// JavaScript Document
/*************************************************
Star Rating System
First Version: 21 November, 2006
Author: Ritesh Agrawal
Inspriation: Will Stuckey's star rating system (http://sandbox.wilstuckey.com/jquery-ratings/)
Demonstration: http://php.scripts.psu.edu/rja171/widgets/rating.php
Usage: $('#rating').rating('www.url.to.post.com', {maxvalue:5, curvalue:0});

arguments
url : required -- post changes to 
options
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 
		maxvalue: 5,   // max number of stars
		curvalue: 0    // number of selected stars
	};

	if (options) {
		jQuery.extend(settings, options);
	};
	jQuery.extend(settings, { cancel: (settings.maxvalue > 1) ? true : false });


	var container = jQuery(this);

	jQuery.extend(container, {
		averageRating: settings.curvalue,
		url: settings.url
	});

	for (var i = 0; i <= settings.maxvalue; i++) {
		var size = i
		if (i == 0) {
			if (settings.cancel == true) {
				var div = '<div class="cancel"><a href="#0" title="Cancel Rating">Cancel Rating</a></div>';
				container.append(div);
			}
		}
		else {
			var div = '<div class="star"><a href="#' + i + '" title="Give it ' + i + '/' + size + '">' + i + '</a></div>';
			container.append(div);

		}
	}

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

	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() {
		if (settings.cancel == true) {
			settings.curvalue = stars.index(this) + 1;
			jQuery.post(container.url, {
				"rating": jQuery(this).children('a')[0].href.split('#')[1]
			});
			return false;
		}
		else if (settings.maxvalue == 1) {
			settings.curvalue = (settings.curvalue == 0) ? 1 : 0;
			$(this).toggleClass('on');
			jQuery.post(container.url, {
				"rating": jQuery(this).children('a')[0].href.split('#')[1]
			});
			return false;
		}
		return true;

	});

	// cancel button events
	if (cancel) {
		cancel
            .mouseover(function() {
			event.drain();
			jQuery(this).addClass('on')
		})
            .mouseout(function() {
			event.reset();
			jQuery(this).removeClass('on')
		})
            .focus(function() {
			event.drain();
			jQuery(this).addClass('on')
		})
            .blur(function() {
			event.reset();
			jQuery(this).removeClass('on')
		});

		// click events.
		cancel.click(function() {
			event.drain();
			settings.curvalue = 0;
			jQuery.post(container.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).addClass('on').end();
		}
	}
	event.reset();

	return (this);

}