detect outdated ID generation configuration

Although these are configurable, there seems to be no benefit of being
able to configure these. The expected use of configuration methods other
than "aid" is expected to be low.

.config/example.yml

@@ -71,24 +71,6 @@ redis:
 #  user: 
 #  pass: 
 
-#   ┌───────────────┐
-#───┘ ID generation └───────────────────────────────────────────
-
-# You can select the ID generation method.
-# You don't usually need to change this setting, but you can
-# change it according to your preferences.
-
-# Available methods:
-# aid ... Short, Millisecond accuracy
-# meid ... Similar to ObjectID, Millisecond accuracy
-# ulid ... Millisecond accuracy
-# objectid ... This is left for backward compatibility
-
-# ONCE YOU HAVE STARTED THE INSTANCE, DO NOT CHANGE THE
-# ID SETTINGS AFTER THAT!
-
-id: 'aid'
-
 #   ┌─────────────────────┐
 #───┘ Other configuration └─────────────────────────────────────
 

packages/backend/package.json

@@ -111,7 +111,6 @@
 		"tsconfig-paths": "4.0.0",
 		"twemoji-parser": "14.0.0",
 		"typeorm": "0.3.6",
-		"ulid": "2.3.0",
 		"unzipper": "0.10.11",
 		"uuid": "8.3.2",
 		"web-push": "3.5.0",

packages/backend/src/config/load.ts

@@ -28,6 +28,8 @@ export default function load() {
 	const clientManifest = JSON.parse(fs.readFileSync(`${_dirname}/../../../../built/_client_dist_/manifest.json`, 'utf-8'));
 	const config = yaml.load(fs.readFileSync(path, 'utf-8')) as Source;
 
+	if (config.id && config.id !== 'aid') throw new Error('Unsupported ID algorithm. Only "aid" is supported.');
+
 	const mixin = {} as Mixin;
 
 	const url = tryCreateUrl(config.url);

packages/backend/src/misc/gen-id.ts

@@ -1,21 +1,23 @@
-import { ulid } from 'ulid';
-import { genAid } from './id/aid.js';
-import { genMeid } from './id/meid.js';
-import { genMeidg } from './id/meidg.js';
-import { genObjectId } from './id/object-id.js';
-import config from '@/config/index.js';
+import * as crypto from 'node:crypto';
 
-const metohd = config.id.toLowerCase();
+// AID generation
+// 8 chars: milliseconds elapsed since 2000-01-01 00:00:00.000Z encoded as base36
+// + 2 random chars
+
+const TIME2000 = 946684800000;
+let counter = crypto.randomBytes(2).readUInt16LE(0);
 
 export function genId(date?: Date): string {
 	if (!date || (date > new Date())) date = new Date();
 
-	switch (metohd) {
-		case 'aid': return genAid(date);
-		case 'meid': return genMeid(date);
-		case 'meidg': return genMeidg(date);
-		case 'ulid': return ulid(date.getTime());
-		case 'objectid': return genObjectId(date);
-		default: throw new Error('unrecognized id generation method');
-	}
+	let t = date.getTime();
+	t -= TIME2000;
+	if (t < 0) t = 0;
+	if (isNaN(t)) throw 'Failed to create AID: Invalid Date';
+	const time = t.toString(36).padStart(8, '0');
+
+	counter++;
+	const noise = counter.toString(36).padStart(2, '0').slice(-2);
+
+	return time + noise;
 }

packages/backend/src/misc/id/aid.ts

@@ -1,25 +0,0 @@
-// AID
-// 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]
-
-import * as crypto from 'node:crypto';
-
-const TIME2000 = 946684800000;
-let counter = crypto.randomBytes(2).readUInt16LE(0);
-
-function getTime(time: number) {
-	time = time - TIME2000;
-	if (time < 0) time = 0;
-
-	return time.toString(36).padStart(8, '0');
-}
-
-function getNoise() {
-	return counter.toString(36).padStart(2, '0').slice(-2);
-}
-
-export function genAid(date: Date): string {
-	const t = date.getTime();
-	if (isNaN(t)) throw 'Failed to create AID: Invalid Date';
-	counter++;
-	return getTime(t) + getNoise();
-}

packages/backend/src/misc/id/meid.ts

@@ -1,26 +0,0 @@
-const CHARS = '0123456789abcdef';
-
-function getTime(time: number) {
-	if (time < 0) time = 0;
-	if (time === 0) {
-		return CHARS[0];
-	}
-
-	time += 0x800000000000;
-
-	return time.toString(16).padStart(12, CHARS[0]);
-}
-
-function getRandom() {
-	let str = '';
-
-	for (let i = 0; i < 12; i++) {
-		str += CHARS[Math.floor(Math.random() * CHARS.length)];
-	}
-
-	return str;
-}
-
-export function genMeid(date: Date): string {
-	return getTime(date.getTime()) + getRandom();
-}

packages/backend/src/misc/id/meidg.ts

@@ -1,28 +0,0 @@
-const CHARS = '0123456789abcdef';
-
-//  4bit Fixed hex value 'g'
-// 44bit UNIX Time ms in Hex
-// 48bit Random value in Hex
-
-function getTime(time: number) {
-	if (time < 0) time = 0;
-	if (time === 0) {
-		return CHARS[0];
-	}
-
-	return time.toString(16).padStart(11, CHARS[0]);
-}
-
-function getRandom() {
-	let str = '';
-
-	for (let i = 0; i < 12; i++) {
-		str += CHARS[Math.floor(Math.random() * CHARS.length)];
-	}
-
-	return str;
-}
-
-export function genMeidg(date: Date): string {
-	return 'g' + getTime(date.getTime()) + getRandom();
-}

packages/backend/src/misc/id/object-id.ts

@@ -1,26 +0,0 @@
-const CHARS = '0123456789abcdef';
-
-function getTime(time: number) {
-	if (time < 0) time = 0;
-	if (time === 0) {
-		return CHARS[0];
-	}
-
-	time = Math.floor(time / 1000);
-
-	return time.toString(16).padStart(8, CHARS[0]);
-}
-
-function getRandom() {
-	let str = '';
-
-	for (let i = 0; i < 16; i++) {
-		str += CHARS[Math.floor(Math.random() * CHARS.length)];
-	}
-
-	return str;
-}
-
-export function genObjectId(date: Date): string {
-	return getTime(date.getTime()) + getRandom();
-}