src/helpers/schedule-helpers.ts


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export function isInTimeframe(start: string, end: string) {
  const [startHourStr, startMinuteStr] = start.split(':');
  const startHour = Number.parseInt(startHourStr, 10);
  const startMinute = Number.parseInt(startMinuteStr, 10);

  const [endHourStr, endMinuteStr] = end.split(':');
  const endHour = Number.parseInt(endHourStr, 10);
  const endMinute = Number.parseInt(endMinuteStr, 10);

  const currentHour = new Date().getHours();
  const currentMinute = new Date().getMinutes();

  // Check if the end time is before the start time (scheduled overnight)
  // as we need to change our checks based on this
  const endBeforeStart =
    startHour > endHour || (startHour === endHour && startMinute > endMinute);

  if (
    // End is after start (e.g. 09:00-17:00)
    !endBeforeStart &&
    // Check if past start
    (currentHour > startHour ||
      (currentHour === startHour && currentMinute >= startMinute)) &&
    // Check that not past end
    (currentHour < endHour ||
      (currentHour === endHour && currentMinute < endMinute))
  ) {
    // We are in scheduled timeframe
    return true;
  }
  if (
    // End is before start (e.g. 17:00-09:00)
    endBeforeStart &&
    // Check if past start
    (currentHour > startHour ||
      (currentHour === startHour && currentMinute >= startMinute) ||
      // Check that we are not past end
      currentHour < endHour ||
      (currentHour === endHour && currentMinute < endMinute))
  ) {
    // We are also in scheduled timeframe
    return true;
  }

  // We are not in scheduled timeframe
  return false;
}