server update detection

app/app.js

@@ -150,7 +150,41 @@ angular.module('app', [
 
             $urlRouterProvider.otherwise('/');
     }])
-    .run(['$rootScope', '$transitions', 'AppUtilsBusiness', 'ssSideNav', '$translate', function ($rootScope, $transitions, AppUtilsBusiness, ssSideNav, $translate) {
+    .run(['$rootScope', '$transitions', 'AppUtilsBusiness', 'ssSideNav', '$translate', 'luRequest', '$mdDialog',
+        function ($rootScope, $transitions, AppUtilsBusiness, ssSideNav, $translate, luRequest, $mdDialog) {
+
+        var apiVersion = null;
+
+        function apiVersionChanged(oldVersion, newVersion) {
+            $mdDialog.show(
+                $mdDialog.alert()
+                    .title(AppUtilsBusiness.tr('common.updateDetected.title'))
+                    .textContent(AppUtilsBusiness.tr('common.updateDetected.text', {oldVersion: oldVersion, newVersion: newVersion}))
+                    .ok(AppUtilsBusiness.tr('common.ok')));
+        }
+
+        luRequest.addHook('resolve', function(url, method, dataGet, dataPost, luBusyGroups, data)
+        {
+            if (apiVersion == null) {
+                apiVersion = data.version;
+            }
+            else if (data.version != null && data.version != apiVersion) {
+                apiVersionChanged(apiVersion, data.version);
+                apiVersion = data.version;
+            }
+        });
+
+        luRequest.addHook('reject', function(url, method, dataGet, dataPost, luBusyGroups, error)
+        {
+            if (apiVersion == null) {
+                apiVersion = error.data.version;
+            }
+            else if (error.data.version != null && error.data.version != apiVersion) {
+                apiVersionChanged(apiVersion, error.data.version);
+                apiVersion = error.data.version;
+            }
+        });
+
         $translate('common.appName').then(function() {
             for (var i = 0; i < ssSideNav.sections.length; ++i) {
                 var a = ssSideNav.sections[i];
@@ -171,6 +205,7 @@ angular.module('app', [
         }, function (error) {
             console.error(error);
         });
+
         $transitions.onEnter({}, function($transitions)
         {
             var toState = $transitions.$to();

app/translations/en.json

@@ -13,6 +13,7 @@
     "submit": "Submit",
     "menu": "Menu",
     "cancel": "Cancel",
+    "ok": "OK",
     "confirmDelete": "Confirm deletion",
     "pagination": {
       "of": "of",
@@ -20,7 +21,11 @@
       "rowsPerPage": "Items per page:"
     },
     "createdBy": "Created with ❤ by",
-    "busyLoading": "Loading..."
+    "busyLoading": "Loading...",
+    "updateDetected": {
+      "title": "Update detected",
+      "text": "The server has been updated from version {oldVersion} to {newVersion}.\nPlease perform a full refresh by pressing Ctrl+F5 to load the new version.\nNot doing it may leads to undefined behaviors."
+    }
   },
   "home": {
     "name": "Home",