const HOUR = 60 * 60;
const MINUTE = 60;

export function formatDuration(float_s: number) {
	const hours = Math.floor(float_s / HOUR);
	float_s = float_s - hours * HOUR;
	const minutes = Math.floor(float_s / MINUTE);
	const seconds = float_s - minutes * MINUTE;
	return `${twoDigits(hours)}:${twoDigits(minutes)}:${twoDigits(seconds, 5)}`;
}

export function twoDigits(number: number, decimal = 0) {
	let [int, dec] = number.toFixed(decimal).split(".");
	dec = dec || "";
	if (dec == "") {
		return int.padStart(2, "0");
	} else {
		return int.padStart(2, "0") + "." + dec;
	}
}

export function* makeIDGen(first = 1): Generator<number, number> {
	let i = first;
	while (true) {
		yield i;
		i++;
	}
}