fix: add, rename and remove sensor

changes:
- Implement function to add, rename and remove sensors

pkg/storage/postgres/removeSensorByID.sql

@@ -0,0 +1,2 @@
+DELETE FROM sensors
+WHERE sensor_id = $1;

pkg/storage/postgres/removeSensorByName.sql

@@ -0,0 +1,2 @@
+DELETE FROM sensors
+WHERE sensor_name = $1;

pkg/storage/storage.go

@@ -17,6 +17,8 @@ type Storage interface {
 	InsertDevice(ctx context.Context, device *types.Device) error
 	InsertMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error
 	InsertSensor(ctx context.Context, sensor *types.Sensor) error
+	RemoveSensorByID(ctx context.Context, sensorID string) error
+	RemoveSensorByName(ctx context.Context, sensorName string) error
 	SelectDevice(ctx context.Context, id string) (*types.Device, error)
 	SelectSensor(ctx context.Context, id string) (*types.Sensor, error)
 }
@@ -154,6 +156,64 @@ func (postgres *Postgres) InsertSensor(ctx context.Context, sensor *types.Sensor
 	return tx.Commit()
 }
 
+// RemoveSensorByID from the database
+func (postgres *Postgres) RemoveSensorByID(ctx context.Context, sensorID string) error {
+	asset := filepath.Join(postgresAssetPath, "removeSensorByID.sql")
+	queryBytes, err := Asset(asset)
+	if err != nil {
+		return fmt.Errorf("Failed to load asset %v: %v", asset, err)
+	}
+	query := string(queryBytes)
+
+	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
+	if err != nil {
+		return fmt.Errorf("Failed to begin new transaction: %v", err)
+	}
+
+	stmt, err := tx.Prepare(query)
+	if err != nil {
+		return fmt.Errorf("Failed to prepare statement: %v", err)
+	}
+	defer stmt.Close()
+
+	_, err = stmt.Exec(sensorID)
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	return tx.Commit()
+}
+
+// RemoveSensorByName from the database
+func (postgres *Postgres) RemoveSensorByName(ctx context.Context, sensorID string) error {
+	asset := filepath.Join(postgresAssetPath, "removeSensorByName.sql")
+	queryBytes, err := Asset(asset)
+	if err != nil {
+		return fmt.Errorf("Failed to load asset %v: %v", asset, err)
+	}
+	query := string(queryBytes)
+
+	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
+	if err != nil {
+		return fmt.Errorf("Failed to begin new transaction: %v", err)
+	}
+
+	stmt, err := tx.Prepare(query)
+	if err != nil {
+		return fmt.Errorf("Failed to prepare statement: %v", err)
+	}
+	defer stmt.Close()
+
+	_, err = stmt.Exec(sensorID)
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+
+	return tx.Commit()
+}
+
 // SelectDevice from database
 func (postgres *Postgres) SelectDevice(ctx context.Context, id string) (*types.Device, error) {
 	asset := filepath.Join(postgresAssetPath, "selectDeviceByID.sql")