<?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)
 */

/**
 * Adminhtml grid item renderer datetime
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author     Magento Core Team <core@magentocommerce.com>
 */

class Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Datetime
    extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
{
    /**
     * Date format string
     */
    protected static $_format = null;

    /**
     * Retrieve datetime format
     *
     * @return unknown
     */
    protected function _getFormat()
    {
        $format = $this->getColumn()->getFormat();
        if (!$format) {
            if (is_null(self::$_format)) {
                try {
                    self::$_format = Mage::app()->getLocale()->getDateTimeFormat(
                        Mage_Core_Model_Locale::FORMAT_TYPE_MEDIUM
                    );
                }
                catch (Exception $e) {
                    Mage::logException($e);
                }
            }
            $format = self::$_format;
        }
        return $format;
    }

    /**
     * Renders grid column
     *
     * @param   Varien_Object $row
     * @return  string
     */
    public function render(Varien_Object $row)
    {
        if ($data = $this->_getValue($row)) {
            $format = $this->_getFormat();
            try {
                $data = Mage::app()->getLocale()
                    ->date($data, Varien_Date::DATETIME_INTERNAL_FORMAT)->toString($format);
            }
            catch (Exception $e)
            {
                $data = Mage::app()->getLocale()
                    ->date($data, Varien_Date::DATETIME_INTERNAL_FORMAT)->toString($format);
            }
            return $data;
        }
        return $this->getColumn()->getDefault();
    }
}