package postgres import ( "context" "database/sql" "embed" "errors" "fmt" "net/url" "time" "git.cryptic.systems/volker.raschek/flucky/pkg/types" "git.cryptic.systems/volker.raschek/go-logger" "github.com/golang-migrate/migrate/v4" "github.com/johejo/golang-migrate-extra/source/iofs" ) var ( //go:embed ddl/*.sql postgresDDLAssets embed.FS //go:embed dml/deleteDeviceByID.sql deleteDeviceByIDSQL string //go:embed dml/deleteDeviceByName.sql deleteDeviceByNameSQL string //go:embed dml/deleteSensorByID.sql deleteSensorByIDSQL string //go:embed dml/deleteSensorByName.sql deleteSensorByNameSQL string //go:embed dml/insertDevice.sql insertDeviceSQL string //go:embed dml/insertHumidity.sql insertHumiditySQL string //go:embed dml/insertOrUpdateDevice.sql insertOrUpdateDeviceSQL string //go:embed dml/insertOrUpdateHumidity.sql insertOrUpdateHumiditySQL string //go:embed dml/insertOrUpdatePressure.sql insertOrUpdatePressureSQL string //go:embed dml/insertOrUpdateSensor.sql insertOrUpdateSensorSQL string //go:embed dml/insertOrUpdateTemperature.sql insertOrUpdateTemperatureSQL string //go:embed dml/insertPressure.sql insertPressureSQL string //go:embed dml/insertSensor.sql insertSensorSQL string //go:embed dml/insertTemperature.sql insertTemperatureSQL string //go:embed dml/selectDeviceByID.sql selectDeviceByIDSQL string //go:embed dml/selectDeviceByName.sql selectDeviceByNameSQL string //go:embed dml/selectDevices.sql selectDevicesSQL string //go:embed dml/selectHumidities.sql selectHumiditiesSQL string //go:embed dml/selectHumidityByID.sql selectHumidityByIDSQL string //go:embed dml/selectPressureByID.sql selectPressureByIDSQL string //go:embed dml/selectPressures.sql selectPressuresSQL string //go:embed dml/selectSensorByID.sql selectSensorByIDSQL string //go:embed dml/selectSensors.sql selectSensorsSQL string //go:embed dml/selectSensorsByDeviceID.sql selectSensorsByDeviceIDSQL string //go:embed dml/selectSensorsByModel.sql selectSensorsByModelSQL string //go:embed dml/selectSensorsByName.sql selectSensorsByNameSQL string //go:embed dml/selectTemperatureByID.sql selectTemperatureByIDSQL string //go:embed dml/selectTemperatures.sql selectTemperaturesSQL string //go:embed dml/updateDevice.sql updateDeviceSQL string //go:embed dml/updateSensor.sql updateSensorSQL string ) type Opts struct { DatabaseURL *url.URL Logger logger.Logger } func (o *Opts) Validate() error { for k, v := range map[string]interface{}{ "DatabaseURL": o.DatabaseURL, "Logger": o.Logger, } { if v == nil { return fmt.Errorf("%v does not be empty or nil", k) } } if o.DatabaseURL.Scheme != "postgres" { return fmt.Errorf("Unsupported database scheme %v for database backend postgres", o.DatabaseURL.Scheme) } return nil } func New(opts Opts) (*Postgres, error) { if err := opts.Validate(); err != nil { return nil, err } sqlDBO, err := sql.Open(opts.DatabaseURL.Scheme, opts.DatabaseURL.String()) if err != nil { return nil, err } return &Postgres{ databaseURL: opts.DatabaseURL, dbo: sqlDBO, flogger: opts.Logger, }, nil } // Postgres implementation type Postgres struct { databaseURL *url.URL dbo *sql.DB flogger logger.Logger } // AddDevices into the database func (postgres *Postgres) AddDevices(ctx context.Context, devices ...*types.Device) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() err = postgres.insertDevices(tx, devices...) if err != nil { return err } return tx.Commit() } func (postgres *Postgres) insertDevices(tx *sql.Tx, devices ...*types.Device) error { stmt, err := tx.Prepare(insertDeviceSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, device := range devices { if device.CreationDate.Equal(time.Time{}) { device.CreationDate = time.Now() } _, err = stmt.Exec( &device.ID, &device.Name, &device.Location, &device.CreationDate, &device.UpdateDate, ) if err != nil { return fmt.Errorf("Failed to execute statement: %v", err) } } return nil } func (postgres *Postgres) AddOrUpdateDevices(ctx context.Context, devices ...*types.Device) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() stmt, err := tx.Prepare(insertOrUpdateDeviceSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %w", err) } defer stmt.Close() for _, device := range devices { if device.CreationDate.Equal(time.Time{}) { device.CreationDate = time.Now() } _, err = stmt.Exec( &device.ID, &device.Name, &device.Location, &device.CreationDate, &device.UpdateDate, ) if err != nil { return fmt.Errorf("Failed to execute statement: %v", err) } } return tx.Commit() } // AddMeasuredValues into the database func (postgres *Postgres) AddMeasuredValues(ctx context.Context, measuredValues ...*types.MeasuredValue) error { splittedMeasuredValues := make(map[types.MeasuredValueType][]*types.MeasuredValue, 0) for _, measuredValue := range measuredValues { if _, ok := splittedMeasuredValues[measuredValue.ValueType]; !ok { splittedMeasuredValues[measuredValue.ValueType] = make([]*types.MeasuredValue, 0) } splittedMeasuredValues[measuredValue.ValueType] = append(splittedMeasuredValues[measuredValue.ValueType], measuredValue) } tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() // General insert function insert := func(tx *sql.Tx, query string, measuredValues []*types.MeasuredValue) error { stmt, err := tx.Prepare(query) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, measuredValue := range measuredValues { if measuredValue.CreationDate.Equal(time.Time{}) { measuredValue.CreationDate = time.Now() } _, err := stmt.Exec( &measuredValue.ID, &measuredValue.Value, &measuredValue.Date, &measuredValue.SensorID, &measuredValue.CreationDate, &measuredValue.UpdateDate, ) if err != nil { return fmt.Errorf("Failed to execute statement: %v", err) } } return nil } for measuredValueType, measuredValues := range splittedMeasuredValues { var queryFile string switch measuredValueType { case types.Humidity: queryFile = insertHumiditySQL case types.Pressure: queryFile = insertPressureSQL case types.Temperature: queryFile = insertTemperatureSQL default: return fmt.Errorf("Measured value type %v not supported", measuredValueType) } err := insert(tx, queryFile, measuredValues) if err != nil { return err } } return tx.Commit() } // AddOrUpdateMeasuredValues into the database func (postgres *Postgres) AddOrUpdateMeasuredValues(ctx context.Context, measuredValues ...*types.MeasuredValue) error { splittedMeasuredValues := make(map[types.MeasuredValueType][]*types.MeasuredValue, 0) for _, measuredValue := range measuredValues { if _, ok := splittedMeasuredValues[measuredValue.ValueType]; !ok { splittedMeasuredValues[measuredValue.ValueType] = make([]*types.MeasuredValue, 0) } splittedMeasuredValues[measuredValue.ValueType] = append(splittedMeasuredValues[measuredValue.ValueType], measuredValue) } tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() // General insert function insert := func(tx *sql.Tx, query string, measuredValues []*types.MeasuredValue) error { stmt, err := tx.Prepare(query) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, measuredValue := range measuredValues { if measuredValue.CreationDate.Equal(time.Time{}) { measuredValue.CreationDate = time.Now() } _, err := stmt.Exec( &measuredValue.ID, &measuredValue.Value, &measuredValue.Date, &measuredValue.SensorID, &measuredValue.CreationDate, &measuredValue.UpdateDate, ) if err != nil { return fmt.Errorf("Failed to execute statement: %v", err) } } return nil } for measuredValueType, measuredValues := range splittedMeasuredValues { var queryFile string switch measuredValueType { case types.Humidity: queryFile = insertOrUpdateHumiditySQL case types.Pressure: queryFile = insertOrUpdatePressureSQL case types.Temperature: queryFile = insertOrUpdateTemperatureSQL default: return fmt.Errorf("Measured value type %v not supported", measuredValueType) } err := insert(tx, queryFile, measuredValues) if err != nil { return err } } return tx.Commit() } // AddSensors into the database func (postgres *Postgres) AddSensors(ctx context.Context, sensors ...*types.Sensor) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() stmt, err := tx.Prepare(insertSensorSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, sensor := range sensors { if sensor.CreationDate.Equal(time.Time{}) { sensor.CreationDate = time.Now() } _, err = stmt.Exec( &sensor.ID, &sensor.Name, &sensor.Location, &sensor.WireID, &sensor.I2CBus, &sensor.I2CAddress, &sensor.GPIONumber, &sensor.Model, &sensor.Enabled, &sensor.TickDuration, &sensor.DeviceID, &sensor.CreationDate, &sensor.UpdateDate, ) if err != nil { return fmt.Errorf("Failed to execute statement: %v", err) } } return tx.Commit() } // AddOrUpdateSensors into the database func (postgres *Postgres) AddOrUpdateSensors(ctx context.Context, sensors ...*types.Sensor) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() stmt, err := tx.Prepare(insertOrUpdateSensorSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, sensor := range sensors { if sensor.CreationDate.Equal(time.Time{}) { sensor.CreationDate = time.Now() } _, err = stmt.Exec( &sensor.ID, &sensor.Name, &sensor.Location, &sensor.WireID, &sensor.I2CBus, &sensor.I2CAddress, &sensor.GPIONumber, &sensor.Model, &sensor.Enabled, &sensor.TickDuration, &sensor.DeviceID, &sensor.CreationDate, &sensor.UpdateDate, ) if err != nil { return fmt.Errorf("Failed to execute statement: %v", err) } } return tx.Commit() } // Close closes the database and prevents new queries from starting. Close then // waits for all queries that have started processing on the server to finish. func (postgres *Postgres) Close() error { return postgres.dbo.Close() } // Migrate creates all required tables if not exist func (postgres *Postgres) Migrate(ctx context.Context) error { sourceDriver, err := iofs.New(postgresDDLAssets, "ddl") if err != nil { return err } m, err := migrate.NewWithSourceInstance("iofs", sourceDriver, postgres.databaseURL.String()) if err != nil { return err } err = m.Up() switch { case errors.Is(err, migrate.ErrNoChange): return nil default: return err } } // GetDevice from database func (postgres *Postgres) GetDeviceByID(ctx context.Context, id string) (*types.Device, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() devices, err := postgres.selectDevices(tx, selectDeviceByIDSQL, id) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } if len(devices) == 0 { return nil, nil } return devices[0], nil } // GetDevice from database func (postgres *Postgres) GetDeviceByName(ctx context.Context, name string) (*types.Device, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() devices, err := postgres.selectDevices(tx, selectDeviceByNameSQL, name) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } if len(devices) == 0 { return nil, nil } return devices[0], nil } // GetDevices from the database func (postgres *Postgres) GetDevices(ctx context.Context) ([]*types.Device, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() devices, err := postgres.selectDevices(tx, selectDevicesSQL) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, fmt.Errorf("Failed to commit transaction: %v", err) } return devices, nil } func (postgres *Postgres) selectDevices(tx *sql.Tx, query string, args ...interface{}) ([]*types.Device, error) { stmt, err := tx.Prepare(query) if err != nil { return nil, fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() rows, err := stmt.Query(args...) if err != nil { return nil, fmt.Errorf("Failed to query statement: %v", err) } devices := make([]*types.Device, 0) for rows.Next() { device := new(types.Device) err = rows.Scan( &device.ID, &device.Name, &device.Location, &device.CreationDate, &device.UpdateDate, ) if err != nil { return nil, fmt.Errorf("Failed to scan row: %v", err) } devices = append(devices, device) } return devices, nil } // GetHumidity returns humidity from the database func (postgres *Postgres) GetHumidityByID(ctx context.Context, id string) (*types.MeasuredValue, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, err } defer tx.Rollback() measuredValues, err := postgres.selectMeasuredValue(tx, selectHumidityByIDSQL, id) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } if measuredValues == nil { return nil, nil } for _, measuredValue := range measuredValues { measuredValue.ValueType = types.Humidity } return measuredValues[0], nil } // GetHumidities returns humidities from the database func (postgres *Postgres) GetHumidities(ctx context.Context) ([]*types.MeasuredValue, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, err } defer tx.Rollback() measuredValues, err := postgres.selectMeasuredValue(tx, selectHumiditiesSQL) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } for _, measuredValue := range measuredValues { measuredValue.ValueType = types.Humidity } return measuredValues, nil } func (postgres *Postgres) selectMeasuredValue(tx *sql.Tx, query string, args ...interface{}) ([]*types.MeasuredValue, error) { stmt, err := tx.Prepare(query) if err != nil { return nil, err } defer stmt.Close() rows, err := stmt.Query(args...) if err != nil { return nil, err } measuredValues := make([]*types.MeasuredValue, 0) for rows.Next() { measuredValue := new(types.MeasuredValue) err := rows.Scan( &measuredValue.ID, &measuredValue.Value, &measuredValue.Date, &measuredValue.SensorID, &measuredValue.CreationDate, &measuredValue.UpdateDate, ) if err != nil { return nil, err } measuredValues = append(measuredValues, measuredValue) } return measuredValues, nil } // GetPressure returns pressure from the database func (postgres *Postgres) GetPressureByID(ctx context.Context, id string) (*types.MeasuredValue, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, err } defer tx.Rollback() measuredValues, err := postgres.selectMeasuredValue(tx, selectPressureByIDSQL, id) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } if measuredValues == nil { return nil, nil } for _, measuredValue := range measuredValues { measuredValue.ValueType = types.Pressure } return measuredValues[0], nil } // GetPressures returns pressure from the database func (postgres *Postgres) GetPressures(ctx context.Context) ([]*types.MeasuredValue, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, err } defer tx.Rollback() measuredValues, err := postgres.selectMeasuredValue(tx, selectPressuresSQL) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } for _, measuredValue := range measuredValues { measuredValue.ValueType = types.Pressure } return measuredValues, nil } // GetSensor from database func (postgres *Postgres) GetSensorByID(ctx context.Context, id string) (*types.Sensor, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() sensors, err := postgres.selectSensors(tx, selectSensorByIDSQL, id) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, fmt.Errorf("Failed to commit transaction: %v", err) } if len(sensors) == 0 { return nil, nil } return sensors[0], nil } // GetSensors from the database func (postgres *Postgres) GetSensors(ctx context.Context) ([]*types.Sensor, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() sensors, err := postgres.selectSensors(tx, selectSensorsSQL) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, fmt.Errorf("Failed to commit transaction: %v", err) } return sensors, nil } // GetSensorsByModels from the database func (postgres *Postgres) GetSensorsByDeviceIDs(ctx context.Context, deviceIDs ...string) ([]*types.Sensor, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() cachedSensors := make([]*types.Sensor, 0) for i := range deviceIDs { sensors, err := postgres.selectSensors(tx, selectSensorsByDeviceIDSQL, deviceIDs[i]) if err != nil { return nil, err } cachedSensors = append(cachedSensors, sensors...) } err = tx.Commit() if err != nil { return nil, fmt.Errorf("Failed to commit transaction: %v", err) } return cachedSensors, nil } // GetSensorsByModel from the database func (postgres *Postgres) GetSensorsByModels(ctx context.Context, sensorModels ...string) ([]*types.Sensor, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } cachedSensors := make([]*types.Sensor, 0) for i := range sensorModels { sensors, err := postgres.selectSensors(tx, selectSensorsByModelSQL, sensorModels[i]) if err != nil { return nil, err } cachedSensors = append(cachedSensors, sensors...) } err = tx.Commit() if err != nil { return nil, fmt.Errorf("Failed to commit transaction: %v", err) } return cachedSensors, nil } // GetSensorsByModel from the database func (postgres *Postgres) GetSensorsByNames(ctx context.Context, sensorNames ...string) ([]*types.Sensor, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() cachedSensors := make([]*types.Sensor, 0) for i := range sensorNames { sensors, err := postgres.selectSensors(tx, selectSensorsByNameSQL, sensorNames[i]) if err != nil { return nil, err } cachedSensors = append(cachedSensors, sensors...) } err = tx.Commit() if err != nil { return nil, fmt.Errorf("Failed to commit transaction: %v", err) } return cachedSensors, nil } func (postgres *Postgres) selectSensors(tx *sql.Tx, query string, args ...interface{}) ([]*types.Sensor, error) { stmt, err := tx.Prepare(query) if err != nil { return nil, fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() rows, err := stmt.Query(args...) if err != nil { return nil, fmt.Errorf("Failed to query statement: %v", err) } sensors := make([]*types.Sensor, 0) for rows.Next() { sensor := new(types.Sensor) err = rows.Scan( &sensor.ID, &sensor.Name, &sensor.Location, &sensor.WireID, &sensor.I2CBus, &sensor.I2CAddress, &sensor.GPIONumber, &sensor.Model, &sensor.Enabled, &sensor.TickDuration, &sensor.DeviceID, &sensor.CreationDate, &sensor.UpdateDate, ) if err != nil { return nil, fmt.Errorf("Failed to scan row: %v", err) } sensors = append(sensors, sensor) } return sensors, nil } // GetTemperature returns temperatures from the database func (postgres *Postgres) GetTemperatureByID(ctx context.Context, id string) (*types.MeasuredValue, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, err } defer tx.Rollback() measuredValues, err := postgres.selectMeasuredValue(tx, selectTemperatureByIDSQL, id) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } if measuredValues == nil { return nil, nil } for _, measuredValue := range measuredValues { measuredValue.ValueType = types.Temperature } return measuredValues[0], nil } // GetTemperatures returns temperatures from the database func (postgres *Postgres) GetTemperatures(ctx context.Context) ([]*types.MeasuredValue, error) { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true}) if err != nil { return nil, err } defer tx.Rollback() measuredValues, err := postgres.selectMeasuredValue(tx, selectTemperaturesSQL) if err != nil { return nil, err } err = tx.Commit() if err != nil { return nil, err } for _, measuredValue := range measuredValues { measuredValue.ValueType = types.Temperature } return measuredValues, nil } // RemoveDevices from the database func (postgres *Postgres) RemoveDevicesByIDs(ctx context.Context, deviceIDs ...string) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() stmt, err := tx.Prepare(deleteDeviceByIDSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, deviceID := range deviceIDs { _, err = stmt.Exec(deviceID) if err != nil { return err } } return tx.Commit() } // RemoveDevices from the database func (postgres *Postgres) RemoveDevicesByNames(ctx context.Context, names ...string) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() stmt, err := tx.Prepare(deleteDeviceByNameSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, deviceID := range names { _, err = stmt.Exec(deviceID) if err != nil { return err } } return tx.Commit() } // RemoveSensors from the database func (postgres *Postgres) RemoveSensorsByIDs(ctx context.Context, sensorIDs ...string) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() stmt, err := tx.Prepare(deleteSensorByIDSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, sensorID := range sensorIDs { _, err = stmt.Exec(sensorID) if err != nil { return err } } return tx.Commit() } // RemoveSensors from the database func (postgres *Postgres) RemoveSensorsByNames(ctx context.Context, sensorIDs ...string) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return fmt.Errorf("Failed to begin new transaction: %v", err) } defer tx.Rollback() stmt, err := tx.Prepare(deleteSensorByNameSQL) if err != nil { return fmt.Errorf("Failed to prepare statement: %v", err) } defer stmt.Close() for _, sensorID := range sensorIDs { _, err = stmt.Exec(sensorID) if err != nil { return err } } return tx.Commit() } // UpdateDevices updates a device in the database func (postgres *Postgres) UpdateDevices(ctx context.Context, devices ...*types.Device) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return err } defer tx.Rollback() stmt, err := tx.Prepare(updateDeviceSQL) if err != nil { return err } defer stmt.Close() for _, device := range devices { now := time.Now() device.UpdateDate = &now _, err := stmt.Exec( &device.Name, &device.Location, &device.CreationDate, &device.UpdateDate, &device.ID, ) if err != nil { return err } } return tx.Commit() } // UpdateSensors updates a sensor in the database func (postgres *Postgres) UpdateSensors(ctx context.Context, sensors ...*types.Sensor) error { tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false}) if err != nil { return err } defer tx.Rollback() stmt, err := tx.Prepare(updateSensorSQL) if err != nil { return err } defer stmt.Close() for _, sensor := range sensors { now := time.Now() sensor.UpdateDate = &now _, err := stmt.Exec( &sensor.Name, &sensor.Location, &sensor.WireID, &sensor.I2CBus, &sensor.I2CAddress, &sensor.GPIONumber, &sensor.Model, &sensor.Enabled, &sensor.TickDuration, &sensor.DeviceID, &sensor.CreationDate, &sensor.UpdateDate, &sensor.ID, ) if err != nil { return err } } return tx.Commit() }