/**
* jQuery.timers - Timer abstractions for jQuery
* Written by Blair Mitchelmore (blair DOT mitchelmore AT gmail DOT com)
* Licensed under the WTFPL (http://sam.zoy.org/wtfpl/).
* Date: 2008/08/26
*
* @author Blair Mitchelmore
* @version 1.0.0
*
**/

jQuery.fn.extend({
  everyTime: function(interval, label, fn, times, belay) {
    return this.each(function() {
      jQuery.timer.add(this, interval, label, fn, times, belay);
    });
  },
  oneTime: function(interval, label, fn) {
    return this.each(function() {
      jQuery.timer.add(this, interval, label, fn, 1);
    });
  },
  stopTime: function(label, fn) {
    return this.each(function() {
      jQuery.timer.remove(this, label, fn);
    });
  }
});

jQuery.extend({
  timer: {
    guid: 1,
    global: {},
    regex: /^([0-9]+)\s*(.*s)?$/,
    powers: {
      // Yeah this is major overkill...
      'ms': 1,
      'cs': 10,
      'ds': 100,
      's': 1000,
      'das': 10000,
      'hs': 100000,
      'ks': 1000000
    },
    timeParse: function(value) {
      if (value == undefined || value == null)
        return null;
      var result = this.regex.exec(jQuery.trim(value.toString()));
      if (result[2]) {
        var num = parseInt(result[1], 10);
        var mult = this.powers[result[2]] || 1;
        return num * mult;
      } else {
        return value;
      }
    },
    add: function(element, interval, label, fn, times, belay) {
      var counter = 0;

      if (jQuery.isFunction(label)) {
        if (!times)
          times = fn;
        fn = label;
        label = interval;
      }

      interval = jQuery.timer.timeParse(interval);

      if (typeof interval != 'number' || isNaN(interval) || interval <= 0)
        return;

      if (times && times.constructor != Number) {
        belay = !!times;
        times = 0;
      }

      times = times || 0;
      belay = belay || false;

      if (!element.$timers)
        element.$timers = {};

      if (!element.$timers[label])
        element.$timers[label] = {};

      fn.$timerID = fn.$timerID || this.guid++;

      var handler = function() {
        if (belay && this.inProgress)
          return;
        this.inProgress = true;
        if ((++counter > times && times !== 0) || fn.call(element, counter) === false)
          jQuery.timer.remove(element, label, fn);
        this.inProgress = false;
      };

      handler.$timerID = fn.$timerID;

      if (!element.$timers[label][fn.$timerID])
        element.$timers[label][fn.$timerID] = window.setInterval(handler, interval);

      if (!this.global[label])
        this.global[label] = [];
      this.global[label].push(element);

    },
    remove: function(element, label, fn) {
      var timers = element.$timers, ret;

      if (timers) {

        if (!label) {
          for (label in timers)
            this.remove(element, label, fn);
        } else if (timers[label]) {
          if (fn) {
            if (fn.$timerID) {
              window.clearInterval(timers[label][fn.$timerID]);
              delete timers[label][fn.$timerID];
            }
          } else {
            for (var fn in timers[label]) {
              window.clearInterval(timers[label][fn]);
              delete timers[label][fn];
            }
          }

          for (ret in timers[label]) break;
          if (!ret) {
            ret = null;
            delete timers[label];
          }
        }

        for (ret in timers) break;
        if (!ret)
          element.$timers = null;
      }
    }
  }
});

if (jQuery.browser.msie)
  jQuery(window).one("unload", function() {
    var global = jQuery.timer.global;
    for (var label in global) {
      var els = global[label], i = els.length;
      while (--i)
        jQuery.timer.remove(els[i], label);
    }
  });