From ca00a08e6e8ad8636b2002bf8fabcf66d9566015 Mon Sep 17 00:00:00 2001 From: syuilo Date: Wed, 6 Sep 2023 18:33:51 +0900 Subject: feat: introduce aidx and make it default Co-Authored-By: MeiMei <30769358+mei23@users.noreply.github.com> --- packages/backend/src/misc/id/aidx.ts | 44 ++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 packages/backend/src/misc/id/aidx.ts (limited to 'packages/backend/src/misc') diff --git a/packages/backend/src/misc/id/aidx.ts b/packages/backend/src/misc/id/aidx.ts new file mode 100644 index 0000000000..5b031ea4c0 --- /dev/null +++ b/packages/backend/src/misc/id/aidx.ts @@ -0,0 +1,44 @@ +/* + * 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(date: Date): string { + const t = date.getTime(); + 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) }; +} -- cgit v1.2.3-freya