feat(i18n): translation service

ionic/components/app/app.ts

@@ -14,6 +14,7 @@ import {Popup} from '../popup/popup';
 import {FocusHolder} from '../form/focus-holder';
 import {Events} from '../../util/events';
 import {NavRegistry} from '../nav/nav-registry';
+import {Translate} from '../../translation/translate';
 
 /**
  * @name IonicApp
@@ -298,6 +299,8 @@ export function ionicBootstrap(rootComponentType, views, config) {
       let modal = new Modal(app, config);
       let popup = new Popup(app, config);
       let events = new Events();
+      let translate = new Translate();
+      console.log('Translate', translate);
       let navRegistry = new NavRegistry(views);
 
       // add injectables that will be available to all child components
@@ -312,6 +315,7 @@ export function ionicBootstrap(rootComponentType, views, config) {
         bind(Events).toValue(events),
         ROUTER_BINDINGS,
         bind(LocationStrategy).toClass(HashLocationStrategy),
+        bind(Translate).toValue(translate),
         bind(NavRegistry).toValue(navRegistry)
       ]);
 

ionic/ionic.ts

@@ -24,3 +24,5 @@ export * from './transitions/ios-transition'
 export * from './transitions/md-transition'
 
 export * from './platform/plugins'
+
+export * from './translation/translate'

ionic/translation/translate.ts

@@ -0,0 +1,45 @@
+import {Injectable} from 'angular2/angular2';
+
+@Injectable()
+export class Translate {
+  constructor() {
+    this._transMap = {};
+  }
+
+  translations(lang, map) {
+    this._transMap[lang] = map;
+  }
+
+  setLanguage(lang) {
+    this._language = lang;
+  }
+
+  getTranslations(lang) {
+    return this._transMap[lang];
+  }
+
+  translate(lang, key) {
+    // If called with just one param, first is the key
+    if(typeof key === 'undefined') {
+      key = lang;
+      lang = this._language;
+    }
+
+    // If the language isn't specified, return the string passed.
+    if(!lang) {
+      return key;
+    }
+
+    let map = this.getTranslations(lang);
+
+    if(!map) {
+      console.warn('I18N: No translation for key', key, 'using language', this._language);
+      return '';
+    }
+    return this._getTranslation(map, key);
+  }
+
+  _getTranslation(map, key) {
+    return map && map[key] || '';
+  }
+}