public function rebuildProductIndex(Varien_Object $event)
 {
     $storeId = $event->getStoreId();
     $productIds = $event->getProductIds();
     $page = $event->getPage();
     $pageSize = $event->getPageSize();
     if (is_null($storeId) && !empty($productIds)) {
         foreach (Mage::app()->getStores() as $storeId => $store) {
             if (!$store->getIsActive()) {
                 continue;
             }
             $this->helper->rebuildStoreProductIndex($storeId, $productIds);
         }
     } else {
         if (!empty($page) && !empty($pageSize)) {
             $this->helper->rebuildStoreProductIndexPage($storeId, $this->product_helper->getProductCollectionQuery($storeId, $productIds), $page, $pageSize);
         } else {
             $this->helper->rebuildStoreProductIndex($storeId, $productIds);
         }
     }
     return $this;
 }