/**
* Add join for catalog in stock field to product collection
*
* @param Mage_Catalog_Model_Resource_Product_Collection $productCollection
* @return Mage_CatalogInventory_Model_Resource_Stock_Item
*/
public function addCatalogInventoryToProductCollection($productCollection)
{
$adapter = $this->_getReadAdapter();
$isManageStock = (int) Mage::getStoreConfig(Mage_CatalogInventory_Model_Stock_Item::XML_PATH_MANAGE_STOCK);
$stockExpr = $adapter->getCheckSql('cisi.use_config_manage_stock = 1', $isManageStock, 'cisi.manage_stock');
$stockExpr = $adapter->getCheckSql("({$stockExpr} = 1)", 'cisi.is_in_stock', '1');
$productCollection->joinTable(array('cisi' => 'cataloginventory/stock_item'), 'product_id=entity_id', array('is_saleable' => new Zend_Db_Expr($stockExpr), 'inventory_in_stock' => 'is_in_stock'), null, 'left');
return $this;
}
/**
* Add low stock filter to product collection
*
* @param Mage_Catalog_Model_Resource_Product_Collection $collection
* @param array $fields
* @return Mage_CatalogInventory_Model_Resource_Stock
*/
public function addLowStockFilter(Mage_Catalog_Model_Resource_Product_Collection $collection, $fields)
{
$this->_initConfig();
$adapter = $collection->getSelect()->getAdapter();
$qtyIf = $adapter->getCheckSql('invtr.use_config_notify_stock_qty', $this->_configNotifyStockQty, 'invtr.notify_stock_qty');
$conditions = array(array($adapter->prepareSqlCondition('invtr.use_config_manage_stock', 1), $adapter->prepareSqlCondition($this->_isConfigManageStock, 1), $adapter->prepareSqlCondition('invtr.qty', array('lt' => $qtyIf))), array($adapter->prepareSqlCondition('invtr.use_config_manage_stock', 0), $adapter->prepareSqlCondition('invtr.manage_stock', 1)));
$where = array();
foreach ($conditions as $k => $part) {
$where[$k] = join(' ' . Zend_Db_Select::SQL_AND . ' ', $part);
}
$where = $adapter->prepareSqlCondition('invtr.low_stock_date', array('notnull' => true)) . ' ' . Zend_Db_Select::SQL_AND . ' ((' . join(') ' . Zend_Db_Select::SQL_OR . ' (', $where) . '))';
$collection->joinTable(array('invtr' => 'cataloginventory/stock_item'), 'product_id = entity_id', $fields, $where);
return $this;
}
