Improve this AngularJS factory to use with socket.io

Question

I want to use socket.io in AngularJS. I found the following factory:

app.factory(\'socket\', function ($rootScope) {
    var socket = io.connect();
    retur         


        

Answer 1

Expanding on Brandon's answer above, I've created a service that should additionally 1) strip angular tags like .$$hashKey that gets left on elements, and 2) allows for namespaced sockets like socketsof('..').on('..'

(function (window, app, undefined) {
    'use strict';


    var ScopedSocket = function (socket, $rootScope) {
        this.socket = socket;
        this.$rootScope = $rootScope;
        this.listeners = [];
        this.childSockets = [];
    };

    ScopedSocket.prototype.removeAllListeners = function () {
        var i;

        for (i = 0; i < this.listeners.length; i++) {
            var details = this.listeners[i];
            this.socket.removeListener(details.event, details.fn);
        }

        for (i = 0; i < this.childSockets.length; i++) {
            this.childSockets[i].removeAllListeners();
        }
    };

    ScopedSocket.prototype.on = function (event, callback) {
        var socket = this.socket;
        var $rootScope = this.$rootScope;

        this.listeners.push({event: event, fn: callback});

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

    ScopedSocket.prototype.emit = function (event, data, callback) {
        var socket = this.socket;
        var $rootScope = this.$rootScope;

        socket.emit(event, angular.fromJson(angular.toJson(data)), function () {
            var args = arguments;
            $rootScope.$apply(function () {
                if (callback) {
                    callback.apply(socket, args);
                }
            });
        });
    };

    ScopedSocket.prototype.of = function (channel) {
        var childSocket = new ScopedSocket(this.socket.of(channel), this.$rootScope);

        this.childSockets.push(childSocket);

        return childSocket;
    };


    app.factory('Socket', ['$rootScope', function ($rootScope) {
        var socket = $rootScope.socket;

        return function(scope) {
            var scopedSocket = new ScopedSocket(socket, $rootScope);
            scope.$on('$destroy', function() {
                scopedSocket.removeAllListeners();
            });
            return scopedSocket;
        };
    }]);
})(window, window.app);