/**
 * 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);
	});
});