// 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="'+i+'-star rating!">'+i+'</a></div>';
			 container.append(div);

        }
 
		

	}
	
	var stars = jQuery(container).children('.star');
    var cancel = jQuery(container).children('.cancel');
	var readOnly = jQuery(container).attr('readonly');
	var keyField = jQuery(container).attr('key');
	if ( jQuery(container).attr('rating') )
		settings.curvalue = jQuery(container).attr('rating');

	if ( !readOnly )
	{
		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 + "/" + keyField, {
					"key": keyField,
					"rating": jQuery(this).children('a')[0].href.split('#')[1] 
				}, function() { event.thanks(); stars.unbind('click'); stars.click(function() { alert('Thanks, but you already rated this!');} )});
				return false;
			}
			else if(settings.maxvalue == 1){
				settings.curvalue = (settings.curvalue == 0) ? 1 : 0;
				$(this).toggleClass('on');
				jQuery.post(container.url + "/" + keyField, {
					"key": keyField,
					"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;
			});
		}
	} // end if readOnly
        
	var event = {
		fill: function(el){ // fill to the current mouse position.
			var index = stars.index(el) + 1;

			$(container).children('.star:lt('+index+')').addClass('hover');
		},
		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.
			$(container).children('.star:lt(' + settings.curvalue +')').addClass('on');
		},

		thanks: function() {
			$(container).append("<div class='ratingMessage'>Thank you!</div>");
			setTimeout('$(".ratingMessage").fadeOut("slow");', 2200);
		}

	}        
	event.reset();
	
	return(this);	

}