<?php
/*
* 2007-2011 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:
* 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@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  2007-2011 PrestaShop SA
*  @version  Release: $Revision$
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class InstallModelDatabase extends InstallAbstractModel
{
	/**
	 * Check database configuration and try a connection
	 *
	 * @param string $server
	 * @param string $database
	 * @param string $login
	 * @param string $password
	 * @param string $prefix
	 * @param string $engine
	 * @param bool $clear
	 * @return array List of errors
	 */
	public function testDatabaseSettings($server, $database, $login, $password, $prefix, $engine, $clear)
	{
		$errors = array();

		// Check if fields are correctly typed
		if (!$server || !Validate::isUrl($server))
			$errors[] = $this->language->l('Server name is not valid');

		if (!$database)
			$errors[] = $this->language->l('You must enter a database name');

		if (!$login)
			$errors[] = $this->language->l('You must enter a database login');

		if (!$prefix || !Validate::isTablePrefix($prefix))
			$errors[] = $this->language->l('Tables prefix is invalid');

		if (!Validate::isMySQLEngine($engine))
			$errors[] = $this->language->l('Wrong engine chosen for MySQL');

		if (!$errors)
		{
			// Try to connect to database
			switch (Db::checkConnection($server, $login, $password, $database, true, $engine))
			{
				case 0:
					if (!Db::checkEncoding($server, $login, $password))
						$errors[] = $this->language->l('Cannot convert database data to utf-8');

					// Check if a table with same prefix already exists
					if (!$clear && Db::hasTableWithSamePrefix($server, $login, $password, $database, $prefix))
						$errors[] = $this->language->l('At least one table with same prefix was already found, please change your prefix or drop your database');
				break;

				case 1:
					$errors[] = $this->language->l('Database Server is not found. Please verify the login, password and server fields');
				break;

				case 2:
					$errors[] = $this->language->l('Connection to MySQL server succeeded, but database "%s" not found', $database);
				break;

				case 4:
					$errors[] = $this->language->l('Engine innoDB is not supported by your MySQL server, please use MyISAM');
				break;
			}
		}

		return $errors;
	}
}