// 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, ufv_rating:0});

arguments
url : required -- post changes to
options
  increment : 1, // value to increment by
	maxvalue: number of stars
	ufv_rating: 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
    ufv_rating  : 0,    // number of selected stars
    ufv_type : '', //  тип
    ufv_src : '' // ИД

  };

  if(options) {
    jQuery.extend(settings, options);
  };
  jQuery.extend(settings, {cancel: (settings.maxvalue > 1) ? true : false});


  var container = jQuery(this);

	jQuery.extend(container, {
		 averageRating: settings.ufv_rating
		,url: settings.url
		,ufv_type: settings.ufv_type
		,ufv_src: settings.ufv_src
	});
  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="Мне не нравится">Мне не нравится</a></div>';
        container.empty().append(div);
      }
    } else {
      var $div = $('<div class="star"></div>')
        .append('<a href="#'+i+'" title="Рейтинг '+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.ufv_rating = (stars.index(this) * settings.increment) + settings.increment;
      jQuery.post(container.url, {
             "ufv_rating": jQuery(this).children('a')[0].href.split('#')[1]
			,"ufv_type" : container.ufv_type
			,"ufv_src" : container.ufv_src
      });
			return false;
		} else if (settings.maxvalue == 1) {
			settings.ufv_rating = (settings.ufv_rating == 0) ? 1 : 0;
			$(this).toggleClass('on');
			jQuery.post(container.url, {
				 "ufv_rating": jQuery(this).children('a')[0].href.split('#')[1]
				,"ufv_type" : container.ufv_type
				,"ufv_src" : container.ufv_src
			});
			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.ufv_rating = 0;
      jQuery.post(container.url, {
        "ufv_rating": jQuery(this).children('a')[0].href.split('#')[1]
	,"ufv_type" : container.ufv_type
	,"ufv_src" : container.ufv_src
      });
      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.ufv_rating / settings.increment).addClass('on').end();
		}
	};
	event.reset();

	return(this);

};