33 lines
859 B
TypeScript
33 lines
859 B
TypeScript
// AID
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// 長さ8の[2000年1月1日からの経過ミリ秒をbase36でエンコードしたもの] + 長さ2の[ノイズ文字列]
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import * as crypto from 'node:crypto';
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export const aidRegExp = /^[0-9a-z]{10}$/;
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const TIME2000 = 946684800000;
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let counter = crypto.randomBytes(2).readUInt16LE(0);
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function getTime(time: number): string {
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time = time - TIME2000;
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if (time < 0) time = 0;
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return time.toString(36).padStart(8, '0');
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}
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function getNoise(): string {
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return counter.toString(36).padStart(2, '0').slice(-2);
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}
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export function genAid(date: Date): string {
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const t = date.getTime();
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if (isNaN(t)) throw 'Failed to create AID: Invalid Date';
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counter++;
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return getTime(t) + getNoise();
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}
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export function parseAid(id: string): { date: Date; } {
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const time = parseInt(id.slice(0, 8), 36) + TIME2000;
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return { date: new Date(time) };
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}
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