protected function getListCart()
    {
        $id = $this->getParam(0);

        if (!isset($id)) {
            return $this->cart->getList(array('limit' => $this->getLimit()));
        }

        if ($this->getParam('user')) {
            return $this->cart->getList(array('user_id' => $id, 'limit' => $this->getLimit()));
        }

        if ($this->getParam('sku')) {
            return $this->cart->getList(array('sku' => $id, 'limit' => $this->getLimit()));
        }

        if (!is_numeric($id)) {
            $this->errorAndExit($this->text('Invalid argument'));
        }

        if ($this->getParam('order')) {
            return $this->cart->getList(array('order_id' => $id, 'limit' => $this->getLimit()));
        }

        if ($this->getParam('store')) {
            return $this->cart->getList(array('store_id' => $id, 'limit' => $this->getLimit()));
        }

        $result = $this->cart->get($id);

        if (empty($result)) {
            $this->errorAndExit($this->text('Unexpected result'));
        }

        return array($result);
    }