|null */ private static $active_plugins = null; /** * Ids of plugin-compat subscribers whose target plugin is active. * * @param bool $force Bypass memoization (testing). * * @return array */ public static function get_active_plugins( bool $force = false ): array { if ( ! $force && null !== self::$active_plugins ) { return self::$active_plugins; } self::$active_plugins = self::filter_active_registry( ( new SubscriberFactory() )->get_registry() ); return self::$active_plugins; } /** * Filters an id => class registry down to the ids whose class reports itself active. * * @param array $registry Id => FQCN map. * * @return array */ private static function filter_active_registry( array $registry ): array { $active = []; foreach ( $registry as $id => $class ) { if ( ! is_a( $class, PluginCompatibilityInterface::class, true ) ) { // Default-active until the class opts in to PluginCompatibilityInterface (Phase 1). $active[] = $id; continue; } if ( $class::is_activated() ) { $active[] = $id; } } return $active; } }