Mediator: Object grouping and brokering

Mediator.js

/*
Script: Mediator
	Object grouping and brokering

Copyright and License:
	Copyright 2010, Mark Obcena. MIT-Style License

*/

(function(){

this.Mediator = new Type('Mediator', function(){
	this.$collected = [];
	this.$chain = [];
	if (arguments.length){
		this.$collected.concat(Array.prototype.slice(arguments));
	}
});

var start = function(fn, args){
	var obj = this.$collected.shift();
	fn.apply(obj, args);
	this.push(obj);
};

Mediator.implement({

	push: function(obj){
		this.$collected.push(obj);
		if (this.$chain.length){
			var fn = this.$chain.shift();
			start.call(this, fn.fn, fn.args);
		}
		return this;
	},

	shift: function(){
		return this.$collected.shift();
	},

	call: function(fn, args){
		if (!this.$collected.length) this.$chain.push({fn: fn, args: args});
		else start.call(this, fn, args);
		return this;
	}

});

})();