/**
 * 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: 2009/10/16
 *
 * @author Blair Mitchelmore
 * @version 1.2
 *
 **/

jQuery.fn.extend({
  everyTime: function(interval, label, fn, times) {
    return this.each(function() {
      jQuery.timer.add(this, interval, label, fn, times);
    });
  },
  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: {
    global: [],
    guid: 1,
    dataKey: "jQuery.timer",
    regex: /^([0-9]+(?:\.[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 = parseFloat(result[1]);
        var mult = this.powers[result[2]] || 1;
        return num * mult;
      } else {
        return value;
      }
    },
    add: function(element, interval, label, fn, times) {
      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 (typeof times != 'number' || isNaN(times) || times < 0) 
        times = 0;
      
      times = times || 0;
      
      var timers = jQuery.data(element, this.dataKey) || jQuery.data(element, this.dataKey, {});
      
      if (!timers[label])
        timers[label] = {};
      
      fn.timerID = fn.timerID || this.guid++;
      
      var handler = function() {
        if ((++counter > times && times !== 0) || fn.call(element, counter) === false)
          jQuery.timer.remove(element, label, fn);
      };
      
      handler.timerID = fn.timerID;
      
      if (!timers[label][fn.timerID])
        timers[label][fn.timerID] = window.setInterval(handler,interval);
      
      this.global.push( element );
      
    },
    remove: function(element, label, fn) {
      var timers = jQuery.data(element, this.dataKey), 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 ) 
          jQuery.removeData(element, this.dataKey);
      }
    }
  }
});

jQuery(window).bind("unload", function() {
  jQuery.each(jQuery.timer.global, function(index, item) {
    jQuery.timer.remove(item);
  });
});