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<?php /** * This file holds the abstract class for dealing with imports from other plugins. * * @package WPSEO\Admin\Import\Plugins */ /** * Class WPSEO_Plugin_Importer. * * Class with functionality to import meta data from other plugins. */ abstract class WPSEO_Plugin_Importer { /** * Holds the import status object. * * @var WPSEO_Import_Status */ protected $status; /** * The plugin name. * * @var string */ protected $plugin_name; /** * Meta key, used in SQL LIKE clause for delete query. * * @var string */ protected $meta_key; /** * Array of meta keys to detect and import. * * @var array */ protected $clone_keys; /** * Class constructor. */ public function __construct() {} /** * Returns the string for the plugin we're importing from. * * @return string Plugin name. */ public function get_plugin_name() { return $this->plugin_name; } /** * Imports the settings and post meta data from another SEO plugin. * * @return WPSEO_Import_Status Import status object. */ public function run_import() { $this->status = new WPSEO_Import_Status( 'import', false ); if ( ! $this->detect() ) { return $this->status; } $this->status->set_status( $this->import() ); // Flush the entire cache, as we no longer know what's valid and what's not. wp_cache_flush(); return $this->status; } /** * Handles post meta data to import. * * @return bool Import success status. */ protected function import() { return $this->meta_keys_clone( $this->clone_keys ); } /** * Removes the plugin data from the database. * * @return WPSEO_Import_Status Import status object. */ public function run_cleanup() { $this->status = new WPSEO_Import_Status( 'cleanup', false ); if ( ! $this->detect() ) { return $this->status; } return $this->status->set_status( $this->cleanup() ); } /** * Removes the plugin data from the database. * * @return bool Cleanup status. */ protected function cleanup() { global $wpdb; if ( empty( $this->meta_key ) ) { return true; } $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->postmeta} WHERE meta_key LIKE %s", $this->meta_key ) ); $result = $wpdb->__get( 'result' ); if ( ! $result ) { $this->cleanup_error_msg(); } return $result; } /** * Sets the status message for when a cleanup has gone bad. * * @return void */ protected function cleanup_error_msg() { /* translators: %s is replaced with the plugin's name. */ $this->status->set_msg( sprintf( __( 'Cleanup of %s data failed.', 'wordpress-seo' ), $this->plugin_name ) ); } /** * Detects whether an import for this plugin is needed. * * @return WPSEO_Import_Status Import status object. */ public function run_detect() { $this->status = new WPSEO_Import_Status( 'detect', false ); if ( ! $this->detect() ) { return $this->status; } return $this->status->set_status( true ); } /** * Detects whether there is post meta data to import. * * @return bool Boolean indicating whether there is something to import. */ protected function detect() { global $wpdb; $meta_keys = wp_list_pluck( $this->clone_keys, 'old_key' ); $result = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) AS `count` FROM {$wpdb->postmeta} WHERE meta_key IN ( " . implode( ', ', array_fill( 0, count( $meta_keys ), '%s' ) ) . ' )', $meta_keys ) ); if ( $result === '0' ) { return false; } return true; } /** * Helper function to clone meta keys and (optionally) change their values in bulk. * * @param string $old_key The existing meta key. * @param string $new_key The new meta key. * @param array $replace_values An array, keys old value, values new values. * * @return bool Clone status. */ protected function meta_key_clone( $old_key, $new_key, $replace_values = [] ) { global $wpdb; // First we create a temp table with all the values for meta_key. $result = $wpdb->query( $wpdb->prepare( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.SchemaChange -- This is intentional + temporary. "CREATE TEMPORARY TABLE tmp_meta_table SELECT * FROM {$wpdb->postmeta} WHERE meta_key = %s", $old_key ) ); if ( $result === false ) { $this->set_missing_db_rights_status(); return false; } // Delete all the values in our temp table for posts that already have data for $new_key. $wpdb->query( $wpdb->prepare( "DELETE FROM tmp_meta_table WHERE post_id IN ( SELECT post_id FROM {$wpdb->postmeta} WHERE meta_key = %s )", WPSEO_Meta::$meta_prefix . $new_key ) ); /* * We set meta_id to NULL so on re-insert into the postmeta table, MYSQL can set * new meta_id's and we don't get duplicates. */ $wpdb->query( 'UPDATE tmp_meta_table SET meta_id = NULL' ); // Now we rename the meta_key. $wpdb->query( $wpdb->prepare( 'UPDATE tmp_meta_table SET meta_key = %s', WPSEO_Meta::$meta_prefix . $new_key ) ); $this->meta_key_clone_replace( $replace_values ); // With everything done, we insert all our newly cloned lines into the postmeta table. $wpdb->query( "INSERT INTO {$wpdb->postmeta} SELECT * FROM tmp_meta_table" ); // Now we drop our temporary table. // phpcs:ignore WordPress.DB.DirectDatabaseQuery.SchemaChange -- This is intentional + a temporary table. $wpdb->query( 'DROP TEMPORARY TABLE IF EXISTS tmp_meta_table' ); return true; } /** * Clones multiple meta keys. * * @param array $clone_keys The keys to clone. * * @return bool Success status. */ protected function meta_keys_clone( $clone_keys ) { foreach ( $clone_keys as $clone_key ) { $result = $this->meta_key_clone( $clone_key['old_key'], $clone_key['new_key'], ( $clone_key['convert'] ?? [] ) ); if ( ! $result ) { return false; } } return true; } /** * Sets the import status to false and returns a message about why it failed. * * @return void */ protected function set_missing_db_rights_status() { $this->status->set_status( false ); /* translators: %s is replaced with Yoast SEO. */ $this->status->set_msg( sprintf( __( 'The %s importer functionality uses temporary database tables. It seems your WordPress install does not have the capability to do this, please consult your hosting provider.', 'wordpress-seo' ), 'Yoast SEO' ) ); } /** * Helper function to search for a key in an array and maybe save it as a meta field. * * @param string $plugin_key The key in the $data array to check. * @param string $yoast_key The identifier we use in our meta settings. * @param array $data The array of data for this post to sift through. * @param int $post_id The post ID. * * @return void */ protected function import_meta_helper( $plugin_key, $yoast_key, $data, $post_id ) { if ( ! empty( $data[ $plugin_key ] ) ) { $this->maybe_save_post_meta( $yoast_key, $data[ $plugin_key ], $post_id ); } } /** * Saves a post meta value if it doesn't already exist. * * @param string $new_key The key to save. * @param mixed $value The value to set the key to. * @param int $post_id The Post to save the meta for. * * @return void */ protected function maybe_save_post_meta( $new_key, $value, $post_id ) { // Big. Fat. Sigh. Mostly used for _yst_is_cornerstone, but might be useful for other hidden meta's. $key = WPSEO_Meta::$meta_prefix . $new_key; $wpseo_meta = true; if ( substr( $new_key, 0, 1 ) === '_' ) { $key = $new_key; $wpseo_meta = false; } $existing_value = get_post_meta( $post_id, $key, true ); if ( empty( $existing_value ) ) { if ( $wpseo_meta ) { WPSEO_Meta::set_value( $new_key, $value, $post_id ); return; } update_post_meta( $post_id, $new_key, $value ); } } /** * Replaces values in our temporary table according to our settings. * * @param array $replace_values Key value pair of values to replace with other values. * * @return void */ protected function meta_key_clone_replace( $replace_values ) { global $wpdb; // Now we replace values if needed. if ( is_array( $replace_values ) && $replace_values !== [] ) { foreach ( $replace_values as $old_value => $new_value ) { $wpdb->query( $wpdb->prepare( 'UPDATE tmp_meta_table SET meta_value = %s WHERE meta_value = %s', $new_value, $old_value ) ); } } } }
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