I wish to load first service then controller in angular js. But when it first time load the variable of service is empty. Here is my Service code
app.service('Auth', function($http, $rootScope, $cookies, $sessionStorage, $location, dataFactory) {
    var auth = {};
    $sessionStorage.logincheck1 = 0;
    auth.is_login_sim_v2 = function() {
        if ($sessionStorage.logincheck1 == 0) {
            var a = document.cookie.substr(10);
            var a1 = a.split(";");
            dataFactory.post_api('users/loginchecking', {
                'session_id': a1[0]
            }).then(function(resultChech) {
                //console.log(resultChech);
                $sessionStorage.logincheck1 = 1;
                $sessionStorage.edgar_id = resultChech.checking_id;
                $rootScope.$broadcast('Auth:isLoginSuccess');
                //console.log($sessionStorage.edgar_id);
                if ($sessionStorage.edgar_id === undefined) {
                    console.log('1');
                    return false;
                } else if ($sessionStorage.edgar_id == 'undefined') {
                    console.log('2');
                    return false;
                } else if ($sessionStorage.edgar_id == '') {
                    console.log('3');
                    return false;
                } else {
                    console.log('4');
                    return $sessionStorage.edgar_id;
                }
            });
        } else if ($sessionStorage.logincheck1 == 1) {
            //console.log(document.cookie.substr(10));
            if ($sessionStorage.edgar_id === undefined) {
                return false;
            } else if ($sessionStorage.edgar_id == '') {
                return false;
            } else {
                return $sessionStorage.edgar_id;
            }
        }
    }
})
And Here is my controller code:
$scope.$on('Auth:isLoginSuccess', function() {
    // calculation based on service value
    console.log(Auth.is_login_sim_v2());
    console.log($sessionStorage.edgar_id);
    if (Auth.is_login_sim_v2() == false) {
        $scope.isLoggedIn=false;
    } else if(Auth.is_login_sim_v2() === undefined){
        $scope.isLoggedIn=false;
    } else{
        $scope.isLoggedIn=true;
    }
})
 
     
    