misskey/src/prelude/time.ts

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const dateTimeIntervals = {
'days': 86400000,
'hours': 3600000,
};
export function DateUTC(time: number[]): Date {
const r = new Date(0);
r.setUTCFullYear(time[0], time[1], time[2]);
if (time[3]) r.setUTCHours(time[3], ...time.slice(4));
return r;
}
export function isTimeSame(a: Date, b: Date): boolean {
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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 addTimespan(x: Date, value: number, span: keyof typeof dateTimeIntervals): Date {
return new Date(x.getTime() + (value * dateTimeIntervals[span]));
}
export function subtractTimespan(x: Date, value: number, span: keyof typeof dateTimeIntervals): Date {
return new Date(x.getTime() - (value * dateTimeIntervals[span]));
}