// 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
    disable   : false,
    cancel    : false,
    votato    : false
  };
	
  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');
    stars.children('a').addClass("disabled")
    
    var cancel = jQuery(container).children('.cancel');
    if (!settings.disable)
    {
      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.disable)
          {
                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] });
                    return false;
                }
                else// if (settings.maxvalue == 1)
                {
                    if (!settings.votato)
                    {
                       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){settings.votato=true;settings.curvalue=data;event.reset();stars.children('a').addClass("disabled");});
                       
                       return false;
                    }

                }
                return true;
          }
          else
          {
              return false;
          }

      });

  // 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;
    });
  }

    if ((!settings.disable)&&(!settings.votato))
    {
        var event = {
            fill: function(el){ // fill to the current mouse position.
               if (!settings.votato)
                 {
                    var index = stars.index(el) + 1;
                    stars
                        .children('a').css('width', '100%').end()
                        .slice(0,index).addClass('hover').end();
                 }
                 else
                 {
                   stars.slice(0,settings.curvalue / settings.increment).addClass('on').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();
    }
    else
    {
        var event = {
            reset: function(){ // Reset the stars to the default index.
                    stars.slice(0,settings.curvalue / settings.increment).addClass('on').end();
            }
        };
        event.reset();
    }
   
  return(this);
};