// 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, id) {
	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');
	
	if(options.isset != true){
  		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;
			var self = (jQuery(this))
      		jQuery.post(container.url, {
        		"rating": jQuery(this).children('a')[0].href.split('#')[1],
				"updatefield":$(this).parent().parent().attr('id'),
				"rating_avg":jQuery(this).children('a')[0].href.split('#')[1],
				"id":id
      			}, 
				function(data){
					if(data != "false"){
						var elem = self.parent().parent().find('span');
						var cRating = elem.html();
						elem.html(Number(cRating)+1);
					}
				});
			return false;	
  		});
	}else{
		stars.children('a').addClass("star-off");
	}
  // 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);	

};