/**
* @param Mage_Catalog_Model_Resource_Product_Collection $collection
* @param string $currDir
*
* @return $this
*/
public function apply($collection, $currDir)
{
if (!$this->isEnabled()) {
return $this;
}
$sorters = $this->getSorters();
if (Mage::getStoreConfig('amsorting/general/use_index')) {
foreach ($sorters as $sorter) {
$collection->joinField($sorter->getCode(), $sorter->getIndexTable(), $sorter->getCode(), 'id=entity_id', array('store_id' => Mage::app()->getStore()->getId()), 'left');
}
} else {
$select = $collection->getSelect();
$col = $select->getPart('columns');
foreach ($sorters as $sorter) {
$col[] = array('', $sorter->getColumnSelect(), $sorter->getCode());
}
$select->setPart('columns', $col);
}
$collection->getSelect()->order(new Zend_Db_Expr('(' . $sorters['dividend']->getCode() . '/' . $sorters['divider']->getCode() . ') ' . $currDir));
return $this;
}
