// ConvertFieldsDown converts the fields into a payload
func (h *handler) ConvertFieldsDown(ctx log.Interface, appDown *types.DownlinkMessage, ttnDown *pb_broker.DownlinkMessage) error {
if appDown.PayloadFields == nil || len(appDown.PayloadFields) == 0 {
return nil
}
if appDown.PayloadRaw != nil {
return errors.NewErrInvalidArgument("Downlink", "Both Fields and Payload provided")
}
app, err := h.applications.Get(appDown.AppID)
if err != nil {
return nil
}
functions := &DownlinkFunctions{
Encoder: app.Encoder,
Logger: functions.Ignore,
}
message, _, err := functions.Process(appDown.PayloadFields, appDown.FPort)
if err != nil {
return err
}
appDown.PayloadRaw = message
return nil
}
ctx.WithError(err).Fatal("You are providing a valid HEX payload while sending payload in JSON.")
}
err = json.Unmarshal([]byte(args[1]), &message.PayloadFields)
if err != nil {
ctx.WithError(err).Fatal("Invalid json string")
return
}
} else { // Payload provided
payload, err := types.ParseHEX(args[1], len(args[1])/2)
if err != nil {
ctx.WithError(err).Fatal("Invalid Payload")
}
message.PayloadRaw = payload
}
token := client.PublishDownlink(message)
token.Wait()
if token.Error() != nil {
ctx.WithError(token.Error()).Fatal("Could not enqueue downlink")
}
ctx.Info("Enqueued downlink")
},
}
func init() {
RootCmd.AddCommand(downlinkCmd)
downlinkCmd.Flags().Int("fport", 1, "FPort for downlink")
downlinkCmd.Flags().Bool("json", false, "Provide the payload as JSON")
}
