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import { Brackets, In } from 'typeorm';
import { Injectable, Inject } from '@nestjs/common';
import type { User, LocalUser, RemoteUser } from '@/models/entities/User.js';
import type { Note, IMentionedRemoteUsers } from '@/models/entities/Note.js';
import type { InstancesRepository, NotesRepository, UsersRepository } from '@/models/index.js';
import { RelayService } from '@/core/RelayService.js';
import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
import { DI } from '@/di-symbols.js';
import type { Config } from '@/config.js';
import NotesChart from '@/core/chart/charts/notes.js';
import PerUserNotesChart from '@/core/chart/charts/per-user-notes.js';
import InstanceChart from '@/core/chart/charts/instance.js';
import { GlobalEventService } from '@/core/GlobalEventService.js';
import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
import { ApDeliverManagerService } from '@/core/activitypub/ApDeliverManagerService.js';
import { UserEntityService } from '@/core/entities/UserEntityService.js';
import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
import { bindThis } from '@/decorators.js';
import { MetaService } from '@/core/MetaService.js';
@Injectable()
export class NoteDeleteService {
constructor(
@Inject(DI.config)
private config: Config,
@Inject(DI.usersRepository)
private usersRepository: UsersRepository,
@Inject(DI.notesRepository)
private notesRepository: NotesRepository,
@Inject(DI.instancesRepository)
private instancesRepository: InstancesRepository,
private userEntityService: UserEntityService,
private noteEntityService: NoteEntityService,
private globalEventService: GlobalEventService,
private relayService: RelayService,
private federatedInstanceService: FederatedInstanceService,
private apRendererService: ApRendererService,
private apDeliverManagerService: ApDeliverManagerService,
private metaService: MetaService,
private notesChart: NotesChart,
private perUserNotesChart: PerUserNotesChart,
private instanceChart: InstanceChart,
) {}
/**
* 投稿を削除します。
* @param user 投稿者
* @param note 投稿
*/
async delete(user: { id: User['id']; uri: User['uri']; host: User['host']; isBot: User['isBot']; }, note: Note, quiet = false) {
const deletedAt = new Date();
// この投稿を除く指定したユーザーによる指定したノートのリノートが存在しないとき
if (note.renoteId && (await this.noteEntityService.countSameRenotes(user.id, note.renoteId, note.id)) === 0) {
this.notesRepository.decrement({ id: note.renoteId }, 'renoteCount', 1);
if (!user.isBot) this.notesRepository.decrement({ id: note.renoteId }, 'score', 1);
}
if (note.replyId) {
await this.notesRepository.decrement({ id: note.replyId }, 'repliesCount', 1);
}
if (!quiet) {
this.globalEventService.publishNoteStream(note.id, 'deleted', {
deletedAt: deletedAt,
});
//#region ローカルの投稿なら削除アクティビティを配送
if (this.userEntityService.isLocalUser(user) && !note.localOnly) {
let renote: Note | null = null;
// if deletd note is renote
if (note.renoteId && note.text == null && !note.hasPoll && (note.fileIds == null || note.fileIds.length === 0)) {
renote = await this.notesRepository.findOneBy({
id: note.renoteId,
});
}
const content = this.apRendererService.addContext(renote
? this.apRendererService.renderUndo(this.apRendererService.renderAnnounce(renote.uri ?? `${this.config.url}/notes/${renote.id}`, note), user)
: this.apRendererService.renderDelete(this.apRendererService.renderTombstone(`${this.config.url}/notes/${note.id}`), user));
this.deliverToConcerned(user, note, content);
}
// also deliever delete activity to cascaded notes
const cascadingNotes = (await this.findCascadingNotes(note)).filter(note => !note.localOnly); // filter out local-only notes
for (const cascadingNote of cascadingNotes) {
if (!cascadingNote.user) continue;
if (!this.userEntityService.isLocalUser(cascadingNote.user)) continue;
const content = this.apRendererService.addContext(this.apRendererService.renderDelete(this.apRendererService.renderTombstone(`${this.config.url}/notes/${cascadingNote.id}`), cascadingNote.user));
this.deliverToConcerned(cascadingNote.user, cascadingNote, content);
}
//#endregion
const meta = await this.metaService.fetch();
this.notesChart.update(note, false);
if (meta.enableChartsForRemoteUser || (user.host == null)) {
this.perUserNotesChart.update(user, note, false);
}
if (this.userEntityService.isRemoteUser(user)) {
this.federatedInstanceService.fetch(user.host).then(i => {
this.instancesRepository.decrement({ id: i.id }, 'notesCount', 1);
this.instanceChart.updateNote(i.host, note, false);
});
}
}
await this.notesRepository.delete({
id: note.id,
userId: user.id,
});
}
@bindThis
private async findCascadingNotes(note: Note) {
const cascadingNotes: Note[] = [];
const recursive = async (noteId: string) => {
const query = this.notesRepository.createQueryBuilder('note')
.where('note.replyId = :noteId', { noteId })
.orWhere(new Brackets(q => {
q.where('note.renoteId = :noteId', { noteId })
.andWhere('note.text IS NOT NULL');
}))
.leftJoinAndSelect('note.user', 'user');
const replies = await query.getMany();
for (const reply of replies) {
cascadingNotes.push(reply);
await recursive(reply.id);
}
};
await recursive(note.id);
return cascadingNotes.filter(note => note.userHost === null); // filter out non-local users
}
@bindThis
private async getMentionedRemoteUsers(note: Note) {
const where = [] as any[];
// mention / reply / dm
const uris = (JSON.parse(note.mentionedRemoteUsers) as IMentionedRemoteUsers).map(x => x.uri);
if (uris.length > 0) {
where.push(
{ uri: In(uris) },
);
}
// renote / quote
if (note.renoteUserId) {
where.push({
id: note.renoteUserId,
});
}
if (where.length === 0) return [];
return await this.usersRepository.find({
where,
}) as RemoteUser[];
}
@bindThis
private async deliverToConcerned(user: { id: LocalUser['id']; host: null; }, note: Note, content: any) {
this.apDeliverManagerService.deliverToFollowers(user, content);
this.relayService.deliverToRelays(user, content);
const remoteUsers = await this.getMentionedRemoteUsers(note);
for (const remoteUser of remoteUsers) {
this.apDeliverManagerService.deliverToUser(user, content, remoteUser);
}
}
}
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