gistfile1.scala

object ErrorAsOk{
  import unfiltered.request._
  import unfiltered.response._

  def unapply[T](request: HttpRequest[T]): Option[Wrapper] = request match {
    case Params(params) =>
      params("ok") match {
        case "" :: xs => Some(NotOkWrapper)
        case "0" :: xs => Some(NotOkWrapper)
        case "false" :: xs => Some(NotOkWrapper)
        case Nil => Some(NotOkWrapper)
        case _ => Some(OkWrapper)
      }
  }

  trait Wrapper {
    def apply(status: Status): Status
  }

  object OkWrapper extends Wrapper {
    def apply(status: Status): Status = Ok
  }

  object NotOkWrapper extends Wrapper {
    def apply(status: Status): Status = status
  }
}