egirlskey/src/prelude/time.ts
Satsuki Yanagi 88f5e8e8e2 Bye moment from package.json (#5215)
* Bye moment from package.json

* Use Mapped types for argument type definition
2019-07-25 01:36:48 +09:00

31 lines
903 B
TypeScript

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 {
return (a.getTime() - b.getTime()) === 0;
}
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]));
}