// 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
	

************************************************/

function init_rating(inClassID, inDivCharactersToIgnore, updateDivID, updateDivValue, inURL, MaxValue, Increment)
{
    var ratings = document.getElementsByTagName('div');
    for (var i = 0; i < ratings.length; i++)
    {
        if (ratings[i].className != inClassID)
            continue;
            
        var rating = ratings[i].firstChild.nodeValue;

		var widgetId = ratings[i].getAttribute('id');
        var itemId = ratings[i].getAttribute('id').substr(inDivCharactersToIgnore);

//		alert(widgetId + ' : ' + rating);

		$('#' + widgetId).rating(inURL, {itemid: itemId, maxvalue:MaxValue, curvalue:rating,increment:Increment, updatediv: updateDivID+itemId, updatedivvalue: updateDivValue, defaultupdatedivvalue: ''});
    }
}

jQuery.fn.rating = function(url, options) {
	
	if(url == null) return;
	
	var updateAllowed=true;
	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
    itemid      :0,  // database id of item
    updatediv   : '',   // Div to add the results to. If passed value is '', then no update is performed
    updatedivvalue  : '', // The result to add to the updateDiv. If the value of this is 'inline' then use the response from the server
    defaultupdatedivvalue  : '' // The default HTML to display in the updatedDiv
  };

    var visualFeedback=new Array();
    visualFeedback[0] = 'Poor';
    visualFeedback[1] = 'Nothing special';
    visualFeedback[2] = 'Worth looking at';
    visualFeedback[3] = 'Pretty cool';
    visualFeedback[4] = 'Awesome!';
	
  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;
  settings.itemid = options.itemid;
  settings.updatediv = options.updatediv;
  settings.updatedivvalue = options.updatedivvalue;
  settings.defaultupdatedivvalue = options.defaultupdatedivvalue;

    document.getElementById(settings.updatediv).innerHTML = settings.defaultupdatedivvalue;
  
  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');
    var cancel = jQuery(container).children('.cancel');
	
    stars
        .mouseover(function(){
            if (updateAllowed==true) {
              event.drain();
              event.fill(this);
            }
        })
        .mouseout(function(){
            if (updateAllowed==true) {
              event.drain();
              event.reset();
            }
        })
        .focus(function(){
            if (updateAllowed==true) {
              event.drain();
              event.fill(this);
            }
        })
        .blur(function(){
            if (updateAllowed==true) {
              event.drain();
              event.reset();
            }
        });

    stars.click(function(){
        if (updateAllowed==true) {
            if(settings.cancel == true){
                settings.curvalue = (stars.index(this) * settings.increment) + settings.increment;

                event.sendData(container.url, settings.itemid, jQuery(this).children('a')[0].href.split('#')[1], settings.updatediv, settings.updatedivvalue);
                
    //            alert(container.url + '  ' + settings.itemid + '  ' + jQuery(this).children('a')[0].href.split('#')[1] );
                return false;

            } else if (settings.maxvalue == 1) {
                settings.curvalue = (settings.curvalue == 0) ? 1 : 0;

                $(this).toggleClass('on');

                event.sendData(container.url, settings.itemid, jQuery(this).children('a')[0].href.split('#')[1], settings.updatediv, settings.updatedivvalue);

                return false;
            }
        }
        return true;
    });

  // cancel button events
	if(cancel){
    cancel
    .mouseover(function(){
        if (updateAllowed==true) {
          event.drain();
          jQuery(this).addClass('on');
        }
    })
    .mouseout(function(){
        if (updateAllowed==true) {
          event.reset();
          jQuery(this).removeClass('on');
        }
    })
    .focus(function(){
        if (updateAllowed==true) {
          event.drain();
          jQuery(this).addClass('on');
        }
    })
    .blur(function(){
        if (updateAllowed==true) {
          event.reset();
          jQuery(this).removeClass('on');
        }
    });
      
    // click events.
    cancel.click(function(){
        if (updateAllowed==true) {
            event.drain();
            settings.curvalue = 0;
            sendData(container.url, settings.itemid, settings.curvalue, settings.updatediv, settings.updatedivvalue);
        }
      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();

          document.getElementById(settings.updatediv).innerHTML = visualFeedback[index-1];

		},
		drain: function() { // drain all the stars.
			stars
				.filter('.on').removeClass('on').end()
				.filter('.hover').removeClass('hover').end();
            document.getElementById(settings.updatediv).innerHTML = '';
		},
		reset: function(){ // Reset the stars to the default index.
            stars.slice(0,settings.curvalue / settings.increment).addClass('on').end();
            document.getElementById(settings.updatediv).innerHTML = '';
		},
        sendData: function (url, itemid, itemvalue, updatediv, updatedivvalue) {
            jQuery.get(url, {
                "itemid": itemid,
                "value": itemvalue
            },function(data){
                // If the user has passed in a target div to disply updates from the server
                if (updatediv != '') {
                    if (updatedivvalue == 'inline') {
                        // If the display data is the word 'inline' then pass thru whatever the server responded with
                        document.getElementById(updatediv).innerHTML = data;
                    } else {
                        // If the display data is NOT word 'inline' then display whatever the user passed into the routine
                        document.getElementById(updatediv).innerHTML = updatedivvalue;
                    }
                }

                // we now need to de-active the rating to prevent multiple ratings
                updateAllowed=false;
            });
        }
	};    
	event.reset();
	
	return(this);	

};