Attaching global functions and data to $rootScope on initialization in AngularJS

Question

Attaching global functions and data to $rootScope on initialization in AngularJS

I'd like to have a "Global function" called the first time I launch my AngularJS application, or every time I refresh the page.

This function will call my server with $http.get() to get global information necessary to use my application. I need to access $rootScope in this function. After that, and only after this request finished, I'm using app.config and $routeProvider.when() to load the good controller.

app.config(['$routeProvider', function($routeProvider) {
    $routeProvider
        .when('/', 
        {
            /**/
        });
}]);

I don't want the application do something before this action is finished. So I guess I have to use a "resolve", but I don't really know how to use it.

Any idea?

Thanks!

javascript
angularjs

Answer 1

It's not the best way to solve your given problem, but here is a proposed solution for your question.

Anything inside run(...) will be run on initialization.

angular.module('fooApp').run(['$http', '$rootScope' function($http, $rootScope) {
 $http.get(...).success(function(response) {
     $rootScope.somedata = response;
 });

 $rootScope.globalFn = function() {
   alert('This function is available in all scopes, and views');
 }

}]);

Now an alert can be triggered in all your views, using ng-click="globalFn()".

Be aware that directives using a new isolate scope will not have access to this data if not explicitly inherited: $scope.inheritedGlobalFn = $rootScope.globalFn

Answer 2

As a first step for your solution, I think that you could monitor the $routeChangeStart event that is triggered before every route change (or page refresh in your case).

var app = angular.module('myApp').run(['$rootScope', function($rootScope) {
    $rootScope.$on("$routeChangeStart", function (event, next, current) {
        if (!$rootScope.myBooleanProperty)) {
            $location.path('/');
        }
        else {
            $location.path('/page');
        }
    });
});

You should have a look at this article about Authentification in a Single Page App. I think you could work something similar.

Answer 3

Please consider this answer: http://stackoverflow.com/a/27050497/1056679

I've tried to collect all possible methods of resolving dependencies in global scope before actual controllers are executed.