// JavaScript Document
/*************************************************
Star Rating System
First Version: 21 November, 2006
Second Version: 17 May, 2007
Third Version 09 March 2009
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
Cancel - ReadOnly - Formy Adition : Wilson Montoya
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
	cancel : false,		//show Cancel Button	
	readOnly : false,	//Only show Stars, not vote
	formy : false,		//Send Data via Form
	title : ''			//Add title to <a> tag
  };
	
  if(options) {
    jQuery.extend(settings, options);
  };
  //jQuery.extend(settings, {cancel: (settings.maxvalue > 1) ? true : false});
  //jQuery.extend(settings, {cancel: 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 {
      	if( settings.readOnly )
				a_content = '<a>'+i+'</a>';
		  	else
				a_content = '<a id="'+i+'" title="'+settings.title+i+'">'+i+'</a>';
	
		var $div = $('<div class="star"></div>').append(a_content).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( settings.readOnly) {
	$(this).addClass('star_readonly');
 }
  else {
    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.maxvalue > 1 ){
			settings.curvalue = jQuery(this).children('a')[0].id;
			event.reset();
			event.send(this);
		} 
		else if (settings.maxvalue == 1) {
			settings.curvalue = (settings.curvalue == 0) ? 1 : 0;
			$(this).toggleClass('star_on');
			event.send(this);
		}
		return false;
	});
	
	// cancel button events
	if(cancel){
    cancel
    .mouseover(function(){
      event.drain();
      jQuery(this).addClass('star_on');
    })
    .mouseout(function(){
      event.reset();
      jQuery(this).removeClass('star_on');
    })
    .focus(function(){
      event.drain();
      jQuery(this).addClass('star_on');
    })
    .blur(function(){
      event.reset();
      jQuery(this).removeClass('star_on');
    });
      
    // click events.
    cancel.click(function(){
      event.drain();
      settings.curvalue = 0;
      event.send(this);
	  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('star_hover').end();
		},
		drain: function() { // drain all the stars.
			stars
				.filter('.star_on').removeClass('star_on').end()
				.filter('.star_hover').removeClass('star_hover').end();
		},
		reset: function(){ // Reset the stars to the default index.
			stars.slice(0,settings.curvalue / settings.increment).addClass('star_on').end();
		},
		send: function(el) {
			if(settings.formy)
				$('input[type=hidden].star').attr('value',settings.curvalue);
			else
				jQuery.post(container.url, {"rating": settings.curvalue });
		}
	};
	
	event.reset();
	return(this);	

};