feat(backend): 7日間運営のアクティビティがないサーバを自動的に招待制にする

packages/backend/src/core/QueueService.ts

@@ -93,6 +93,13 @@ export class QueueService {
 			repeat: { pattern: '0 0 * * *' },
 			removeOnComplete: true,
 		});
+
+		this.systemQueue.add('checkModeratorsActivity', {
+		}, {
+			// 毎時30分に起動
+			repeat: { pattern: '30 * * * *' },
+			removeOnComplete: true,
+		});
 	}
 
 	@bindThis

packages/backend/src/core/RoleService.ts

@@ -101,6 +101,7 @@ export const DEFAULT_POLICIES: RolePolicies = {
 
 @Injectable()
 export class RoleService implements OnApplicationShutdown, OnModuleInit {
+	private rootUserIdCache: MemorySingleCache<MiUser['id']>;
 	private rolesCache: MemorySingleCache<MiRole[]>;
 	private roleAssignmentByUserIdCache: MemoryKVCache<MiRoleAssignment[]>;
 	private notificationService: NotificationService;
@@ -136,6 +137,7 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 		private moderationLogService: ModerationLogService,
 		private fanoutTimelineService: FanoutTimelineService,
 	) {
+		this.rootUserIdCache = new MemorySingleCache<MiUser['id']>(1000 * 60 * 60 * 24 * 7); // 1week. rootユーザのIDは不変なので長めに
 		this.rolesCache = new MemorySingleCache<MiRole[]>(1000 * 60 * 60); // 1h
 		this.roleAssignmentByUserIdCache = new MemoryKVCache<MiRoleAssignment[]>(1000 * 60 * 5); // 5m
 
@@ -416,7 +418,7 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 	}
 
 	@bindThis
-	public async isExplorable(role: { id: MiRole['id']} | null): Promise<boolean> {
+	public async isExplorable(role: { id: MiRole['id'] } | null): Promise<boolean> {
 		if (role == null) return false;
 		const check = await this.rolesRepository.findOneBy({ id: role.id });
 		if (check == null) return false;
@@ -430,22 +432,32 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 			? roles.filter(r => r.isModerator || r.isAdministrator)
 			: roles.filter(r => r.isModerator);
 
-		// TODO: isRootなアカウントも含める
 		const assigns = moderatorRoles.length > 0
 			? await this.roleAssignmentsRepository.findBy({ roleId: In(moderatorRoles.map(r => r.id)) })
 			: [];
 
+		const rootUserId = await this.rootUserIdCache.fetch(async () => {
+			const it = await this.usersRepository.createQueryBuilder('users')
+				.select('id')
+				.where({ isRoot: true })
+				.getOneOrFail();
+			return it.id;
+		});
+
 		const now = Date.now();
 		const result = [
 			// Setを経由して重複を除去（ユーザIDは重複する可能性があるので）
 			...new Set(
-				assigns
+				[
+					...assigns
 						.filter(it =>
 							(excludeExpire)
 								? (it.expiresAt == null || it.expiresAt.getTime() > now)
 								: true,
 						)
 						.map(a => a.userId),
+					rootUserId,
+				],
 			),
 		];
 
@@ -453,12 +465,13 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 	}
 
 	@bindThis
-	public async getModerators(includeAdmins = true): Promise<MiUser[]> {
-		const ids = await this.getModeratorIds(includeAdmins);
-		const users = ids.length > 0 ? await this.usersRepository.findBy({
+	public async getModerators(includeAdmins = true, excludeExpire = false): Promise<MiUser[]> {
+		const ids = await this.getModeratorIds(includeAdmins, excludeExpire);
+		return ids.length > 0
+			? await this.usersRepository.findBy({
 				id: In(ids),
-		}) : [];
-		return users;
+			})
+			: [];
 	}
 
 	@bindThis

packages/backend/src/queue/QueueProcessorModule.ts

@@ -80,6 +80,7 @@ import { RelationshipProcessorService } from './processors/RelationshipProcessor
 		DeliverProcessorService,
 		InboxProcessorService,
 		AggregateRetentionProcessorService,
+		CheckExpiredMutingsProcessorService,
 		QueueProcessorService,
 	],
 	exports: [

packages/backend/src/queue/QueueProcessorService.ts

@@ -10,6 +10,7 @@ import type { Config } from '@/config.js';
 import { DI } from '@/di-symbols.js';
 import type Logger from '@/logger.js';
 import { bindThis } from '@/decorators.js';
+import { CheckModeratorsActivityProcessorService } from '@/queue/processors/CheckModeratorsActivityProcessorService.js';
 import { UserWebhookDeliverProcessorService } from './processors/UserWebhookDeliverProcessorService.js';
 import { SystemWebhookDeliverProcessorService } from './processors/SystemWebhookDeliverProcessorService.js';
 import { EndedPollNotificationProcessorService } from './processors/EndedPollNotificationProcessorService.js';
@@ -120,6 +121,7 @@ export class QueueProcessorService implements OnApplicationShutdown {
 		private aggregateRetentionProcessorService: AggregateRetentionProcessorService,
 		private checkExpiredMutingsProcessorService: CheckExpiredMutingsProcessorService,
 		private bakeBufferedReactionsProcessorService: BakeBufferedReactionsProcessorService,
+		private checkModeratorsActivityProcessorService: CheckModeratorsActivityProcessorService,
 		private cleanProcessorService: CleanProcessorService,
 	) {
 		this.logger = this.queueLoggerService.logger;
@@ -150,6 +152,7 @@ export class QueueProcessorService implements OnApplicationShutdown {
 					case 'aggregateRetention': return this.aggregateRetentionProcessorService.process();
 					case 'checkExpiredMutings': return this.checkExpiredMutingsProcessorService.process();
 					case 'bakeBufferedReactions': return this.bakeBufferedReactionsProcessorService.process();
+					case 'checkModeratorsActivity': return this.checkModeratorsActivityProcessorService.process();
 					case 'clean': return this.cleanProcessorService.process();
 					default: throw new Error(`unrecognized job type ${job.name} for system`);
 				}

packages/backend/src/queue/processors/CheckModeratorsActivityProcessorService.ts

@@ -0,0 +1,110 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import type Logger from '@/logger.js';
+import { bindThis } from '@/decorators.js';
+import { MetaService } from '@/core/MetaService.js';
+import { RoleService } from '@/core/RoleService.js';
+import { QueueLoggerService } from '../QueueLoggerService.js';
+
+// モデレーターが不在と判断する日付の閾値
+const MODERATOR_INACTIVITY_LIMIT_DAYS = 7;
+const ONE_DAY_MILLI_SEC = 1000 * 60 * 60 * 24;
+
+@Injectable()
+export class CheckModeratorsActivityProcessorService {
+	private logger: Logger;
+
+	constructor(
+		private metaService: MetaService,
+		private roleService: RoleService,
+		private queueLoggerService: QueueLoggerService,
+	) {
+		this.logger = this.queueLoggerService.logger.createSubLogger('check-moderators-activity');
+	}
+
+	@bindThis
+	public async process(): Promise<void> {
+		this.logger.info('start.');
+
+		const meta = await this.metaService.fetch(false);
+		if (!meta.disableRegistration) {
+			await this.processImpl();
+		} else {
+			this.logger.warn('is already invitation only.');
+		}
+
+		this.logger.succ('finish.');
+	}
+
+	@bindThis
+	private async processImpl() {
+		const { isModeratorsInactive, inactivityLimitCountdown } = await this.evaluateModeratorsInactiveDays();
+		if (isModeratorsInactive) {
+			this.logger.warn(`The moderator has been inactive for ${MODERATOR_INACTIVITY_LIMIT_DAYS} days. We will move to invitation only.`);
+			await this.changeToInvitationOnly();
+		} else {
+			if (inactivityLimitCountdown <= 2) {
+				this.logger.info(`A moderator has been inactive for a period of time. If you are inactive for an additional ${inactivityLimitCountdown} days, it will switch to invitation only.`);
+			}
+		}
+	}
+
+	/**
+	 * モデレーターが不在であるかどうかを確認する。trueの場合はモデレーターが不在である。
+	 * isModerator, isAdministrator, isRootのいずれかがtrueのユーザを対象に、
+	 * {@link MiUser.lastActiveDate}の値が実行日時の{@link MODERATOR_INACTIVITY_LIMIT_DAYS}日前よりも古いユーザがいるかどうかを確認する。
+	 * {@link MiUser.lastActiveDate}がnullの場合は、そのユーザは確認の対象外とする。
+	 *
+	 * -----
+	 *
+	 * ### サンプルパターン
+	 * - 実行日時: 2022-01-30 12:00:00
+	 * - 判定基準: 2022-01-23 12:00:00（実行日時の{@link MODERATOR_INACTIVITY_LIMIT_DAYS}日前）
+	 *
+	 * #### パターン①
+	 * - モデレータA: lastActiveDate = 2022-01-20 00:00:00 ※アウト
+	 * - モデレータB: lastActiveDate = 2022-01-23 12:00:00 ※セーフ（ギリギリ残り0日）
+	 * - モデレータC: lastActiveDate = 2022-01-23 11:59:59 ※アウト（残り-1日）
+	 * - モデレータD: lastActiveDate = null
+	 *
+	 * この場合、モデレータBのアクティビティのみ判定基準日よりも古くないため、モデレーターが在席と判断される。
+	 *
+	 * #### パターン②
+	 * - モデレータA: lastActiveDate = 2022-01-20 00:00:00 ※アウト
+	 * - モデレータB: lastActiveDate = 2022-01-22 12:00:00 ※アウト（残り-1日）
+	 * - モデレータC: lastActiveDate = 2022-01-23 11:59:59 ※アウト（残り-1日）
+	 * - モデレータC: lastActiveDate = null
+	 *
+	 * この場合、モデレータA, B, Cのアクティビティは判定基準日よりも古いため、モデレーターが不在と判断される。
+	 */
+	@bindThis
+	public async evaluateModeratorsInactiveDays() {
+		const today = new Date();
+		const inactivePeriod = new Date(today);
+		inactivePeriod.setDate(today.getDate() - MODERATOR_INACTIVITY_LIMIT_DAYS);
+
+		// TODO: モデレーター以外にも特別な権限を持つユーザーがいる場合は考慮する
+		const moderators = await this.roleService.getModerators(true, true);
+		const inactiveModeratorCount = moderators
+			.map(it => it.lastActiveDate)
+			.filter(it => it != null)
+			.filter(it => it.getTime() < inactivePeriod.getTime())
+			.length;
+
+		return {
+			isModeratorsInactive: inactiveModeratorCount !== moderators.length,
+			inactivityLimitCountdown: MODERATOR_INACTIVITY_LIMIT_DAYS - Math.floor((today.getTime() - inactivePeriod.getTime()) / ONE_DAY_MILLI_SEC),
+		};
+	}
+
+	@bindThis
+	public async changeToInvitationOnly() {
+		const meta = await this.metaService.fetch(true);
+		meta.disableRegistration = true;
+		await this.metaService.update(meta);
+	}
+}