clause .= " AND {$order_product_lookup_table}.variation_id IN ({$included_variations})";
+		}
+
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		if ( $order_status_filter ) {
+			$products_from_clause  .= " JOIN {$wpdb->prefix}wc_order_stats ON {$order_product_lookup_table}.order_id = {$wpdb->prefix}wc_order_stats.order_id";
+			$products_where_clause .= " AND ( {$order_status_filter} )";
+		}
+
+		$this->add_time_period_sql_params( $query_args, $order_product_lookup_table );
+		$this->total_query->add_sql_clause( 'where', $products_where_clause );
+		$this->total_query->add_sql_clause( 'join', $products_from_clause );
+
+		$this->add_intervals_sql_params( $query_args, $order_product_lookup_table );
+		$this->interval_query->add_sql_clause( 'where', $products_where_clause );
+		$this->interval_query->add_sql_clause( 'join', $products_from_clause );
+		$this->interval_query->add_sql_clause( 'select', $this->get_sql_clause( 'select' ) . ' AS time_interval' );
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @since 3.5.0
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'          => get_option( 'posts_per_page' ),
+			'page'              => 1,
+			'order'             => 'DESC',
+			'orderby'           => 'date',
+			'before'            => TimeInterval::default_before(),
+			'after'             => TimeInterval::default_after(),
+			'fields'            => '*',
+			'category_includes' => array(),
+			'interval'          => 'week',
+			'product_includes'  => array(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$selections = $this->selected_columns( $query_args );
+			$params     = $this->get_limit_params( $query_args );
+
+			$this->update_sql_query_params( $query_args );
+			$this->get_limit_sql_params( $query_args );
+			$this->interval_query->add_sql_clause( 'where_time', $this->get_sql_clause( 'where_time' ) );
+
+			$db_intervals = $wpdb->get_col(
+				$this->interval_query->get_query_statement()
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			$db_interval_count       = count( $db_intervals );
+			$expected_interval_count = TimeInterval::intervals_between( $query_args['after'], $query_args['before'], $query_args['interval'] );
+			$total_pages             = (int) ceil( $expected_interval_count / $params['per_page'] );
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return array();
+			}
+
+			$intervals = array();
+			$this->update_intervals_sql_params( $query_args, $db_interval_count, $expected_interval_count, $table_name );
+			$this->total_query->add_sql_clause( 'select', $selections );
+			$this->total_query->add_sql_clause( 'where_time', $this->get_sql_clause( 'where_time' ) );
+
+			$totals = $wpdb->get_results(
+				$this->total_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			// @todo remove these assignements when refactoring segmenter classes to use query objects.
+			$totals_query          = array(
+				'from_clause'       => $this->total_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->total_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->total_query->get_sql_clause( 'where' ),
+			);
+			$intervals_query       = array(
+				'select_clause'     => $this->get_sql_clause( 'select' ),
+				'from_clause'       => $this->interval_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->interval_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->interval_query->get_sql_clause( 'where' ),
+				'order_by'          => $this->get_sql_clause( 'order_by' ),
+				'limit'             => $this->get_sql_clause( 'limit' ),
+			);
+			$segmenter             = new Segmenter( $query_args, $this->report_columns );
+			$totals[0]['segments'] = $segmenter->get_totals_segments( $totals_query, $table_name );
+
+			if ( null === $totals ) {
+				return new \WP_Error( 'woocommerce_analytics_products_stats_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ) );
+			}
+
+			$this->interval_query->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->interval_query->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+			$this->interval_query->add_sql_clause( 'select', ", MAX(${table_name}.date_created) AS datetime_anchor" );
+			if ( '' !== $selections ) {
+				$this->interval_query->add_sql_clause( 'select', ', ' . $selections );
+			}
+
+			$intervals = $wpdb->get_results(
+				$this->interval_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $intervals ) {
+				return new \WP_Error( 'woocommerce_analytics_products_stats_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ) );
+			}
+
+			$totals = (object) $this->cast_numbers( $totals[0] );
+
+			$data = (object) array(
+				'totals'    => $totals,
+				'intervals' => $intervals,
+				'total'     => $expected_interval_count,
+				'pages'     => $total_pages,
+				'page_no'   => (int) $query_args['page'],
+			);
+
+			if ( TimeInterval::intervals_missing( $expected_interval_count, $db_interval_count, $params['per_page'], $query_args['page'], $query_args['order'], $query_args['orderby'], count( $intervals ) ) ) {
+				$this->fill_in_missing_intervals( $db_intervals, $query_args['adj_after'], $query_args['adj_before'], $query_args['interval'], $data );
+				$this->sort_intervals( $data, $query_args['orderby'], $query_args['order'] );
+				$this->remove_extra_records( $data, $query_args['page'], $params['per_page'], $db_interval_count, $expected_interval_count, $query_args['orderby'], $query_args['order'] );
+			} else {
+				$this->update_interval_boundary_dates( $query_args['after'], $query_args['before'], $query_args['interval'], $data->intervals );
+			}
+			$segmenter->add_intervals_segments( $data, $intervals_query, $table_name );
+			$this->create_interval_subtotals( $data->intervals );
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Normalizes order_by clause to match to SQL query.
+	 *
+	 * @param string $order_by Order by option requeste by user.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return 'time_interval';
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		unset( $this->subquery );
+		$this->total_query = new SqlQuery( $this->context . '_total' );
+		$this->total_query->add_sql_clause( 'from', self::get_db_table_name() );
+
+		$this->interval_query = new SqlQuery( $this->context . '_interval' );
+		$this->interval_query->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->interval_query->add_sql_clause( 'group_by', 'time_interval' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Products/Stats/Query.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * Class for parameter-based Products Stats Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'page'         => 2,
+ *          'categories'   => array(15, 18),
+ *          'product_ids'  => array(1,2,3)
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Products\Stats\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Products\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Products\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Products report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_products_stats_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-products-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_products_stats_select_query', $results, $args );
+	}
+
+}

packages/woocommerce-admin/src/API/Reports/Products/Stats/Segmenter.php

@@ -0,0 +1,209 @@
+<?php
+/**
+ * Class for adding segmenting support without cluttering the data stores.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Products\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Segmenter as ReportsSegmenter;
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * Date & time interval and numeric range handling class for Reporting API.
+ */
+class Segmenter extends ReportsSegmenter {
+
+	/**
+	 * Returns column => query mapping to be used for product-related product-level segmenting query
+	 * (e.g. products sold, revenue from product X when segmenting by category).
+	 *
+	 * @param string $products_table Name of SQL table containing the product-level segmenting info.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function get_segment_selections_product_level( $products_table ) {
+		$columns_mapping = array(
+			'items_sold'       => "SUM($products_table.product_qty) as items_sold",
+			'net_revenue'      => "SUM($products_table.product_net_revenue ) AS net_revenue",
+			'orders_count'     => "COUNT( DISTINCT $products_table.order_id ) AS orders_count",
+			'products_count'   => "COUNT( DISTINCT $products_table.product_id ) AS products_count",
+			'variations_count' => "COUNT( DISTINCT $products_table.variation_id ) AS variations_count",
+		);
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Calculate segments for totals where the segmenting property is bound to product (e.g. category, product_id, variation_id).
+	 *
+	 * @param array  $segmenting_selections SELECT part of segmenting SQL query--one for 'product_level' and one for 'order_level'.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $segmenting_dimension_name Name of the segmenting dimension.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $totals_query Array of SQL clauses for totals query.
+	 * @param string $unique_orders_table Name of temporary SQL table that holds unique orders.
+	 *
+	 * @return array
+	 */
+	protected function get_product_related_totals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $totals_query, $unique_orders_table ) {
+		global $wpdb;
+
+		$product_segmenting_table = $wpdb->prefix . 'wc_order_product_lookup';
+
+		// Can't get all the numbers from one query, so split it into one query for product-level numbers and one for order-level numbers (which first need to have orders uniqued).
+		// Product-level numbers.
+		$segments_products = $wpdb->get_results(
+			"SELECT
+						$segmenting_groupby AS $segmenting_dimension_name
+						{$segmenting_selections['product_level']}
+					FROM
+						$table_name
+						$segmenting_from
+						{$totals_query['from_clause']}
+					WHERE
+						1=1
+						{$totals_query['where_time_clause']}
+						{$totals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						$segmenting_groupby",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		$totals_segments = $this->merge_segment_totals_results( $segmenting_dimension_name, $segments_products, array() );
+		return $totals_segments;
+	}
+
+	/**
+	 * Calculate segments for intervals where the segmenting property is bound to product (e.g. category, product_id, variation_id).
+	 *
+	 * @param array  $segmenting_selections SELECT part of segmenting SQL query--one for 'product_level' and one for 'order_level'.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $segmenting_dimension_name Name of the segmenting dimension.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $intervals_query Array of SQL clauses for intervals query.
+	 * @param string $unique_orders_table Name of temporary SQL table that holds unique orders.
+	 *
+	 * @return array
+	 */
+	protected function get_product_related_intervals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $intervals_query, $unique_orders_table ) {
+		global $wpdb;
+
+		$product_segmenting_table = $wpdb->prefix . 'wc_order_product_lookup';
+
+		// LIMIT offset, rowcount needs to be updated to a multiple of the number of segments.
+		preg_match( '/LIMIT (\d+)\s?,\s?(\d+)/', $intervals_query['limit'], $limit_parts );
+		$segment_count    = count( $this->get_all_segments() );
+		$orig_offset      = intval( $limit_parts[1] );
+		$orig_rowcount    = intval( $limit_parts[2] );
+		$segmenting_limit = $wpdb->prepare( 'LIMIT %d, %d', $orig_offset * $segment_count, $orig_rowcount * $segment_count );
+
+		// Can't get all the numbers from one query, so split it into one query for product-level numbers and one for order-level numbers (which first need to have orders uniqued).
+		// Product-level numbers.
+		$segments_products = $wpdb->get_results(
+			"SELECT
+						{$intervals_query['select_clause']} AS time_interval,
+						$segmenting_groupby AS $segmenting_dimension_name
+						{$segmenting_selections['product_level']}
+					FROM
+						$table_name
+						$segmenting_from
+						{$intervals_query['from_clause']}
+					WHERE
+						1=1
+						{$intervals_query['where_time_clause']}
+						{$intervals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						time_interval, $segmenting_groupby
+					$segmenting_limit",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		$intervals_segments = $this->merge_segment_intervals_results( $segmenting_dimension_name, $segments_products, array() );
+		return $intervals_segments;
+	}
+
+	/**
+	 * Return array of segments formatted for REST response.
+	 *
+	 * @param string $type Type of segments to return--'totals' or 'intervals'.
+	 * @param array  $query_params SQL query parameter array.
+	 * @param string $table_name Name of main SQL table for the data store (used as basis for JOINS).
+	 *
+	 * @return array
+	 * @throws \Automattic\WooCommerce\Admin\API\Reports\ParameterException In case of segmenting by variations, when no parent product is specified.
+	 */
+	protected function get_segments( $type, $query_params, $table_name ) {
+		global $wpdb;
+		if ( ! isset( $this->query_args['segmentby'] ) || '' === $this->query_args['segmentby'] ) {
+			return array();
+		}
+
+		$product_segmenting_table = $wpdb->prefix . 'wc_order_product_lookup';
+		$unique_orders_table      = 'uniq_orders';
+		$segmenting_where         = '';
+
+		// Product, variation, and category are bound to product, so here product segmenting table is required,
+		// while coupon and customer are bound to order, so we don't need the extra JOIN for those.
+		// This also means that segment selections need to be calculated differently.
+		if ( 'product' === $this->query_args['segmentby'] ) {
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+			);
+			$this->report_columns      = $product_level_columns;
+			$segmenting_from           = '';
+			$segmenting_groupby        = $product_segmenting_table . '.product_id';
+			$segmenting_dimension_name = 'product_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'variation' === $this->query_args['segmentby'] ) {
+			if ( ! isset( $this->query_args['product_includes'] ) || count( $this->query_args['product_includes'] ) !== 1 ) {
+				throw new ParameterException( 'wc_admin_reports_invalid_segmenting_variation', __( 'product_includes parameter need to specify exactly one product when segmenting by variation.', 'woocommerce' ) );
+			}
+
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+			);
+			$this->report_columns      = $product_level_columns;
+			$segmenting_from           = '';
+			$segmenting_where          = "AND $product_segmenting_table.product_id = {$this->query_args['product_includes'][0]}";
+			$segmenting_groupby        = $product_segmenting_table . '.variation_id';
+			$segmenting_dimension_name = 'variation_id';
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'category' === $this->query_args['segmentby'] ) {
+			$product_level_columns     = $this->get_segment_selections_product_level( $product_segmenting_table );
+			$segmenting_selections     = array(
+				'product_level' => $this->prepare_selections( $product_level_columns ),
+			);
+			$this->report_columns      = $product_level_columns;
+			$segmenting_from           = "
+			LEFT JOIN {$wpdb->term_relationships} ON {$product_segmenting_table}.product_id = {$wpdb->term_relationships}.object_id
+			JOIN {$wpdb->term_taxonomy} ON {$wpdb->term_taxonomy}.term_taxonomy_id = {$wpdb->term_relationships}.term_taxonomy_id
+			LEFT JOIN {$wpdb->wc_category_lookup} ON {$wpdb->term_taxonomy}.term_id = {$wpdb->wc_category_lookup}.category_id
+			";
+			$segmenting_where          = " AND {$wpdb->wc_category_lookup}.category_tree_id IS NOT NULL";
+			$segmenting_groupby        = "{$wpdb->wc_category_lookup}.category_tree_id";
+			$segmenting_dimension_name = 'category_id';
+
+			// Restrict our search space for category comparisons.
+			if ( isset( $this->query_args['category_includes'] ) ) {
+				$category_ids      = implode( ',', $this->get_all_segments() );
+				$segmenting_where .= " AND {$wpdb->wc_category_lookup}.category_id IN ( $category_ids )";
+			}
+
+			$segments = $this->get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		}
+
+		return $segments;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Query.php

@@ -0,0 +1,24 @@
+<?php
+/**
+ * Class for parameter-based Reports querying
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Admin\API\Reports\Query
+ */
+abstract class Query extends \WC_Object_Query {
+
+	/**
+	 * Get report data matching the current query vars.
+	 *
+	 * @return array|object of WC_Product objects
+	 */
+	public function get_data() {
+		/* translators: %s: Method name */
+		return new \WP_Error( 'invalid-method', sprintf( __( "Method '%s' not implemented. Must be overridden in subclass.", 'woocommerce' ), __METHOD__ ), array( 'status' => 405 ) );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Revenue/Query.php

@@ -0,0 +1,67 @@
+<?php
+/**
+ * Class for parameter-based Revenue Reports querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before' => '2018-07-19 00:00:00',
+ *          'after'  => '2018-07-05 00:00:00',
+ *          'interval' => 'week',
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Revenue\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Revenue;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Revenue\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Revenue report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array(
+			'per_page' => get_option( 'posts_per_page' ), // not sure if this should be the default.
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'date',
+			'before'   => '',
+			'after'    => '',
+			'interval' => 'week',
+			'fields'   => array(
+				'orders_count',
+				'num_items_sold',
+				'total_sales',
+				'coupons',
+				'coupons_count',
+				'refunds',
+				'taxes',
+				'shipping',
+				'net_revenue',
+				'gross_sales',
+			),
+		);
+	}
+
+	/**
+	 * Get revenue data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_revenue_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-revenue-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_revenue_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Revenue/Stats/Controller.php

@@ -0,0 +1,481 @@
+<?php
+/**
+ * REST API Reports revenue stats controller
+ *
+ * Handles requests to the /reports/revenue/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Revenue\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Revenue\Query as RevenueQuery;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableTraits;
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * REST API Reports revenue stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller implements ExportableInterface {
+	/**
+	 * Exportable traits.
+	 */
+	use ExportableTraits;
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/revenue/stats';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args              = array();
+		$args['before']    = $request['before'];
+		$args['after']     = $request['after'];
+		$args['interval']  = $request['interval'];
+		$args['page']      = $request['page'];
+		$args['per_page']  = $request['per_page'];
+		$args['orderby']   = $request['orderby'];
+		$args['order']     = $request['order'];
+		$args['segmentby'] = $request['segmentby'];
+		$args['fields']    = $request['fields'];
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args      = $this->prepare_reports_query( $request );
+		$reports_revenue = new RevenueQuery( $query_args );
+		try {
+			$report_data = $reports_revenue->get_data();
+		} catch ( ParameterException $e ) {
+			return new \WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
+		}
+
+		$out_data = array(
+			'totals'    => get_object_vars( $report_data->totals ),
+			'intervals' => array(),
+		);
+
+		foreach ( $report_data->intervals as $interval_data ) {
+			$item                    = $this->prepare_item_for_response( $interval_data, $request );
+			$out_data['intervals'][] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Get report items for export.
+	 *
+	 * Returns only the interval data.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return WP_REST_Response
+	 */
+	public function get_export_items( $request ) {
+		$response  = $this->get_items( $request );
+		$data      = $response->get_data();
+		$intervals = $data['intervals'];
+
+		$response->set_data( $intervals );
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_revenue_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$data_values = array(
+			'total_sales'    => array(
+				'description' => __( 'Total sales.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'net_revenue'    => array(
+				'description' => __( 'Net sales.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'coupons'        => array(
+				'description' => __( 'Amount discounted by coupons.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'coupons_count'  => array(
+				'description' => __( 'Unique coupons count.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'format'      => 'currency',
+			),
+			'shipping'       => array(
+				'title'       => __( 'Shipping', 'woocommerce' ),
+				'description' => __( 'Total of shipping.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'taxes'          => array(
+				'description' => __( 'Total of taxes.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'format'      => 'currency',
+			),
+			'refunds'        => array(
+				'title'       => __( 'Returns', 'woocommerce' ),
+				'description' => __( 'Total of returns.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'orders_count'   => array(
+				'description' => __( 'Number of orders.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'num_items_sold' => array(
+				'description' => __( 'Items sold.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'products'       => array(
+				'description' => __( 'Products sold.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'gross_sales'    => array(
+				'description' => __( 'Gross sales.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+		);
+
+		$segments = array(
+			'segments' => array(
+				'description' => __( 'Reports data grouped by segment condition.', 'woocommerce' ),
+				'type'        => 'array',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'items'       => array(
+					'type'       => 'object',
+					'properties' => array(
+						'segment_id' => array(
+							'description' => __( 'Segment identificator.', 'woocommerce' ),
+							'type'        => 'integer',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+						),
+						'subtotals'  => array(
+							'description' => __( 'Interval subtotals.', 'woocommerce' ),
+							'type'        => 'object',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'properties'  => $data_values,
+						),
+					),
+				),
+			),
+		);
+
+		$totals = array_merge( $data_values, $segments );
+
+		// Products is not shown in intervals.
+		unset( $data_values['products'] );
+
+		$intervals = array_merge( $data_values, $segments );
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_revenue_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals'    => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+				'intervals' => array(
+					'description' => __( 'Reports data grouped by intervals.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'object',
+						'properties' => array(
+							'interval'       => array(
+								'description' => __( 'Type of interval.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'enum'        => array( 'day', 'week', 'month', 'year' ),
+							),
+							'date_start'     => array(
+								'description' => __( "The date the report start, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_start_gmt' => array(
+								'description' => __( 'The date the report start, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end'       => array(
+								'description' => __( "The date the report end, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end_gmt'   => array(
+								'description' => __( 'The date the report end, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'subtotals'      => array(
+								'description' => __( 'Interval subtotals.', 'woocommerce' ),
+								'type'        => 'object',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'properties'  => $intervals,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params              = array();
+		$params['context']   = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']      = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']  = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']     = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']    = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']     = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']   = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'total_sales',
+				'coupons',
+				'refunds',
+				'shipping',
+				'taxes',
+				'net_revenue',
+				'orders_count',
+				'items_sold',
+				'gross_sales',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']  = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['segmentby'] = array(
+			'description'       => __( 'Segment the response by additional constraint.', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'product',
+				'category',
+				'variation',
+				'coupon',
+				'customer_type', // new vs returning.
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		return array(
+			'date'         => __( 'Date', 'woocommerce' ),
+			'orders_count' => __( 'Orders', 'woocommerce' ),
+			'gross_sales'  => __( 'Gross sales', 'woocommerce' ),
+			'total_sales'  => __( 'Total sales', 'woocommerce' ),
+			'refunds'      => __( 'Returns', 'woocommerce' ),
+			'coupons'      => __( 'Coupons', 'woocommerce' ),
+			'taxes'        => __( 'Taxes', 'woocommerce' ),
+			'shipping'     => __( 'Shipping', 'woocommerce' ),
+			'net_revenue'  => __( 'Net Revenue', 'woocommerce' ),
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$subtotals = (array) $item['subtotals'];
+
+		return array(
+			'date'         => $item['date_start'],
+			'orders_count' => $subtotals['orders_count'],
+			'gross_sales'  => self::csv_number_format( $subtotals['gross_sales'] ),
+			'total_sales'  => self::csv_number_format( $subtotals['total_sales'] ),
+			'refunds'      => self::csv_number_format( $subtotals['refunds'] ),
+			'coupons'      => self::csv_number_format( $subtotals['coupons'] ),
+			'taxes'        => self::csv_number_format( $subtotals['taxes'] ),
+			'shipping'     => self::csv_number_format( $subtotals['shipping'] ),
+			'net_revenue'  => self::csv_number_format( $subtotals['net_revenue'] ),
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Segmenter.php

@@ -0,0 +1,642 @@
+<?php
+/**
+ * Class for adding segmenting support without cluttering the data stores.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Coupons\DataStore as CouponsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats\DataStore as TaxesStatsDataStore;
+
+/**
+ * Date & time interval and numeric range handling class for Reporting API.
+ */
+class Segmenter {
+
+	/**
+	 * Array of all segment ids.
+	 *
+	 * @var array|bool
+	 */
+	protected $all_segment_ids = false;
+
+	/**
+	 * Array of all segment labels.
+	 *
+	 * @var array
+	 */
+	protected $segment_labels = array();
+
+	/**
+	 * Query arguments supplied by the user for data store.
+	 *
+	 * @var array
+	 */
+	protected $query_args = '';
+
+	/**
+	 * SQL definition for each column.
+	 *
+	 * @var array
+	 */
+	protected $report_columns = array();
+
+	/**
+	 * Constructor.
+	 *
+	 * @param array $query_args Query arguments supplied by the user for data store.
+	 * @param array $report_columns Report columns lookup from data store.
+	 */
+	public function __construct( $query_args, $report_columns ) {
+		$this->query_args     = $query_args;
+		$this->report_columns = $report_columns;
+	}
+
+	/**
+	 * Filters definitions for SELECT clauses based on query_args and joins them into one string usable in SELECT clause.
+	 *
+	 * @param array $columns_mapping Column name -> SQL statememt mapping.
+	 *
+	 * @return string to be used in SELECT clause statements.
+	 */
+	protected function prepare_selections( $columns_mapping ) {
+		if ( isset( $this->query_args['fields'] ) && is_array( $this->query_args['fields'] ) ) {
+			$keep = array();
+			foreach ( $this->query_args['fields'] as $field ) {
+				if ( isset( $columns_mapping[ $field ] ) ) {
+					$keep[ $field ] = $columns_mapping[ $field ];
+				}
+			}
+			$selections = implode( ', ', $keep );
+		} else {
+			$selections = implode( ', ', $columns_mapping );
+		}
+
+		if ( $selections ) {
+			$selections = ',' . $selections;
+		}
+
+		return $selections;
+	}
+
+	/**
+	 * Update row-level db result for segments in 'totals' section to the format used for output.
+	 *
+	 * @param array  $segments_db_result Results from the SQL db query for segmenting.
+	 * @param string $segment_dimension Name of column used for grouping the result.
+	 *
+	 * @return array Reformatted array.
+	 */
+	protected function reformat_totals_segments( $segments_db_result, $segment_dimension ) {
+		$segment_result = array();
+
+		if ( strpos( $segment_dimension, '.' ) ) {
+			$segment_dimension = substr( strstr( $segment_dimension, '.' ), 1 );
+		}
+
+		$segment_labels = $this->get_segment_labels();
+		foreach ( $segments_db_result as $segment_data ) {
+			$segment_id = $segment_data[ $segment_dimension ];
+			if ( ! isset( $segment_labels[ $segment_id ] ) ) {
+				continue;
+			}
+
+			unset( $segment_data[ $segment_dimension ] );
+			$segment_datum                 = array(
+				'segment_id'    => $segment_id,
+				'segment_label' => $segment_labels[ $segment_id ],
+				'subtotals'     => $segment_data,
+			);
+			$segment_result[ $segment_id ] = $segment_datum;
+		}
+
+		return $segment_result;
+	}
+
+	/**
+	 * Merges segmented results for totals response part.
+	 *
+	 * E.g. $r1 = array(
+	 *     0 => array(
+	 *          'product_id' => 3,
+	 *          'net_amount' => 15,
+	 *     ),
+	 * );
+	 * $r2 = array(
+	 *     0 => array(
+	 *          'product_id'      => 3,
+	 *          'avg_order_value' => 25,
+	 *     ),
+	 * );
+	 *
+	 * $merged = array(
+	 *     3 => array(
+	 *          'segment_id' => 3,
+	 *          'subtotals'  => array(
+	 *              'net_amount'      => 15,
+	 *              'avg_order_value' => 25,
+	 *          )
+	 *     ),
+	 * );
+	 *
+	 * @param string $segment_dimension Name of the segment dimension=key in the result arrays used to match records from result sets.
+	 * @param array  $result1 Array 1 of segmented figures.
+	 * @param array  $result2 Array 2 of segmented figures.
+	 *
+	 * @return array
+	 */
+	protected function merge_segment_totals_results( $segment_dimension, $result1, $result2 ) {
+		$result_segments = array();
+		$segment_labels  = $this->get_segment_labels();
+
+		foreach ( $result1 as $segment_data ) {
+			$segment_id = $segment_data[ $segment_dimension ];
+			if ( ! isset( $segment_labels[ $segment_id ] ) ) {
+				continue;
+			}
+
+			unset( $segment_data[ $segment_dimension ] );
+			$result_segments[ $segment_id ] = array(
+				'segment_label' => $segment_labels[ $segment_id ],
+				'segment_id'    => $segment_id,
+				'subtotals'     => $segment_data,
+			);
+		}
+
+		foreach ( $result2 as $segment_data ) {
+			$segment_id = $segment_data[ $segment_dimension ];
+			if ( ! isset( $segment_labels[ $segment_id ] ) ) {
+				continue;
+			}
+
+			unset( $segment_data[ $segment_dimension ] );
+			if ( ! isset( $result_segments[ $segment_id ] ) ) {
+				$result_segments[ $segment_id ] = array(
+					'segment_label' => $segment_labels[ $segment_id ],
+					'segment_id'    => $segment_id,
+					'subtotals'     => array(),
+				);
+			}
+			$result_segments[ $segment_id ]['subtotals'] = array_merge( $result_segments[ $segment_id ]['subtotals'], $segment_data );
+		}
+		return $result_segments;
+	}
+	/**
+	 * Merges segmented results for intervals response part.
+	 *
+	 * E.g. $r1 = array(
+	 *     0 => array(
+	 *          'product_id'    => 3,
+	 *          'time_interval' => '2018-12'
+	 *          'net_amount'    => 15,
+	 *     ),
+	 * );
+	 * $r2 = array(
+	 *     0 => array(
+	 *          'product_id'      => 3,
+	 *          'time_interval' => '2018-12'
+	 *          'avg_order_value' => 25,
+	 *     ),
+	 * );
+	 *
+	 * $merged = array(
+	 *     '2018-12' => array(
+	 *          'segments' => array(
+	 *              3 => array(
+	 *                  'segment_id' => 3,
+	 *                  'subtotals'  => array(
+	 *                      'net_amount'      => 15,
+	 *                      'avg_order_value' => 25,
+	 *                  ),
+	 *              ),
+	 *          ),
+	 *     ),
+	 * );
+	 *
+	 * @param string $segment_dimension Name of the segment dimension=key in the result arrays used to match records from result sets.
+	 * @param array  $result1 Array 1 of segmented figures.
+	 * @param array  $result2 Array 2 of segmented figures.
+	 *
+	 * @return array
+	 */
+	protected function merge_segment_intervals_results( $segment_dimension, $result1, $result2 ) {
+		$result_segments = array();
+		$segment_labels  = $this->get_segment_labels();
+
+		foreach ( $result1 as $segment_data ) {
+			$segment_id = $segment_data[ $segment_dimension ];
+			if ( ! isset( $segment_labels[ $segment_id ] ) ) {
+				continue;
+			}
+
+			$time_interval = $segment_data['time_interval'];
+			if ( ! isset( $result_segments[ $time_interval ] ) ) {
+				$result_segments[ $time_interval ]             = array();
+				$result_segments[ $time_interval ]['segments'] = array();
+			}
+
+			unset( $segment_data['time_interval'] );
+			unset( $segment_data['datetime_anchor'] );
+			unset( $segment_data[ $segment_dimension ] );
+			$segment_datum = array(
+				'segment_label' => $segment_labels[ $segment_id ],
+				'segment_id'    => $segment_id,
+				'subtotals'     => $segment_data,
+			);
+			$result_segments[ $time_interval ]['segments'][ $segment_id ] = $segment_datum;
+		}
+
+		foreach ( $result2 as $segment_data ) {
+			$segment_id = $segment_data[ $segment_dimension ];
+			if ( ! isset( $segment_labels[ $segment_id ] ) ) {
+				continue;
+			}
+
+			$time_interval = $segment_data['time_interval'];
+			if ( ! isset( $result_segments[ $time_interval ] ) ) {
+				$result_segments[ $time_interval ]             = array();
+				$result_segments[ $time_interval ]['segments'] = array();
+			}
+
+			unset( $segment_data['time_interval'] );
+			unset( $segment_data['datetime_anchor'] );
+			unset( $segment_data[ $segment_dimension ] );
+
+			if ( ! isset( $result_segments[ $time_interval ]['segments'][ $segment_id ] ) ) {
+				$result_segments[ $time_interval ]['segments'][ $segment_id ] = array(
+					'segment_label' => $segment_labels[ $segment_id ],
+					'segment_id'    => $segment_id,
+					'subtotals'     => array(),
+				);
+			}
+			$result_segments[ $time_interval ]['segments'][ $segment_id ]['subtotals'] = array_merge( $result_segments[ $time_interval ]['segments'][ $segment_id ]['subtotals'], $segment_data );
+		}
+		return $result_segments;
+	}
+
+	/**
+	 * Update row-level db result for segments in 'intervals' section to the format used for output.
+	 *
+	 * @param array  $segments_db_result Results from the SQL db query for segmenting.
+	 * @param string $segment_dimension Name of column used for grouping the result.
+	 *
+	 * @return array Reformatted array.
+	 */
+	protected function reformat_intervals_segments( $segments_db_result, $segment_dimension ) {
+		$aggregated_segment_result = array();
+
+		if ( strpos( $segment_dimension, '.' ) ) {
+			$segment_dimension = substr( strstr( $segment_dimension, '.' ), 1 );
+		}
+
+		$segment_labels = $this->get_segment_labels();
+
+		foreach ( $segments_db_result as $segment_data ) {
+			$segment_id = $segment_data[ $segment_dimension ];
+			if ( ! isset( $segment_labels[ $segment_id ] ) ) {
+				continue;
+			}
+
+			$time_interval = $segment_data['time_interval'];
+			if ( ! isset( $aggregated_segment_result[ $time_interval ] ) ) {
+				$aggregated_segment_result[ $time_interval ]             = array();
+				$aggregated_segment_result[ $time_interval ]['segments'] = array();
+			}
+			unset( $segment_data['time_interval'] );
+			unset( $segment_data['datetime_anchor'] );
+			unset( $segment_data[ $segment_dimension ] );
+			$segment_datum = array(
+				'segment_label' => $segment_labels[ $segment_id ],
+				'segment_id'    => $segment_id,
+				'subtotals'     => $segment_data,
+			);
+			$aggregated_segment_result[ $time_interval ]['segments'][ $segment_id ] = $segment_datum;
+		}
+
+		return $aggregated_segment_result;
+	}
+
+	/**
+	 * Fetches all segment ids from db and stores it for later use.
+	 *
+	 * @return void
+	 */
+	protected function set_all_segments() {
+		global $wpdb;
+
+		if ( ! isset( $this->query_args['segmentby'] ) || '' === $this->query_args['segmentby'] ) {
+			$this->all_segment_ids = array();
+			return;
+		}
+
+		$segments       = array();
+		$segment_labels = array();
+
+		if ( 'product' === $this->query_args['segmentby'] ) {
+			$args = array(
+				'return' => 'objects',
+				'limit'  => -1,
+			);
+
+			if ( isset( $this->query_args['product_includes'] ) ) {
+				$args['include'] = $this->query_args['product_includes'];
+			}
+
+			if ( isset( $this->query_args['category_includes'] ) ) {
+				$categories       = $this->query_args['category_includes'];
+				$args['category'] = array();
+				foreach ( $categories as $category_id ) {
+					$terms              = get_term_by( 'id', $category_id, 'product_cat' );
+					$args['category'][] = $terms->slug;
+				}
+			}
+
+			$segment_objects = wc_get_products( $args );
+			foreach ( $segment_objects as $segment ) {
+				$id                    = $segment->get_id();
+				$segments[]            = $id;
+				$segment_labels[ $id ] = $segment->get_name();
+			}
+		} elseif ( 'variation' === $this->query_args['segmentby'] ) {
+			$args = array(
+				'return' => 'objects',
+				'limit'  => -1,
+				'type'   => 'variation',
+			);
+
+			if (
+				isset( $this->query_args['product_includes'] ) &&
+				count( $this->query_args['product_includes'] ) === 1
+			) {
+				$args['parent'] = $this->query_args['product_includes'][0];
+			}
+
+			if ( isset( $this->query_args['variation_includes'] ) ) {
+				$args['include'] = $this->query_args['variation_includes'];
+			}
+
+			$segment_objects = wc_get_products( $args );
+
+			foreach ( $segment_objects as $segment ) {
+				$id           = $segment->get_id();
+				$segments[]   = $id;
+				$product_name = $segment->get_name();
+				$separator    = apply_filters( 'woocommerce_product_variation_title_attributes_separator', ' - ', $segment );
+				$attributes   = wc_get_formatted_variation( $segment, true, false );
+
+				$segment_labels[ $id ] = $product_name . $separator . $attributes;
+			}
+
+			// If no variations were specified, add a segment for the parent product (variation = 0).
+			// This is to catch simple products with prior sales converted into variable products.
+			// See: https://github.com/woocommerce/woocommerce-admin/issues/2719.
+			if ( isset( $args['parent'] ) && empty( $args['include'] ) ) {
+				$parent_object     = wc_get_product( $args['parent'] );
+				$segments[]        = 0;
+				$segment_labels[0] = $parent_object->get_name();
+			}
+		} elseif ( 'category' === $this->query_args['segmentby'] ) {
+			$args = array(
+				'taxonomy' => 'product_cat',
+			);
+
+			if ( isset( $this->query_args['category_includes'] ) ) {
+				$args['include'] = $this->query_args['category_includes'];
+			}
+
+			// @todo: Look into `wc_get_products` or data store methods and not directly touching the database or post types.
+			$categories = get_categories( $args );
+
+			$segments       = wp_list_pluck( $categories, 'cat_ID' );
+			$segment_labels = wp_list_pluck( $categories, 'name', 'cat_ID' );
+
+		} elseif ( 'coupon' === $this->query_args['segmentby'] ) {
+			$args = array();
+			if ( isset( $this->query_args['coupons'] ) ) {
+				$args['include'] = $this->query_args['coupons'];
+			}
+			$coupons_store  = new CouponsDataStore();
+			$coupons        = $coupons_store->get_coupons( $args );
+			$segments       = wp_list_pluck( $coupons, 'ID' );
+			$segment_labels = wp_list_pluck( $coupons, 'post_title', 'ID' );
+			$segment_labels = array_map( 'wc_format_coupon_code', $segment_labels );
+		} elseif ( 'customer_type' === $this->query_args['segmentby'] ) {
+			// 0 -- new customer
+			// 1 -- returning customer
+			$segments = array( 0, 1 );
+		} elseif ( 'tax_rate_id' === $this->query_args['segmentby'] ) {
+			$args = array();
+			if ( isset( $this->query_args['taxes'] ) ) {
+				$args['include'] = $this->query_args['taxes'];
+			}
+			$taxes = TaxesStatsDataStore::get_taxes( $args );
+
+			foreach ( $taxes as $tax ) {
+				$id                    = $tax['tax_rate_id'];
+				$segments[]            = $id;
+				$segment_labels[ $id ] = \WC_Tax::get_rate_code( (object) $tax );
+			}
+		} else {
+			// Catch all default.
+			$segments = array();
+		}
+
+		$this->all_segment_ids = $segments;
+		$this->segment_labels  = $segment_labels;
+	}
+
+	/**
+	 * Return all segment ids for given segmentby query parameter.
+	 *
+	 * @return array
+	 */
+	protected function get_all_segments() {
+		if ( ! is_array( $this->all_segment_ids ) ) {
+			$this->set_all_segments();
+		}
+
+		return $this->all_segment_ids;
+	}
+
+	/**
+	 * Return all segment labels for given segmentby query parameter.
+	 *
+	 * @return array
+	 */
+	protected function get_segment_labels() {
+		if ( ! is_array( $this->all_segment_ids ) ) {
+			$this->set_all_segments();
+		}
+
+		return $this->segment_labels;
+	}
+
+	/**
+	 * Compares two report data objects by pre-defined object property and ASC/DESC ordering.
+	 *
+	 * @param stdClass $a Object a.
+	 * @param stdClass $b Object b.
+	 * @return string
+	 */
+	private function segment_cmp( $a, $b ) {
+		if ( $a['segment_id'] === $b['segment_id'] ) {
+			return 0;
+		} elseif ( $a['segment_id'] > $b['segment_id'] ) {
+			return 1;
+		} elseif ( $a['segment_id'] < $b['segment_id'] ) {
+			return - 1;
+		}
+	}
+
+	/**
+	 * Adds zeroes for segments not present in the data selection.
+	 *
+	 * @param array $segments Array of segments from the database for given data points.
+	 *
+	 * @return array
+	 */
+	protected function fill_in_missing_segments( $segments ) {
+		$segment_subtotals = array();
+		if ( isset( $this->query_args['fields'] ) && is_array( $this->query_args['fields'] ) ) {
+			foreach ( $this->query_args['fields'] as $field ) {
+				if ( isset( $this->report_columns[ $field ] ) ) {
+					$segment_subtotals[ $field ] = 0;
+				}
+			}
+		} else {
+			foreach ( $this->report_columns as $field => $sql_clause ) {
+				$segment_subtotals[ $field ] = 0;
+			}
+		}
+		if ( ! is_array( $segments ) ) {
+			$segments = array();
+		}
+		$all_segment_ids = $this->get_all_segments();
+		$segment_labels  = $this->get_segment_labels();
+		foreach ( $all_segment_ids as $segment_id ) {
+			if ( ! isset( $segments[ $segment_id ] ) ) {
+				$segments[ $segment_id ] = array(
+					'segment_id'    => $segment_id,
+					'segment_label' => $segment_labels[ $segment_id ],
+					'subtotals'     => $segment_subtotals,
+				);
+			}
+		}
+
+		// Using array_values to remove custom keys, so that it gets later converted to JSON as an array.
+		$segments_no_keys = array_values( $segments );
+		usort( $segments_no_keys, array( $this, 'segment_cmp' ) );
+		return $segments_no_keys;
+	}
+
+	/**
+	 * Adds missing segments to intervals, modifies $data.
+	 *
+	 * @param stdClass $data Response data.
+	 */
+	protected function fill_in_missing_interval_segments( &$data ) {
+		foreach ( $data->intervals as $order_id => $interval_data ) {
+			$data->intervals[ $order_id ]['segments'] = $this->fill_in_missing_segments( $data->intervals[ $order_id ]['segments'] );
+		}
+	}
+
+	/**
+	 * Calculate segments for segmenting property bound to product (e.g. category, product_id, variation_id).
+	 *
+	 * @param string $type Type of segments to return--'totals' or 'intervals'.
+	 * @param array  $segmenting_selections SELECT part of segmenting SQL query--one for 'product_level' and one for 'order_level'.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $segmenting_dimension_name Name of the segmenting dimension.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $query_params Array of SQL clauses for intervals/totals query.
+	 * @param string $unique_orders_table Name of temporary SQL table that holds unique orders.
+	 *
+	 * @return array
+	 */
+	protected function get_product_related_segments( $type, $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table ) {
+		if ( 'totals' === $type ) {
+			return $this->get_product_related_totals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		} elseif ( 'intervals' === $type ) {
+			return $this->get_product_related_intervals_segments( $segmenting_selections, $segmenting_from, $segmenting_where, $segmenting_groupby, $segmenting_dimension_name, $table_name, $query_params, $unique_orders_table );
+		}
+	}
+
+	/**
+	 * Calculate segments for segmenting property bound to order (e.g. coupon or customer type).
+	 *
+	 * @param string $type Type of segments to return--'totals' or 'intervals'.
+	 * @param string $segmenting_select SELECT part of segmenting SQL query.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $query_params Array of SQL clauses for intervals/totals query.
+	 *
+	 * @return array
+	 */
+	protected function get_order_related_segments( $type, $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $query_params ) {
+		if ( 'totals' === $type ) {
+			return $this->get_order_related_totals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $query_params );
+		} elseif ( 'intervals' === $type ) {
+			return $this->get_order_related_intervals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $query_params );
+		}
+	}
+
+	/**
+	 * Assign segments to time intervals by updating original $intervals array.
+	 *
+	 * @param array $intervals Result array from intervals SQL query.
+	 * @param array $intervals_segments Result array from interval segments SQL query.
+	 */
+	protected function assign_segments_to_intervals( &$intervals, $intervals_segments ) {
+		$old_keys = array_keys( $intervals );
+		foreach ( $intervals as $interval ) {
+			$intervals[ $interval['time_interval'] ]             = $interval;
+			$intervals[ $interval['time_interval'] ]['segments'] = array();
+		}
+		foreach ( $old_keys as $key ) {
+			unset( $intervals[ $key ] );
+		}
+
+		foreach ( $intervals_segments as $time_interval => $segment ) {
+			if ( isset( $intervals[ $time_interval ] ) ) {
+				$intervals[ $time_interval ]['segments'] = $segment['segments'];
+			}
+		}
+		// To remove time interval keys (so that REST response is formatted correctly).
+		$intervals = array_values( $intervals );
+	}
+
+	/**
+	 * Returns an array of segments for totals part of REST response.
+	 *
+	 * @param array  $query_params Totals SQL query parameters.
+	 * @param string $table_name Name of the SQL table that is the main order stats table.
+	 *
+	 * @return array
+	 */
+	public function get_totals_segments( $query_params, $table_name ) {
+		$segments = $this->get_segments( 'totals', $query_params, $table_name );
+		$segments = $this->fill_in_missing_segments( $segments );
+
+		return $segments;
+	}
+
+	/**
+	 * Adds an array of segments to data->intervals object.
+	 *
+	 * @param stdClass $data Data object representing the REST response.
+	 * @param array    $intervals_query Intervals SQL query parameters.
+	 * @param string   $table_name Name of the SQL table that is the main order stats table.
+	 */
+	public function add_intervals_segments( &$data, $intervals_query, $table_name ) {
+		$intervals_segments = $this->get_segments( 'intervals', $intervals_query, $table_name );
+
+		$this->assign_segments_to_intervals( $data->intervals, $intervals_segments );
+		$this->fill_in_missing_interval_segments( $data );
+	}
+}

packages/woocommerce-admin/src/API/Reports/SqlQuery.php

@@ -0,0 +1,217 @@
+<?php
+/**
+ * Admin\API\Reports\SqlQuery class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Admin\API\Reports\SqlQuery: Common parent for manipulating SQL query clauses.
+ */
+class SqlQuery {
+	/**
+	 * List of SQL clauses.
+	 *
+	 * @var array
+	 */
+	private $sql_clauses = array(
+		'select'     => array(),
+		'from'       => array(),
+		'left_join'  => array(),
+		'join'       => array(),
+		'right_join' => array(),
+		'where'      => array(),
+		'where_time' => array(),
+		'group_by'   => array(),
+		'having'     => array(),
+		'limit'      => array(),
+		'order_by'   => array(),
+	);
+	/**
+	 * SQL clause merge filters.
+	 *
+	 * @var array
+	 */
+	private $sql_filters = array(
+		'where' => array(
+			'where',
+			'where_time',
+		),
+		'join'  => array(
+			'right_join',
+			'join',
+			'left_join',
+		),
+	);
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param string $context Optional context passed to filters. Default empty string.
+	 */
+	public function __construct( $context = '' ) {
+		$this->context = $context;
+	}
+
+	/**
+	 * Add a SQL clause to be included when get_data is called.
+	 *
+	 * @param string $type   Clause type.
+	 * @param string $clause SQL clause.
+	 */
+	protected function add_sql_clause( $type, $clause ) {
+		if ( isset( $this->sql_clauses[ $type ] ) && ! empty( $clause ) ) {
+			$this->sql_clauses[ $type ][] = $clause;
+		}
+	}
+
+	/**
+	 * Get SQL clause by type.
+	 *
+	 * @param string $type     Clause type.
+	 * @param string $handling Whether to filter the return value (filtered|unfiltered). Default unfiltered.
+	 *
+	 * @return string SQL clause.
+	 */
+	protected function get_sql_clause( $type, $handling = 'unfiltered' ) {
+		if ( ! isset( $this->sql_clauses[ $type ] ) ) {
+			return '';
+		}
+
+		/**
+		 * Default to bypassing filters for clause retrieval internal to data stores.
+		 * The filters are applied when the full SQL statement is retrieved.
+		 */
+		if ( 'unfiltered' === $handling ) {
+			return implode( ' ', $this->sql_clauses[ $type ] );
+		}
+
+		if ( isset( $this->sql_filters[ $type ] ) ) {
+			$clauses = array();
+			foreach ( $this->sql_filters[ $type ] as $subset ) {
+				$clauses = array_merge( $clauses, $this->sql_clauses[ $subset ] );
+			}
+		} else {
+			$clauses = $this->sql_clauses[ $type ];
+		}
+
+		/**
+		 * Filter SQL clauses by type and context.
+		 *
+		 * @param array  $clauses The original arguments for the request.
+		 * @param string $context The data store context.
+		 */
+		$clauses = apply_filters( "woocommerce_analytics_clauses_{$type}", $clauses, $this->context );
+		/**
+		 * Filter SQL clauses by type and context.
+		 *
+		 * @param array  $clauses The original arguments for the request.
+		 */
+		$clauses = apply_filters( "woocommerce_analytics_clauses_{$type}_{$this->context}", $clauses );
+		return implode( ' ', $clauses );
+	}
+
+	/**
+	 * Clear SQL clauses by type.
+	 *
+	 * @param string|array $types Clause type.
+	 */
+	protected function clear_sql_clause( $types ) {
+		foreach ( (array) $types as $type ) {
+			if ( isset( $this->sql_clauses[ $type ] ) ) {
+				$this->sql_clauses[ $type ] = array();
+			}
+		}
+	}
+
+	/**
+	 * Replace strings within SQL clauses by type.
+	 *
+	 * @param string $type    Clause type.
+	 * @param string $search  String to search for.
+	 * @param string $replace Replacement string.
+	 */
+	protected function str_replace_clause( $type, $search, $replace ) {
+		if ( isset( $this->sql_clauses[ $type ] ) ) {
+			foreach ( $this->sql_clauses[ $type ] as $key => $sql ) {
+				$this->sql_clauses[ $type ][ $key ] = str_replace( $search, $replace, $sql );
+			}
+		}
+	}
+
+	/**
+	 * Get the full SQL statement.
+	 *
+	 * @return string
+	 */
+	public function get_query_statement() {
+		$join     = $this->get_sql_clause( 'join', 'filtered' );
+		$where    = $this->get_sql_clause( 'where', 'filtered' );
+		$group_by = $this->get_sql_clause( 'group_by', 'filtered' );
+		$having   = $this->get_sql_clause( 'having', 'filtered' );
+		$order_by = $this->get_sql_clause( 'order_by', 'filtered' );
+
+		$statement = "
+			SELECT
+				{$this->get_sql_clause( 'select', 'filtered' )}
+			FROM
+				{$this->get_sql_clause( 'from', 'filtered' )}
+				{$join}
+			WHERE
+				1=1
+				{$where}
+		";
+
+		if ( ! empty( $group_by ) ) {
+			$statement .= "
+				GROUP BY
+					{$group_by}
+			";
+			if ( ! empty( $having ) ) {
+				$statement .= "
+					HAVING
+						1=1
+						{$having}
+				";
+			}
+		}
+
+		if ( ! empty( $order_by ) ) {
+			$statement .= "
+				ORDER BY
+					{$order_by}
+			";
+		}
+
+		return $statement . $this->get_sql_clause( 'limit', 'filtered' );
+	}
+
+	/**
+	 * Reinitialize the clause array.
+	 */
+	public function clear_all_clauses() {
+		$this->sql_clauses = array(
+			'select'     => array(),
+			'from'       => array(),
+			'left_join'  => array(),
+			'join'       => array(),
+			'right_join' => array(),
+			'where'      => array(),
+			'where_time' => array(),
+			'group_by'   => array(),
+			'having'     => array(),
+			'limit'      => array(),
+			'order_by'   => array(),
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Stock/Controller.php

@@ -0,0 +1,587 @@
+<?php
+/**
+ * REST API Reports stock controller
+ *
+ * Handles requests to the /reports/stock endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Stock;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+
+/**
+ * REST API Reports stock controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller implements ExportableInterface {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/stock';
+
+	/**
+	 * Registered stock status options.
+	 *
+	 * @var array
+	 */
+	protected $status_options;
+
+	/**
+	 * Constructor.
+	 */
+	public function __construct() {
+		$this->status_options = wc_get_product_stock_status_options();
+	}
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param  WP_REST_Request $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args                        = array();
+		$args['offset']              = $request['offset'];
+		$args['order']               = $request['order'];
+		$args['orderby']             = $request['orderby'];
+		$args['paged']               = $request['page'];
+		$args['post__in']            = $request['include'];
+		$args['post__not_in']        = $request['exclude'];
+		$args['posts_per_page']      = $request['per_page'];
+		$args['post_parent__in']     = $request['parent'];
+		$args['post_parent__not_in'] = $request['parent_exclude'];
+
+		if ( 'date' === $args['orderby'] ) {
+			$args['orderby'] = 'date ID';
+		} elseif ( 'include' === $args['orderby'] ) {
+			$args['orderby'] = 'post__in';
+		} elseif ( 'id' === $args['orderby'] ) {
+			$args['orderby'] = 'ID'; // ID must be capitalized.
+		}
+
+		$args['post_type'] = array( 'product', 'product_variation' );
+
+		if ( 'lowstock' === $request['type'] ) {
+			$args['low_in_stock'] = true;
+		} elseif ( in_array( $request['type'], array_keys( $this->status_options ), true ) ) {
+			$args['stock_status'] = $request['type'];
+		}
+
+		$args['ignore_sticky_posts'] = true;
+
+		return $args;
+	}
+
+	/**
+	 * Query products.
+	 *
+	 * @param  array $query_args Query args.
+	 * @return array
+	 */
+	protected function get_products( $query_args ) {
+		$query  = new \WP_Query();
+		$result = $query->query( $query_args );
+
+		$total_posts = $query->found_posts;
+		if ( $total_posts < 1 ) {
+			// Out-of-bounds, run the query again without LIMIT for total count.
+			unset( $query_args['paged'] );
+			$count_query = new \WP_Query();
+			$count_query->query( $query_args );
+			$total_posts = $count_query->found_posts;
+		}
+
+		return array(
+			'objects' => array_map( 'wc_get_product', $result ),
+			'total'   => (int) $total_posts,
+			'pages'   => (int) ceil( $total_posts / (int) $query->query_vars['posts_per_page'] ),
+		);
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		add_filter( 'posts_where', array( __CLASS__, 'add_wp_query_filter' ), 10, 2 );
+		add_filter( 'posts_join', array( __CLASS__, 'add_wp_query_join' ), 10, 2 );
+		add_filter( 'posts_groupby', array( __CLASS__, 'add_wp_query_group_by' ), 10, 2 );
+		add_filter( 'posts_clauses', array( __CLASS__, 'add_wp_query_orderby' ), 10, 2 );
+		$query_args    = $this->prepare_reports_query( $request );
+		$query_results = $this->get_products( $query_args );
+		remove_filter( 'posts_where', array( __CLASS__, 'add_wp_query_filter' ), 10 );
+		remove_filter( 'posts_join', array( __CLASS__, 'add_wp_query_join' ), 10 );
+		remove_filter( 'posts_groupby', array( __CLASS__, 'add_wp_query_group_by' ), 10 );
+		remove_filter( 'posts_clauses', array( __CLASS__, 'add_wp_query_orderby' ), 10 );
+
+		$objects = array();
+		foreach ( $query_results['objects'] as $object ) {
+			$data      = $this->prepare_item_for_response( $object, $request );
+			$objects[] = $this->prepare_response_for_collection( $data );
+		}
+
+		$page      = (int) $query_args['paged'];
+		$max_pages = $query_results['pages'];
+
+		$response = rest_ensure_response( $objects );
+		$response->header( 'X-WP-Total', $query_results['total'] );
+		$response->header( 'X-WP-TotalPages', (int) $max_pages );
+
+		$base = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Add in conditional search filters for products.
+	 *
+	 * @param string $where Where clause used to search posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_filter( $where, $wp_query ) {
+		global $wpdb;
+
+		$stock_status = $wp_query->get( 'stock_status' );
+		if ( $stock_status ) {
+			$where .= $wpdb->prepare(
+				' AND wc_product_meta_lookup.stock_status = %s ',
+				$stock_status
+			);
+		}
+
+		if ( $wp_query->get( 'low_in_stock' ) ) {
+			// We want products with stock < low stock amount, but greater than no stock amount.
+			$no_stock_amount  = absint( max( get_option( 'woocommerce_notify_no_stock_amount' ), 0 ) );
+			$low_stock_amount = absint( max( get_option( 'woocommerce_notify_low_stock_amount' ), 1 ) );
+			$where           .= "
+			AND wc_product_meta_lookup.stock_quantity IS NOT NULL
+			AND wc_product_meta_lookup.stock_status = 'instock'
+			AND (
+				(
+					low_stock_amount_meta.meta_value > ''
+					AND wc_product_meta_lookup.stock_quantity <= CAST(low_stock_amount_meta.meta_value AS SIGNED)
+					AND wc_product_meta_lookup.stock_quantity > {$no_stock_amount}
+				)
+				OR (
+					(
+						low_stock_amount_meta.meta_value IS NULL OR low_stock_amount_meta.meta_value <= ''
+					)
+					AND wc_product_meta_lookup.stock_quantity <= {$low_stock_amount}
+					AND wc_product_meta_lookup.stock_quantity > {$no_stock_amount}
+				)
+			)";
+		}
+
+		return $where;
+	}
+
+	/**
+	 * Join posts meta tables when product search or low stock query is present.
+	 *
+	 * @param string $join Join clause used to search posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_join( $join, $wp_query ) {
+		global $wpdb;
+
+		$stock_status = $wp_query->get( 'stock_status' );
+		if ( $stock_status ) {
+			$join = self::append_product_sorting_table_join( $join );
+		}
+
+		if ( $wp_query->get( 'low_in_stock' ) ) {
+			$join  = self::append_product_sorting_table_join( $join );
+			$join .= " LEFT JOIN {$wpdb->postmeta} AS low_stock_amount_meta ON {$wpdb->posts}.ID = low_stock_amount_meta.post_id AND low_stock_amount_meta.meta_key = '_low_stock_amount' ";
+		}
+
+		return $join;
+	}
+
+	/**
+	 * Join wc_product_meta_lookup to posts if not already joined.
+	 *
+	 * @param string $sql SQL join.
+	 * @return string
+	 */
+	protected static function append_product_sorting_table_join( $sql ) {
+		global $wpdb;
+
+		if ( ! strstr( $sql, 'wc_product_meta_lookup' ) ) {
+			$sql .= " LEFT JOIN {$wpdb->wc_product_meta_lookup} wc_product_meta_lookup ON $wpdb->posts.ID = wc_product_meta_lookup.product_id ";
+		}
+		return $sql;
+	}
+
+	/**
+	 * Group by post ID to prevent duplicates.
+	 *
+	 * @param string $groupby Group by clause used to organize posts.
+	 * @param object $wp_query WP_Query object.
+	 * @return string
+	 */
+	public static function add_wp_query_group_by( $groupby, $wp_query ) {
+		global $wpdb;
+
+		if ( empty( $groupby ) ) {
+			$groupby = $wpdb->posts . '.ID';
+		}
+		return $groupby;
+	}
+
+	/**
+	 * Custom orderby clauses using the lookup tables.
+	 *
+	 * @param array  $args Query args.
+	 * @param object $wp_query WP_Query object.
+	 * @return array
+	 */
+	public static function add_wp_query_orderby( $args, $wp_query ) {
+		global $wpdb;
+
+		$orderby = $wp_query->get( 'orderby' );
+		$order   = esc_sql( $wp_query->get( 'order' ) ? $wp_query->get( 'order' ) : 'desc' );
+
+		switch ( $orderby ) {
+			case 'stock_quantity':
+				$args['join']    = self::append_product_sorting_table_join( $args['join'] );
+				$args['orderby'] = " wc_product_meta_lookup.stock_quantity {$order}, wc_product_meta_lookup.product_id {$order} ";
+				break;
+			case 'stock_status':
+				$args['join']    = self::append_product_sorting_table_join( $args['join'] );
+				$args['orderby'] = " wc_product_meta_lookup.stock_status {$order}, wc_product_meta_lookup.stock_quantity {$order} ";
+				break;
+			case 'sku':
+				$args['join']    = self::append_product_sorting_table_join( $args['join'] );
+				$args['orderby'] = " wc_product_meta_lookup.sku {$order}, wc_product_meta_lookup.product_id {$order} ";
+				break;
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param  WC_Product      $product  Report data.
+	 * @param  WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $product, $request ) {
+		$data = array(
+			'id'               => $product->get_id(),
+			'parent_id'        => $product->get_parent_id(),
+			'name'             => wp_strip_all_tags( $product->get_name() ),
+			'sku'              => $product->get_sku(),
+			'stock_status'     => $product->get_stock_status(),
+			'stock_quantity'   => (float) $product->get_stock_quantity(),
+			'manage_stock'     => $product->get_manage_stock(),
+			'low_stock_amount' => $product->get_low_stock_amount(),
+		);
+
+		if ( '' === $data['low_stock_amount'] ) {
+			$data['low_stock_amount'] = absint( max( get_option( 'woocommerce_notify_low_stock_amount' ), 1 ) );
+		}
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $product ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param WC_Product       $product   The original product object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_stock', $response, $product, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param  WC_Product $product Object data.
+	 * @return array
+	 */
+	protected function prepare_links( $product ) {
+		if ( $product->is_type( 'variation' ) ) {
+			$links = array(
+				'product' => array(
+					'href' => rest_url( sprintf( '/%s/products/%d/variations/%d', $this->namespace, $product->get_parent_id(), $product->get_id() ) ),
+				),
+				'parent'  => array(
+					'href' => rest_url( sprintf( '/%s/products/%d', $this->namespace, $product->get_parent_id() ) ),
+				),
+			);
+		} elseif ( $product->get_parent_id() ) {
+			$links = array(
+				'product' => array(
+					'href' => rest_url( sprintf( '/%s/products/%d', $this->namespace, $product->get_id() ) ),
+				),
+				'parent'  => array(
+					'href' => rest_url( sprintf( '/%s/products/%d', $this->namespace, $product->get_parent_id() ) ),
+				),
+			);
+		} else {
+			$links = array(
+				'product' => array(
+					'href' => rest_url( sprintf( '/%s/products/%d', $this->namespace, $product->get_id() ) ),
+				),
+			);
+		}
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_stock',
+			'type'       => 'object',
+			'properties' => array(
+				'id'             => array(
+					'description' => __( 'Unique identifier for the resource.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'parent_id'      => array(
+					'description' => __( 'Product parent ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'name'           => array(
+					'description' => __( 'Product name.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'sku'            => array(
+					'description' => __( 'Unique identifier.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'stock_status'   => array(
+					'description' => __( 'Stock status.', 'woocommerce' ),
+					'type'        => 'string',
+					'enum'        => array_keys( wc_get_product_stock_status_options() ),
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'stock_quantity' => array(
+					'description' => __( 'Stock quantity.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'manage_stock'   => array(
+					'description' => __( 'Manage stock.', 'woocommerce' ),
+					'type'        => 'boolean',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                   = array();
+		$params['context']        = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']           = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']       = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['exclude']        = array(
+			'description'       => __( 'Ensure result set excludes specific IDs.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['include']        = array(
+			'description'       => __( 'Limit result set to specific ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['offset']         = array(
+			'description'       => __( 'Offset the result set by a specific number of items.', 'woocommerce' ),
+			'type'              => 'integer',
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']          = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'asc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']        = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'stock_status',
+			'enum'              => array(
+				'stock_status',
+				'stock_quantity',
+				'date',
+				'id',
+				'include',
+				'title',
+				'sku',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['parent']         = array(
+			'description'       => __( 'Limit result set to those of particular parent IDs.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'default'           => array(),
+		);
+		$params['parent_exclude'] = array(
+			'description'       => __( 'Limit result set to all items except those of a particular parent ID.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'default'           => array(),
+		);
+		$params['type']           = array(
+			'description' => __( 'Limit result set to items assigned a stock report type.', 'woocommerce' ),
+			'type'        => 'string',
+			'default'     => 'all',
+			'enum'        => array_merge( array( 'all', 'lowstock' ), array_keys( wc_get_product_stock_status_options() ) ),
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'title'          => __( 'Product / Variation', 'woocommerce' ),
+			'sku'            => __( 'SKU', 'woocommerce' ),
+			'stock_status'   => __( 'Status', 'woocommerce' ),
+			'stock_quantity' => __( 'Stock', 'woocommerce' ),
+		);
+
+		/**
+		 * Filter to add or remove column names from the stock report for
+		 * export.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_stock_export_columns',
+			$export_columns
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$status = $item['stock_status'];
+		if ( array_key_exists( $item['stock_status'], $this->status_options ) ) {
+			$status = $this->status_options[ $item['stock_status'] ];
+		}
+
+		$export_item = array(
+			'title'          => $item['name'],
+			'sku'            => $item['sku'],
+			'stock_status'   => $status,
+			'stock_quantity' => $item['stock_quantity'],
+		);
+
+		/**
+		 * Filter to prepare extra columns in the export item for the stock
+		 * report.
+		 *
+		 * @since 1.6.0
+		 */
+		return apply_filters(
+			'woocommerce_report_stock_prepare_export_item',
+			$export_item,
+			$item
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Stock/Stats/Controller.php

@@ -0,0 +1,137 @@
+<?php
+/**
+ * REST API Reports stock stats controller
+ *
+ * Handles requests to the /reports/stock/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Stock\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Reports stock stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/stock/stats';
+
+	/**
+	 * Get Stock Status Totals.
+	 *
+	 * @param  WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$stock_query = new Query();
+		$report_data = $stock_query->get_data();
+		$out_data    = array(
+			'totals' => $report_data,
+		);
+		return rest_ensure_response( $out_data );
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param  WC_Product      $report  Report data.
+	 * @param  WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param WC_Product       $product   The original bject.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_stock_stats', $response, $product, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$totals = array(
+			'products' => array(
+				'description' => __( 'Number of products.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'lowstock' => array(
+				'description' => __( 'Number of low stock products.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+		);
+
+		$status_options = wc_get_product_stock_status_options();
+		foreach ( $status_options as $status => $label ) {
+			$totals[ $status ] = array(
+				/* translators: Stock status. Example: "Number of low stock products */
+				'description' => sprintf( __( 'Number of %s products.', 'woocommerce' ), $label ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			);
+		}
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_customers_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals' => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params            = array();
+		$params['context'] = $this->get_context_param( array( 'default' => 'view' ) );
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Stock/Stats/DataStore.php

@@ -0,0 +1,138 @@
+<?php
+/**
+ * API\Reports\Stock\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Stock\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+
+/**
+ * API\Reports\Stock\Stats\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Get stock counts for the whole store.
+	 *
+	 * @param array $query Not used for the stock stats data store, but needed for the interface.
+	 * @return array Array of counts.
+	 */
+	public function get_data( $query ) {
+		$report_data              = array();
+		$cache_expire             = DAY_IN_SECONDS * 30;
+		$low_stock_transient_name = 'wc_admin_stock_count_lowstock';
+		$low_stock_count          = get_transient( $low_stock_transient_name );
+		if ( false === $low_stock_count ) {
+			$low_stock_count = $this->get_low_stock_count();
+			set_transient( $low_stock_transient_name, $low_stock_count, $cache_expire );
+		} else {
+			$low_stock_count = intval( $low_stock_count );
+		}
+		$report_data['lowstock'] = $low_stock_count;
+
+		$status_options = wc_get_product_stock_status_options();
+		foreach ( $status_options as $status => $label ) {
+			$transient_name = 'wc_admin_stock_count_' . $status;
+			$count          = get_transient( $transient_name );
+			if ( false === $count ) {
+				$count = $this->get_count( $status );
+				set_transient( $transient_name, $count, $cache_expire );
+			} else {
+				$count = intval( $count );
+			}
+			$report_data[ $status ] = $count;
+		}
+
+		$product_count_transient_name = 'wc_admin_product_count';
+		$product_count                = get_transient( $product_count_transient_name );
+		if ( false === $product_count ) {
+			$product_count = $this->get_product_count();
+			set_transient( $product_count_transient_name, $product_count, $cache_expire );
+		} else {
+			$product_count = intval( $product_count );
+		}
+		$report_data['products'] = $product_count;
+		return $report_data;
+	}
+
+	/**
+	 * Get low stock count (products with stock < low stock amount, but greater than no stock amount).
+	 *
+	 * @return int Low stock count.
+	 */
+	private function get_low_stock_count() {
+		global $wpdb;
+
+		$no_stock_amount  = absint( max( get_option( 'woocommerce_notify_no_stock_amount' ), 0 ) );
+		$low_stock_amount = absint( max( get_option( 'woocommerce_notify_low_stock_amount' ), 1 ) );
+
+		return (int) $wpdb->get_var(
+			$wpdb->prepare(
+				"
+				SELECT count( DISTINCT posts.ID ) FROM {$wpdb->posts} posts
+				LEFT JOIN {$wpdb->wc_product_meta_lookup} wc_product_meta_lookup ON posts.ID = wc_product_meta_lookup.product_id
+				LEFT JOIN {$wpdb->postmeta} low_stock_amount_meta ON posts.ID = low_stock_amount_meta.post_id AND low_stock_amount_meta.meta_key = '_low_stock_amount'
+				WHERE posts.post_type IN ( 'product', 'product_variation' )
+				AND wc_product_meta_lookup.stock_quantity IS NOT NULL
+				AND wc_product_meta_lookup.stock_status = 'instock'
+				AND (
+					(
+						low_stock_amount_meta.meta_value > ''
+						AND wc_product_meta_lookup.stock_quantity <= CAST(low_stock_amount_meta.meta_value AS SIGNED)
+						AND wc_product_meta_lookup.stock_quantity > %d
+					)
+					OR (
+						(
+							low_stock_amount_meta.meta_value IS NULL OR low_stock_amount_meta.meta_value <= ''
+						)
+						AND wc_product_meta_lookup.stock_quantity <= %d
+						AND wc_product_meta_lookup.stock_quantity > %d
+					)
+				)
+				",
+				$no_stock_amount,
+				$low_stock_amount,
+				$no_stock_amount
+			)
+		);
+	}
+
+	/**
+	 * Get count for the passed in stock status.
+	 *
+	 * @param  string $status Status slug.
+	 * @return int Count.
+	 */
+	private function get_count( $status ) {
+		global $wpdb;
+
+		return (int) $wpdb->get_var(
+			$wpdb->prepare(
+				"
+				SELECT count( DISTINCT posts.ID ) FROM {$wpdb->posts} posts
+				LEFT JOIN {$wpdb->wc_product_meta_lookup} wc_product_meta_lookup ON posts.ID = wc_product_meta_lookup.product_id
+				WHERE posts.post_type IN ( 'product', 'product_variation' )
+				AND wc_product_meta_lookup.stock_status = %s
+				",
+				$status
+			)
+		);
+	}
+
+	/**
+	 * Get product count for the store.
+	 *
+	 * @return int Product count.
+	 */
+	private function get_product_count() {
+		$query_args              = array();
+		$query_args['post_type'] = array( 'product', 'product_variation' );
+		$query                   = new \WP_Query();
+		$query->query( $query_args );
+		return intval( $query->found_posts );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Stock/Stats/Query.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * Class for stock stats report querying
+ *
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Stock\Stats\Query();
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Stock\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Stock\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$data_store = \WC_Data_Store::load( 'report-stock-stats' );
+		$results    = $data_store->get_data();
+		return apply_filters( 'woocommerce_analytics_stock_stats_query', $results );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Taxes/Controller.php

@@ -0,0 +1,327 @@
+<?php
+/**
+ * REST API Reports taxes controller
+ *
+ * Handles requests to the /reports/taxes endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Taxes;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableTraits;
+
+/**
+ * REST API Reports taxes controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller implements ExportableInterface {
+	/**
+	 * Exportable traits.
+	 */
+	use ExportableTraits;
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/taxes';
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args             = array();
+		$args['before']   = $request['before'];
+		$args['after']    = $request['after'];
+		$args['page']     = $request['page'];
+		$args['per_page'] = $request['per_page'];
+		$args['orderby']  = $request['orderby'];
+		$args['order']    = $request['order'];
+		$args['taxes']    = $request['taxes'];
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args  = $this->prepare_reports_query( $request );
+		$taxes_query = new Query( $query_args );
+		$report_data = $taxes_query->get_data();
+
+		$data = array();
+
+		foreach ( $report_data->data as $tax_data ) {
+			$item   = $this->prepare_item_for_response( (object) $tax_data, $request );
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$report  = $this->add_additional_fields_to_object( $report, $request );
+		$report  = $this->filter_response_by_context( $report, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $report );
+		$response->add_links( $this->prepare_links( $report ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_taxes', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param WC_Reports_Query $object Object data.
+	 * @return array
+	 */
+	protected function prepare_links( $object ) {
+		$links = array(
+			'tax' => array(
+				'href' => rest_url( sprintf( '/%s/taxes/%d', $this->namespace, $object->tax_rate_id ) ),
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_taxes',
+			'type'       => 'object',
+			'properties' => array(
+				'tax_rate_id'  => array(
+					'description' => __( 'Tax rate ID.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'name'         => array(
+					'description' => __( 'Tax rate name.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'tax_rate'     => array(
+					'description' => __( 'Tax rate.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'country'      => array(
+					'description' => __( 'Country / Region.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'state'        => array(
+					'description' => __( 'State.', 'woocommerce' ),
+					'type'        => 'string',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'priority'     => array(
+					'description' => __( 'Priority.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'total_tax'    => array(
+					'description' => __( 'Total tax.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'order_tax'    => array(
+					'description' => __( 'Order tax.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'shipping_tax' => array(
+					'description' => __( 'Shipping tax.', 'woocommerce' ),
+					'type'        => 'number',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'orders_count' => array(
+					'description' => __( 'Number of orders.', 'woocommerce' ),
+					'type'        => 'integer',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params             = array();
+		$params['context']  = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']     = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page'] = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']    = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']   = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']    = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']  = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'tax_rate_id',
+			'enum'              => array(
+				'name',
+				'tax_rate_id',
+				'tax_code',
+				'rate',
+				'order_tax',
+				'total_tax',
+				'shipping_tax',
+				'orders_count',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['taxes']    = array(
+			'description'       => __( 'Limit result set to items assigned one or more tax rates.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		return array(
+			'tax_code'     => __( 'Tax code', 'woocommerce' ),
+			'rate'         => __( 'Rate', 'woocommerce' ),
+			'total_tax'    => __( 'Total tax', 'woocommerce' ),
+			'order_tax'    => __( 'Order tax', 'woocommerce' ),
+			'shipping_tax' => __( 'Shipping tax', 'woocommerce' ),
+			'orders_count' => __( 'Orders', 'woocommerce' ),
+		);
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		return array(
+			'tax_code'     => \WC_Tax::get_rate_code( $item['tax_rate_id'] ),
+			'rate'         => $item['tax_rate'],
+			'total_tax'    => self::csv_number_format( $item['total_tax'] ),
+			'order_tax'    => self::csv_number_format( $item['order_tax'] ),
+			'shipping_tax' => self::csv_number_format( $item['shipping_tax'] ),
+			'orders_count' => $item['orders_count'],
+		);
+	}
+}

packages/woocommerce-admin/src/API/Reports/Taxes/DataStore.php

@@ -0,0 +1,348 @@
+<?php
+/**
+ * API\Reports\Taxes\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Taxes;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+use \Automattic\WooCommerce\Admin\API\Reports\Cache as ReportsCache;
+
+/**
+ * API\Reports\Taxes\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_tax_lookup';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'taxes';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'tax_rate_id'  => 'intval',
+		'name'         => 'strval',
+		'tax_rate'     => 'floatval',
+		'country'      => 'strval',
+		'state'        => 'strval',
+		'priority'     => 'intval',
+		'total_tax'    => 'floatval',
+		'order_tax'    => 'floatval',
+		'shipping_tax' => 'floatval',
+		'orders_count' => 'intval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'taxes';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'tax_rate_id'  => "{$table_name}.tax_rate_id",
+			'name'         => 'tax_rate_name as name',
+			'tax_rate'     => 'tax_rate',
+			'country'      => 'tax_rate_country as country',
+			'state'        => 'tax_rate_state as state',
+			'priority'     => 'tax_rate_priority as priority',
+			'total_tax'    => 'SUM(total_tax) as total_tax',
+			'order_tax'    => 'SUM(order_tax) as order_tax',
+			'shipping_tax' => 'SUM(shipping_tax) as shipping_tax',
+			'orders_count' => "COUNT( DISTINCT ( CASE WHEN total_tax >= 0 THEN {$table_name}.order_id END ) ) as orders_count",
+		);
+	}
+
+	/**
+	 * Set up all the hooks for maintaining and populating table data.
+	 */
+	public static function init() {
+		add_action( 'woocommerce_analytics_delete_order_stats', array( __CLASS__, 'sync_on_order_delete' ), 15 );
+	}
+
+	/**
+	 * Fills FROM clause of SQL request based on user supplied parameters.
+	 *
+	 * @param array  $query_args          Query arguments supplied by the user.
+	 * @param string $order_status_filter Order status subquery.
+	 */
+	protected function add_from_sql_params( $query_args, $order_status_filter ) {
+		global $wpdb;
+		$table_name = self::get_db_table_name();
+
+		if ( $order_status_filter ) {
+			$this->subquery->add_sql_clause( 'join', "JOIN {$wpdb->prefix}wc_order_stats ON {$table_name}.order_id = {$wpdb->prefix}wc_order_stats.order_id" );
+		}
+
+		if ( isset( $query_args['taxes'] ) && ! empty( $query_args['taxes'] ) ) {
+			$this->add_sql_clause( 'join', "JOIN {$wpdb->prefix}woocommerce_tax_rates ON default_results.tax_rate_id = {$wpdb->prefix}woocommerce_tax_rates.tax_rate_id" );
+		} else {
+			$this->subquery->add_sql_clause( 'join', "JOIN {$wpdb->prefix}woocommerce_tax_rates ON {$table_name}.tax_rate_id = {$wpdb->prefix}woocommerce_tax_rates.tax_rate_id" );
+		}
+	}
+
+	/**
+	 * Updates the database query with parameters used for Taxes report: categories and order status.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+
+		$order_tax_lookup_table = self::get_db_table_name();
+
+		$this->add_time_period_sql_params( $query_args, $order_tax_lookup_table );
+		$this->get_limit_sql_params( $query_args );
+		$this->add_order_by_sql_params( $query_args );
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		$this->add_from_sql_params( $query_args, $order_status_filter );
+
+		if ( isset( $query_args['taxes'] ) && ! empty( $query_args['taxes'] ) ) {
+			$allowed_taxes = self::get_filtered_ids( $query_args, 'taxes' );
+			$this->subquery->add_sql_clause( 'where', "AND {$order_tax_lookup_table}.tax_rate_id IN ({$allowed_taxes})" );
+		}
+
+		if ( $order_status_filter ) {
+			$this->subquery->add_sql_clause( 'where', "AND ( {$order_status_filter} )" );
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page' => get_option( 'posts_per_page' ),
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'tax_rate_id',
+			'before'   => TimeInterval::default_before(),
+			'after'    => TimeInterval::default_after(),
+			'fields'   => '*',
+			'taxes'    => array(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$this->add_sql_query_params( $query_args );
+			$params = $this->get_limit_params( $query_args );
+
+			if ( isset( $query_args['taxes'] ) && ! empty( $query_args['taxes'] ) ) {
+				$total_results = count( $query_args['taxes'] );
+				$total_pages   = (int) ceil( $total_results / $params['per_page'] );
+
+				$inner_selections = array( 'tax_rate_id', 'total_tax', 'order_tax', 'shipping_tax', 'orders_count' );
+				$outer_selections = array( 'name', 'tax_rate', 'country', 'state', 'priority' );
+
+				$selections      = $this->selected_columns( array( 'fields' => $inner_selections ) );
+				$fields          = $this->get_fields( $query_args );
+				$join_selections = $this->format_join_selections( $fields, array( 'tax_rate_id' ), $outer_selections );
+				$ids_table       = $this->get_ids_table( $query_args['taxes'], 'tax_rate_id' );
+
+				$this->subquery->clear_sql_clause( 'select' );
+				$this->subquery->add_sql_clause( 'select', $this->selected_columns( array( 'fields' => $inner_selections ) ) );
+				$this->add_sql_clause( 'select', $join_selections );
+				$this->add_sql_clause( 'from', '(' );
+				$this->add_sql_clause( 'from', $this->subquery->get_query_statement() );
+				$this->add_sql_clause( 'from', ") AS {$table_name}" );
+				$this->add_sql_clause(
+					'right_join',
+					"RIGHT JOIN ( {$ids_table} ) AS default_results
+					ON default_results.tax_rate_id = {$table_name}.tax_rate_id"
+				);
+
+				$taxes_query = $this->get_query_statement();
+			} else {
+				$db_records_count = (int) $wpdb->get_var(
+					"SELECT COUNT(*) FROM (
+						{$this->subquery->get_query_statement()}
+					) AS tt"
+				); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+				$total_results = $db_records_count;
+				$total_pages   = (int) ceil( $db_records_count / $params['per_page'] );
+
+				if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+					return $data;
+				}
+
+				$this->subquery->clear_sql_clause( 'select' );
+				$this->subquery->add_sql_clause( 'select', $this->selected_columns( $query_args ) );
+				$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+				$taxes_query = $this->subquery->get_query_statement();
+			}
+
+			$tax_data = $wpdb->get_results(
+				$taxes_query,
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $tax_data ) {
+				return $data;
+			}
+
+			$tax_data = array_map( array( $this, 'cast_numbers' ), $tax_data );
+			$data     = (object) array(
+				'data'    => $tax_data,
+				'total'   => $total_results,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Maps ordering specified by the user to columns in the database/fields in the data.
+	 *
+	 * @param string $order_by Sorting criterion.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		global $wpdb;
+
+		if ( 'tax_code' === $order_by ) {
+			return 'CONCAT_WS( "-", NULLIF(tax_rate_country, ""), NULLIF(tax_rate_state, ""), NULLIF(tax_rate_name, ""), NULLIF(tax_rate_priority, "") )';
+		} elseif ( 'rate' === $order_by ) {
+			return "CAST({$wpdb->prefix}woocommerce_tax_rates.tax_rate as DECIMAL(7,4))";
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Create or update an entry in the wc_order_tax_lookup table for an order.
+	 *
+	 * @param int $order_id Order ID.
+	 * @return int|bool Returns -1 if order won't be processed, or a boolean indicating processing success.
+	 */
+	public static function sync_order_taxes( $order_id ) {
+		global $wpdb;
+
+		$order = wc_get_order( $order_id );
+		if ( ! $order ) {
+			return -1;
+		}
+
+		$tax_items   = $order->get_items( 'tax' );
+		$num_updated = 0;
+
+		foreach ( $tax_items as $tax_item ) {
+			$result = $wpdb->replace(
+				self::get_db_table_name(),
+				array(
+					'order_id'     => $order->get_id(),
+					'date_created' => $order->get_date_created( 'edit' )->date( TimeInterval::$sql_datetime_format ),
+					'tax_rate_id'  => $tax_item->get_rate_id(),
+					'shipping_tax' => $tax_item->get_shipping_tax_total(),
+					'order_tax'    => $tax_item->get_tax_total(),
+					'total_tax'    => (float) $tax_item->get_tax_total() + (float) $tax_item->get_shipping_tax_total(),
+				),
+				array(
+					'%d',
+					'%s',
+					'%d',
+					'%f',
+					'%f',
+					'%f',
+				)
+			);
+
+			/**
+			 * Fires when tax's reports are updated.
+			 *
+			 * @param int $tax_rate_id Tax Rate ID.
+			 * @param int $order_id    Order ID.
+			 */
+			do_action( 'woocommerce_analytics_update_tax', $tax_item->get_rate_id(), $order->get_id() );
+
+			// Sum the rows affected. Using REPLACE can affect 2 rows if the row already exists.
+			$num_updated += 2 === intval( $result ) ? 1 : intval( $result );
+		}
+
+		return ( count( $tax_items ) === $num_updated );
+	}
+
+	/**
+	 * Clean taxes data when an order is deleted.
+	 *
+	 * @param int $order_id Order ID.
+	 */
+	public static function sync_on_order_delete( $order_id ) {
+		global $wpdb;
+
+		$wpdb->delete( self::get_db_table_name(), array( 'order_id' => $order_id ) );
+
+		/**
+		 * Fires when tax's reports are removed from database.
+		 *
+		 * @param int $tax_rate_id Tax Rate ID.
+		 * @param int $order_id    Order ID.
+		 */
+		do_action( 'woocommerce_analytics_delete_tax', 0, $order_id );
+
+		ReportsCache::invalidate();
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'select', self::get_db_table_name() . '.tax_rate_id' );
+		$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->subquery->add_sql_clause( 'group_by', self::get_db_table_name() . '.tax_rate_id' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Taxes/Query.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * Class for parameter-based Taxes Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'page'         => 2,
+ *          'taxes'        => array(1,2,3)
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Taxes\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Taxes;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Taxes\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Taxes report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_taxes_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-taxes' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_taxes_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Taxes/Stats/Controller.php

@@ -0,0 +1,400 @@
+<?php
+/**
+ * REST API Reports taxes stats controller
+ *
+ * Handles requests to the /reports/taxes/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * REST API Reports taxes stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/taxes/stats';
+
+	/**
+	 * Constructor.
+	 */
+	public function __construct() {
+		add_filter( 'woocommerce_analytics_taxes_stats_select_query', array( $this, 'set_default_report_data' ) );
+	}
+
+	/**
+	 * Set the default results to 0 if API returns an empty array
+	 *
+	 * @param Mixed $results Report data.
+	 * @return object
+	 */
+	public function set_default_report_data( $results ) {
+		if ( empty( $results ) ) {
+			$results                       = new \stdClass();
+			$results->total                = 0;
+			$results->totals               = new \stdClass();
+			$results->totals->tax_codes    = 0;
+			$results->totals->total_tax    = 0;
+			$results->totals->order_tax    = 0;
+			$results->totals->shipping_tax = 0;
+			$results->totals->orders       = 0;
+			$results->intervals            = array();
+			$results->pages                = 1;
+			$results->page_no              = 1;
+		}
+		return $results;
+	}
+
+	/**
+	 * Maps query arguments from the REST request.
+	 *
+	 * @param array $request Request array.
+	 * @return array
+	 */
+	protected function prepare_reports_query( $request ) {
+		$args              = array();
+		$args['before']    = $request['before'];
+		$args['after']     = $request['after'];
+		$args['interval']  = $request['interval'];
+		$args['page']      = $request['page'];
+		$args['per_page']  = $request['per_page'];
+		$args['orderby']   = $request['orderby'];
+		$args['order']     = $request['order'];
+		$args['taxes']     = (array) $request['taxes'];
+		$args['segmentby'] = $request['segmentby'];
+		$args['fields']    = $request['fields'];
+
+		return $args;
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args  = $this->prepare_reports_query( $request );
+		$taxes_query = new Query( $query_args );
+		$report_data = $taxes_query->get_data();
+
+		$out_data = array(
+			'totals'    => get_object_vars( $report_data->totals ),
+			'intervals' => array(),
+		);
+
+		foreach ( $report_data->intervals as $interval_data ) {
+			$item                    = $this->prepare_item_for_response( (object) $interval_data, $request );
+			$out_data['intervals'][] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param stdClass        $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = get_object_vars( $report );
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_taxes_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$data_values = array(
+			'total_tax'    => array(
+				'description' => __( 'Total tax.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'order_tax'    => array(
+				'description' => __( 'Order tax.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'shipping_tax' => array(
+				'description' => __( 'Shipping tax.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+				'format'      => 'currency',
+			),
+			'orders_count' => array(
+				'description' => __( 'Number of orders.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+			'tax_codes'    => array(
+				'description' => __( 'Amount of tax codes.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+		);
+
+		$segments = array(
+			'segments' => array(
+				'description' => __( 'Reports data grouped by segment condition.', 'woocommerce' ),
+				'type'        => 'array',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'items'       => array(
+					'type'       => 'object',
+					'properties' => array(
+						'segment_id' => array(
+							'description' => __( 'Segment identificator.', 'woocommerce' ),
+							'type'        => 'integer',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+						),
+						'subtotals'  => array(
+							'description' => __( 'Interval subtotals.', 'woocommerce' ),
+							'type'        => 'object',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'properties'  => $data_values,
+						),
+					),
+				),
+			),
+		);
+
+		$totals = array_merge( $data_values, $segments );
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_taxes_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals'    => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+				'intervals' => array(
+					'description' => __( 'Reports data grouped by intervals.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'object',
+						'properties' => array(
+							'interval'       => array(
+								'description' => __( 'Type of interval.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'enum'        => array( 'day', 'week', 'month', 'year' ),
+							),
+							'date_start'     => array(
+								'description' => __( "The date the report start, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_start_gmt' => array(
+								'description' => __( 'The date the report start, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end'       => array(
+								'description' => __( "The date the report end, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end_gmt'   => array(
+								'description' => __( 'The date the report end, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'subtotals'      => array(
+								'description' => __( 'Interval subtotals.', 'woocommerce' ),
+								'type'        => 'object',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'properties'  => $totals,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params              = array();
+		$params['context']   = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']      = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']  = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']     = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']    = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']     = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']   = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'items_sold',
+				'total_sales',
+				'orders_count',
+				'products_count',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']  = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['taxes']     = array(
+			'description'       => __( 'Limit result set to all items that have the specified term assigned in the taxes taxonomy.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['segmentby'] = array(
+			'description'       => __( 'Segment the response by additional constraint.', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'tax_rate_id',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['fields']    = array(
+			'description'       => __( 'Limit stats fields to the specified items.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Taxes/Stats/DataStore.php

@@ -0,0 +1,263 @@
+<?php
+/**
+ * API\Reports\Taxes\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Taxes\Stats\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_tax_lookup';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'taxes_stats';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'tax_codes'    => 'intval',
+		'total_tax'    => 'floatval',
+		'order_tax'    => 'floatval',
+		'shipping_tax' => 'floatval',
+		'orders_count' => 'intval',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'taxes_stats';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'tax_codes'    => 'COUNT(DISTINCT tax_rate_id) as tax_codes',
+			'total_tax'    => 'SUM(total_tax) AS total_tax',
+			'order_tax'    => 'SUM(order_tax) as order_tax',
+			'shipping_tax' => 'SUM(shipping_tax) as shipping_tax',
+			'orders_count' => "COUNT( DISTINCT ( CASE WHEN parent_id = 0 THEN {$table_name}.order_id END ) ) as orders_count",
+		);
+	}
+
+	/**
+	 * Updates the database query with parameters used for Taxes Stats report
+	 *
+	 * @param array $query_args       Query arguments supplied by the user.
+	 */
+	protected function update_sql_query_params( $query_args ) {
+		$taxes_where_clause     = '';
+		$order_tax_lookup_table = self::get_db_table_name();
+
+		if ( isset( $query_args['taxes'] ) && ! empty( $query_args['taxes'] ) ) {
+			$allowed_taxes       = implode( ',', $query_args['taxes'] );
+			$taxes_where_clause .= " AND {$order_tax_lookup_table}.tax_rate_id IN ({$allowed_taxes})";
+		}
+
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		if ( $order_status_filter ) {
+			$taxes_where_clause .= " AND ( {$order_status_filter} )";
+		}
+
+		$this->add_time_period_sql_params( $query_args, $order_tax_lookup_table );
+		$this->total_query->add_sql_clause( 'where', $taxes_where_clause );
+
+		$this->add_intervals_sql_params( $query_args, $order_tax_lookup_table );
+		$this->interval_query->add_sql_clause( 'where', $taxes_where_clause );
+		$this->interval_query->add_sql_clause( 'select', $this->get_sql_clause( 'select' ) . ' AS time_interval' );
+		$this->interval_query->add_sql_clause( 'where_time', $this->get_sql_clause( 'where_time' ) );
+	}
+
+	/**
+	 * Get taxes associated with a store.
+	 *
+	 * @param array $args Array of args to filter the query by. Supports `include`.
+	 * @return array An array of all taxes.
+	 */
+	public static function get_taxes( $args ) {
+		global $wpdb;
+		$query = "
+			SELECT 
+				tax_rate_id, 
+				tax_rate_country, 
+				tax_rate_state, 
+				tax_rate_name, 
+				tax_rate_priority 
+			FROM {$wpdb->prefix}woocommerce_tax_rates
+		";
+		if ( ! empty( $args['include'] ) ) {
+			$included_taxes = implode( ',', $args['include'] );
+			$query         .= " WHERE tax_rate_id IN ({$included_taxes})";
+		}
+		return $wpdb->get_results( $query, ARRAY_A ); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page' => get_option( 'posts_per_page' ),
+			'page'     => 1,
+			'order'    => 'DESC',
+			'orderby'  => 'tax_rate_id',
+			'before'   => TimeInterval::default_before(),
+			'after'    => TimeInterval::default_after(),
+			'fields'   => '*',
+			'taxes'    => array(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'totals'    => (object) array(),
+				'intervals' => (object) array(),
+				'total'     => 0,
+				'pages'     => 0,
+				'page_no'   => 0,
+			);
+
+			$selections       = $this->selected_columns( $query_args );
+			$params           = $this->get_limit_params( $query_args );
+			$order_stats_join = "JOIN {$wpdb->prefix}wc_order_stats ON {$table_name}.order_id = {$wpdb->prefix}wc_order_stats.order_id";
+			$this->update_sql_query_params( $query_args );
+			$this->interval_query->add_sql_clause( 'join', $order_stats_join );
+
+			$db_intervals            = $wpdb->get_col(
+				$this->interval_query->get_query_statement()
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+			$db_interval_count       = count( $db_intervals );
+			$expected_interval_count = TimeInterval::intervals_between( $query_args['after'], $query_args['before'], $query_args['interval'] );
+			$total_pages             = (int) ceil( $expected_interval_count / $params['per_page'] );
+
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return $data;
+			}
+			$this->total_query->add_sql_clause( 'select', $selections );
+			$this->total_query->add_sql_clause( 'join', $order_stats_join );
+			$this->total_query->add_sql_clause( 'where_time', $this->get_sql_clause( 'where_time' ) );
+
+			$totals = $wpdb->get_results(
+				$this->total_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $totals ) {
+				return new \WP_Error( 'woocommerce_analytics_taxes_stats_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ) );
+			}
+
+			// @todo remove these assignements when refactoring segmenter classes to use query objects.
+			$totals_query          = array(
+				'from_clause'       => $this->total_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->total_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->total_query->get_sql_clause( 'where' ),
+			);
+			$intervals_query       = array(
+				'select_clause'     => $this->get_sql_clause( 'select' ),
+				'from_clause'       => $this->interval_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->interval_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->interval_query->get_sql_clause( 'where' ),
+			);
+			$segmenter             = new Segmenter( $query_args, $this->report_columns );
+			$totals[0]['segments'] = $segmenter->get_totals_segments( $totals_query, $table_name );
+
+			$this->update_intervals_sql_params( $query_args, $db_interval_count, $expected_interval_count, $table_name );
+
+			if ( '' !== $selections ) {
+				$this->interval_query->add_sql_clause( 'select', ', ' . $selections );
+			}
+
+			$this->interval_query->add_sql_clause( 'select', ", MAX({$table_name}.date_created) AS datetime_anchor" );
+			$this->interval_query->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->interval_query->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+
+			$intervals = $wpdb->get_results(
+				$this->interval_query->get_query_statement(),
+				ARRAY_A
+			); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+			if ( null === $intervals ) {
+				return new \WP_Error( 'woocommerce_analytics_taxes_stats_result_failed', __( 'Sorry, fetching tax data failed.', 'woocommerce' ) );
+			}
+
+			$totals = (object) $this->cast_numbers( $totals[0] );
+
+			$data = (object) array(
+				'totals'    => $totals,
+				'intervals' => $intervals,
+				'total'     => $expected_interval_count,
+				'pages'     => $total_pages,
+				'page_no'   => (int) $query_args['page'],
+			);
+
+			if ( TimeInterval::intervals_missing( $expected_interval_count, $db_interval_count, $params['per_page'], $query_args['page'], $query_args['order'], $query_args['orderby'], count( $intervals ) ) ) {
+				$this->fill_in_missing_intervals( $db_intervals, $query_args['adj_after'], $query_args['adj_before'], $query_args['interval'], $data );
+				$this->sort_intervals( $data, $query_args['orderby'], $query_args['order'] );
+				$this->remove_extra_records( $data, $query_args['page'], $params['per_page'], $db_interval_count, $expected_interval_count, $query_args['orderby'], $query_args['order'] );
+			} else {
+				$this->update_interval_boundary_dates( $query_args['after'], $query_args['before'], $query_args['interval'], $data->intervals );
+			}
+			$segmenter->add_intervals_segments( $data, $intervals_query, $table_name );
+			$this->create_interval_subtotals( $data->intervals );
+			$this->set_cached_data( $cache_key, $data );
+		}
+		return $data;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		unset( $this->subquery );
+		$this->total_query = new SqlQuery( $this->context . '_total' );
+		$this->total_query->add_sql_clause( 'from', self::get_db_table_name() );
+
+		$this->interval_query = new SqlQuery( $this->context . '_interval' );
+		$this->interval_query->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->interval_query->add_sql_clause( 'group_by', 'time_interval' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Taxes/Stats/Query.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Class for parameter-based Taxes Stats Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'page'         => 2,
+ *          'categories'   => array(15, 18),
+ *          'product_ids'  => array(1,2,3)
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Taxes\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Taxes report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get tax stats data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_taxes_stats_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-taxes-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_taxes_stats_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Taxes/Stats/Segmenter.php

@@ -0,0 +1,151 @@
+<?php
+/**
+ * Class for adding segmenting support without cluttering the data stores.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Taxes\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Segmenter as ReportsSegmenter;
+
+/**
+ * Date & time interval and numeric range handling class for Reporting API.
+ */
+class Segmenter extends ReportsSegmenter {
+
+	/**
+	 * Returns column => query mapping to be used for order-related order-level segmenting query (e.g. tax_rate_id).
+	 *
+	 * @param string $lookup_table Name of SQL table containing the order-level segmenting info.
+	 *
+	 * @return array Column => SELECT query mapping.
+	 */
+	protected function get_segment_selections_order_level( $lookup_table ) {
+		$columns_mapping = array(
+			'tax_codes'    => "COUNT(DISTINCT $lookup_table.tax_rate_id) as tax_codes",
+			'total_tax'    => "SUM($lookup_table.total_tax) AS total_tax",
+			'order_tax'    => "SUM($lookup_table.order_tax) as order_tax",
+			'shipping_tax' => "SUM($lookup_table.shipping_tax) as shipping_tax",
+			'orders_count' => "COUNT(DISTINCT $lookup_table.order_id) as orders_count",
+		);
+
+		return $columns_mapping;
+	}
+
+	/**
+	 * Calculate segments for totals query where the segmenting property is bound to order (e.g. coupon or customer type).
+	 *
+	 * @param string $segmenting_select SELECT part of segmenting SQL query.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $totals_query Array of SQL clauses for intervals query.
+	 *
+	 * @return array
+	 */
+	protected function get_order_related_totals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $totals_query ) {
+		global $wpdb;
+
+		$totals_segments = $wpdb->get_results(
+			"SELECT
+						$segmenting_groupby
+						$segmenting_select
+					FROM
+						$table_name
+						$segmenting_from
+						{$totals_query['from_clause']}
+					WHERE
+						1=1
+						{$totals_query['where_time_clause']}
+						{$totals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						$segmenting_groupby",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		// Reformat result.
+		$totals_segments = $this->reformat_totals_segments( $totals_segments, $segmenting_groupby );
+		return $totals_segments;
+	}
+
+	/**
+	 * Calculate segments for intervals query where the segmenting property is bound to order (e.g. coupon or customer type).
+	 *
+	 * @param string $segmenting_select SELECT part of segmenting SQL query.
+	 * @param string $segmenting_from FROM part of segmenting SQL query.
+	 * @param string $segmenting_where WHERE part of segmenting SQL query.
+	 * @param string $segmenting_groupby GROUP BY part of segmenting SQL query.
+	 * @param string $table_name Name of SQL table which is the stats table for orders.
+	 * @param array  $intervals_query Array of SQL clauses for intervals query.
+	 *
+	 * @return array
+	 */
+	protected function get_order_related_intervals_segments( $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $intervals_query ) {
+		global $wpdb;
+		$segmenting_limit = '';
+		$limit_parts      = explode( ',', $intervals_query['limit'] );
+		if ( 2 === count( $limit_parts ) ) {
+			$orig_rowcount    = intval( $limit_parts[1] );
+			$segmenting_limit = $limit_parts[0] . ',' . $orig_rowcount * count( $this->get_all_segments() );
+		}
+
+		$intervals_segments = $wpdb->get_results(
+			"SELECT
+						MAX($table_name.date_created) AS datetime_anchor,
+						{$intervals_query['select_clause']} AS time_interval,
+						$segmenting_groupby
+						$segmenting_select
+					FROM
+						$table_name
+						$segmenting_from
+						{$intervals_query['from_clause']}
+					WHERE
+						1=1
+						{$intervals_query['where_time_clause']}
+						{$intervals_query['where_clause']}
+						$segmenting_where
+					GROUP BY
+						time_interval, $segmenting_groupby
+					$segmenting_limit",
+			ARRAY_A
+		); // WPCS: cache ok, DB call ok, unprepared SQL ok.
+
+		// Reformat result.
+		$intervals_segments = $this->reformat_intervals_segments( $intervals_segments, $segmenting_groupby );
+		return $intervals_segments;
+	}
+
+	/**
+	 * Return array of segments formatted for REST response.
+	 *
+	 * @param string $type Type of segments to return--'totals' or 'intervals'.
+	 * @param array  $query_params SQL query parameter array.
+	 * @param string $table_name Name of main SQL table for the data store (used as basis for JOINS).
+	 *
+	 * @return array
+	 * @throws \Automattic\WooCommerce\Admin\API\Reports\ParameterException In case of segmenting by variations, when no parent product is specified.
+	 */
+	protected function get_segments( $type, $query_params, $table_name ) {
+		if ( ! isset( $this->query_args['segmentby'] ) || '' === $this->query_args['segmentby'] ) {
+			return array();
+		}
+
+		$segmenting_where = '';
+		$segmenting_from  = '';
+		$segments         = array();
+
+		if ( 'tax_rate_id' === $this->query_args['segmentby'] ) {
+			$tax_rate_level_columns = $this->get_segment_selections_order_level( $table_name );
+			$segmenting_select      = $this->prepare_selections( $tax_rate_level_columns );
+			$this->report_columns   = $tax_rate_level_columns;
+			$segmenting_groupby     = $table_name . '.tax_rate_id';
+
+			$segments = $this->get_order_related_segments( $type, $segmenting_select, $segmenting_from, $segmenting_where, $segmenting_groupby, $table_name, $query_params );
+		}
+
+		return $segments;
+	}
+}

packages/woocommerce-admin/src/API/Reports/TimeInterval.php

@@ -0,0 +1,635 @@
+<?php
+/**
+ * Class for time interval and numeric range handling for reports.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Date & time interval and numeric range handling class for Reporting API.
+ */
+class TimeInterval {
+
+	/**
+	 * Format string for ISO DateTime formatter.
+	 *
+	 * @var string
+	 */
+	public static $iso_datetime_format = 'Y-m-d\TH:i:s';
+
+	/**
+	 * Format string for use in SQL queries.
+	 *
+	 * @var string
+	 */
+	public static $sql_datetime_format = 'Y-m-d H:i:s';
+
+	/**
+	 * Converts local datetime to GMT/UTC time.
+	 *
+	 * @param string $datetime_string String representation of local datetime.
+	 * @return DateTime
+	 */
+	public static function convert_local_datetime_to_gmt( $datetime_string ) {
+		$datetime = new \DateTime( $datetime_string, new \DateTimeZone( wc_timezone_string() ) );
+		$datetime->setTimezone( new \DateTimeZone( 'GMT' ) );
+		return $datetime;
+	}
+
+	/**
+	 * Returns default 'before' parameter for the reports.
+	 *
+	 * @return DateTime
+	 */
+	public static function default_before() {
+		$datetime = new \WC_DateTime();
+		// Set local timezone or offset.
+		if ( get_option( 'timezone_string' ) ) {
+			$datetime->setTimezone( new \DateTimeZone( wc_timezone_string() ) );
+		} else {
+			$datetime->set_utc_offset( wc_timezone_offset() );
+		}
+		return $datetime;
+	}
+
+	/**
+	 * Returns default 'after' parameter for the reports.
+	 *
+	 * @return DateTime
+	 */
+	public static function default_after() {
+		$now       = time();
+		$week_back = $now - WEEK_IN_SECONDS;
+
+		$datetime = new \WC_DateTime();
+		$datetime->setTimestamp( $week_back );
+		// Set local timezone or offset.
+		if ( get_option( 'timezone_string' ) ) {
+			$datetime->setTimezone( new \DateTimeZone( wc_timezone_string() ) );
+		} else {
+			$datetime->set_utc_offset( wc_timezone_offset() );
+		}
+		return $datetime;
+	}
+
+	/**
+	 * Returns date format to be used as grouping clause in SQL.
+	 *
+	 * @param string $time_interval Time interval.
+	 * @param string $table_name Name of the db table relevant for the date constraint.
+	 * @return mixed
+	 */
+	public static function db_datetime_format( $time_interval, $table_name ) {
+		$first_day_of_week = absint( get_option( 'start_of_week' ) );
+
+		if ( 1 === $first_day_of_week ) {
+			// Week begins on Monday, ISO 8601.
+			$week_format = "DATE_FORMAT({$table_name}.date_created, '%x-%v')";
+		} else {
+			// Week begins on day other than specified by ISO 8601, needs to be in sync with function simple_week_number.
+			$week_format = "CONCAT(YEAR({$table_name}.date_created), '-', LPAD( FLOOR( ( DAYOFYEAR({$table_name}.date_created) + ( ( DATE_FORMAT(MAKEDATE(YEAR({$table_name}.date_created),1), '%w') - $first_day_of_week + 7 ) % 7 ) - 1 ) / 7  ) + 1 , 2, '0'))";
+
+		}
+
+		// Whenever this is changed, double check method time_interval_id to make sure they are in sync.
+		$mysql_date_format_mapping = array(
+			'hour'    => "DATE_FORMAT({$table_name}.date_created, '%Y-%m-%d %H')",
+			'day'     => "DATE_FORMAT({$table_name}.date_created, '%Y-%m-%d')",
+			'week'    => $week_format,
+			'month'   => "DATE_FORMAT({$table_name}.date_created, '%Y-%m')",
+			'quarter' => "CONCAT(YEAR({$table_name}.date_created), '-', QUARTER({$table_name}.date_created))",
+			'year'    => "YEAR({$table_name}.date_created)",
+
+		);
+
+		return $mysql_date_format_mapping[ $time_interval ];
+	}
+
+	/**
+	 * Returns quarter for the DateTime.
+	 *
+	 * @param DateTime $datetime Local date & time.
+	 * @return int|null
+	 */
+	public static function quarter( $datetime ) {
+		switch ( (int) $datetime->format( 'm' ) ) {
+			case 1:
+			case 2:
+			case 3:
+				return 1;
+			case 4:
+			case 5:
+			case 6:
+				return 2;
+			case 7:
+			case 8:
+			case 9:
+				return 3;
+			case 10:
+			case 11:
+			case 12:
+				return 4;
+
+		}
+		return null;
+	}
+
+	/**
+	 * Returns simple week number for the DateTime, for week starting on $first_day_of_week.
+	 *
+	 * The first week of the year is considered to be the week containing January 1.
+	 * The second week starts on the next $first_day_of_week.
+	 *
+	 * @param DateTime $datetime          Local date for which the week number is to be calculated.
+	 * @param int      $first_day_of_week 0 for Sunday to 6 for Saturday.
+	 * @return int
+	 */
+	public static function simple_week_number( $datetime, $first_day_of_week ) {
+		$beg_of_year_day          = new \DateTime( "{$datetime->format('Y')}-01-01" );
+		$adj_day_beg_of_year      = ( (int) $beg_of_year_day->format( 'w' ) - $first_day_of_week + 7 ) % 7;
+		$days_since_start_of_year = (int) $datetime->format( 'z' ) + 1;
+
+		return (int) floor( ( ( $days_since_start_of_year + $adj_day_beg_of_year - 1 ) / 7 ) ) + 1;
+	}
+
+	/**
+	 * Returns ISO 8601 week number for the DateTime, if week starts on Monday,
+	 * otherwise returns simple week number.
+	 *
+	 * @see TimeInterval::simple_week_number()
+	 *
+	 * @param DateTime $datetime          Local date for which the week number is to be calculated.
+	 * @param int      $first_day_of_week 0 for Sunday to 6 for Saturday.
+	 * @return int
+	 */
+	public static function week_number( $datetime, $first_day_of_week ) {
+		if ( 1 === $first_day_of_week ) {
+			$week_number = (int) $datetime->format( 'W' );
+		} else {
+			$week_number = self::simple_week_number( $datetime, $first_day_of_week );
+		}
+		return $week_number;
+	}
+
+	/**
+	 * Returns time interval id for the DateTime.
+	 *
+	 * @param string   $time_interval Time interval type (week, day, etc).
+	 * @param DateTime $datetime      Date & time.
+	 * @return string
+	 */
+	public static function time_interval_id( $time_interval, $datetime ) {
+		// Whenever this is changed, double check method db_datetime_format to make sure they are in sync.
+		$php_time_format_for = array(
+			'hour'    => 'Y-m-d H',
+			'day'     => 'Y-m-d',
+			'week'    => 'o-W',
+			'month'   => 'Y-m',
+			'quarter' => 'Y-' . self::quarter( $datetime ),
+			'year'    => 'Y',
+		);
+
+		// If the week does not begin on Monday.
+		$first_day_of_week = absint( get_option( 'start_of_week' ) );
+
+		if ( 'week' === $time_interval && 1 !== $first_day_of_week ) {
+			$week_no = self::simple_week_number( $datetime, $first_day_of_week );
+			$week_no = str_pad( $week_no, 2, '0', STR_PAD_LEFT );
+			$year_no = $datetime->format( 'Y' );
+			return "$year_no-$week_no";
+		}
+
+		return $datetime->format( $php_time_format_for[ $time_interval ] );
+	}
+
+	/**
+	 * Calculates number of time intervals between two dates, closed interval on both sides.
+	 *
+	 * @param DateTime $start_datetime Start date & time.
+	 * @param DateTime $end_datetime End date & time.
+	 * @param string   $interval Time interval increment, e.g. hour, day, week.
+	 *
+	 * @return int
+	 */
+	public static function intervals_between( $start_datetime, $end_datetime, $interval ) {
+		switch ( $interval ) {
+			case 'hour':
+				$end_timestamp   = (int) $end_datetime->format( 'U' );
+				$start_timestamp = (int) $start_datetime->format( 'U' );
+				$addendum        = 0;
+				// modulo HOUR_IN_SECONDS would normally work, but there are non-full hour timezones, e.g. Nepal.
+				$start_min_sec = (int) $start_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $start_datetime->format( 's' );
+				$end_min_sec   = (int) $end_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $end_datetime->format( 's' );
+				if ( $end_min_sec < $start_min_sec ) {
+					$addendum = 1;
+				}
+				$diff_timestamp = $end_timestamp - $start_timestamp;
+
+				return (int) floor( ( (int) $diff_timestamp ) / HOUR_IN_SECONDS ) + 1 + $addendum;
+			case 'day':
+				$end_timestamp      = (int) $end_datetime->format( 'U' );
+				$start_timestamp    = (int) $start_datetime->format( 'U' );
+				$addendum           = 0;
+				$end_hour_min_sec   = (int) $end_datetime->format( 'H' ) * HOUR_IN_SECONDS + (int) $end_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $end_datetime->format( 's' );
+				$start_hour_min_sec = (int) $start_datetime->format( 'H' ) * HOUR_IN_SECONDS + (int) $start_datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $start_datetime->format( 's' );
+				if ( $end_hour_min_sec < $start_hour_min_sec ) {
+					$addendum = 1;
+				}
+				$diff_timestamp = $end_timestamp - $start_timestamp;
+
+				return (int) floor( ( (int) $diff_timestamp ) / DAY_IN_SECONDS ) + 1 + $addendum;
+			case 'week':
+				// @todo Optimize? approximately day count / 7, but year end is tricky, a week can have fewer days.
+				$week_count = 0;
+				do {
+					$start_datetime = self::next_week_start( $start_datetime );
+					$week_count++;
+				} while ( $start_datetime <= $end_datetime );
+				return $week_count;
+			case 'month':
+				// Year diff in months: (end_year - start_year - 1) * 12.
+				$year_diff_in_months = ( (int) $end_datetime->format( 'Y' ) - (int) $start_datetime->format( 'Y' ) - 1 ) * 12;
+				// All the months in end_date year plus months from X to 12 in the start_date year.
+				$month_diff = (int) $end_datetime->format( 'n' ) + ( 12 - (int) $start_datetime->format( 'n' ) );
+				// Add months for number of years between end_date and start_date.
+				$month_diff += $year_diff_in_months + 1;
+				return $month_diff;
+			case 'quarter':
+				// Year diff in quarters: (end_year - start_year - 1) * 4.
+				$year_diff_in_quarters = ( (int) $end_datetime->format( 'Y' ) - (int) $start_datetime->format( 'Y' ) - 1 ) * 4;
+				// All the quarters in end_date year plus quarters from X to 4 in the start_date year.
+				$quarter_diff = self::quarter( $end_datetime ) + ( 4 - self::quarter( $start_datetime ) );
+				// Add quarters for number of years between end_date and start_date.
+				$quarter_diff += $year_diff_in_quarters + 1;
+				return $quarter_diff;
+			case 'year':
+				$year_diff = (int) $end_datetime->format( 'Y' ) - (int) $start_datetime->format( 'Y' );
+				return $year_diff + 1;
+		}
+		return 0;
+	}
+
+	/**
+	 * Returns a new DateTime object representing the next hour start/previous hour end if reversed.
+	 *
+	 * @param DateTime $datetime Date and time.
+	 * @param bool     $reversed Going backwards in time instead of forward.
+	 * @return DateTime
+	 */
+	public static function next_hour_start( $datetime, $reversed = false ) {
+		$hour_increment         = $reversed ? 0 : 1;
+		$timestamp              = (int) $datetime->format( 'U' );
+		$seconds_into_hour      = (int) $datetime->format( 'i' ) * MINUTE_IN_SECONDS + (int) $datetime->format( 's' );
+		$hours_offset_timestamp = $timestamp + ( $hour_increment * HOUR_IN_SECONDS - $seconds_into_hour );
+
+		if ( $reversed ) {
+			$hours_offset_timestamp --;
+		}
+
+		$hours_offset_time = new \DateTime();
+		$hours_offset_time->setTimestamp( $hours_offset_timestamp );
+		$hours_offset_time->setTimezone( new \DateTimeZone( wc_timezone_string() ) );
+		return $hours_offset_time;
+	}
+
+	/**
+	 * Returns a new DateTime object representing the next day start, or previous day end if reversed.
+	 *
+	 * @param DateTime $datetime Date and time.
+	 * @param bool     $reversed Going backwards in time instead of forward.
+	 * @return DateTime
+	 */
+	public static function next_day_start( $datetime, $reversed = false ) {
+		$oneday       = new \DateInterval( 'P1D' );
+		$new_datetime = clone $datetime;
+
+		if ( $reversed ) {
+			$new_datetime->sub( $oneday );
+			$new_datetime->setTime( 23, 59, 59 );
+		} else {
+			$new_datetime->add( $oneday );
+			$new_datetime->setTime( 0, 0, 0 );
+		}
+
+		return $new_datetime;
+	}
+
+	/**
+	 * Returns DateTime object representing the next week start, or previous week end if reversed.
+	 *
+	 * @param DateTime $datetime Date and time.
+	 * @param bool     $reversed Going backwards in time instead of forward.
+	 * @return DateTime
+	 */
+	public static function next_week_start( $datetime, $reversed = false ) {
+		$first_day_of_week = absint( get_option( 'start_of_week' ) );
+		$initial_week_no   = self::week_number( $datetime, $first_day_of_week );
+		$failsafe_count    = 0;
+
+		do {
+			if ( $failsafe_count++ >= 7 ) {
+				break;
+			}
+			$datetime        = self::next_day_start( $datetime, $reversed );
+			$current_week_no = self::week_number( $datetime, $first_day_of_week );
+		} while ( $current_week_no === $initial_week_no );
+
+		// The week boundary is actually next midnight when going in reverse, so set it to day -1 at 23:59:59.
+		if ( $reversed ) {
+			$timestamp            = (int) $datetime->format( 'U' );
+			$end_of_day_timestamp = floor( $timestamp / DAY_IN_SECONDS ) * DAY_IN_SECONDS + DAY_IN_SECONDS - 1;
+			$datetime->setTimestamp( $end_of_day_timestamp );
+		}
+
+		return $datetime;
+	}
+
+	/**
+	 * Returns a new DateTime object representing the next month start, or previous month end if reversed.
+	 *
+	 * @param DateTime $datetime Date and time.
+	 * @param bool     $reversed Going backwards in time instead of forward.
+	 * @return DateTime
+	 */
+	public static function next_month_start( $datetime, $reversed = false ) {
+		$month_increment = 1;
+		$year            = $datetime->format( 'Y' );
+		$month           = (int) $datetime->format( 'm' );
+
+		if ( $reversed ) {
+			$beg_of_month_datetime       = new \DateTime( "$year-$month-01 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
+			$timestamp                   = (int) $beg_of_month_datetime->format( 'U' );
+			$end_of_prev_month_timestamp = $timestamp - 1;
+			$datetime->setTimestamp( $end_of_prev_month_timestamp );
+		} else {
+			$month += $month_increment;
+			if ( $month > 12 ) {
+				$month = 1;
+				$year ++;
+			}
+			$day      = '01';
+			$datetime = new \DateTime( "$year-$month-$day 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
+		}
+
+		return $datetime;
+	}
+
+	/**
+	 * Returns a new DateTime object representing the next quarter start, or previous quarter end if reversed.
+	 *
+	 * @param DateTime $datetime Date and time.
+	 * @param bool     $reversed Going backwards in time instead of forward.
+	 * @return DateTime
+	 */
+	public static function next_quarter_start( $datetime, $reversed = false ) {
+		$year  = $datetime->format( 'Y' );
+		$month = (int) $datetime->format( 'n' );
+
+		switch ( $month ) {
+			case 1:
+			case 2:
+			case 3:
+				if ( $reversed ) {
+					$month = 1;
+				} else {
+					$month = 4;
+				}
+				break;
+			case 4:
+			case 5:
+			case 6:
+				if ( $reversed ) {
+					$month = 4;
+				} else {
+					$month = 7;
+				}
+				break;
+			case 7:
+			case 8:
+			case 9:
+				if ( $reversed ) {
+					$month = 7;
+				} else {
+					$month = 10;
+				}
+				break;
+			case 10:
+			case 11:
+			case 12:
+				if ( $reversed ) {
+					$month = 10;
+				} else {
+					$month = 1;
+					$year ++;
+				}
+				break;
+		}
+		$datetime = new \DateTime( "$year-$month-01 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
+		if ( $reversed ) {
+			$timestamp                   = (int) $datetime->format( 'U' );
+			$end_of_prev_month_timestamp = $timestamp - 1;
+			$datetime->setTimestamp( $end_of_prev_month_timestamp );
+		}
+
+		return $datetime;
+	}
+
+	/**
+	 * Return a new DateTime object representing the next year start, or previous year end if reversed.
+	 *
+	 * @param DateTime $datetime Date and time.
+	 * @param bool     $reversed Going backwards in time instead of forward.
+	 * @return DateTime
+	 */
+	public static function next_year_start( $datetime, $reversed = false ) {
+		$year_increment = 1;
+		$year           = (int) $datetime->format( 'Y' );
+		$month          = '01';
+		$day            = '01';
+
+		if ( $reversed ) {
+			$datetime                   = new \DateTime( "$year-$month-$day 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
+			$timestamp                  = (int) $datetime->format( 'U' );
+			$end_of_prev_year_timestamp = $timestamp - 1;
+			$datetime->setTimestamp( $end_of_prev_year_timestamp );
+		} else {
+			$year    += $year_increment;
+			$datetime = new \DateTime( "$year-$month-$day 00:00:00", new \DateTimeZone( wc_timezone_string() ) );
+		}
+
+		return $datetime;
+	}
+
+	/**
+	 * Returns beginning of next time interval for provided DateTime.
+	 *
+	 * E.g. for current DateTime, beginning of next day, week, quarter, etc.
+	 *
+	 * @param DateTime $datetime      Date and time.
+	 * @param string   $time_interval Time interval, e.g. week, day, hour.
+	 * @param bool     $reversed Going backwards in time instead of forward.
+	 * @return DateTime
+	 */
+	public static function iterate( $datetime, $time_interval, $reversed = false ) {
+		return call_user_func( array( __CLASS__, "next_{$time_interval}_start" ), $datetime, $reversed );
+	}
+
+	/**
+	 * Returns expected number of items on the page in case of date ordering.
+	 *
+	 * @param int $expected_interval_count Expected number of intervals in total.
+	 * @param int $items_per_page          Number of items per page.
+	 * @param int $page_no                 Page number.
+	 *
+	 * @return float|int
+	 */
+	public static function expected_intervals_on_page( $expected_interval_count, $items_per_page, $page_no ) {
+		$total_pages = (int) ceil( $expected_interval_count / $items_per_page );
+		if ( $page_no < $total_pages ) {
+			return $items_per_page;
+		} elseif ( $page_no === $total_pages ) {
+			return $expected_interval_count - ( $page_no - 1 ) * $items_per_page;
+		} else {
+			return 0;
+		}
+	}
+
+	/**
+	 * Returns true if there are any intervals that need to be filled in the response.
+	 *
+	 * @param int    $expected_interval_count Expected number of intervals in total.
+	 * @param int    $db_records              Total number of records for given period in the database.
+	 * @param int    $items_per_page          Number of items per page.
+	 * @param int    $page_no                 Page number.
+	 * @param string $order                   asc or desc.
+	 * @param string $order_by                Column by which the result will be sorted.
+	 * @param int    $intervals_count         Number of records for given (possibly shortened) time interval.
+	 *
+	 * @return bool
+	 */
+	public static function intervals_missing( $expected_interval_count, $db_records, $items_per_page, $page_no, $order, $order_by, $intervals_count ) {
+		if ( $expected_interval_count <= $db_records ) {
+			return false;
+		}
+		if ( 'date' === $order_by ) {
+			$expected_intervals_on_page = self::expected_intervals_on_page( $expected_interval_count, $items_per_page, $page_no );
+			return $intervals_count < $expected_intervals_on_page;
+		}
+		if ( 'desc' === $order ) {
+			return $page_no > floor( $db_records / $items_per_page );
+		}
+		if ( 'asc' === $order ) {
+			return $page_no <= ceil( ( $expected_interval_count - $db_records ) / $items_per_page );
+		}
+		// Invalid ordering.
+		return false;
+	}
+
+	/**
+	 * Normalize "*_between" parameters to "*_min" and "*_max" for numeric values
+	 * and "*_after" and "*_before" for date values.
+	 *
+	 * @param array        $request Query params from REST API request.
+	 * @param string|array $param_names One or more param names to handle. Should not include "_between" suffix.
+	 * @param bool         $is_date Boolean if the param is date is related.
+	 * @return array Normalized query values.
+	 */
+	public static function normalize_between_params( $request, $param_names, $is_date ) {
+		if ( ! is_array( $param_names ) ) {
+			$param_names = array( $param_names );
+		}
+
+		$normalized = array();
+
+		foreach ( $param_names as $param_name ) {
+			if ( ! is_array( $request[ $param_name . '_between' ] ) ) {
+				continue;
+			}
+
+			$range = $request[ $param_name . '_between' ];
+
+			if ( 2 !== count( $range ) ) {
+				continue;
+			}
+
+			$min = $is_date ? '_after' : '_min';
+			$max = $is_date ? '_before' : '_max';
+
+			if ( $range[0] < $range[1] ) {
+				$normalized[ $param_name . $min ] = $range[0];
+				$normalized[ $param_name . $max ] = $range[1];
+			} else {
+				$normalized[ $param_name . $min ] = $range[1];
+				$normalized[ $param_name . $max ] = $range[0];
+			}
+		}
+
+		return $normalized;
+	}
+
+	/**
+	 * Validate a "*_between" range argument (an array with 2 numeric items).
+	 *
+	 * @param  mixed           $value Parameter value.
+	 * @param  WP_REST_Request $request REST Request.
+	 * @param  string          $param Parameter name.
+	 * @return WP_Error|boolean
+	 */
+	public static function rest_validate_between_numeric_arg( $value, $request, $param ) {
+		if ( ! wp_is_numeric_array( $value ) ) {
+			return new \WP_Error(
+				'rest_invalid_param',
+				/* translators: 1: parameter name */
+				sprintf( __( '%1$s is not a numerically indexed array.', 'woocommerce' ), $param )
+			);
+		}
+
+		if (
+			2 !== count( $value ) ||
+			! is_numeric( $value[0] ) ||
+			! is_numeric( $value[1] )
+		) {
+			return new \WP_Error(
+				'rest_invalid_param',
+				/* translators: %s: parameter name */
+				sprintf( __( '%s must contain 2 numbers.', 'woocommerce' ), $param )
+			);
+		}
+
+		return true;
+	}
+
+	/**
+	 * Validate a "*_between" range argument (an array with 2 date items).
+	 *
+	 * @param  mixed           $value Parameter value.
+	 * @param  WP_REST_Request $request REST Request.
+	 * @param  string          $param Parameter name.
+	 * @return WP_Error|boolean
+	 */
+	public static function rest_validate_between_date_arg( $value, $request, $param ) {
+		if ( ! wp_is_numeric_array( $value ) ) {
+			return new \WP_Error(
+				'rest_invalid_param',
+				/* translators: 1: parameter name */
+				sprintf( __( '%1$s is not a numerically indexed array.', 'woocommerce' ), $param )
+			);
+		}
+
+		if (
+			2 !== count( $value ) ||
+			! rest_parse_date( $value[0] ) ||
+			! rest_parse_date( $value[1] )
+		) {
+			return new \WP_Error(
+				'rest_invalid_param',
+				/* translators: %s: parameter name */
+				sprintf( __( '%s must contain 2 valid dates.', 'woocommerce' ), $param )
+			);
+		}
+
+		return true;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Variations/Controller.php

@@ -0,0 +1,449 @@
+<?php
+/**
+ * REST API Reports products controller
+ *
+ * Handles requests to the /reports/products endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Variations;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Controller as ReportsController;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\ExportableTraits;
+
+/**
+ * REST API Reports products controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends ReportsController implements ExportableInterface {
+	/**
+	 * Exportable traits.
+	 */
+	use ExportableTraits;
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/variations';
+
+	/**
+	 * Mapping between external parameter name and name used in query class.
+	 *
+	 * @var array
+	 */
+	protected $param_mapping = array(
+		'variations' => 'variation_includes',
+	);
+
+	/**
+	 * Get items.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 *
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$args       = array();
+		$registered = array_keys( $this->get_collection_params() );
+		foreach ( $registered as $param_name ) {
+			if ( isset( $request[ $param_name ] ) ) {
+				if ( isset( $this->param_mapping[ $param_name ] ) ) {
+					$args[ $this->param_mapping[ $param_name ] ] = $request[ $param_name ];
+				} else {
+					$args[ $param_name ] = $request[ $param_name ];
+				}
+			}
+		}
+
+		$reports       = new Query( $args );
+		$products_data = $reports->get_data();
+
+		$data = array();
+
+		foreach ( $products_data->data as $product_data ) {
+			$item   = $this->prepare_item_for_response( $product_data, $request );
+			$data[] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $data );
+		$response->header( 'X-WP-Total', (int) $products_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $products_data->pages );
+
+		$page      = $products_data->page_no;
+		$max_pages = $products_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+		$response->add_links( $this->prepare_links( $report ) );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_variations', $response, $report, $request );
+	}
+
+	/**
+	 * Prepare links for the request.
+	 *
+	 * @param array $object Object data.
+	 * @return array        Links for the given post.
+	 */
+	protected function prepare_links( $object ) {
+		$links = array(
+			'product'   => array(
+				'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, 'products', $object['product_id'] ) ),
+			),
+			'variation' => array(
+				'href' => rest_url( sprintf( '/%s/%s/%d/%s/%d', $this->namespace, 'products', $object['product_id'], 'variation', $object['variation_id'] ) ),
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_varitations',
+			'type'       => 'object',
+			'properties' => array(
+				'product_id'    => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Product ID.', 'woocommerce' ),
+				),
+				'variation_id'  => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Product ID.', 'woocommerce' ),
+				),
+				'items_sold'    => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Number of items sold.', 'woocommerce' ),
+				),
+				'net_revenue'   => array(
+					'type'        => 'number',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Total Net sales of all items sold.', 'woocommerce' ),
+				),
+				'orders_count'  => array(
+					'type'        => 'integer',
+					'readonly'    => true,
+					'context'     => array( 'view', 'edit' ),
+					'description' => __( 'Number of orders product appeared in.', 'woocommerce' ),
+				),
+				'extended_info' => array(
+					'name'             => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product name.', 'woocommerce' ),
+					),
+					'price'            => array(
+						'type'        => 'number',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product price.', 'woocommerce' ),
+					),
+					'image'            => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product image.', 'woocommerce' ),
+					),
+					'permalink'        => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product link.', 'woocommerce' ),
+					),
+					'attributes'       => array(
+						'type'        => 'array',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product attributes.', 'woocommerce' ),
+					),
+					'stock_status'     => array(
+						'type'        => 'string',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product inventory status.', 'woocommerce' ),
+					),
+					'stock_quantity'   => array(
+						'type'        => 'integer',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product inventory quantity.', 'woocommerce' ),
+					),
+					'low_stock_amount' => array(
+						'type'        => 'integer',
+						'readonly'    => true,
+						'context'     => array( 'view', 'edit' ),
+						'description' => __( 'Product inventory threshold for low stock.', 'woocommerce' ),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                      = array();
+		$params['context']           = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']              = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']          = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']             = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']            = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['match']             = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: status_is, status_is_not, product_includes, product_excludes, coupon_includes, coupon_excludes, customer, categories', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']             = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']           = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'net_revenue',
+				'orders_count',
+				'items_sold',
+				'sku',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_includes']  = array(
+			'description'       => __( 'Limit result set to items that have the specified parent product(s).', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_excludes']  = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified parent product(s).', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['variations']        = array(
+			'description'       => __( 'Limit result to items with specified variation ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['extended_info']     = array(
+			'description'       => __( 'Add additional piece of info about each variation to the report.', 'woocommerce' ),
+			'type'              => 'boolean',
+			'default'           => false,
+			'sanitize_callback' => 'wc_string_to_bool',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['attribute_is']      = array(
+			'description'       => __( 'Limit result set to variations that include the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['attribute_is_not']  = array(
+			'description'       => __( 'Limit result set to variations that don\'t include the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['category_includes'] = array(
+			'description'       => __( 'Limit result set to variations in the specified categories.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['category_excludes'] = array(
+			'description'       => __( 'Limit result set to variations not in the specified categories.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+
+		return $params;
+	}
+
+	/**
+	 * Get stock status column export value.
+	 *
+	 * @param array $status Stock status from report row.
+	 * @return string
+	 */
+	protected function _get_stock_status( $status ) {
+		$statuses = wc_get_product_stock_status_options();
+
+		return isset( $statuses[ $status ] ) ? $statuses[ $status ] : '';
+	}
+
+	/**
+	 * Get the column names for export.
+	 *
+	 * @return array Key value pair of Column ID => Label.
+	 */
+	public function get_export_columns() {
+		$export_columns = array(
+			'product_name' => __( 'Product / Variation title', 'woocommerce' ),
+			'sku'          => __( 'SKU', 'woocommerce' ),
+			'items_sold'   => __( 'Items sold', 'woocommerce' ),
+			'net_revenue'  => __( 'N. Revenue', 'woocommerce' ),
+			'orders_count' => __( 'Orders', 'woocommerce' ),
+		);
+
+		if ( 'yes' === get_option( 'woocommerce_manage_stock' ) ) {
+			$export_columns['stock_status'] = __( 'Status', 'woocommerce' );
+			$export_columns['stock']        = __( 'Stock', 'woocommerce' );
+		}
+
+		return $export_columns;
+	}
+
+	/**
+	 * Get the column values for export.
+	 *
+	 * @param array $item Single report item/row.
+	 * @return array Key value pair of Column ID => Row Value.
+	 */
+	public function prepare_item_for_export( $item ) {
+		$export_item = array(
+			'product_name' => $item['extended_info']['name'],
+			'sku'          => $item['extended_info']['sku'],
+			'items_sold'   => $item['items_sold'],
+			'net_revenue'  => self::csv_number_format( $item['net_revenue'] ),
+			'orders_count' => $item['orders_count'],
+		);
+
+		if ( 'yes' === get_option( 'woocommerce_manage_stock' ) ) {
+			$export_item['stock_status'] = $this->_get_stock_status( $item['extended_info']['stock_status'] );
+			$export_item['stock']        = $item['extended_info']['stock_quantity'];
+		}
+
+		return $export_item;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Variations/DataStore.php

@@ -0,0 +1,425 @@
+<?php
+/**
+ * API\Reports\Variations\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Variations;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\DataStore as ReportsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Variations\DataStore.
+ */
+class DataStore extends ReportsDataStore implements DataStoreInterface {
+
+	/**
+	 * Table used to get the data.
+	 *
+	 * @var string
+	 */
+	protected static $table_name = 'wc_order_product_lookup';
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'variations';
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'date_start'   => 'strval',
+		'date_end'     => 'strval',
+		'product_id'   => 'intval',
+		'variation_id' => 'intval',
+		'items_sold'   => 'intval',
+		'net_revenue'  => 'floatval',
+		'orders_count' => 'intval',
+		'name'         => 'strval',
+		'price'        => 'floatval',
+		'image'        => 'strval',
+		'permalink'    => 'strval',
+		'sku'          => 'strval',
+	);
+
+	/**
+	 * Extended product attributes to include in the data.
+	 *
+	 * @var array
+	 */
+	protected $extended_attributes = array(
+		'name',
+		'price',
+		'image',
+		'permalink',
+		'stock_status',
+		'stock_quantity',
+		'low_stock_amount',
+		'sku',
+	);
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'variations';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'product_id'   => 'product_id',
+			'variation_id' => 'variation_id',
+			'items_sold'   => 'SUM(product_qty) as items_sold',
+			'net_revenue'  => 'SUM(product_net_revenue) AS net_revenue',
+			'orders_count' => "COUNT(DISTINCT {$table_name}.order_id) as orders_count",
+		);
+	}
+
+	/**
+	 * Fills FROM clause of SQL request based on user supplied parameters.
+	 *
+	 * @param array  $query_args Parameters supplied by the user.
+	 * @param string $arg_name   Target of the JOIN sql param.
+	 */
+	protected function add_from_sql_params( $query_args, $arg_name ) {
+		global $wpdb;
+
+		if ( 'sku' !== $query_args['orderby'] ) {
+			return;
+		}
+
+		$table_name = self::get_db_table_name();
+		$join       = "LEFT JOIN {$wpdb->postmeta} AS postmeta ON {$table_name}.variation_id = postmeta.post_id AND postmeta.meta_key = '_sku'";
+
+		if ( 'inner' === $arg_name ) {
+			$this->subquery->add_sql_clause( 'join', $join );
+		} else {
+			$this->add_sql_clause( 'join', $join );
+		}
+	}
+
+	/**
+	 * Generate a subquery for order_item_id based on the attribute filters.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 * @return string
+	 */
+	protected function get_order_item_by_attribute_subquery( $query_args ) {
+		$order_product_lookup_table = self::get_db_table_name();
+		$attribute_subqueries       = $this->get_attribute_subqueries( $query_args, $order_product_lookup_table );
+
+		if ( $attribute_subqueries['join'] && $attribute_subqueries['where'] ) {
+			// Perform a subquery for DISTINCT order items that match our attribute filters.
+			$attr_subquery = new SqlQuery( $this->context . '_attribute_subquery' );
+			$attr_subquery->add_sql_clause( 'select', "DISTINCT {$order_product_lookup_table}.order_item_id" );
+			$attr_subquery->add_sql_clause( 'from', $order_product_lookup_table );
+			$attr_subquery->add_sql_clause( 'where', "AND {$order_product_lookup_table}.variation_id != 0" );
+
+			foreach ( $attribute_subqueries['join'] as $attribute_join ) {
+				$attr_subquery->add_sql_clause( 'join', $attribute_join );
+			}
+
+			$operator = $this->get_match_operator( $query_args );
+			$attr_subquery->add_sql_clause( 'where', 'AND (' . implode( " {$operator} ", $attribute_subqueries['where'] ) . ')' );
+
+			return "AND {$order_product_lookup_table}.order_item_id IN ({$attr_subquery->get_query_statement()})";
+		}
+
+		return false;
+	}
+
+	/**
+	 * Updates the database query with parameters used for Products report: categories and order status.
+	 *
+	 * @param array $query_args Query arguments supplied by the user.
+	 */
+	protected function add_sql_query_params( $query_args ) {
+		global $wpdb;
+		$order_product_lookup_table = self::get_db_table_name();
+		$order_stats_lookup_table   = $wpdb->prefix . 'wc_order_stats';
+		$order_item_meta_table      = $wpdb->prefix . 'woocommerce_order_itemmeta';
+		$where_subquery             = array();
+
+		$this->add_time_period_sql_params( $query_args, $order_product_lookup_table );
+		$this->get_limit_sql_params( $query_args );
+		$this->add_order_by_sql_params( $query_args );
+
+		$included_variations = $this->get_included_variations( $query_args );
+		if ( $included_variations > 0 ) {
+			$this->add_from_sql_params( $query_args, 'outer' );
+		} else {
+			$this->add_from_sql_params( $query_args, 'inner' );
+		}
+
+		$included_products = $this->get_included_products( $query_args );
+		if ( $included_products ) {
+			$this->subquery->add_sql_clause( 'where', "AND {$order_product_lookup_table}.product_id IN ({$included_products})" );
+		}
+
+		$excluded_products = $this->get_excluded_products( $query_args );
+		if ( $excluded_products ) {
+			$this->subquery->add_sql_clause( 'where', "AND {$order_product_lookup_table}.product_id NOT IN ({$excluded_products})" );
+		}
+
+		if ( $included_variations ) {
+			$this->subquery->add_sql_clause( 'where', "AND {$order_product_lookup_table}.variation_id IN ({$included_variations})" );
+		} elseif ( ! $included_products ) {
+			$this->subquery->add_sql_clause( 'where', "AND {$order_product_lookup_table}.variation_id != 0" );
+		}
+
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		if ( $order_status_filter ) {
+			$this->subquery->add_sql_clause( 'join', "JOIN {$order_stats_lookup_table} ON {$order_product_lookup_table}.order_id = {$order_stats_lookup_table}.order_id" );
+			$this->subquery->add_sql_clause( 'where', "AND ( {$order_status_filter} )" );
+		}
+
+		$attribute_order_items_subquery = $this->get_order_item_by_attribute_subquery( $query_args );
+		if ( $attribute_order_items_subquery ) {
+			// JOIN on product lookup if we haven't already.
+			if ( ! $order_status_filter ) {
+				$this->subquery->add_sql_clause( 'join', "JOIN {$order_product_lookup_table} ON {$order_stats_lookup_table}.order_id = {$order_product_lookup_table}.order_id" );
+			}
+
+			// Add subquery for matching attributes to WHERE.
+			$this->subquery->add_sql_clause( 'where', $attribute_order_items_subquery );
+		}
+
+		if ( 0 < count( $where_subquery ) ) {
+			$operator = $this->get_match_operator( $query_args );
+			$this->subquery->add_sql_clause( 'where', 'AND (' . implode( " {$operator} ", $where_subquery ) . ')' );
+		}
+	}
+
+	/**
+	 * Maps ordering specified by the user to columns in the database/fields in the data.
+	 *
+	 * @param string $order_by Sorting criterion.
+	 *
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return self::get_db_table_name() . '.date_created';
+		}
+		if ( 'sku' === $order_by ) {
+			return 'meta_value';
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Enriches the product data with attributes specified by the extended_attributes.
+	 *
+	 * @param array $products_data Product data.
+	 * @param array $query_args Query parameters.
+	 */
+	protected function include_extended_info( &$products_data, $query_args ) {
+		foreach ( $products_data as $key => $product_data ) {
+			$extended_info = new \ArrayObject();
+			if ( $query_args['extended_info'] ) {
+				$extended_attributes = apply_filters( 'woocommerce_rest_reports_variations_extended_attributes', $this->extended_attributes, $product_data );
+				$parent_product      = wc_get_product( $product_data['product_id'] );
+				$attributes          = array();
+
+				// Base extended info off the parent variable product if the variation ID is 0.
+				// This is caused by simple products with prior sales being converted into variable products.
+				// See: https://github.com/woocommerce/woocommerce-admin/issues/2719.
+				$variation_id      = (int) $product_data['variation_id'];
+				$variation_product = ( 0 === $variation_id ) ? $parent_product : wc_get_product( $variation_id );
+
+				// Fall back to the parent product if the variation can't be found.
+				$extended_attributes_product = is_a( $variation_product, 'WC_Product' ) ? $variation_product : $parent_product;
+
+				foreach ( $extended_attributes as $extended_attribute ) {
+					$function = 'get_' . $extended_attribute;
+					if ( is_callable( array( $extended_attributes_product, $function ) ) ) {
+						$value                                = $extended_attributes_product->{$function}();
+						$extended_info[ $extended_attribute ] = $value;
+					}
+				}
+
+				// If this is a variation, add its attributes.
+				// NOTE: We don't fall back to the parent product here because it will include all possible attribute options.
+				if (
+					0 < $variation_id &&
+					is_callable( array( $variation_product, 'get_variation_attributes' ) )
+				) {
+					$variation_attributes = $variation_product->get_variation_attributes();
+
+					foreach ( $variation_attributes as $attribute_name => $attribute ) {
+						$name         = str_replace( 'attribute_', '', $attribute_name );
+						$option_term  = get_term_by( 'slug', $attribute, $name );
+						$attributes[] = array(
+							'id'     => wc_attribute_taxonomy_id_by_name( $name ),
+							'name'   => str_replace( 'pa_', '', $name ),
+							'option' => $option_term && ! is_wp_error( $option_term ) ? $option_term->name : $attribute,
+						);
+					}
+				}
+
+				$extended_info['attributes'] = $attributes;
+
+				// If there is no set low_stock_amount, use the one in user settings.
+				if ( '' === $extended_info['low_stock_amount'] ) {
+					$extended_info['low_stock_amount'] = absint( max( get_option( 'woocommerce_notify_low_stock_amount' ), 1 ) );
+				}
+				$extended_info = $this->cast_numbers( $extended_info );
+			}
+			$products_data[ $key ]['extended_info'] = $extended_info;
+		}
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @param array $query_args Query parameters.
+	 *
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'           => get_option( 'posts_per_page' ),
+			'page'               => 1,
+			'order'              => 'DESC',
+			'orderby'            => 'date',
+			'before'             => TimeInterval::default_before(),
+			'after'              => TimeInterval::default_after(),
+			'fields'             => '*',
+			'product_includes'   => array(),
+			'variation_includes' => array(),
+			'extended_info'      => false,
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$data = (object) array(
+				'data'    => array(),
+				'total'   => 0,
+				'pages'   => 0,
+				'page_no' => 0,
+			);
+
+			$selections          = $this->selected_columns( $query_args );
+			$included_variations =
+				( isset( $query_args['variation_includes'] ) && is_array( $query_args['variation_includes'] ) )
+					? $query_args['variation_includes']
+					: array();
+			$params              = $this->get_limit_params( $query_args );
+			$this->add_sql_query_params( $query_args );
+
+			if ( count( $included_variations ) > 0 ) {
+				$total_results = count( $included_variations );
+				$total_pages   = (int) ceil( $total_results / $params['per_page'] );
+
+				$this->subquery->clear_sql_clause( 'select' );
+				$this->subquery->add_sql_clause( 'select', $selections );
+
+				if ( 'date' === $query_args['orderby'] ) {
+					$this->subquery->add_sql_clause( 'select', ", {$table_name}.date_created" );
+				}
+
+				$fields          = $this->get_fields( $query_args );
+				$join_selections = $this->format_join_selections( $fields, array( 'variation_id' ) );
+				$ids_table       = $this->get_ids_table( $included_variations, 'variation_id' );
+
+				$this->add_sql_clause( 'select', $join_selections );
+				$this->add_sql_clause( 'from', '(' );
+				$this->add_sql_clause( 'from', $this->subquery->get_query_statement() );
+				$this->add_sql_clause( 'from', ") AS {$table_name}" );
+				$this->add_sql_clause(
+					'right_join',
+					"RIGHT JOIN ( {$ids_table} ) AS default_results
+					ON default_results.variation_id = {$table_name}.variation_id"
+				);
+
+				$variations_query = $this->get_query_statement();
+			} else {
+				/* phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared */
+				$db_records_count = (int) $wpdb->get_var(
+					"SELECT COUNT(*) FROM (
+						{$this->subquery->get_query_statement()}
+					) AS tt"
+				);
+				/* phpcs:enable */
+
+				$total_results = $db_records_count;
+				$total_pages   = (int) ceil( $db_records_count / $params['per_page'] );
+
+				if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+					return $data;
+				}
+
+				$this->subquery->clear_sql_clause( 'select' );
+				$this->subquery->add_sql_clause( 'select', $selections );
+				$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+				$this->subquery->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+				$variations_query = $this->subquery->get_query_statement();
+			}
+
+			/* phpcs:disable WordPress.DB.PreparedSQL.NotPrepared */
+			$product_data = $wpdb->get_results(
+				$variations_query,
+				ARRAY_A
+			);
+			/* phpcs:enable */
+
+			if ( null === $product_data ) {
+				return $data;
+			}
+
+			$this->include_extended_info( $product_data, $query_args );
+
+			$product_data = array_map( array( $this, 'cast_numbers' ), $product_data );
+			$data         = (object) array(
+				'data'    => $product_data,
+				'total'   => $total_results,
+				'pages'   => $total_pages,
+				'page_no' => (int) $query_args['page'],
+			);
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		$this->subquery = new SqlQuery( $this->context . '_subquery' );
+		$this->subquery->add_sql_clause( 'select', 'product_id' );
+		$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->subquery->add_sql_clause( 'group_by', 'product_id, variation_id' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Variations/Query.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Class for parameter-based Products Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'page'         => 2,
+ *          'categories'   => array(15, 18),
+ *          'products'     => array(1,2,3)
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Variations\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Variations;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Variations\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Products report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get product data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_variations_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-variations' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_variations_select_query', $results, $args );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Variations/Stats/Controller.php

@@ -0,0 +1,474 @@
+<?php
+/**
+ * REST API Reports variations stats controller
+ *
+ * Handles requests to the /reports/variations/stats endpoint.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Variations\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\ParameterException;
+
+/**
+ * REST API Reports variations stats controller class.
+ *
+ * @extends WC_REST_Reports_Controller
+ */
+class Controller extends \WC_REST_Reports_Controller {
+
+	/**
+	 * Endpoint namespace.
+	 *
+	 * @var string
+	 */
+	protected $namespace = 'wc-analytics';
+
+	/**
+	 * Route base.
+	 *
+	 * @var string
+	 */
+	protected $rest_base = 'reports/variations/stats';
+
+	/**
+	 * Mapping between external parameter name and name used in query class.
+	 *
+	 * @var array
+	 */
+	protected $param_mapping = array(
+		'variations' => 'variation_includes',
+	);
+
+	/**
+	 * Constructor.
+	 */
+	public function __construct() {
+		add_filter( 'woocommerce_analytics_variations_stats_select_query', array( $this, 'set_default_report_data' ) );
+	}
+
+	/**
+	 * Get all reports.
+	 *
+	 * @param WP_REST_Request $request Request data.
+	 * @return array|WP_Error
+	 */
+	public function get_items( $request ) {
+		$query_args = array(
+			'fields' => array(
+				'items_sold',
+				'net_revenue',
+				'orders_count',
+				'variations_count',
+			),
+		);
+
+		$registered = array_keys( $this->get_collection_params() );
+		foreach ( $registered as $param_name ) {
+			if ( isset( $request[ $param_name ] ) ) {
+				if ( isset( $this->param_mapping[ $param_name ] ) ) {
+					$query_args[ $this->param_mapping[ $param_name ] ] = $request[ $param_name ];
+				} else {
+					$query_args[ $param_name ] = $request[ $param_name ];
+				}
+			}
+		}
+
+		$query = new Query( $query_args );
+		try {
+			$report_data = $query->get_data();
+		} catch ( ParameterException $e ) {
+			return new \WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
+		}
+
+		$out_data = array(
+			'totals'    => get_object_vars( $report_data->totals ),
+			'intervals' => array(),
+		);
+
+		foreach ( $report_data->intervals as $interval_data ) {
+			$item                    = $this->prepare_item_for_response( $interval_data, $request );
+			$out_data['intervals'][] = $this->prepare_response_for_collection( $item );
+		}
+
+		$response = rest_ensure_response( $out_data );
+		$response->header( 'X-WP-Total', (int) $report_data->total );
+		$response->header( 'X-WP-TotalPages', (int) $report_data->pages );
+
+		$page      = $report_data->page_no;
+		$max_pages = $report_data->pages;
+		$base      = add_query_arg( $request->get_query_params(), rest_url( sprintf( '/%s/%s', $this->namespace, $this->rest_base ) ) );
+		if ( $page > 1 ) {
+			$prev_page = $page - 1;
+			if ( $prev_page > $max_pages ) {
+				$prev_page = $max_pages;
+			}
+			$prev_link = add_query_arg( 'page', $prev_page, $base );
+			$response->link_header( 'prev', $prev_link );
+		}
+		if ( $max_pages > $page ) {
+			$next_page = $page + 1;
+			$next_link = add_query_arg( 'page', $next_page, $base );
+			$response->link_header( 'next', $next_link );
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Prepare a report object for serialization.
+	 *
+	 * @param Array           $report  Report data.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response
+	 */
+	public function prepare_item_for_response( $report, $request ) {
+		$data = $report;
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object( $data, $request );
+		$data    = $this->filter_response_by_context( $data, $context );
+
+		// Wrap the data in a response object.
+		$response = rest_ensure_response( $data );
+
+		/**
+		 * Filter a report returned from the API.
+		 *
+		 * Allows modification of the report data right before it is returned.
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $report   The original report object.
+		 * @param WP_REST_Request  $request  Request used to generate the response.
+		 */
+		return apply_filters( 'woocommerce_rest_prepare_report_variations_stats', $response, $report, $request );
+	}
+
+	/**
+	 * Get the Report's schema, conforming to JSON Schema.
+	 *
+	 * @return array
+	 */
+	public function get_item_schema() {
+		$data_values = array(
+			'items_sold'   => array(
+				'title'       => __( 'Variations Sold', 'woocommerce' ),
+				'description' => __( 'Number of variation items sold.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'indicator'   => true,
+			),
+			'net_revenue'  => array(
+				'description' => __( 'Net sales.', 'woocommerce' ),
+				'type'        => 'number',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'format'      => 'currency',
+			),
+			'orders_count' => array(
+				'description' => __( 'Number of orders.', 'woocommerce' ),
+				'type'        => 'integer',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+			),
+		);
+
+		$segments = array(
+			'segments' => array(
+				'description' => __( 'Reports data grouped by segment condition.', 'woocommerce' ),
+				'type'        => 'array',
+				'context'     => array( 'view', 'edit' ),
+				'readonly'    => true,
+				'items'       => array(
+					'type'       => 'object',
+					'properties' => array(
+						'segment_id'    => array(
+							'description' => __( 'Segment identificator.', 'woocommerce' ),
+							'type'        => 'integer',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+						),
+						'segment_label' => array(
+							'description' => __( 'Human readable segment label, either product or variation name.', 'woocommerce' ),
+							'type'        => 'string',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'enum'        => array( 'day', 'week', 'month', 'year' ),
+						),
+						'subtotals'     => array(
+							'description' => __( 'Interval subtotals.', 'woocommerce' ),
+							'type'        => 'object',
+							'context'     => array( 'view', 'edit' ),
+							'readonly'    => true,
+							'properties'  => $data_values,
+						),
+					),
+				),
+			),
+		);
+
+		$totals = array_merge( $data_values, $segments );
+
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'report_variations_stats',
+			'type'       => 'object',
+			'properties' => array(
+				'totals'    => array(
+					'description' => __( 'Totals data.', 'woocommerce' ),
+					'type'        => 'object',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'properties'  => $totals,
+				),
+				'intervals' => array(
+					'description' => __( 'Reports data grouped by intervals.', 'woocommerce' ),
+					'type'        => 'array',
+					'context'     => array( 'view', 'edit' ),
+					'readonly'    => true,
+					'items'       => array(
+						'type'       => 'object',
+						'properties' => array(
+							'interval'       => array(
+								'description' => __( 'Type of interval.', 'woocommerce' ),
+								'type'        => 'string',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'enum'        => array( 'day', 'week', 'month', 'year' ),
+							),
+							'date_start'     => array(
+								'description' => __( "The date the report start, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_start_gmt' => array(
+								'description' => __( 'The date the report start, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end'       => array(
+								'description' => __( "The date the report end, in the site's timezone.", 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'date_end_gmt'   => array(
+								'description' => __( 'The date the report end, as GMT.', 'woocommerce' ),
+								'type'        => 'date-time',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+							),
+							'subtotals'      => array(
+								'description' => __( 'Interval subtotals.', 'woocommerce' ),
+								'type'        => 'object',
+								'context'     => array( 'view', 'edit' ),
+								'readonly'    => true,
+								'properties'  => $totals,
+							),
+						),
+					),
+				),
+			),
+		);
+
+		return $this->add_additional_fields_schema( $schema );
+	}
+
+	/**
+	 * Set the default results to 0 if API returns an empty array
+	 *
+	 * @param Mixed $results Report data.
+	 * @return object
+	 */
+	public function set_default_report_data( $results ) {
+		if ( empty( $results ) ) {
+			$results                       = new \stdClass();
+			$results->total                = 0;
+			$results->totals               = new \stdClass();
+			$results->totals->items_sold   = 0;
+			$results->totals->net_revenue  = 0;
+			$results->totals->orders_count = 0;
+			$results->intervals            = array();
+			$results->pages                = 1;
+			$results->page_no              = 1;
+		}
+		return $results;
+	}
+
+	/**
+	 * Get the query params for collections.
+	 *
+	 * @return array
+	 */
+	public function get_collection_params() {
+		$params                      = array();
+		$params['context']           = $this->get_context_param( array( 'default' => 'view' ) );
+		$params['page']              = array(
+			'description'       => __( 'Current page of the collection.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 1,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+			'minimum'           => 1,
+		);
+		$params['per_page']          = array(
+			'description'       => __( 'Maximum number of items to be returned in result set.', 'woocommerce' ),
+			'type'              => 'integer',
+			'default'           => 10,
+			'minimum'           => 1,
+			'maximum'           => 100,
+			'sanitize_callback' => 'absint',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['after']             = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['before']            = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.', 'woocommerce' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['match']             = array(
+			'description'       => __( 'Indicates whether all the conditions should be true for the resulting set, or if any one of them is sufficient. Match affects the following parameters: status_is, status_is_not, product_includes, product_excludes, coupon_includes, coupon_excludes, customer, categories', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'all',
+			'enum'              => array(
+				'all',
+				'any',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['order']             = array(
+			'description'       => __( 'Order sort attribute ascending or descending.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'desc',
+			'enum'              => array( 'asc', 'desc' ),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['orderby']           = array(
+			'description'       => __( 'Sort collection by object attribute.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'date',
+			'enum'              => array(
+				'date',
+				'net_revenue',
+				'coupons',
+				'refunds',
+				'shipping',
+				'taxes',
+				'net_revenue',
+				'orders_count',
+				'items_sold',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['interval']          = array(
+			'description'       => __( 'Time interval to use for buckets in the returned data.', 'woocommerce' ),
+			'type'              => 'string',
+			'default'           => 'week',
+			'enum'              => array(
+				'hour',
+				'day',
+				'week',
+				'month',
+				'quarter',
+				'year',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['category_includes'] = array(
+			'description'       => __( 'Limit result to items from the specified categories.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['category_excludes'] = array(
+			'description'       => __( 'Limit result set to variations not in the specified categories.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['product_includes']  = array(
+			'description'       => __( 'Limit result set to items that have the specified parent product(s).', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['product_excludes']  = array(
+			'description'       => __( 'Limit result set to items that don\'t have the specified parent product(s).', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'integer',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+			'sanitize_callback' => 'wp_parse_id_list',
+		);
+		$params['variations']        = array(
+			'description'       => __( 'Limit result to items with specified variation ids.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_id_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'integer',
+			),
+		);
+		$params['segmentby']         = array(
+			'description'       => __( 'Segment the response by additional constraint.', 'woocommerce' ),
+			'type'              => 'string',
+			'enum'              => array(
+				'product',
+				'category',
+				'variation',
+			),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['fields']            = array(
+			'description'       => __( 'Limit stats fields to the specified items.', 'woocommerce' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
+			'validate_callback' => 'rest_validate_request_arg',
+			'items'             => array(
+				'type' => 'string',
+			),
+		);
+		$params['attribute_is']      = array(
+			'description'       => __( 'Limit result set to orders that include products with the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+		$params['attribute_is_not']  = array(
+			'description'       => __( 'Limit result set to orders that don\'t include products with the specified attributes.', 'woocommerce' ),
+			'type'              => 'array',
+			'items'             => array(
+				'type' => 'array',
+			),
+			'default'           => array(),
+			'validate_callback' => 'rest_validate_request_arg',
+		);
+
+		return $params;
+	}
+}

packages/woocommerce-admin/src/API/Reports/Variations/Stats/DataStore.php

@@ -0,0 +1,285 @@
+<?php
+/**
+ * API\Reports\Products\Stats\DataStore class file.
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Variations\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Variations\DataStore as VariationsDataStore;
+use \Automattic\WooCommerce\Admin\API\Reports\DataStoreInterface;
+use \Automattic\WooCommerce\Admin\API\Reports\TimeInterval;
+use \Automattic\WooCommerce\Admin\API\Reports\SqlQuery;
+
+/**
+ * API\Reports\Variations\Stats\DataStore.
+ */
+class DataStore extends VariationsDataStore implements DataStoreInterface {
+
+	/**
+	 * Mapping columns to data type to return correct response types.
+	 *
+	 * @var array
+	 */
+	protected $column_types = array(
+		'items_sold'       => 'intval',
+		'net_revenue'      => 'floatval',
+		'orders_count'     => 'intval',
+		'variations_count' => 'intval',
+	);
+
+	/**
+	 * Cache identifier.
+	 *
+	 * @var string
+	 */
+	protected $cache_key = 'variations_stats';
+
+	/**
+	 * Data store context used to pass to filters.
+	 *
+	 * @var string
+	 */
+	protected $context = 'variations_stats';
+
+	/**
+	 * Assign report columns once full table name has been assigned.
+	 */
+	protected function assign_report_columns() {
+		$table_name           = self::get_db_table_name();
+		$this->report_columns = array(
+			'items_sold'       => 'SUM(product_qty) as items_sold',
+			'net_revenue'      => 'SUM(product_net_revenue) AS net_revenue',
+			'orders_count'     => "COUNT( DISTINCT ( CASE WHEN product_gross_revenue >= 0 THEN {$table_name}.order_id END ) ) as orders_count",
+			'variations_count' => 'COUNT(DISTINCT variation_id) as variations_count',
+		);
+	}
+
+	/**
+	 * Updates the database query with parameters used for Products Stats report: categories and order status.
+	 *
+	 * @param array $query_args       Query arguments supplied by the user.
+	 */
+	protected function update_sql_query_params( $query_args ) {
+		global $wpdb;
+
+		$products_where_clause      = '';
+		$products_from_clause       = '';
+		$where_subquery             = array();
+		$order_product_lookup_table = self::get_db_table_name();
+		$order_item_meta_table      = $wpdb->prefix . 'woocommerce_order_itemmeta';
+
+		$included_products = $this->get_included_products( $query_args );
+		if ( $included_products ) {
+			$products_where_clause .= " AND {$order_product_lookup_table}.product_id IN ({$included_products})";
+		}
+
+		$excluded_products = $this->get_excluded_products( $query_args );
+		if ( $excluded_products ) {
+			$products_where_clause .= "AND {$order_product_lookup_table}.product_id NOT IN ({$excluded_products})";
+		}
+
+		$included_variations = $this->get_included_variations( $query_args );
+		if ( $included_variations ) {
+			$products_where_clause .= " AND {$order_product_lookup_table}.variation_id IN ({$included_variations})";
+		} else {
+			$products_where_clause .= " AND {$order_product_lookup_table}.variation_id != 0";
+		}
+
+		$order_status_filter = $this->get_status_subquery( $query_args );
+		if ( $order_status_filter ) {
+			$products_from_clause  .= " JOIN {$wpdb->prefix}wc_order_stats ON {$order_product_lookup_table}.order_id = {$wpdb->prefix}wc_order_stats.order_id";
+			$products_where_clause .= " AND ( {$order_status_filter} )";
+		}
+
+		$attribute_order_items_subquery = $this->get_order_item_by_attribute_subquery( $query_args );
+		if ( $attribute_order_items_subquery ) {
+			// JOIN on product lookup if we haven't already.
+			if ( ! $order_status_filter ) {
+				$products_from_clause .= " JOIN {$wpdb->prefix}wc_order_stats ON {$order_product_lookup_table}.order_id = {$wpdb->prefix}wc_order_stats.order_id";
+			}
+
+			// Add subquery for matching attributes to WHERE.
+			$products_where_clause .= $attribute_order_items_subquery;
+		}
+
+		if ( 0 < count( $where_subquery ) ) {
+			$operator               = $this->get_match_operator( $query_args );
+			$products_where_clause .= 'AND (' . implode( " {$operator} ", $where_subquery ) . ')';
+		}
+
+		$this->add_time_period_sql_params( $query_args, $order_product_lookup_table );
+		$this->total_query->add_sql_clause( 'where', $products_where_clause );
+		$this->total_query->add_sql_clause( 'join', $products_from_clause );
+
+		$this->add_intervals_sql_params( $query_args, $order_product_lookup_table );
+		$this->interval_query->add_sql_clause( 'where', $products_where_clause );
+		$this->interval_query->add_sql_clause( 'join', $products_from_clause );
+		$this->interval_query->add_sql_clause( 'select', $this->get_sql_clause( 'select' ) . ' AS time_interval' );
+	}
+
+	/**
+	 * Returns the report data based on parameters supplied by the user.
+	 *
+	 * @since 3.5.0
+	 * @param array $query_args  Query parameters.
+	 * @return stdClass|WP_Error Data.
+	 */
+	public function get_data( $query_args ) {
+		global $wpdb;
+
+		$table_name = self::get_db_table_name();
+
+		// These defaults are only partially applied when used via REST API, as that has its own defaults.
+		$defaults   = array(
+			'per_page'           => get_option( 'posts_per_page' ),
+			'page'               => 1,
+			'order'              => 'DESC',
+			'orderby'            => 'date',
+			'before'             => TimeInterval::default_before(),
+			'after'              => TimeInterval::default_after(),
+			'fields'             => '*',
+			'category_includes'  => array(),
+			'interval'           => 'week',
+			'product_includes'   => array(),
+			'variation_includes' => array(),
+		);
+		$query_args = wp_parse_args( $query_args, $defaults );
+		$this->normalize_timezones( $query_args, $defaults );
+
+		/*
+		 * We need to get the cache key here because
+		 * parent::update_intervals_sql_params() modifies $query_args.
+		 */
+		$cache_key = $this->get_cache_key( $query_args );
+		$data      = $this->get_cached_data( $cache_key );
+
+		if ( false === $data ) {
+			$this->initialize_queries();
+
+			$selections = $this->selected_columns( $query_args );
+			$params     = $this->get_limit_params( $query_args );
+
+			$this->update_sql_query_params( $query_args );
+			$this->get_limit_sql_params( $query_args );
+			$this->interval_query->add_sql_clause( 'where_time', $this->get_sql_clause( 'where_time' ) );
+
+			/* phpcs:disable WordPress.DB.PreparedSQL.NotPrepared */
+			$db_intervals = $wpdb->get_col(
+				$this->interval_query->get_query_statement()
+			);
+			/* phpcs:enable */
+
+			$db_interval_count       = count( $db_intervals );
+			$expected_interval_count = TimeInterval::intervals_between( $query_args['after'], $query_args['before'], $query_args['interval'] );
+			$total_pages             = (int) ceil( $expected_interval_count / $params['per_page'] );
+			if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
+				return array();
+			}
+
+			$intervals = array();
+			$this->update_intervals_sql_params( $query_args, $db_interval_count, $expected_interval_count, $table_name );
+			$this->total_query->add_sql_clause( 'select', $selections );
+			$this->total_query->add_sql_clause( 'where_time', $this->get_sql_clause( 'where_time' ) );
+
+			/* phpcs:disable WordPress.DB.PreparedSQL.NotPrepared */
+			$totals = $wpdb->get_results(
+				$this->total_query->get_query_statement(),
+				ARRAY_A
+			);
+			/* phpcs:enable */
+
+			// @todo remove these assignements when refactoring segmenter classes to use query objects.
+			$totals_query          = array(
+				'from_clause'       => $this->total_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->total_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->total_query->get_sql_clause( 'where' ),
+			);
+			$intervals_query       = array(
+				'select_clause'     => $this->get_sql_clause( 'select' ),
+				'from_clause'       => $this->interval_query->get_sql_clause( 'join' ),
+				'where_time_clause' => $this->interval_query->get_sql_clause( 'where_time' ),
+				'where_clause'      => $this->interval_query->get_sql_clause( 'where' ),
+				'order_by'          => $this->get_sql_clause( 'order_by' ),
+				'limit'             => $this->get_sql_clause( 'limit' ),
+			);
+			$segmenter             = new Segmenter( $query_args, $this->report_columns );
+			$totals[0]['segments'] = $segmenter->get_totals_segments( $totals_query, $table_name );
+
+			if ( null === $totals ) {
+				return new \WP_Error( 'woocommerce_analytics_variations_stats_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ) );
+			}
+
+			$this->interval_query->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
+			$this->interval_query->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
+			$this->interval_query->add_sql_clause( 'select', ", MAX(${table_name}.date_created) AS datetime_anchor" );
+			if ( '' !== $selections ) {
+				$this->interval_query->add_sql_clause( 'select', ', ' . $selections );
+			}
+
+			/* phpcs:disable WordPress.DB.PreparedSQL.NotPrepared */
+			$intervals = $wpdb->get_results(
+				$this->interval_query->get_query_statement(),
+				ARRAY_A
+			);
+			/* phpcs:enable */
+
+			if ( null === $intervals ) {
+				return new \WP_Error( 'woocommerce_analytics_variations_stats_result_failed', __( 'Sorry, fetching revenue data failed.', 'woocommerce' ) );
+			}
+
+			$totals = (object) $this->cast_numbers( $totals[0] );
+
+			$data = (object) array(
+				'totals'    => $totals,
+				'intervals' => $intervals,
+				'total'     => $expected_interval_count,
+				'pages'     => $total_pages,
+				'page_no'   => (int) $query_args['page'],
+			);
+
+			if ( TimeInterval::intervals_missing( $expected_interval_count, $db_interval_count, $params['per_page'], $query_args['page'], $query_args['order'], $query_args['orderby'], count( $intervals ) ) ) {
+				$this->fill_in_missing_intervals( $db_intervals, $query_args['adj_after'], $query_args['adj_before'], $query_args['interval'], $data );
+				$this->sort_intervals( $data, $query_args['orderby'], $query_args['order'] );
+				$this->remove_extra_records( $data, $query_args['page'], $params['per_page'], $db_interval_count, $expected_interval_count, $query_args['orderby'], $query_args['order'] );
+			} else {
+				$this->update_interval_boundary_dates( $query_args['after'], $query_args['before'], $query_args['interval'], $data->intervals );
+			}
+			$segmenter->add_intervals_segments( $data, $intervals_query, $table_name );
+			$this->create_interval_subtotals( $data->intervals );
+
+			$this->set_cached_data( $cache_key, $data );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Normalizes order_by clause to match to SQL query.
+	 *
+	 * @param string $order_by Order by option requeste by user.
+	 * @return string
+	 */
+	protected function normalize_order_by( $order_by ) {
+		if ( 'date' === $order_by ) {
+			return 'time_interval';
+		}
+
+		return $order_by;
+	}
+
+	/**
+	 * Initialize query objects.
+	 */
+	protected function initialize_queries() {
+		$this->clear_all_clauses();
+		unset( $this->subquery );
+		$this->total_query = new SqlQuery( $this->context . '_total' );
+		$this->total_query->add_sql_clause( 'from', self::get_db_table_name() );
+
+		$this->interval_query = new SqlQuery( $this->context . '_interval' );
+		$this->interval_query->add_sql_clause( 'from', self::get_db_table_name() );
+		$this->interval_query->add_sql_clause( 'group_by', 'time_interval' );
+	}
+}

packages/woocommerce-admin/src/API/Reports/Variations/Stats/Query.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * Class for parameter-based Variations Stats Report querying
+ *
+ * Example usage:
+ * $args = array(
+ *          'before'       => '2018-07-19 00:00:00',
+ *          'after'        => '2018-07-05 00:00:00',
+ *          'page'         => 2,
+ *          'categories'   => array(15, 18),
+ *          'product_ids'  => array(1,2,3)
+ *         );
+ * $report = new \Automattic\WooCommerce\Admin\API\Reports\Variations\Stats\Query( $args );
+ * $mydata = $report->get_data();
+ */
+
+namespace Automattic\WooCommerce\Admin\API\Reports\Variations\Stats;
+
+defined( 'ABSPATH' ) || exit;
+
+use \Automattic\WooCommerce\Admin\API\Reports\Query as ReportsQuery;
+
+/**
+ * API\Reports\Variations\Stats\Query
+ */
+class Query extends ReportsQuery {
+
+	/**
+	 * Valid fields for Products report.
+	 *
+	 * @return array
+	 */
+	protected function get_default_query_vars() {
+		return array();
+	}
+
+	/**
+	 * Get variations data based on the current query vars.
+	 *
+	 * @return array
+	 */
+	public function get_data() {
+		$args = apply_filters( 'woocommerce_analytics_variations_stats_query_args', $this->get_query_vars() );
+
+		$data_store = \WC_Data_Store::load( 'report-variations-stats' );
+		$results    = $data_store->get_data( $args );
+		return apply_filters( 'woocommerce_analytics_variations_stats_select_query', $results, $args );
+	}
+
+}