// 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
		statusfield	: null, // field to echo status to
		statuses	: null, // custom statuses
	       userfield 	: null, // extra data that can be send
    		blocked	: 0  // you can block voting
  };
	
	if(options) {
    		jQuery.extend(settings, options);
  	};
  	jQuery.extend(settings, {cancel: (settings.maxvalue > 1) ? true : false});
   
	var rateddone	= false;
   	var container = jQuery(this);

   	var theStatuses = ((settings.statuses != null) ? settings.statuses : new Array("poor", 
													"nothing special", 
													"worth viewing", 
													"pretty cool", 
													"awesome",
													"please rate",
													"thanks for rating",
													"already rated"));
 
   
	if ( settings.blocked == 1 ) {
		$(settings.statusfield).attr("innerHTML", theStatuses[theStatuses.length-1]);
	}

	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.append(div);
      			}*/
    		} else {
			var $div = $('<div class="star"></div>')
        		.append('<a href="#'+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 userdata = ((settings.userfield != null) ? $(settings.userfield).attr("innerHTML") : "");
	var stars = jQuery(container).children('.star');
  	/*var cancel = jQuery(container).children('.cancel');*/
	
  stars
    .mouseover(function(){
	if ( settings.blocked == 0 ){
		event.drain();
      		event.fill(this);

		var index = (stars.index(this) * settings.increment) + settings.increment-1;
		$(settings.statusfield).attr("innerHTML", theStatuses[index]);
	}
	else if ( !rateddone ) {
		$(settings.statusfield).attr("innerHTML", theStatuses[theStatuses.length-1]);
	}
    })
    .mouseout(function(){
	if ( settings.blocked == 0 ){
      		event.drain();
      		event.reset();

		var index = (stars.index(this) * settings.increment) + settings.increment-1;
		$(settings.statusfield).attr("innerHTML", theStatuses[theStatuses.length-3]);
	}
	else if ( !rateddone ) {
		$(settings.statusfield).attr("innerHTML", theStatuses[theStatuses.length-1]);
	}
    })
    .focus(function(){
	if ( settings.blocked == 0 ){
      		event.drain();
      		event.fill(this);
	}
    })
    .blur(function(){
	if ( settings.blocked == 0 ){
      		event.drain();
      		event.reset();
	}
    });

  stars.click(function(){
	if ( settings.blocked == 0 ){
		settings.blocked = 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],
	 		"data"  : userdata
      		});
		
		rateddone = true;
		$(settings.statusfield).attr("innerHTML", theStatuses[theStatuses.length-2]);
		event.drain();
      		event.reset();

		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],
	 			"data"  : userdata
      			});

			rateddone = true;
			$(settings.statusfield).attr("innerHTML", theStatuses[theStatuses.length-2]);
			event.drain();
      			event.reset();

			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],
	 "data"  : userdata
      });
      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()
				.lt(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.lt(settings.curvalue / settings.increment).addClass('on').end();
		}
	}        
	event.reset();
	
	return(this);	

}