<?php
/*********************************************************************************
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.

 * SuiteCRM is an extension to SugarCRM Community Edition developed by Salesagility Ltd.
 * Copyright (C) 2011 - 2014 Salesagility Ltd.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 *
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo and "Supercharged by SuiteCRM" logo. If the display of the logos is not
 * reasonably feasible for  technical reasons, the Appropriate Legal Notices must
 * display the words  "Powered by SugarCRM" and "Supercharged by SuiteCRM".
 ********************************************************************************/

/**
 * Language files management
 * @api
 */
class LanguageManager
{

	/**
	 * Called from VardefManager to allow for caching a lang file for a module
	 * @param module - the name of the module we are working with
	 * @param templates - an array of templates this module uses
	 */
	static function createLanguageFile($module , $templates=array('default'), $refresh = false){
		global $mod_strings, $current_language;
		if(inDeveloperMode() || !empty($_SESSION['developerMode'])){
        	$refresh = true;
    	}
		$temp_mod_strings = $mod_strings;
		$lang = $current_language;
        if(empty($lang))
            $lang = $GLOBALS['sugar_config']['default_language'];
		static $createdModules = array();
		if(empty($createdModules[$module]) && ($refresh || !file_exists(sugar_cached('modules/').$module.'/language/'.$lang.'.lang.php'))){
			$loaded_mod_strings = array();
			$loaded_mod_strings = LanguageManager::loadTemplateLanguage($module , $templates, $lang , $loaded_mod_strings);
			$createdModules[$module] = true;
			LanguageManager::refreshLanguage($module,$lang, $loaded_mod_strings);
		}
	}

	/**
	 * Load the module  tempalte lauguage files
	 * @param module - the name of the module we are working with
	 * @param templates - an array of templates this module uses
	 * @param lang - current language this module use
	 * @param loaded_mod_strings - the string that we will add the module template language  into
	 */
	static function loadTemplateLanguage($module , $templates , $lang, $loaded_mod_strings){
		$templates = array_reverse($templates);
		foreach($templates as $template){
			$temp = LanguageManager::addTemplate($module,$lang, $template);
			$loaded_mod_strings = sugarLangArrayMerge($loaded_mod_strings, $temp);
		}
		return $loaded_mod_strings;
	}

	static function addTemplate($module, $lang, $template){
		if($template == 'default')$template = 'basic';
		$templates = array();
		$fields = array();
		if(empty($templates[$template])){
			$path = 'include/SugarObjects/templates/' . $template . '/language/'.$lang.'.lang.php';
			if(file_exists($path)){
				require($path);
				$templates[$template] = $mod_strings;
			}else{
				$path = 'include/SugarObjects/implements/' . $template . '/language/'.$lang.'.lang.php';
				if(file_exists($path)){
					require($path);
					$templates[$template] = $mod_strings;
				}
			}
		}
		if(!empty($templates[$template])){
			return $templates[$template];
		}
	}

	static function saveCache($module,$lang, $loaded_mod_strings, $additonal_objects= array()){
		if(empty($lang))
			$lang = $GLOBALS['sugar_config']['default_language'];

		$file = create_cache_directory('modules/' . $module . '/language/'.$lang.'.lang.php');
		write_array_to_file('mod_strings',$loaded_mod_strings, $file);
		include($file);

		// put the item in the sugar cache.
		$key = self::getLanguageCacheKey($module,$lang);
		sugar_cache_put($key,$loaded_mod_strings);
	}

	/**
	 * clear out the language cache.
	 * @param string module_dir the module_dir to clear, if not specified then clear
	 *                      clear language cache for all modules.
	 * @param string lang the name of the object we are clearing this is for sugar_cache
	 */
	static function clearLanguageCache($module_dir = '', $lang = ''){
		if(empty($lang)) {
			$languages = array_keys($GLOBALS['sugar_config']['languages']);
		} else {
			$languages = array($lang);
		}
		//if we have a module name specified then just remove that language file
		//otherwise go through each module and clean up the language
		if(!empty($module_dir)) {
			foreach($languages as $clean_lang) {
				LanguageManager::_clearCache($module_dir, $clean_lang);
			}
		} else {
			$cache_dir = sugar_cached('modules/');
			if(file_exists($cache_dir) && $dir = @opendir($cache_dir)) {
				while(($entry = readdir($dir)) !== false) {
					if ($entry == "." || $entry == "..") continue;
						foreach($languages as $clean_lang) {
							LanguageManager::_clearCache($entry, $clean_lang);
						}
				}
				closedir($dir);
			}
		}
	}

	/**
	 * PRIVATE function used within clearLanguageCache so we do not repeat logic
	 * @param string module_dir the module_dir to clear
	 * @param string lang the name of the language file we are clearing this is for sugar_cache
	 */
	static function _clearCache($module_dir, $lang){
		if(!empty($module_dir) && !empty($lang)){
			$file = sugar_cached('modules/').$module_dir.'/language/'.$lang.'.lang.php';
			if(file_exists($file)){
				unlink($file);
				$key = self::getLanguageCacheKey($module_dir,$lang);
				sugar_cache_clear($key);
			}
		}
	}

	/**
	 * Given a module, search all of the specified locations, and any others as specified
	 * in order to refresh the cache file
	 *
	 * @param string $module the given module we want to load the vardefs for
	 * @param string $lang the given language we wish to load
	 * @param array $additional_search_paths an array which allows a consumer to pass in additional vardef locations to search
	 */
	static function refreshLanguage($module, $lang, $loaded_mod_strings = array(), $additional_search_paths = null){
		// Some of the vardefs do not correctly define dictionary as global.  Declare it first.
		$lang_paths = array(
					'modules/'.$module.'/language/'.$lang.'.lang.php',
					'modules/'.$module.'/language/'.$lang.'.lang.override.php',
					'custom/modules/'.$module.'/language/'.$lang.'.lang.php',
					'custom/modules/'.$module.'/Ext/Language/'.$lang.'.lang.ext.php',
				 );

		#27023, if this module template language file was not attached , get the template from this module vardef cache file if exsits and load the template language files.
		static $createdModules;
		if(empty($createdModules[$module]) && isset($GLOBALS['beanList'][$module])){
				$object = $GLOBALS['beanList'][$module];

				if ($object == 'aCase')
		            $object = 'Case';

		        if(!empty($GLOBALS["dictionary"]["$object"]["templates"])){
		        	$templates = $GLOBALS["dictionary"]["$object"]["templates"];
					$loaded_mod_strings = LanguageManager::loadTemplateLanguage($module , $templates, $lang , $loaded_mod_strings);
					$createdModules[$module] = true;
		        }
		}
		//end of fix #27023

		// Add in additional search paths if they were provided.
		if(!empty($additional_search_paths) && is_array($additional_search_paths))
		{
			$lang_paths = array_merge($lang_paths, $additional_search_paths);
		}

		//search a predefined set of locations for the vardef files
		foreach($lang_paths as $path){
			if(file_exists($path)){
				require($path);
				if(!empty($mod_strings)){
					if (function_exists('sugarArrayMergeRecursive')){
						$loaded_mod_strings = sugarArrayMergeRecursive($loaded_mod_strings, $mod_strings);
					}
					else{
						$loaded_mod_strings = sugarLangArrayMerge($loaded_mod_strings, $mod_strings);
					}
				}
			}
		}

		//great! now that we have loaded all of our vardefs.
		//let's go save them to the cache file.
		if(!empty($loaded_mod_strings))
			LanguageManager::saveCache($module, $lang, $loaded_mod_strings);
	}

	static function loadModuleLanguage($module, $lang, $refresh=false){
		//here check if the cache file exists, if it does then load it, if it doesn't
		//then call refreshVardef
		//if either our session or the system is set to developerMode then refresh is set to true

		// Retrieve the vardefs from cache.
		$key = self::getLanguageCacheKey($module,$lang);

		if(!$refresh)
		{
			$return_result = sugar_cache_retrieve($key);
			if(!empty($return_result) && is_array($return_result)){
				return $return_result;
			}
		}

		// Some of the vardefs do not correctly define dictionary as global.  Declare it first.
		$cachedfile = sugar_cached('modules/').$module.'/language/'.$lang.'.lang.php';
		if($refresh || !file_exists($cachedfile)){
			LanguageManager::refreshLanguage($module, $lang);
		}

		//at this point we should have the cache/modules/... file
		//which was created from the refreshVardefs so let's try to load it.
		if(file_exists($cachedfile)){
			global $mod_strings;

			require $cachedfile;

			// now that we hae loaded the data from disk, put it in the cache.
			if(!empty($mod_strings))
				sugar_cache_put($key,$mod_strings);
			if(!empty($_SESSION['translation_mode'])){
				$mod_strings = array_map('translated_prefix', $mod_strings);
			}
			return $mod_strings;
		}
	}

    /**
     * Return the cache key for the module language definition
     *
     * @static
     * @param  $module
     * @param  $lang
     * @return string
     */
    public static function getLanguageCacheKey($module, $lang)
	{
         return "LanguageManager.$module.$lang";
	}

    /**
     * Remove any cached js language strings.
     *
     * @static
     * @return void
     */
    public static function removeJSLanguageFiles()
    {
        $jsFiles = array();
        getFiles($jsFiles, sugar_cached('jsLanguage'));
        foreach($jsFiles as $file) {
            unlink($file);
        }

        if( empty($GLOBALS['sugar_config']['js_lang_version']) )
            $GLOBALS['sugar_config']['js_lang_version'] = 1;
        else
            $GLOBALS['sugar_config']['js_lang_version'] += 1;

        write_array_to_file( "sugar_config", $GLOBALS['sugar_config'], "config.php");
    }
}

function translated_prefix($key){
	return '[translated]' . $key;
}
