1: <?php
 2: /**
 3:  * Magento
 4:  *
 5:  * NOTICE OF LICENSE
 6:  *
 7:  * This source file is subject to the Open Software License (OSL 3.0)
 8:  * that is bundled with this package in the file LICENSE.txt.
 9:  * It is also available through the world-wide-web at this URL:
10:  * http://opensource.org/licenses/osl-3.0.php
11:  * If you did not receive a copy of the license and are unable to
12:  * obtain it through the world-wide-web, please send an email
13:  * to license@magentocommerce.com so we can send you a copy immediately.
14:  *
15:  * DISCLAIMER
16:  *
17:  * Do not edit or add to this file if you wish to upgrade Magento to newer
18:  * versions in the future. If you wish to customize Magento for your
19:  * needs please refer to http://www.magentocommerce.com for more information.
20:  *
21:  * @category    Mage
22:  * @package     Mage_Review
23:  * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
24:  * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
25:  */
26: 
27: 
28: /**
29:  * Review Observer Model
30:  *
31:  * @category   Mage
32:  * @package    Mage_Review
33:  * @author     Magento Core Team <core@magentocommerce.com>
34:  */
35: class Mage_Review_Model_Observer
36: {
37:     /**
38:      * Add review summary info for tagged product collection
39:      *
40:      * @param Varien_Event_Observer $observer
41:      * @return Mage_Review_Model_Observer
42:      */
43:     public function tagProductCollectionLoadAfter(Varien_Event_Observer $observer)
44:     {
45:         $collection = $observer->getEvent()->getCollection();
46:         Mage::getSingleton('review/review')
47:             ->appendSummary($collection);
48: 
49:         return $this;
50:     }
51: 
52:     /**
53:      * Cleanup product reviews after product delete
54:      *
55:      * @param   Varien_Event_Observer $observer
56:      * @return  Mage_CatalogIndex_Model_Observer
57:      */
58:     public function processProductAfterDeleteEvent(Varien_Event_Observer $observer)
59:     {
60:         $eventProduct = $observer->getEvent()->getProduct();
61:         if ($eventProduct && $eventProduct->getId()) {
62:             Mage::getResourceSingleton('review/review')->deleteReviewsByProductId($eventProduct->getId());
63:         }
64: 
65:         return $this;
66:     }
67: 
68:     /**
69:      * Append review summary before rendering html
70:      *
71:      * @param Varien_Event_Observer $observer
72:      * @return Mage_Review_Model_Observer
73:      */
74:     public function catalogBlockProductCollectionBeforeToHtml(Varien_Event_Observer $observer)
75:     {
76:         $productCollection = $observer->getEvent()->getCollection();
77:         if ($productCollection instanceof Varien_Data_Collection) {
78:             $productCollection->load();
79:             Mage::getModel('review/review')->appendSummary($productCollection);
80:         }
81: 
82:         return $this;
83:     }
84: }
85: