// 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)
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>')
        .append('<a href="#'+i+'" title="'+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(){
		$("#CommentRate").attr('value', jQuery(this).children('a')[0].href.split('#')[1]);
		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 (result) { updateRating(result); }
			);
			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 (result) { updateRating(result); }
			);
			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);	
};