responder.php

trait Responder
{
  
  #
  #params options value must be closure
  #
  protected function respondTo(array $options=array())
  {
    $contentType= $this->requestContentType();
    if ( array_key_exists($contentType, $options) && is_callable($options[$contentType])) return $options[$contentType]();
    return null;
  }

  #
  # get request content type
  #
  protected function requestContentType(){
    $mimes = array( 'application/json' => 'json', 'application/javascript' => 'js', 'text/html' => 'html', 
                    'text/xml' => 'xml', 'application/pdf', 'text/csv' => 'csv');
    if (array_key_exists(request()->header('content-type'), $mimes)) return $mimes[request()->header('content-type')];
    return 'html';
  }

}

## contoh buat di controller

public function index(Request $request){
    $links = $this->resources::all();
    return $this->respondTo(
      array('html'=> function() use ($links)
              {
               return $this->layout()->nest('content', $this->view, array('links'=> $links));
              },
            'json' => function() use ($links)
              {
                return Response::json($links, 200);    
              }
         )
      );
  }

### contoh di handler.php

public function render($request, Exception $exception)
    {        
        return $this->respondTo(
          array('html'=> function() use ($request, $exception)
                  {
                    return parent::render($request, $exception);       
                  },
                'json' => function() use ($request, $exception)
                  {
                    $statusCode = 500;
                    if ($exception instanceof ModelNotFoundException)
                    {
                        $statusCode= 404;
                    }
                    return Response::json(array("message" => $exception->getMessage()), $statusCode);    
                  }
             )
          );
    }

### contoh json request return html 
public function create()
	{
		$this->resources = array('car' => $this->resource,
 						'categories' => Category::ClassListSelectInput(),
 						'carList' => Car::carListSelectOptions()
 						);

		return  $this->respondTo(
			array('html'=> function()
				 			{
				 			 $this->layout->nest('content', $this->view, $this->resources);
				 			},
				  'js' => function()
				  		  {
				  		  	 $form = View::make($this->form, $this->resources)->render();
				  		  	 return View::make('admin.shared.modal', array('body' => $form))->render();
				  		  }
				 )
			);
	}