(function() {
    "use strict";

    angular.module('shared')
        .factory('teacherLoginAmbassador', ['$rootScope', dataService]);

    function dataService($rootScope) {
        var REQUIRE_LOGIN_ACTIVATED = 'requireLoginActivated';

        return {
            registerOnRequireLoginActivated: registerOnRequireLoginActivated,
            requireLogin: requireLogin
        };

        function registerOnRequireLoginActivated(scope, callback) {
            var eventListenerDestructor = $rootScope.$on(REQUIRE_LOGIN_ACTIVATED, callback);
            scope.$on('$destroy', eventListenerDestructor);
        }

        function requireLogin(args) {
            $rootScope.$emit(REQUIRE_LOGIN_ACTIVATED, args);
        }
    }
})();