Add leaderboard for all tracks and track calendar

server/internal/storage/postgres/pgstore.go

@@ -370,4 +370,52 @@ func (s *PgStore) UpdateCarStats(ctx context.Context, id string, fn func(*catalo
 		return err
 	}
 	return tx.Commit(ctx)
+}
+
+// GetTrackCalendar returns all track calendar entries ordered by start_at.
+func (s *PgStore) GetTrackCalendar(ctx context.Context) ([]catalog.TrackCalendarEntry, error) {
+	query := `SELECT id, track_id, start_at, end_at FROM track_calendar ORDER BY start_at ASC`
+	rows, err := s.pool.Query(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var entries []catalog.TrackCalendarEntry
+	for rows.Next() {
+		var entry catalog.TrackCalendarEntry
+		if err := rows.Scan(&entry.ID, &entry.TrackID, &entry.StartAt, &entry.EndAt); err != nil {
+			return nil, err
+		}
+		entries = append(entries, entry)
+	}
+	return entries, nil
+}
+
+// CreateTrackCalendar inserts a new calendar entry.
+func (s *PgStore) CreateTrackCalendar(ctx context.Context, entry catalog.TrackCalendarEntry) (catalog.TrackCalendarEntry, error) {
+	query := `
+		INSERT INTO track_calendar (track_id, start_at, end_at)
+		VALUES ($1, $2, $3)
+		RETURNING id, track_id, start_at, end_at`
+	
+	row := s.pool.QueryRow(ctx, query, entry.TrackID, entry.StartAt, entry.EndAt)
+	var res catalog.TrackCalendarEntry
+	if err := row.Scan(&res.ID, &res.TrackID, &res.StartAt, &res.EndAt); err != nil {
+		return catalog.TrackCalendarEntry{}, err
+	}
+	return res, nil
+}
+
+// DeleteTrackCalendar deletes a calendar entry by ID.
+func (s *PgStore) DeleteTrackCalendar(ctx context.Context, id int) error {
+	command := `DELETE FROM track_calendar WHERE id = $1`
+	res, err := s.pool.Exec(ctx, command, id)
+	if err != nil {
+		return err
+	}
+	if res.RowsAffected() == 0 {
+		return catalog.ErrNotFound
+	}
+	return nil
 }