/**
* Returns a total discount on the cart from the provided items
*
* @param Mage_Sales_Model_Quote_Item $item
* @param Mage_Sales_Model_Quote_Address $address
* @param TBT_Rewards_Model_Sales_Rule $rule
* @param int $qty max discount qty or unlimited if null
* @return float
*/
protected function _getTotalPercentDiscount($item, $address, $rule, $qty = null)
{
$all_items = $item->getQuote()->getAllItems();
$store = $item->getQuote()->getStore();
$qty = empty($qty) ? $item->getQty() : (int) $qty;
//@nelkaake -a 1/12/10: Confusing way how this returns in mid-method
if ($rule->getPointsAction() != TBT_Rewards_Model_Salesrule_Actions::ACTION_DISCOUNT_BY_POINTS_SPENT) {
$discountPercent = $rule->getDiscountAmount() / 100;
$totalDiscountOnCart = 0;
foreach ($all_items as $cartItem) {
if (!$rule->getActions()->validate($cartItem)) {
continue;
}
$discountOnItem = $cartItem->getRowTotal() / $item->getQty() * $qty * $discountPercent;
$totalDiscountOnCart += $discountOnItem;
}
return $totalDiscountOnCart;
}
// else, this is a by points spent rule:
$points_spent = Mage::getSingleton('rewards/session')->getPointsSpending();
$discountPercent = $rule->getDiscountAmount() * floor($points_spent / $rule->getPointsAmount()) / 100;
$discountPercent = min($discountPercent, 1);
$totalDiscountOnCart = 0;
$totalAmountToDiscount = 0;
foreach ($all_items as $cartItem) {
if (!$rule->getActions()->validate($cartItem)) {
continue;
}
if (Mage::helper('tax')->discountTax($store) && !Mage::helper('tax')->applyTaxAfterDiscount($store)) {
$totalAmountToDiscount += $cartItem->getRowTotalInclTax();
// $cartItem->getTaxAmount();
} else {
$totalAmountToDiscount += $cartItem->getRowTotal();
// $cartItem->getTaxAmount();
}
//$cartItem->printPre();
}
// @nelkaake -a 16/11/10:
if ($rule->getApplyToShipping()) {
$totalAmountToDiscount += $address->getShippingAmount();
}
$totalDiscountOnCart = $totalAmountToDiscount * $discountPercent;
return $totalDiscountOnCart;
}
