feat: 運営のアクティビティが一定期間ない場合は通知＋招待制に移行した際に通知 (#14757)

* feat: 運営のアクティビティが一定期間ない場合は通知＋招待制に移行した際に通知

* fix misskey-js.api.md

* Revert "feat: 運営のアクティビティが一定期間ない場合は通知＋招待制に移行した際に通知"

This reverts commit 3ab953bdf87f28411a1a10bce787a23d238cda80.

* 通知をやめてユーザ単位でのお知らせ機能に変更

* テスト用実装を戻す

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

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

* fix remove empty then

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/backend/src/core/WebhookTestService.ts

@@ -12,6 +12,7 @@ import { Packed } from '@/misc/json-schema.js';
 import { type WebhookEventTypes } from '@/models/Webhook.js';
 import { UserWebhookService } from '@/core/UserWebhookService.js';
 import { QueueService } from '@/core/QueueService.js';
+import { ModeratorInactivityRemainingTime } from '@/queue/processors/CheckModeratorsActivityProcessorService.js';
 
 const oneDayMillis = 24 * 60 * 60 * 1000;
 
@@ -449,6 +450,22 @@ export class WebhookTestService {
 				send(toPackedUserLite(dummyUser1));
 				break;
 			}
+			case 'inactiveModeratorsWarning': {
+				const dummyTime: ModeratorInactivityRemainingTime = {
+					time: 100000,
+					asDays: 1,
+					asHours: 24,
+				};
+
+				send({
+					remainingTime: dummyTime,
+				});
+				break;
+			}
+			case 'inactiveModeratorsInvitationOnlyChanged': {
+				send({});
+				break;
+			}
 		}
 	}
 }

packages/backend/src/models/SystemWebhook.ts

@@ -14,6 +14,10 @@ export const systemWebhookEventTypes = [
 	'abuseReportResolved',
 	// ユーザが作成された時
 	'userCreated',
+	// モデレータが一定期間不在である警告
+	'inactiveModeratorsWarning',
+	// モデレータが一定期間不在のためシステムにより招待制へと変更された
+	'inactiveModeratorsInvitationOnlyChanged',
 ] as const;
 export type SystemWebhookEventType = typeof systemWebhookEventTypes[number];
 

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

@@ -3,24 +3,110 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
+import { In } from 'typeorm';
 import type Logger from '@/logger.js';
 import { bindThis } from '@/decorators.js';
 import { MetaService } from '@/core/MetaService.js';
 import { RoleService } from '@/core/RoleService.js';
+import { EmailService } from '@/core/EmailService.js';
+import { MiUser, type UserProfilesRepository } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
+import { SystemWebhookService } from '@/core/SystemWebhookService.js';
+import { AnnouncementService } from '@/core/AnnouncementService.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;
+// 警告通知やログ出力を行う残日数の閾値
+const MODERATOR_INACTIVITY_WARNING_REMAINING_DAYS = 2;
+// 期限から6時間ごとに通知を行う
+const MODERATOR_INACTIVITY_WARNING_NOTIFY_INTERVAL_HOURS = 6;
+const ONE_HOUR_MILLI_SEC = 1000 * 60 * 60;
+const ONE_DAY_MILLI_SEC = ONE_HOUR_MILLI_SEC * 24;
+
+export type ModeratorInactivityEvaluationResult = {
+	isModeratorsInactive: boolean;
+	inactiveModerators: MiUser[];
+	remainingTime: ModeratorInactivityRemainingTime;
+}
+
+export type ModeratorInactivityRemainingTime = {
+	time: number;
+	asHours: number;
+	asDays: number;
+};
+
+function generateModeratorInactivityMail(remainingTime: ModeratorInactivityRemainingTime) {
+	const subject = 'Moderator Inactivity Warning / モデレーター不在の通知';
+
+	const timeVariant = remainingTime.asDays === 0 ? `${remainingTime.asHours} hours` : `${remainingTime.asDays} days`;
+	const timeVariantJa = remainingTime.asDays === 0 ? `${remainingTime.asHours} 時間` : `${remainingTime.asDays} 日間`;
+	const message = [
+		'To Moderators,',
+		'',
+		`A moderator has been inactive for a period of time. If there are ${timeVariant} of inactivity left, it will switch to invitation only.`,
+		'If you do not wish to move to invitation only, you must log into Misskey and update your last active date and time.',
+		'',
+		'---------------',
+		'',
+		'To モデレーター各位',
+		'',
+		`モデレーターが一定期間活動していないようです。あと${timeVariantJa}活動していない状態が続くと招待制に切り替わります。`,
+		'招待制に切り替わることを望まない場合は、Misskeyにログインして最終アクティブ日時を更新してください。',
+		'',
+	];
+
+	const html = message.join('<br>');
+	const text = message.join('\n');
+
+	return {
+		subject,
+		html,
+		text,
+	};
+}
+
+function generateInvitationOnlyChangedMail() {
+	const subject = 'Change to Invitation-Only / 招待制に変更されました';
+
+	const message = [
+		'To Moderators,',
+		'',
+		`Changed to invitation only because no moderator activity was detected for ${MODERATOR_INACTIVITY_LIMIT_DAYS} days.`,
+		'To cancel the invitation only, you need to access the control panel.',
+		'',
+		'---------------',
+		'',
+		'To モデレーター各位',
+		'',
+		`モデレーターの活動が${MODERATOR_INACTIVITY_LIMIT_DAYS}日間検出されなかったため、招待制に変更されました。`,
+		'招待制を解除するには、コントロールパネルにアクセスする必要があります。',
+		'',
+	];
+
+	const html = message.join('<br>');
+	const text = message.join('\n');
+
+	return {
+		subject,
+		html,
+		text,
+	};
+}
 
 @Injectable()
 export class CheckModeratorsActivityProcessorService {
 	private logger: Logger;
 
 	constructor(
+		@Inject(DI.userProfilesRepository)
+		private userProfilesRepository: UserProfilesRepository,
 		private metaService: MetaService,
 		private roleService: RoleService,
+		private emailService: EmailService,
+		private announcementService: AnnouncementService,
+		private systemWebhookService: SystemWebhookService,
 		private queueLoggerService: QueueLoggerService,
 	) {
 		this.logger = this.queueLoggerService.logger.createSubLogger('check-moderators-activity');
@@ -42,18 +128,23 @@ export class CheckModeratorsActivityProcessorService {
 
 	@bindThis
 	private async processImpl() {
-		const { isModeratorsInactive, inactivityLimitCountdown } = await this.evaluateModeratorsInactiveDays();
+		const evaluateResult = await this.evaluateModeratorsInactiveDays();
-		if (isModeratorsInactive) {
+		if (evaluateResult.isModeratorsInactive) {
 			this.logger.warn(`The moderator has been inactive for ${MODERATOR_INACTIVITY_LIMIT_DAYS} days. We will move to invitation only.`);
+
 			await this.changeToInvitationOnly();
-
+			await this.notifyChangeToInvitationOnly();
-			// TODO: モデレータに通知メール＋Misskey通知
-			// TODO: SystemWebhook通知
 		} else {
-			if (inactivityLimitCountdown <= 2) {
+			const remainingTime = evaluateResult.remainingTime;
-				this.logger.warn(`A moderator has been inactive for a period of time. If you are inactive for an additional ${inactivityLimitCountdown} days, it will switch to invitation only.`);
+			if (remainingTime.asDays <= MODERATOR_INACTIVITY_WARNING_REMAINING_DAYS) {
+				const timeVariant = remainingTime.asDays === 0 ? `${remainingTime.asHours} hours` : `${remainingTime.asDays} days`;
+				this.logger.warn(`A moderator has been inactive for a period of time. If you are inactive for an additional ${timeVariant}, it will switch to invitation only.`);
 
-				// TODO: 警告メール
+				if (remainingTime.asHours % MODERATOR_INACTIVITY_WARNING_NOTIFY_INTERVAL_HOURS === 0) {
+					// ジョブの実行頻度と同等だと通知が多すぎるため期限から6時間ごとに通知する
+					// つまり、のこり2日を切ったら6時間ごとに通知が送られる
+					await this.notifyInactiveModeratorsWarning(remainingTime);
+				}
 			}
 		}
 	}
@@ -87,7 +178,7 @@ export class CheckModeratorsActivityProcessorService {
 	 * 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() {
+	public async evaluateModeratorsInactiveDays(): Promise<ModeratorInactivityEvaluationResult> {
 		const today = new Date();
 		const inactivePeriod = new Date(today);
 		inactivePeriod.setDate(today.getDate() - MODERATOR_INACTIVITY_LIMIT_DAYS);
@@ -101,12 +192,18 @@ export class CheckModeratorsActivityProcessorService {
 		// 残りの猶予を示したいので、最終アクティブ日時が一番若いモデレータの日数を基準に猶予を計算する
 		// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 		const newestLastActiveDate = new Date(Math.max(...moderators.map(it => it.lastActiveDate!.getTime())));
-		const inactivityLimitCountdown = Math.floor((newestLastActiveDate.getTime() - inactivePeriod.getTime()) / ONE_DAY_MILLI_SEC);
+		const remainingTime = newestLastActiveDate.getTime() - inactivePeriod.getTime();
+		const remainingTimeAsDays = Math.floor(remainingTime / ONE_DAY_MILLI_SEC);
+		const remainingTimeAsHours = Math.floor((remainingTime / ONE_HOUR_MILLI_SEC));
 
 		return {
 			isModeratorsInactive: inactiveModerators.length === moderators.length,
 			inactiveModerators,
-			inactivityLimitCountdown,
+			remainingTime: {
+				time: remainingTime,
+				asHours: remainingTimeAsHours,
+				asDays: remainingTimeAsDays,
+			},
 		};
 	}
 
@@ -115,6 +212,74 @@ export class CheckModeratorsActivityProcessorService {
 		await this.metaService.update({ disableRegistration: true });
 	}
 
+	@bindThis
+	public async notifyInactiveModeratorsWarning(remainingTime: ModeratorInactivityRemainingTime) {
+		// -- モデレータへのメール送信
+
+		const moderators = await this.fetchModerators();
+		const moderatorProfiles = await this.userProfilesRepository
+			.findBy({ userId: In(moderators.map(it => it.id)) })
+			.then(it => new Map(it.map(it => [it.userId, it])));
+
+		const mail = generateModeratorInactivityMail(remainingTime);
+		for (const moderator of moderators) {
+			const profile = moderatorProfiles.get(moderator.id);
+			if (profile && profile.email && profile.emailVerified) {
+				this.emailService.sendEmail(profile.email, mail.subject, mail.html, mail.text);
+			}
+		}
+
+		// -- SystemWebhook
+
+		const systemWebhooks = await this.systemWebhookService.fetchActiveSystemWebhooks()
+			.then(it => it.filter(it => it.on.includes('inactiveModeratorsWarning')));
+		for (const systemWebhook of systemWebhooks) {
+			this.systemWebhookService.enqueueSystemWebhook(
+				systemWebhook,
+				'inactiveModeratorsWarning',
+				{ remainingTime: remainingTime },
+			);
+		}
+	}
+
+	@bindThis
+	public async notifyChangeToInvitationOnly() {
+		// -- モデレータへのメールとお知らせ（個人向け）送信
+
+		const moderators = await this.fetchModerators();
+		const moderatorProfiles = await this.userProfilesRepository
+			.findBy({ userId: In(moderators.map(it => it.id)) })
+			.then(it => new Map(it.map(it => [it.userId, it])));
+
+		const mail = generateInvitationOnlyChangedMail();
+		for (const moderator of moderators) {
+			this.announcementService.create({
+				title: mail.subject,
+				text: mail.text,
+				forExistingUsers: true,
+				needConfirmationToRead: true,
+				userId: moderator.id,
+			});
+
+			const profile = moderatorProfiles.get(moderator.id);
+			if (profile && profile.email && profile.emailVerified) {
+				this.emailService.sendEmail(profile.email, mail.subject, mail.html, mail.text);
+			}
+		}
+
+		// -- SystemWebhook
+
+		const systemWebhooks = await this.systemWebhookService.fetchActiveSystemWebhooks()
+			.then(it => it.filter(it => it.on.includes('inactiveModeratorsInvitationOnlyChanged')));
+		for (const systemWebhook of systemWebhooks) {
+			this.systemWebhookService.enqueueSystemWebhook(
+				systemWebhook,
+				'inactiveModeratorsInvitationOnlyChanged',
+				{},
+			);
+		}
+	}
+
 	@bindThis
 	private async fetchModerators() {
 		// 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

packages/backend/test/unit/queue/processors/CheckModeratorsActivityProcessorService.ts

@@ -8,13 +8,16 @@ import { Test, TestingModule } from '@nestjs/testing';
 import * as lolex from '@sinonjs/fake-timers';
 import { addHours, addSeconds, subDays, subHours, subSeconds } from 'date-fns';
 import { CheckModeratorsActivityProcessorService } from '@/queue/processors/CheckModeratorsActivityProcessorService.js';
-import { MiUser, UserProfilesRepository, UsersRepository } from '@/models/_.js';
+import { MiSystemWebhook, MiUser, MiUserProfile, UserProfilesRepository, UsersRepository } from '@/models/_.js';
 import { IdService } from '@/core/IdService.js';
 import { RoleService } from '@/core/RoleService.js';
 import { GlobalModule } from '@/GlobalModule.js';
 import { MetaService } from '@/core/MetaService.js';
 import { DI } from '@/di-symbols.js';
 import { QueueLoggerService } from '@/queue/QueueLoggerService.js';
+import { EmailService } from '@/core/EmailService.js';
+import { SystemWebhookService } from '@/core/SystemWebhookService.js';
+import { AnnouncementService } from '@/core/AnnouncementService.js';
 
 const baseDate = new Date(Date.UTC(2000, 11, 15, 12, 0, 0));
 
@@ -29,10 +32,17 @@ describe('CheckModeratorsActivityProcessorService', () => {
 	let userProfilesRepository: UserProfilesRepository;
 	let idService: IdService;
 	let roleService: jest.Mocked<RoleService>;
+	let announcementService: jest.Mocked<AnnouncementService>;
+	let emailService: jest.Mocked<EmailService>;
+	let systemWebhookService: jest.Mocked<SystemWebhookService>;
+
+	let systemWebhook1: MiSystemWebhook;
+	let systemWebhook2: MiSystemWebhook;
+	let systemWebhook3: MiSystemWebhook;
 
 	// --------------------------------------------------------------------------------------
 
-	async function createUser(data: Partial<MiUser> = {}) {
+	async function createUser(data: Partial<MiUser> = {}, profile: Partial<MiUserProfile> = {}): Promise<MiUser> {
 		const id = idService.gen();
 		const user = await usersRepository
 			.insert({
@@ -45,11 +55,27 @@ describe('CheckModeratorsActivityProcessorService', () => {
 
 		await userProfilesRepository.insert({
 			userId: user.id,
+			...profile,
 		});
 
 		return user;
 	}
 
+	function crateSystemWebhook(data: Partial<MiSystemWebhook> = {}): MiSystemWebhook {
+		return {
+			id: idService.gen(),
+			isActive: true,
+			updatedAt: new Date(),
+			latestSentAt: null,
+			latestStatus: null,
+			name: 'test',
+			url: 'https://example.com',
+			secret: 'test',
+			on: [],
+			...data,
+		};
+	}
+
 	function mockModeratorRole(users: MiUser[]) {
 		roleService.getModerators.mockReset();
 		roleService.getModerators.mockResolvedValue(users);
@@ -72,6 +98,18 @@ describe('CheckModeratorsActivityProcessorService', () => {
 					{
 						provide: MetaService, useFactory: () => ({ fetch: jest.fn() }),
 					},
+					{
+						provide: AnnouncementService, useFactory: () => ({ create: jest.fn() }),
+					},
+					{
+						provide: EmailService, useFactory: () => ({ sendEmail: jest.fn() }),
+					},
+					{
+						provide: SystemWebhookService, useFactory: () => ({
+							fetchActiveSystemWebhooks: jest.fn(),
+							enqueueSystemWebhook: jest.fn(),
+						}),
+					},
 					{
 						provide: QueueLoggerService, useFactory: () => ({
 							logger: ({
@@ -93,6 +131,9 @@ describe('CheckModeratorsActivityProcessorService', () => {
 		service = app.get(CheckModeratorsActivityProcessorService);
 		idService = app.get(IdService);
 		roleService = app.get(RoleService) as jest.Mocked<RoleService>;
+		announcementService = app.get(AnnouncementService) as jest.Mocked<AnnouncementService>;
+		emailService = app.get(EmailService) as jest.Mocked<EmailService>;
+		systemWebhookService = app.get(SystemWebhookService) as jest.Mocked<SystemWebhookService>;
 
 		app.enableShutdownHooks();
 	});
@@ -102,6 +143,15 @@ describe('CheckModeratorsActivityProcessorService', () => {
 			now: new Date(baseDate),
 			shouldClearNativeTimers: true,
 		});
+
+		systemWebhook1 = crateSystemWebhook({ on: ['inactiveModeratorsWarning'] });
+		systemWebhook2 = crateSystemWebhook({ on: ['inactiveModeratorsWarning', 'inactiveModeratorsInvitationOnlyChanged'] });
+		systemWebhook3 = crateSystemWebhook({ on: ['abuseReport'] });
+
+		emailService.sendEmail.mockReturnValue(Promise.resolve());
+		announcementService.create.mockReturnValue(Promise.resolve({} as never));
+		systemWebhookService.fetchActiveSystemWebhooks.mockResolvedValue([systemWebhook1, systemWebhook2, systemWebhook3]);
+		systemWebhookService.enqueueSystemWebhook.mockReturnValue(Promise.resolve({} as never));
 	});
 
 	afterEach(async () => {
@@ -109,6 +159,9 @@ describe('CheckModeratorsActivityProcessorService', () => {
 		await usersRepository.delete({});
 		await userProfilesRepository.delete({});
 		roleService.getModerators.mockReset();
+		announcementService.create.mockReset();
+		emailService.sendEmail.mockReset();
+		systemWebhookService.enqueueSystemWebhook.mockReset();
 	});
 
 	afterAll(async () => {
@@ -152,7 +205,7 @@ describe('CheckModeratorsActivityProcessorService', () => {
 			expect(result.inactiveModerators).toEqual([user1]);
 		});
 
-		test('[countdown] 猶予まで24時間ある場合、猶予1日として計算される', async () => {
+		test('[remainingTime] 猶予まで24時間ある場合、猶予1日として計算される', async () => {
 			const [user1, user2] = await Promise.all([
 				createUser({ lastActiveDate: subDays(baseDate, 8) }),
 				// 猶予はこのユーザ基準で計算される想定。
@@ -165,10 +218,11 @@ describe('CheckModeratorsActivityProcessorService', () => {
 			const result = await service.evaluateModeratorsInactiveDays();
 			expect(result.isModeratorsInactive).toBe(false);
 			expect(result.inactiveModerators).toEqual([user1]);
-			expect(result.inactivityLimitCountdown).toBe(1);
+			expect(result.remainingTime.asDays).toBe(1);
+			expect(result.remainingTime.asHours).toBe(24);
 		});
 
-		test('[countdown] 猶予まで25時間ある場合、猶予1日として計算される', async () => {
+		test('[remainingTime] 猶予まで25時間ある場合、猶予1日として計算される', async () => {
 			const [user1, user2] = await Promise.all([
 				createUser({ lastActiveDate: subDays(baseDate, 8) }),
 				// 猶予はこのユーザ基準で計算される想定。
@@ -181,10 +235,11 @@ describe('CheckModeratorsActivityProcessorService', () => {
 			const result = await service.evaluateModeratorsInactiveDays();
 			expect(result.isModeratorsInactive).toBe(false);
 			expect(result.inactiveModerators).toEqual([user1]);
-			expect(result.inactivityLimitCountdown).toBe(1);
+			expect(result.remainingTime.asDays).toBe(1);
+			expect(result.remainingTime.asHours).toBe(25);
 		});
 
-		test('[countdown] 猶予まで23時間ある場合、猶予0日として計算される', async () => {
+		test('[remainingTime] 猶予まで23時間ある場合、猶予0日として計算される', async () => {
 			const [user1, user2] = await Promise.all([
 				createUser({ lastActiveDate: subDays(baseDate, 8) }),
 				// 猶予はこのユーザ基準で計算される想定。
@@ -197,10 +252,11 @@ describe('CheckModeratorsActivityProcessorService', () => {
 			const result = await service.evaluateModeratorsInactiveDays();
 			expect(result.isModeratorsInactive).toBe(false);
 			expect(result.inactiveModerators).toEqual([user1]);
-			expect(result.inactivityLimitCountdown).toBe(0);
+			expect(result.remainingTime.asDays).toBe(0);
+			expect(result.remainingTime.asHours).toBe(23);
 		});
 
-		test('[countdown] 期限ちょうどの場合、猶予0日として計算される', async () => {
+		test('[remainingTime] 期限ちょうどの場合、猶予0日として計算される', async () => {
 			const [user1, user2] = await Promise.all([
 				createUser({ lastActiveDate: subDays(baseDate, 8) }),
 				// 猶予はこのユーザ基準で計算される想定。
@@ -213,10 +269,11 @@ describe('CheckModeratorsActivityProcessorService', () => {
 			const result = await service.evaluateModeratorsInactiveDays();
 			expect(result.isModeratorsInactive).toBe(false);
 			expect(result.inactiveModerators).toEqual([user1]);
-			expect(result.inactivityLimitCountdown).toBe(0);
+			expect(result.remainingTime.asDays).toBe(0);
+			expect(result.remainingTime.asHours).toBe(0);
 		});
 
-		test('[countdown] 期限より1時間超過している場合、猶予-1日として計算される', async () => {
+		test('[remainingTime] 期限より1時間超過している場合、猶予-1日として計算される', async () => {
 			const [user1, user2] = await Promise.all([
 				createUser({ lastActiveDate: subDays(baseDate, 8) }),
 				// 猶予はこのユーザ基準で計算される想定。
@@ -229,7 +286,94 @@ describe('CheckModeratorsActivityProcessorService', () => {
 			const result = await service.evaluateModeratorsInactiveDays();
 			expect(result.isModeratorsInactive).toBe(true);
 			expect(result.inactiveModerators).toEqual([user1, user2]);
-			expect(result.inactivityLimitCountdown).toBe(-1);
+			expect(result.remainingTime.asDays).toBe(-1);
+			expect(result.remainingTime.asHours).toBe(-1);
+		});
+
+		test('[remainingTime] 期限より25時間超過している場合、猶予-2日として計算される', async () => {
+			const [user1, user2] = await Promise.all([
+				createUser({ lastActiveDate: subDays(baseDate, 10) }),
+				// 猶予はこのユーザ基準で計算される想定。
+				// 期限より1時間超過->猶予-1日として計算されるはずである
+				createUser({ lastActiveDate: subDays(subHours(baseDate, 25), 7) }),
+			]);
+
+			mockModeratorRole([user1, user2]);
+
+			const result = await service.evaluateModeratorsInactiveDays();
+			expect(result.isModeratorsInactive).toBe(true);
+			expect(result.inactiveModerators).toEqual([user1, user2]);
+			expect(result.remainingTime.asDays).toBe(-2);
+			expect(result.remainingTime.asHours).toBe(-25);
+		});
+	});
+
+	describe('notifyInactiveModeratorsWarning', () => {
+		test('[notification + mail] 通知はモデレータ全員に発信され、メールはメールアドレスが存在＋認証済みの場合のみ', async () => {
+			const [user1, user2, user3, user4, root] = await Promise.all([
+				createUser({}, { email: 'user1@example.com', emailVerified: true }),
+				createUser({}, { email: 'user2@example.com', emailVerified: false }),
+				createUser({}, { email: null, emailVerified: false }),
+				createUser({}, { email: 'user4@example.com', emailVerified: true }),
+				createUser({ isRoot: true }, { email: 'root@example.com', emailVerified: true }),
+			]);
+
+			mockModeratorRole([user1, user2, user3, root]);
+			await service.notifyInactiveModeratorsWarning({ time: 1, asDays: 0, asHours: 0 });
+
+			expect(emailService.sendEmail).toHaveBeenCalledTimes(2);
+			expect(emailService.sendEmail.mock.calls[0][0]).toBe('user1@example.com');
+			expect(emailService.sendEmail.mock.calls[1][0]).toBe('root@example.com');
+		});
+
+		test('[systemWebhook] "inactiveModeratorsWarning"が有効なSystemWebhookに対して送信される', async () => {
+			const [user1] = await Promise.all([
+				createUser({}, { email: 'user1@example.com', emailVerified: true }),
+			]);
+
+			mockModeratorRole([user1]);
+			await service.notifyInactiveModeratorsWarning({ time: 1, asDays: 0, asHours: 0 });
+
+			expect(systemWebhookService.enqueueSystemWebhook).toHaveBeenCalledTimes(2);
+			expect(systemWebhookService.enqueueSystemWebhook.mock.calls[0][0]).toEqual(systemWebhook1);
+			expect(systemWebhookService.enqueueSystemWebhook.mock.calls[1][0]).toEqual(systemWebhook2);
+		});
+	});
+
+	describe('notifyChangeToInvitationOnly', () => {
+		test('[notification + mail] 通知はモデレータ全員に発信され、メールはメールアドレスが存在＋認証済みの場合のみ', async () => {
+			const [user1, user2, user3, user4, root] = await Promise.all([
+				createUser({}, { email: 'user1@example.com', emailVerified: true }),
+				createUser({}, { email: 'user2@example.com', emailVerified: false }),
+				createUser({}, { email: null, emailVerified: false }),
+				createUser({}, { email: 'user4@example.com', emailVerified: true }),
+				createUser({ isRoot: true }, { email: 'root@example.com', emailVerified: true }),
+			]);
+
+			mockModeratorRole([user1, user2, user3, root]);
+			await service.notifyChangeToInvitationOnly();
+
+			expect(announcementService.create).toHaveBeenCalledTimes(4);
+			expect(announcementService.create.mock.calls[0][0].userId).toBe(user1.id);
+			expect(announcementService.create.mock.calls[1][0].userId).toBe(user2.id);
+			expect(announcementService.create.mock.calls[2][0].userId).toBe(user3.id);
+			expect(announcementService.create.mock.calls[3][0].userId).toBe(root.id);
+
+			expect(emailService.sendEmail).toHaveBeenCalledTimes(2);
+			expect(emailService.sendEmail.mock.calls[0][0]).toBe('user1@example.com');
+			expect(emailService.sendEmail.mock.calls[1][0]).toBe('root@example.com');
+		});
+
+		test('[systemWebhook] "inactiveModeratorsInvitationOnlyChanged"が有効なSystemWebhookに対して送信される', async () => {
+			const [user1] = await Promise.all([
+				createUser({}, { email: 'user1@example.com', emailVerified: true }),
+			]);
+
+			mockModeratorRole([user1]);
+			await service.notifyChangeToInvitationOnly();
+
+			expect(systemWebhookService.enqueueSystemWebhook).toHaveBeenCalledTimes(1);
+			expect(systemWebhookService.enqueueSystemWebhook.mock.calls[0][0]).toEqual(systemWebhook2);
 		});
 	});
 });

packages/frontend/src/components/MkSystemWebhookEditor.vue

@@ -55,6 +55,18 @@ SPDX-License-Identifier: AGPL-3.0-only
 								</MkSwitch>
 								<MkButton v-show="mode === 'edit'" transparent :class="$style.testButton" :disabled="!(isActive && events.userCreated)" @click="test('userCreated')"><i class="ti ti-send"></i></MkButton>
 							</div>
+							<div :class="$style.switchBox">
+								<MkSwitch v-model="events.inactiveModeratorsWarning" :disabled="disabledEvents.inactiveModeratorsWarning">
+									<template #label>{{ i18n.ts._webhookSettings._systemEvents.inactiveModeratorsWarning }}</template>
+								</MkSwitch>
+								<MkButton v-show="mode === 'edit'" transparent :class="$style.testButton" :disabled="!(isActive && events.inactiveModeratorsWarning)" @click="test('inactiveModeratorsWarning')"><i class="ti ti-send"></i></MkButton>
+							</div>
+							<div :class="$style.switchBox">
+								<MkSwitch v-model="events.inactiveModeratorsInvitationOnlyChanged" :disabled="disabledEvents.inactiveModeratorsInvitationOnlyChanged">
+									<template #label>{{ i18n.ts._webhookSettings._systemEvents.inactiveModeratorsInvitationOnlyChanged }}</template>
+								</MkSwitch>
+								<MkButton v-show="mode === 'edit'" transparent :class="$style.testButton" :disabled="!(isActive && events.inactiveModeratorsInvitationOnlyChanged)" @click="test('inactiveModeratorsInvitationOnlyChanged')"><i class="ti ti-send"></i></MkButton>
+							</div>
 						</div>
 
 						<div v-show="mode === 'edit'" :class="$style.description">
@@ -100,6 +112,8 @@ type EventType = {
 	abuseReport: boolean;
 	abuseReportResolved: boolean;
 	userCreated: boolean;
+	inactiveModeratorsWarning: boolean;
+	inactiveModeratorsInvitationOnlyChanged: boolean;
 }
 
 const emit = defineEmits<{
@@ -123,6 +137,8 @@ const events = ref<EventType>({
 	abuseReport: true,
 	abuseReportResolved: true,
 	userCreated: true,
+	inactiveModeratorsWarning: true,
+	inactiveModeratorsInvitationOnlyChanged: true,
 });
 const isActive = ref<boolean>(true);
 
@@ -130,6 +146,8 @@ const disabledEvents = ref<EventType>({
 	abuseReport: false,
 	abuseReportResolved: false,
 	userCreated: false,
+	inactiveModeratorsWarning: false,
+	inactiveModeratorsInvitationOnlyChanged: false,
 });
 
 const disableSubmitButton = computed(() => {

packages/misskey-js/src/autogen/types.ts

@@ -5227,7 +5227,7 @@ export type components = {
       latestSentAt: string | null;
       latestStatus: number | null;
       name: string;
-      on: ('abuseReport' | 'abuseReportResolved' | 'userCreated')[];
+      on: ('abuseReport' | 'abuseReportResolved' | 'userCreated' | 'inactiveModeratorsWarning' | 'inactiveModeratorsInvitationOnlyChanged')[];
       url: string;
       secret: string;
     };
@@ -10657,7 +10657,7 @@ export type operations = {
         'application/json': {
           isActive: boolean;
           name: string;
-          on: ('abuseReport' | 'abuseReportResolved' | 'userCreated')[];
+          on: ('abuseReport' | 'abuseReportResolved' | 'userCreated' | 'inactiveModeratorsWarning' | 'inactiveModeratorsInvitationOnlyChanged')[];
           url: string;
           secret: string;
         };
@@ -10767,7 +10767,7 @@ export type operations = {
       content: {
         'application/json': {
           isActive?: boolean;
-          on?: ('abuseReport' | 'abuseReportResolved' | 'userCreated')[];
+          on?: ('abuseReport' | 'abuseReportResolved' | 'userCreated' | 'inactiveModeratorsWarning' | 'inactiveModeratorsInvitationOnlyChanged')[];
         };
       };
     };
@@ -10880,7 +10880,7 @@ export type operations = {
           id: string;
           isActive: boolean;
           name: string;
-          on: ('abuseReport' | 'abuseReportResolved' | 'userCreated')[];
+          on: ('abuseReport' | 'abuseReportResolved' | 'userCreated' | 'inactiveModeratorsWarning' | 'inactiveModeratorsInvitationOnlyChanged')[];
           url: string;
           secret: string;
         };
@@ -10939,7 +10939,7 @@ export type operations = {
           /** Format: misskey:id */
           webhookId: string;
           /** @enum {string} */
-          type: 'abuseReport' | 'abuseReportResolved' | 'userCreated';
+          type: 'abuseReport' | 'abuseReportResolved' | 'userCreated' | 'inactiveModeratorsWarning' | 'inactiveModeratorsInvitationOnlyChanged';
           override?: {
             url?: string;
             secret?: string;