Function quietHoursDisplay

site/src/utils/schedule.tsx:246–291

(
	browserLocale: string,
	time: string,
	tz: string,
	now: Date | undefined,
)

};

export const quietHoursDisplay = (
	browserLocale: string,
	time: string,
	tz: string,
	now: Date | undefined,
): string => {
	if (!validTime(time)) {
		return "Invalid time";
	}

	// The cron-parser package doesn't accept a timezone in the cron string, but
	// accepts it as an option.
	const cron = timeToCron(time);
	const parsed = cronParser.parseExpression(cron, {
		currentDate: now,
		iterator: false,
		utc: false,
		tz,
	});

	const today = dayjs(now).tz(tz);
	const day = dayjs(parsed.next().toDate()).tz(tz);

	const formattedTime = new Intl.DateTimeFormat(browserLocale, {
		hour: "numeric",
		minute: "numeric",
		timeZone: tz,
	}).format(day.toDate());

	let display = formattedTime;

	if (day.isSame(today, "day")) {
		display += " today";
	} else if (day.isSame(today.add(1, "day"), "day")) {
		display += " tomorrow";
	} else {
		// This case will rarely ever be hit, as we're dealing with only times and
		// not dates, but it can be hit due to mismatched browser timezone to cron
		// timezone or due to daylight savings changes.
		display += ` on ${day.format("dddd, MMMM D")}`;
	}

	display += ` (${day.from(today)}) in ${tz}`;

	return display;
};

export type TemplateAutostartRequirementDaysValue =
	| "monday"