<?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_Adminhtml
 * @copyright  Copyright (c) 2006-2016 X.commerce, Inc. and affiliates (http://www.magento.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * System config image field backend model
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Model_System_Config_Backend_Image extends Mage_Adminhtml_Model_System_Config_Backend_File
{
    /**
     * Getter for allowed extensions of uploaded files
     *
     * @return array
     */
    protected function _getAllowedExtensions()
    {
        return array('jpg', 'jpeg', 'gif', 'png');
    }

    /**
     * Overwritten parent method for adding validators
     *
     * @param Mage_Core_Model_File_Uploader $uploader
     */
    protected function addValidators(Mage_Core_Model_File_Uploader $uploader)
    {
        parent::addValidators($uploader);
        $validator = new Mage_Core_Model_File_Validator_Image();
        $validator->setAllowedImageTypes($this->_getAllowedExtensions());
        $uploader->addValidateCallback(Mage_Core_Model_File_Validator_Image::NAME, $validator, 'validate');
    }
}