/**
* Apply attribute option filter to product collection
*
* @param Zend_Controller_Request_Abstract $request
* @param Varien_Object $filterBlock
*
* @return Mage_Catalog_Model_Layer_Filter_Attribute
*/
public function apply(Zend_Controller_Request_Abstract $request, $filterBlock)
{
$this->_getItemsData();
$_attributeCode = $filterBlock->getAttributeModel()->getAttributeCode();
if (isset($this->_selectedFilterItems[$_attributeCode]) && is_array($this->_selectedFilterItems[$_attributeCode])) {
foreach ($this->_selectedFilterItems[$_attributeCode] as $optionData) {
$this->getLayer()->getState()->addFilter($this->_createItem($optionData));
}
}
return $this;
}
