Simple chain for node.js

chainProcess.js

exports.chainProcess = function(){
	
	this.lastError = false;
	this.lastReturn = false;

	this.uWorker = false;

	this.chainPosition = -1;
	this.chainnedFunctions = [];
	this.chainnedCatchs = [];
	this.chainAlias = [];

	this.onError = false;

	this.execute = function(n) {
		this.chainnedFunctions[n](this.lastError, this.lastReturn);
	};
	
	this.prev = function(){
		this.chainPosition--;
		this.execute(this.chainPosition);
	};

	this.next = function(){
		this.chainPosition++;
		this.execute(this.chainPosition);			
	};

	this.end = function(){		
		this.execute(this.chainnedFunctions.length -1);
	};

	this.setEnd = function(){
		this.chainPosition = this.chainnedFunctions.length -1;
	};

	this.add = function(alias, fnc){
		this.chainnedFunctions.push(fnc);
	};	
}