feat(translateService): add storage() method

- returns a registered storage

ngTranslate/translate.js

@@ -1,20 +1,22 @@
 angular.module('ngTranslate', ['ng', 'ngCookies'])
 
-.run(['$translate', '$cookieStore', function ($translate, $cookieStore) {
+.run(['$translate', function ($translate) {
 
-  var key = $translate.storageKey();
-  if ($translate.rememberLanguage()) {
-    if (!$cookieStore.get(key)) {
+  var key = $translate.storageKey(),
+      storage = $translate.storage();
+
+  if (storage) {
+    if (!storage.get(key)) {
 
       if (angular.isString($translate.preferredLanguage())) {
         // $translate.uses method will both set up and remember the language in case it's loaded successfully
         $translate.uses($translate.preferredLanguage());
       } else {
-        $cookieStore.put(key, $translate.uses());
+        storage.set(key, $translate.uses());
       }
 
     } else {
-      $translate.uses($cookieStore.get(key));
+      $translate.uses(storage.get(key));
     }
   } else if (angular.isString($translate.preferredLanguage())) {
     $translate.uses($translate.preferredLanguage());

ngTranslate/translateLocalStorage.js

@@ -10,7 +10,16 @@ angular.module('ngTranslate')
  * to use localStorage as storage.
  *
  */
-.factory('$translateLocalStorage', ['$window', function ($window) {
+.factory('$translateLocalStorage', ['$window', '$translateCookieStorage', function ($window) {
+
+  // Setup adapter
+  var localStorageAdapter = {
+    get: function (name) { return $window.localStorage.getItem(name); },
+    set: function (name, value) { $window.localStorage.setItem(name, value); }
+  };
+
+  var storage = ('localStorage' in $window && $window['localStorage'] !== null) ?
+  localStorageAdapter : $translateCookieStorage;
 
   var $translateLocalStorage = {
 
@@ -26,7 +35,7 @@ angular.module('ngTranslate')
      * @return {string} Value of item name
      */
     get: function (name) {
-      return $window.localStorage.getItem(name);
+      return storage.get(name);
     },
 
     /**
@@ -41,7 +50,7 @@ angular.module('ngTranslate')
      * @param {string} value Item value
      */
     set: function (name, value) {
-      $window.localStorage.setItem(name, value);
+      storage.set(name, value);
     }
   };
 

test/unit/translateServiceSpec.js

@@ -628,7 +628,7 @@ describe('ngTranslate', function () {
     });
 
     describe('useLocalStorage()', function () {
-
+      
     });
 
     describe('useCookieStorage()', function () {