gistfile1.txt

class UserRequestValidator
{

    public function __invoke(Request $request, Response $response $next)
    {
        $validator = new Validator();
        
        //rules
        
        if ($validator->validate()) {
            return $next(UserRequest::make($request));  
            // ^^ makes UserRequest subclass of Request
            // or does it inject a UserDTO into a "attribute"
            // Attributes are hard to document. Typed request class would be better in theory.
        } else {
          return $response;
        }
    }
}