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<?php
class Jetpack_Sync_Module_Meta extends Jetpack_Sync_Module {
private $meta_types = array( 'post', 'comment' );
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.
*
* @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 ) {
global $wpdb;
if ( ! in_array( $object_type, $this->meta_types ) ) {
return array();
}
if ( ! isset( $config['meta_key'] ) || ! isset( $config['ids'] ) || ! is_array( $config['ids'] ) ) {
return array();
}
$meta_key = $config['meta_key'];
$ids = $config['ids'];
if ( ! $this->is_meta_key_allowed( $meta_key ) ) {
return array();
}
if ( 'post' == $object_type ) {
$table = $wpdb->postmeta;
$object_id_column = 'post_id';
} else {
$table = $wpdb->commentmeta;
$object_id_column = 'comment_id';
}
// Sanitize so that the array only has integer values
$ids_string = implode( ', ', array_map( 'intval', $ids ) );
$metas = $wpdb->get_results(
$wpdb->prepare(
"SELECT * FROM {$table} WHERE {$object_id_column} IN ( {$ids_string} ) AND meta_key = %s",
$meta_key
)
);
$meta_objects = array();
foreach( (array) $metas as $meta_object ) {
$meta_object = (array) $meta_object;
$meta_objects[ $meta_object[ $object_id_column ] ] = array(
'meta_type' => $object_type,
'meta_id' => $meta_object['meta_id'],
'meta_key' => $meta_key,
'meta_value' => $meta_object['meta_value'],
'object_id' => $meta_object[ $object_id_column ],
);
}
return $meta_objects;
}
public function init_listeners( $callable ) {
$whitelist_handler = array( $this, 'filter_meta' );
foreach ( $this->meta_types as $meta_type ) {
add_action( "added_{$meta_type}_meta", $callable, 10, 4 );
add_action( "updated_{$meta_type}_meta", $callable, 10, 4 );
add_action( "deleted_{$meta_type}_meta", $callable, 10, 4 );
add_filter( "jetpack_sync_before_enqueue_added_{$meta_type}_meta", $whitelist_handler );
add_filter( "jetpack_sync_before_enqueue_updated_{$meta_type}_meta", $whitelist_handler );
add_filter( "jetpack_sync_before_enqueue_deleted_{$meta_type}_meta", $whitelist_handler );
}
}
/**
* Should we allow the meta key to be synced?
*
* @param string $meta_key The meta key.
*
* @return bool
*/
function is_meta_key_allowed( $meta_key ) {
if ( '_' === $meta_key[0] &&
! in_array( $meta_key, Jetpack_Sync_Defaults::$default_whitelist_meta_keys ) &&
! wp_startswith( $meta_key, '_wpas_skip_' )
) {
return false;
}
if ( in_array( $meta_key, Jetpack_Sync_Settings::get_setting( 'meta_blacklist' ) ) ) {
return false;
}
return true;
}
function filter_meta( $args ) {
if ( ! $this->is_meta_key_allowed( $args[2] ) ) {
return false;
}
return $args;
}
}
|
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