Base project

internal/mqtt/logger.go

@@ -0,0 +1,24 @@
+package mqtt
+
+import (
+	"log"
+	"strings"
+
+	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"go.uber.org/zap"
+)
+
+type ZapWriter struct {
+    sugar *zap.SugaredLogger
+}
+
+func (z *ZapWriter) Write(p []byte) (n int, err error) {
+    z.sugar.Debug(strings.TrimSpace(string(p)))
+    return len(p), nil
+}
+
+func SetupMQTTLogging(logger *zap.Logger) {
+    sugar := logger.Sugar()
+    mqtt.DEBUG = log.New(&ZapWriter{sugar: sugar}, "[DEBUG] ", 0)
+    mqtt.ERROR = log.New(&ZapWriter{sugar: sugar}, "[ERROR] ", 0)
+}

internal/mqtt/mqtt.go

@@ -0,0 +1,52 @@
+package mqtt
+
+import (
+	"MQTTLogger/config"
+	"MQTTLogger/internal/csv"
+	"time"
+
+	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"go.uber.org/zap"
+)
+
+func NewClient(logger *zap.Logger, config *config.Config, csvHelper *csv.Helper) mqtt.Client {
+	var f mqtt.MessageHandler = func(client mqtt.Client, msg mqtt.Message) {
+		csvHelper.AddEntry(time.Now().UTC().Format("2006-01-02 15:04:05"), msg.Topic(), string(msg.Payload()))
+	}
+
+	opts := mqtt.NewClientOptions().AddBroker(config.URI).SetClientID("mqtt-logger")
+	opts.SetKeepAlive(2 * time.Second)
+	opts.SetDefaultPublishHandler(f)
+	opts.SetPingTimeout(1 * time.Second)
+	opts.SetConnectionNotificationHandler(func(client mqtt.Client, notification mqtt.ConnectionNotification) {
+		switch n := notification.(type) {
+		case mqtt.ConnectionNotificationConnected:
+			logger.Info("Connected to MQTT broker")
+		case mqtt.ConnectionNotificationConnecting:
+			logger.Info("connecting", zap.Bool("isReconnect", n.IsReconnect), zap.Int("attempt", n.Attempt))
+		case mqtt.ConnectionNotificationFailed:
+			logger.Error("connection failed", zap.String("error", n.Reason.Error()))
+		case mqtt.ConnectionNotificationLost:
+			logger.Error("connection lost", zap.String("error", n.Reason.Error()))
+		case mqtt.ConnectionNotificationBroker:
+			logger.Info("broker", zap.String("name", n.Broker.String()))
+		case mqtt.ConnectionNotificationBrokerFailed:
+			logger.Error("broker failed", zap.String("broker", n.Broker.String()), zap.String("error", n.Reason.Error()))
+		}
+	})
+
+	c := mqtt.NewClient(opts)
+	if token := c.Connect(); token.Wait() && token.Error() != nil {
+		logger.Fatal("error connecting to MQTT broker", zap.Error(token.Error()))
+	}
+
+	return c
+}
+
+func StartListening(logger *zap.Logger, config *config.Config, client mqtt.Client) {
+	for _, topic := range config.Topics {
+		if token := client.Subscribe(topic, 0, nil); token.Wait() && token.Error() != nil {
+			logger.Error("error subscribing to topic", zap.String("topic", topic), zap.Error(token.Error()))
+		}
+	}
+}