MUMUP-2671 : Change up bootstrap of angular (#510)

* change out the way we do login

* make it work exactly the way login works now

* cleanup error catching

* cleanup statement that was not needed

angularjs-portal-home/src/main/webapp/main.js

@@ -0,0 +1,65 @@
+'use strict';
+require(['./config'], function(config) {
+
+    require.config(config);
+
+    require(['angular', 'jquery', 'my-app'], function(angular, $) {
+      //attempting to replicate what they did in
+      //https://blog.mariusschulz.com/2014/10/22/asynchronously-bootstrapping-angularjs-applications-with-server-side-data
+      doLogin().then(bootstrapApplication)
+       .catch(function(){
+         $('#loading-splash').html('<b style="padding: 10px;">An error has occured during loading, please try refreshing the page. If the issue persists please contact the helpdesk.</b>');
+         console.error("Issue logging in.");
+       });
+
+      //Bootstrap the application like normal now
+      function bootstrapApplication(){
+        angular.bootstrap(document, ['my-app']);
+      }
+
+      //Checks if the last login is still valid (4 hour timeout)
+      function lastLoginValid($sessionStorage) {
+        var timeLapseBetweenLogins = 14400000;
+        if($sessionStorage.portal && $sessionStorage.portal.lastAccessed) {
+          var now = (new Date()).getTime();
+          if(now - $sessionStorage.portal.lastAccessed <= timeLapseBetweenLogins) {//4 hours
+            return true;
+          }
+        }
+        return false;
+      };
+
+      //Do the login
+      function doLogin() {
+        //init stuff
+        var initInjector = angular.injector(["ng", "ngStorage"]);
+        var $sessionStorage = initInjector.get("$sessionStorage");
+        var $rootScope = initInjector.get('$rootScope');
+
+        //login stuff
+        if(!lastLoginValid($sessionStorage)) {
+          //assume not valid, go get a username and bootstrap the user
+          var $http = initInjector.get("$http");
+          return $http.get("/portal/Login?silent=true&profile=bucky").then(function(response){
+            if("success" === response.data.status) {
+              //store some meta data for caching reason
+              if(!$sessionStorage.portal){
+                $sessionStorage.portal = {};
+              }
+              $sessionStorage.portal.lastAccessed = (new Date).getTime();
+              $sessionStorage.portal.username = response.data.username;
+              if (response.data.username === 'guest') {
+                $rootScope.GuestMode = true;
+              }
+
+            }
+          });
+        } else {
+          //the cache is still valid with a valid session, carry on
+          var $q = initInjector.get('$q');
+          return $q.resolve("Login cache still valid from previous login");
+        }
+      }
+    });
+
+});