/**
* Returns the total accumulated catalog discounts on an item
* @param Mage_Sales_Model_Quote_Item|Mage_Sales_Model_Order_Item $item
* @return int negative discount amount
*/
protected function _getTotalItemCatalogDiscount($item)
{
if (!$item->getQuoteId() || !$item->getId()) {
return 0;
}
$row_total_before_disc = $item->getRowTotalBeforeRedemptions();
$row_total = $item->getRowTotal();
if ($item->getRewardsCatalogDiscount()) {
$total_discount = $item->getRewardsCatalogDiscount();
} else {
if (empty($row_total_before_disc)) {
$item->setRowTotal($item->getRowTotalBeforeRedemptions());
$item->setRowTotalInclTax($item->getRowTotalBeforeRedemptionsInclTax());
$total_discount = $this->_getRedeemer()->getTotalCatalogDiscount($item);
} else {
$total_discount = $item->getRowTotalBeforeRedemptions() - $item->getRowTotal();
}
}
return $total_discount;
}
