installed plugin Easy Digital Downloads version 3.1.0.3

wp-content/plugins/easy-digital-downloads/includes/admin/upgrades/v3/class-base.php

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+<?php
+/**
+ * 3.0 Data Migration - Base.
+ *
+ * @subpackage  Admin/Upgrades/v3
+ * @copyright   Copyright (c) 2018, Easy Digital Downloads, LLC
+ * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
+ * @since       3.0
+ */
+
+namespace EDD\Admin\Upgrades\v3;
+
+// Exit if accessed directly
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Base Class.
+ *
+ * @since 3.0
+ */
+class Base extends \EDD_Batch_Export {
+
+	/**
+	 * Orders.
+	 *
+	 * @since 3.0
+	 * @var   string
+	 */
+	const ORDERS = 'orders';
+
+	/**
+	 * Discounts.
+	 *
+	 * @since 3.0
+	 * @var   string
+	 */
+	const DISCOUNTS = 'discounts';
+
+	/**
+	 * Our export type. Used for export-type specific filters/actions.
+	 *
+	 * @since 3.0
+	 * @var   string
+	 */
+	public $export_type = '';
+
+	/**
+	 * Allows for a non-download batch processing to be run.
+	 *
+	 * @since 3.0
+	 * @var   bool
+	 */
+	public $is_void = true;
+
+	/**
+	 * Sets the number of items to pull on each step.
+	 *
+	 * @since 3.0
+	 * @var   int
+	 */
+	public $per_step = 50;
+
+	/**
+	 * Is the upgrade done?
+	 *
+	 * @since 3.0
+	 * @var   bool
+	 */
+	public $done;
+
+	/**
+	 * Message.
+	 *
+	 * @since 3.0
+	 * @var   string
+	 */
+	public $message;
+
+	/**
+	 * Completed message.
+	 *
+	 * @since 3.0
+	 * @var   string
+	 */
+	public $completed_message;
+
+	/**
+	 * Upgrade routine.
+	 *
+	 * @since 3.0
+	 * @var   string
+	 */
+	public $upgrade;
+
+	/**
+	 * Retrieve the data pertaining to the current step and migrate as necessary.
+	 *
+	 * @since 3.0
+	 *
+	 * @return bool True if data was migrated, false otherwise.
+	 */
+	public function get_data() {
+		return false;
+	}
+
+	/**
+	 * Process a step.
+	 *
+	 * @since 3.0
+	 *
+	 * @return bool
+	 */
+	public function process_step() {
+		if ( ! $this->can_export() ) {
+			wp_die(
+				esc_html__( 'You do not have permission to run this upgrade.', 'easy-digital-downloads' ),
+				esc_html__( 'Error', 'easy-digital-downloads' ),
+				array(
+					'response' => 403,
+				)
+			);
+		}
+
+		$had_data = $this->get_data();
+
+		if ( $had_data ) {
+			$this->done = false;
+			// Save the *next* step to do.
+			update_option( sprintf( 'edd_v3_migration_%s_step', sanitize_key( $this->upgrade ) ), $this->step + 1 );
+			return true;
+		} else {
+			$this->done    = true;
+			$this->message = $this->completed_message;
+			edd_set_upgrade_complete( $this->upgrade );
+			delete_option( sprintf( 'edd_v3_migration_%s_step', sanitize_key( $this->upgrade ) ) );
+			edd_v30_is_migration_complete();
+			return false;
+		}
+	}
+
+	/**
+	 * Set the headers.
+	 *
+	 * @since 3.0
+	 */
+	public function headers() {
+		edd_set_time_limit();
+	}
+
+	/**
+	 * Perform the migration.
+	 *
+	 * @since 3.0
+	 *
+	 * @return void
+	 */
+	public function export() {
+
+		// Set headers.
+		$this->headers();
+
+		edd_die();
+	}
+
+	/**
+	 * Return the global database interface.
+	 *
+	 * @since  3.0
+	 * @access protected
+	 * @static
+	 *
+	 * @return \wpdb|\stdClass
+	 */
+	protected static function get_db() {
+		return isset( $GLOBALS['wpdb'] )
+			? $GLOBALS['wpdb']
+			: new \stdClass();
+	}
+
+	/**
+	 * Set properties specific to the export.
+	 *
+	 * @since 3.0
+	 *
+	 * @param array $request Form data passed into the batch processor.
+	 */
+	public function set_properties( $request ) {
+	}
+
+	/**
+	 * Allow for pre-fetching of data for the remainder of the batch processor.
+	 *
+	 * @since 3.0
+	 */
+	public function pre_fetch() {
+	}
+}