422 lines
14 KiB
PHP
422 lines
14 KiB
PHP
<?php
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/**
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* Actors_Inbox_Controller file.
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*
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* @package Activitypub
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*/
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namespace Activitypub\Rest;
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use Activitypub\Activity\Activity;
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use Activitypub\Activity\Base_Object;
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use Activitypub\Collection\Actors;
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use Activitypub\Collection\Inbox;
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use Activitypub\Moderation;
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use function Activitypub\camel_to_snake_case;
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use function Activitypub\get_masked_wp_version;
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use function Activitypub\get_rest_url_by_path;
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use function Activitypub\object_to_uri;
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/**
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* Actors_Inbox_Controller class.
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*
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* @author Matthias Pfefferle
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*
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* @see https://www.w3.org/TR/activitypub/#inbox
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*/
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class Actors_Inbox_Controller extends Actors_Controller {
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use Collection;
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use Event_Stream;
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use Language_Map;
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/**
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* Register routes.
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*/
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public function register_routes() {
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\register_rest_route(
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$this->namespace,
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'/' . $this->rest_base . '/inbox',
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array(
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'args' => array(
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'user_id' => array(
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'description' => 'The ID of the actor.',
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'type' => 'integer',
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'required' => true,
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'validate_callback' => array( $this, 'validate_user_id' ),
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),
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),
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array(
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'methods' => \WP_REST_Server::READABLE,
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'callback' => array( $this, 'get_items' ),
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'permission_callback' => array( $this, 'verify_authentication' ),
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'args' => array(
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'page' => array(
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'description' => 'Current page of the collection.',
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'type' => 'integer',
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'minimum' => 1,
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// No default so we can differentiate between Collection and CollectionPage requests.
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),
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'per_page' => array(
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'description' => 'Maximum number of items to be returned in result set.',
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'type' => 'integer',
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'default' => 20,
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'minimum' => 1,
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'maximum' => 100,
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),
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),
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'schema' => array( $this, 'get_collection_schema' ),
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),
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array(
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'methods' => \WP_REST_Server::CREATABLE,
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'callback' => array( $this, 'create_item' ),
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'permission_callback' => array( $this, 'verify_signature' ),
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'args' => array(
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'id' => array(
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'description' => 'The unique identifier for the activity.',
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'type' => 'string',
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'format' => 'uri',
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'required' => true,
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),
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'actor' => array(
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'description' => 'The actor performing the activity.',
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'type' => 'string',
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'required' => true,
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'sanitize_callback' => '\Activitypub\object_to_uri',
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),
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'type' => array(
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'description' => 'The type of the activity.',
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'type' => 'string',
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'required' => true,
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'sanitize_callback' => 'sanitize_html_class',
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'validate_callback' => static function ( $param ) {
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// Reject values that sanitize to empty so dynamic hook names always have a suffix.
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return '' !== \sanitize_html_class( (string) $param );
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},
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),
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'object' => array(
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'description' => 'The object of the activity.',
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'required' => true,
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'sanitize_callback' => array( $this, 'localize_language_maps' ),
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'validate_callback' => static function ( $param, $request, $key ) {
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/**
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* Filter the ActivityPub object validation.
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*
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* @param bool $validate The validation result.
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* @param array $param The object data.
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* @param \WP_REST_Request $request The request object.
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* @param string $key The key.
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*/
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return \apply_filters( 'activitypub_validate_object', true, $param, $request, $key );
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},
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),
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),
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),
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'schema' => array( $this, 'get_item_schema' ),
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)
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);
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\register_rest_route(
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$this->namespace,
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'/' . $this->rest_base . '/inbox/stream',
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array(
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'args' => array(
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'user_id' => array(
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'description' => 'The ID of the actor.',
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'type' => 'integer',
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'required' => true,
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'validate_callback' => array( $this, 'validate_user_id' ),
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),
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),
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array(
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'methods' => \WP_REST_Server::READABLE,
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'callback' => function ( $request ) {
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$this->stream_collection( $request->get_param( 'user_id' ), 'inbox' );
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},
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'permission_callback' => array( $this, 'get_stream_permissions_check' ),
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),
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)
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);
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\add_action( 'activitypub_inbox_create_item', array( self::class, 'process_create_item' ) );
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}
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/**
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* Retrieves a collection of inbox items.
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*
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* @param \WP_REST_Request $request Full details about the request.
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* @return \WP_REST_Response|\WP_Error Response object on success, or WP_Error object on failure.
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*/
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public function get_items( $request ) {
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$page = $request->get_param( 'page' ) ?? 1;
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$user_id = $request->get_param( 'user_id' );
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$user = Actors::get_by_id( $user_id );
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if ( \is_wp_error( $user ) ) {
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return $user;
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}
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/**
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* Action triggered prior to the ActivityPub inbox being created and sent to the client.
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*
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* @param \WP_REST_Request $request The request object.
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*/
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\do_action( 'activitypub_rest_inbox_pre', $request );
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$args = array(
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'posts_per_page' => $request->get_param( 'per_page' ),
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'paged' => $page,
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'post_type' => Inbox::POST_TYPE,
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'post_status' => 'publish',
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// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
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'meta_query' => array(
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array(
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'key' => '_activitypub_user_id',
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'value' => $user_id,
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),
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),
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);
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/**
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* Filters WP_Query arguments when querying Inbox items via the REST API.
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*
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* Enables adding extra arguments or setting defaults for an inbox collection request.
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*
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* @param array $args Array of arguments for WP_Query.
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* @param \WP_REST_Request $request The REST API request.
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*/
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$args = \apply_filters( 'activitypub_rest_inbox_query', $args, $request );
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$inbox_query = new \WP_Query();
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$query_result = $inbox_query->query( $args );
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$response = array(
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'@context' => Base_Object::JSON_LD_CONTEXT,
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'id' => get_rest_url_by_path( sprintf( 'actors/%d/inbox', $user_id ) ),
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'generator' => 'https://wordpress.org/?v=' . get_masked_wp_version(),
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'actor' => $user->get_id(),
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'type' => 'OrderedCollection',
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'totalItems' => (int) $inbox_query->found_posts,
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'eventStream' => $this->get_stream_url( $user_id, 'inbox' ),
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'orderedItems' => array(),
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);
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\update_postmeta_cache( \wp_list_pluck( $query_result, 'ID' ) );
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foreach ( $query_result as $inbox_item ) {
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if ( ! $inbox_item instanceof \WP_Post ) {
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continue;
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}
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$response['orderedItems'][] = $this->prepare_item_for_response( $inbox_item, $request );
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}
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$response = $this->prepare_collection_response( $response, $request );
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if ( \is_wp_error( $response ) ) {
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return $response;
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}
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/**
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* Filter the ActivityPub inbox array.
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*
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* @param array $response The ActivityPub inbox array.
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* @param \WP_REST_Request $request The request object.
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*/
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$response = \apply_filters( 'activitypub_rest_inbox_array', $response, $request );
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/**
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* Action triggered after the ActivityPub inbox has been created and sent to the client.
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*
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* @param \WP_REST_Request $request The request object.
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*/
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\do_action( 'activitypub_rest_inbox_post', $request );
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// Fire deprecated hook for backward compatibility.
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\do_action_deprecated(
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'activitypub_inbox_post',
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array( $request ),
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'8.1.0',
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'activitypub_rest_inbox_post'
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);
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$response = \rest_ensure_response( $response );
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$response->header( 'Content-Type', 'application/activity+json; charset=' . \get_option( 'blog_charset' ) );
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return $response;
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}
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/**
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* Prepares the item for the REST response.
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*
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* @param mixed $item WordPress representation of the item.
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* @param \WP_REST_Request $request Request object.
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* @return array Response object on success.
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*/
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public function prepare_item_for_response( $item, $request ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
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$activity = \json_decode( $item->post_content, true );
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return $activity;
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}
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/**
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* Handles user-inbox requests.
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*
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* @param \WP_REST_Request $request The request object.
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*
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* @return \WP_REST_Response|\WP_Error Response object or WP_Error.
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*/
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public function create_item( $request ) {
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$user_id = $request->get_param( 'user_id' );
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$data = $request->get_json_params();
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$type = camel_to_snake_case( $request->get_param( 'type' ) );
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/* @var Activity $activity Activity object.*/
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$activity = Activity::init_from_array( $data );
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// phpcs:ignore WordPress.Security.ValidatedSanitizedInput
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if ( Moderation::activity_is_blocked( $activity, $user_id ) ) {
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/**
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* ActivityPub inbox disallowed activity.
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*
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* @param array $data The data array.
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* @param int|null $user_id The user ID.
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* @param string $type The type of the activity.
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* @param Activity|\WP_Error $activity The Activity object.
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*/
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do_action( 'activitypub_rest_inbox_disallowed', $data, $user_id, $type, $activity );
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} else {
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/**
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* ActivityPub inbox action.
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*
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* @param array $data The data array.
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* @param int|null $user_id The user ID.
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* @param string $type The type of the activity.
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* @param Activity|\WP_Error $activity The Activity object.
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* @param string $context The context of the request.
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*/
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\do_action( 'activitypub_inbox', $data, $user_id, $type, $activity, Inbox::CONTEXT_INBOX );
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/**
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* ActivityPub inbox action for specific activity types.
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*
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* @param array $data The data array.
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* @param int|null $user_id The user ID.
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* @param Activity|\WP_Error $activity The Activity object.
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* @param string $context The context of the request.
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*/
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\do_action( 'activitypub_inbox_' . $type, $data, $user_id, $activity, Inbox::CONTEXT_INBOX );
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/**
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* Filter to skip inbox storage.
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*
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* Skip inbox storage for debugging purposes or to reduce load for
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* certain Activity-Types, like "Delete".
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*
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* @param bool $skip Whether to skip inbox storage.
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* @param array $data The activity data array.
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*
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* @return bool Whether to skip inbox storage.
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*/
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$skip = \apply_filters( 'activitypub_skip_inbox_storage', false, $data );
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if ( ! $skip ) {
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$activity_id = object_to_uri( $data );
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Inbox::add( $activity, (array) $user_id );
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\wp_clear_scheduled_hook( 'activitypub_inbox_create_item', array( $activity_id ) );
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\wp_schedule_single_event( time() + 15, 'activitypub_inbox_create_item', array( $activity_id ) );
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}
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}
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$response = \rest_ensure_response(
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array(
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'type' => 'https://w3id.org/fep/c180#approval-required',
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'title' => 'Approval Required',
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'status' => '202',
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'detail' => 'This activity requires approval before it can be processed.',
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)
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);
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$response->set_status( 202 );
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$response->header( 'Content-Type', 'application/activity+json; charset=' . \get_option( 'blog_charset' ) );
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return $response;
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}
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/**
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* Retrieves the schema for the inbox collection, conforming to JSON Schema.
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*
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* @return array Collection schema data.
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*/
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public function get_item_schema() {
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if ( $this->schema ) {
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return $this->add_additional_fields_schema( $this->schema );
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}
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$item_schema = array(
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'type' => 'object',
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);
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$schema = $this->get_collection_schema( $item_schema );
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// Add inbox-specific properties.
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$schema['title'] = 'inbox';
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$schema['properties']['generator'] = array(
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'description' => 'The software used to generate the collection.',
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'type' => 'string',
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'format' => 'uri',
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);
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$this->schema = $schema;
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return $this->add_additional_fields_schema( $this->schema );
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}
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/**
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* Process cached inbox activity.
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*
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* Retrieves all collected user IDs for an activity and processes them together.
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*
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* @param string $activity_id The activity ID.
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*/
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public static function process_create_item( $activity_id ) {
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// Deduplicate if multiple inbox items were created due to race condition.
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$inbox_item = Inbox::deduplicate( $activity_id );
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if ( ! $inbox_item ) {
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return;
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}
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$data = \json_decode( $inbox_item->post_content, true );
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// Reconstruct activity from inbox post.
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$activity = Activity::init_from_array( $data );
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// Sanitize again here: the type comes from stored activity JSON, which bypassed REST arg sanitization.
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$type = camel_to_snake_case( \sanitize_html_class( (string) $activity->get_type() ) );
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$context = Inbox::CONTEXT_INBOX;
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$user_ids = Inbox::get_recipients( $inbox_item->ID );
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/**
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* Fires after any ActivityPub Inbox activity has been handled, regardless of activity type.
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*
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* This hook is triggered for all activity types processed by the inbox handler.
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*
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* @param array $data The data array.
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* @param array $user_ids The user IDs.
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* @param string $type The type of the activity.
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* @param Activity $activity The Activity object.
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* @param int $result The ID of the inbox item that was created, or WP_Error if failed.
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* @param string $context The context of the request ('inbox' or 'shared_inbox').
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*/
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\do_action( 'activitypub_handled_inbox', $data, $user_ids, $type, $activity, $inbox_item->ID, $context );
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/**
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* Fires after an ActivityPub Inbox activity has been handled.
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*
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* @param array $data The data array.
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* @param array $user_ids The user IDs.
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* @param Activity $activity The Activity object.
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* @param int $result The ID of the inbox item that was created, or WP_Error if failed.
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* @param string $context The context of the request ('inbox' or 'shared_inbox').
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*/
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\do_action( 'activitypub_handled_inbox_' . $type, $data, $user_ids, $activity, $inbox_item->ID, $context );
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}
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}
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