/*
---

name: Loop

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/Class

provides: [Loop]

...
*/

var Loop = new Class({

    loopCount: 0,
    isLooping: false,
    loopMethod: function () { },

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

    stopLoop: function () {
        this.isLooping = false;
        clearInterval(this.periodical);
        return this;
    },

    startLoop: function (delay, now) {
        if (!this.isLooping) {
            this.isLooping = true;
            if (now) this.looper();
            this.periodical = this.looper.periodical(delay || this.loopDelay, this);
        };
        return this;
    },

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

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

});