// 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)
        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
        fixed: 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 += settings.increment) {
        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+'" title="Bewertung: '+i+' von '+settings.maxvalue+'"></a>')
                .appendTo(container);
            if (settings.increment == .5) {
                if (s%2) {
                    $div.addClass('star-left');
                } else {
                    $div.addClass('star-right');
                }
            }
        }
        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(){
//~   	console.log('submitting... Rating: ' + jQuery(this).children('a')[0].href.split('#')[1]);
//~   	console.log('ID: ' + settings.id);
        if (!settings.fixed) {
            settings.curvalue = (stars.index(this) * settings.increment) + settings.increment;
            $.post(container.url, {
                'rate': jQuery(this).children('a')[0].href.split('#')[1],
                'id': settings.id
            });
            settings.fixed = true;
            event.reset();
        }
	    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;
        });
    }

	var event = {
		fill: function(el){ // fill to the current mouse position.
            if (!settings.fixed) {
                var index = stars.index(el) + 1;
                stars
                    .children('a').css('width', '100%').end()
                    .slice(0,index).children('a').addClass('hover').end();
            }
		},
		drain: function() { // drain all the stars.
            if (!settings.fixed) {
                stars
                    .find('a.on').removeClass('on').end()
                    .find('a.hover').removeClass('hover').end();
            }
		},
		reset: function(){ // Reset the stars to the default index.
            var cls = settings.fixed ? 'fixed' : 'on';
			stars.slice(0, settings.curvalue / settings.increment).children('a').addClass(cls).end();
            if (settings.fixed) {
                container.addClass('fixed');
                container.find('a').attr('title', 'Sie haben bereits eine Bewertung abgegeben.').end();
            }
		}
	};
	event.reset();

	return(this);
};