feat(pkg/db): postgres database

pkg/db/db.go

@@ -0,0 +1,36 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+
+	_ "github.com/lib/pq"
+)
+
+type DBOType string
+
+func (dboType DBOType) String() string {
+	return string(dboType)
+}
+
+const (
+	DBOTypePostgres DBOType = "postgres"
+	DBOTypeOracle           = "oracle"
+)
+
+func New(dboType DBOType, host string, port string, database string, user string, password string) (Database, error) {
+	connStr := fmt.Sprintf("%v://%v:%v@%v:%v/%v?sslmode=disable", dboType.String(), user, password, host, port, database)
+	newDBO, err := sql.Open(dboType.String(), connStr)
+	if err != nil {
+		return nil, err
+	}
+
+	switch dboType {
+	case "postgres":
+		return &Postgres{
+			dbo: newDBO,
+		}, nil
+	default:
+		return nil, fmt.Errorf("Unknown Database Type")
+	}
+}

pkg/db/errors.go

@@ -0,0 +1,16 @@
+package db
+
+import (
+	"errors"
+)
+
+var (
+	errorBeginTransaction         = errors.New("Can not start new transaction")
+	errorRowNotFound              = errors.New("Can not find row by given ID")
+	errorPrepareStatement         = errors.New("Can not prepare sql statement")
+	errorRollbackTransaction      = errors.New("Can not rollback transaction")
+	errorScanRow                  = errors.New("Can not scan row")
+	errorStatementExecute         = errors.New("Can not execute statement")
+	errorStatementQuery           = errors.New("Can not query statement")
+	errorUnknownMeasuredValueType = errors.New("Unknown measured value type")
+)

pkg/db/interfaces.go

@@ -0,0 +1,39 @@
+package db
+
+import (
+	"context"
+
+	"github.com/go-flucky/flucky/pkg/types"
+)
+
+type Database interface {
+
+	// Close DB Connction
+	Close() error
+
+	// Delete
+	DeleteDevices(ctx context.Context, devices []*types.Device) error
+	DeleteMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error
+	DeleteSensors(ctx context.Context, sensors []*types.Sensor) error
+
+	// Insert
+	InsertDevices(ctx context.Context, devices []*types.Device) error
+	InsertMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error
+	InsertSensors(ctx context.Context, sensors []*types.Sensor) error
+
+	// Select
+	SelectDeviceByID(ctx context.Context, id string) (*types.Device, error)
+	SelectHumidities(ctx context.Context) ([]*types.MeasuredValue, error)
+	SelectHumidityByID(ctx context.Context, id string) (*types.MeasuredValue, error)
+	SelectMeasuredValuesByIDAndType(ctx context.Context, id string, valueType types.MeasuredValueType) (*types.MeasuredValue, error)
+	SelectPressures(ctx context.Context) ([]*types.MeasuredValue, error)
+	SelectPressureByID(ctx context.Context, id string) (*types.MeasuredValue, error)
+	SelectSensorByID(ctx context.Context, id string) (*types.Sensor, error)
+	SelectTemperatures(ctx context.Context) ([]*types.MeasuredValue, error)
+	SelectTemperatureByID(ctx context.Context, id string) (*types.MeasuredValue, error)
+
+	// Update
+	UpdateDevices(ctx context.Context, devices []*types.Device) error
+	UpdateMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error
+	UpdateSensors(ctx context.Context, sensots []*types.Sensor) error
+}

pkg/db/postgres.go

@@ -0,0 +1,410 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+
+	"github.com/go-flucky/flucky/pkg/types"
+	_ "github.com/lib/pq"
+)
+
+type Postgres struct {
+	dbo *sql.DB
+}
+
+func (p *Postgres) Close() error {
+	return p.Close()
+}
+
+func (p *Postgres) DeleteDevices(ctx context.Context, devices []*types.Device) error {
+	query := string(MustAsset("pkg/db/sql/psql/deleteDevice.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+	defer stmt.Close()
+
+	for _, device := range devices {
+		_, err := stmt.ExecContext(ctx, &device.DeviceID)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorStatementExecute, err)
+		}
+	}
+
+	return nil
+}
+
+func (p *Postgres) DeleteSensors(ctx context.Context, sensors []*types.Sensor) error {
+	query := string(MustAsset("pkg/db/sql/psql/deleteSensor.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+	defer stmt.Close()
+
+	for _, sensor := range sensors {
+		_, err := stmt.ExecContext(ctx, &sensor.SensorID)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorStatementExecute, err)
+		}
+	}
+
+	return nil
+}
+
+func (p *Postgres) DeleteMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error {
+
+	deleteMeasuredValue := func(ctx context.Context, query string, measuredValues []*types.MeasuredValue) error {
+		stmt, err := p.dbo.PrepareContext(ctx, query)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+		}
+		defer stmt.Close()
+
+		for _, measuredValue := range measuredValues {
+			_, err := stmt.ExecContext(ctx, &measuredValue.ID)
+			if err != nil {
+				return fmt.Errorf("%v: %v", errorStatementExecute, err)
+			}
+		}
+		return nil
+	}
+
+	sortedMeasuredValueTypes := make(map[types.MeasuredValueType][]*types.MeasuredValue)
+	for _, measuredValue := range measuredValues {
+		if _, ok := sortedMeasuredValueTypes[measuredValue.ValueType]; !ok {
+			sortedMeasuredValueTypes[measuredValue.ValueType] = make([]*types.MeasuredValue, 0)
+		}
+		sortedMeasuredValueTypes[measuredValue.ValueType] = append(sortedMeasuredValueTypes[measuredValue.ValueType], measuredValue)
+	}
+
+	for measuredValueType, sortedMeasuredValues := range sortedMeasuredValueTypes {
+		switch measuredValueType {
+		case types.MeasuredValueTypeHumidity:
+			if err := deleteMeasuredValue(ctx, string(MustAsset("pkg/db/sql/psql/deleteHumidity.sql")), sortedMeasuredValues); err != nil {
+				return err
+			}
+		case types.MeasuredValueTypePressure:
+			if err := deleteMeasuredValue(ctx, string(MustAsset("pkg/db/sql/psql/deletePressure.sql")), sortedMeasuredValues); err != nil {
+				return err
+			}
+		case types.MeasuredValueTypeTemperature:
+			if err := deleteMeasuredValue(ctx, string(MustAsset("pkg/db/sql/psql/deleteTemperature.sql")), sortedMeasuredValues); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func (p *Postgres) InsertDevices(ctx context.Context, devices []*types.Device) error {
+
+	query := string(MustAsset("pkg/db/sql/psql/insertDevice.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+	defer stmt.Close()
+
+	for _, device := range devices {
+		_, err := stmt.ExecContext(ctx, &device.DeviceID, &device.DeviceName, &device.DeviceLocation, &device.CreationDate)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorStatementExecute, err)
+		}
+	}
+
+	return nil
+}
+
+func (p *Postgres) InsertMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error {
+
+	sortedMeasuredValueTypes := make(map[types.MeasuredValueType][]*types.MeasuredValue)
+
+	for _, measuredValue := range measuredValues {
+		if _, ok := sortedMeasuredValueTypes[measuredValue.ValueType]; !ok {
+			sortedMeasuredValueTypes[measuredValue.ValueType] = make([]*types.MeasuredValue, 0)
+		}
+		sortedMeasuredValueTypes[measuredValue.ValueType] = append(sortedMeasuredValueTypes[measuredValue.ValueType], measuredValue)
+	}
+
+	for measuredValueType, sortedMeasuredValues := range sortedMeasuredValueTypes {
+		switch measuredValueType {
+		case types.MeasuredValueTypeHumidity:
+			if err := p.insertHumidity(ctx, sortedMeasuredValues); err != nil {
+				return err
+			}
+		case types.MeasuredValueTypePressure:
+			if err := p.insertPressure(ctx, sortedMeasuredValues); err != nil {
+				return err
+			}
+		case types.MeasuredValueTypeTemperature:
+			if err := p.insertTemperature(ctx, sortedMeasuredValues); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func (p *Postgres) insertHumidity(ctx context.Context, measuredValues []*types.MeasuredValue) error {
+
+	query := string(MustAsset("pkg/db/sql/psql/insertHumidity.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+	defer stmt.Close()
+
+	for _, measuredValue := range measuredValues {
+
+		if measuredValue.ValueType != types.MeasuredValueTypeHumidity {
+			continue
+		}
+
+		_, err := stmt.ExecContext(ctx, &measuredValue.ID, &measuredValue.Value, &measuredValue.FromDate, &measuredValue.TillDate, &measuredValue.SensorID, &measuredValue.CreationDate, &measuredValue.UpdateDate)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorStatementExecute, err)
+		}
+	}
+	return nil
+}
+
+func (p *Postgres) insertPressure(ctx context.Context, measuredValues []*types.MeasuredValue) error {
+
+	query := string(MustAsset("pkg/db/sql/psql/insertPressure.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+	defer stmt.Close()
+
+	for _, measuredValue := range measuredValues {
+
+		if measuredValue.ValueType != types.MeasuredValueTypePressure {
+			continue
+		}
+
+		_, err := stmt.ExecContext(ctx, &measuredValue.ID, &measuredValue.Value, &measuredValue.FromDate, &measuredValue.TillDate, &measuredValue.SensorID, &measuredValue.CreationDate, &measuredValue.UpdateDate)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorStatementExecute, err)
+		}
+	}
+	return nil
+}
+
+func (p *Postgres) insertTemperature(ctx context.Context, measuredValues []*types.MeasuredValue) error {
+
+	query := string(MustAsset("pkg/db/sql/psql/insertTemperature.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+	defer stmt.Close()
+
+	for _, measuredValue := range measuredValues {
+
+		if measuredValue.ValueType != types.MeasuredValueTypeTemperature {
+			continue
+		}
+
+		_, err := stmt.ExecContext(ctx, &measuredValue.ID, &measuredValue.Value, &measuredValue.FromDate, &measuredValue.TillDate, &measuredValue.SensorID, &measuredValue.CreationDate, &measuredValue.UpdateDate)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorStatementExecute, err)
+		}
+	}
+	return nil
+}
+
+func (p *Postgres) InsertSensors(ctx context.Context, sensors []*types.Sensor) error {
+
+	query := string(MustAsset("pkg/db/sql/psql/insertSensor.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+	defer stmt.Close()
+
+	for _, sensor := range sensors {
+
+		_, err := stmt.ExecContext(ctx, &sensor.SensorID, &sensor.SensorName, &sensor.SensorLocation, &sensor.WireID, &sensor.I2CBus, &sensor.I2CAddress, &sensor.GPIONumber, &sensor.SensorModel, &sensor.SensorEnabled, &sensor.DeviceID, &sensor.CreationDate)
+		if err != nil {
+			return fmt.Errorf("%v: %v", errorStatementExecute, err)
+		}
+	}
+	return nil
+}
+
+func (p *Postgres) SelectDeviceByID(ctx context.Context, id string) (*types.Device, error) {
+	query := string(MustAsset("pkg/db/sql/psql/selectDeviceByID.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return nil, fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+
+	row := stmt.QueryRowContext(ctx, id)
+	if row == nil {
+		return nil, errorRowNotFound
+	}
+
+	device := new(types.Device)
+	err = row.Scan(&device.DeviceID, &device.DeviceName, &device.DeviceLocation, &device.CreationDate)
+	if err != nil {
+		return nil, fmt.Errorf("%v: %v", errorScanRow, err)
+	}
+
+	return device, nil
+}
+
+func (p *Postgres) SelectMeasuredValuesByIDAndType(ctx context.Context, id string, valueType types.MeasuredValueType) (*types.MeasuredValue, error) {
+	switch valueType {
+	case types.MeasuredValueTypeHumidity:
+		return p.SelectHumidityByID(ctx, id)
+	case types.MeasuredValueTypePressure:
+		return p.SelectPressureByID(ctx, id)
+	case types.MeasuredValueTypeTemperature:
+		return p.SelectTemperatureByID(ctx, id)
+	default:
+		return nil, fmt.Errorf("%v: %v", errorUnknownMeasuredValueType, valueType)
+	}
+}
+
+func (p *Postgres) SelectHumidities(ctx context.Context) ([]*types.MeasuredValue, error) {
+	queryFile := "pkg/db/sql/psql/selectHumidities.sql"
+	measuredValues, err := p.selectMeasuredValues(ctx, types.MeasuredValueTypeHumidity, queryFile, nil)
+	if err != nil {
+		return nil, err
+	}
+	return measuredValues, nil
+}
+
+func (p *Postgres) SelectHumidityByID(ctx context.Context, id string) (*types.MeasuredValue, error) {
+	queryFile := "pkg/db/sql/psql/selectHumidityByID.sql"
+	args := []interface{}{id}
+	measuredValues, err := p.selectMeasuredValues(ctx, types.MeasuredValueTypeHumidity, queryFile, args)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(measuredValues) == 0 {
+		return nil, fmt.Errorf("%v: %v", errorRowNotFound, id)
+	}
+
+	return measuredValues[0], nil
+}
+
+func (p *Postgres) SelectPressures(ctx context.Context) ([]*types.MeasuredValue, error) {
+	queryFile := "pkg/db/sql/psql/selectPressures.sql"
+	measuredValues, err := p.selectMeasuredValues(ctx, types.MeasuredValueTypePressure, queryFile, nil)
+	if err != nil {
+		return nil, err
+	}
+	return measuredValues, nil
+}
+
+func (p *Postgres) SelectPressureByID(ctx context.Context, id string) (*types.MeasuredValue, error) {
+	queryFile := "pkg/db/sql/psql/selectPressureByID.sql"
+	args := []interface{}{id}
+	measuredValues, err := p.selectMeasuredValues(ctx, types.MeasuredValueTypePressure, queryFile, args)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(measuredValues) == 0 {
+		return nil, fmt.Errorf("%v: %v", errorRowNotFound, id)
+	}
+
+	return measuredValues[0], nil
+}
+
+func (p *Postgres) SelectSensorByID(ctx context.Context, id string) (*types.Sensor, error) {
+	query := string(MustAsset("pkg/db/sql/psql/selectSensorByID.sql"))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return nil, fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+
+	row := stmt.QueryRowContext(ctx, id)
+	if row == nil {
+		return nil, errorRowNotFound
+	}
+
+	sensor := new(types.Sensor)
+	err = row.Scan(&sensor.SensorID, &sensor.SensorName, &sensor.SensorLocation, &sensor.WireID, &sensor.I2CBus, &sensor.I2CAddress, &sensor.GPIONumber, &sensor.SensorModel, &sensor.SensorEnabled, &sensor.DeviceID, &sensor.CreationDate)
+	if err != nil {
+		return nil, fmt.Errorf("%v: %v", errorScanRow, err)
+	}
+
+	return sensor, nil
+}
+
+func (p *Postgres) SelectTemperatures(ctx context.Context) ([]*types.MeasuredValue, error) {
+	queryFile := "pkg/db/sql/psql/selectTemperatures.sql"
+	measuredValues, err := p.selectMeasuredValues(ctx, types.MeasuredValueTypeTemperature, queryFile, nil)
+	if err != nil {
+		return nil, err
+	}
+	return measuredValues, nil
+}
+
+func (p *Postgres) SelectTemperatureByID(ctx context.Context, id string) (*types.MeasuredValue, error) {
+	queryFile := "pkg/db/sql/psql/selectTemperatureByID.sql"
+	args := []interface{}{id}
+	measuredValues, err := p.selectMeasuredValues(ctx, types.MeasuredValueTypeTemperature, queryFile, args)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(measuredValues) == 0 {
+		return nil, fmt.Errorf("%v: %v", errorRowNotFound, id)
+	}
+
+	return measuredValues[0], nil
+}
+
+func (p *Postgres) selectMeasuredValues(ctx context.Context, measuredValueType types.MeasuredValueType, queryFile string, queryArgs []interface{}) ([]*types.MeasuredValue, error) {
+	query := string(MustAsset(queryFile))
+
+	stmt, err := p.dbo.PrepareContext(ctx, query)
+	if err != nil {
+		return nil, fmt.Errorf("%v: %v", errorPrepareStatement, err)
+	}
+
+	rows, err := stmt.QueryContext(ctx, queryArgs...)
+	if err != nil {
+		return nil, fmt.Errorf("%v: %v", errorStatementQuery, err)
+	}
+
+	measuredValues := make([]*types.MeasuredValue, 0)
+	for rows.Next() {
+		measuredValue := new(types.MeasuredValue)
+		measuredValue.ValueType = measuredValueType
+		rows.Scan(&measuredValue.ID, &measuredValue.Value, &measuredValue.FromDate, &measuredValue.TillDate, &measuredValue.SensorID, &measuredValue.CreationDate, &measuredValue.UpdateDate)
+		measuredValues = append(measuredValues, measuredValue)
+	}
+
+	return measuredValues, nil
+}
+
+func (p *Postgres) UpdateDevices(ctx context.Context, devices []*types.Device) error {
+	return nil
+}
+
+func (p *Postgres) UpdateMeasuredValues(ctx context.Context, measuredValues []*types.MeasuredValue) error {
+	return nil
+}
+
+func (p *Postgres) UpdateSensors(ctx context.Context, sensots []*types.Sensor) error {
+	return nil
+}

pkg/db/postgres_test.go

@@ -0,0 +1,273 @@
+package db_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/go-flucky/flucky/pkg/db"
+	"github.com/go-flucky/flucky/pkg/types"
+	"github.com/go-flucky/flucky/test/goldenfiles"
+	"github.com/stretchr/testify/require"
+)
+
+type test struct {
+	Name string
+	Test func(*testing.T)
+}
+
+var (
+	database db.Database
+
+	postgresContainerImage string = "docker.io/postgres/postgres"
+	postgresHost           string = "localhost"
+	postgresPort           string = "5432"
+	postgresUser           string = "postgres"
+	postgresPassword       string = "postgres"
+	postgresDatabase       string = "postgres"
+
+	goldenDevicesFilePath        string = "test/goldenfiles/json/goldenDevices.json"
+	goldenSensorsFilePath        string = "test/goldenfiles/json/goldenSensors.json"
+	goldenMeasuredValuesFilePath string = "test/goldenfiles/json/goldenMeasuredValues.json"
+	goldenPressuresFilePath      string = "test/goldenfiles/json/goldenPressures.json"
+	goldenHumiditiesFilePath     string = "test/goldenfiles/json/goldenHumidities.json"
+	goldenTemperaturesFilePath   string = "test/goldenfiles/json/goldenTemperatures.json"
+
+	goldenDevices        []*types.Device
+	goldenSensors        []*types.Sensor
+	goldenMeasuredValues []*types.MeasuredValue
+	goldenPressures      []*types.MeasuredValue
+	goldenHumidites      []*types.MeasuredValue
+	goldenTemperatures   []*types.MeasuredValue
+)
+
+func load(t *testing.T) {
+	require := require.New(t)
+
+	d, err := goldenfiles.GetGoldenDevices(goldenDevicesFilePath)
+	require.NoError(err)
+	goldenDevices = d
+
+	s, err := goldenfiles.GetGoldenSensors(goldenSensorsFilePath)
+	require.NoError(err)
+	goldenSensors = s
+
+	hum, err := goldenfiles.GetGoldenMeasuredValues(goldenHumiditiesFilePath)
+	require.NoError(err)
+	goldenHumidites = hum
+
+	mv, err := goldenfiles.GetGoldenMeasuredValues(goldenMeasuredValuesFilePath)
+	require.NoError(err)
+	goldenMeasuredValues = mv
+
+	pres, err := goldenfiles.GetGoldenMeasuredValues(goldenPressuresFilePath)
+	require.NoError(err)
+	goldenPressures = pres
+
+	temp, err := goldenfiles.GetGoldenMeasuredValues(goldenTemperaturesFilePath)
+	require.NoError(err)
+	goldenTemperatures = temp
+
+}
+
+func TestPostgres(t *testing.T) {
+	require := require.New(t)
+
+	load(t)
+
+	db, err := db.New(db.DBOTypePostgres, postgresHost, postgresPort, postgresDatabase, postgresUser, postgresPassword)
+	database = db
+	require.Nil(err)
+
+	tests := []*test{
+		&test{
+			Name: "insertDevices",
+			Test: testInsertDevices,
+		},
+		&test{
+			Name: "insertSensors",
+			Test: testInsertSensors,
+		},
+		&test{
+			Name: "insertHumidity",
+			Test: testInsertHumidity,
+		},
+		&test{
+			Name: "insertPressure",
+			Test: testInsertPressure,
+		},
+		&test{
+			Name: "insertTemperatures",
+			Test: testInsertTemperatures,
+		},
+		&test{
+			Name: "deleteHumidities",
+			Test: testDeleteHumidity,
+		},
+		&test{
+			Name: "deletePressures",
+			Test: testDeletePressures,
+		},
+		&test{
+			Name: "deleteTemperatures",
+			Test: testDeleteTemperatures,
+		},
+		&test{
+			Name: "insertMeasuredValues",
+			Test: testInsertMeasuredValues,
+		},
+		&test{
+			Name: "deleteMeasuredValues",
+			Test: testDeleteMeasuredValues,
+		},
+		&test{
+			Name: "deleteSensors",
+			Test: testDeleteSensors,
+		},
+		&test{
+			Name: "deleteDevices",
+			Test: testDeleteDevices,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.Name, test.Test)
+	}
+}
+
+func testInsertDevices(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.InsertDevices(ctx, goldenDevices)
+	require.NoError(err)
+	for _, goldenDevice := range goldenDevices {
+		testDevice, err := database.SelectDeviceByID(ctx, goldenDevice.DeviceID)
+		require.NoError(err)
+		goldenfiles.CompareMeasuredValues(t, goldenDevice, testDevice)
+	}
+}
+
+func testInsertSensors(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.InsertSensors(ctx, goldenSensors)
+	require.NoError(err)
+	for _, goldenSensor := range goldenSensors {
+		testSensor, err := database.SelectSensorByID(ctx, goldenSensor.SensorID)
+		require.NoError(err)
+		goldenfiles.CompareMeasuredValues(t, goldenSensor, testSensor)
+	}
+}
+
+func testInsertHumidity(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.InsertMeasuredValues(ctx, goldenHumidites)
+	require.NoError(err)
+	for _, goldenHumidity := range goldenHumidites {
+		testHumidity, err := database.SelectHumidityByID(ctx, goldenHumidity.ID)
+		require.NoError(err)
+		goldenfiles.CompareMeasuredValues(t, []*types.MeasuredValue{testHumidity}, []*types.MeasuredValue{testHumidity})
+	}
+}
+
+func testInsertMeasuredValues(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.InsertMeasuredValues(ctx, goldenMeasuredValues)
+	require.NoError(err)
+	for _, goldenMeasuredValue := range goldenMeasuredValues {
+		testMeasuredValue, err := database.SelectMeasuredValuesByIDAndType(ctx, goldenMeasuredValue.ID, goldenMeasuredValue.ValueType)
+		require.NoError(err)
+		goldenfiles.CompareMeasuredValues(t, []*types.MeasuredValue{goldenMeasuredValue}, []*types.MeasuredValue{testMeasuredValue})
+	}
+}
+
+func testInsertPressure(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.InsertMeasuredValues(ctx, goldenPressures)
+	require.NoError(err)
+	for _, goldenPressure := range goldenPressures {
+		testPressure, err := database.SelectPressureByID(ctx, goldenPressure.ID)
+		require.NoError(err)
+		goldenfiles.CompareMeasuredValues(t, []*types.MeasuredValue{testPressure}, []*types.MeasuredValue{testPressure})
+	}
+}
+
+func testInsertTemperatures(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.InsertMeasuredValues(ctx, goldenTemperatures)
+	require.NoError(err)
+	for _, goldenTemperature := range goldenTemperatures {
+		testTemperature, err := database.SelectTemperatureByID(ctx, goldenTemperature.ID)
+		require.NoError(err)
+		goldenfiles.CompareMeasuredValues(t, []*types.MeasuredValue{goldenTemperature}, []*types.MeasuredValue{testTemperature})
+	}
+}
+
+func testDeleteDevices(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.DeleteDevices(ctx, goldenDevices)
+	require.NoError(err)
+	for _, goldenDevice := range goldenDevices {
+		_, err := database.SelectDeviceByID(ctx, goldenDevice.DeviceID)
+		require.Error(err)
+	}
+}
+
+func testDeleteSensors(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.DeleteSensors(ctx, goldenSensors)
+	require.NoError(err)
+	for _, goldenSensor := range goldenSensors {
+		_, err := database.SelectDeviceByID(ctx, goldenSensor.SensorID)
+		require.Error(err)
+	}
+}
+
+func testDeleteHumidity(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.DeleteMeasuredValues(ctx, goldenHumidites)
+	require.NoError(err)
+	for _, goldenHumidity := range goldenHumidites {
+		_, err := database.SelectHumidityByID(ctx, goldenHumidity.ID)
+		require.Error(err)
+	}
+}
+
+func testDeleteMeasuredValues(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.DeleteMeasuredValues(ctx, goldenMeasuredValues)
+	require.NoError(err)
+	for _, goldenMeasuredValue := range goldenMeasuredValues {
+		_, err := database.SelectPressureByID(ctx, goldenMeasuredValue.ID)
+		require.Error(err)
+	}
+}
+
+func testDeletePressures(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.DeleteMeasuredValues(ctx, goldenPressures)
+	require.NoError(err)
+	for _, goldenPressure := range goldenPressures {
+		_, err := database.SelectPressureByID(ctx, goldenPressure.ID)
+		require.Error(err)
+	}
+}
+
+func testDeleteTemperatures(t *testing.T) {
+	require := require.New(t)
+	ctx := context.Background()
+	err := database.DeleteMeasuredValues(ctx, goldenTemperatures)
+	require.NoError(err)
+	for _, goldenTemperature := range goldenTemperatures {
+		_, err := database.SelectTemperatureByID(ctx, goldenTemperature.ID)
+		require.Error(err)
+	}
+}

pkg/db/sql/psql/deleteDevice.sql

@@ -0,0 +1,2 @@
+DELETE FROM devices
+WHERE device_id = $1;

pkg/db/sql/psql/deleteHumidity.sql

@@ -0,0 +1,2 @@
+DELETE FROM humidities
+WHERE humidity_id = $1;

pkg/db/sql/psql/deletePressure.sql

@@ -0,0 +1,2 @@
+DELETE FROM pressures
+WHERE pressure_id = $1;

pkg/db/sql/psql/deleteSensor.sql

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

pkg/db/sql/psql/deleteTemperature.sql

@@ -0,0 +1,2 @@
+DELETE FROM temperatures
+WHERE temperature_id = $1;

pkg/db/sql/psql/insertDevice.sql

@@ -0,0 +1,7 @@
+INSERT INTO devices (
+  device_id,
+  device_name,
+  device_location,
+  creation_date
+)
+VALUES ($1, $2, $3, $4);

pkg/db/sql/psql/insertHumidity.sql

@@ -0,0 +1,10 @@
+INSERT INTO humidities (
+  humidity_id,
+  humidity_value,
+  humidity_from_date,
+  humidity_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+)
+VALUES ($1, $2, $3, $4, $5, $6, $7);

pkg/db/sql/psql/insertPressure.sql

@@ -0,0 +1,10 @@
+INSERT INTO pressures (
+  pressure_id,
+  pressure_value,
+  pressure_from_date,
+  pressure_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+)
+VALUES ($1, $2, $3, $4, $5, $6, $7);

pkg/db/sql/psql/insertSensor.sql

@@ -0,0 +1,14 @@
+INSERT INTO sensors (
+  sensor_id,
+  sensor_name,
+  sensor_location,
+  wire_id,
+  i2c_bus,
+  i2c_address,
+  gpio_number,
+  sensor_model,
+  sensor_enabled,
+  device_id,
+  creation_date
+)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11);

pkg/db/sql/psql/insertTemperature.sql

@@ -0,0 +1,10 @@
+INSERT INTO temperatures (
+  temperature_id,
+  temperature_value,
+  temperature_from_date,
+  temperature_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+)
+VALUES ($1, $2, $3, $4, $5, $6, $7);

pkg/db/sql/psql/schema.sql

@@ -0,0 +1,146 @@
+DROP TABLE IF EXISTS devices CASCADE;
+DROP TABLE IF EXISTS sensors CASCADE;
+DROP TABLE IF EXISTS humidities CASCADE;
+DROP TABLE IF EXISTS pressures CASCADE;
+DROP TABLE IF EXISTS temperatures CASCADE;
+
+
+-- +----------------------------------------+
+-- |                  TABLES                |
+-- +----------------------------------------+
+CREATE TABLE IF NOT EXISTS devices(
+  device_id               CHAR(36)                                                CONSTRAINT pk_devices PRIMARY KEY,
+  device_name             VARCHAR(32)                                             NOT NULL,
+  device_location         VARCHAR(32),
+  device_last_contact     TIMESTAMP WITH TIME ZONE    DEFAULT CURRENT_TIMESTAMP   NOT NULL,
+  creation_date           TIMESTAMP WITH TIME ZONE    DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS sensors (
+  sensor_id               CHAR(36)                                                CONSTRAINT pk_sensors PRIMARY KEY,
+  sensor_name             VARCHAR(32)                                             NOT NULL,
+  sensor_location         VARCHAR(32)                                             NOT NULL,
+  wire_id                 VARCHAR(15),
+  i2c_bus                 VARCHAR(255),
+  i2c_address             VARCHAR(12),
+  gpio_number             VARCHAR(6),
+  sensor_model            VARCHAR(16)                                             NOT NULL,
+  sensor_enabled          BOOLEAN                     DEFAULT TRUE                NOT NULL,
+  sensor_last_contact     TIMESTAMP WITH TIME ZONE    DEFAULT CURRENT_TIMESTAMP   NOT NULL,
+  device_id               CHAR(36),
+  creation_date           TIMESTAMP WITH TIME ZONE    DEFAULT CURRENT_TIMESTAMP   NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS humidities (
+  humidity_id             CHAR(36)                                                CONSTRAINT pk_humidities PRIMARY KEY,
+  humidity_value          NUMERIC(9,3)                                            NOT NULL,
+  humidity_from_date      TIMESTAMP WITH TIME ZONE                                NOT NULL,
+  humidity_till_date      TIMESTAMP WITH TIME ZONE,
+  sensor_id               CHAR(36),
+  creation_date           TIMESTAMP WITH TIME ZONE    DEFAULT CURRENT_TIMESTAMP   NOT NULL,
+  update_date             TIMESTAMP WITH TIME ZONE
+);
+
+CREATE TABLE IF NOT EXISTS pressures (
+  pressure_id             CHAR(36)                                                CONSTRAINT pk_pressures PRIMARY KEY,
+  pressure_value          NUMERIC(10,3)                                           NOT NULL,
+  pressure_from_date      TIMESTAMP WITH TIME ZONE                                NOT NULL,
+  pressure_till_date      TIMESTAMP WITH TIME ZONE,
+  sensor_id               CHAR(36),
+  creation_date           TIMESTAMP WITH TIME ZONE    DEFAULT CURRENT_TIMESTAMP   NOT NULL,
+  update_date             TIMESTAMP WITH TIME ZONE
+);
+
+CREATE TABLE IF NOT EXISTS temperatures (
+  temperature_id          CHAR(36)                                                CONSTRAINT pk_temperatures PRIMARY KEY,
+  temperature_value       NUMERIC(5,3)                                            NOT NULL,
+  temperature_from_date   TIMESTAMP WITH TIME ZONE                                NOT NULL,
+  temperature_till_date   TIMESTAMP WITH TIME ZONE,
+  sensor_id               CHAR(36),
+  creation_date           TIMESTAMP WITH TIME ZONE    DEFAULT CURRENT_TIMESTAMP   NOT NULL,
+  update_date             TIMESTAMP WITH TIME ZONE
+);
+
+-- +----------------------------------------+
+-- |               FOREIGN-KEYS             |
+-- +----------------------------------------+
+ALTER TABLE sensors
+ADD FOREIGN KEY (device_id)
+REFERENCES devices(device_id)
+ON DELETE CASCADE
+ON UPDATE CASCADE;
+
+ALTER TABLE humidities
+ADD FOREIGN KEY (sensor_id)
+REFERENCES sensors(sensor_id)
+ON DELETE CASCADE
+ON UPDATE CASCADE;
+
+ALTER TABLE pressures
+ADD FOREIGN KEY (sensor_id)
+REFERENCES sensors(sensor_id)
+ON DELETE CASCADE
+ON UPDATE CASCADE;
+
+ALTER TABLE temperatures
+ADD FOREIGN KEY (sensor_id)
+REFERENCES sensors(sensor_id)
+ON DELETE CASCADE
+ON UPDATE CASCADE;
+
+-- +----------------------------------------+
+-- |            Trigger-Functions           |
+-- +----------------------------------------+
+CREATE OR REPLACE FUNCTION device_last_contact()
+  RETURNS trigger AS
+$BODY$
+BEGIN
+ UPDATE devices
+ SET device_last_contact = CURRENT_TIMESTAMP
+ WHERE device_id = NEW.device_id;
+ RETURN NEW;
+END;
+$BODY$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION sensor_last_contact()
+  RETURNS trigger AS
+$BODY$
+BEGIN
+ UPDATE sensors
+ SET sensor_last_contact = CURRENT_TIMESTAMP,
+     sensor_enabled = true
+ WHERE sensor_id = NEW.sensor_id;
+ RETURN NEW;
+END;
+$BODY$ LANGUAGE plpgsql;
+
+-- +----------------------------------------+
+-- |                  Trigger               |
+-- +----------------------------------------+
+DROP TRIGGER IF EXISTS ai_humidities ON humidities;
+DROP TRIGGER IF EXISTS ai_pressure ON pressures;
+DROP TRIGGER IF EXISTS ai_temperatures ON temperatures;
+
+CREATE TRIGGER au_sensors
+  AFTER UPDATE
+  ON sensors
+  FOR EACH ROW
+  EXECUTE PROCEDURE device_last_contact();
+
+CREATE TRIGGER ai_humidities
+  AFTER INSERT
+  ON humidities
+  FOR EACH ROW
+  EXECUTE PROCEDURE sensor_last_contact();
+
+CREATE TRIGGER ai_pressures
+  AFTER INSERT
+  ON pressures
+  FOR EACH ROW
+  EXECUTE PROCEDURE sensor_last_contact();
+
+CREATE TRIGGER ai_temperatures
+  AFTER INSERT
+  ON temperatures
+  FOR EACH ROW
+  EXECUTE PROCEDURE sensor_last_contact();

pkg/db/sql/psql/selectDeviceByID.sql

@@ -0,0 +1,8 @@
+SELECT
+  device_id,
+  device_name,
+  device_location,
+  creation_date
+FROM
+  devices
+WHERE device_id = $1;

pkg/db/sql/psql/selectHumidities.sql

@@ -0,0 +1,10 @@
+SELECT
+  humidity_id,
+  humidity_value,
+  humidity_from_date,
+  humidity_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+FROM
+  humidities;

pkg/db/sql/psql/selectHumidityByID.sql

@@ -0,0 +1,12 @@
+SELECT
+  humidity_id,
+  humidity_value,
+  humidity_from_date,
+  humidity_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+FROM
+  humidities
+WHERE
+  humidity_id = $1;

pkg/db/sql/psql/selectPressureByID.sql

@@ -0,0 +1,12 @@
+SELECT
+  pressure_id,
+  pressure_value,
+  pressure_from_date,
+  pressure_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+FROM
+  pressures
+WHERE
+  pressure_id = $1;

pkg/db/sql/psql/selectPressures.sql

@@ -0,0 +1,10 @@
+SELECT
+  pressure_id,
+  pressure_value,
+  pressure_from_date,
+  pressure_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+FROM
+  pressures;

pkg/db/sql/psql/selectSensorByID.sql

@@ -0,0 +1,16 @@
+SELECT
+  sensor_id,
+  sensor_name,
+  sensor_location,
+  wire_id,
+  i2c_bus,
+  i2c_address,
+  gpio_number,
+  sensor_model,
+  sensor_enabled,
+  device_id,
+  creation_date
+FROM
+  sensors
+WHERE
+  sensor_id = $1;

pkg/db/sql/psql/selectTemperatureByID.sql

@@ -0,0 +1,12 @@
+SELECT
+  temperature_id,
+  temperature_value,
+  temperature_from_date,
+  temperature_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+FROM
+  temperatures
+WHERE
+  temperature_id = $1;

pkg/db/sql/psql/selectTemperatures.sql

@@ -0,0 +1,10 @@
+SELECT
+  temperature_id,
+  temperature_value,
+  temperature_from_date,
+  temperature_till_date,
+  sensor_id,
+  creation_date,
+  update_date
+FROM
+  temperatures;