misskey/packages/backend/src/core/UserFollowingService.ts
2024-02-12 11:37:45 +09:00

719 lines
26 KiB
TypeScript

/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { Inject, Injectable, OnModuleInit } from '@nestjs/common';
import { ModuleRef } from '@nestjs/core';
import { IsNull } from 'typeorm';
import type { MiLocalUser, MiPartialLocalUser, MiPartialRemoteUser, MiRemoteUser, MiUser } from '@/models/User.js';
import { IdentifiableError } from '@/misc/identifiable-error.js';
import { QueueService } from '@/core/QueueService.js';
import PerUserFollowingChart from '@/core/chart/charts/per-user-following.js';
import { GlobalEventService } from '@/core/GlobalEventService.js';
import { IdService } from '@/core/IdService.js';
import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error.js';
import type { Packed } from '@/misc/json-schema.js';
import InstanceChart from '@/core/chart/charts/instance.js';
import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
import { WebhookService } from '@/core/WebhookService.js';
import { NotificationService } from '@/core/NotificationService.js';
import { DI } from '@/di-symbols.js';
import type { FollowingsRepository, FollowRequestsRepository, InstancesRepository, UserProfilesRepository, UsersRepository } from '@/models/_.js';
import { UserEntityService } from '@/core/entities/UserEntityService.js';
import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
import { bindThis } from '@/decorators.js';
import { UserBlockingService } from '@/core/UserBlockingService.js';
import { MetaService } from '@/core/MetaService.js';
import { CacheService } from '@/core/CacheService.js';
import type { Config } from '@/config.js';
import { AccountMoveService } from '@/core/AccountMoveService.js';
import { UtilityService } from '@/core/UtilityService.js';
import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
import Logger from '../logger.js';
const logger = new Logger('following/create');
type Local = MiLocalUser | {
id: MiLocalUser['id'];
host: MiLocalUser['host'];
uri: MiLocalUser['uri']
};
type Remote = MiRemoteUser | {
id: MiRemoteUser['id'];
host: MiRemoteUser['host'];
uri: MiRemoteUser['uri'];
inbox: MiRemoteUser['inbox'];
};
type Both = Local | Remote;
@Injectable()
export class UserFollowingService implements OnModuleInit {
private userBlockingService: UserBlockingService;
constructor(
private moduleRef: ModuleRef,
@Inject(DI.config)
private config: Config,
@Inject(DI.usersRepository)
private usersRepository: UsersRepository,
@Inject(DI.userProfilesRepository)
private userProfilesRepository: UserProfilesRepository,
@Inject(DI.followingsRepository)
private followingsRepository: FollowingsRepository,
@Inject(DI.followRequestsRepository)
private followRequestsRepository: FollowRequestsRepository,
@Inject(DI.instancesRepository)
private instancesRepository: InstancesRepository,
private cacheService: CacheService,
private utilityService: UtilityService,
private userEntityService: UserEntityService,
private idService: IdService,
private queueService: QueueService,
private globalEventService: GlobalEventService,
private metaService: MetaService,
private notificationService: NotificationService,
private federatedInstanceService: FederatedInstanceService,
private webhookService: WebhookService,
private apRendererService: ApRendererService,
private accountMoveService: AccountMoveService,
private fanoutTimelineService: FanoutTimelineService,
private perUserFollowingChart: PerUserFollowingChart,
private instanceChart: InstanceChart,
) {
}
onModuleInit() {
this.userBlockingService = this.moduleRef.get('UserBlockingService');
}
@bindThis
public async follow(
_follower: { id: MiUser['id'] },
_followee: { id: MiUser['id'] },
{ requestId, silent = false, withReplies }: {
requestId?: string,
silent?: boolean,
withReplies?: boolean,
} = {},
): Promise<void> {
const [follower, followee] = await Promise.all([
this.usersRepository.findOneByOrFail({ id: _follower.id }),
this.usersRepository.findOneByOrFail({ id: _followee.id }),
]) as [MiLocalUser | MiRemoteUser, MiLocalUser | MiRemoteUser];
// check blocking
const [blocking, blocked] = await Promise.all([
this.userBlockingService.checkBlocked(follower.id, followee.id),
this.userBlockingService.checkBlocked(followee.id, follower.id),
]);
if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee) && blocked) {
// リモートフォローを受けてブロックしていた場合は、エラーにするのではなくRejectを送り返しておしまい。
const content = this.apRendererService.addContext(this.apRendererService.renderReject(this.apRendererService.renderFollow(follower, followee, requestId), followee));
this.queueService.deliver(followee, content, follower.inbox, false);
return;
} else if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee) && blocking) {
// リモートフォローを受けてブロックされているはずの場合だったら、ブロック解除しておく。
await this.userBlockingService.unblock(follower, followee);
} else {
// それ以外は単純に例外
if (blocking) throw new IdentifiableError('710e8fb0-b8c3-4922-be49-d5d93d8e6a6e', 'blocking');
if (blocked) throw new IdentifiableError('3338392a-f764-498d-8855-db939dcf8c48', 'blocked');
}
const followeeProfile = await this.userProfilesRepository.findOneByOrFail({ userId: followee.id });
// フォロー対象が鍵アカウントである or
// フォロワーがBotであり、フォロー対象がBotからのフォローに慎重である or
// フォロワーがローカルユーザーであり、フォロー対象がリモートユーザーである or
// フォロワーがローカルユーザーであり、フォロー対象がサイレンスされているサーバーである
// 上記のいずれかに当てはまる場合はすぐフォローせずにフォローリクエストを発行しておく
if (
followee.isLocked ||
(followeeProfile.carefulBot && follower.isBot) ||
(this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee) && process.env.FORCE_FOLLOW_REMOTE_USER_FOR_TESTING !== 'true') ||
(this.userEntityService.isLocalUser(followee) && this.userEntityService.isRemoteUser(follower) && this.utilityService.isSilencedHost((await this.metaService.fetch()).silencedHosts, follower.host))
) {
let autoAccept = false;
// 鍵アカウントであっても、既にフォローされていた場合はスルー
const isFollowing = await this.followingsRepository.exists({
where: {
followerId: follower.id,
followeeId: followee.id,
},
});
if (isFollowing) {
autoAccept = true;
}
// フォローしているユーザーは自動承認オプション
if (!autoAccept && (this.userEntityService.isLocalUser(followee) && followeeProfile.autoAcceptFollowed)) {
const isFollowed = await this.followingsRepository.exists({
where: {
followerId: followee.id,
followeeId: follower.id,
},
});
if (isFollowed) autoAccept = true;
}
// Automatically accept if the follower is an account who has moved and the locked followee had accepted the old account.
if (followee.isLocked && !autoAccept) {
autoAccept = !!(await this.accountMoveService.validateAlsoKnownAs(
follower,
(oldSrc, newSrc) => this.followingsRepository.exists({
where: {
followeeId: followee.id,
followerId: newSrc.id,
},
}),
true,
));
}
if (!autoAccept) {
await this.createFollowRequest(follower, followee, requestId, withReplies);
return;
}
}
await this.insertFollowingDoc(followee, follower, silent, withReplies);
if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
const content = this.apRendererService.addContext(this.apRendererService.renderAccept(this.apRendererService.renderFollow(follower, followee, requestId), followee));
this.queueService.deliver(followee, content, follower.inbox, false);
}
}
@bindThis
private async insertFollowingDoc(
followee: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox']
},
follower: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox']
},
silent = false,
withReplies?: boolean,
): Promise<void> {
if (follower.id === followee.id) return;
let alreadyFollowed = false as boolean;
await this.followingsRepository.insert({
id: this.idService.gen(),
followerId: follower.id,
followeeId: followee.id,
withReplies: withReplies,
// 非正規化
followerHost: follower.host,
followerInbox: this.userEntityService.isRemoteUser(follower) ? follower.inbox : null,
followerSharedInbox: this.userEntityService.isRemoteUser(follower) ? follower.sharedInbox : null,
followeeHost: followee.host,
followeeInbox: this.userEntityService.isRemoteUser(followee) ? followee.inbox : null,
followeeSharedInbox: this.userEntityService.isRemoteUser(followee) ? followee.sharedInbox : null,
}).catch(err => {
if (isDuplicateKeyValueError(err) && this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
logger.info(`Insert duplicated ignore. ${follower.id} => ${followee.id}`);
alreadyFollowed = true;
} else {
throw err;
}
});
this.cacheService.userFollowingsCache.refresh(follower.id);
const requestExist = await this.followRequestsRepository.exists({
where: {
followeeId: followee.id,
followerId: follower.id,
},
});
if (requestExist) {
await this.followRequestsRepository.delete({
followeeId: followee.id,
followerId: follower.id,
});
// 通知を作成
this.notificationService.createNotification(follower.id, 'followRequestAccepted', {
}, followee.id);
}
if (alreadyFollowed) return;
this.globalEventService.publishInternalEvent('follow', { followerId: follower.id, followeeId: followee.id });
const [followeeUser, followerUser] = await Promise.all([
this.usersRepository.findOneByOrFail({ id: followee.id }),
this.usersRepository.findOneByOrFail({ id: follower.id }),
]);
// Neither followee nor follower has moved.
if (!followeeUser.movedToUri && !followerUser.movedToUri) {
//#region Increment counts
await Promise.all([
this.usersRepository.increment({ id: follower.id }, 'followingCount', 1),
this.usersRepository.increment({ id: followee.id }, 'followersCount', 1),
]);
//#endregion
//#region Update instance stats
if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
this.federatedInstanceService.fetch(follower.host).then(async i => {
this.instancesRepository.increment({ id: i.id }, 'followingCount', 1);
if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
this.instanceChart.updateFollowing(i.host, true);
}
});
} else if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
this.federatedInstanceService.fetch(followee.host).then(async i => {
this.instancesRepository.increment({ id: i.id }, 'followersCount', 1);
if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
this.instanceChart.updateFollowers(i.host, true);
}
});
}
//#endregion
this.perUserFollowingChart.update(follower, followee, true);
}
if (this.userEntityService.isLocalUser(follower) && !silent) {
// Publish follow event
this.userEntityService.pack(followee.id, follower, {
schema: 'UserDetailedNotMe',
}).then(async packed => {
this.globalEventService.publishMainStream(follower.id, 'follow', packed);
const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('follow'));
for (const webhook of webhooks) {
this.queueService.webhookDeliver(webhook, 'follow', {
user: packed,
});
}
});
}
// Publish followed event
if (this.userEntityService.isLocalUser(followee)) {
this.userEntityService.pack(follower.id, followee).then(async packed => {
this.globalEventService.publishMainStream(followee.id, 'followed', packed);
const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === followee.id && x.on.includes('followed'));
for (const webhook of webhooks) {
this.queueService.webhookDeliver(webhook, 'followed', {
user: packed,
});
}
});
// 通知を作成
this.notificationService.createNotification(followee.id, 'follow', {
}, follower.id);
}
}
@bindThis
public async unfollow(
follower: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox'];
},
followee: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox'];
},
silent = false,
): Promise<void> {
const following = await this.followingsRepository.findOne({
relations: {
follower: true,
followee: true,
},
where: {
followerId: follower.id,
followeeId: followee.id,
},
});
if (following === null || !following.follower || !following.followee) {
logger.warn('フォロー解除がリクエストされましたがフォローしていませんでした');
return;
}
await this.followingsRepository.delete(following.id);
this.cacheService.userFollowingsCache.refresh(follower.id);
this.decrementFollowing(following.follower, following.followee);
if (!silent && this.userEntityService.isLocalUser(follower)) {
// Publish unfollow event
this.userEntityService.pack(followee.id, follower, {
schema: 'UserDetailedNotMe',
}).then(async packed => {
this.globalEventService.publishMainStream(follower.id, 'unfollow', packed);
const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('unfollow'));
for (const webhook of webhooks) {
this.queueService.webhookDeliver(webhook, 'unfollow', {
user: packed,
});
}
});
}
if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
const content = this.apRendererService.addContext(this.apRendererService.renderUndo(this.apRendererService.renderFollow(follower as MiPartialLocalUser, followee as MiPartialRemoteUser), follower));
this.queueService.deliver(follower, content, followee.inbox, false);
}
if (this.userEntityService.isLocalUser(followee) && this.userEntityService.isRemoteUser(follower)) {
// local user has null host
const content = this.apRendererService.addContext(this.apRendererService.renderReject(this.apRendererService.renderFollow(follower as MiPartialRemoteUser, followee as MiPartialLocalUser), followee));
this.queueService.deliver(followee, content, follower.inbox, false);
}
}
@bindThis
private async decrementFollowing(
follower: MiUser,
followee: MiUser,
): Promise<void> {
this.globalEventService.publishInternalEvent('unfollow', { followerId: follower.id, followeeId: followee.id });
// Neither followee nor follower has moved.
if (!follower.movedToUri && !followee.movedToUri) {
//#region Decrement following / followers counts
await Promise.all([
this.usersRepository.decrement({ id: follower.id }, 'followingCount', 1),
this.usersRepository.decrement({ id: followee.id }, 'followersCount', 1),
]);
//#endregion
//#region Update instance stats
if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
this.federatedInstanceService.fetch(follower.host).then(async i => {
this.instancesRepository.decrement({ id: i.id }, 'followingCount', 1);
if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
this.instanceChart.updateFollowing(i.host, false);
}
});
} else if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
this.federatedInstanceService.fetch(followee.host).then(async i => {
this.instancesRepository.decrement({ id: i.id }, 'followersCount', 1);
if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
this.instanceChart.updateFollowers(i.host, false);
}
});
}
//#endregion
this.perUserFollowingChart.update(follower, followee, false);
} else {
// Adjust following/followers counts
for (const user of [follower, followee]) {
if (user.movedToUri) continue; // No need to update if the user has already moved.
const nonMovedFollowees = await this.followingsRepository.count({
relations: {
followee: true,
},
where: {
followerId: user.id,
followee: {
movedToUri: IsNull(),
},
},
});
const nonMovedFollowers = await this.followingsRepository.count({
relations: {
follower: true,
},
where: {
followeeId: user.id,
follower: {
movedToUri: IsNull(),
},
},
});
await this.usersRepository.update(
{ id: user.id },
{ followingCount: nonMovedFollowees, followersCount: nonMovedFollowers },
);
}
// TODO: adjust charts
}
}
@bindThis
public async createFollowRequest(
follower: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox'];
},
followee: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox'];
},
requestId?: string,
withReplies?: boolean,
): Promise<void> {
if (follower.id === followee.id) return;
// check blocking
const [blocking, blocked] = await Promise.all([
this.userBlockingService.checkBlocked(follower.id, followee.id),
this.userBlockingService.checkBlocked(followee.id, follower.id),
]);
if (blocking) throw new Error('blocking');
if (blocked) throw new Error('blocked');
const followRequest = await this.followRequestsRepository.insert({
id: this.idService.gen(),
followerId: follower.id,
followeeId: followee.id,
requestId,
withReplies,
// 非正規化
followerHost: follower.host,
followerInbox: this.userEntityService.isRemoteUser(follower) ? follower.inbox : undefined,
followerSharedInbox: this.userEntityService.isRemoteUser(follower) ? follower.sharedInbox : undefined,
followeeHost: followee.host,
followeeInbox: this.userEntityService.isRemoteUser(followee) ? followee.inbox : undefined,
followeeSharedInbox: this.userEntityService.isRemoteUser(followee) ? followee.sharedInbox : undefined,
}).then(x => this.followRequestsRepository.findOneByOrFail(x.identifiers[0]));
// Publish receiveRequest event
if (this.userEntityService.isLocalUser(followee)) {
this.userEntityService.pack(follower.id, followee).then(packed => this.globalEventService.publishMainStream(followee.id, 'receiveFollowRequest', packed));
this.userEntityService.pack(followee.id, followee, {
schema: 'MeDetailed',
}).then(packed => this.globalEventService.publishMainStream(followee.id, 'meUpdated', packed));
// 通知を作成
this.notificationService.createNotification(followee.id, 'receiveFollowRequest', {
}, follower.id);
}
if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
const content = this.apRendererService.addContext(this.apRendererService.renderFollow(follower as MiPartialLocalUser, followee as MiPartialRemoteUser, requestId ?? `${this.config.url}/follows/${followRequest.id}`));
this.queueService.deliver(follower, content, followee.inbox, false);
}
}
@bindThis
public async cancelFollowRequest(
followee: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']
},
follower: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']
},
): Promise<void> {
if (this.userEntityService.isRemoteUser(followee)) {
const content = this.apRendererService.addContext(this.apRendererService.renderUndo(this.apRendererService.renderFollow(follower as MiPartialLocalUser | MiPartialRemoteUser, followee as MiPartialRemoteUser), follower));
if (this.userEntityService.isLocalUser(follower)) { // 本来このチェックは不要だけどTSに怒られるので
this.queueService.deliver(follower, content, followee.inbox, false);
}
}
const requestExist = await this.followRequestsRepository.exists({
where: {
followeeId: followee.id,
followerId: follower.id,
},
});
if (!requestExist) {
throw new IdentifiableError('17447091-ce07-46dd-b331-c1fd4f15b1e7', 'request not found');
}
await this.followRequestsRepository.delete({
followeeId: followee.id,
followerId: follower.id,
});
this.userEntityService.pack(followee.id, followee, {
schema: 'MeDetailed',
}).then(packed => this.globalEventService.publishMainStream(followee.id, 'meUpdated', packed));
}
@bindThis
public async acceptFollowRequest(
followee: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox'];
},
follower: MiUser,
): Promise<void> {
const request = await this.followRequestsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
if (request == null) {
throw new IdentifiableError('8884c2dd-5795-4ac9-b27e-6a01d38190f9', 'No follow request.');
}
await this.insertFollowingDoc(followee, follower, false, request.withReplies);
if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
const content = this.apRendererService.addContext(this.apRendererService.renderAccept(this.apRendererService.renderFollow(follower, followee as MiPartialLocalUser, request.requestId!), followee));
this.queueService.deliver(followee, content, follower.inbox, false);
}
this.userEntityService.pack(followee.id, followee, {
schema: 'MeDetailed',
}).then(packed => this.globalEventService.publishMainStream(followee.id, 'meUpdated', packed));
}
@bindThis
public async acceptAllFollowRequests(
user: {
id: MiUser['id']; host: MiUser['host']; uri: MiUser['host']; inbox: MiUser['inbox']; sharedInbox: MiUser['sharedInbox'];
},
): Promise<void> {
const requests = await this.followRequestsRepository.findBy({
followeeId: user.id,
});
for (const request of requests) {
const follower = await this.usersRepository.findOneByOrFail({ id: request.followerId });
this.acceptFollowRequest(user, follower);
}
}
/**
* API following/request/reject
*/
@bindThis
public async rejectFollowRequest(user: Local, follower: Both): Promise<void> {
if (this.userEntityService.isRemoteUser(follower)) {
this.deliverReject(user, follower);
}
await this.removeFollowRequest(user, follower);
if (this.userEntityService.isLocalUser(follower)) {
this.publishUnfollow(user, follower);
}
}
/**
* API following/reject
*/
@bindThis
public async rejectFollow(user: Local, follower: Both): Promise<void> {
if (this.userEntityService.isRemoteUser(follower)) {
this.deliverReject(user, follower);
}
await this.removeFollow(user, follower);
if (this.userEntityService.isLocalUser(follower)) {
this.publishUnfollow(user, follower);
}
}
/**
* AP Reject/Follow
*/
@bindThis
public async remoteReject(actor: Remote, follower: Local): Promise<void> {
await this.removeFollowRequest(actor, follower);
await this.removeFollow(actor, follower);
this.publishUnfollow(actor, follower);
}
/**
* Remove follow request record
*/
@bindThis
private async removeFollowRequest(followee: Both, follower: Both): Promise<void> {
const request = await this.followRequestsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
if (!request) return;
await this.followRequestsRepository.delete(request.id);
}
/**
* Remove follow record
*/
@bindThis
private async removeFollow(followee: Both, follower: Both): Promise<void> {
const following = await this.followingsRepository.findOne({
relations: {
followee: true,
follower: true,
},
where: {
followeeId: followee.id,
followerId: follower.id,
},
});
if (!following || !following.followee || !following.follower) return;
await this.followingsRepository.delete(following.id);
this.decrementFollowing(following.follower, following.followee);
}
/**
* Deliver Reject to remote
*/
@bindThis
private async deliverReject(followee: Local, follower: Remote): Promise<void> {
const request = await this.followRequestsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
const content = this.apRendererService.addContext(this.apRendererService.renderReject(this.apRendererService.renderFollow(follower, followee, request?.requestId ?? undefined), followee));
this.queueService.deliver(followee, content, follower.inbox, false);
}
/**
* Publish unfollow to local
*/
@bindThis
private async publishUnfollow(followee: Both, follower: Local): Promise<void> {
const packedFollowee = await this.userEntityService.pack(followee.id, follower, {
schema: 'UserDetailedNotMe',
});
this.globalEventService.publishMainStream(follower.id, 'unfollow', packedFollowee);
const webhooks = (await this.webhookService.getActiveWebhooks()).filter(x => x.userId === follower.id && x.on.includes('unfollow'));
for (const webhook of webhooks) {
this.queueService.webhookDeliver(webhook, 'unfollow', {
user: packedFollowee,
});
}
}
@bindThis
public getFollowees(userId: MiUser['id']) {
return this.followingsRepository.createQueryBuilder('following')
.select('following.followeeId')
.where('following.followerId = :followerId', { followerId: userId })
.getMany();
}
}