feat: add endpoints for triggering sensor reads and actor writes

internal/handler/mqttping.go

@@ -2,23 +2,16 @@ package handler
 
 import (
 	"net/http"
-	"os"
 	"time"
 
-	"git.piskot.si/SeminarM2/lambdaiot-core/internal/mqtt"
 	"github.com/gin-gonic/gin"
 )
 
 // MQTTPing publishes the current timestamp to the configured MQTT topic
 func (h *Handler) MQTTPing(c *gin.Context) {
-	ts := time.Now().Format(time.RFC3339)
-	topic := os.Getenv("MQTT_TOPIC")
-	if topic == "" {
-		topic = "lambdaiot"
-	}
-	if err := mqtt.PublishDefault(topic, []byte(ts)); err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+	ts := time.Now().UTC().Format(time.RFC3339)
+	if !h.publishMQTT(c, gin.H{"type": "ping", "timestamp": ts}) {
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"timestamp": ts})
+	c.JSON(http.StatusOK, gin.H{"timestamp": ts, "topic": h.mqttTopic()})
 }