/**
  * Add a gift card to the container. Will make the gift card balance check
  * and make sure card can be applied to the order.
  * @param EbayEnterprise_GiftCard_Model_IGiftcard $card
  * @return self
  */
 public function addGiftCardToOrder(EbayEnterprise_GiftCard_Model_IGiftcard $card)
 {
     try {
         $card->checkBalance();
         // only add cards with an available balance
         if ($card->getBalanceAmount() > 0) {
             $this->_giftCardContainer->updateGiftCard($card);
         } else {
             // throw exception to trigger error handling below, let 0 balance card
             // get handled like any other balance check failure
             throw Mage::exception('EbayEnterprise_GiftCard', $this->__(self::ZERO_BALANCE_CARD_MESSAGE, $card->getCardNumber()));
         }
     } catch (EbayEnterprise_GiftCard_Exception $e) {
         Mage::getSingleton('checkout/session')->addError($this->__($e->getMessage()));
     }
     return $this;
 }
 /**
  * Add a gift card to the container. Will make the gift card balance check
  * and make sure card can be applied to the order.
  * @param EbayEnterprise_GiftCard_Model_IGiftcard $card
  * @return self
  * @throws EbayEnterprise_GiftCard_Exception If gift card could not be added to the order.
  */
 public function addGiftCardToOrder(EbayEnterprise_GiftCard_Model_IGiftcard $card, EbayEnterprise_GiftCard_Model_IContainer $giftCardContainer)
 {
     $card->checkBalance();
     // Treat 0 balance gift cards as invalid.
     if ($card->getBalanceAmount() <= 0) {
         throw Mage::exception('EbayEnterprise_GiftCard', $this->__(self::ZERO_BALANCE_CARD_MESSAGE, $card->getCardNumber()));
     }
     $giftCardContainer->updateGiftCard($card);
     return $this;
 }