// 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
Trivity Addtions: iCUBE Network Solutions
Demonstration: http://examples.learningjquery.com/rating/
Usage: $('#rating').rating(method-to-execute, {maxvalue:5, curvalue:0});

arguments
onClick : required -- post changes to 
options
  increment : 1, // value to increment by
	maxvalue: number of stars
	curvalue: number of selected stars
	

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

jQuery.fn.rating = function(onClick, options) {
	if(onClick == null) return;
	
	var settings = {
		onClick : onClick, // post changes to 
		increment : 1, // value to increment by
		maxvalue  : 5,   // max number of stars
		curvalue  : 0,    // number of selected stars
		enable : true,
		disabledText : null
	};
	
	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,
		onClick: settings.onClick
	});
	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="Delete" id="image.votecancel">Delete</a></div>';
				container.empty().append(div);
			}
		} else {
			var $div = $('<div class="star"></div>')
				.append('<a href="#'+i+'" title="'+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 (settings.enable) {
    			event.drain();
	       		event.fill(this);
	       	}
		})
		.mouseout(function(){
            if (settings.enable) {
    			event.drain();
	   		    event.reset();
	   		}
		})
		.focus(function(){
            if (settings.enable) {
    			event.drain();
	       		event.fill(this);
	       	}
		})
		.blur(function(){
            if (settings.enable) {
    			event.drain();
	       		event.reset();
	       	}
		});

	stars.click(function(){
		if (settings.enable == true) {
			if(settings.cancel == true){
      			settings.curvalue = (stars.index(this) * settings.increment) + settings.increment;
			      var value = jQuery(this).children('a')[0].href.split('#')[1] 
				container.onClick(value);
				return false;
			} else if (settings.maxvalue == 1) {
				settings.curvalue = (settings.curvalue == 0) ? 1 : 0;
				$(this).toggleClass('on');
			      var value = jQuery(this).children('a')[0].href.split('#')[1] 
				container.onClick(value);
				return false;
			}
			return true;
		} else {
            if (settings.disabledText) alert(settings.disabledText);
            return false;
        }
	  });

	// cancel button events
	if(cancel){
		cancel
			.mouseover(function(){
                if (settings.enable) {
	   		      event.drain();
		  	      jQuery(this).addClass('on');
		  	    }
			})
			.mouseout(function(){
                if (settings.enable) {
			      event.reset();
			      jQuery(this).removeClass('on');
			    }
			})
			.focus(function(){
                if (settings.enable) {
			      event.drain();
			      jQuery(this).addClass('on');
			    }
			})
			.blur(function(){
                if (settings.enable) {
	   			  event.reset();
			      jQuery(this).removeClass('on');
			    }
			});
      
		// click events.
		cancel.click(function(){
            if (settings.enable) {
    			event.drain();
	       		settings.curvalue = 0;
			    var value = jQuery(this).children('a')[0].href.split('#')[1] 
			    container.onClick(0);
			    return false;
			} else {
                if (settings.disabledText) alert(settings.disabledText);
            }
		});
	}
        
	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();
		},
		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.slice(0,settings.curvalue / settings.increment).addClass('on').end();
		}
	};    
	event.reset();

	this.reset = function(inValue) {
        event.drain();
		settings.curvalue = inValue;
		event.reset();
	}

	this.disable = function() {
		settings.enable = false;
	}

	this.enable = function() {
		settings.enable = true;
	}
	
	this.setDisabledText = function(text) {
	   settings.disabledText = text;
	}
	
	return(this);	
};