<?php
/*
* 2007-2012 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  2007-2012 PrestaShop SA
*  @version  Release: $Revision: 15238 $
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class Autoupgrade extends Module
{
	function __construct()
	{
		$this->name = 'autoupgrade';
		$this->tab = 'administration';
		$this->author = 'PrestaShop';
		// version number x.y.z 
		// x=0 means not yet considered as fully stable
		// y+1 means a major bugfix or improvement
		// z+1 means a bugfix, optimization or minor improvements
		$this->version = '0.3.4';

		if (!defined('_PS_ADMIN_DIR_'))
		{
			if (defined('PS_ADMIN_DIR'))
				define('_PS_ADMIN_DIR_',PS_ADMIN_DIR);
			else
			{
				$this->_errors[] = $this->l('This version of PrestaShop cannot be upgraded : PS_ADMIN_DIR constant is missing');
				$autoupgradeCanWork = false;
			}
		}

		parent::__construct();

		$this->displayName = $this->l('Autoupgrade module');
		$this->description = $this->l('Provides an automated method to upgrade your shop to the last PrestaShop version. Caution : custom theme are not updated.');

	}
	function install()
	{
		$res = true;
		// before adding AdminSelfUpgrade, we should remove AdminUpgrade
		$idTab = Tab::getIdFromClassName('AdminUpgrade');
		if ($idTab)
		{
			$tab = new Tab($idTab);
			// this deletion will not cancel the installation
			$resDelete = $tab->delete();
			if (!$resDelete)
				$this->_errors[] = sprintf($this->l('Unable to delete outdated AdminUpgrade tab %s'), $idTab);
		}
		
		$idTab = Tab::getIdFromClassName('AdminSelfUpgrade');
		// Then we add AdminSelfUpgrade only if not exists
		if (!$idTab)
		{
			$tab = new Tab();
			$tab->class_name = 'AdminSelfUpgrade';
			$tab->module = 'autoupgrade';
			$tab->id_parent = 9;
			$languages = Language::getLanguages(false);
			foreach ($languages as $lang)
				$tab->name[$lang['id_lang']] = 'Upgrade';
			$res &= $tab->save();
			if (!$res)
				$this->_errors[] = $this->l('New tab "AdminSelfUpgrade" cannot be created');
		}
		else
			$tab = new Tab($idTab);

		Configuration::updateValue('PS_AUTOUPDATE_MODULE_IDTAB', $tab->id);

		$autoupgradeDir = _PS_ADMIN_DIR_.DIRECTORY_SEPARATOR.'autoupgrade';
		if ($res && !file_exists($autoupgradeDir))
		{
			$res &= @mkdir($autoupgradeDir, 0755);
			if (!$res)
				$this->_errors[] = sprintf($this->l('unable to create %s'), $autoupgradeDir);
		}

		if ($res && file_exists($autoupgradeDir.DIRECTORY_SEPARATOR.'ajax-upgradetab.php'))
			$res &= unlink($autoupgradeDir.DIRECTORY_SEPARATOR.'ajax-upgradetab.php');

		if (!defined('_PS_MODULE_DIR_'))
		{
			define('_PS_MODULE_DIR_', _PS_ROOT_DIR_.'/modules/');
		}
		
		if ($res) 
			if (!is_writable($autoupgradeDir))
			{
				$res = false;
				$this->_errors[] = sprintf($this->l('%s is not writable'), $autoupgradeDir);
			}
		
		if ($res)
		{
			$res &= copy(_PS_MODULE_DIR_.'autoupgrade/ajax-upgradetab.php', $autoupgradeDir.DIRECTORY_SEPARATOR.'ajax-upgradetab.php');
			if (!$res)
			{
				$res = false;
				$this->_errors[] = sprintf($this->l('Unable to copy ajax-upgradetab.php in %s'), $autoupgradeDir);
			}
		}
		
		if ($res)
		{
			$res &= copy(_PS_MODULE_DIR_.'autoupgrade/logo.gif',_PS_ROOT_DIR_. DIRECTORY_SEPARATOR . 'img/t/AdminSelfUpgrade.gif');
			if (!$res)
			{
				$res = false;
				$this->_errors[] = sprintf($this->l('Unable to copy logo.gif in %s'), $autoupgradeDir);
			}
		}

		if ($res && !file_exists(_PS_ROOT_DIR_.'/config/xml'))
			$res &= @mkdir(_PS_ROOT_DIR_.'/config/xml', 0755);
		if (!$res 
			OR !Tab::getIdFromClassName('AdminSelfUpgrade')
			OR !parent::install())
		{
			parent::uninstall();
			return false;
		}

		return true;
	}

	public function uninstall()
	{
		$id_tab = Configuration::get('PS_AUTOUPDATE_MODULE_IDTAB');
		if ($id_tab)
		{
			$tab = new Tab($id_tab,1);
			$res = $tab->delete();
		}
		else
			$res = true;
		// for people in 1.4.4.0 or 1.4.4.1, we have to remove that file
		// and of course delete it in the database.
		if (file_exists(_PS_ADMIN_DIR_.DIRECTORY_SEPARATOR.'tabs'.'AdminUpgrade.php'))
		{
			if($idOldTab = Tab::getIdFromClassName('AdminUpgrade'))
			{
				$tab = new Tab($idOldTab);
				$res &= $tab->delete();
			}
			$res &= unlink(_PS_ADMIN_DIR_.DIRECTORY_SEPARATOR.'tabs'.'AdminUpgrade.php');
		}
		
		// if the function does not exists, ignore it
		// (there is no return value in Tools::deleteDirectory)
		if (method_exists('Tools', 'deleteDirectory'))
			Tools::deleteDirectory(_PS_ADMIN_DIR_.DIRECTORY_SEPARATOR.'autoupgrade', false);

		if (!$res OR !parent::uninstall())
			return false;

		return true;
	}
}