Function parseWindow

src/node/updater/MaintenanceWindow.ts:48–58

(raw: unknown)

 * callers should treat that as "tier 4 disabled, fall back to tier 3".
 */
export const parseWindow = (raw: unknown): MaintenanceWindow | null => {
  if (!raw || typeof raw !== 'object') return null;
  const r = raw as Record<string, unknown>;
  if (typeof r.start !== 'string' || typeof r.end !== 'string') return null;
  if (r.tz !== 'local' && r.tz !== 'utc') return null;
  const s = toMinutes(r.start);
  const e = toMinutes(r.end);
  if (s == null || e == null) return null;
  if (s === e) return null;
  return {start: r.start, end: r.end, tz: r.tz};
};

const wallMinutes = (now: Date, tz: MaintenanceWindow['tz']): number => (
  tz === 'utc'