add register data mechanism

internal/domains/sensors/repository.go

@@ -35,8 +35,11 @@ func (p *pgxRepo) CreateSensor(s Sensor) error {
 	return err
 }
 
+const createSensorDataQuery = `insert into registry (sensor_id, value, created_at) values ($1, $2, $3)`
+
 func (p *pgxRepo) CreateSensorData(s SensorData) error {
-	return nil
+	_, err := p.Exec(context.Background(), createSensorDataQuery, s.SensorID, s.Value, s.Timestamp)
+	return err
 }
 
 func (p *pgxRepo) UpdateSensor(s Sensor) error {
@@ -106,7 +109,32 @@ func (i *inMemory) CreateSensor(s Sensor) error {
 	return nil
 }
 
-func (p *inMemory) CreateSensorData(s SensorData) error {
+func (i *inMemory) CreateSensorData(data SensorData) error {
+	i.mu.Lock()
+	defer i.mu.Unlock()
+
+	sensor, exists := i.sensors[data.SensorID]
+	if !exists {
+		return ErrSensorNotFound
+	}
+
+	if sensor.SensorData == nil {
+		sensor.SensorData = &map[int]SensorData{}
+	}
+
+	key := int(data.Timestamp.Unix())
+	(*sensor.SensorData)[key] = data
+
+	if len(*sensor.SensorData) > 100 {
+		oldestKey := key
+		for k := range *sensor.SensorData {
+			if k < oldestKey {
+				oldestKey = k
+			}
+		}
+		delete(*sensor.SensorData, oldestKey)
+	}
+
 	return nil
 }
 
@@ -169,7 +197,12 @@ func (d *DecoratorRepo) CreateSensor(s Sensor) error {
 	return nil
 }
 
-func (p *DecoratorRepo) CreateSensorData(s SensorData) error {
+func (d *DecoratorRepo) CreateSensorData(data SensorData) error {
+	if err := d.db.CreateSensorData(data); err != nil {
+		return err
+	}
+
+	_ = d.memory.CreateSensorData(data)
 	return nil
 }