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_CatalogSearch
 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: class Mage_CatalogSearch_Model_Layer extends Mage_Catalog_Model_Layer
 28: {
 29:     const XML_PATH_DISPLAY_LAYER_COUNT = 'catalog/search/use_layered_navigation_count';
 30: 
 31:     /**
 32:      * Get current layer product collection
 33:      *
 34:      * @return Mage_Catalog_Model_Resource_Eav_Resource_Product_Collection
 35:      */
 36:     public function getProductCollection()
 37:     {
 38:         if (isset($this->_productCollections[$this->getCurrentCategory()->getId()])) {
 39:             $collection = $this->_productCollections[$this->getCurrentCategory()->getId()];
 40:         } else {
 41:             $collection = Mage::getResourceModel('catalogsearch/fulltext_collection');
 42:             $this->prepareProductCollection($collection);
 43:             $this->_productCollections[$this->getCurrentCategory()->getId()] = $collection;
 44:         }
 45:         return $collection;
 46:     }
 47: 
 48:     /**
 49:      * Prepare product collection
 50:      *
 51:      * @param Mage_Catalog_Model_Resource_Eav_Resource_Product_Collection $collection
 52:      * @return Mage_Catalog_Model_Layer
 53:      */
 54:     public function prepareProductCollection($collection)
 55:     {
 56:         $collection
 57:             ->addAttributeToSelect(Mage::getSingleton('catalog/config')->getProductAttributes())
 58:             ->addSearchFilter(Mage::helper('catalogsearch')->getQuery()->getQueryText())
 59:             ->setStore(Mage::app()->getStore())
 60:             ->addMinimalPrice()
 61:             ->addFinalPrice()
 62:             ->addTaxPercents()
 63:             ->addStoreFilter()
 64:             ->addUrlRewrite();
 65: 
 66:         Mage::getSingleton('catalog/product_status')->addVisibleFilterToCollection($collection);
 67:         Mage::getSingleton('catalog/product_visibility')->addVisibleInSearchFilterToCollection($collection);
 68: 
 69:         return $this;
 70:     }
 71: 
 72:     /**
 73:      * Get layer state key
 74:      *
 75:      * @return string
 76:      */
 77:     public function getStateKey()
 78:     {
 79:         if ($this->_stateKey === null) {
 80:             $this->_stateKey = 'Q_' . Mage::helper('catalogsearch')->getQuery()->getId()
 81:                 . '_'. parent::getStateKey();
 82:         }
 83:         return $this->_stateKey;
 84:     }
 85: 
 86:     /**
 87:      * Get default tags for current layer state
 88:      *
 89:      * @param   array $additionalTags
 90:      * @return  array
 91:      */
 92:     public function getStateTags(array $additionalTags = array())
 93:     {
 94:         $additionalTags = parent::getStateTags($additionalTags);
 95:         $additionalTags[] = Mage_CatalogSearch_Model_Query::CACHE_TAG;
 96:         return $additionalTags;
 97:     }
 98: 
 99:     /**
100:      * Add filters to attribute collection
101:      *
102:      * @param   Mage_Catalog_Model_Resource_Eav_Resource_Product_Attribute_Collection $collection
103:      * @return  Mage_Catalog_Model_Resource_Eav_Resource_Product_Attribute_Collection
104:      */
105:     protected function _prepareAttributeCollection($collection)
106:     {
107:         $collection->addIsFilterableInSearchFilter()
108:             ->addVisibleFilter();
109:         return $collection;
110:     }
111: 
112:     /**
113:      * Prepare attribute for use in layered navigation
114:      *
115:      * @param   Mage_Eav_Model_Entity_Attribute $attribute
116:      * @return  Mage_Eav_Model_Entity_Attribute
117:      */
118:     protected function _prepareAttribute($attribute)
119:     {
120:         $attribute = parent::_prepareAttribute($attribute);
121:         $attribute->setIsFilterable(Mage_Catalog_Model_Layer_Filter_Attribute::OPTIONS_ONLY_WITH_RESULTS);
122:         return $attribute;
123:     }
124: }
125: