My favorite event mechanism in a angular app

scopeEventService.js

var scopeEventService = function() {

    var _event = {}; //visted info

    var _handler = {
        EventName1: {
          codeBlockName:function(){} //handler
        }
    };

    
    var event = function($scope, evtName, codeBlockName) {
        var e = _event[evtName];
        if (e && !e.reciever[codeBlockName]) {
            e.reciever[codeBlockName] = true;
            (_handler[evtName][codeBlockName] || noop)($scope, e.argument);
        }
    };

    var $event = function($scope, evtName, codeBlockName) {
        $scope.$on(evtName, function(evt, option) {
            (_handler[evtName][codeBlockName] || noop)($scope, option);
        });
    };


    this.add = function(evtname, codeBlockName, fun) {
        _handler[evtname] = _handler[evtname] || {};
        _handler[evtname][codeBlockName] = fun;
        return this;
    };

    this.$get = function() {
        return {
            event: event,
            $event: $event
        };
    };

    function onViewEnter($scope, fun) {
        $scope.$on('$ionicView.enter', fun);
    }

    return {
        event: event,
        $event: $event,
        onViewEnter: onViewEnter
    };

};


app.factory('scopeEventService', scopeEventService);