add output for mqtt client

internal/processing/mqtt-message-create.go

@@ -0,0 +1,90 @@
+package processing
+
+import (
+	"context"
+	"fmt"
+)
+
+type MQTTMessage struct {
+	Topic    string
+	QoS      byte
+	Payload  any
+	Retained bool
+}
+
+type MQTTMessageCreate struct {
+	config   ProcessorConfig
+	Topic    string
+	QoS      byte
+	Retained bool
+	Payload  any
+}
+
+func (mmc *MQTTMessageCreate) Process(ctx context.Context, payload any) (any, error) {
+
+	message := MQTTMessage{
+		Topic:    mmc.Topic,
+		QoS:      mmc.QoS,
+		Retained: mmc.Retained,
+		Payload:  mmc.Payload,
+	}
+
+	return message, nil
+}
+
+func (mmc *MQTTMessageCreate) Type() string {
+	return mmc.config.Type
+}
+
+func init() {
+	RegisterProcessor(ProcessorRegistration{
+		Type: "mqtt.message.create",
+		New: func(config ProcessorConfig) (Processor, error) {
+			params := config.Params
+			topic, ok := params["topic"]
+
+			if !ok {
+				return nil, fmt.Errorf("mqtt.message.create requires an topic parameter")
+			}
+
+			topicString, ok := topic.(string)
+
+			if !ok {
+				return nil, fmt.Errorf("mqtt.message.create topic must be a string")
+			}
+
+			qos, ok := params["qos"]
+
+			if !ok {
+				return nil, fmt.Errorf("mqtt.message.create requires an qos parameter")
+			}
+
+			qosByte, ok := qos.(float64)
+
+			if !ok {
+				return nil, fmt.Errorf("mqtt.message.create qos must be a number")
+			}
+
+			retained, ok := params["retained"]
+
+			if !ok {
+				return nil, fmt.Errorf("mqtt.message.create requires an retained parameter")
+			}
+
+			retainedBool, ok := retained.(bool)
+
+			if !ok {
+				return nil, fmt.Errorf("mqtt.message.create retained must be a boolean")
+			}
+
+			//TODO(jwetzell): convert payload into []byte or string for sending
+			payload, ok := params["payload"]
+
+			if !ok {
+				return nil, fmt.Errorf("mqtt.message.create requires an payload parameter")
+			}
+
+			return &MQTTMessageCreate{config: config, Topic: topicString, QoS: byte(qosByte), Retained: retainedBool, Payload: payload}, nil
+		},
+	})
+}

mqtt-client.go

@@ -5,6 +5,7 @@ import (
 	"log/slog"
 
 	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"github.com/jwetzell/showbridge-go/internal/processing"
 )
 
 type MQTTClient struct {
@@ -104,5 +105,23 @@ func (mc *MQTTClient) Run() error {
 }
 
 func (mc *MQTTClient) Output(payload any) error {
-	return fmt.Errorf("net.mqtt.client output is not implemented")
+	payloadMessage, ok := payload.(processing.MQTTMessage)
+
+	if !ok {
+		return fmt.Errorf("net.mqtt.client is only able to output MQTTMessage")
+	}
+
+	if mc.client == nil {
+		return fmt.Errorf("net.mqtt.client client is not setup")
+	}
+
+	if !mc.client.IsConnected() {
+		return fmt.Errorf("net.mqtt.client is not connected")
+	}
+
+	token := mc.client.Publish(payloadMessage.Topic, payloadMessage.QoS, payloadMessage.Retained, payloadMessage.Payload)
+
+	token.Wait()
+
+	return token.Error()
 }