/**
* Saves images order according to request.
*
* @param array $order new arrange of image ids, to be saved
*
* @return string
* @throws HttpException
*/
public function actionOrder($order)
{
if (count($order) == 0) {
throw new HttpException(400, 'No data, to save');
}
$res = $this->behavior->arrange($order);
return Json::encode($res);
}
