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_Catalog
 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:  * Catalog attribute resource model
 30:  *
 31:  * @category    Mage
 32:  * @package     Mage_Catalog
 33:  * @author      Magento Core Team <core@magentocommerce.com>
 34:  */
 35: class Mage_Catalog_Model_Resource_Attribute extends Mage_Eav_Model_Resource_Entity_Attribute
 36: {
 37:     /**
 38:      * Perform actions before object save
 39:      *
 40:      * @param Mage_Core_Model_Abstract $object
 41:      * @return Mage_Catalog_Model_Resource_Attribute
 42:      */
 43:     protected function _beforeSave(Mage_Core_Model_Abstract $object)
 44:     {
 45:         $applyTo = $object->getApplyTo();
 46:         if (is_array($applyTo)) {
 47:             $object->setApplyTo(implode(',', $applyTo));
 48:         }
 49:         return parent::_beforeSave($object);
 50:     }
 51: 
 52:     /**
 53:      * Perform actions after object save
 54:      *
 55:      * @param  Mage_Core_Model_Abstract $object
 56:      * @return Mage_Catalog_Model_Resource_Attribute
 57:      */
 58:     protected function _afterSave(Mage_Core_Model_Abstract $object)
 59:     {
 60:         $this->_clearUselessAttributeValues($object);
 61:         return parent::_afterSave($object);
 62:     }
 63: 
 64:     /**
 65:      * Clear useless attribute values
 66:      *
 67:      * @param  Mage_Core_Model_Abstract $object
 68:      * @return Mage_Catalog_Model_Resource_Attribute
 69:      */
 70:     protected function _clearUselessAttributeValues(Mage_Core_Model_Abstract $object)
 71:     {
 72:         $origData = $object->getOrigData();
 73: 
 74:         if ($object->isScopeGlobal()
 75:             && isset($origData['is_global'])
 76:             && Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL != $origData['is_global']
 77:         ) {
 78:             $attributeStoreIds = array_keys(Mage::app()->getStores());
 79:             if (!empty($attributeStoreIds)) {
 80:                 $delCondition = array(
 81:                     'entity_type_id=?' => $object->getEntityTypeId(),
 82:                     'attribute_id = ?' => $object->getId(),
 83:                     'store_id IN(?)'   => $attributeStoreIds
 84:                 );
 85:                 $this->_getWriteAdapter()->delete($object->getBackendTable(), $delCondition);
 86:             }
 87:         }
 88: 
 89:         return $this;
 90:     }
 91: 
 92:     /**
 93:      * Delete entity
 94:      *
 95:      * @param Mage_Core_Model_Abstract $object
 96:      * @return Mage_Catalog_Model_Resource_Attribute
 97:      */
 98:     public function deleteEntity(Mage_Core_Model_Abstract $object)
 99:     {
100:         if (!$object->getEntityAttributeId()) {
101:             return $this;
102:         }
103: 
104:         $select = $this->_getReadAdapter()->select()
105:             ->from($this->getTable('eav/entity_attribute'))
106:             ->where('entity_attribute_id = ?', (int)$object->getEntityAttributeId());
107:         $result = $this->_getReadAdapter()->fetchRow($select);
108: 
109:         if ($result) {
110:             $attribute = Mage::getSingleton('eav/config')
111:                 ->getAttribute(Mage_Catalog_Model_Product::ENTITY, $result['attribute_id']);
112: 
113:             if ($this->isUsedBySuperProducts($attribute, $result['attribute_set_id'])) {
114:                 Mage::throwException(Mage::helper('eav')->__("Attribute '%s' used in configurable products", $attribute->getAttributeCode()));
115:             }
116:             $backendTable = $attribute->getBackend()->getTable();
117:             if ($backendTable) {
118:                 $select = $this->_getWriteAdapter()->select()
119:                     ->from($attribute->getEntity()->getEntityTable(), 'entity_id')
120:                     ->where('attribute_set_id = ?', $result['attribute_set_id']);
121: 
122:                 $clearCondition = array(
123:                     'entity_type_id =?' => $attribute->getEntityTypeId(),
124:                     'attribute_id =?'   => $attribute->getId(),
125:                     'entity_id IN (?)'  => $select
126:                 );
127:                 $this->_getWriteAdapter()->delete($backendTable, $clearCondition);
128:             }
129:         }
130: 
131:         $condition = array('entity_attribute_id = ?' => $object->getEntityAttributeId());
132:         $this->_getWriteAdapter()->delete($this->getTable('entity_attribute'), $condition);
133: 
134:         return $this;
135:     }
136: 
137:     /**
138:      * Defines is Attribute used by super products
139:      *
140:      * @param Mage_Core_Model_Abstract $object
141:      * @param int $attributeSet
142:      * @return int
143:      */
144:     public function isUsedBySuperProducts(Mage_Core_Model_Abstract $object, $attributeSet = null)
145:     {
146:         $adapter      = $this->_getReadAdapter();
147:         $attrTable    = $this->getTable('catalog/product_super_attribute');
148:         $productTable = $this->getTable('catalog/product');
149: 
150:         $bind = array('attribute_id' => $object->getAttributeId());
151:         $select = clone $adapter->select();
152:         $select->reset()
153:             ->from(array('main_table' => $attrTable), array('psa_count' => 'COUNT(product_super_attribute_id)'))
154:             ->join(array('entity' => $productTable), 'main_table.product_id = entity.entity_id')
155:             ->where('main_table.attribute_id = :attribute_id')
156:             ->group('main_table.attribute_id')
157:             ->limit(1);
158: 
159:         if ($attributeSet !== null) {
160:             $bind['attribute_set_id'] = $attributeSet;
161:             $select->where('entity.attribute_set_id = :attribute_set_id');
162:         }
163: 
164:         $helper = Mage::getResourceHelper('core');
165:         $query  = $helper->getQueryUsingAnalyticFunction($select);
166:         return $adapter->fetchOne($query, $bind);
167:     }
168: }
169: