Angular service for socket.io

angular-socket-io-factory.js

app.factory('socket', function ($rootScope) {
    var socket = io.connect();
    return {
        on: function(event, callback) {
            socket.on(event, function () {  
                var args = arguments;
                $rootScope.$apply(function () {
                    callback.apply(socket, args);
                });
            });
        },
        emit: function(event, data, callback) {
            socket.emit(event, data, function () {
                var args = arguments;
                $rootScope.$apply(function () {
                    if(callback) {
                        callback.apply(socket, args);
                    }
                });
            })
        }
    };
});