hippofish/packages/client/src/scripts/time.ts

const dateTimeIntervals = {
	day: 86400000,
	hour: 3600000,
	ms: 1,
};

export function dateUTC(time: number[]): Date {
	const d =
		time.length === 2
			? Date.UTC(time[0], time[1])
			: time.length === 3
			  ? Date.UTC(time[0], time[1], time[2])
			  : time.length === 4
				  ? Date.UTC(time[0], time[1], time[2], time[3])
				  : time.length === 5
					  ? Date.UTC(time[0], time[1], time[2], time[3], time[4])
					  : time.length === 6
						  ? Date.UTC(time[0], time[1], time[2], time[3], time[4], time[5])
						  : time.length === 7
							  ? Date.UTC(
										time[0],
										time[1],
										time[2],
										time[3],
										time[4],
										time[5],
										time[6],
								  )
							  : null;

	if (!d) throw "wrong number of arguments";

	return new Date(d);
}

export function isTimeSame(a: Date, b: Date): boolean {
	return a.getTime() === b.getTime();
}

export function isTimeBefore(a: Date, b: Date): boolean {
	return a.getTime() - b.getTime() < 0;
}

export function isTimeAfter(a: Date, b: Date): boolean {
	return a.getTime() - b.getTime() > 0;
}

export function addTime(
	x: Date,
	value: number,
	span: keyof typeof dateTimeIntervals = "ms",
): Date {
	return new Date(x.getTime() + value * dateTimeIntervals[span]);
}

export function subtractTime(
	x: Date,
	value: number,
	span: keyof typeof dateTimeIntervals = "ms",
): Date {
	return new Date(x.getTime() - value * dateTimeIntervals[span]);
}