Basic socket usage in Angular/Ionic

SocketSvc.js

angular.module('app')

    .service('Socket', function($rootScope) {

        var socket = io.connect('http://www.foo.com:5000');

        var S = {};

        S.on = function(eventName, callback) {
            socket.on(eventName, function () {
                var args = arguments;
                $rootScope.$apply(function () {
                    callback.apply(null, args);
                });
            });
        }

        S.emit = function(eventName, data, callback) {
            socket.emit(eventName, data, function () {
                var args = arguments;
                if (callback) {
                    $rootScope.$apply(function () {
                        callback.apply(null, args);
                    });
                }
            });
        }
                
        return S;

    });