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

/**
 * @since 1.5.0
 */
class TranslateCore
{
	/**
	 * Get a translation for an admin controller
	 *
	 * @param $string
	 * @param string $class
	 * @param bool $addslashes
	 * @param bool $htmlentities
	 * @return string
	 */
	public static function getAdminTranslation($string, $class = 'AdminTab', $addslashes = false, $htmlentities = true)
	{
		static $modules_tabs = null;

		// @todo remove global keyword in translations files and use static
		global $_LANGADM;

		if (!isset($modules_tabs))
			$modules_tabs = Tab::getModuleTabList();

		if ($_LANGADM == null)
		{
			$iso = Context::getContext()->language->iso_code;
			include_once(_PS_TRANSLATIONS_DIR_.$iso.'/admin.php');
		}

		if (isset($modules_tabs[strtolower($class)]))
		{
			$class_name_controller = $class.'controller';
			// if the class is extended by a module, use modules/[module_name]/xx.php lang file
			if (class_exists($class_name_controller) && Module::getModuleNameFromClass($class_name_controller))
			{
				$string = str_replace('\'', '\\\'', $string);
				return Translate::getModuleTranslation(Module::$classInModule[$class_name_controller], $string, $class);
			}
		}

		$key = md5(str_replace('\'', '\\\'', $string));
		if (isset($_LANGADM[$class.$key]))
			$str = $_LANGADM[$class.$key];
		else
			$str = Translate::getGenericAdminTranslation($string, $key, $_LANGADM);

		$str = $htmlentities ? htmlentities($str, ENT_QUOTES, 'utf-8') : $str;
		return str_replace('"', '&quot;', ($addslashes ? addslashes($str) : stripslashes($str)));
	}

	/**
	 * Return the translation for a string if it exists for the base AdminController or for helpers
	 *
	 * @static
	 * @param $string string to translate
	 * @param null $key md5 key if already calculated (optional)
	 * @param $lang_array global array of admin translations
	 * @return string translation
	 */
	public static function getGenericAdminTranslation($string, $key = null, $lang_array)
	{
		if (is_null($key))
			$key = md5(str_replace('\'', '\\\'', $string));

		if (isset($lang_array['AdminController'.$key]))
			$str = $lang_array['AdminController'.$key];
		else if (isset($lang_array['Helper'.$key]))
			$str = $lang_array['Helper'.$key];
		else if (isset($lang_array['AdminTab'.$key]))
			$str = $lang_array['AdminTab'.$key];
		else
			// note in 1.5, some translations has moved from AdminXX to helper/*.tpl
			$str = $string;

		return $str;
	}

	/**
	 * Get a translation for a module
	 *
	 * @param string|Module $module
	 * @param string $string
	 * @param string $source
	 * @return string
	 */
	public static function getModuleTranslation($module, $string, $source)
	{
		global $_MODULES, $_MODULE, $_LANGADM;
		static $lang_cache = array();
		static $translations_merged = array();

		if ($module instanceof Module)
		{
			$name = $module->name;
			$local_path = $module->getLocalPath();
		}
		else
		{
			$name = $module;
			$local_path = _PS_MODULE_DIR_.$module.'/';
		}

		// @retrocompatibility with translations files in module root
		if (Tools::file_exists_cache($local_path.'/translations/'.Context::getContext()->language->iso_code.'.php'))
			$file = $local_path.'/translations/'.Context::getContext()->language->iso_code.'.php';
		else
			$file = $local_path.'/'.Context::getContext()->language->iso_code.'.php';

		if (Tools::file_exists_cache($file) && include_once($file))
		{
			if (!isset($translations_merged[md5($file)]))
				$_MODULES = !empty($_MODULES) ? array_merge($_MODULES, $_MODULE) : $_MODULE;
			$translations_merged[md5($file)] = true;
		}

		$string = str_replace('\'', '\\\'', $string);

		$cache_key = $name.'|'.$string.'|'.$source;
		if (!isset($lang_cache[$cache_key]))
		{
			if ($_MODULES == null)
				return str_replace('"', '&quot;', $string);

			// set array key to lowercase for 1.3 compatibility
			$_MODULES = array_change_key_case($_MODULES);
			$currentKey = '<{'.strtolower($name).'}'.strtolower(_THEME_NAME_).'>'.strtolower($source).'_'.md5($string);
			$defaultKey = '<{'.strtolower($name).'}prestashop>'.strtolower($source).'_'.md5($string);

			if (isset($_MODULES[$currentKey]))
				$ret = stripslashes($_MODULES[$currentKey]);
			elseif (isset($_MODULES[Tools::strtolower($currentKey)]))
				$ret = stripslashes($_MODULES[Tools::strtolower($currentKey)]);
			elseif (isset($_MODULES[$defaultKey]))
				$ret = stripslashes($_MODULES[$defaultKey]);
			elseif (isset($_MODULES[Tools::strtolower($defaultKey)]))
				$ret = stripslashes($_MODULES[Tools::strtolower($defaultKey)]);
			// if translation was not found in module, look for it in AdminController or Helpers
			elseif (!empty($_LANGADM))
				$ret = Translate::getGenericAdminTranslation($string, null, $_LANGADM);
			else
				$ret = stripslashes($string);

			$lang_cache[$cache_key] = str_replace('"', '&quot;', $ret);
		}
		return $lang_cache[$cache_key];
	}

	/**
	 * Get a translation for a PDF
	 *
	 * @param string $string
	 * @return string
	 */
	public static function getPdfTranslation($string)
	{
		global $_LANGPDF;

		$iso = Context::getContext()->language->iso_code;
		if (!Validate::isLanguageIsoCode($iso))
			throw PrestaShopException('Invalid iso lang!');

		$filename = _PS_THEME_DIR_.'pdf/lang/'.$iso.'.php';

		if (Tools::file_exists_cache($filename))
			@include_once($filename);

		$key = 'PDF'.md5($string);
		$lang_array = $_LANGPDF;

		$msg = $string;
		if (is_array($lang_array) && key_exists($key, $lang_array))
			$msg = $lang_array[$key];
		elseif (is_array($lang_array) && key_exists(Tools::strtolower($key), $lang_array))
			$msg = $lang_array[Tools::strtolower($key)];

		return $msg;
	}
}