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Block Source: Mage_Page_Block_Switch

<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magento.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magento.com for more information.
 *
 * @category    Mage
 * @package     Mage_Page
 * @copyright  Copyright (c) 2006-2015 X.commerce, Inc. (http://www.magento.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Store and language switcher block
 *
 * @category   Mage
 * @package    Mage_Core
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Page_Block_Switch extends Mage_Core_Block_Template
{
    protected 
$_storeInUrl;

    public function 
getCurrentWebsiteId()
    {
        return 
Mage::app()->getStore()->getWebsiteId();
    }

    public function 
getCurrentGroupId()
    {
        return 
Mage::app()->getStore()->getGroupId();
    }

    public function 
getCurrentStoreId()
    {
        return 
Mage::app()->getStore()->getId();
    }

    public function 
getRawGroups()
    {
        if (!
$this->hasData('raw_groups')) {
            
$websiteGroups Mage::app()->getWebsite()->getGroups();

            
$groups = array();
            foreach (
$websiteGroups as $group) {
                
$groups[$group->getId()] = $group;
            }
            
$this->setData('raw_groups'$groups);
        }
        return 
$this->getData('raw_groups');
    }

    public function 
getRawStores()
    {
        if (!
$this->hasData('raw_stores')) {
            
$websiteStores Mage::app()->getWebsite()->getStores();
            
$stores = array();
            foreach (
$websiteStores as $store) {
                
/* @var $store Mage_Core_Model_Store */
                
if (!$store->getIsActive()) {
                    continue;
                }
                
$store->setLocaleCode(Mage::getStoreConfig('general/locale/code'$store->getId()));

                
$params = array(
                    
'_query' => array()
                );
                if (!
$this->isStoreInUrl()) {
                    
$params['_query']['___store'] = $store->getCode();
                }
                
$baseUrl $store->getUrl(''$params);

                
$store->setHomeUrl($baseUrl);
                
$stores[$store->getGroupId()][$store->getId()] = $store;
            }
            
$this->setData('raw_stores'$stores);
        }
        return 
$this->getData('raw_stores');
    }

    
/**
     * Retrieve list of store groups with default urls set
     *
     * @return array
     */
    
public function getGroups()
    {
        if (!
$this->hasData('groups')) {
            
$rawGroups $this->getRawGroups();
            
$rawStores $this->getRawStores();

            
$groups = array();
            
$localeCode Mage::getStoreConfig('general/locale/code');
            foreach (
$rawGroups as $group) {
                
/* @var $group Mage_Core_Model_Store_Group */
                
if (!isset($rawStores[$group->getId()])) {
                    continue;
                }
                if (
$group->getId() == $this->getCurrentGroupId()) {
                    
$groups[] = $group;
                    continue;
                }

                
$store $group->getDefaultStoreByLocale($localeCode);

                if (
$store) {
                    
$group->setHomeUrl($store->getHomeUrl());
                    
$groups[] = $group;
                }
            }
            
$this->setData('groups'$groups);
        }
        return 
$this->getData('groups');
    }

    public function 
getStores()
    {
        if (!
$this->getData('stores')) {
            
$rawStores $this->getRawStores();

            
$groupId $this->getCurrentGroupId();
            if (!isset(
$rawStores[$groupId])) {
                
$stores = array();
            } else {
                
$stores $rawStores[$groupId];
            }
            
$this->setData('stores'$stores);
        }
        return 
$this->getData('stores');
    }

    public function 
getCurrentStoreCode()
    {
        return 
Mage::app()->getStore()->getCode();
    }

    public function 
isStoreInUrl()
    {
        if (
is_null($this->_storeInUrl)) {
            
$this->_storeInUrl Mage::getStoreConfigFlag(Mage_Core_Model_Store::XML_PATH_STORE_IN_URL);
        }
        return 
$this->_storeInUrl;
    }
}