if(typeof(Prototype)=="undefined"){throw"Control.Rating requires Prototype to be loaded.";}
if(typeof(Object.Event)=="undefined"){throw"Control.Rating requires Object.Event to be loaded.";}
Control.Rating=Class.create({initialize:function(container,options){Control.Rating.instances.push(this);this.value=false;this.links=[];this.container=$(container);this.container.update('');this.options={min:1,max:5,rated:false,input:false,reverse:false,capture:true,multiple:false,classNames:{off:'rating_off',half:'rating_half',on:'rating_on',selected:'rating_selected'},updateUrl:false,updateParameterName:'value',updateOptions:{},afterChange:Prototype.emptyFunction};Object.extend(this.options,options||{});if(this.options.value){this.value=this.options.value;delete this.options.value;}
if(this.options.input){this.options.input=$(this.options.input);this.options.input.observe('change',function(input){this.setValueFromInput(input);}.bind(this,this.options.input));this.setValueFromInput(this.options.input,true);}
var range=$R(this.options.min,this.options.max);(this.options.reverse?$A(range).reverse():range).each(function(i){var link=this.buildLink(i);this.container.appendChild(link);this.links.push(link);}.bind(this));this.setValue(this.value||this.options.min-1,false,true);},buildLink:function(rating){var link=$(document.createElement('a'));link.value=rating;if(this.options.multiple||(!this.options.rated&&!this.options.multiple)){link.href='';link.onmouseover=this.mouseOver.bind(this,link);link.onmouseout=this.mouseOut.bind(this,link);link.onclick=this.click.bindAsEventListener(this,link);}else{link.style.cursor='default';link.observe('click',function(event){Event.stop(event);return false;}.bindAsEventListener(this));}
link.addClassName(this.options.classNames.off);return link;},disable:function(){this.links.each(function(link){link.onmouseover=Prototype.emptyFunction;link.onmouseout=Prototype.emptyFunction;link.onclick=Prototype.emptyFunction;link.observe('click',function(event){Event.stop(event);return false;}.bindAsEventListener(this));link.style.cursor='default';}.bind(this));},setValueFromInput:function(input,prevent_callbacks){this.setValue($F(input),true,prevent_callbacks);},setValue:function(value,force_selected,prevent_callbacks){this.value=value;if(this.options.input){if(this.options.input.options){$A(this.options.input.options).each(function(option,i){if(option.value==this.value){this.options.input.options.selectedIndex=i;throw $break;}}.bind(this));}else{this.options.input.value=this.value;}}
this.render(this.value,force_selected);if(!prevent_callbacks){if(this.options.updateUrl){var params={},a;params[this.options.updateParameterName]=this.value;a=new Ajax.Request(this.options.updateUrl,Object.extend(this.options.updateOptions,{parameters:params}));}
this.notify('afterChange',this.value);}},render:function(rating,force_selected){(this.options.reverse?this.links.reverse():this.links).each(function(link,i){if(link.value<=Math.ceil(rating)){link.className=this.options.classNames[link.value<=rating?'on':'half'];if(this.options.rated||force_selected){link.addClassName(this.options.classNames.selected);}}else{link.className=this.options.classNames.off;}}.bind(this));},mouseOver:function(link){this.render(link.value,true);},mouseOut:function(link){this.render(this.value);},click:function(event,link){this.options.rated=true;this.setValue((link.value?link.value:link),true);if(!this.options.multiple){this.disable();}
if(this.options.capture){Event.stop(event);return false;}}});Object.extend(Control.Rating,{instances:[],findByElementId:function(id){return Control.Rating.instances.find(function(instance){return(instance.container.id&&instance.container.id==id);});}});Object.Event.extend(Control.Rating);