refactoring

Resolve #7779

packages/backend/src/boot/index.ts

@@ -0,0 +1,79 @@
+import * as cluster from 'cluster';
+import * as chalk from 'chalk';
+import Xev from 'xev';
+
+import Logger from '@/services/logger';
+import { envOption } from '../env';
+
+// for typeorm
+import 'reflect-metadata';
+import { masterMain } from './master';
+import { workerMain } from './worker';
+
+const logger = new Logger('core', 'cyan');
+const clusterLogger = logger.createSubLogger('cluster', 'orange', false);
+const ev = new Xev();
+
+/**
+ * Init process
+ */
+export default async function() {
+	process.title = `Misskey (${cluster.isPrimary ? 'master' : 'worker'})`;
+
+	if (cluster.isPrimary || envOption.disableClustering) {
+		await masterMain();
+
+		if (cluster.isPrimary) {
+			ev.mount();
+		}
+	}
+
+	if (cluster.isWorker || envOption.disableClustering) {
+		await workerMain();
+	}
+
+	// ユニットテスト時にMisskeyが子プロセスで起動された時のため
+	// それ以外のときは process.send は使えないので弾く
+	if (process.send) {
+		process.send('ok');
+	}
+}
+
+//#region Events
+
+// Listen new workers
+cluster.on('fork', worker => {
+	clusterLogger.debug(`Process forked: [${worker.id}]`);
+});
+
+// Listen online workers
+cluster.on('online', worker => {
+	clusterLogger.debug(`Process is now online: [${worker.id}]`);
+});
+
+// Listen for dying workers
+cluster.on('exit', worker => {
+	// Replace the dead worker,
+	// we're not sentimental
+	clusterLogger.error(chalk.red(`[${worker.id}] died :(`));
+	cluster.fork();
+});
+
+// Display detail of unhandled promise rejection
+if (!envOption.quiet) {
+	process.on('unhandledRejection', console.dir);
+}
+
+// Display detail of uncaught exception
+process.on('uncaughtException', err => {
+	try {
+		logger.error(err);
+	} catch { }
+});
+
+// Dying away...
+process.on('exit', code => {
+	logger.info(`The process is going to exit with code ${code}`);
+});
+
+//#endregion

packages/backend/src/boot/master.ts

@@ -0,0 +1,194 @@
+import * as fs from 'fs';
+import { fileURLToPath } from 'url';
+import { dirname } from 'path';
+import * as os from 'os';
+import * as cluster from 'cluster';
+import * as chalk from 'chalk';
+import * as portscanner from 'portscanner';
+import { getConnection } from 'typeorm';
+
+import Logger from '@/services/logger';
+import loadConfig from '@/config/load';
+import { Config } from '@/config/types';
+import { lessThan } from '@/prelude/array';
+import { envOption } from '../env';
+import { showMachineInfo } from '@/misc/show-machine-info';
+import { initDb } from '../db/postgre';
+
+//const _filename = fileURLToPath(import.meta.url);
+const _filename = __filename;
+const _dirname = dirname(_filename);
+
+const meta = JSON.parse(fs.readFileSync(`${_dirname}/../../../../built/meta.json`, 'utf-8'));
+
+const logger = new Logger('core', 'cyan');
+const bootLogger = logger.createSubLogger('boot', 'magenta', false);
+
+function greet() {
+	if (!envOption.quiet) {
+		//#region Misskey logo
+		const v = `v${meta.version}`;
+		console.log('  _____ _         _           ');
+		console.log(' |     |_|___ ___| |_ ___ _ _ ');
+		console.log(' | | | | |_ -|_ -| \'_| -_| | |');
+		console.log(' |_|_|_|_|___|___|_,_|___|_  |');
+		console.log(' ' + chalk.gray(v) + ('                        |___|\n'.substr(v.length)));
+		//#endregion
+
+		console.log(' Misskey is an open-source decentralized microblogging platform.');
+		console.log(chalk.keyword('orange')(' If you like Misskey, please donate to support development. https://www.patreon.com/syuilo'));
+
+		console.log('');
+		console.log(chalk`--- ${os.hostname()} {gray (PID: ${process.pid.toString()})} ---`);
+	}
+
+	bootLogger.info('Welcome to Misskey!');
+	bootLogger.info(`Misskey v${meta.version}`, null, true);
+}
+
+function isRoot() {
+	// maybe process.getuid will be undefined under not POSIX environment (e.g. Windows)
+	return process.getuid != null && process.getuid() === 0;
+}
+
+/**
+ * Init master process
+ */
+export async function masterMain() {
+	let config!: Config;
+
+	// initialize app
+	try {
+		greet();
+		showEnvironment();
+		await showMachineInfo(bootLogger);
+		showNodejsVersion();
+		config = loadConfigBoot();
+		await connectDb();
+		await validatePort(config);
+	} catch (e) {
+		bootLogger.error('Fatal error occurred during initialization', null, true);
+		process.exit(1);
+	}
+
+	bootLogger.succ('Misskey initialized');
+
+	if (!envOption.disableClustering) {
+		await spawnWorkers(config.clusterLimit);
+	}
+
+	bootLogger.succ(`Now listening on port ${config.port} on ${config.url}`, null, true);
+
+	if (!envOption.noDaemons) {
+		require('../daemons/server-stats').default();
+		require('../daemons/queue-stats').default();
+		require('../daemons/janitor').default();
+	}
+}
+
+const runningNodejsVersion = process.version.slice(1).split('.').map(x => parseInt(x, 10));
+const requiredNodejsVersion = [11, 7, 0];
+const satisfyNodejsVersion = !lessThan(runningNodejsVersion, requiredNodejsVersion);
+
+function showEnvironment(): void {
+	const env = process.env.NODE_ENV;
+	const logger = bootLogger.createSubLogger('env');
+	logger.info(typeof env === 'undefined' ? 'NODE_ENV is not set' : `NODE_ENV: ${env}`);
+
+	if (env !== 'production') {
+		logger.warn('The environment is not in production mode.');
+		logger.warn('DO NOT USE FOR PRODUCTION PURPOSE!', null, true);
+	}
+
+	logger.info(`You ${isRoot() ? '' : 'do not '}have root privileges`);
+}
+
+function showNodejsVersion(): void {
+	const nodejsLogger = bootLogger.createSubLogger('nodejs');
+
+	nodejsLogger.info(`Version ${runningNodejsVersion.join('.')}`);
+
+	if (!satisfyNodejsVersion) {
+		nodejsLogger.error(`Node.js version is less than ${requiredNodejsVersion.join('.')}. Please upgrade it.`, null, true);
+		process.exit(1);
+	}
+}
+
+function loadConfigBoot(): Config {
+	const configLogger = bootLogger.createSubLogger('config');
+	let config;
+
+	try {
+		config = loadConfig();
+	} catch (exception) {
+		if (typeof exception === 'string') {
+			configLogger.error(exception);
+			process.exit(1);
+		}
+		if (exception.code === 'ENOENT') {
+			configLogger.error('Configuration file not found', null, true);
+			process.exit(1);
+		}
+		throw exception;
+	}
+
+	configLogger.succ('Loaded');
+
+	return config;
+}
+
+async function connectDb(): Promise<void> {
+	const dbLogger = bootLogger.createSubLogger('db');
+
+	// Try to connect to DB
+	try {
+		dbLogger.info('Connecting...');
+		await initDb();
+		const v = await getConnection().query('SHOW server_version').then(x => x[0].server_version);
+		dbLogger.succ(`Connected: v${v}`);
+	} catch (e) {
+		dbLogger.error('Cannot connect', null, true);
+		dbLogger.error(e);
+		process.exit(1);
+	}
+}
+
+async function validatePort(config: Config): Promise<void> {
+	const isWellKnownPort = (port: number) => port < 1024;
+
+	async function isPortAvailable(port: number): Promise<boolean> {
+		return await portscanner.checkPortStatus(port, '127.0.0.1') === 'closed';
+	}
+
+	if (config.port == null || Number.isNaN(config.port)) {
+		bootLogger.error('The port is not configured. Please configure port.', null, true);
+		process.exit(1);
+	}
+
+	if (process.platform === 'linux' && isWellKnownPort(config.port) && !isRoot()) {
+		bootLogger.error('You need root privileges to listen on well-known port on Linux', null, true);
+		process.exit(1);
+	}
+
+	if (!await isPortAvailable(config.port)) {
+		bootLogger.error(`Port ${config.port} is already in use`, null, true);
+		process.exit(1);
+	}
+}
+
+async function spawnWorkers(limit: number = 1) {
+	const workers = Math.min(limit, os.cpus().length);
+	bootLogger.info(`Starting ${workers} worker${workers === 1 ? '' : 's'}...`);
+	await Promise.all([...Array(workers)].map(spawnWorker));
+	bootLogger.succ('All workers started');
+}
+
+function spawnWorker(): Promise<void> {
+	return new Promise(res => {
+		const worker = cluster.fork();
+		worker.on('message', message => {
+			if (message !== 'ready') return;
+			res();
+		});
+	});
+}

packages/backend/src/boot/worker.ts

@@ -0,0 +1,20 @@
+import * as cluster from 'cluster';
+import { initDb } from '../db/postgre';
+
+/**
+ * Init worker process
+ */
+export async function workerMain() {
+	await initDb();
+
+	// start server
+	await require('../server').default();
+
+	// start job queue
+	require('../queue').default();
+
+	if (cluster.isWorker) {
+		// Send a 'ready' message to parent process
+		process.send!('ready');
+	}
+}

packages/backend/src/config/index.ts

@@ -0,0 +1,3 @@
+import load from './load';
+
+export default load();

packages/backend/src/config/load.ts

@@ -0,0 +1,61 @@
+/**
+ * Config loader
+ */
+
+import * as fs from 'fs';
+import { fileURLToPath } from 'url';
+import { dirname } from 'path';
+import * as yaml from 'js-yaml';
+import { Source, Mixin } from './types';
+
+//const _filename = fileURLToPath(import.meta.url);
+const _filename = __filename;
+const _dirname = dirname(_filename);
+
+/**
+ * Path of configuration directory
+ */
+const dir = `${_dirname}/../../../../.config`;
+
+/**
+ * Path of configuration file
+ */
+const path = process.env.NODE_ENV === 'test'
+	? `${dir}/test.yml`
+	: `${dir}/default.yml`;
+
+export default function load() {
+	const meta = JSON.parse(fs.readFileSync(`${_dirname}/../../../../built/meta.json`, 'utf-8'));
+	const config = yaml.load(fs.readFileSync(path, 'utf-8')) as Source;
+
+	const mixin = {} as Mixin;
+
+	const url = tryCreateUrl(config.url);
+
+	config.url = url.origin;
+
+	config.port = config.port || parseInt(process.env.PORT || '', 10);
+
+	mixin.version = meta.version;
+	mixin.host = url.host;
+	mixin.hostname = url.hostname;
+	mixin.scheme = url.protocol.replace(/:$/, '');
+	mixin.wsScheme = mixin.scheme.replace('http', 'ws');
+	mixin.wsUrl = `${mixin.wsScheme}://${mixin.host}`;
+	mixin.apiUrl = `${mixin.scheme}://${mixin.host}/api`;
+	mixin.authUrl = `${mixin.scheme}://${mixin.host}/auth`;
+	mixin.driveUrl = `${mixin.scheme}://${mixin.host}/files`;
+	mixin.userAgent = `Misskey/${meta.version} (${config.url})`;
+
+	if (!config.redis.prefix) config.redis.prefix = mixin.host;
+
+	return Object.assign(config, mixin);
+}
+
+function tryCreateUrl(url: string) {
+	try {
+		return new URL(url);
+	} catch (e) {
+		throw `url="${url}" is not a valid URL.`;
+	}
+}

packages/backend/src/config/types.ts

@@ -0,0 +1,85 @@
+/**
+ * ユーザーが設定する必要のある情報
+ */
+export type Source = {
+	repository_url?: string;
+	feedback_url?: string;
+	url: string;
+	port: number;
+	https?: { [x: string]: string };
+	disableHsts?: boolean;
+	db: {
+		host: string;
+		port: number;
+		db: string;
+		user: string;
+		pass: string;
+		disableCache?: boolean;
+		extra?: { [x: string]: string };
+	};
+	redis: {
+		host: string;
+		port: number;
+		pass: string;
+		db?: number;
+		prefix?: string;
+	};
+	elasticsearch: {
+		host: string;
+		port: number;
+		ssl?: boolean;
+		user?: string;
+		pass?: string;
+		index?: string;
+	};
+
+	proxy?: string;
+	proxySmtp?: string;
+	proxyBypassHosts?: string[];
+
+	allowedPrivateNetworks?: string[];
+
+	maxFileSize?: number;
+
+	accesslog?: string;
+
+	clusterLimit?: number;
+
+	id: string;
+
+	outgoingAddressFamily?: 'ipv4' | 'ipv6' | 'dual';
+
+	deliverJobConcurrency?: number;
+	inboxJobConcurrency?: number;
+	deliverJobPerSec?: number;
+	inboxJobPerSec?: number;
+	deliverJobMaxAttempts?: number;
+	inboxJobMaxAttempts?: number;
+
+	syslog: {
+		host: string;
+		port: number;
+	};
+
+	mediaProxy?: string;
+
+	signToActivityPubGet?: boolean;
+};
+
+/**
+ * Misskeyが自動的に(ユーザーが設定した情報から推論して)設定する情報
+ */
+export type Mixin = {
+	version: string;
+	host: string;
+	hostname: string;
+	scheme: string;
+	wsScheme: string;
+	apiUrl: string;
+	wsUrl: string;
+	authUrl: string;
+	driveUrl: string;
+	userAgent: string;
+};
+
+export type Config = Source & Mixin;

packages/backend/src/const.ts

@@ -0,0 +1,2 @@
+export const USER_ONLINE_THRESHOLD = 1000 * 60 * 10; // 10min
+export const USER_ACTIVE_THRESHOLD = 1000 * 60 * 60 * 24 * 3; // 3days

packages/backend/src/daemons/janitor.ts

@@ -0,0 +1,20 @@
+// TODO: 消したい
+
+const interval = 30 * 60 * 1000;
+import { AttestationChallenges } from '@/models/index';
+import { LessThan } from 'typeorm';
+
+/**
+ * Clean up database occasionally
+ */
+export default function() {
+	async function tick() {
+		await AttestationChallenges.delete({
+			createdAt: LessThan(new Date(new Date().getTime() - 5 * 60 * 1000))
+		});
+	}
+
+	tick();
+
+	setInterval(tick, interval);
+}

packages/backend/src/daemons/queue-stats.ts

@@ -0,0 +1,60 @@
+import Xev from 'xev';
+import { deliverQueue, inboxQueue } from '../queue/queues';
+
+const ev = new Xev();
+
+const interval = 10000;
+
+/**
+ * Report queue stats regularly
+ */
+export default function() {
+	const log = [] as any[];
+
+	ev.on('requestQueueStatsLog', x => {
+		ev.emit(`queueStatsLog:${x.id}`, log.slice(0, x.length || 50));
+	});
+
+	let activeDeliverJobs = 0;
+	let activeInboxJobs = 0;
+
+	deliverQueue.on('global:active', () => {
+		activeDeliverJobs++;
+	});
+
+	inboxQueue.on('global:active', () => {
+		activeInboxJobs++;
+	});
+
+	async function tick() {
+		const deliverJobCounts = await deliverQueue.getJobCounts();
+		const inboxJobCounts = await inboxQueue.getJobCounts();
+
+		const stats = {
+			deliver: {
+				activeSincePrevTick: activeDeliverJobs,
+				active: deliverJobCounts.active,
+				waiting: deliverJobCounts.waiting,
+				delayed: deliverJobCounts.delayed
+			},
+			inbox: {
+				activeSincePrevTick: activeInboxJobs,
+				active: inboxJobCounts.active,
+				waiting: inboxJobCounts.waiting,
+				delayed: inboxJobCounts.delayed
+			},
+		};
+
+		ev.emit('queueStats', stats);
+
+		log.unshift(stats);
+		if (log.length > 200) log.pop();
+
+		activeDeliverJobs = 0;
+		activeInboxJobs = 0;
+	}
+
+	tick();
+
+	setInterval(tick, interval);
+}

packages/backend/src/daemons/server-stats.ts

@@ -0,0 +1,79 @@
+import * as si from 'systeminformation';
+import Xev from 'xev';
+import * as osUtils from 'os-utils';
+
+const ev = new Xev();
+
+const interval = 2000;
+
+const roundCpu = (num: number) => Math.round(num * 1000) / 1000;
+const round = (num: number) => Math.round(num * 10) / 10;
+
+/**
+ * Report server stats regularly
+ */
+export default function() {
+	const log = [] as any[];
+
+	ev.on('requestServerStatsLog', x => {
+		ev.emit(`serverStatsLog:${x.id}`, log.slice(0, x.length || 50));
+	});
+
+	async function tick() {
+		const cpu = await cpuUsage();
+		const memStats = await mem();
+		const netStats = await net();
+		const fsStats = await fs();
+
+		const stats = {
+			cpu: roundCpu(cpu),
+			mem: {
+				used: round(memStats.used - memStats.buffers - memStats.cached),
+				active: round(memStats.active),
+			},
+			net: {
+				rx: round(Math.max(0, netStats.rx_sec)),
+				tx: round(Math.max(0, netStats.tx_sec)),
+			},
+			fs: {
+				r: round(Math.max(0, fsStats.rIO_sec)),
+				w: round(Math.max(0, fsStats.wIO_sec)),
+			}
+		};
+		ev.emit('serverStats', stats);
+		log.unshift(stats);
+		if (log.length > 200) log.pop();
+	}
+
+	tick();
+
+	setInterval(tick, interval);
+}
+
+// CPU STAT
+function cpuUsage() {
+	return new Promise((res, rej) => {
+		osUtils.cpuUsage((cpuUsage: number) => {
+			res(cpuUsage);
+		});
+	});
+}
+
+// MEMORY STAT
+async function mem() {
+	const data = await si.mem();
+	return data;
+}
+
+// NETWORK STAT
+async function net() {
+	const iface = await si.networkInterfaceDefault();
+	const data = await si.networkStats(iface);
+	return data[0];
+}
+
+// FS STAT
+async function fs() {
+	const data = await si.disksIO().catch(() => ({ rIO_sec: 0, wIO_sec: 0 }));
+	return data || { rIO_sec: 0, wIO_sec: 0 };
+}

packages/backend/src/db/elasticsearch.ts

@@ -0,0 +1,56 @@
+import * as elasticsearch from '@elastic/elasticsearch';
+import config from '@/config/index';
+
+const index = {
+	settings: {
+		analysis: {
+			analyzer: {
+				ngram: {
+					tokenizer: 'ngram'
+				}
+			}
+		}
+	},
+	mappings: {
+		properties: {
+			text: {
+				type: 'text',
+				index: true,
+				analyzer: 'ngram',
+			},
+			userId: {
+				type: 'keyword',
+				index: true,
+			},
+			userHost: {
+				type: 'keyword',
+				index: true,
+			}
+		}
+	}
+};
+
+// Init ElasticSearch connection
+const client = config.elasticsearch ? new elasticsearch.Client({
+	node: `${config.elasticsearch.ssl ? 'https://' : 'http://'}${config.elasticsearch.host}:${config.elasticsearch.port}`,
+	auth: (config.elasticsearch.user && config.elasticsearch.pass) ? {
+		username: config.elasticsearch.user,
+		password: config.elasticsearch.pass
+	} : undefined,
+	pingTimeout: 30000
+}) : null;
+
+if (client) {
+	client.indices.exists({
+		index: config.elasticsearch.index || 'misskey_note',
+	}).then(exist => {
+		if (!exist.body) {
+			client.indices.create({
+				index: config.elasticsearch.index || 'misskey_note',
+				body: index
+			});
+		}
+	});
+}
+
+export default client;

packages/backend/src/db/logger.ts

@@ -0,0 +1,3 @@
+import Logger from '@/services/logger';
+
+export const dbLogger = new Logger('db');

packages/backend/src/db/postgre.ts

@@ -0,0 +1,225 @@
+// https://github.com/typeorm/typeorm/issues/2400
+const types = require('pg').types;
+types.setTypeParser(20, Number);
+
+import { createConnection, Logger, getConnection } from 'typeorm';
+import config from '@/config/index';
+import { entities as charts } from '@/services/chart/entities';
+import { dbLogger } from './logger';
+import * as highlight from 'cli-highlight';
+
+import { User } from '@/models/entities/user';
+import { DriveFile } from '@/models/entities/drive-file';
+import { DriveFolder } from '@/models/entities/drive-folder';
+import { AccessToken } from '@/models/entities/access-token';
+import { App } from '@/models/entities/app';
+import { PollVote } from '@/models/entities/poll-vote';
+import { Note } from '@/models/entities/note';
+import { NoteReaction } from '@/models/entities/note-reaction';
+import { NoteWatching } from '@/models/entities/note-watching';
+import { NoteThreadMuting } from '@/models/entities/note-thread-muting';
+import { NoteUnread } from '@/models/entities/note-unread';
+import { Notification } from '@/models/entities/notification';
+import { Meta } from '@/models/entities/meta';
+import { Following } from '@/models/entities/following';
+import { Instance } from '@/models/entities/instance';
+import { Muting } from '@/models/entities/muting';
+import { SwSubscription } from '@/models/entities/sw-subscription';
+import { Blocking } from '@/models/entities/blocking';
+import { UserList } from '@/models/entities/user-list';
+import { UserListJoining } from '@/models/entities/user-list-joining';
+import { UserGroup } from '@/models/entities/user-group';
+import { UserGroupJoining } from '@/models/entities/user-group-joining';
+import { UserGroupInvitation } from '@/models/entities/user-group-invitation';
+import { Hashtag } from '@/models/entities/hashtag';
+import { NoteFavorite } from '@/models/entities/note-favorite';
+import { AbuseUserReport } from '@/models/entities/abuse-user-report';
+import { RegistrationTicket } from '@/models/entities/registration-tickets';
+import { MessagingMessage } from '@/models/entities/messaging-message';
+import { Signin } from '@/models/entities/signin';
+import { AuthSession } from '@/models/entities/auth-session';
+import { FollowRequest } from '@/models/entities/follow-request';
+import { Emoji } from '@/models/entities/emoji';
+import { ReversiGame } from '@/models/entities/games/reversi/game';
+import { ReversiMatching } from '@/models/entities/games/reversi/matching';
+import { UserNotePining } from '@/models/entities/user-note-pining';
+import { Poll } from '@/models/entities/poll';
+import { UserKeypair } from '@/models/entities/user-keypair';
+import { UserPublickey } from '@/models/entities/user-publickey';
+import { UserProfile } from '@/models/entities/user-profile';
+import { UserSecurityKey } from '@/models/entities/user-security-key';
+import { AttestationChallenge } from '@/models/entities/attestation-challenge';
+import { Page } from '@/models/entities/page';
+import { PageLike } from '@/models/entities/page-like';
+import { GalleryPost } from '@/models/entities/gallery-post';
+import { GalleryLike } from '@/models/entities/gallery-like';
+import { ModerationLog } from '@/models/entities/moderation-log';
+import { UsedUsername } from '@/models/entities/used-username';
+import { Announcement } from '@/models/entities/announcement';
+import { AnnouncementRead } from '@/models/entities/announcement-read';
+import { Clip } from '@/models/entities/clip';
+import { ClipNote } from '@/models/entities/clip-note';
+import { Antenna } from '@/models/entities/antenna';
+import { AntennaNote } from '@/models/entities/antenna-note';
+import { PromoNote } from '@/models/entities/promo-note';
+import { PromoRead } from '@/models/entities/promo-read';
+import { envOption } from '../env';
+import { Relay } from '@/models/entities/relay';
+import { MutedNote } from '@/models/entities/muted-note';
+import { Channel } from '@/models/entities/channel';
+import { ChannelFollowing } from '@/models/entities/channel-following';
+import { ChannelNotePining } from '@/models/entities/channel-note-pining';
+import { RegistryItem } from '@/models/entities/registry-item';
+import { Ad } from '@/models/entities/ad';
+import { PasswordResetRequest } from '@/models/entities/password-reset-request';
+import { UserPending } from '@/models/entities/user-pending';
+
+const sqlLogger = dbLogger.createSubLogger('sql', 'white', false);
+
+class MyCustomLogger implements Logger {
+	private highlight(sql: string) {
+		return highlight.highlight(sql, {
+			language: 'sql', ignoreIllegals: true,
+		});
+	}
+
+	public logQuery(query: string, parameters?: any[]) {
+		if (envOption.verbose) {
+			sqlLogger.info(this.highlight(query));
+		}
+	}
+
+	public logQueryError(error: string, query: string, parameters?: any[]) {
+		sqlLogger.error(this.highlight(query));
+	}
+
+	public logQuerySlow(time: number, query: string, parameters?: any[]) {
+		sqlLogger.warn(this.highlight(query));
+	}
+
+	public logSchemaBuild(message: string) {
+		sqlLogger.info(message);
+	}
+
+	public log(message: string) {
+		sqlLogger.info(message);
+	}
+
+	public logMigration(message: string) {
+		sqlLogger.info(message);
+	}
+}
+
+export const entities = [
+	Announcement,
+	AnnouncementRead,
+	Meta,
+	Instance,
+	App,
+	AuthSession,
+	AccessToken,
+	User,
+	UserProfile,
+	UserKeypair,
+	UserPublickey,
+	UserList,
+	UserListJoining,
+	UserGroup,
+	UserGroupJoining,
+	UserGroupInvitation,
+	UserNotePining,
+	UserSecurityKey,
+	UsedUsername,
+	AttestationChallenge,
+	Following,
+	FollowRequest,
+	Muting,
+	Blocking,
+	Note,
+	NoteFavorite,
+	NoteReaction,
+	NoteWatching,
+	NoteThreadMuting,
+	NoteUnread,
+	Page,
+	PageLike,
+	GalleryPost,
+	GalleryLike,
+	DriveFile,
+	DriveFolder,
+	Poll,
+	PollVote,
+	Notification,
+	Emoji,
+	Hashtag,
+	SwSubscription,
+	AbuseUserReport,
+	RegistrationTicket,
+	MessagingMessage,
+	Signin,
+	ModerationLog,
+	Clip,
+	ClipNote,
+	Antenna,
+	AntennaNote,
+	PromoNote,
+	PromoRead,
+	ReversiGame,
+	ReversiMatching,
+	Relay,
+	MutedNote,
+	Channel,
+	ChannelFollowing,
+	ChannelNotePining,
+	RegistryItem,
+	Ad,
+	PasswordResetRequest,
+	UserPending,
+	...charts as any
+];
+
+export function initDb(justBorrow = false, sync = false, forceRecreate = false) {
+	if (!forceRecreate) {
+		try {
+			const conn = getConnection();
+			return Promise.resolve(conn);
+		} catch (e) {}
+	}
+
+	const log = process.env.NODE_ENV != 'production';
+
+	return createConnection({
+		type: 'postgres',
+		host: config.db.host,
+		port: config.db.port,
+		username: config.db.user,
+		password: config.db.pass,
+		database: config.db.db,
+		extra: config.db.extra,
+		synchronize: process.env.NODE_ENV === 'test' || sync,
+		dropSchema: process.env.NODE_ENV === 'test' && !justBorrow,
+		cache: !config.db.disableCache ? {
+			type: 'redis',
+			options: {
+				host: config.redis.host,
+				port: config.redis.port,
+				password: config.redis.pass,
+				prefix: `${config.redis.prefix}:query:`,
+				db: config.redis.db || 0
+			}
+		} : false,
+		logging: log,
+		logger: log ? new MyCustomLogger() : undefined,
+		entities: entities
+	});
+}
+
+export async function resetDb() {
+	const conn = await getConnection();
+	const tables = await conn.query(`SELECT relname AS "table"
+	FROM pg_class C LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
+	WHERE nspname NOT IN ('pg_catalog', 'information_schema')
+		AND C.relkind = 'r'
+		AND nspname !~ '^pg_toast';`);
+	await Promise.all(tables.map(t => t.table).map(x => conn.query(`DELETE FROM "${x}" CASCADE`)));
+}

packages/backend/src/db/redis.ts

@@ -0,0 +1,19 @@
+import * as redis from 'redis';
+import config from '@/config/index';
+
+export function createConnection() {
+	return redis.createClient(
+		config.redis.port,
+		config.redis.host,
+		{
+			password: config.redis.pass,
+			prefix: config.redis.prefix,
+			db: config.redis.db || 0
+		}
+	);
+}
+
+export const subsdcriber = createConnection();
+subsdcriber.subscribe(config.host);
+
+export const redisClient = createConnection();

packages/backend/src/env.ts

@@ -0,0 +1,20 @@
+const envOption = {
+	onlyQueue: false,
+	onlyServer: false,
+	noDaemons: false,
+	disableClustering: false,
+	verbose: false,
+	withLogTime: false,
+	quiet: false,
+	slow: false,
+};
+
+for (const key of Object.keys(envOption) as (keyof typeof envOption)[]) {
+	if (process.env['MK_' + key.replace(/[A-Z]/g, letter => `_${letter}`).toUpperCase()]) envOption[key] = true;
+}
+
+if (process.env.NODE_ENV === 'test') envOption.disableClustering = true;
+if (process.env.NODE_ENV === 'test') envOption.quiet = true;
+if (process.env.NODE_ENV === 'test') envOption.noDaemons = true;
+
+export { envOption };

packages/backend/src/games/reversi/core.ts

@@ -0,0 +1,263 @@
+import { count, concat } from '@/prelude/array';
+
+// MISSKEY REVERSI ENGINE
+
+/**
+ * true ... 黒
+ * false ... 白
+ */
+export type Color = boolean;
+const BLACK = true;
+const WHITE = false;
+
+export type MapPixel = 'null' | 'empty';
+
+export type Options = {
+	isLlotheo: boolean;
+	canPutEverywhere: boolean;
+	loopedBoard: boolean;
+};
+
+export type Undo = {
+	/**
+	 * 色
+	 */
+	color: Color;
+
+	/**
+	 * どこに打ったか
+	 */
+	pos: number;
+
+	/**
+	 * 反転した石の位置の配列
+	 */
+	effects: number[];
+
+	/**
+	 * ターン
+	 */
+	turn: Color | null;
+};
+
+/**
+ * リバーシエンジン
+ */
+export default class Reversi {
+	public map: MapPixel[];
+	public mapWidth: number;
+	public mapHeight: number;
+	public board: (Color | null | undefined)[];
+	public turn: Color | null = BLACK;
+	public opts: Options;
+
+	public prevPos = -1;
+	public prevColor: Color | null = null;
+
+	private logs: Undo[] = [];
+
+	/**
+	 * ゲームを初期化します
+	 */
+	constructor(map: string[], opts: Options) {
+		//#region binds
+		this.put = this.put.bind(this);
+		//#endregion
+
+		//#region Options
+		this.opts = opts;
+		if (this.opts.isLlotheo == null) this.opts.isLlotheo = false;
+		if (this.opts.canPutEverywhere == null) this.opts.canPutEverywhere = false;
+		if (this.opts.loopedBoard == null) this.opts.loopedBoard = false;
+		//#endregion
+
+		//#region Parse map data
+		this.mapWidth = map[0].length;
+		this.mapHeight = map.length;
+		const mapData = map.join('');
+
+		this.board = mapData.split('').map(d => d === '-' ? null : d === 'b' ? BLACK : d === 'w' ? WHITE : undefined);
+
+		this.map = mapData.split('').map(d => d === '-' || d === 'b' || d === 'w' ? 'empty' : 'null');
+		//#endregion
+
+		// ゲームが始まった時点で片方の色の石しかないか、始まった時点で勝敗が決定するようなマップの場合がある
+		if (!this.canPutSomewhere(BLACK))
+			this.turn = this.canPutSomewhere(WHITE) ? WHITE : null;
+	}
+
+	/**
+	 * 黒石の数
+	 */
+	public get blackCount() {
+		return count(BLACK, this.board);
+	}
+
+	/**
+	 * 白石の数
+	 */
+	public get whiteCount() {
+		return count(WHITE, this.board);
+	}
+
+	public transformPosToXy(pos: number): number[] {
+		const x = pos % this.mapWidth;
+		const y = Math.floor(pos / this.mapWidth);
+		return [x, y];
+	}
+
+	public transformXyToPos(x: number, y: number): number {
+		return x + (y * this.mapWidth);
+	}
+
+	/**
+	 * 指定のマスに石を打ちます
+	 * @param color 石の色
+	 * @param pos 位置
+	 */
+	public put(color: Color, pos: number) {
+		this.prevPos = pos;
+		this.prevColor = color;
+
+		this.board[pos] = color;
+
+		// 反転させられる石を取得
+		const effects = this.effects(color, pos);
+
+		// 反転させる
+		for (const pos of effects) {
+			this.board[pos] = color;
+		}
+
+		const turn = this.turn;
+
+		this.logs.push({
+			color,
+			pos,
+			effects,
+			turn
+		});
+
+		this.calcTurn();
+	}
+
+	private calcTurn() {
+		// ターン計算
+		this.turn =
+			this.canPutSomewhere(!this.prevColor) ? !this.prevColor :
+			this.canPutSomewhere(this.prevColor!) ? this.prevColor :
+			null;
+	}
+
+	public undo() {
+		const undo = this.logs.pop()!;
+		this.prevColor = undo.color;
+		this.prevPos = undo.pos;
+		this.board[undo.pos] = null;
+		for (const pos of undo.effects) {
+			const color = this.board[pos];
+			this.board[pos] = !color;
+		}
+		this.turn = undo.turn;
+	}
+
+	/**
+	 * 指定した位置のマップデータのマスを取得します
+	 * @param pos 位置
+	 */
+	public mapDataGet(pos: number): MapPixel {
+		const [x, y] = this.transformPosToXy(pos);
+		return x < 0 || y < 0 || x >= this.mapWidth || y >= this.mapHeight ? 'null' : this.map[pos];
+	}
+
+	/**
+	 * 打つことができる場所を取得します
+	 */
+	public puttablePlaces(color: Color): number[] {
+		return Array.from(this.board.keys()).filter(i => this.canPut(color, i));
+	}
+
+	/**
+	 * 打つことができる場所があるかどうかを取得します
+	 */
+	public canPutSomewhere(color: Color): boolean {
+		return this.puttablePlaces(color).length > 0;
+	}
+
+	/**
+	 * 指定のマスに石を打つことができるかどうかを取得します
+	 * @param color 自分の色
+	 * @param pos 位置
+	 */
+	public canPut(color: Color, pos: number): boolean {
+		return (
+			this.board[pos] !== null ? false : // 既に石が置いてある場所には打てない
+			this.opts.canPutEverywhere ? this.mapDataGet(pos) == 'empty' : // 挟んでなくても置けるモード
+			this.effects(color, pos).length !== 0); // 相手の石を1つでも反転させられるか
+	}
+
+	/**
+	 * 指定のマスに石を置いた時の、反転させられる石を取得します
+	 * @param color 自分の色
+	 * @param initPos 位置
+	 */
+	public effects(color: Color, initPos: number): number[] {
+		const enemyColor = !color;
+
+		const diffVectors: [number, number][] = [
+			[  0,  -1], // 上
+			[ +1,  -1], // 右上
+			[ +1,   0], // 右
+			[ +1,  +1], // 右下
+			[  0,  +1], // 下
+			[ -1,  +1], // 左下
+			[ -1,   0], // 左
+			[ -1,  -1]  // 左上
+		];
+
+		const effectsInLine = ([dx, dy]: [number, number]): number[] => {
+			const nextPos = (x: number, y: number): [number, number] => [x + dx, y + dy];
+
+			const found: number[] = []; // 挟めるかもしれない相手の石を入れておく配列
+			let [x, y] = this.transformPosToXy(initPos);
+			while (true) {
+				[x, y] = nextPos(x, y);
+
+				// 座標が指し示す位置がボード外に出たとき
+				if (this.opts.loopedBoard && this.transformXyToPos(
+					(x = ((x % this.mapWidth) + this.mapWidth) % this.mapWidth),
+					(y = ((y % this.mapHeight) + this.mapHeight) % this.mapHeight)) === initPos)
+						// 盤面の境界でループし、自分が石を置く位置に戻ってきたとき、挟めるようにしている (ref: Test4のマップ)
+					return found;
+				else if (x === -1 || y === -1 || x === this.mapWidth || y === this.mapHeight)
+					return []; // 挟めないことが確定 (盤面外に到達)
+
+				const pos = this.transformXyToPos(x, y);
+				if (this.mapDataGet(pos) === 'null') return []; // 挟めないことが確定 (配置不可能なマスに到達)
+				const stone = this.board[pos];
+				if (stone === null) return []; // 挟めないことが確定 (石が置かれていないマスに到達)
+				if (stone === enemyColor) found.push(pos); // 挟めるかもしれない (相手の石を発見)
+				if (stone === color) return found; // 挟めることが確定 (対となる自分の石を発見)
+			}
+		};
+
+		return concat(diffVectors.map(effectsInLine));
+	}
+
+	/**
+	 * ゲームが終了したか否か
+	 */
+	public get isEnded(): boolean {
+		return this.turn === null;
+	}
+
+	/**
+	 * ゲームの勝者 (null = 引き分け)
+	 */
+	public get winner(): Color | null {
+		return this.isEnded ?
+			this.blackCount == this.whiteCount ? null :
+			this.opts.isLlotheo === this.blackCount > this.whiteCount ? WHITE : BLACK :
+			undefined as never;
+	}
+}

packages/backend/src/games/reversi/maps.ts

@@ -0,0 +1,896 @@
+/**
+ * 組み込みマップ定義
+ *
+ * データ値:
+ * (スペース) ... マス無し
+ * - ... マス
+ * b ... 初期配置される黒石
+ * w ... 初期配置される白石
+ */
+
+export type Map = {
+	name?: string;
+	category?: string;
+	author?: string;
+	data: string[];
+};
+
+export const fourfour: Map = {
+	name: '4x4',
+	category: '4x4',
+	data: [
+		'----',
+		'-wb-',
+		'-bw-',
+		'----'
+	]
+};
+
+export const sixsix: Map = {
+	name: '6x6',
+	category: '6x6',
+	data: [
+		'------',
+		'------',
+		'--wb--',
+		'--bw--',
+		'------',
+		'------'
+	]
+};
+
+export const roundedSixsix: Map = {
+	name: '6x6 rounded',
+	category: '6x6',
+	author: 'syuilo',
+	data: [
+		' ---- ',
+		'------',
+		'--wb--',
+		'--bw--',
+		'------',
+		' ---- '
+	]
+};
+
+export const roundedSixsix2: Map = {
+	name: '6x6 rounded 2',
+	category: '6x6',
+	author: 'syuilo',
+	data: [
+		'  --  ',
+		' ---- ',
+		'--wb--',
+		'--bw--',
+		' ---- ',
+		'  --  '
+	]
+};
+
+export const eighteight: Map = {
+	name: '8x8',
+	category: '8x8',
+	data: [
+		'--------',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		'--------'
+	]
+};
+
+export const eighteightH1: Map = {
+	name: '8x8 handicap 1',
+	category: '8x8',
+	data: [
+		'b-------',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		'--------'
+	]
+};
+
+export const eighteightH2: Map = {
+	name: '8x8 handicap 2',
+	category: '8x8',
+	data: [
+		'b-------',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		'-------b'
+	]
+};
+
+export const eighteightH3: Map = {
+	name: '8x8 handicap 3',
+	category: '8x8',
+	data: [
+		'b------b',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		'-------b'
+	]
+};
+
+export const eighteightH4: Map = {
+	name: '8x8 handicap 4',
+	category: '8x8',
+	data: [
+		'b------b',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		'b------b'
+	]
+};
+
+export const eighteightH28: Map = {
+	name: '8x8 handicap 28',
+	category: '8x8',
+	data: [
+		'bbbbbbbb',
+		'b------b',
+		'b------b',
+		'b--wb--b',
+		'b--bw--b',
+		'b------b',
+		'b------b',
+		'bbbbbbbb'
+	]
+};
+
+export const roundedEighteight: Map = {
+	name: '8x8 rounded',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		' ------ ',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		' ------ '
+	]
+};
+
+export const roundedEighteight2: Map = {
+	name: '8x8 rounded 2',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'  ----  ',
+		' ------ ',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		' ------ ',
+		'  ----  '
+	]
+};
+
+export const roundedEighteight3: Map = {
+	name: '8x8 rounded 3',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'   --   ',
+		'  ----  ',
+		' ------ ',
+		'---wb---',
+		'---bw---',
+		' ------ ',
+		'  ----  ',
+		'   --   '
+	]
+};
+
+export const eighteightWithNotch: Map = {
+	name: '8x8 with notch',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'---  ---',
+		'--------',
+		'--------',
+		' --wb-- ',
+		' --bw-- ',
+		'--------',
+		'--------',
+		'---  ---'
+	]
+};
+
+export const eighteightWithSomeHoles: Map = {
+	name: '8x8 with some holes',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'--- ----',
+		'----- --',
+		'-- -----',
+		'---wb---',
+		'---bw- -',
+		' -------',
+		'--- ----',
+		'--------'
+	]
+};
+
+export const circle: Map = {
+	name: 'Circle',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'   --   ',
+		' ------ ',
+		' ------ ',
+		'---wb---',
+		'---bw---',
+		' ------ ',
+		' ------ ',
+		'   --   '
+	]
+};
+
+export const smile: Map = {
+	name: 'Smile',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		' ------ ',
+		'--------',
+		'-- -- --',
+		'---wb---',
+		'-- bw --',
+		'---  ---',
+		'--------',
+		' ------ '
+	]
+};
+
+export const window: Map = {
+	name: 'Window',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'--------',
+		'-  --  -',
+		'-  --  -',
+		'---wb---',
+		'---bw---',
+		'-  --  -',
+		'-  --  -',
+		'--------'
+	]
+};
+
+export const reserved: Map = {
+	name: 'Reserved',
+	category: '8x8',
+	author: 'Aya',
+	data: [
+		'w------b',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		'b------w'
+	]
+};
+
+export const x: Map = {
+	name: 'X',
+	category: '8x8',
+	author: 'Aya',
+	data: [
+		'w------b',
+		'-w----b-',
+		'--w--b--',
+		'---wb---',
+		'---bw---',
+		'--b--w--',
+		'-b----w-',
+		'b------w'
+	]
+};
+
+export const parallel: Map = {
+	name: 'Parallel',
+	category: '8x8',
+	author: 'Aya',
+	data: [
+		'--------',
+		'--------',
+		'--------',
+		'---bb---',
+		'---ww---',
+		'--------',
+		'--------',
+		'--------'
+	]
+};
+
+export const lackOfBlack: Map = {
+	name: 'Lack of Black',
+	category: '8x8',
+	data: [
+		'--------',
+		'--------',
+		'--------',
+		'---w----',
+		'---bw---',
+		'--------',
+		'--------',
+		'--------'
+	]
+};
+
+export const squareParty: Map = {
+	name: 'Square Party',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'--------',
+		'-wwwbbb-',
+		'-w-wb-b-',
+		'-wwwbbb-',
+		'-bbbwww-',
+		'-b-bw-w-',
+		'-bbbwww-',
+		'--------'
+	]
+};
+
+export const minesweeper: Map = {
+	name: 'Minesweeper',
+	category: '8x8',
+	author: 'syuilo',
+	data: [
+		'b-b--w-w',
+		'-w-wb-b-',
+		'w-b--w-b',
+		'-b-wb-w-',
+		'-w-bw-b-',
+		'b-w--b-w',
+		'-b-bw-w-',
+		'w-w--b-b'
+	]
+};
+
+export const tenthtenth: Map = {
+	name: '10x10',
+	category: '10x10',
+	data: [
+		'----------',
+		'----------',
+		'----------',
+		'----------',
+		'----wb----',
+		'----bw----',
+		'----------',
+		'----------',
+		'----------',
+		'----------'
+	]
+};
+
+export const hole: Map = {
+	name: 'The Hole',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'----------',
+		'----------',
+		'--wb--wb--',
+		'--bw--bw--',
+		'----  ----',
+		'----  ----',
+		'--wb--wb--',
+		'--bw--bw--',
+		'----------',
+		'----------'
+	]
+};
+
+export const grid: Map = {
+	name: 'Grid',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'----------',
+		'- - -- - -',
+		'----------',
+		'- - -- - -',
+		'----wb----',
+		'----bw----',
+		'- - -- - -',
+		'----------',
+		'- - -- - -',
+		'----------'
+	]
+};
+
+export const cross: Map = {
+	name: 'Cross',
+	category: '10x10',
+	author: 'Aya',
+	data: [
+		'   ----   ',
+		'   ----   ',
+		'   ----   ',
+		'----------',
+		'----wb----',
+		'----bw----',
+		'----------',
+		'   ----   ',
+		'   ----   ',
+		'   ----   '
+	]
+};
+
+export const charX: Map = {
+	name: 'Char X',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'---    ---',
+		'----  ----',
+		'----------',
+		' -------- ',
+		'  --wb--  ',
+		'  --bw--  ',
+		' -------- ',
+		'----------',
+		'----  ----',
+		'---    ---'
+	]
+};
+
+export const charY: Map = {
+	name: 'Char Y',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'---    ---',
+		'----  ----',
+		'----------',
+		' -------- ',
+		'  --wb--  ',
+		'  --bw--  ',
+		'  ------  ',
+		'  ------  ',
+		'  ------  ',
+		'  ------  '
+	]
+};
+
+export const walls: Map = {
+	name: 'Walls',
+	category: '10x10',
+	author: 'Aya',
+	data: [
+		' bbbbbbbb ',
+		'w--------w',
+		'w--------w',
+		'w--------w',
+		'w---wb---w',
+		'w---bw---w',
+		'w--------w',
+		'w--------w',
+		'w--------w',
+		' bbbbbbbb '
+	]
+};
+
+export const cpu: Map = {
+	name: 'CPU',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		' b b  b b ',
+		'w--------w',
+		' -------- ',
+		'w--------w',
+		' ---wb--- ',
+		' ---bw--- ',
+		'w--------w',
+		' -------- ',
+		'w--------w',
+		' b b  b b '
+	]
+};
+
+export const checker: Map = {
+	name: 'Checker',
+	category: '10x10',
+	author: 'Aya',
+	data: [
+		'----------',
+		'----------',
+		'----------',
+		'---wbwb---',
+		'---bwbw---',
+		'---wbwb---',
+		'---bwbw---',
+		'----------',
+		'----------',
+		'----------'
+	]
+};
+
+export const japaneseCurry: Map = {
+	name: 'Japanese curry',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'w-b-b-b-b-',
+		'-w-b-b-b-b',
+		'w-w-b-b-b-',
+		'-w-w-b-b-b',
+		'w-w-wwb-b-',
+		'-w-wbb-b-b',
+		'w-w-w-b-b-',
+		'-w-w-w-b-b',
+		'w-w-w-w-b-',
+		'-w-w-w-w-b'
+	]
+};
+
+export const mosaic: Map = {
+	name: 'Mosaic',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'- - - - - ',
+		' - - - - -',
+		'- - - - - ',
+		' - w w - -',
+		'- - b b - ',
+		' - w w - -',
+		'- - b b - ',
+		' - - - - -',
+		'- - - - - ',
+		' - - - - -',
+	]
+};
+
+export const arena: Map = {
+	name: 'Arena',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'- - -- - -',
+		' - -  - - ',
+		'- ------ -',
+		' -------- ',
+		'- --wb-- -',
+		'- --bw-- -',
+		' -------- ',
+		'- ------ -',
+		' - -  - - ',
+		'- - -- - -'
+	]
+};
+
+export const reactor: Map = {
+	name: 'Reactor',
+	category: '10x10',
+	author: 'syuilo',
+	data: [
+		'-w------b-',
+		'b- -  - -w',
+		'- --wb-- -',
+		'---b  w---',
+		'- b wb w -',
+		'- w bw b -',
+		'---w  b---',
+		'- --bw-- -',
+		'w- -  - -b',
+		'-b------w-'
+	]
+};
+
+export const sixeight: Map = {
+	name: '6x8',
+	category: 'Special',
+	data: [
+		'------',
+		'------',
+		'------',
+		'--wb--',
+		'--bw--',
+		'------',
+		'------',
+		'------'
+	]
+};
+
+export const spark: Map = {
+	name: 'Spark',
+	category: 'Special',
+	author: 'syuilo',
+	data: [
+		' -      - ',
+		'----------',
+		' -------- ',
+		' -------- ',
+		' ---wb--- ',
+		' ---bw--- ',
+		' -------- ',
+		' -------- ',
+		'----------',
+		' -      - '
+	]
+};
+
+export const islands: Map = {
+	name: 'Islands',
+	category: 'Special',
+	author: 'syuilo',
+	data: [
+		'--------  ',
+		'---wb---  ',
+		'---bw---  ',
+		'--------  ',
+		'  -    -  ',
+		'  -    -  ',
+		'  --------',
+		'  --------',
+		'  --------',
+		'  --------'
+	]
+};
+
+export const galaxy: Map = {
+	name: 'Galaxy',
+	category: 'Special',
+	author: 'syuilo',
+	data: [
+		'   ------   ',
+		'  --www---  ',
+		' ------w--- ',
+		'---bbb--w---',
+		'--b---b-w-b-',
+		'-b--wwb-w-b-',
+		'-b-w-bww--b-',
+		'-b-w-b---b--',
+		'---w--bbb---',
+		' ---w------ ',
+		'  ---www--  ',
+		'   ------   '
+	]
+};
+
+export const triangle: Map = {
+	name: 'Triangle',
+	category: 'Special',
+	author: 'syuilo',
+	data: [
+		'    --    ',
+		'    --    ',
+		'   ----   ',
+		'   ----   ',
+		'  --wb--  ',
+		'  --bw--  ',
+		' -------- ',
+		' -------- ',
+		'----------',
+		'----------'
+	]
+};
+
+export const iphonex: Map = {
+	name: 'iPhone X',
+	category: 'Special',
+	author: 'syuilo',
+	data: [
+		' --  -- ',
+		'--------',
+		'--------',
+		'--------',
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------',
+		'--------',
+		'--------',
+		'--------',
+		' ------ '
+	]
+};
+
+export const dealWithIt: Map = {
+	name: 'Deal with it!',
+	category: 'Special',
+	author: 'syuilo',
+	data: [
+		'------------',
+		'--w-b-------',
+		' --b-w------',
+		'  --w-b---- ',
+		'   -------  '
+	]
+};
+
+export const experiment: Map = {
+	name: 'Let\'s experiment',
+	category: 'Special',
+	author: 'syuilo',
+	data: [
+		' ------------ ',
+		'------wb------',
+		'------bw------',
+		'--------------',
+		'    -    -    ',
+		'------  ------',
+		'bbbbbb  wwwwww',
+		'bbbbbb  wwwwww',
+		'bbbbbb  wwwwww',
+		'bbbbbb  wwwwww',
+		'wwwwww  bbbbbb'
+	]
+};
+
+export const bigBoard: Map = {
+	name: 'Big board',
+	category: 'Special',
+	data: [
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'-------wb-------',
+		'-------bw-------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------',
+		'----------------'
+	]
+};
+
+export const twoBoard: Map = {
+	name: 'Two board',
+	category: 'Special',
+	author: 'Aya',
+	data: [
+		'-------- --------',
+		'-------- --------',
+		'-------- --------',
+		'---wb--- ---wb---',
+		'---bw--- ---bw---',
+		'-------- --------',
+		'-------- --------',
+		'-------- --------'
+	]
+};
+
+export const test1: Map = {
+	name: 'Test1',
+	category: 'Test',
+	data: [
+		'--------',
+		'---wb---',
+		'---bw---',
+		'--------'
+	]
+};
+
+export const test2: Map = {
+	name: 'Test2',
+	category: 'Test',
+	data: [
+		'------',
+		'------',
+		'-b--w-',
+		'-w--b-',
+		'-w--b-'
+	]
+};
+
+export const test3: Map = {
+	name: 'Test3',
+	category: 'Test',
+	data: [
+		'-w-',
+		'--w',
+		'w--',
+		'-w-',
+		'--w',
+		'w--',
+		'-w-',
+		'--w',
+		'w--',
+		'-w-',
+		'---',
+		'b--',
+	]
+};
+
+export const test4: Map = {
+	name: 'Test4',
+	category: 'Test',
+	data: [
+		'-w--b-',
+		'-w--b-',
+		'------',
+		'-w--b-',
+		'-w--b-'
+	]
+};
+
+// 検証用: この盤面で藍(lv3)が黒で始めると何故か(?)A1に打ってしまう
+export const test6: Map = {
+	name: 'Test6',
+	category: 'Test',
+	data: [
+		'--wwwww-',
+		'wwwwwwww',
+		'wbbbwbwb',
+		'wbbbbwbb',
+		'wbwbbwbb',
+		'wwbwbbbb',
+		'--wbbbbb',
+		'-wwwww--',
+	]
+};
+
+// 検証用: この盤面で藍(lv3)が黒で始めると何故か(?)G7に打ってしまう
+export const test7: Map = {
+	name: 'Test7',
+	category: 'Test',
+	data: [
+		'b--w----',
+		'b-wwww--',
+		'bwbwwwbb',
+		'wbwwwwb-',
+		'wwwwwww-',
+		'-wwbbwwb',
+		'--wwww--',
+		'--wwww--',
+	]
+};
+
+// 検証用: この盤面で藍(lv5)が黒で始めると何故か(?)A1に打ってしまう
+export const test8: Map = {
+	name: 'Test8',
+	category: 'Test',
+	data: [
+		'--------',
+		'-----w--',
+		'w--www--',
+		'wwwwww--',
+		'bbbbwww-',
+		'wwwwww--',
+		'--www---',
+		'--ww----',
+	]
+};

packages/backend/src/games/reversi/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "misskey-reversi",
+  "version": "0.0.5",
+  "description": "Misskey reversi engine",
+  "keywords": [
+    "misskey"
+  ],
+  "author": "syuilo <i@syuilo.com>",
+  "license": "MIT",
+  "repository": "https://github.com/misskey-dev/misskey.git",
+  "bugs": "https://github.com/misskey-dev/misskey/issues",
+  "main": "./built/core.js",
+  "types": "./built/core.d.ts",
+  "scripts": {
+    "build": "tsc"
+  },
+  "dependencies": {}
+}

packages/backend/src/games/reversi/tsconfig.json

@@ -0,0 +1,21 @@
+{
+	"compilerOptions": {
+		"noEmitOnError": false,
+		"noImplicitAny": false,
+		"noImplicitReturns": true,
+		"noFallthroughCasesInSwitch": true,
+		"experimentalDecorators": true,
+		"declaration": true,
+		"sourceMap": false,
+		"target": "es2017",
+		"module": "commonjs",
+		"removeComments": false,
+		"noLib": false,
+		"outDir": "./built",
+		"rootDir": "./"
+	},
+	"compileOnSave": false,
+	"include": [
+		"./core.ts"
+	]
+}

packages/backend/src/global.d.ts

@@ -0,0 +1 @@
+type FIXME = any;

packages/backend/src/index.ts

@@ -0,0 +1,11 @@
+/**
+ * Misskey Entry Point!
+ */
+
+Error.stackTraceLimit = Infinity;
+
+require('events').EventEmitter.defaultMaxListeners = 128;
+
+import boot from './boot/index';
+
+boot();

packages/backend/src/mfm/from-html.ts

@@ -0,0 +1,209 @@
+import * as parse5 from 'parse5';
+import treeAdapter = require('parse5/lib/tree-adapters/default');
+import { URL } from 'url';
+
+const urlRegex     = /^https?:\/\/[\w\/:%#@$&?!()\[\]~.,=+\-]+/;
+const urlRegexFull = /^https?:\/\/[\w\/:%#@$&?!()\[\]~.,=+\-]+$/;
+
+export function fromHtml(html: string, hashtagNames?: string[]): string | null {
+	if (html == null) return null;
+
+	const dom = parse5.parseFragment(html);
+
+	let text = '';
+
+	for (const n of dom.childNodes) {
+		analyze(n);
+	}
+
+	return text.trim();
+
+	function getText(node: parse5.Node): string {
+		if (treeAdapter.isTextNode(node)) return node.value;
+		if (!treeAdapter.isElementNode(node)) return '';
+		if (node.nodeName === 'br') return '\n';
+
+		if (node.childNodes) {
+			return node.childNodes.map(n => getText(n)).join('');
+		}
+
+		return '';
+	}
+
+	function appendChildren(childNodes: parse5.ChildNode[]): void {
+		if (childNodes) {
+			for (const n of childNodes) {
+				analyze(n);
+			}
+		}
+	}
+
+	function analyze(node: parse5.Node) {
+		if (treeAdapter.isTextNode(node)) {
+			text += node.value;
+			return;
+		}
+
+		// Skip comment or document type node
+		if (!treeAdapter.isElementNode(node)) return;
+
+		switch (node.nodeName) {
+			case 'br':
+				text += '\n';
+				break;
+
+			case 'a':
+			{
+				const txt = getText(node);
+				const rel = node.attrs.find(x => x.name === 'rel');
+				const href = node.attrs.find(x => x.name === 'href');
+
+				// ハッシュタグ
+				if (hashtagNames && href && hashtagNames.map(x => x.toLowerCase()).includes(txt.toLowerCase())) {
+					text += txt;
+				// メンション
+				} else if (txt.startsWith('@') && !(rel && rel.value.match(/^me /))) {
+					const part = txt.split('@');
+
+					if (part.length === 2 && href) {
+						//#region ホスト名部分が省略されているので復元する
+						const acct = `${txt}@${(new URL(href.value)).hostname}`;
+						text += acct;
+						//#endregion
+					} else if (part.length === 3) {
+						text += txt;
+					}
+				// その他
+				} else {
+					const generateLink = () => {
+						if (!href && !txt) {
+							return '';
+						}
+						if (!href) {
+							return txt;
+						}
+						if (!txt || txt === href.value) {	// #6383: Missing text node
+							if (href.value.match(urlRegexFull)) {
+								return href.value;
+							} else {
+								return `<${href.value}>`;
+							}
+						}
+						if (href.value.match(urlRegex) && !href.value.match(urlRegexFull)) {
+							return `[${txt}](<${href.value}>)`;	// #6846
+						} else {
+							return `[${txt}](${href.value})`;
+						}
+					};
+
+					text += generateLink();
+				}
+				break;
+			}
+
+			case 'h1':
+			{
+				text += '【';
+				appendChildren(node.childNodes);
+				text += '】\n';
+				break;
+			}
+
+			case 'b':
+			case 'strong':
+			{
+				text += '**';
+				appendChildren(node.childNodes);
+				text += '**';
+				break;
+			}
+
+			case 'small':
+			{
+				text += '<small>';
+				appendChildren(node.childNodes);
+				text += '</small>';
+				break;
+			}
+
+			case 's':
+			case 'del':
+			{
+				text += '~~';
+				appendChildren(node.childNodes);
+				text += '~~';
+				break;
+			}
+
+			case 'i':
+			case 'em':
+			{
+				text += '<i>';
+				appendChildren(node.childNodes);
+				text += '</i>';
+				break;
+			}
+
+			// block code (<pre><code>)
+			case 'pre': {
+				if (node.childNodes.length === 1 && node.childNodes[0].nodeName === 'code') {
+					text += '\n```\n';
+					text += getText(node.childNodes[0]);
+					text += '\n```\n';
+				} else {
+					appendChildren(node.childNodes);
+				}
+				break;
+			}
+
+			// inline code (<code>)
+			case 'code': {
+				text += '`';
+				appendChildren(node.childNodes);
+				text += '`';
+				break;
+			}
+
+			case 'blockquote': {
+				const t = getText(node);
+				if (t) {
+					text += '> ';
+					text += t.split('\n').join(`\n> `);
+				}
+				break;
+			}
+
+			case 'p':
+			case 'h2':
+			case 'h3':
+			case 'h4':
+			case 'h5':
+			case 'h6':
+			{
+				text += '\n\n';
+				appendChildren(node.childNodes);
+				break;
+			}
+
+			// other block elements
+			case 'div':
+			case 'header':
+			case 'footer':
+			case 'article':
+			case 'li':
+			case 'dt':
+			case 'dd':
+			{
+				text += '\n';
+				appendChildren(node.childNodes);
+				break;
+			}
+
+			default:	// includes inline elements
+			{
+				appendChildren(node.childNodes);
+				break;
+			}
+		}
+	}
+}

packages/backend/src/mfm/to-html.ts

@@ -0,0 +1,153 @@
+import { JSDOM } from 'jsdom';
+import * as mfm from 'mfm-js';
+import config from '@/config/index';
+import { intersperse } from '@/prelude/array';
+import { IMentionedRemoteUsers } from '@/models/entities/note';
+
+export function toHtml(nodes: mfm.MfmNode[] | null, mentionedRemoteUsers: IMentionedRemoteUsers = []) {
+	if (nodes == null) {
+		return null;
+	}
+
+	const { window } = new JSDOM('');
+
+	const doc = window.document;
+
+	function appendChildren(children: mfm.MfmNode[], targetElement: any): void {
+		if (children) {
+			for (const child of children.map(x => (handlers as any)[x.type](x))) targetElement.appendChild(child);
+		}
+	}
+
+	const handlers: { [K in mfm.MfmNode['type']]: (node: mfm.NodeType<K>) => any } = {
+		bold(node) {
+			const el = doc.createElement('b');
+			appendChildren(node.children, el);
+			return el;
+		},
+
+		small(node) {
+			const el = doc.createElement('small');
+			appendChildren(node.children, el);
+			return el;
+		},
+
+		strike(node) {
+			const el = doc.createElement('del');
+			appendChildren(node.children, el);
+			return el;
+		},
+
+		italic(node) {
+			const el = doc.createElement('i');
+			appendChildren(node.children, el);
+			return el;
+		},
+
+		fn(node) {
+			const el = doc.createElement('i');
+			appendChildren(node.children, el);
+			return el;
+		},
+
+		blockCode(node) {
+			const pre = doc.createElement('pre');
+			const inner = doc.createElement('code');
+			inner.textContent = node.props.code;
+			pre.appendChild(inner);
+			return pre;
+		},
+
+		center(node) {
+			const el = doc.createElement('div');
+			appendChildren(node.children, el);
+			return el;
+		},
+
+		emojiCode(node) {
+			return doc.createTextNode(`\u200B:${node.props.name}:\u200B`);
+		},
+
+		unicodeEmoji(node) {
+			return doc.createTextNode(node.props.emoji);
+		},
+
+		hashtag(node) {
+			const a = doc.createElement('a');
+			a.href = `${config.url}/tags/${node.props.hashtag}`;
+			a.textContent = `#${node.props.hashtag}`;
+			a.setAttribute('rel', 'tag');
+			return a;
+		},
+
+		inlineCode(node) {
+			const el = doc.createElement('code');
+			el.textContent = node.props.code;
+			return el;
+		},
+
+		mathInline(node) {
+			const el = doc.createElement('code');
+			el.textContent = node.props.formula;
+			return el;
+		},
+
+		mathBlock(node) {
+			const el = doc.createElement('code');
+			el.textContent = node.props.formula;
+			return el;
+		},
+
+		link(node) {
+			const a = doc.createElement('a');
+			a.href = node.props.url;
+			appendChildren(node.children, a);
+			return a;
+		},
+
+		mention(node) {
+			const a = doc.createElement('a');
+			const { username, host, acct } = node.props;
+			const remoteUserInfo = mentionedRemoteUsers.find(remoteUser => remoteUser.username === username && remoteUser.host === host);
+			a.href = remoteUserInfo ? (remoteUserInfo.url ? remoteUserInfo.url : remoteUserInfo.uri) : `${config.url}/${acct}`;
+			a.className = 'u-url mention';
+			a.textContent = acct;
+			return a;
+		},
+
+		quote(node) {
+			const el = doc.createElement('blockquote');
+			appendChildren(node.children, el);
+			return el;
+		},
+
+		text(node) {
+			const el = doc.createElement('span');
+			const nodes = node.props.text.split(/\r\n|\r|\n/).map(x => doc.createTextNode(x));
+
+			for (const x of intersperse<FIXME | 'br'>('br', nodes)) {
+				el.appendChild(x === 'br' ? doc.createElement('br') : x);
+			}
+
+			return el;
+		},
+
+		url(node) {
+			const a = doc.createElement('a');
+			a.href = node.props.url;
+			a.textContent = node.props.url;
+			return a;
+		},
+
+		search(node) {
+			const a = doc.createElement('a');
+			a.href = `https://www.google.com/search?q=${node.props.query}`;
+			a.textContent = node.props.content;
+			return a;
+		}
+	};
+
+	appendChildren(nodes, doc.body);
+
+	return `<p>${doc.body.innerHTML}</p>`;
+}

packages/backend/src/misc/antenna-cache.ts

@@ -0,0 +1,36 @@
+import { Antennas } from '@/models/index';
+import { Antenna } from '@/models/entities/antenna';
+import { subsdcriber } from '../db/redis';
+
+let antennasFetched = false;
+let antennas: Antenna[] = [];
+
+export async function getAntennas() {
+	if (!antennasFetched) {
+		antennas = await Antennas.find();
+		antennasFetched = true;
+	}
+
+	return antennas;
+}
+
+subsdcriber.on('message', async (_, data) => {
+	const obj = JSON.parse(data);
+
+	if (obj.channel === 'internal') {
+		const { type, body } = obj.message;
+		switch (type) {
+			case 'antennaCreated':
+				antennas.push(body);
+				break;
+			case 'antennaUpdated':
+				antennas[antennas.findIndex(a => a.id === body.id)] = body;
+				break;
+			case 'antennaDeleted':
+				antennas = antennas.filter(a => a.id !== body.id);
+				break;
+			default:
+				break;
+		}
+	}
+});

packages/backend/src/misc/api-permissions.ts

@@ -0,0 +1,35 @@
+export const kinds = [
+	'read:account',
+	'write:account',
+	'read:blocks',
+	'write:blocks',
+	'read:drive',
+	'write:drive',
+	'read:favorites',
+	'write:favorites',
+	'read:following',
+	'write:following',
+	'read:messaging',
+	'write:messaging',
+	'read:mutes',
+	'write:mutes',
+	'write:notes',
+	'read:notifications',
+	'write:notifications',
+	'read:reactions',
+	'write:reactions',
+	'write:votes',
+	'read:pages',
+	'write:pages',
+	'write:page-likes',
+	'read:page-likes',
+	'read:user-groups',
+	'write:user-groups',
+	'read:channels',
+	'write:channels',
+	'read:gallery',
+	'write:gallery',
+	'read:gallery-likes',
+	'write:gallery-likes',
+];
+// IF YOU ADD KINDS(PERMISSIONS), YOU MUST ADD TRANSLATIONS (under _permissions).

packages/backend/src/misc/app-lock.ts

@@ -0,0 +1,31 @@
+import { redisClient } from '../db/redis';
+import { promisify } from 'util';
+import * as redisLock from 'redis-lock';
+
+/**
+ * Retry delay (ms) for lock acquisition
+ */
+const retryDelay = 100;
+
+const lock: (key: string, timeout?: number) => Promise<() => void>
+	= redisClient
+	? promisify(redisLock(redisClient, retryDelay))
+	: async () => () => { };
+
+/**
+ * Get AP Object lock
+ * @param uri AP object ID
+ * @param timeout Lock timeout (ms), The timeout releases previous lock.
+ * @returns Unlock function
+ */
+export function getApLock(uri: string, timeout = 30 * 1000) {
+	return lock(`ap-object:${uri}`, timeout);
+}
+
+export function getFetchInstanceMetadataLock(host: string, timeout = 30 * 1000) {
+	return lock(`instance:${host}`, timeout);
+}
+
+export function getChartInsertLock(lockKey: string, timeout = 30 * 1000) {
+	return lock(`chart-insert:${lockKey}`, timeout);
+}

packages/backend/src/misc/before-shutdown.ts

@@ -0,0 +1,92 @@
+// https://gist.github.com/nfantone/1eaa803772025df69d07f4dbf5df7e58
+
+'use strict';
+
+/**
+ * @callback BeforeShutdownListener
+ * @param {string} [signalOrEvent] The exit signal or event name received on the process.
+ */
+
+/**
+ * System signals the app will listen to initiate shutdown.
+ * @const {string[]}
+ */
+const SHUTDOWN_SIGNALS = ['SIGINT', 'SIGTERM'];
+
+/**
+ * Time in milliseconds to wait before forcing shutdown.
+ * @const {number}
+ */
+const SHUTDOWN_TIMEOUT = 15000;
+
+/**
+ * A queue of listener callbacks to execute before shutting
+ * down the process.
+ * @type {BeforeShutdownListener[]}
+ */
+const shutdownListeners = [];
+
+/**
+ * Listen for signals and execute given `fn` function once.
+ * @param  {string[]} signals System signals to listen to.
+ * @param  {function(string)} fn Function to execute on shutdown.
+ */
+const processOnce = (signals, fn) => {
+	for (const sig of signals) {
+		process.once(sig, fn);
+	}
+};
+
+/**
+ * Sets a forced shutdown mechanism that will exit the process after `timeout` milliseconds.
+ * @param {number} timeout Time to wait before forcing shutdown (milliseconds)
+ */
+const forceExitAfter = timeout => () => {
+	setTimeout(() => {
+		// Force shutdown after timeout
+		console.warn(`Could not close resources gracefully after ${timeout}ms: forcing shutdown`);
+		return process.exit(1);
+	}, timeout).unref();
+};
+
+/**
+ * Main process shutdown handler. Will invoke every previously registered async shutdown listener
+ * in the queue and exit with a code of `0`. Any `Promise` rejections from any listener will
+ * be logged out as a warning, but won't prevent other callbacks from executing.
+ * @param {string} signalOrEvent The exit signal or event name received on the process.
+ */
+async function shutdownHandler(signalOrEvent) {
+	if (process.env.NODE_ENV === 'test') return process.exit(0);
+
+	console.warn(`Shutting down: received [${signalOrEvent}] signal`);
+
+	for (const listener of shutdownListeners) {
+		try {
+			await listener(signalOrEvent);
+		} catch (err) {
+			console.warn(`A shutdown handler failed before completing with: ${err.message || err}`);
+		}
+	}
+
+	return process.exit(0);
+}
+
+/**
+ * Registers a new shutdown listener to be invoked before exiting
+ * the main process. Listener handlers are guaranteed to be called in the order
+ * they were registered.
+ * @param {BeforeShutdownListener} listener The shutdown listener to register.
+ * @returns {BeforeShutdownListener} Echoes back the supplied `listener`.
+ */
+export function beforeShutdown(listener) {
+	shutdownListeners.push(listener);
+	return listener;
+}
+
+// Register shutdown callback that kills the process after `SHUTDOWN_TIMEOUT` milliseconds
+// This prevents custom shutdown handlers from hanging the process indefinitely
+processOnce(SHUTDOWN_SIGNALS, forceExitAfter(SHUTDOWN_TIMEOUT));
+
+// Register process shutdown callback
+// Will listen to incoming signal events and execute all registered handlers in the stack
+processOnce(SHUTDOWN_SIGNALS, shutdownHandler);

packages/backend/src/misc/cache.ts

@@ -0,0 +1,43 @@
+export class Cache<T> {
+	private cache: Map<string | null, { date: number; value: T; }>;
+	private lifetime: number;
+
+	constructor(lifetime: Cache<never>['lifetime']) {
+		this.cache = new Map();
+		this.lifetime = lifetime;
+	}
+
+	public set(key: string | null, value: T): void {
+		this.cache.set(key, {
+			date: Date.now(),
+			value
+		});
+	}
+
+	public get(key: string | null): T | undefined {
+		const cached = this.cache.get(key);
+		if (cached == null) return undefined;
+		if ((Date.now() - cached.date) > this.lifetime) {
+			this.cache.delete(key);
+			return undefined;
+		}
+		return cached.value;
+	}
+
+	public delete(key: string | null) {
+		this.cache.delete(key);
+	}
+
+	public async fetch(key: string | null, fetcher: () => Promise<T>): Promise<T> {
+		const cachedValue = this.get(key);
+		if (cachedValue !== undefined) {
+			// Cache HIT
+			return cachedValue;
+		}
+
+		// Cache MISS
+		const value = await fetcher();
+		this.set(key, value);
+		return value;
+	}
+}

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

@@ -0,0 +1,32 @@
+import { Context } from 'cafy';
+
+export class ID<Maybe = string> extends Context<string | (Maybe extends {} ? string : Maybe)> {
+	public readonly name = 'ID';
+
+	constructor(optional = false, nullable = false) {
+		super(optional, nullable);
+
+		this.push((v: any) => {
+			if (typeof v !== 'string') {
+				return new Error('must-be-an-id');
+			}
+			return true;
+		});
+	}
+
+	public getType() {
+		return super.getType('String');
+	}
+
+	public makeOptional(): ID<undefined> {
+		return new ID(true, false);
+	}
+
+	public makeNullable(): ID<null> {
+		return new ID(false, true);
+	}
+
+	public makeOptionalNullable(): ID<undefined | null> {
+		return new ID(true, true);
+	}
+}

packages/backend/src/misc/captcha.ts

@@ -0,0 +1,56 @@
+import fetch from 'node-fetch';
+import { URLSearchParams } from 'url';
+import { getAgentByUrl } from './fetch';
+import config from '@/config/index';
+
+export async function verifyRecaptcha(secret: string, response: string) {
+	const result = await getCaptchaResponse('https://www.recaptcha.net/recaptcha/api/siteverify', secret, response).catch(e => {
+		throw `recaptcha-request-failed: ${e}`;
+	});
+
+	if (result.success !== true) {
+		const errorCodes = result['error-codes'] ? result['error-codes']?.join(', ') : '';
+		throw `recaptcha-failed: ${errorCodes}`;
+	}
+}
+
+export async function verifyHcaptcha(secret: string, response: string) {
+	const result = await getCaptchaResponse('https://hcaptcha.com/siteverify', secret, response).catch(e => {
+		throw `hcaptcha-request-failed: ${e}`;
+	});
+
+	if (result.success !== true) {
+		const errorCodes = result['error-codes'] ? result['error-codes']?.join(', ') : '';
+		throw `hcaptcha-failed: ${errorCodes}`;
+	}
+}
+
+type CaptchaResponse = {
+	success: boolean;
+	'error-codes'?: string[];
+};
+
+async function getCaptchaResponse(url: string, secret: string, response: string): Promise<CaptchaResponse> {
+	const params = new URLSearchParams({
+		secret,
+		response
+	});
+
+	const res = await fetch(url, {
+		method: 'POST',
+		body: params,
+		headers: {
+			'User-Agent': config.userAgent
+		},
+		timeout: 10 * 1000,
+		agent: getAgentByUrl
+	}).catch(e => {
+		throw `${e.message || e}`;
+	});
+
+	if (!res.ok) {
+		throw `${res.status}`;
+	}
+
+	return await res.json() as CaptchaResponse;
+}

packages/backend/src/misc/check-hit-antenna.ts

@@ -0,0 +1,90 @@
+import { Antenna } from '@/models/entities/antenna';
+import { Note } from '@/models/entities/note';
+import { User } from '@/models/entities/user';
+import { UserListJoinings, UserGroupJoinings } from '@/models/index';
+import { getFullApAccount } from './convert-host';
+import * as Acct from 'misskey-js/built/acct';
+import { Packed } from './schema';
+
+/**
+ * noteUserFollowers / antennaUserFollowing はどちらか一方が指定されていればよい
+ */
+export async function checkHitAntenna(antenna: Antenna, note: (Note | Packed<'Note'>), noteUser: { username: string; host: string | null; }, noteUserFollowers?: User['id'][], antennaUserFollowing?: User['id'][]): Promise<boolean> {
+	if (note.visibility === 'specified') return false;
+
+	if (note.visibility === 'followers') {
+		if (noteUserFollowers && !noteUserFollowers.includes(antenna.userId)) return false;
+		if (antennaUserFollowing && !antennaUserFollowing.includes(note.userId)) return false;
+	}
+
+	if (!antenna.withReplies && note.replyId != null) return false;
+
+	if (antenna.src === 'home') {
+		if (noteUserFollowers && !noteUserFollowers.includes(antenna.userId)) return false;
+		if (antennaUserFollowing && !antennaUserFollowing.includes(note.userId)) return false;
+	} else if (antenna.src === 'list') {
+		const listUsers = (await UserListJoinings.find({
+			userListId: antenna.userListId!
+		})).map(x => x.userId);
+
+		if (!listUsers.includes(note.userId)) return false;
+	} else if (antenna.src === 'group') {
+		const joining = await UserGroupJoinings.findOneOrFail(antenna.userGroupJoiningId!);
+
+		const groupUsers = (await UserGroupJoinings.find({
+			userGroupId: joining.userGroupId
+		})).map(x => x.userId);
+
+		if (!groupUsers.includes(note.userId)) return false;
+	} else if (antenna.src === 'users') {
+		const accts = antenna.users.map(x => {
+			const { username, host } = Acct.parse(x);
+			return getFullApAccount(username, host).toLowerCase();
+		});
+		if (!accts.includes(getFullApAccount(noteUser.username, noteUser.host).toLowerCase())) return false;
+	}
+
+	const keywords = antenna.keywords
+		// Clean up
+		.map(xs => xs.filter(x => x !== ''))
+		.filter(xs => xs.length > 0);
+
+	if (keywords.length > 0) {
+		if (note.text == null) return false;
+
+		const matched = keywords.some(and =>
+			and.every(keyword =>
+				antenna.caseSensitive
+					? note.text!.includes(keyword)
+					: note.text!.toLowerCase().includes(keyword.toLowerCase())
+			));
+
+		if (!matched) return false;
+	}
+
+	const excludeKeywords = antenna.excludeKeywords
+		// Clean up
+		.map(xs => xs.filter(x => x !== ''))
+		.filter(xs => xs.length > 0);
+
+	if (excludeKeywords.length > 0) {
+		if (note.text == null) return false;
+
+		const matched = excludeKeywords.some(and =>
+			and.every(keyword =>
+				antenna.caseSensitive
+					? note.text!.includes(keyword)
+					: note.text!.toLowerCase().includes(keyword.toLowerCase())
+			));
+
+		if (matched) return false;
+	}
+
+	if (antenna.withFile) {
+		if (note.fileIds && note.fileIds.length === 0) return false;
+	}
+
+	// TODO: eval expression
+
+	return true;
+}

packages/backend/src/misc/check-word-mute.ts

@@ -0,0 +1,39 @@
+const RE2 = require('re2');
+import { Note } from '@/models/entities/note';
+import { User } from '@/models/entities/user';
+
+type NoteLike = {
+	userId: Note['userId'];
+	text: Note['text'];
+};
+
+type UserLike = {
+	id: User['id'];
+};
+
+export async function checkWordMute(note: NoteLike, me: UserLike | null | undefined, mutedWords: string[][]): Promise<boolean> {
+	// 自分自身
+	if (me && (note.userId === me.id)) return false;
+
+	const words = mutedWords
+		// Clean up
+		.map(xs => xs.filter(x => x !== ''))
+		.filter(xs => xs.length > 0);
+
+	if (words.length > 0) {
+		if (note.text == null) return false;
+
+		const matched = words.some(and =>
+			and.every(keyword => {
+				const regexp = keyword.match(/^\/(.+)\/(.*)$/);
+				if (regexp) {
+					return new RE2(regexp[1], regexp[2]).test(note.text!);
+				}
+				return note.text!.includes(keyword);
+			}));
+
+		if (matched) return true;
+	}
+
+	return false;
+}

packages/backend/src/misc/content-disposition.ts

@@ -0,0 +1,6 @@
+const cd = require('content-disposition');
+
+export function contentDisposition(type: 'inline' | 'attachment', filename: string): string {
+	const fallback = filename.replace(/[^\w.-]/g, '_');
+	return cd(filename, { type, fallback });
+}

packages/backend/src/misc/convert-host.ts

@@ -0,0 +1,26 @@
+import { URL } from 'url';
+import config from '@/config/index';
+import { toASCII } from 'punycode/';
+
+export function getFullApAccount(username: string, host: string | null) {
+	return host ? `${username}@${toPuny(host)}` : `${username}@${toPuny(config.host)}`;
+}
+
+export function isSelfHost(host: string) {
+	if (host == null) return true;
+	return toPuny(config.host) === toPuny(host);
+}
+
+export function extractDbHost(uri: string) {
+	const url = new URL(uri);
+	return toPuny(url.hostname);
+}
+
+export function toPuny(host: string) {
+	return toASCII(host.toLowerCase());
+}
+
+export function toPunyNullable(host: string | null | undefined): string | null {
+	if (host == null) return null;
+	return toASCII(host.toLowerCase());
+}

packages/backend/src/misc/count-same-renotes.ts

@@ -0,0 +1,15 @@
+import { Notes } from '@/models/index';
+
+export async function countSameRenotes(userId: string, renoteId: string, excludeNoteId: string | undefined): Promise<number> {
+	// 指定したユーザーの指定したノートのリノートがいくつあるか数える
+	const query = Notes.createQueryBuilder('note')
+		.where('note.userId = :userId', { userId })
+		.andWhere('note.renoteId = :renoteId', { renoteId });
+
+	// 指定した投稿を除く
+	if (excludeNoteId) {
+		query.andWhere('note.id != :excludeNoteId', { excludeNoteId });
+	}
+
+	return await query.getCount();
+}

packages/backend/src/misc/create-temp.ts

@@ -0,0 +1,10 @@
+import * as tmp from 'tmp';
+
+export function createTemp(): Promise<[string, any]> {
+	return new Promise<[string, any]>((res, rej) => {
+		tmp.file((e, path, fd, cleanup) => {
+			if (e) return rej(e);
+			res([path, cleanup]);
+		});
+	});
+}

packages/backend/src/misc/detect-url-mime.ts

@@ -0,0 +1,15 @@
+import { createTemp } from './create-temp';
+import { downloadUrl } from './download-url';
+import { detectType } from './get-file-info';
+
+export async function detectUrlMime(url: string) {
+	const [path, cleanup] = await createTemp();
+
+	try {
+		await downloadUrl(url, path);
+		const { mime } = await detectType(path);
+		return mime;
+	} finally {
+		cleanup();
+	}
+}

packages/backend/src/misc/download-text-file.ts

@@ -0,0 +1,25 @@
+import * as fs from 'fs';
+import * as util from 'util';
+import Logger from '@/services/logger';
+import { createTemp } from './create-temp';
+import { downloadUrl } from './download-url';
+
+const logger = new Logger('download-text-file');
+
+export async function downloadTextFile(url: string): Promise<string> {
+	// Create temp file
+	const [path, cleanup] = await createTemp();
+
+	logger.info(`Temp file is ${path}`);
+
+	try {
+		// write content at URL to temp file
+		await downloadUrl(url, path);
+
+		const text = await util.promisify(fs.readFile)(path, 'utf8');
+
+		return text;
+	} finally {
+		cleanup();
+	}
+}

packages/backend/src/misc/download-url.ts

@@ -0,0 +1,87 @@
+import * as fs from 'fs';
+import * as stream from 'stream';
+import * as util from 'util';
+import got, * as Got from 'got';
+import { httpAgent, httpsAgent, StatusError } from './fetch';
+import config from '@/config/index';
+import * as chalk from 'chalk';
+import Logger from '@/services/logger';
+import * as IPCIDR from 'ip-cidr';
+const PrivateIp = require('private-ip');
+
+const pipeline = util.promisify(stream.pipeline);
+
+export async function downloadUrl(url: string, path: string) {
+	const logger = new Logger('download');
+
+	logger.info(`Downloading ${chalk.cyan(url)} ...`);
+
+	const timeout = 30 * 1000;
+	const operationTimeout = 60 * 1000;
+	const maxSize = config.maxFileSize || 262144000;
+
+	const req = got.stream(url, {
+		headers: {
+			'User-Agent': config.userAgent
+		},
+		timeout: {
+			lookup: timeout,
+			connect: timeout,
+			secureConnect: timeout,
+			socket: timeout,	// read timeout
+			response: timeout,
+			send: timeout,
+			request: operationTimeout,	// whole operation timeout
+		},
+		agent: {
+			http: httpAgent,
+			https: httpsAgent,
+		},
+		http2: false,	// default
+		retry: 0,
+	}).on('response', (res: Got.Response) => {
+		if ((process.env.NODE_ENV === 'production' || process.env.NODE_ENV === 'test') && !config.proxy && res.ip) {
+			if (isPrivateIp(res.ip)) {
+				logger.warn(`Blocked address: ${res.ip}`);
+				req.destroy();
+			}
+		}
+
+		const contentLength = res.headers['content-length'];
+		if (contentLength != null) {
+			const size = Number(contentLength);
+			if (size > maxSize) {
+				logger.warn(`maxSize exceeded (${size} > ${maxSize}) on response`);
+				req.destroy();
+			}
+		}
+	}).on('downloadProgress', (progress: Got.Progress) => {
+		if (progress.transferred > maxSize) {
+			logger.warn(`maxSize exceeded (${progress.transferred} > ${maxSize}) on downloadProgress`);
+			req.destroy();
+		}
+	});
+
+	try {
+		await pipeline(req, fs.createWriteStream(path));
+	} catch (e) {
+		if (e instanceof Got.HTTPError) {
+			throw new StatusError(`${e.response.statusCode} ${e.response.statusMessage}`, e.response.statusCode, e.response.statusMessage);
+		} else {
+			throw e;
+		}
+	}
+
+	logger.succ(`Download finished: ${chalk.cyan(url)}`);
+}
+
+function isPrivateIp(ip: string) {
+	for (const net of config.allowedPrivateNetworks || []) {
+		const cidr = new IPCIDR(net);
+		if (cidr.contains(ip)) {
+			return false;
+		}
+	}
+
+	return PrivateIp(ip);
+}

packages/backend/src/misc/emoji-regex.ts

@@ -0,0 +1,3 @@
+const twemojiRegex = require('twemoji-parser/dist/lib/regex').default;
+
+export const emojiRegex = new RegExp(`(${twemojiRegex.source})`);

packages/backend/src/misc/extract-custom-emojis-from-mfm.ts

@@ -0,0 +1,10 @@
+import * as mfm from 'mfm-js';
+import { unique } from '@/prelude/array';
+
+export function extractCustomEmojisFromMfm(nodes: mfm.MfmNode[]): string[] {
+	const emojiNodes = mfm.extract(nodes, (node) => {
+		return (node.type === 'emojiCode' && node.props.name.length <= 100);
+	});
+
+	return unique(emojiNodes.map(x => x.props.name));
+}

packages/backend/src/misc/extract-hashtags.ts

@@ -0,0 +1,9 @@
+import * as mfm from 'mfm-js';
+import { unique } from '@/prelude/array';
+
+export function extractHashtags(nodes: mfm.MfmNode[]): string[] {
+	const hashtagNodes = mfm.extract(nodes, (node) => node.type === 'hashtag');
+	const hashtags = unique(hashtagNodes.map(x => x.props.hashtag));
+
+	return hashtags;
+}

packages/backend/src/misc/extract-mentions.ts

@@ -0,0 +1,11 @@
+// test is located in test/extract-mentions
+
+import * as mfm from 'mfm-js';
+
+export function extractMentions(nodes: mfm.MfmNode[]): mfm.MfmMention['props'][] {
+	// TODO: 重複を削除
+	const mentionNodes = mfm.extract(nodes, (node) => node.type === 'mention');
+	const mentions = mentionNodes.map(x => x.props);
+
+	return mentions;
+}

packages/backend/src/misc/fetch-meta.ts

@@ -0,0 +1,35 @@
+import { Meta } from '@/models/entities/meta';
+import { getConnection } from 'typeorm';
+
+let cache: Meta;
+
+export async function fetchMeta(noCache = false): Promise<Meta> {
+	if (!noCache && cache) return cache;
+
+	return await getConnection().transaction(async transactionalEntityManager => {
+		// 過去のバグでレコードが複数出来てしまっている可能性があるので新しいIDを優先する
+		const meta = await transactionalEntityManager.findOne(Meta, {
+			order: {
+				id: 'DESC'
+			}
+		});
+
+		if (meta) {
+			cache = meta;
+			return meta;
+		} else {
+			const saved = await transactionalEntityManager.save(Meta, {
+				id: 'x'
+			}) as Meta;
+
+			cache = saved;
+			return saved;
+		}
+	});
+}
+
+setInterval(() => {
+	fetchMeta(true).then(meta => {
+		cache = meta;
+	});
+}, 1000 * 10);

packages/backend/src/misc/fetch-proxy-account.ts

@@ -0,0 +1,9 @@
+import { fetchMeta } from './fetch-meta';
+import { ILocalUser } from '@/models/entities/user';
+import { Users } from '@/models/index';
+
+export async function fetchProxyAccount(): Promise<ILocalUser | null> {
+	const meta = await fetchMeta();
+	if (meta.proxyAccountId == null) return null;
+	return await Users.findOneOrFail(meta.proxyAccountId) as ILocalUser;
+}

packages/backend/src/misc/fetch.ts

@@ -0,0 +1,141 @@
+import * as http from 'http';
+import * as https from 'https';
+import CacheableLookup from 'cacheable-lookup';
+import fetch from 'node-fetch';
+import { HttpProxyAgent, HttpsProxyAgent } from 'hpagent';
+import config from '@/config/index';
+import { URL } from 'url';
+
+export async function getJson(url: string, accept = 'application/json, */*', timeout = 10000, headers?: Record<string, string>) {
+	const res = await getResponse({
+		url,
+		method: 'GET',
+		headers: Object.assign({
+			'User-Agent': config.userAgent,
+			Accept: accept
+		}, headers || {}),
+		timeout
+	});
+
+	return await res.json();
+}
+
+export async function getHtml(url: string, accept = 'text/html, */*', timeout = 10000, headers?: Record<string, string>) {
+	const res = await getResponse({
+		url,
+		method: 'GET',
+		headers: Object.assign({
+			'User-Agent': config.userAgent,
+			Accept: accept
+		}, headers || {}),
+		timeout
+	});
+
+	return await res.text();
+}
+
+export async function getResponse(args: { url: string, method: string, body?: string, headers: Record<string, string>, timeout?: number, size?: number }) {
+	const timeout = args?.timeout || 10 * 1000;
+
+	const controller = new AbortController();
+	setTimeout(() => {
+		controller.abort();
+	}, timeout * 6);
+
+	const res = await fetch(args.url, {
+		method: args.method,
+		headers: args.headers,
+		body: args.body,
+		timeout,
+		size: args?.size || 10 * 1024 * 1024,
+		agent: getAgentByUrl,
+		signal: controller.signal,
+	});
+
+	if (!res.ok) {
+		throw new StatusError(`${res.status} ${res.statusText}`, res.status, res.statusText);
+	}
+
+	return res;
+}
+
+const cache = new CacheableLookup({
+	maxTtl: 3600,	// 1hours
+	errorTtl: 30,	// 30secs
+	lookup: false,	// nativeのdns.lookupにfallbackしない
+});
+
+/**
+ * Get http non-proxy agent
+ */
+const _http = new http.Agent({
+	keepAlive: true,
+	keepAliveMsecs: 30 * 1000,
+	lookup: cache.lookup,
+} as http.AgentOptions);
+
+/**
+ * Get https non-proxy agent
+ */
+const _https = new https.Agent({
+	keepAlive: true,
+	keepAliveMsecs: 30 * 1000,
+	lookup: cache.lookup,
+} as https.AgentOptions);
+
+const maxSockets = Math.max(256, config.deliverJobConcurrency || 128);
+
+/**
+ * Get http proxy or non-proxy agent
+ */
+export const httpAgent = config.proxy
+	? new HttpProxyAgent({
+		keepAlive: true,
+		keepAliveMsecs: 30 * 1000,
+		maxSockets,
+		maxFreeSockets: 256,
+		scheduling: 'lifo',
+		proxy: config.proxy
+	})
+	: _http;
+
+/**
+ * Get https proxy or non-proxy agent
+ */
+export const httpsAgent = config.proxy
+	? new HttpsProxyAgent({
+		keepAlive: true,
+		keepAliveMsecs: 30 * 1000,
+		maxSockets,
+		maxFreeSockets: 256,
+		scheduling: 'lifo',
+		proxy: config.proxy
+	})
+	: _https;
+
+/**
+ * Get agent by URL
+ * @param url URL
+ * @param bypassProxy Allways bypass proxy
+ */
+export function getAgentByUrl(url: URL, bypassProxy = false) {
+	if (bypassProxy || (config.proxyBypassHosts || []).includes(url.hostname)) {
+		return url.protocol == 'http:' ? _http : _https;
+	} else {
+		return url.protocol == 'http:' ? httpAgent : httpsAgent;
+	}
+}
+
+export class StatusError extends Error {
+	public statusCode: number;
+	public statusMessage?: string;
+	public isClientError: boolean;
+
+	constructor(message: string, statusCode: number, statusMessage?: string) {
+		super(message);
+		this.name = 'StatusError';
+		this.statusCode = statusCode;
+		this.statusMessage = statusMessage;
+		this.isClientError = typeof this.statusCode === 'number' && this.statusCode >= 400 && this.statusCode < 500;
+	}
+}

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

@@ -0,0 +1,90 @@
+/**
+ * Random avatar generator
+ */
+
+import * as p from 'pureimage';
+import * as gen from 'random-seed';
+import { WriteStream } from 'fs';
+
+const size = 256; // px
+const n = 5; // resolution
+const margin = (size / n);
+const colors = [
+	'#e57373',
+	'#F06292',
+	'#BA68C8',
+	'#9575CD',
+	'#7986CB',
+	'#64B5F6',
+	'#4FC3F7',
+	'#4DD0E1',
+	'#4DB6AC',
+	'#81C784',
+	'#8BC34A',
+	'#AFB42B',
+	'#F57F17',
+	'#FF5722',
+	'#795548',
+	'#455A64',
+];
+const bg = '#e9e9e9';
+
+const actualSize = size - (margin * 2);
+const cellSize = actualSize / n;
+const sideN = Math.floor(n / 2);
+
+/**
+ * Generate buffer of random avatar by seed
+ */
+export function genAvatar(seed: string, stream: WriteStream): Promise<void> {
+	const rand = gen.create(seed);
+	const canvas = p.make(size, size);
+	const ctx = canvas.getContext('2d');
+
+	ctx.fillStyle = bg;
+	ctx.beginPath();
+	ctx.fillRect(0, 0, size, size);
+
+	ctx.fillStyle = colors[rand(colors.length)];
+
+	// side bitmap (filled by false)
+	const side: boolean[][] = new Array(sideN);
+	for (let i = 0; i < side.length; i++) {
+		side[i] = new Array(n).fill(false);
+	}
+
+	// 1*n (filled by false)
+	const center: boolean[] = new Array(n).fill(false);
+
+	// tslint:disable-next-line:prefer-for-of
+	for (let x = 0; x < side.length; x++) {
+		for (let y = 0; y < side[x].length; y++) {
+			side[x][y] = rand(3) === 0;
+		}
+	}
+
+	for (let i = 0; i < center.length; i++) {
+		center[i] = rand(3) === 0;
+	}
+
+	// Draw
+	for (let x = 0; x < n; x++) {
+		for (let y = 0; y < n; y++) {
+			const isXCenter = x === ((n - 1) / 2);
+			if (isXCenter && !center[y]) continue;
+
+			const isLeftSide = x < ((n - 1) / 2);
+			if (isLeftSide && !side[x][y]) continue;
+
+			const isRightSide = x > ((n - 1) / 2);
+			if (isRightSide && !side[sideN - (x - sideN)][y]) continue;
+
+			const actualX = margin + (cellSize * x);
+			const actualY = margin + (cellSize * y);
+			ctx.beginPath();
+			ctx.fillRect(actualX, actualY, cellSize, cellSize);
+		}
+	}
+
+	return p.encodePNGToStream(canvas, stream);
+}

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

@@ -0,0 +1,21 @@
+import { ulid } from 'ulid';
+import { genAid } from './id/aid';
+import { genMeid } from './id/meid';
+import { genMeidg } from './id/meidg';
+import { genObjectId } from './id/object-id';
+import config from '@/config/index';
+
+const metohd = config.id.toLowerCase();
+
+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');
+	}
+}

packages/backend/src/misc/gen-key-pair.ts

@@ -0,0 +1,36 @@
+import * as crypto from 'crypto';
+import * as util from 'util';
+
+const generateKeyPair = util.promisify(crypto.generateKeyPair);
+
+export async function genRsaKeyPair(modulusLength = 2048) {
+	return await generateKeyPair('rsa', {
+		modulusLength,
+		publicKeyEncoding: {
+			type: 'spki',
+			format: 'pem'
+		},
+		privateKeyEncoding: {
+			type: 'pkcs8',
+			format: 'pem',
+			cipher: undefined,
+			passphrase: undefined
+		}
+	});
+}
+
+export async function genEcKeyPair(namedCurve: 'prime256v1' | 'secp384r1' | 'secp521r1' | 'curve25519' = 'prime256v1') {
+	return await generateKeyPair('ec', {
+		namedCurve,
+		publicKeyEncoding: {
+			type: 'spki',
+			format: 'pem'
+		},
+		privateKeyEncoding: {
+			type: 'pkcs8',
+			format: 'pem',
+			cipher: undefined,
+			passphrase: undefined
+		}
+	});
+}

packages/backend/src/misc/get-file-info.ts

@@ -0,0 +1,196 @@
+import * as fs from 'fs';
+import * as crypto from 'crypto';
+import * as stream from 'stream';
+import * as util from 'util';
+import * as fileType from 'file-type';
+import isSvg from 'is-svg';
+import * as probeImageSize from 'probe-image-size';
+import * as sharp from 'sharp';
+import { encode } from 'blurhash';
+
+const pipeline = util.promisify(stream.pipeline);
+
+export type FileInfo = {
+	size: number;
+	md5: string;
+	type: {
+		mime: string;
+		ext: string | null;
+	};
+	width?: number;
+	height?: number;
+	blurhash?: string;
+	warnings: string[];
+};
+
+const TYPE_OCTET_STREAM = {
+	mime: 'application/octet-stream',
+	ext: null
+};
+
+const TYPE_SVG = {
+	mime: 'image/svg+xml',
+	ext: 'svg'
+};
+
+/**
+ * Get file information
+ */
+export async function getFileInfo(path: string): Promise<FileInfo> {
+	const warnings = [] as string[];
+
+	const size = await getFileSize(path);
+	const md5 = await calcHash(path);
+
+	let type = await detectType(path);
+
+	// image dimensions
+	let width: number | undefined;
+	let height: number | undefined;
+
+	if (['image/jpeg', 'image/gif', 'image/png', 'image/apng', 'image/webp', 'image/bmp', 'image/tiff', 'image/svg+xml', 'image/vnd.adobe.photoshop'].includes(type.mime)) {
+		const imageSize = await detectImageSize(path).catch(e => {
+			warnings.push(`detectImageSize failed: ${e}`);
+			return undefined;
+		});
+
+		// うまく判定できない画像は octet-stream にする
+		if (!imageSize) {
+			warnings.push(`cannot detect image dimensions`);
+			type = TYPE_OCTET_STREAM;
+		} else if (imageSize.wUnits === 'px') {
+			width = imageSize.width;
+			height = imageSize.height;
+
+			// 制限を超えている画像は octet-stream にする
+			if (imageSize.width > 16383 || imageSize.height > 16383) {
+				warnings.push(`image dimensions exceeds limits`);
+				type = TYPE_OCTET_STREAM;
+			}
+		} else {
+			warnings.push(`unsupported unit type: ${imageSize.wUnits}`);
+		}
+	}
+
+	let blurhash: string | undefined;
+
+	if (['image/jpeg', 'image/gif', 'image/png', 'image/apng', 'image/webp', 'image/svg+xml'].includes(type.mime)) {
+		blurhash = await getBlurhash(path).catch(e => {
+			warnings.push(`getBlurhash failed: ${e}`);
+			return undefined;
+		});
+	}
+
+	return {
+		size,
+		md5,
+		type,
+		width,
+		height,
+		blurhash,
+		warnings,
+	};
+}
+
+/**
+ * Detect MIME Type and extension
+ */
+export async function detectType(path: string) {
+	// Check 0 byte
+	const fileSize = await getFileSize(path);
+	if (fileSize === 0) {
+		return TYPE_OCTET_STREAM;
+	}
+
+	const type = await fileType.fromFile(path);
+
+	if (type) {
+		// XMLはSVGかもしれない
+		if (type.mime === 'application/xml' && await checkSvg(path)) {
+			return TYPE_SVG;
+		}
+
+		return {
+			mime: type.mime,
+			ext: type.ext
+		};
+	}
+
+	// 種類が不明でもSVGかもしれない
+	if (await checkSvg(path)) {
+		return TYPE_SVG;
+	}
+
+	// それでも種類が不明なら application/octet-stream にする
+	return TYPE_OCTET_STREAM;
+}
+
+/**
+ * Check the file is SVG or not
+ */
+export async function checkSvg(path: string) {
+	try {
+		const size = await getFileSize(path);
+		if (size > 1 * 1024 * 1024) return false;
+		return isSvg(fs.readFileSync(path));
+	} catch {
+		return false;
+	}
+}
+
+/**
+ * Get file size
+ */
+export async function getFileSize(path: string): Promise<number> {
+	const getStat = util.promisify(fs.stat);
+	return (await getStat(path)).size;
+}
+
+/**
+ * Calculate MD5 hash
+ */
+async function calcHash(path: string): Promise<string> {
+	const hash = crypto.createHash('md5').setEncoding('hex');
+	await pipeline(fs.createReadStream(path), hash);
+	return hash.read();
+}
+
+/**
+ * Detect dimensions of image
+ */
+async function detectImageSize(path: string): Promise<{
+	width: number;
+	height: number;
+	wUnits: string;
+	hUnits: string;
+}> {
+	const readable = fs.createReadStream(path);
+	const imageSize = await probeImageSize(readable);
+	readable.destroy();
+	return imageSize;
+}
+
+/**
+ * Calculate average color of image
+ */
+function getBlurhash(path: string): Promise<string> {
+	return new Promise((resolve, reject) => {
+		sharp(path)
+			.raw()
+			.ensureAlpha()
+			.resize(64, 64, { fit: 'inside' })
+			.toBuffer((err, buffer, { width, height }) => {
+				if (err) return reject(err);
+
+				let hash;
+
+				try {
+					hash = encode(new Uint8ClampedArray(buffer), width, height, 7, 7);
+				} catch (e) {
+					return reject(e);
+				}
+
+				resolve(hash);
+			});
+	});
+}

packages/backend/src/misc/get-note-summary.ts

@@ -0,0 +1,54 @@
+import { Packed } from './schema';
+
+/**
+ * 投稿を表す文字列を取得します。
+ * @param {*} note (packされた)投稿
+ */
+export const getNoteSummary = (note: Packed<'Note'>): string => {
+	if (note.deletedAt) {
+		return `(❌⛔)`;
+	}
+
+	if (note.isHidden) {
+		return `(⛔)`;
+	}
+
+	let summary = '';
+
+	// 本文
+	if (note.cw != null) {
+		summary += note.cw;
+	} else {
+		summary += note.text ? note.text : '';
+	}
+
+	// ファイルが添付されているとき
+	if ((note.files || []).length != 0) {
+		summary += ` (📎${note.files!.length})`;
+	}
+
+	// 投票が添付されているとき
+	if (note.poll) {
+		summary += ` (📊)`;
+	}
+
+	// 返信のとき
+	if (note.replyId) {
+		if (note.reply) {
+			summary += `\n\nRE: ${getNoteSummary(note.reply)}`;
+		} else {
+			summary += '\n\nRE: ...';
+		}
+	}
+
+	// Renoteのとき
+	if (note.renoteId) {
+		if (note.renote) {
+			summary += `\n\nRN: ${getNoteSummary(note.renote)}`;
+		} else {
+			summary += '\n\nRN: ...';
+		}
+	}
+
+	return summary.trim();
+};

packages/backend/src/misc/get-reaction-emoji.ts

@@ -0,0 +1,16 @@
+export default function(reaction: string): string {
+	switch (reaction) {
+		case 'like': return '👍';
+		case 'love': return '❤️';
+		case 'laugh': return '😆';
+		case 'hmm': return '🤔';
+		case 'surprise': return '😮';
+		case 'congrats': return '🎉';
+		case 'angry': return '💢';
+		case 'confused': return '😥';
+		case 'rip': return '😇';
+		case 'pudding': return '🍮';
+		case 'star': return '⭐';
+		default: return reaction;
+	}
+}

packages/backend/src/misc/hard-limits.ts

@@ -0,0 +1,14 @@
+
+// If you change DB_* values, you must also change the DB schema.
+
+/**
+ * Maximum note text length that can be stored in DB.
+ * Surrogate pairs count as one
+ */
+export const DB_MAX_NOTE_TEXT_LENGTH = 8192;
+
+/**
+ * Maximum image description length that can be stored in DB.
+ * Surrogate pairs count as one
+ */
+export const DB_MAX_IMAGE_COMMENT_LENGTH = 512;

packages/backend/src/misc/i18n.ts

@@ -0,0 +1,29 @@
+export class I18n<T extends Record<string, any>> {
+	public locale: T;
+
+	constructor(locale: T) {
+		this.locale = locale;
+
+		//#region BIND
+		this.t = this.t.bind(this);
+		//#endregion
+	}
+
+	// string にしているのは、ドット区切りでのパス指定を許可するため
+	// なるべくこのメソッド使うよりもlocale直接参照の方がvueのキャッシュ効いてパフォーマンスが良いかも
+	public t(key: string, args?: Record<string, any>): string {
+		try {
+			let str = key.split('.').reduce((o, i) => o[i], this.locale) as string;
+
+			if (args) {
+				for (const [k, v] of Object.entries(args)) {
+					str = str.replace(`{${k}}`, v);
+				}
+			}
+			return str;
+		} catch (e) {
+			console.warn(`missing localization '${key}'`);
+			return key;
+		}
+	}
+}

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

@@ -0,0 +1,25 @@
+// 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 '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

@@ -0,0 +1,26 @@
+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

@@ -0,0 +1,28 @@
+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

@@ -0,0 +1,26 @@
+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();
+}

packages/backend/src/misc/identifiable-error.ts

@@ -0,0 +1,13 @@
+/**
+ * ID付きエラー
+ */
+export class IdentifiableError extends Error {
+	public message: string;
+	public id: string;
+
+	constructor(id: string, message?: string) {
+		super(message);
+		this.message = message || '';
+		this.id = id;
+	}
+}

packages/backend/src/misc/is-blocker-user-related.ts

@@ -0,0 +1,15 @@
+export function isBlockerUserRelated(note: any, blockerUserIds: Set<string>): boolean {
+	if (blockerUserIds.has(note.userId)) {
+		return true;
+	}
+
+	if (note.reply != null && blockerUserIds.has(note.reply.userId)) {
+		return true;
+	}
+
+	if (note.renote != null && blockerUserIds.has(note.renote.userId)) {
+		return true;
+	}
+
+	return false;
+}

packages/backend/src/misc/is-duplicate-key-value-error.ts

@@ -0,0 +1,3 @@
+export function isDuplicateKeyValueError(e: Error): boolean {
+	return e.message.startsWith('duplicate key value');
+}

packages/backend/src/misc/is-muted-user-related.ts

@@ -0,0 +1,15 @@
+export function isMutedUserRelated(note: any, mutedUserIds: Set<string>): boolean {
+	if (mutedUserIds.has(note.userId)) {
+		return true;
+	}
+
+	if (note.reply != null && mutedUserIds.has(note.reply.userId)) {
+		return true;
+	}
+
+	if (note.renote != null && mutedUserIds.has(note.renote.userId)) {
+		return true;
+	}
+
+	return false;
+}

packages/backend/src/misc/is-quote.ts

@@ -0,0 +1,5 @@
+import { Note } from '@/models/entities/note';
+
+export default function(note: Note): boolean {
+	return note.renoteId != null && (note.text != null || note.hasPoll || (note.fileIds != null && note.fileIds.length > 0));
+}

packages/backend/src/misc/keypair-store.ts

@@ -0,0 +1,10 @@
+import { UserKeypairs } from '@/models/index';
+import { User } from '@/models/entities/user';
+import { UserKeypair } from '@/models/entities/user-keypair';
+import { Cache } from './cache';
+
+const cache = new Cache<UserKeypair>(Infinity);
+
+export async function getUserKeypair(userId: User['id']): Promise<UserKeypair> {
+	return await cache.fetch(userId, () => UserKeypairs.findOneOrFail(userId));
+}

packages/backend/src/misc/normalize-for-search.ts

@@ -0,0 +1,6 @@
+export function normalizeForSearch(tag: string): string {
+	// ref.
+	// - https://analytics-note.xyz/programming/unicode-normalization-forms/
+	// - https://maku77.github.io/js/string/normalize.html
+	return tag.normalize('NFKC').toLowerCase();
+}

packages/backend/src/misc/nyaize.ts

@@ -0,0 +1,15 @@
+export function nyaize(text: string): string {
+	return text
+		// ja-JP
+		.replace(/な/g, 'にゃ').replace(/ナ/g, 'ニャ').replace(/ﾅ/g, 'ﾆｬ')
+		// en-US
+		.replace(/(?<=n)a/gi, x => x === 'A' ? 'YA' : 'ya')
+		.replace(/(?<=morn)ing/gi, x => x === 'ING' ? 'YAN' : 'yan')
+		.replace(/(?<=every)one/gi, x => x === 'ONE' ? 'NYAN' : 'nyan')
+		// ko-KR
+		.replace(/[나-낳]/g, match => String.fromCharCode(
+			match.charCodeAt(0)! + '냐'.charCodeAt(0) - '나'.charCodeAt(0)
+		))
+		.replace(/(다$)|(다(?=\.))|(다(?= ))|(다(?=!))|(다(?=\?))/gm, '다냥')
+		.replace(/(야(?=\?))|(야$)|(야(?= ))/gm, '냥');
+}

packages/backend/src/misc/populate-emojis.ts

@@ -0,0 +1,124 @@
+import { In } from 'typeorm';
+import { Emojis } from '@/models/index';
+import { Emoji } from '@/models/entities/emoji';
+import { Note } from '@/models/entities/note';
+import { Cache } from './cache';
+import { isSelfHost, toPunyNullable } from './convert-host';
+import { decodeReaction } from './reaction-lib';
+import config from '@/config/index';
+import { query } from '@/prelude/url';
+
+const cache = new Cache<Emoji | null>(1000 * 60 * 60 * 12);
+
+/**
+ * 添付用絵文字情報
+ */
+type PopulatedEmoji = {
+	name: string;
+	url: string;
+};
+
+function normalizeHost(src: string | undefined, noteUserHost: string | null): string | null {
+	// クエリに使うホスト
+	let host = src === '.' ? null	// .はローカルホスト (ここがマッチするのはリアクションのみ)
+		: src === undefined ? noteUserHost	// ノートなどでホスト省略表記の場合はローカルホスト (ここがリアクションにマッチすることはない)
+		: isSelfHost(src) ? null	// 自ホスト指定
+		: (src || noteUserHost);	// 指定されたホスト || ノートなどの所有者のホスト (こっちがリアクションにマッチすることはない)
+
+	host = toPunyNullable(host);
+
+	return host;
+}
+
+function parseEmojiStr(emojiName: string, noteUserHost: string | null) {
+	const match = emojiName.match(/^(\w+)(?:@([\w.-]+))?$/);
+	if (!match) return { name: null, host: null };
+
+	const name = match[1];
+
+	// ホスト正規化
+	const host = toPunyNullable(normalizeHost(match[2], noteUserHost));
+
+	return { name, host };
+}
+
+/**
+ * 添付用絵文字情報を解決する
+ * @param emojiName ノートやユーザープロフィールに添付された、またはリアクションのカスタム絵文字名 (:は含めない, リアクションでローカルホストの場合は@.を付ける (これはdecodeReactionで可能))
+ * @param noteUserHost ノートやユーザープロフィールの所有者のホスト
+ * @returns 絵文字情報, nullは未マッチを意味する
+ */
+export async function populateEmoji(emojiName: string, noteUserHost: string | null): Promise<PopulatedEmoji | null> {
+	const { name, host } = parseEmojiStr(emojiName, noteUserHost);
+	if (name == null) return null;
+
+	const queryOrNull = async () => (await Emojis.findOne({
+		name,
+		host
+	})) || null;
+
+	const emoji = await cache.fetch(`${name} ${host}`, queryOrNull);
+
+	if (emoji == null) return null;
+
+	const isLocal = emoji.host == null;
+	const url = isLocal ? emoji.url : `${config.url}/proxy/image.png?${query({url: emoji.url})}`;
+
+	return {
+		name: emojiName,
+		url,
+	};
+}
+
+/**
+ * 複数の添付用絵文字情報を解決する (キャシュ付き, 存在しないものは結果から除外される)
+ */
+export async function populateEmojis(emojiNames: string[], noteUserHost: string | null): Promise<PopulatedEmoji[]> {
+	const emojis = await Promise.all(emojiNames.map(x => populateEmoji(x, noteUserHost)));
+	return emojis.filter((x): x is PopulatedEmoji => x != null);
+}
+
+export function aggregateNoteEmojis(notes: Note[]) {
+	let emojis: { name: string | null; host: string | null; }[] = [];
+	for (const note of notes) {
+		emojis = emojis.concat(note.emojis
+			.map(e => parseEmojiStr(e, note.userHost)));
+		if (note.renote) {
+			emojis = emojis.concat(note.renote.emojis
+				.map(e => parseEmojiStr(e, note.renote!.userHost)));
+			if (note.renote.user) {
+				emojis = emojis.concat(note.renote.user.emojis
+					.map(e => parseEmojiStr(e, note.renote!.userHost)));
+			}
+		}
+		const customReactions = Object.keys(note.reactions).map(x => decodeReaction(x)).filter(x => x.name != null) as typeof emojis;
+		emojis = emojis.concat(customReactions);
+		if (note.user) {
+			emojis = emojis.concat(note.user.emojis
+				.map(e => parseEmojiStr(e, note.userHost)));
+		}
+	}
+	return emojis.filter(x => x.name != null) as { name: string; host: string | null; }[];
+}
+
+/**
+ * 与えられた絵文字のリストをデータベースから取得し、キャッシュに追加します
+ */
+export async function prefetchEmojis(emojis: { name: string; host: string | null; }[]): Promise<void> {
+	const notCachedEmojis = emojis.filter(emoji => cache.get(`${emoji.name} ${emoji.host}`) == null);
+	const emojisQuery: any[] = [];
+	const hosts = new Set(notCachedEmojis.map(e => e.host));
+	for (const host of hosts) {
+		emojisQuery.push({
+			name: In(notCachedEmojis.filter(e => e.host === host).map(e => e.name)),
+			host: host
+		});
+	}
+	const _emojis = emojisQuery.length > 0 ? await Emojis.find({
+		where: emojisQuery,
+		select: ['name', 'host', 'url']
+	}) : [];
+	for (const emoji of _emojis) {
+		cache.set(`${emoji.name} ${emoji.host}`, emoji);
+	}
+}

packages/backend/src/misc/reaction-lib.ts

@@ -0,0 +1,129 @@
+import { emojiRegex } from './emoji-regex';
+import { fetchMeta } from './fetch-meta';
+import { Emojis } from '@/models/index';
+import { toPunyNullable } from './convert-host';
+
+const legacies: Record<string, string> = {
+	'like':     '👍',
+	'love':     '❤', // ここに記述する場合は異体字セレクタを入れない
+	'laugh':    '😆',
+	'hmm':      '🤔',
+	'surprise': '😮',
+	'congrats': '🎉',
+	'angry':    '💢',
+	'confused': '😥',
+	'rip':      '😇',
+	'pudding':  '🍮',
+	'star':     '⭐',
+};
+
+export async function getFallbackReaction(): Promise<string> {
+	const meta = await fetchMeta();
+	return meta.useStarForReactionFallback ? '⭐' : '👍';
+}
+
+export function convertLegacyReactions(reactions: Record<string, number>) {
+	const _reactions = {} as Record<string, number>;
+
+	for (const reaction of Object.keys(reactions)) {
+		if (reactions[reaction] <= 0) continue;
+
+		if (Object.keys(legacies).includes(reaction)) {
+			if (_reactions[legacies[reaction]]) {
+				_reactions[legacies[reaction]] += reactions[reaction];
+			} else {
+				_reactions[legacies[reaction]] = reactions[reaction];
+			}
+		} else {
+			if (_reactions[reaction]) {
+				_reactions[reaction] += reactions[reaction];
+			} else {
+				_reactions[reaction] = reactions[reaction];
+			}
+		}
+	}
+
+	const _reactions2 = {} as Record<string, number>;
+
+	for (const reaction of Object.keys(_reactions)) {
+		_reactions2[decodeReaction(reaction).reaction] = _reactions[reaction];
+	}
+
+	return _reactions2;
+}
+
+export async function toDbReaction(reaction?: string | null, reacterHost?: string | null): Promise<string> {
+	if (reaction == null) return await getFallbackReaction();
+
+	reacterHost = toPunyNullable(reacterHost);
+
+	// 文字列タイプのリアクションを絵文字に変換
+	if (Object.keys(legacies).includes(reaction)) return legacies[reaction];
+
+	// Unicode絵文字
+	const match = emojiRegex.exec(reaction);
+	if (match) {
+		// 合字を含む1つの絵文字
+		const unicode = match[0];
+
+		// 異体字セレクタ除去
+		return unicode.match('\u200d') ? unicode : unicode.replace(/\ufe0f/g, '');
+	}
+
+	const custom = reaction.match(/^:([\w+-]+)(?:@\.)?:$/);
+	if (custom) {
+		const name = custom[1];
+		const emoji = await Emojis.findOne({
+			host: reacterHost || null,
+			name,
+		});
+
+		if (emoji) return reacterHost ? `:${name}@${reacterHost}:` : `:${name}:`;
+	}
+
+	return await getFallbackReaction();
+}
+
+type DecodedReaction = {
+	/**
+	 * リアクション名 (Unicode Emoji or ':name@hostname' or ':name@.')
+	 */
+	reaction: string;
+
+	/**
+	 * name (カスタム絵文字の場合name, Emojiクエリに使う)
+	 */
+	name?: string;
+
+	/**
+	 * host (カスタム絵文字の場合host, Emojiクエリに使う)
+	 */
+	host?: string | null;
+};
+
+export function decodeReaction(str: string): DecodedReaction {
+	const custom = str.match(/^:([\w+-]+)(?:@([\w.-]+))?:$/);
+
+	if (custom) {
+		const name = custom[1];
+		const host = custom[2] || null;
+
+		return {
+			reaction: `:${name}@${host || '.'}:`,	// ローカル分は@以降を省略するのではなく.にする
+			name,
+			host
+		};
+	}
+
+	return {
+		reaction: str,
+		name: undefined,
+		host: undefined
+	};
+}
+
+export function convertLegacyReaction(reaction: string): string {
+	reaction = decodeReaction(reaction).reaction;
+	if (Object.keys(legacies).includes(reaction)) return legacies[reaction];
+	return reaction;
+}

packages/backend/src/misc/safe-for-sql.ts

@@ -0,0 +1,3 @@
+export function safeForSql(text: string): boolean {
+	return !/[\0\x08\x09\x1a\n\r"'\\\%]/g.test(text);
+}

packages/backend/src/misc/schema.ts

@@ -0,0 +1,107 @@
+import { SimpleObj, SimpleSchema } from './simple-schema';
+import { packedUserSchema } from '@/models/repositories/user';
+import { packedNoteSchema } from '@/models/repositories/note';
+import { packedUserListSchema } from '@/models/repositories/user-list';
+import { packedAppSchema } from '@/models/repositories/app';
+import { packedMessagingMessageSchema } from '@/models/repositories/messaging-message';
+import { packedNotificationSchema } from '@/models/repositories/notification';
+import { packedDriveFileSchema } from '@/models/repositories/drive-file';
+import { packedDriveFolderSchema } from '@/models/repositories/drive-folder';
+import { packedFollowingSchema } from '@/models/repositories/following';
+import { packedMutingSchema } from '@/models/repositories/muting';
+import { packedBlockingSchema } from '@/models/repositories/blocking';
+import { packedNoteReactionSchema } from '@/models/repositories/note-reaction';
+import { packedHashtagSchema } from '@/models/repositories/hashtag';
+import { packedPageSchema } from '@/models/repositories/page';
+import { packedUserGroupSchema } from '@/models/repositories/user-group';
+import { packedNoteFavoriteSchema } from '@/models/repositories/note-favorite';
+import { packedChannelSchema } from '@/models/repositories/channel';
+import { packedAntennaSchema } from '@/models/repositories/antenna';
+import { packedClipSchema } from '@/models/repositories/clip';
+import { packedFederationInstanceSchema } from '@/models/repositories/federation-instance';
+import { packedQueueCountSchema } from '@/models/repositories/queue';
+import { packedGalleryPostSchema } from '@/models/repositories/gallery-post';
+import { packedEmojiSchema } from '@/models/repositories/emoji';
+import { packedReversiGameSchema } from '@/models/repositories/games/reversi/game';
+import { packedReversiMatchingSchema } from '@/models/repositories/games/reversi/matching';
+
+export const refs = {
+	User: packedUserSchema,
+	UserList: packedUserListSchema,
+	UserGroup: packedUserGroupSchema,
+	App: packedAppSchema,
+	MessagingMessage: packedMessagingMessageSchema,
+	Note: packedNoteSchema,
+	NoteReaction: packedNoteReactionSchema,
+	NoteFavorite: packedNoteFavoriteSchema,
+	Notification: packedNotificationSchema,
+	DriveFile: packedDriveFileSchema,
+	DriveFolder: packedDriveFolderSchema,
+	Following: packedFollowingSchema,
+	Muting: packedMutingSchema,
+	Blocking: packedBlockingSchema,
+	Hashtag: packedHashtagSchema,
+	Page: packedPageSchema,
+	Channel: packedChannelSchema,
+	QueueCount: packedQueueCountSchema,
+	Antenna: packedAntennaSchema,
+	Clip: packedClipSchema,
+	FederationInstance: packedFederationInstanceSchema,
+	GalleryPost: packedGalleryPostSchema,
+	Emoji: packedEmojiSchema,
+	ReversiGame: packedReversiGameSchema,
+	ReversiMatching: packedReversiMatchingSchema,
+};
+
+export type Packed<x extends keyof typeof refs> = ObjType<(typeof refs[x])['properties']>;
+
+export interface Schema extends SimpleSchema {
+	items?: Schema;
+	properties?: Obj;
+	ref?: keyof typeof refs;
+}
+
+type NonUndefinedPropertyNames<T extends Obj> = {
+	[K in keyof T]: T[K]['optional'] extends true ? never : K
+}[keyof T];
+
+type UndefinedPropertyNames<T extends Obj> = {
+	[K in keyof T]: T[K]['optional'] extends true ? K : never
+}[keyof T];
+
+type OnlyRequired<T extends Obj> = Pick<T, NonUndefinedPropertyNames<T>>;
+type OnlyOptional<T extends Obj> = Pick<T, UndefinedPropertyNames<T>>;
+
+export interface Obj extends SimpleObj { [key: string]: Schema; }
+
+export type ObjType<s extends Obj> =
+	{ [P in keyof OnlyOptional<s>]?: SchemaType<s[P]> } &
+	{ [P in keyof OnlyRequired<s>]: SchemaType<s[P]> };
+
+// https://qiita.com/hrsh7th@github/items/84e8968c3601009cdcf2
+type MyType<T extends Schema> = {
+	0: any;
+	1: SchemaType<T>;
+}[T extends Schema ? 1 : 0];
+
+type NullOrUndefined<p extends Schema, T> =
+	p['nullable'] extends true
+		?	p['optional'] extends true
+			? (T | null | undefined)
+			: (T | null)
+		: p['optional'] extends true
+			? (T | undefined)
+			: T;
+
+export type SchemaType<p extends Schema> =
+	p['type'] extends 'number' ? NullOrUndefined<p, number> :
+	p['type'] extends 'string' ? NullOrUndefined<p, string> :
+	p['type'] extends 'boolean' ? NullOrUndefined<p, boolean> :
+	p['type'] extends 'array' ? NullOrUndefined<p, MyType<NonNullable<p['items']>>[]> :
+	p['type'] extends 'object' ? (
+		p['ref'] extends keyof typeof refs
+			? NullOrUndefined<p, Packed<p['ref']>>
+			: NullOrUndefined<p, ObjType<NonNullable<p['properties']>>>
+	) :
+	p['type'] extends 'any' ? NullOrUndefined<p, any> :
+	any;

packages/backend/src/misc/secure-rndstr.ts

@@ -0,0 +1,21 @@
+import * as crypto from 'crypto';
+
+const L_CHARS = '0123456789abcdefghijklmnopqrstuvwxyz';
+const LU_CHARS = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+
+export function secureRndstr(length = 32, useLU = true): string {
+	const chars = useLU ? LU_CHARS : L_CHARS;
+	const chars_len = chars.length;
+
+	let str = '';
+
+	for (let i = 0; i < length; i++) {
+		let rand = Math.floor((crypto.randomBytes(1).readUInt8(0) / 0xFF) * chars_len);
+		if (rand === chars_len) {
+			rand = chars_len - 1;
+		}
+		str += chars.charAt(rand);
+	}
+
+	return str;
+}

packages/backend/src/misc/show-machine-info.ts

@@ -0,0 +1,13 @@
+import * as os from 'os';
+import * as sysUtils from 'systeminformation';
+import Logger from '@/services/logger';
+
+export async function showMachineInfo(parentLogger: Logger) {
+	const logger = parentLogger.createSubLogger('machine');
+	logger.debug(`Hostname: ${os.hostname()}`);
+	logger.debug(`Platform: ${process.platform} Arch: ${process.arch}`);
+	const mem = await sysUtils.mem();
+	const totalmem = (mem.total / 1024 / 1024 / 1024).toFixed(1);
+	const availmem = (mem.available / 1024 / 1024 / 1024).toFixed(1);
+	logger.debug(`CPU: ${os.cpus().length} core MEM: ${totalmem}GB (available: ${availmem}GB)`);
+}

packages/backend/src/misc/simple-schema.ts

@@ -0,0 +1,15 @@
+export interface SimpleSchema {
+	type: 'boolean' | 'number' | 'string' | 'array' | 'object' | 'any';
+	nullable: boolean;
+	optional: boolean;
+	items?: SimpleSchema;
+	properties?: SimpleObj;
+	description?: string;
+	example?: any;
+	format?: string;
+	ref?: string;
+	enum?: string[];
+	default?: boolean | null;
+}
+
+export interface SimpleObj { [key: string]: SimpleSchema; }

packages/backend/src/misc/truncate.ts

@@ -0,0 +1,11 @@
+import { substring } from 'stringz';
+
+export function truncate(input: string, size: number): string;
+export function truncate(input: string | undefined, size: number): string | undefined;
+export function truncate(input: string | undefined, size: number): string | undefined {
+	if (!input) {
+		return input;
+	} else {
+		return substring(input, 0, size);
+	}
+}

packages/backend/src/models/entities/abuse-user-report.ts

@@ -0,0 +1,74 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+export class AbuseUserReport {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the AbuseUserReport.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column(id())
+	public targetUserId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public targetUser: User | null;
+
+	@Index()
+	@Column(id())
+	public reporterId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public reporter: User | null;
+
+	@Column({
+		...id(),
+		nullable: true
+	})
+	public assigneeId: User['id'] | null;
+
+	@ManyToOne(type => User, {
+		onDelete: 'SET NULL'
+	})
+	@JoinColumn()
+	public assignee: User | null;
+
+	@Index()
+	@Column('boolean', {
+		default: false
+	})
+	public resolved: boolean;
+
+	@Column('varchar', {
+		length: 2048,
+	})
+	public comment: string;
+
+	//#region Denormalized fields
+	@Index()
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public targetUserHost: string | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public reporterHost: string | null;
+	//#endregion
+}

packages/backend/src/models/entities/access-token.ts

@@ -0,0 +1,96 @@
+import { Entity, PrimaryColumn, Index, Column, ManyToOne, JoinColumn } from 'typeorm';
+import { User } from './user';
+import { App } from './app';
+import { id } from '../id';
+
+@Entity()
+export class AccessToken {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the AccessToken.'
+	})
+	public createdAt: Date;
+
+	@Column('timestamp with time zone', {
+		nullable: true,
+		default: null,
+	})
+	public lastUsedAt: Date | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 128
+	})
+	public token: string;
+
+	@Index()
+	@Column('varchar', {
+		length: 128,
+		nullable: true,
+		default: null
+	})
+	public session: string | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 128
+	})
+	public hash: string;
+
+	@Index()
+	@Column(id())
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Column({
+		...id(),
+		nullable: true,
+		default: null
+	})
+	public appId: App['id'] | null;
+
+	@ManyToOne(type => App, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public app: App | null;
+
+	@Column('varchar', {
+		length: 128,
+		nullable: true,
+		default: null
+	})
+	public name: string | null;
+
+	@Column('varchar', {
+		length: 512,
+		nullable: true,
+		default: null
+	})
+	public description: string | null;
+
+	@Column('varchar', {
+		length: 512,
+		nullable: true,
+		default: null
+	})
+	public iconUrl: string | null;
+
+	@Column('varchar', {
+		length: 64, array: true,
+		default: '{}'
+	})
+	public permission: string[];
+
+	@Column('boolean', {
+		default: false
+	})
+	public fetched: boolean;
+}

packages/backend/src/models/entities/ad.ts

@@ -0,0 +1,59 @@
+import { Entity, Index, Column, PrimaryColumn } from 'typeorm';
+import { id } from '../id';
+
+@Entity()
+export class Ad {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the Ad.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The expired date of the Ad.'
+	})
+	public expiresAt: Date;
+
+	@Column('varchar', {
+		length: 32, nullable: false
+	})
+	public place: string;
+
+	// 今は使われていないが将来的に活用される可能性はある
+	@Column('varchar', {
+		length: 32, nullable: false
+	})
+	public priority: string;
+
+	@Column('integer', {
+		default: 1, nullable: false
+	})
+	public ratio: number;
+
+	@Column('varchar', {
+		length: 1024, nullable: false
+	})
+	public url: string;
+
+	@Column('varchar', {
+		length: 1024, nullable: false
+	})
+	public imageUrl: string;
+
+	@Column('varchar', {
+		length: 8192, nullable: false
+	})
+	public memo: string;
+
+	constructor(data: Partial<Ad>) {
+		if (data == null) return;
+
+		for (const [k, v] of Object.entries(data)) {
+			(this as any)[k] = v;
+		}
+	}
+}

packages/backend/src/models/entities/announcement-read.ts

@@ -0,0 +1,36 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { Announcement } from './announcement';
+import { id } from '../id';
+
+@Entity()
+@Index(['userId', 'announcementId'], { unique: true })
+export class AnnouncementRead {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the AnnouncementRead.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column(id())
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Index()
+	@Column(id())
+	public announcementId: Announcement['id'];
+
+	@ManyToOne(type => Announcement, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public announcement: Announcement | null;
+}

packages/backend/src/models/entities/announcement.ts

@@ -0,0 +1,43 @@
+import { Entity, Index, Column, PrimaryColumn } from 'typeorm';
+import { id } from '../id';
+
+@Entity()
+export class Announcement {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the Announcement.'
+	})
+	public createdAt: Date;
+
+	@Column('timestamp with time zone', {
+		comment: 'The updated date of the Announcement.',
+		nullable: true
+	})
+	public updatedAt: Date | null;
+
+	@Column('varchar', {
+		length: 8192, nullable: false
+	})
+	public text: string;
+
+	@Column('varchar', {
+		length: 256, nullable: false
+	})
+	public title: string;
+
+	@Column('varchar', {
+		length: 1024, nullable: true
+	})
+	public imageUrl: string | null;
+
+	constructor(data: Partial<Announcement>) {
+		if (data == null) return;
+
+		for (const [k, v] of Object.entries(data)) {
+			(this as any)[k] = v;
+		}
+	}
+}

packages/backend/src/models/entities/antenna-note.ts

@@ -0,0 +1,43 @@
+import { Entity, Index, JoinColumn, Column, ManyToOne, PrimaryColumn } from 'typeorm';
+import { Note } from './note';
+import { Antenna } from './antenna';
+import { id } from '../id';
+
+@Entity()
+@Index(['noteId', 'antennaId'], { unique: true })
+export class AntennaNote {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The note ID.'
+	})
+	public noteId: Note['id'];
+
+	@ManyToOne(type => Note, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public note: Note | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The antenna ID.'
+	})
+	public antennaId: Antenna['id'];
+
+	@ManyToOne(type => Antenna, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public antenna: Antenna | null;
+
+	@Index()
+	@Column('boolean', {
+		default: false
+	})
+	public read: boolean;
+}

packages/backend/src/models/entities/antenna.ts

@@ -0,0 +1,99 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+import { UserList } from './user-list';
+import { UserGroupJoining } from './user-group-joining';
+
+@Entity()
+export class Antenna {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the Antenna.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The owner ID.'
+	})
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Column('varchar', {
+		length: 128,
+		comment: 'The name of the Antenna.'
+	})
+	public name: string;
+
+	@Column('enum', { enum: ['home', 'all', 'users', 'list', 'group'] })
+	public src: 'home' | 'all' | 'users' | 'list' | 'group';
+
+	@Column({
+		...id(),
+		nullable: true
+	})
+	public userListId: UserList['id'] | null;
+
+	@ManyToOne(type => UserList, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public userList: UserList | null;
+
+	@Column({
+		...id(),
+		nullable: true
+	})
+	public userGroupJoiningId: UserGroupJoining['id'] | null;
+
+	@ManyToOne(type => UserGroupJoining, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public userGroupJoining: UserGroupJoining | null;
+
+	@Column('varchar', {
+		length: 1024, array: true,
+		default: '{}'
+	})
+	public users: string[];
+
+	@Column('jsonb', {
+		default: []
+	})
+	public keywords: string[][];
+
+	@Column('jsonb', {
+		default: []
+	})
+	public excludeKeywords: string[][];
+
+	@Column('boolean', {
+		default: false
+	})
+	public caseSensitive: boolean;
+
+	@Column('boolean', {
+		default: false
+	})
+	public withReplies: boolean;
+
+	@Column('boolean')
+	public withFile: boolean;
+
+	@Column('varchar', {
+		length: 2048, nullable: true,
+	})
+	public expression: string | null;
+
+	@Column('boolean')
+	public notify: boolean;
+}

packages/backend/src/models/entities/app.ts

@@ -0,0 +1,60 @@
+import { Entity, PrimaryColumn, Column, Index, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+export class App {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the App.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The owner ID.'
+	})
+	public userId: User['id'] | null;
+
+	@ManyToOne(type => User, {
+		onDelete: 'SET NULL',
+		nullable: true,
+	})
+	public user: User | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 64,
+		comment: 'The secret key of the App.'
+	})
+	public secret: string;
+
+	@Column('varchar', {
+		length: 128,
+		comment: 'The name of the App.'
+	})
+	public name: string;
+
+	@Column('varchar', {
+		length: 512,
+		comment: 'The description of the App.'
+	})
+	public description: string;
+
+	@Column('varchar', {
+		length: 64, array: true,
+		comment: 'The permission of the App.'
+	})
+	public permission: string[];
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: 'The callbackUrl of the App.'
+	})
+	public callbackUrl: string | null;
+}

packages/backend/src/models/entities/attestation-challenge.ts

@@ -0,0 +1,46 @@
+import { PrimaryColumn, Entity, JoinColumn, Column, ManyToOne, Index } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+export class AttestationChallenge {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@PrimaryColumn(id())
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 64,
+		comment: 'Hex-encoded sha256 hash of the challenge.'
+	})
+	public challenge: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The date challenge was created for expiry purposes.'
+	})
+	public createdAt: Date;
+
+	@Column('boolean', {
+		comment:
+			'Indicates that the challenge is only for registration purposes if true to prevent the challenge for being used as authentication.',
+		default: false
+	})
+	public registrationChallenge: boolean;
+
+	constructor(data: Partial<AttestationChallenge>) {
+		if (data == null) return;
+
+		for (const [k, v] of Object.entries(data)) {
+			(this as any)[k] = v;
+		}
+	}
+}

packages/backend/src/models/entities/auth-session.ts

@@ -0,0 +1,43 @@
+import { Entity, PrimaryColumn, Index, Column, ManyToOne, JoinColumn } from 'typeorm';
+import { User } from './user';
+import { App } from './app';
+import { id } from '../id';
+
+@Entity()
+export class AuthSession {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the AuthSession.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column('varchar', {
+		length: 128
+	})
+	public token: string;
+
+	@Column({
+		...id(),
+		nullable: true
+	})
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE',
+		nullable: true
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Column(id())
+	public appId: App['id'];
+
+	@ManyToOne(type => App, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public app: App | null;
+}

packages/backend/src/models/entities/blocking.ts

@@ -0,0 +1,42 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+@Index(['blockerId', 'blockeeId'], { unique: true })
+export class Blocking {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the Blocking.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The blockee user ID.'
+	})
+	public blockeeId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public blockee: User | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The blocker user ID.'
+	})
+	public blockerId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public blocker: User | null;
+}

packages/backend/src/models/entities/channel-following.ts

@@ -0,0 +1,43 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+import { Channel } from './channel';
+
+@Entity()
+@Index(['followerId', 'followeeId'], { unique: true })
+export class ChannelFollowing {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the ChannelFollowing.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The followee channel ID.'
+	})
+	public followeeId: Channel['id'];
+
+	@ManyToOne(type => Channel, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public followee: Channel | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The follower user ID.'
+	})
+	public followerId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public follower: User | null;
+}

packages/backend/src/models/entities/channel-note-pining.ts

@@ -0,0 +1,35 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { Note } from './note';
+import { Channel } from './channel';
+import { id } from '../id';
+
+@Entity()
+@Index(['channelId', 'noteId'], { unique: true })
+export class ChannelNotePining {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the ChannelNotePining.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column(id())
+	public channelId: Channel['id'];
+
+	@ManyToOne(type => Channel, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public channel: Channel | null;
+
+	@Column(id())
+	public noteId: Note['id'];
+
+	@ManyToOne(type => Note, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public note: Note | null;
+}

packages/backend/src/models/entities/channel.ts

@@ -0,0 +1,75 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+import { DriveFile } from './drive-file';
+
+@Entity()
+export class Channel {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the Channel.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		nullable: true
+	})
+	public lastNotedAt: Date | null;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The owner ID.'
+	})
+	public userId: User['id'] | null;
+
+	@ManyToOne(type => User, {
+		onDelete: 'SET NULL'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Column('varchar', {
+		length: 128,
+		comment: 'The name of the Channel.'
+	})
+	public name: string;
+
+	@Column('varchar', {
+		length: 2048, nullable: true,
+		comment: 'The description of the Channel.'
+	})
+	public description: string | null;
+
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The ID of banner Channel.'
+	})
+	public bannerId: DriveFile['id'] | null;
+
+	@ManyToOne(type => DriveFile, {
+		onDelete: 'SET NULL'
+	})
+	@JoinColumn()
+	public banner: DriveFile | null;
+
+	@Index()
+	@Column('integer', {
+		default: 0,
+		comment: 'The count of notes.'
+	})
+	public notesCount: number;
+
+	@Index()
+	@Column('integer', {
+		default: 0,
+		comment: 'The count of users.'
+	})
+	public usersCount: number;
+}

packages/backend/src/models/entities/clip-note.ts

@@ -0,0 +1,37 @@
+import { Entity, Index, JoinColumn, Column, ManyToOne, PrimaryColumn } from 'typeorm';
+import { Note } from './note';
+import { Clip } from './clip';
+import { id } from '../id';
+
+@Entity()
+@Index(['noteId', 'clipId'], { unique: true })
+export class ClipNote {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The note ID.'
+	})
+	public noteId: Note['id'];
+
+	@ManyToOne(type => Note, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public note: Note | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The clip ID.'
+	})
+	public clipId: Clip['id'];
+
+	@ManyToOne(type => Clip, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public clip: Clip | null;
+}

packages/backend/src/models/entities/clip.ts

@@ -0,0 +1,44 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+export class Clip {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the Clip.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The owner ID.'
+	})
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Column('varchar', {
+		length: 128,
+		comment: 'The name of the Clip.'
+	})
+	public name: string;
+
+	@Column('boolean', {
+		default: false
+	})
+	public isPublic: boolean;
+
+	@Column('varchar', {
+		length: 2048, nullable: true, default: null,
+		comment: 'The description of the Clip.'
+	})
+	public description: string | null;
+}

packages/backend/src/models/entities/drive-file.ts

@@ -0,0 +1,164 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { DriveFolder } from './drive-folder';
+import { id } from '../id';
+
+@Entity()
+@Index(['userId', 'folderId', 'id'])
+export class DriveFile {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the DriveFile.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The owner ID.'
+	})
+	public userId: User['id'] | null;
+
+	@ManyToOne(type => User, {
+		onDelete: 'SET NULL'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: 'The host of owner. It will be null if the user in local.'
+	})
+	public userHost: string | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 32,
+		comment: 'The MD5 hash of the DriveFile.'
+	})
+	public md5: string;
+
+	@Column('varchar', {
+		length: 256,
+		comment: 'The file name of the DriveFile.'
+	})
+	public name: string;
+
+	@Index()
+	@Column('varchar', {
+		length: 128,
+		comment: 'The content type (MIME) of the DriveFile.'
+	})
+	public type: string;
+
+	@Column('integer', {
+		comment: 'The file size (bytes) of the DriveFile.'
+	})
+	public size: number;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: 'The comment of the DriveFile.'
+	})
+	public comment: string | null;
+
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: 'The BlurHash string.'
+	})
+	public blurhash: string | null;
+
+	@Column('jsonb', {
+		default: {},
+		comment: 'The any properties of the DriveFile. For example, it includes image width/height.'
+	})
+	public properties: { width?: number; height?: number; avgColor?: string };
+
+	@Index()
+	@Column('boolean')
+	public storedInternal: boolean;
+
+	@Column('varchar', {
+		length: 512,
+		comment: 'The URL of the DriveFile.'
+	})
+	public url: string;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: 'The URL of the thumbnail of the DriveFile.'
+	})
+	public thumbnailUrl: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: 'The URL of the webpublic of the DriveFile.'
+	})
+	public webpublicUrl: string | null;
+
+	@Index({ unique: true })
+	@Column('varchar', {
+		length: 256, nullable: true,
+	})
+	public accessKey: string | null;
+
+	@Index({ unique: true })
+	@Column('varchar', {
+		length: 256, nullable: true,
+	})
+	public thumbnailAccessKey: string | null;
+
+	@Index({ unique: true })
+	@Column('varchar', {
+		length: 256, nullable: true,
+	})
+	public webpublicAccessKey: string | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: 'The URI of the DriveFile. it will be null when the DriveFile is local.'
+	})
+	public uri: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+	})
+	public src: string | null;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The parent folder ID. If null, it means the DriveFile is located in root.'
+	})
+	public folderId: DriveFolder['id'] | null;
+
+	@ManyToOne(type => DriveFolder, {
+		onDelete: 'SET NULL'
+	})
+	@JoinColumn()
+	public folder: DriveFolder | null;
+
+	@Index()
+	@Column('boolean', {
+		default: false,
+		comment: 'Whether the DriveFile is NSFW.'
+	})
+	public isSensitive: boolean;
+
+	/**
+	 * 外部の(信頼されていない)URLへの直リンクか否か
+	 */
+	@Index()
+	@Column('boolean', {
+		default: false,
+		comment: 'Whether the DriveFile is direct link to remote server.'
+	})
+	public isLink: boolean;
+}

packages/backend/src/models/entities/drive-folder.ts

@@ -0,0 +1,49 @@
+import { JoinColumn, ManyToOne, Entity, PrimaryColumn, Index, Column } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+export class DriveFolder {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the DriveFolder.'
+	})
+	public createdAt: Date;
+
+	@Column('varchar', {
+		length: 128,
+		comment: 'The name of the DriveFolder.'
+	})
+	public name: string;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The owner ID.'
+	})
+	public userId: User['id'] | null;
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The parent folder ID. If null, it means the DriveFolder is located in root.'
+	})
+	public parentId: DriveFolder['id'] | null;
+
+	@ManyToOne(type => DriveFolder, {
+		onDelete: 'SET NULL'
+	})
+	@JoinColumn()
+	public parent: DriveFolder | null;
+}

packages/backend/src/models/entities/emoji.ts

@@ -0,0 +1,51 @@
+import { PrimaryColumn, Entity, Index, Column } from 'typeorm';
+import { id } from '../id';
+
+@Entity()
+@Index(['name', 'host'], { unique: true })
+export class Emoji {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		nullable: true
+	})
+	public updatedAt: Date | null;
+
+	@Index()
+	@Column('varchar', {
+		length: 128
+	})
+	public name: string;
+
+	@Index()
+	@Column('varchar', {
+		length: 128, nullable: true
+	})
+	public host: string | null;
+
+	@Column('varchar', {
+		length: 128, nullable: true
+	})
+	public category: string | null;
+
+	@Column('varchar', {
+		length: 512,
+	})
+	public url: string;
+
+	@Column('varchar', {
+		length: 512, nullable: true
+	})
+	public uri: string | null;
+
+	@Column('varchar', {
+		length: 64, nullable: true
+	})
+	public type: string | null;
+
+	@Column('varchar', {
+		array: true, length: 128, default: '{}'
+	})
+	public aliases: string[];
+}

packages/backend/src/models/entities/follow-request.ts

@@ -0,0 +1,85 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+@Index(['followerId', 'followeeId'], { unique: true })
+export class FollowRequest {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the FollowRequest.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The followee user ID.'
+	})
+	public followeeId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public followee: User | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The follower user ID.'
+	})
+	public followerId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public follower: User | null;
+
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: 'id of Follow Activity.'
+	})
+	public requestId: string | null;
+
+	//#region Denormalized fields
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followerHost: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followerInbox: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followerSharedInbox: string | null;
+
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followeeHost: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followeeInbox: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followeeSharedInbox: string | null;
+	//#endregion
+}

packages/backend/src/models/entities/following.ts

@@ -0,0 +1,80 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+@Index(['followerId', 'followeeId'], { unique: true })
+export class Following {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the Following.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The followee user ID.'
+	})
+	public followeeId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public followee: User | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The follower user ID.'
+	})
+	public followerId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public follower: User | null;
+
+	//#region Denormalized fields
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followerHost: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followerInbox: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followerSharedInbox: string | null;
+
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followeeHost: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followeeInbox: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+		comment: '[Denormalized]'
+	})
+	public followeeSharedInbox: string | null;
+	//#endregion
+}

packages/backend/src/models/entities/gallery-like.ts

@@ -0,0 +1,33 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+import { GalleryPost } from './gallery-post';
+
+@Entity()
+@Index(['userId', 'postId'], { unique: true })
+export class GalleryLike {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Column('timestamp with time zone')
+	public createdAt: Date;
+
+	@Index()
+	@Column(id())
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Column(id())
+	public postId: GalleryPost['id'];
+
+	@ManyToOne(type => GalleryPost, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public post: GalleryPost | null;
+}

packages/backend/src/models/entities/gallery-post.ts

@@ -0,0 +1,79 @@
+import { Entity, Index, JoinColumn, Column, PrimaryColumn, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+import { DriveFile } from './drive-file';
+
+@Entity()
+export class GalleryPost {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the GalleryPost.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The updated date of the GalleryPost.'
+	})
+	public updatedAt: Date;
+
+	@Column('varchar', {
+		length: 256,
+	})
+	public title: string;
+
+	@Column('varchar', {
+		length: 2048, nullable: true
+	})
+	public description: string | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The ID of author.'
+	})
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Index()
+	@Column({
+		...id(),
+		array: true, default: '{}'
+	})
+	public fileIds: DriveFile['id'][];
+
+	@Index()
+	@Column('boolean', {
+		default: false,
+		comment: 'Whether the post is sensitive.'
+	})
+	public isSensitive: boolean;
+
+	@Index()
+	@Column('integer', {
+		default: 0
+	})
+	public likedCount: number;
+
+	@Index()
+	@Column('varchar', {
+		length: 128, array: true, default: '{}'
+	})
+	public tags: string[];
+
+	constructor(data: Partial<GalleryPost>) {
+		if (data == null) return;
+
+		for (const [k, v] of Object.entries(data)) {
+			(this as any)[k] = v;
+		}
+	}
+}

packages/backend/src/models/entities/games/reversi/game.ts

@@ -0,0 +1,133 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from '../../user';
+import { id } from '../../../id';
+
+@Entity()
+export class ReversiGame {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the ReversiGame.'
+	})
+	public createdAt: Date;
+
+	@Column('timestamp with time zone', {
+		nullable: true,
+		comment: 'The started date of the ReversiGame.'
+	})
+	public startedAt: Date | null;
+
+	@Column(id())
+	public user1Id: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user1: User | null;
+
+	@Column(id())
+	public user2Id: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user2: User | null;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public user1Accepted: boolean;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public user2Accepted: boolean;
+
+	/**
+	 * どちらのプレイヤーが先行(黒)か
+	 * 1 ... user1
+	 * 2 ... user2
+	 */
+	@Column('integer', {
+		nullable: true,
+	})
+	public black: number | null;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public isStarted: boolean;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public isEnded: boolean;
+
+	@Column({
+		...id(),
+		nullable: true
+	})
+	public winnerId: User['id'] | null;
+
+	@Column({
+		...id(),
+		nullable: true
+	})
+	public surrendered: User['id'] | null;
+
+	@Column('jsonb', {
+		default: [],
+	})
+	public logs: {
+		at: Date;
+		color: boolean;
+		pos: number;
+	}[];
+
+	@Column('varchar', {
+		array: true, length: 64,
+	})
+	public map: string[];
+
+	@Column('varchar', {
+		length: 32
+	})
+	public bw: string;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public isLlotheo: boolean;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public canPutEverywhere: boolean;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public loopedBoard: boolean;
+
+	@Column('jsonb', {
+		nullable: true, default: null,
+	})
+	public form1: any | null;
+
+	@Column('jsonb', {
+		nullable: true, default: null,
+	})
+	public form2: any | null;
+
+	/**
+	 * ログのposを文字列としてすべて連結したもののCRC32値
+	 */
+	@Column('varchar', {
+		length: 32, nullable: true
+	})
+	public crc32: string | null;
+}

packages/backend/src/models/entities/games/reversi/matching.ts

@@ -0,0 +1,35 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from '../../user';
+import { id } from '../../../id';
+
+@Entity()
+export class ReversiMatching {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the ReversiMatching.'
+	})
+	public createdAt: Date;
+
+	@Index()
+	@Column(id())
+	public parentId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public parent: User | null;
+
+	@Index()
+	@Column(id())
+	public childId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public child: User | null;
+}

packages/backend/src/models/entities/hashtag.ts

@@ -0,0 +1,87 @@
+import { Entity, PrimaryColumn, Index, Column } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+export class Hashtag {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index({ unique: true })
+	@Column('varchar', {
+		length: 128
+	})
+	public name: string;
+
+	@Column({
+		...id(),
+		array: true,
+	})
+	public mentionedUserIds: User['id'][];
+
+	@Index()
+	@Column('integer', {
+		default: 0
+	})
+	public mentionedUsersCount: number;
+
+	@Column({
+		...id(),
+		array: true,
+	})
+	public mentionedLocalUserIds: User['id'][];
+
+	@Index()
+	@Column('integer', {
+		default: 0
+	})
+	public mentionedLocalUsersCount: number;
+
+	@Column({
+		...id(),
+		array: true,
+	})
+	public mentionedRemoteUserIds: User['id'][];
+
+	@Index()
+	@Column('integer', {
+		default: 0
+	})
+	public mentionedRemoteUsersCount: number;
+
+	@Column({
+		...id(),
+		array: true,
+	})
+	public attachedUserIds: User['id'][];
+
+	@Index()
+	@Column('integer', {
+		default: 0
+	})
+	public attachedUsersCount: number;
+
+	@Column({
+		...id(),
+		array: true,
+	})
+	public attachedLocalUserIds: User['id'][];
+
+	@Index()
+	@Column('integer', {
+		default: 0
+	})
+	public attachedLocalUsersCount: number;
+
+	@Column({
+		...id(),
+		array: true,
+	})
+	public attachedRemoteUserIds: User['id'][];
+
+	@Index()
+	@Column('integer', {
+		default: 0
+	})
+	public attachedRemoteUsersCount: number;
+}