dot-beat-time
Version:
Convert legacy time to decimal internet time, or beats.
24 lines (23 loc) • 767 B
JavaScript
// Math for calculating beats taken from the `beats` rust crate: https://docs.rs/beats
function format(beats, long) {
const beatsFixed = long ? beats.toFixed(2) : Math.floor(beats).toFixed(0);
if (beats < 10) {
return `@00${beatsFixed}`;
}
else if (beats < 100) {
return `@0${beatsFixed}`;
}
return `@${beatsFixed}`;
}
function wrap(beats) {
return beats >= 1000 ? Math.abs(beats - 1000) : beats;
}
export function fromDate(date, long) {
const seconds = date.getUTCSeconds() +
(date.getUTCMinutes() * 60 + (date.getUTCHours() + 1) * 3600);
const beats = Math.round((seconds / 86.4) * 100) / 100;
return format(wrap(beats), !!long);
}
export function now(long) {
return fromDate(new Date(), long);
}