public function actionListMedia()
    {
        $result = array();

        if (isset($_GET['content_id']) && isset($_GET['content_type'])) {
            //get for modal
            $media = Media::find()
                ->leftJoin('kato_content_media', 'kato_content_media.media_id = kato_media.id')
                ->where(['kato_content_media.content_id' => $_GET['content_id'], 'kato_content_media.content_type' => $_GET['content_type']])
                ->all();
        } else {
            //return all media
            $media = Media::find()->all();
        }

        if ($media) {
            foreach ($media as $data) {
                $result[] = array(
                    'thumb' => '/' . $data->source,
                    'image' => '/' . $data->source,
                    'title' => '/' . $data->filename,
                    //'filelink' => '/' . $data->source,
                );
            }
        }

        echo Json::encode($result);
    }