Default to english translation

This introduces a new function t(), which can be called to retrieve a
translation for a certain key value in a certain language.
If no translation is found in the current language, it defaults to
english. If no english translation is found, it returns the given key.
This is to avoid displaying "undefined" or no message at all.

Author: fbarbe00

src/index.js

@@ -15,7 +15,7 @@ require('./polyfill');
 
 var parsedOptions = links.parse(window.location.search.slice(1));
 var mergedOptions = L.extend(leafletOptions.defaultState, parsedOptions);
-var local = localization.get(mergedOptions.language);
+var language = mergedOptions.language;
 
 // load only after language was chosen
 var ItineraryBuilder = require('./itinerary_builder')(mergedOptions.language);
@@ -115,8 +115,8 @@ var plan = new ReversablePlan([], {
   dragStyles: options.lrm.dragStyles,
   geocodersClassName: options.lrm.geocodersClassName,
   geocoderPlaceholder: function(i, n) {
-    var startend = [local['Start - press enter to drop marker'], local['End - press enter to drop marker']];
-    var via = [local['Via point - press enter to drop marker']];
+    var startend = [localization.t(language, 'Start - press enter to drop marker'), localization.t(language, 'End - press enter to drop marker')];
+    var via = [localization.t(language, 'Via point - press enter to drop marker')];
     if (i === 0) {
       return startend[0];
     }
@@ -142,11 +142,14 @@ var controlOptions = {
   showAlternatives: options.lrm.showAlternatives,
   units: mergedOptions.units,
   serviceUrl: leafletOptions.services[0].path,
+  useHints: false,
+  services: leafletOptions.services,
   useZoomParameter: options.lrm.useZoomParameter,
   routeDragInterval: options.lrm.routeDragInterval,
   collapsible: options.lrm.collapsible,
   itineraryBuilder: new ItineraryBuilder(),
 };
+
 var router = (new L.Routing.OSRMv1(controlOptions));
 router._convertRouteOriginal = router._convertRoute;
 router._convertRoute = function(responseRoute) {

src/localization.js

@@ -12,19 +12,26 @@ var language_mapping = {
   hu: require('../i18n/hu'),
   vi: require('../i18n/vi'),
   'pt-BR': require('../i18n/pt-BR'),
-  'zh-Hans': require('../i18n/zh-Hans')
 };
 
 module.exports = {
-  getLanguages: function() {
+  getLanguages: function () {
     var languages = {};
-    for (var key in language_mapping)
-    {
-       languages[key] = language_mapping[key].name;
+    for (var key in language_mapping) {
+      languages[key] = language_mapping[key].name;
     }
     return languages;
   },
-  get: function(language) {
-  return language_mapping[language];
-}
+  get: function (language) {
+    return language_mapping[language];
+  },
+  t: function (language, key) {
+    if (language_mapping[language] && language_mapping[language][key]) {
+      return language_mapping[language][key];
+    } else if (language_mapping['en'] && language_mapping['en'][key]) {
+      return language_mapping['en'][key];
+    } else {
+      return key;
+    }
+  }
 };