Sharkey/packages/backend/src/core/UserFollowingService.ts

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import { Inject, Injectable } from '@nestjs/common';
import type { CacheableUser, ILocalUser, IRemoteUser, User } from '@/models/entities/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/schema.js';
import InstanceChart from '@/core/chart/charts/instance.js';
import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
import { WebhookService } from '@/core/WebhookService.js';
import { CreateNotificationService } from '@/core/CreateNotificationService.js';
import { DI } from '@/di-symbols.js';
import Logger from '../logger.js';
import { UserEntityService } from './entities/UserEntityService.js';
import { ApRendererService } from './remote/activitypub/ApRendererService.js';
const logger = new Logger('following/create');
type Local = ILocalUser | {
id: ILocalUser['id'];
host: ILocalUser['host'];
uri: ILocalUser['uri']
};
type Remote = IRemoteUser | {
id: IRemoteUser['id'];
host: IRemoteUser['host'];
uri: IRemoteUser['uri'];
inbox: IRemoteUser['inbox'];
};
type Both = Local | Remote;
@Injectable()
export class UserFollowingService {
constructor(
@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.blockingsRepository)
private blockingsRepository: BlockingsRepository,
@Inject(DI.instancesRepository)
private instancesRepository: InstancesRepository,
private userEntityService: UserEntityService,
private idService: IdService,
private queueService: QueueService,
private globalEventServie: GlobalEventService,
private createNotificationService: CreateNotificationService,
private federatedInstanceService: FederatedInstanceService,
private webhookService: WebhookService,
private apRendererService: ApRendererService,
private perUserFollowingChart: PerUserFollowingChart,
private instanceChart: InstanceChart,
) {
}
public async follow(_follower: { id: User['id'] }, _followee: { id: User['id'] }, requestId?: string): Promise<void> {
const [follower, followee] = await Promise.all([
this.usersRepository.findOneByOrFail({ id: _follower.id }),
this.usersRepository.findOneByOrFail({ id: _followee.id }),
]);
// check blocking
const [blocking, blocked] = await Promise.all([
this.blockingsRepository.findOneBy({
blockerId: follower.id,
blockeeId: followee.id,
}),
this.blockingsRepository.findOneBy({
blockerId: followee.id,
blockeeId: 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.renderActivity(this.apRendererService.renderReject(this.apRendererService.renderFollow(follower, followee, requestId), followee));
this.queueService.deliver(followee, content, follower.inbox);
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.blockingsRepository.delete(blocking.id);
} else {
// それ以外は単純に例外
if (blocking != null) throw new IdentifiableError('710e8fb0-b8c3-4922-be49-d5d93d8e6a6e', 'blocking');
if (blocked != null) 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
// 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))) {
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 following = await this.followingsRepository.findOneBy({
followerId: follower.id,
followeeId: followee.id,
});
if (following) {
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 followed = await this.followingsRepository.findOneBy({
followerId: followee.id,
followeeId: follower.id,
});
if (followed) autoAccept = true;
}
if (!autoAccept) {
await this.createFollowRequest(follower, followee, requestId);
return;
}
}
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await this.insertFollowingDoc(followee, follower);
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if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
const content = this.apRendererService.renderActivity(this.apRendererService.renderAccept(this.apRendererService.renderFollow(follower, followee, requestId), followee));
this.queueService.deliver(followee, content, follower.inbox);
}
}
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private async insertFollowingDoc(
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followee: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox']
},
follower: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox']
},
): Promise<void> {
if (follower.id === followee.id) return;
let alreadyFollowed = false as boolean;
await this.followingsRepository.insert({
id: this.idService.genId(),
createdAt: new Date(),
followerId: follower.id,
followeeId: followee.id,
// 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;
}
});
const req = await this.followRequestsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
if (req) {
await this.followRequestsRepository.delete({
followeeId: followee.id,
followerId: follower.id,
});
// 通知を作成
this.createNotificationService.createNotification(follower.id, 'followRequestAccepted', {
notifierId: followee.id,
});
}
if (alreadyFollowed) return;
//#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.registerOrFetchInstanceDoc(follower.host).then(i => {
this.instancesRepository.increment({ id: i.id }, 'followingCount', 1);
this.instanceChart.updateFollowing(i.host, true);
});
} else if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
this.federatedInstanceService.registerOrFetchInstanceDoc(followee.host).then(i => {
this.instancesRepository.increment({ id: i.id }, 'followersCount', 1);
this.instanceChart.updateFollowers(i.host, true);
});
}
//#endregion
this.perUserFollowingChart.update(follower, followee, true);
// Publish follow event
if (this.userEntityService.isLocalUser(follower)) {
this.userEntityService.pack(followee.id, follower, {
detail: true,
}).then(async packed => {
this.globalEventServie.publishUserEvent(follower.id, 'follow', packed as Packed<'UserDetailedNotMe'>);
this.globalEventServie.publishMainStream(follower.id, 'follow', packed as Packed<'UserDetailedNotMe'>);
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.globalEventServie.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.createNotificationService.createNotification(followee.id, 'follow', {
notifierId: follower.id,
});
}
}
public async unfollow(
follower: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox'];
},
followee: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox'];
},
silent = false,
): Promise<void> {
const following = await this.followingsRepository.findOneBy({
followerId: follower.id,
followeeId: followee.id,
});
if (following == null) {
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);
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this.decrementFollowing(follower, followee);
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// Publish unfollow event
if (!silent && this.userEntityService.isLocalUser(follower)) {
this.userEntityService.pack(followee.id, follower, {
detail: true,
}).then(async packed => {
this.globalEventServie.publishUserEvent(follower.id, 'unfollow', packed);
this.globalEventServie.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.renderActivity(this.apRendererService.renderUndo(this.apRendererService.renderFollow(follower, followee), follower));
this.queueService.deliver(follower, content, followee.inbox);
}
if (this.userEntityService.isLocalUser(followee) && this.userEntityService.isRemoteUser(follower)) {
// local user has null host
const content = this.apRendererService.renderActivity(this.apRendererService.renderReject(this.apRendererService.renderFollow(follower, followee), followee));
this.queueService.deliver(followee, content, follower.inbox);
}
}
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private async decrementFollowing(
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follower: {id: User['id']; host: User['host']; },
followee: { id: User['id']; host: User['host']; },
): Promise<void> {
//#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.registerOrFetchInstanceDoc(follower.host).then(i => {
this.instancesRepository.decrement({ id: i.id }, 'followingCount', 1);
this.instanceChart.updateFollowing(i.host, false);
});
} else if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
this.federatedInstanceService.registerOrFetchInstanceDoc(followee.host).then(i => {
this.instancesRepository.decrement({ id: i.id }, 'followersCount', 1);
this.instanceChart.updateFollowers(i.host, false);
});
}
//#endregion
this.perUserFollowingChart.update(follower, followee, false);
}
public async createFollowRequest(
follower: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox'];
},
followee: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox'];
},
requestId?: string,
): Promise<void> {
if (follower.id === followee.id) return;
// check blocking
const [blocking, blocked] = await Promise.all([
this.blockingsRepository.findOneBy({
blockerId: follower.id,
blockeeId: followee.id,
}),
this.blockingsRepository.findOneBy({
blockerId: followee.id,
blockeeId: follower.id,
}),
]);
if (blocking != null) throw new Error('blocking');
if (blocked != null) throw new Error('blocked');
const followRequest = await this.followRequestsRepository.insert({
id: this.idService.genId(),
createdAt: new Date(),
followerId: follower.id,
followeeId: followee.id,
requestId,
// 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.globalEventServie.publishMainStream(followee.id, 'receiveFollowRequest', packed));
this.userEntityService.pack(followee.id, followee, {
detail: true,
}).then(packed => this.globalEventServie.publishMainStream(followee.id, 'meUpdated', packed));
// 通知を作成
this.createNotificationService.createNotification(followee.id, 'receiveFollowRequest', {
notifierId: follower.id,
followRequestId: followRequest.id,
});
}
if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
const content = this.apRendererService.renderActivity(this.apRendererService.renderFollow(follower, followee));
this.queueService.deliver(follower, content, followee.inbox);
}
}
public async cancelFollowRequest(
followee: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']
},
follower: {
id: User['id']; host: User['host']; uri: User['host']
},
): Promise<void> {
if (this.userEntityService.isRemoteUser(followee)) {
const content = this.apRendererService.renderActivity(this.apRendererService.renderUndo(this.apRendererService.renderFollow(follower, followee), 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);
}
}
const request = await this.followRequestsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
if (request == null) {
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, {
detail: true,
}).then(packed => this.globalEventServie.publishMainStream(followee.id, 'meUpdated', packed));
}
public async acceptFollowRequest(
followee: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['sharedInbox'];
},
follower: CacheableUser,
): 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.');
}
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await this.insertFollowingDoc(followee, follower);
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if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
const content = this.apRendererService.renderActivity(this.apRendererService.renderAccept(this.apRendererService.renderFollow(follower, followee, request.requestId!), followee));
this.queueService.deliver(followee, content, follower.inbox);
}
this.userEntityService.pack(followee.id, followee, {
detail: true,
}).then(packed => this.globalEventServie.publishMainStream(followee.id, 'meUpdated', packed));
}
public async acceptAllFollowRequests(
user: {
id: User['id']; host: User['host']; uri: User['host']; inbox: User['inbox']; sharedInbox: User['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
*/
public async rejectFollowRequest(user: Local, follower: Both): Promise<void> {
if (this.userEntityService.isRemoteUser(follower)) {
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this.deliverReject(user, follower);
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}
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await this.removeFollowRequest(user, follower);
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if (this.userEntityService.isLocalUser(follower)) {
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this.publishUnfollow(user, follower);
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}
}
/**
* API following/reject
*/
public async rejectFollow(user: Local, follower: Both): Promise<void> {
if (this.userEntityService.isRemoteUser(follower)) {
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this.deliverReject(user, follower);
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}
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await this.removeFollow(user, follower);
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if (this.userEntityService.isLocalUser(follower)) {
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this.publishUnfollow(user, follower);
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}
}
/**
* AP Reject/Follow
*/
public async remoteReject(actor: Remote, follower: Local): Promise<void> {
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await this.removeFollowRequest(actor, follower);
await this.removeFollow(actor, follower);
this.publishUnfollow(actor, follower);
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}
/**
* Remove follow request record
*/
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private async removeFollowRequest(followee: Both, follower: Both): Promise<void> {
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const request = await this.followRequestsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
if (!request) return;
await this.followRequestsRepository.delete(request.id);
}
/**
* Remove follow record
*/
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private async removeFollow(followee: Both, follower: Both): Promise<void> {
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const following = await this.followingsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
if (!following) return;
await this.followingsRepository.delete(following.id);
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this.decrementFollowing(follower, followee);
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}
/**
* Deliver Reject to remote
*/
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private async deliverReject(followee: Local, follower: Remote): Promise<void> {
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const request = await this.followRequestsRepository.findOneBy({
followeeId: followee.id,
followerId: follower.id,
});
const content = this.apRendererService.renderActivity(this.apRendererService.renderReject(this.apRendererService.renderFollow(follower, followee, request?.requestId ?? undefined), followee));
this.queueService.deliver(followee, content, follower.inbox);
}
/**
* Publish unfollow to local
*/
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private async publishUnfollow(followee: Both, follower: Local): Promise<void> {
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const packedFollowee = await this.userEntityService.pack(followee.id, follower, {
detail: true,
});
this.globalEventServie.publishUserEvent(follower.id, 'unfollow', packedFollowee);
this.globalEventServie.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,
});
}
}
}