Make the list of available languages for CryptPad configurable

customize.dist/messages.js

@@ -43,13 +43,31 @@ require.config({
     }
 });
 
-var req = ['/common/common-util.js', '/customize/translations/messages.js'];
+var req = [
+    '/common/common-util.js',
+    '/customize/application_config.js',
+    '/customize/translations/messages.js'
+];
 if (language && map[language]) { req.push('/customize/translations/messages.' + language + '.js'); }
 
-define(req, function(Util, Default, Language) {
+define(req, function(Util, AppConfig, Default, Language) {
     map.en = 'English';
     var defaultLanguage = 'en';
 
+    if (AppConfig.availableLanguages) {
+        if (AppConfig.availableLanguages.indexOf(language) === -1) {
+            language = defaultLanguage;
+            Language = Default;
+            localStorage.setItem(LS_LANG, language);
+        }
+        Object.keys(map).forEach(function (l) {
+            if (l === defaultLanguage) { return; }
+            if (AppConfig.availableLanguages.indexOf(l) === -1) {
+                delete map[l];
+            }
+        });
+    }
+
     Util.extend(messages, Default);
     if (Language && language !== defaultLanguage) {
         // Add the translated keys to the returned object

www/common/application_config_internal.js

@@ -22,13 +22,23 @@ define(function() {
      */
     config.registeredOnlyTypes = ['file', 'contacts', 'oodoc', 'ooslide', 'sheet'];
 
+    /* CryptPad is available is multiple languages, but only English and French are maintained
+     * by the developers. The other languages may be outdated, and any missing string for a langauge
+     * will use the english version instead. You can customize the langauges you want to be available
+     * on your instance by removing them from the following list.
+     * An empty list will load all available languages for CryptPad. The list of available languages
+     * can be found at the top of the file `/customize.dist/messages.js`. The list should only
+     * contain languages code ('en', 'fr', 'de', 'pt-br', etc.), not their full name.
+     */
+    //config.availableLanguages = ['en', 'fr', 'de'];
+
+
     /*  Cryptpad apps use a common API to display notifications to users
      *  by default, notifications are hidden after 5 seconds
      *  You can change their duration here (measured in milliseconds)
      */
     config.notificationTimeout = 5000;
     config.disableUserlistNotifications = false;
-    config.hideLoadingScreenTips = false;
 
     config.enablePinning = true;