<?php
/**
 * 2007-2018 PrestaShop
 *
 * 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:
 * https://opensource.org/licenses/OSL-3.0
 * 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@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to http://www.prestashop.com for more information.
 *
 * @author    PrestaShop SA <contact@prestashop.com>
 * @copyright 2007-2018 PrestaShop SA
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 * International Registered Trademark & Property of PrestaShop SA
 */

function configuration_double_cleaner()
{
    $result = Db::getInstance()->executeS('
	SELECT name, MIN(id_configuration) AS minid
	FROM '._DB_PREFIX_.'configuration
	GROUP BY name
	HAVING count(name) > 1');
    foreach ($result as $row) {
        DB::getInstance()->execute('
		DELETE FROM '._DB_PREFIX_.'configuration
		WHERE name = \''.addslashes($row['name']).'\'
		AND id_configuration != '.(int)($row['minid']));
    }
    DB::getInstance()->execute('
	DELETE FROM '._DB_PREFIX_.'configuration_lang
	WHERE id_configuration NOT IN (
		SELECT id_configuration
		FROM '._DB_PREFIX_.'configuration)');
}
