add stop and update simulator

internal/domains/sensors/handlers.go

@@ -141,6 +141,8 @@ func (h *Handlers) update() {
 				return Sensor{}, err
 			}
 
+			h.simulator.UpdateSensor(req)
+
 			return req, nil
 		})
 	})

internal/domains/sensors/simulator.go

@@ -5,45 +5,76 @@ import (
 	"log/slog"
 	"math/rand"
 	"nats-app/internal/broker"
+	"sync"
 	"time"
 )
 
 type Simulator struct {
 	*broker.NATS
+	stopChannels map[string]chan bool
+	mu           sync.Mutex
 }
 
 func Start(nats *broker.NATS) *Simulator {
 	return &Simulator{
-		NATS: nats,
+		NATS:         nats,
+		stopChannels: make(map[string]chan bool),
 	}
 }
 
 func (s *Simulator) SimulateSensor(sensor Sensor) {
+	s.mu.Lock()
+	stopChan := make(chan bool)
+	s.stopChannels[sensor.SensorID] = stopChan
+	s.mu.Unlock()
+
 	ticker := time.NewTicker(*sensor.SamplingInterval * time.Second)
 	defer ticker.Stop()
 
-	for range ticker.C {
-		data := s.generateData(sensor)
+	for {
+		select {
+		case <-stopChan:
+			slog.Info("stopping simulator for sensor", "sensor_id", sensor.SensorID)
+			return
+		case <-ticker.C:
+			data := s.generateData(sensor)
 
-		if data.SensorID == "" {
-			slog.Warn("sensor data generation failed", "sensor_id", sensor.SensorID)
-			continue
-		}
+			if data.SensorID == "" {
+				slog.Warn("sensor data generation failed", "sensor_id", sensor.SensorID)
+				continue
+			}
 
-		payload, err := json.Marshal(data)
-		if err != nil {
-			slog.Error("failed to marshal sensor data", "error", err, "sensor_id", sensor.SensorID)
-			continue
-		}
+			payload, err := json.Marshal(data)
+			if err != nil {
+				slog.Error("failed to marshal sensor data", "error", err, "sensor_id", sensor.SensorID)
+				continue
+			}
 
-		subject := subjectSensorsData + sensor.SensorID
-		if err := s.Publish(subject, payload); err != nil {
-			slog.Error("failed to publish sensor data", "error", err, "subject", subject)
-		} else {
-			slog.Debug("sensor data published", "sensor_id", sensor.SensorID, "value", data.Value)
+			subject := subjectSensorsData + sensor.SensorID
+			if err := s.Publish(subject, payload); err != nil {
+				slog.Error("failed to publish sensor data", "error", err, "subject", subject)
+			} else {
+				slog.Debug("sensor data published", "sensor_id", sensor.SensorID, "value", data.Value)
+			}
 		}
 	}
+}
 
+func (s *Simulator) UpdateSensor(sensor Sensor) {
+	s.mu.Lock()
+	stopChan, exists := s.stopChannels[sensor.SensorID]
+	s.mu.Unlock()
+
+	if exists {
+		stopChan <- true
+
+		s.mu.Lock()
+		delete(s.stopChannels, sensor.SensorID)
+		s.mu.Unlock()
+	}
+
+	go s.SimulateSensor(sensor)
+	slog.Info("simulator updated for sensor", "sensor_id", sensor.SensorID, "new_interval", sensor.SamplingInterval)
 }
 
 func (s *Simulator) generateData(sensor Sensor) SensorData {