// JavaScript Document
/*************************************************
Star Rating System
First Version: 21 November, 2006
Second Version: 17 May, 2007
Author: Ritesh Agrawal (http://php.scripts.psu.edu/rja171/widgets/rating.php)
				email: ragrawal [at] gmail (dot) com
Inspiration: Will Stuckey's star rating system (http://sandbox.wilstuckey.com/jquery-ratings/)
Half-Star Addition: Karl Swedberg
Demonstration: http://examples.learningjquery.com/rating/
Usage: $('#rating').rating('url-to-post.php', {maxvalue:5, curvalue:0});

arguments
url : required -- post changes to
options
	increment : 1, // value to increment by
	maxvalue: number of stars
	curvalue: number of selected stars


************************************************/

jQuery.fn.rating = function(url, options) {

	if(url == null) return;

	var settings = {
		url : url, // post changes to
		increment : 1, // value to increment by
		maxvalue	: 5,	 // max number of stars
		curvalue	: 0		// number of selected stars
	};

	if(options) {
		jQuery.extend(settings, options);
	};

	var container = jQuery(this);

	jQuery.extend(container, {
		averageRating: settings.curvalue,
		url: settings.url
	});
	settings.increment = (settings.increment < .75) ? .5 : 1;
	var s = 0;
	for(var i= 0; i <= settings.maxvalue ; i++){
		if (i == 0) {
		} else {
			var $div = $('<div class="star"></div>')
				.append('<a href="#'+i+'" title="Gib ihm '+i+'/'+settings.maxvalue+'">'+i+'</a>')
				.appendTo(container);
			if (settings.increment == .5) {
				if (s%2) {
					$div.addClass('star-left');
				} else {
					$div.addClass('star-right');
				}
			}
		}
		i=i-1+settings.increment;
		s++;
	}

	var stars = jQuery(container).children('.star');

	stars
		.mouseover(function(){
			event.drain();
			event.fill(this);
		})
		.mouseout(function(){
			event.drain();
			event.reset();
		})
		.focus(function(){
			event.drain();
			event.fill(this);
		})
		.blur(function(){
			event.drain();
			event.reset();
		});

	stars.click(function(){
		settings.curvalue = (stars.index(this) * settings.increment) + settings.increment;
		$.post(url, {
			"rating": jQuery(this).children('a')[0].href.split('#')[1]
		});
		return false;
	});

	var event = {
		fill: function(el){ // fill to the current mouse position.
			var index = stars.index(el) + 1;
			stars
				.children('a').css('width', '100%').end()
				.slice(0,index).addClass('hover').end();
		},
		drain: function() { // drain all the stars.
			stars
				.filter('.on').removeClass('on').end()
				.filter('.hover').removeClass('hover').end();
		},
		reset: function(){ // Reset the stars to the default index.
			stars.slice(0,settings.curvalue / settings.increment).addClass('on').end();
		}
	};
	event.reset();

	return(this);

};