/**
* Return the qty of newly paid invoice items for gift card.
* This method depends on giftcard_paid_invoice_items field in product options array.
* It also update the field with the newly paid invoice items
*
* @param Mage_Sales_Model_Order_Item $item giftcard order item
* @return int qty of newly paid invoice items
*/
protected function _getAndUpdatePaidInvoiceItems(Mage_Sales_Model_Order_Item $item)
{
$newlyPaidInvoiceItemQty = 0;
$options = $item->getProductOptions();
$paidInvoiceItems = isset($options['giftcard_paid_invoice_items']) ? $options['giftcard_paid_invoice_items'] : array();
// find invoice for this order item
$invoiceItemCollection = Mage::getResourceModel('sales/order_invoice_item_collection')->addFieldToFilter('order_item_id', $item->getId());
foreach ($invoiceItemCollection as $invoiceItem) {
$invoiceId = $invoiceItem->getParentId();
if (isset($this->_loadedInvoices[$invoiceId])) {
$invoice = $this->_loadedInvoices[$invoiceId];
} else {
$invoice = Mage::getModel('sales/order_invoice')->load($invoiceId);
$this->_loadedInvoices[$invoiceId] = $invoice;
}
// check, if this order item has been paid
if ($invoice->getState() == Mage_Sales_Model_Order_Invoice::STATE_PAID && !in_array($invoiceItem->getId(), $paidInvoiceItems)) {
$newlyPaidInvoiceItemQty += $invoiceItem->getQty();
$paidInvoiceItems[] = $invoiceItem->getId();
}
}
$options['giftcard_paid_invoice_items'] = $paidInvoiceItems;
$item->setProductOptions($options);
return $newlyPaidInvoiceItemQty;
}
