/**
* Move item to given wishlist.
* Check whether item belongs to one of customer's wishlists
*
* @param Mage_Wishlist_Model_Item $item
* @param Mage_Wishlist_Model_Wishlist $wishlist
* @param Mage_Wishlist_Model_Resource_Wishlist_Collection $customerWishlists
* @param int $qty
* @throws InvalidArgumentException|DomainException
*/
protected function _moveItem(Mage_Wishlist_Model_Item $item, Mage_Wishlist_Model_Wishlist $wishlist, Mage_Wishlist_Model_Resource_Wishlist_Collection $customerWishlists, $qty = null)
{
if (!$item->getId()) {
throw new InvalidArgumentException();
}
if ($item->getWishlistId() == $wishlist->getId()) {
throw new DomainException(null, 1);
}
if (!$customerWishlists->getItemById($item->getWishlistId())) {
throw new DomainException(null, 2);
}
$buyRequest = $item->getBuyRequest();
if ($qty) {
$buyRequest->setQty($qty);
}
$wishlist->addNewItem($item->getProduct(), $buyRequest);
$qtyDiff = $item->getQty() - $qty;
if ($qty && $qtyDiff > 0) {
$item->setQty($qtyDiff);
$item->save();
} else {
$item->delete();
}
}