/*
---

script: Loop.js

description: Runs a class method on a periodical

license: MIT-style license.

authors: Ryan Florence <http://ryanflorence.com>

docs: http://moodocs.net/rpflo/mootools-rpflo/Loop

requires:
- core:1.2.4/'*'

provides: [Loop]

...
*/

var Loop = new Class({

    loopCount: 0,
    isStopped: true,
    isLooping: false,
    loopMethod: $empty,

    setLoop: function(fn,delay){
        if(this.isLooping) {
            this.stopLoop();
            var wasLooping = true;
        } else {
            var wasLooping = false;
        }
        this.loopMethod = fn;
        this.loopDelay = delay || 3000;
        if(wasLooping) this.startLoop();
        return this;
    },

    stopLoop: function() {
        this.isStopped = true;
        this.isLooping = false;
        $clear(this.periodical);
        return this;
    },

    startLoop: function(delay) {
        if(this.isStopped){
            var delay = (delay) ? delay : this.loopDelay;
            this.isStopped = false;
            this.isLooping = true;
            this.periodical = this.looper.periodical(delay,this);
        };
        return this;
    },

    resetLoop: function(){
        this.loopCount = 0;
        return this;
    },

    looper: function(){
        this.loopCount++;
        this.loopMethod(this.loopCount);
        return this;
    }

});