(function () {

    "use strict";

    angular
        .module("app.models")
        .service("appModels.eventEmitterService", EventEmitter);

    function EventEmitter() {
        return {
            EventEmitter: EventEmitterModel
        };
        function EventEmitterModel() {
            this.events = {};
            this.subscribe = function (eventName, fn) {
                if (!this.events[eventName]) {
                    this.events[eventName] = [];
                }

                this.events[eventName].push(fn);

                return function(){
                    this.events[eventName] = this.events[eventName].filter(function(eventFn){return fn !== eventFn});
                }.bind(this);
            };
            this.emit = function (eventName, data) {
                var event = this.events[eventName];
                if (event) {
                    event.forEach(function(fn){
                        fn.call(null, data);
                    }.bind(this));
                }
            };
        }
    }

})();