75 lines
2 KiB
TypeScript
75 lines
2 KiB
TypeScript
function removeTime(date: Date): Date {
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const dt = date.getTimezoneOffset()*60e3;
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return new Date(new Date(date.valueOf()-dt).setUTCHours(0, 0, 0, 0));
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}
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export class FullDate {
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private _date: Date;
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constructor();
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constructor(copyFrom: FullDate);
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constructor(date: Date);
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constructor(s: string);
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constructor(n: number);
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constructor(y: number, m: number, d?: number);
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constructor(...argv: [any?, number?, number?]) {
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this._date = removeTime((() => {
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if (argv.length == 0) return new Date();
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if (argv.length == 1) {
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const arg = argv[0];
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if (arg instanceof FullDate) return new Date(+arg);
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if (arg instanceof Date) return arg;
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if (typeof arg === 'string') {
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const tokens = /^(\d+)-(\d+)-(\d+)$/g.exec(arg)?.slice(1, 4);
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if (tokens) return new Date(+tokens[0], +tokens[1]-1, +tokens[2]);
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}
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return new Date(arg);
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}
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return new Date(argv[0], (argv[1] ?? 1)-1, argv[2] ?? 1);
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})());
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}
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toString(): string {
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const d = this._date;
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const f = (s: any) => ('0'+s).slice(-2);
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return `${d.getUTCFullYear()}-${
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f(d.getUTCMonth()+1)}-${f(d.getUTCDate())}`;
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}
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toJSON(): string {
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return this.toString();
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}
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valueOf(): number {
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return this._date.valueOf();
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}
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// getter
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get date(): Date {
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return new Date(this._date);
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}
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get year(): number {
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return this._date.getUTCFullYear();
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}
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get month(): number {
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return this._date.getUTCMonth()+1;
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}
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get day(): number {
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return this._date.getUTCDate();
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}
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get dayOfWeek(): number {
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return this._date.getUTCDay();
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}
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// setter
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set year(val: number) {
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this._date.setUTCFullYear(val);
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}
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set month(val: number) {
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this._date.setUTCMonth(val-1);
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}
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set day(val: number) {
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this._date.setUTCDate(val);
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}
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// func
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advance(period: number): FullDate {
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return new FullDate(this._date.valueOf()+period*86400e3);
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}
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distanceFrom(d0: FullDate): number {
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return (this.valueOf()-d0.valueOf())/86400e3;
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}
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}
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