/**
  * later index/overview?
  */
 public function admin_test()
 {
     if (!empty($this->request->data['DiscountCode'])) {
         # redeem
         if ($res = $this->Discount->redeem($this->request->data['DiscountCode']['code'])) {
             $this->Common->flashMessage(__('Done'), 'success');
         } elseif ($res === null) {
             $this->Common->flashMessage(__('Already redeemed'), 'warning');
         } else {
             $this->Common->flashMessage(__('Error'), 'error');
         }
         $this->redirect(array('action' => 'test'));
     } elseif (!empty($this->request->data['Discount'])) {
         $value = $this->request->data['Discount']['amount'];
         # check
         if ($check = $this->Discount->check($this->request->data['Discount']['code'], $value)) {
             $new = Discount::calculate($value, $check['Discount']);
             $this->Common->flashMessage(__('Wert von ' . $value . ' auf ' . $new . ' gesenkt'), 'success');
         } else {
             $this->Common->flashMessage(__('Error'), 'error');
         }
     }
     if (empty($this->request->data)) {
         $this->request->data['Discount']['amount'] = 10;
     }
 }