<?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_Backup
 * @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)
 */


/**
 * Backup Observer
 *
 * @category   Mage
 * @package    Mage_Backup
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Backup_Model_Observer
{
    const XML_PATH_BACKUP_ENABLED          = 'system/backup/enabled';
    const XML_PATH_BACKUP_TYPE             = 'system/backup/type';
    const XML_PATH_BACKUP_MAINTENANCE_MODE = 'system/backup/maintenance';

    /**
     * Error messages
     *
     * @var array
     */
    protected $_errors = array();

    /**
     * Create Backup
     *
     * @return Mage_Log_Model_Cron
     */
    public function scheduledBackup()
    {
        if (!Mage::getStoreConfigFlag(self::XML_PATH_BACKUP_ENABLED)) {
            return $this;
        }

        if (Mage::getStoreConfigFlag(self::XML_PATH_BACKUP_MAINTENANCE_MODE)) {
            Mage::helper('backup')->turnOnMaintenanceMode();
        }

        $type = Mage::getStoreConfig(self::XML_PATH_BACKUP_TYPE);

        $this->_errors = array();
        try {
            $backupManager = Mage_Backup::getBackupInstance($type)
                ->setBackupExtension(Mage::helper('backup')->getExtensionByType($type))
                ->setTime(time())
                ->setBackupsDir(Mage::helper('backup')->getBackupsDir());

            Mage::register('backup_manager', $backupManager);

            if ($type != Mage_Backup_Helper_Data::TYPE_DB) {
                $backupManager->setRootDir(Mage::getBaseDir())
                    ->addIgnorePaths(Mage::helper('backup')->getBackupIgnorePaths());
            }

            $backupManager->create();
            Mage::log(Mage::helper('backup')->getCreateSuccessMessageByType($type));
        }
        catch (Exception $e) {
            $this->_errors[] = $e->getMessage();
            $this->_errors[] = $e->getTrace();
            Mage::log($e->getMessage(), Zend_Log::ERR);
            Mage::logException($e);
        }

        if (Mage::getStoreConfigFlag(self::XML_PATH_BACKUP_MAINTENANCE_MODE)) {
            Mage::helper('backup')->turnOffMaintenanceMode();
        }

        return $this;
    }
}