80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
package database
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import (
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"context"
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"database/sql"
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"fmt"
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)
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// Settings returns every stored setting as a key/value map.
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func (db *DB) Settings(ctx context.Context) (map[string]string, error) {
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rows, err := db.QueryContext(ctx, `SELECT key, value FROM settings`)
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if err != nil {
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return nil, fmt.Errorf("load settings: %w", err)
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}
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defer rows.Close()
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out := map[string]string{}
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for rows.Next() {
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var k, v string
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if err := rows.Scan(&k, &v); err != nil {
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return nil, err
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}
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out[k] = v
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}
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return out, rows.Err()
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}
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// Setting reads a single setting. It returns ("", false, nil) when unset.
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func (db *DB) Setting(ctx context.Context, key string) (string, bool, error) {
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var v string
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err := db.QueryRowContext(ctx, `SELECT value FROM settings WHERE key = ?`, key).Scan(&v)
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switch {
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case err == sql.ErrNoRows:
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return "", false, nil
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case err != nil:
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return "", false, fmt.Errorf("read setting %s: %w", key, err)
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}
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return v, true, nil
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}
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// SetSetting writes one setting.
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func (db *DB) SetSetting(ctx context.Context, key, value string) error {
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_, err := db.ExecContext(ctx, `
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INSERT INTO settings (key, value, updated_at) VALUES (?, ?, unixepoch())
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ON CONFLICT (key) DO UPDATE SET value = excluded.value, updated_at = unixepoch()`,
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key, value)
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if err != nil {
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return fmt.Errorf("write setting %s: %w", key, err)
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}
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return nil
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}
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// SetSettings writes several settings atomically.
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func (db *DB) SetSettings(ctx context.Context, values map[string]string) error {
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if len(values) == 0 {
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return nil
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}
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return db.InTx(ctx, func(tx *sql.Tx) error {
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stmt, err := tx.PrepareContext(ctx, `
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INSERT INTO settings (key, value, updated_at) VALUES (?, ?, unixepoch())
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ON CONFLICT (key) DO UPDATE SET value = excluded.value, updated_at = unixepoch()`)
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if err != nil {
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return fmt.Errorf("prepare setting write: %w", err)
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}
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defer stmt.Close()
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for k, v := range values {
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if _, err := stmt.ExecContext(ctx, k, v); err != nil {
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return fmt.Errorf("write setting %s: %w", k, err)
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}
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}
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return nil
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})
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}
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// DeleteSetting removes a setting, reverting it to its built-in default.
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func (db *DB) DeleteSetting(ctx context.Context, key string) error {
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_, err := db.ExecContext(ctx, `DELETE FROM settings WHERE key = ?`, key)
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return err
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}
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