hippofish/src/prelude/time.ts
2020-03-07 11:23:31 +09:00

29 lines
811 B
TypeScript

const dateTimeIntervals = {
'day': 86400000,
'hour': 3600000,
'ms': 1,
};
export function dateUTC(time: number[]): Date {
return new Date(Date.UTC(...time));
}
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]));
}