/**
* Filter collection by removing not available product types
*
* @param Mage_Core_Model_Resource_Db_Collection_Abstract $collection
* @return Mage_Core_Model_Resource_Db_Collection_Abstract
*/
public function applySalableProductTypesFilter($collection)
{
$productTypes = Mage::getConfig()->getNode('adminhtml/sales/order/create/available_product_types')->asArray();
$productTypes = array_keys($productTypes);
foreach ($collection->getItems() as $key => $item) {
if ($item instanceof Mage_Catalog_Model_Product) {
$type = $item->getTypeId();
} else {
if ($item instanceof Mage_Sales_Model_Order_Item) {
$type = $item->getProductType();
} else {
if ($item instanceof Mage_Sales_Model_Quote_Item) {
$type = $item->getProductType();
} else {
$type = '';
}
}
}
if (!in_array($type, $productTypes)) {
$collection->removeItemByKey($key);
}
}
return $collection;
}
