/**
* Update cart on update-items action
*
* @param $observer
* @return $this
*/
public function updateGiftCart($observer)
{
if ($this->_helper->productGiftEnabled() && $this->_helper->productGiftStrategy()) {
$cart = $observer->getEvent()->getCart();
$cart_info = $observer->getEvent()->getInfo();
$prev_item = null;
foreach ($cart_info as $itemId => $itemInfo) {
$item = $cart->getQuote()->getItemById($itemId);
$qty = isset($itemInfo['qty']) ? (double) $itemInfo['qty'] : false;
$gift_attr = $item->getOptionByCode('gift_for_product_id');
if ($gift_attr && $gift_attr->getValue() && $prev_item->getOrigData('qty') != $prev_item->getQty()) {
try {
$item->setQty($prev_item->getQty());
} catch (Exception $e) {
Mage::getSingleton('core/session')->addError('You can\'t change gift quantity: ' . $e->getMessage());
}
}
$prev_item = $item;
}
}
return $this;
}
