RecieveMessage.scala

  def rawbuffer2JsValue(rawBuffer: RawBuffer): Option[JsValue] = {
    for {
      bytes <- rawBuffer.asBytes()
    } yield {
      Json.parse(bytes.utf8String)
    }
  }

  def receiveFacebookMessages = withVerifiedPayload {
    Action (parse.raw) {
      request => {
        val response =
          for {
            json <- rawbuffer2JsValue(request.body)
          } yield {
            import MessageFormats.facebookPostingMessagesReads
            val messages = json.validate[FacebookPostingMessages]
            messages.fold(
              errors => {
                Logger.warn("Failed to validate message post...")
                BadRequest(Json.obj("status" ->"KO", "message" -> JsError.toJson(errors)))
              },
              messages => {
                Logger.info(s"Successfully parsed ${messages.messages().length} messages.")
                Ok
              }
            )
          }
        response.getOrElse({
          Logger.warn("Invalid request posted.")
          BadRequest("Invalid message posting...")
        })
      }
    }
  }