<?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@magentocommerce.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.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Adminhtml
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Store grid column filter
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_Widget_Grid_Column_Filter_Store
    extends Mage_Adminhtml_Block_Widget_Grid_Column_Filter_Abstract
{

    /**
     * Render HTML of the element
     *
     * @return string
     */
    public function getHtml()
    {
        $storeModel = Mage::getSingleton('adminhtml/system_store');
        /* @var $storeModel Mage_Adminhtml_Model_System_Store */
        $websiteCollection = $storeModel->getWebsiteCollection();
        $groupCollection = $storeModel->getGroupCollection();
        $storeCollection = $storeModel->getStoreCollection();

        $allShow = $this->getColumn()->getStoreAll();

        $html  = '<select name="' . $this->escapeHtml($this->_getHtmlName()) . '" '
               . $this->getColumn()->getValidateClass() . '>';
        $value = $this->getColumn()->getValue();
        if ($allShow) {
            $html .= '<option value="0"' . ($value == 0 ? ' selected="selected"' : '') . '>'
                  . Mage::helper('adminhtml')->__('All Store Views') . '</option>';
        } else {
            $html .= '<option value=""' . (!$value ? ' selected="selected"' : '') . '></option>';
        }
        foreach ($websiteCollection as $website) {
            $websiteShow = false;
            foreach ($groupCollection as $group) {
                if ($group->getWebsiteId() != $website->getId()) {
                    continue;
                }
                $groupShow = false;
                foreach ($storeCollection as $store) {
                    if ($store->getGroupId() != $group->getId()) {
                        continue;
                    }
                    if (!$websiteShow) {
                        $websiteShow = true;
                        $html .= '<optgroup label="' . $this->escapeHtml($website->getName()) . '"></optgroup>';
                    }
                    if (!$groupShow) {
                        $groupShow = true;
                        $html .= '<optgroup label="&nbsp;&nbsp;&nbsp;&nbsp;'
                              . $this->escapeHtml($group->getName()) . '">';
                    }
                    $value = $this->getValue();
                    $selected = $value == $store->getId() ? ' selected="selected"' : '';
                    $html .= '<option value="' . $store->getId() . '"' . $selected . '>&nbsp;&nbsp;&nbsp;&nbsp;'
                          . $this->escapeHtml($store->getName()) . '</option>';
                }
                if ($groupShow) {
                    $html .= '</optgroup>';
                }
            }
        }
        if ($this->getColumn()->getDisplayDeleted()) {
            $selected = ($this->getValue() == '_deleted_') ? ' selected' : '';
            $html.= '<option value="_deleted_"'.$selected.'>'.$this->__('[ deleted ]').'</option>';
        }
        $html .= '</select>';
        return $html;
    }

    /**
     * Form condition from element's value
     *
     * @return array|null
     */
    public function getCondition()
    {
        if (is_null($this->getValue())) {
            return null;
        }
        if ($this->getValue() == '_deleted_') {
            return array('null' => true);
        } else {
            return array('eq' => $this->getValue());
        }
    }

}
