なんかもうめっちゃ変えた

packages/backend/src/core/NotePiningService.ts

@@ -0,0 +1,117 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { DI } from '@/di-symbols.js';
+import { UsersRepository } from '@/models/index.js';
+import { IdentifiableError } from '@/misc/identifiable-error.js';
+import type { User } from '@/models/entities/User.js';
+import type { Note } from '@/models/entities/Note.js';
+import { IdService } from '@/core/IdService.js';
+import type { UserNotePining } from '@/models/entities/UserNotePining.js';
+import { RelayService } from '@/core/RelayService.js';
+import { Config } from '@/config.js';
+import { UserEntityService } from './entities/UserEntityService.js';
+import { ApDeliverManagerService } from './remote/activitypub/ApDeliverManagerService.js';
+import { ApRendererService } from './remote/activitypub/ApRendererService.js';
+
+@Injectable()
+export class NotePiningService {
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.notesRepository)
+		private notesRepository: NotesRepository,
+
+		@Inject(DI.userNotePiningsRepository)
+		private userNotePiningsRepository: UserNotePiningsRepository,
+
+		private userEntityService: UserEntityService,
+		private idService: IdService,
+		private relayService: RelayService,
+		private apDeliverManagerService: ApDeliverManagerService,
+		private apRendererService: ApRendererService,
+	) {
+	}
+
+	/**
+	 * 指定した投稿をピン留めします
+	 * @param user
+	 * @param noteId
+	 */
+	public async addPinned(user: { id: User['id']; host: User['host']; }, noteId: Note['id']) {
+	// Fetch pinee
+		const note = await this.notesRepository.findOneBy({
+			id: noteId,
+			userId: user.id,
+		});
+
+		if (note == null) {
+			throw new IdentifiableError('70c4e51f-5bea-449c-a030-53bee3cce202', 'No such note.');
+		}
+
+		const pinings = await this.userNotePiningsRepository.findBy({ userId: user.id });
+
+		if (pinings.length >= 5) {
+			throw new IdentifiableError('15a018eb-58e5-4da1-93be-330fcc5e4e1a', 'You can not pin notes any more.');
+		}
+
+		if (pinings.some(pining => pining.noteId === note.id)) {
+			throw new IdentifiableError('23f0cf4e-59a3-4276-a91d-61a5891c1514', 'That note has already been pinned.');
+		}
+
+		await this.userNotePiningsRepository.insert({
+			id: this.idService.genId(),
+			createdAt: new Date(),
+			userId: user.id,
+			noteId: note.id,
+		} as UserNotePining);
+
+		// Deliver to remote followers
+		if (this.userEntityService.isLocalUser(user)) {
+			this.deliverPinnedChange(user.id, note.id, true);
+		}
+	}
+
+	/**
+	 * 指定した投稿のピン留めを解除します
+	 * @param user
+	 * @param noteId
+	 */
+	public async removePinned(user: { id: User['id']; host: User['host']; }, noteId: Note['id']) {
+	// Fetch unpinee
+		const note = await this.notesRepository.findOneBy({
+			id: noteId,
+			userId: user.id,
+		});
+
+		if (note == null) {
+			throw new IdentifiableError('b302d4cf-c050-400a-bbb3-be208681f40c', 'No such note.');
+		}
+
+		this.userNotePiningsRepository.delete({
+			userId: user.id,
+			noteId: note.id,
+		});
+
+		// Deliver to remote followers
+		if (this.userEntityService.isLocalUser(user)) {
+			this.deliverPinnedChange(user.id, noteId, false);
+		}
+	}
+
+	public async deliverPinnedChange(userId: User['id'], noteId: Note['id'], isAddition: boolean) {
+		const user = await this.usersRepository.findOneBy({ id: userId });
+		if (user == null) throw new Error('user not found');
+
+		if (!this.userEntityService.isLocalUser(user)) return;
+
+		const target = `${this.config.url}/users/${user.id}/collections/featured`;
+		const item = `${this.config.url}/notes/${noteId}`;
+		const content = this.apRendererService.renderActivity(isAddition ? this.apRendererService.renderAdd(user, target, item) : this.apRendererService.renderRemove(user, target, item));
+
+		this.apDeliverManagerService.deliverToFollowers(user, content);
+		this.relayService.deliverToRelays(user, content);
+	}
+}