Coupons::_saveCoupon PHP Method

    private function _saveCoupon()
    {
        if ($this->validateForm() === TRUE) {
            $save_type = !is_numeric($this->input->get('id')) ? $this->lang->line('text_added') : $this->lang->line('text_updated');
            if ($coupon_id = $this->Coupons_model->saveCoupon($this->input->get('id'), $this->input->post())) {
                log_activity($this->user->getStaffId(), $save_type, 'coupons', get_activity_message('activity_custom', array('{staff}', '{action}', '{context}', '{link}', '{item}'), array($this->user->getStaffName(), $save_type, 'coupon', site_url('coupons/edit?id=' . $coupon_id), $this->input->post('name'))));
                $this->alert->set('success', sprintf($this->lang->line('alert_success'), 'Coupon ' . $save_type));
            } else {
                $this->alert->set('warning', sprintf($this->lang->line('alert_error_nothing'), $save_type));
            }
            return $coupon_id;
        }
    }