From 0aa128b53e3c9f6752daa4f4787193f9a56ff2ea Mon Sep 17 00:00:00 2001
From: Ralf Becker <ralfbecker@outdoor-training.de>
Date: Sun, 21 Aug 2011 20:09:14 +0000
Subject: [PATCH] Loading translations like other javascript files: setting
 headers to allow browser to cache the file until it's etag containing the
 creationdates of the used langfiles changes --> et2 can now use egw_lang
 object to translate labels, options, ...

---
 etemplate/inc/class.etemplate_new.inc.php |  9 ++++
 phpgwapi/inc/class.egw.inc.php            |  2 +-
 phpgwapi/lang.php                         | 53 +++++++++++++++++++++++
 3 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 phpgwapi/lang.php

diff --git a/etemplate/inc/class.etemplate_new.inc.php b/etemplate/inc/class.etemplate_new.inc.php
index f83a69a6fa..294043c1a0 100644
--- a/etemplate/inc/class.etemplate_new.inc.php
+++ b/etemplate/inc/class.etemplate_new.inc.php
@@ -103,6 +103,15 @@ class etemplate_new extends etemplate_widget_template
 	{
 		if (!$this->rel_path) throw new egw_exception_assertion_failed('No (valid) template read!');
 
+		// load translations
+		translation::add_app('etemplate');
+		foreach(translation::$loaded_apps as $app => $lang)
+		{
+			egw_framework::validate_file('/phpgwapi/lang.php', array(
+				'app' => $app,
+				'lang' => $lang,
+			));
+		}
 		// generate new etemplate request object
 		self::$request = etemplate_request::read();
 		self::$request->output_mode = $output_mode;	// let extensions "know" they are run eg. in a popup
diff --git a/phpgwapi/inc/class.egw.inc.php b/phpgwapi/inc/class.egw.inc.php
index 955efc528b..c51a4d6d75 100644
--- a/phpgwapi/inc/class.egw.inc.php
+++ b/phpgwapi/inc/class.egw.inc.php
@@ -234,7 +234,7 @@ class egw extends egw_minimal
 			$this->template->set_root(EGW_APP_TPL);
 		}
 		// init the translation class, necessary as own wakeup would run before our's
-		translation::init();
+		translation::init(isset($GLOBALS['egw_info']['flags']['load_translations']) ? $GLOBALS['egw_info']['flags']['load_translations'] : true);
 
 		$this->unset_datetime();
 
diff --git a/phpgwapi/lang.php b/phpgwapi/lang.php
new file mode 100644
index 0000000000..805bf9aa76
--- /dev/null
+++ b/phpgwapi/lang.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ * API: loading translation from from browser
+ *
+ * Usage: /egroupware/phpgwapi/lang.php?app=infolog&lang=de
+ *
+ * @link www.egroupware.org
+ * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
+ * @package addressbook
+ * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
+ * @version $Id$
+ */
+
+$GLOBALS['egw_info'] = array(
+	'flags' => array(
+		'currentapp' => in_array($_GET['app'],array('etemplate','common')) ? 'home' : $_GET['app'],
+		'noheader' => true,
+		'load_translations' => false,	// do not automatically load translations
+		'nocachecontrol' => true,
+	)
+);
+
+include '../header.inc.php';
+
+// use an etag with app, lang and a hash over the creation-times of all lang-files
+$etag = '"'.$_GET['app'].'-'.$_GET['lang'].'-'.md5($GLOBALS['egw_info']['server']['lang_ctimes']).'"';
+
+// headers to allow caching of one month
+Header('Content-Type: text/javascript; charset=utf-8');
+Header('Cache-Control: public, no-transform');
+Header('Pragma: cache');
+Header('ETag: '.$etag);
+
+// if servers send a If-None-Match header, response with 304 Not Modified, if etag matches
+if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] == $etag)
+{
+	header("HTTP/1.1 304 Not Modified");
+	common::egw_exit();
+}
+
+translation::add_app($_GET['app'], $_GET['lang']);
+if (!count(translation::$lang_arr))
+{
+	translation::add_app($_GET['app'], 'en');
+}
+
+
+echo '
+if (typeof egw_lang == "undefined") egw_lang = {};
+egw_lang.'.$_GET['app'].' = '.json_encode(translation::$lang_arr);
+
+// Content-Lenght header is important, otherwise browsers dont cache!
+Header('Content-Length: '.ob_get_length());
\ No newline at end of file