refactor(db): add flag to run without MQTT part

Use for local test for developement

Signed-off-by: Klagarge <remi@heredero.ch>

db/src/main.go

@@ -8,6 +8,7 @@ import (
 	"gateway/rest"
 	"log"
 	"os"
+	"slices"
 	"strings"
 	"time"
 )
@@ -92,18 +93,21 @@ func influxConnection() *influx.InfluxGateway {
 // @BasePath /api/v1
 // @securityDefinitions.basic BasicAuth
 func main() {
+	noMqtt := slices.Contains(os.Args[1:], "--no-mqtt")
+
 	// Load mapping configuration (reloaded dynamically on each access)
 	mappingPath := getEnv("MAPPING_CONFIG_PATH", "mapping.json")
 	mapping := NewDynamicMapping(mappingPath)
 
-	mqttGateway := mqttConnection()
-	defer mqttGateway.Disconnect()
-
 	influxGateway := influxConnection()
 	defer influxGateway.Close()
 
 	measurementName := getEnv("CAMPUS", "provence")
 
+	if !noMqtt {
+		mqttGateway := mqttConnection()
+		defer mqttGateway.Disconnect()
+
 		// Create measurement for provence topic
 		provenceMeasurement := point.CreateMeasurement[ProvenceData](measurementName)
 		// The incoming MQTT topic structure is: <gateway_id>/<node_id>/update
@@ -171,6 +175,9 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
+	} else {
+		log.Println("[Main] MQTT disabled (--no-mqtt flag set)")
+	}
 
 	// Initialize and start REST Gateway
 	restUsername := getEnv("REST_USERNAME", "user")