// 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);
	};
	jQuery.extend(settings, {cancel: (settings.maxvalue > 1) ? true : false});
	
	
	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) {
		if(settings.cancel == true){
		var div = '<div class="cancel"><a href="#0" title="Cancel Rating">Cancel Rating</a></div>';
		container.empty().append(div);
		}
	} else {
		var $div = $('<div class="star"></div>')
		.append('<a href="#'+i+'" title="Give it '+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');
	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) * settings.increment) + settings.increment;
		jQuery.post(container.url, {
			"rating": jQuery(this).children('a')[0].href.split('#')[1] 
		},
		function(data){
		    jQuery.fn.mntTexto(data);
		});
		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] 
			},
			function(data){
			    jQuery.fn.mntTexto(data);
			});
			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 / settings.increment).addClass('on').end();
		}
	};	
	event.reset();
	
	return(this);	

};