Play custom JSON BodyParser

ApiBodyParser.scala

object ApiBodyParser extends BodyParsers {

    def apply[T](key: String)(implicit rds: Reads[T]): BodyParser[T] = parse.json.flatMap {
        jsValue => (jsValue \ key).validate[T] match {
            case JsSuccess(item, path) => {
                BodyParser("api parser") {
                    request => Done(Right(item), Input.Empty)
                }
            }
            // TODO: json error message with validation error
            case e: JsError =>
                parse.error(Future.successful(Results.BadRequest(e.toString)))
        }
    }
}