/* * SPDX-FileCopyrightText: syuilo and other misskey contributors * SPDX-License-Identifier: AGPL-3.0-only */ // AIDX // 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4の[個体ID] + 長さ4の[カウンタ] // (c) mei23 // https://misskey.m544.net/notes/71899acdcc9859ec5708ac24 import { customAlphabet } from 'nanoid'; export const aidxRegExp = /^[0-9a-z]{16}$/; const TIME2000 = 946684800000; const TIME_LENGTH = 8; const NODE_LENGTH = 4; const NOISE_LENGTH = 4; const nodeId = customAlphabet('0123456789abcdefghijklmnopqrstuvwxyz', NODE_LENGTH)(); let counter = 0; function getTime(time: number): string { time = time - TIME2000; if (time < 0) time = 0; return time.toString(36).padStart(TIME_LENGTH, '0').slice(-TIME_LENGTH); } function getNoise(): string { return counter.toString(36).padStart(NOISE_LENGTH, '0').slice(-NOISE_LENGTH); } export function genAidx(t: number): string { if (isNaN(t)) throw new Error('Failed to create AIDX: Invalid Date'); counter++; return getTime(t) + nodeId + getNoise(); } export function parseAidx(id: string): { date: Date; } { const time = parseInt(id.slice(0, TIME_LENGTH), 36) + TIME2000; return { date: new Date(time) }; }