/**
 * Given an doc id like `2025-01-01-some-name`, will return a date matching
 * the starting portion of the id.
 */
export function idToDate(id: string, fallback: () => Date) {
  const dateString = /^(?<date>\d{4}-\d{2}-\d{2})/.exec(id)?.groups?.date;
  return dateString ? new Date(dateString) : fallback();
}