/**
* Check the line items and totals according to PayPal business logic limitations
*/
protected function _validate()
{
if (!Mage::helper('imagecc')->isActive()) {
return parent::_validate();
}
$this->_areItemsValid = false;
$this->_areTotalsValid = false;
// $referenceAmount = $this->_salesEntity->getBaseGrandTotal();
$referenceAmount = $this->_salesEntity->getGrandTotal();
$itemsSubtotal = 0;
foreach ($this->_items as $i) {
$itemsSubtotal = $itemsSubtotal + $i['qty'] * $i['amount'];
}
$sum = $itemsSubtotal + $this->_totals[self::TOTAL_TAX];
if (!$this->_isShippingAsItem) {
$sum += $this->_totals[self::TOTAL_SHIPPING];
}
if (!$this->_isDiscountAsItem) {
$sum -= $this->_totals[self::TOTAL_DISCOUNT];
}
/**
* numbers are intentionally converted to strings because of possible comparison error
* see http://php.net/float
*/
// match sum of all the items and totals to the reference amount
if (sprintf('%.4F', $sum) == sprintf('%.4F', $referenceAmount)) {
$this->_areItemsValid = true;
}
// PayPal requires to have discount less than items subtotal
if (!$this->_isDiscountAsItem) {
$this->_areTotalsValid = round($this->_totals[self::TOTAL_DISCOUNT], 4) < round($itemsSubtotal, 4);
} else {
$this->_areTotalsValid = $itemsSubtotal > 1.0E-5;
}
$this->_areItemsValid = $this->_areItemsValid && $this->_areTotalsValid;
}
