//copyright 2008 Jarrett Vance
//http://jvance.com

// customized for DT, careful of updates
// added 'jQuery' wrapper
// added 'active' option

jQuery(function($){	
	
	$.fn.rater = function(options) {
	    var opts = $.extend({}, $.fn.rater.defaults, options);
	    return this.each(function() {
	        var $this = $(this);
	        var $on = $this.find('.ui-rater-starsOn');
	        var $off = $this.find('.ui-rater-starsOff');
	        opts.size = $on.height();
	        if (opts.rating == undefined) opts.rating = $on.width() / opts.size;
	        if (opts.id == undefined) opts.id = $this.attr('id');

			if (opts.active != false) {
		        $off
					.mousemove(function(e) {
			            var left = e.clientX - $off.offset().left;
			            var width = $off.width() - ($off.width() - left);
			            width = Math.ceil(width / (opts.size / opts.step)) * opts.size / opts.step;
			            $on.width(width);
			        })
					.hover(
						function(e) {
							$on.addClass('ui-rater-starsHover');
						},
						function(e) {
			            	$on.removeClass('ui-rater-starsHover');
							$on.width(opts.rating * opts.size);
						}
					)
					.click(function(e) {
			            var r = Math.round($on.width() / $off.width() * (opts.units * opts.step)) / opts.step;
			            $off.unbind('click').unbind('mousemove').unbind('mouseenter').unbind('mouseleave');
			            $off.css('cursor', 'default'); $on.css('cursor', 'default');
			            $.fn.rater.rate($this, opts, r);
			        })
					.css('cursor', 'pointer');
				$on.css('cursor', 'pointer');
			};
	    });
	};
	
	$.fn.rater.defaults = {
	    postHref: location.href,
	    units: 5,
	    step: 1,
		active: true
	};
	
	$.fn.rater.rate = function($this, opts, rating) {
	    var $on = $this.find('.ui-rater-starsOn');
	    var $off = $this.find('.ui-rater-starsOff');
	    $off.fadeTo(600, 0.4, function() {
	        $.ajax({
	            url: opts.postHref,
	            type: "POST",
	            data: 'id=' + opts.id + '&rating=' + rating,
	            complete: function(req) {
	                if (req.status == 200) { //success
	                    opts.rating = parseFloat(req.responseText);
	                    $off.fadeTo(600, 0.1, function() {
	                        $on.removeClass('ui-rater-starsHover').width(opts.rating * opts.size);
	                        var $count = $this.find('.ui-rater-rateCount');
	                        $count.text(parseInt($count.text()) + 1);
	                        $this.find('.ui-rater-rating').text(opts.rating.toFixed(1));
	                        $off.fadeTo(600, 1);
	                        $this.attr('title', 'Your rating: ' + rating.toFixed(1));
	                    });
	                } else { //failure
	                    alert(req.responseText);
	                    $on.removeClass('ui-rater-starsHover').width(opts.rating * opts.size);
	                    $this.rater(opts);
	                    $off.fadeTo(2200, 1);
	                }
	            }
	        });
	    });
	};

});