public function cmdDeleteCart()
    {
        $id = $this->getParam(0);

        $options = null;

        if ($this->getParam('user')) {
            $options = array('user_id' => $id);
        } else if ($this->getParam('sku')) {
            $options = array('sku' => $id);
        } else if ($this->getParam('order')) {

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

            $options = array('order_id' => $id);
        }

        if (isset($options)) {

            $deleted = $count = 0;
            foreach ($this->cart->getList($options) as $item) {
                $count++;
                $deleted += (int) $this->cart->delete($item['cart_id']);
            }

            $result = $count && $count == $deleted;

        } else {

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

            $result = $this->cart->delete($id);
        }

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

        $this->output();
    }