protected function addPriceRule()
    {
        $this->controlAccess('price_rule_add');

        if ($this->price_rule->add($this->getSubmitted())) {
            $this->redirect('admin/sale/price', $this->text('Price rule has been added'), 'success');
        }

        $this->redirect('', $this->text('Price rule has not been added'), 'warning');
    }