test: enable mosquitto password auth; add mqttping endpoint; use credentials in subscriber; publish defaults

cmd/server/main.go

@@ -13,10 +13,11 @@ import (
 	"github.com/gin-gonic/gin"
 
 	"git.piskot.si/SeminarM2/lambdaiot-core/internal/config"
-	mqttclient "git.piskot.si/SeminarM2/lambdaiot-core/internal/mqtt"
 	"git.piskot.si/SeminarM2/lambdaiot-core/internal/handler"
 	"git.piskot.si/SeminarM2/lambdaiot-core/internal/middleware"
+	mqttclient "git.piskot.si/SeminarM2/lambdaiot-core/internal/mqtt"
 )
+
 func main() {
 	// load configuration (look for ./config.toml by default)
 	cfg, err := config.Load("")
@@ -41,6 +42,7 @@ func main() {
 			log.Printf("warning: mqtt connect failed: %v", err)
 		} else {
 			mq = mqc
+			mqttclient.SetDefault(mqc)
 			// publish a startup message (non-blocking)
 			go func() {
 				msg := fmt.Sprintf("lambdaiot-core started on %s", addr)
@@ -51,7 +53,7 @@ func main() {
 		}
 	}
 
-    
+	// mqttping endpoint will be added after router initialization
 
 	// Gin setup
 	r := gin.New()
@@ -63,6 +65,20 @@ func main() {
 	r.GET("/hello", handler.Hello)
 	r.POST("/login", handler.Login)
 
+	// mqttping endpoint: publish current timestamp to MQTT topic
+	r.POST("/mqttping", func(c *gin.Context) {
+		ts := time.Now().Format(time.RFC3339)
+		if mq == nil {
+			c.JSON(http.StatusServiceUnavailable, gin.H{"error": "mqtt not connected"})
+			return
+		}
+		if err := mq.Publish(cfg.MQTT.Topic, []byte(ts)); err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"timestamp": ts})
+	})
+
 	// Protected routes
 	auth := r.Group("/")
 	auth.Use(middleware.AuthMiddleware(cfg.Server.JWTSecret))