98 lines
2.1 KiB
Go
98 lines
2.1 KiB
Go
package dal
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import (
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"context"
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"database/sql"
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"time"
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)
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type ChamberState int
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const (
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ChamberStateIdle = iota
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ChamberStateCooling
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ChamberStateHeating
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)
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type TemperatureReadingDto struct {
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Time time.Time
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Sensor string
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Value int
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}
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type ChamberStateChangeDto struct {
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Time time.Time
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State ChamberState
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}
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func LoadTemperatureReadingsSince(ctx context.Context, tx *sql.Tx, since time.Time) ([]TemperatureReadingDto, error) {
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q := `
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SELECT
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c_time,
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sensor,
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value
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FROM temperature_reading
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WHERE
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c_time > ?
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ORDER BY c_time
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`
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r, err := tx.QueryContext(ctx, q, since)
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if err != nil {
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return nil, err
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}
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defer r.Close()
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readings := make([]TemperatureReadingDto, 0)
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var reading TemperatureReadingDto
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for r.Next() {
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err = r.Scan(&reading.Time, &reading.Sensor, &reading.Value)
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if err != nil {
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return nil, err
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}
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readings = append(readings, reading)
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}
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return readings, nil
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}
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func SaveTemperatureReading(ctx context.Context, tx *sql.Tx, sensor string, value int64) error {
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q := "INSERT INTO temperature_reading (sensor, value) VALUES (?, ?)"
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_, err := tx.ExecContext(ctx, q, sensor, value)
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return err
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}
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func SaveChamberState(ctx context.Context, tx *sql.Tx, state ChamberState) error {
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q := "INSERT INTO state_log (state) VALUES (?)"
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_, err := tx.ExecContext(ctx, q, state)
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return err
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}
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func LoadLastChamberStateChange(ctx context.Context, tx *sql.Tx) (t time.Time, err error) {
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q := "SELECT c_time FROM state_log ORDER BY c_time DESC LIMIT 1"
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err = tx.QueryRowContext(ctx, q).Scan(&t)
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return
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}
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func LoadChamberStateChangesSince(ctx context.Context, tx *sql.Tx, since time.Time) ([]ChamberStateChangeDto, error) {
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q := "SELECT c_time, state FROM state_log WHERE c_time > ? ORDER BY c_time"
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r, err := tx.QueryContext(ctx, q, since)
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if err != nil {
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return nil, err
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}
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defer r.Close()
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readings := make([]ChamberStateChangeDto, 0)
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var reading ChamberStateChangeDto
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for r.Next() {
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err = r.Scan(&reading.Time, &reading.Time, &reading.State)
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if err != nil {
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return nil, err
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}
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readings = append(readings, reading)
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}
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return readings, nil
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}
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