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<?php
/**
* Meta sync module.
*
* @package automattic/jetpack-sync
*/
namespace Automattic\Jetpack\Sync\Modules;
/**
* Class to handle sync for meta.
*/
class Meta extends Module {
/**
* Sync module name.
*
* @access public
*
* @return string
*/
public function name() {
return 'meta';
}
/**
* This implementation of get_objects_by_id() is a bit hacky since we're not passing in an array of meta IDs,
* but instead an array of post or comment IDs for which to retrieve meta for. On top of that,
* we also pass in an associative array where we expect there to be 'meta_key' and 'ids' keys present.
*
* This seemed to be required since if we have missing meta on WP.com and need to fetch it, we don't know what
* the meta key is, but we do know that we have missing meta for a given post or comment.
*
* @todo Refactor the $wpdb->prepare call to use placeholders.
*
* @param string $object_type The type of object for which we retrieve meta. Either 'post' or 'comment'.
* @param array $config Must include 'meta_key' and 'ids' keys.
*
* @return array
*/
public function get_objects_by_id( $object_type, $config ) {
$table = _get_meta_table( $object_type );
if ( ! $table ) {
return array();
}
if ( ! is_array( $config ) ) {
return array();
}
$meta_objects = array();
foreach ( $config as $item ) {
$meta = null;
if ( isset( $item['id'] ) && isset( $item['meta_key'] ) ) {
$meta = $this->get_object_by_id( $object_type, (int) $item['id'], (string) $item['meta_key'] );
}
$meta_objects[ $item['id'] . '-' . $item['meta_key'] ] = $meta;
}
return $meta_objects;
}
/**
* Get a single Meta Result.
*
* @param string $object_type post, comment, term, user.
* @param null $id Object ID.
* @param null $meta_key Meta Key.
*
* @return mixed|null
*/
public function get_object_by_id( $object_type, $id = null, $meta_key = null ) {
global $wpdb;
if ( ! is_int( $id ) || ! is_string( $meta_key ) ) {
return null;
}
$table = _get_meta_table( $object_type );
$object_id_column = $object_type . '_id';
// Sanitize so that the array only has integer values.
$meta = $wpdb->get_results(
$wpdb->prepare(
// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
"SELECT * FROM {$table} WHERE {$object_id_column} = %d AND meta_key = %s",
$id,
$meta_key
),
ARRAY_A
);
$meta_objects = null;
if ( ! is_wp_error( $meta ) && ! empty( $meta ) ) {
foreach ( $meta as $meta_entry ) {
if ( 'post' === $object_type && strlen( $meta_entry['meta_value'] ) >= Posts::MAX_POST_META_LENGTH ) {
$meta_entry['meta_value'] = '';
}
$meta_objects[] = array(
'meta_type' => $object_type,
'meta_id' => $meta_entry['meta_id'],
'meta_key' => $meta_key,
'meta_value' => $meta_entry['meta_value'],
'object_id' => $meta_entry[ $object_id_column ],
);
}
}
return $meta_objects;
}
}