JS Task Function Manager

'use strict';

var TaskManager = TaskManagerPackage();

var userId = 1;

// Get TaskManager Environment By UserID
// And created task with some calculations
TaskManager(userId).addTask(function(){

    var self = this; // save link to Task instance

    this.trigger('test', {hello: 'hello world!'}); // trigger test event

    self.done(); // call task done

}).settings(function(){

    this.some = 'var';

}).on('done', function(){

    console.log('completed', this.some); // completed var

}).on('test',function(context){

    console.log(context.hello); // hello world!

}).start();

// hello world!
// completed var

function TaskManagerPackage(){

    var instance = {};
    var tasks = [];

    function TaskEnvirovment(uid){

        function Task(__function){

            var events = {};

            var users = [];

            this.index = -1;

            this.name = '';

            this.removed = false;

            this.getSubscribers = function(){
                return users;
            };

            this.remove = function(){

                if(this.index > -1){

                    tasks.splice(this.index, 1);

                }

                this.removed = true;

            };

            this.settings = function(__c){
                var c = __c || function(){};

                c.call(this);

                return this;
            };

            this.subscribe = function(uid){

                var self = this;

                if(uid.constructor === Array){

                    for(var i = 0; i < uid.length; i++){

                        if(typeof uid[i] == 'number'){

                            self.subscribe(uid[i]);

                        }

                    }

                }else if(typeof uid == 'number' && users.indexOf(uid) < 0){

                    users.push(uid);

                }

                return this;
            };

            this.unsubscribe = function(uid){

                var self = this;

                if(uid.constructor === Array){

                    for(var i = 0; i < uid.length; i++){

                        if(typeof uid[i] == 'number'){

                            self.unsubscribe(uid[i]);

                        }

                    }

                }else if(typeof uid == 'number'){

                    var index = users.indexOf(uid);

                    if(users.indexOf(uid) > -1){
                        users.splice(index, 1);
                    }

                }

                return this;
            };

            this.done = function(){
                this.trigger('done');
            };

            this.trigger = function(name, __context){

                var self = this;

                var context = __context || {};

                if(events.hasOwnProperty(name)){

                    events[name].forEach(function(c){

                        c.call(self, context);

                    });

                }

                return this;
            };

            this.on = function(name, __c){
                var c = __c || function(){};

                if(!events.hasOwnProperty(name)){
                    events[name] = [];
                }

                if(typeof c == 'function'){
                    events[name].push(c);
                }

                return this;
            };

            this.start = function(){
                __function.call(this);
            };

        }

        this.uid = uid;

        this.count = 0;

        this.taskIdSubscribes = [];

        this.addTask = function(__function){

            var task = new Task(__function);

            var l = tasks.push(task);

            var index = l - 1;

            task.index = index;

            this.taskIdSubscribes.push(index);

            return tasks[index];

        }

    }

    return function(uid){

        if(!instance.hasOwnProperty(uid)){
            instance[uid] = new TaskEnvirovment(uid);
        }

        return instance[uid];

    };

}