refactor(backend): extract clip-related logics to ClipService

1 files changed, 152 insertions, 0 deletions

diff --git a/packages/backend/src/core/ClipService.ts b/packages/backend/src/core/ClipService.ts
new file mode 100644
index 0000000000..59f213c00c
--- /dev/null
+++ b/packages/backend/src/core/ClipService.ts
@@ -0,0 +1,152 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import * as Redis from 'ioredis';
+import { DI } from '@/di-symbols.js';
+import type { ClipsRepository, MiNote, MiClip, ClipNotesRepository, NotesRepository } from '@/models/_.js';
+import { bindThis } from '@/decorators.js';
+import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error.js';
+import { RoleService } from '@/core/RoleService.js';
+import { IdService } from '@/core/IdService.js';
+import type { MiLocalUser } from '@/models/entities/User.js';
+
+@Injectable()
+export class ClipService {
+	public static NoSuchClipError = class extends Error {};
+	public static AlreadyAddedError = class extends Error {};
+	public static TooManyClipNotesError = class extends Error {};
+	public static TooManyClipsError = class extends Error {};
+
+	constructor(
+		@Inject(DI.redis)
+		private redisClient: Redis.Redis,
+
+		@Inject(DI.redisForSub)
+		private redisForSub: Redis.Redis,
+
+		@Inject(DI.clipsRepository)
+		private clipsRepository: ClipsRepository,
+
+		@Inject(DI.clipNotesRepository)
+		private clipNotesRepository: ClipNotesRepository,
+
+		@Inject(DI.notesRepository)
+		private notesRepository: NotesRepository,
+
+		private roleService: RoleService,
+		private idService: IdService,
+	) {
+	}
+
+	@bindThis
+	public async create(me: MiLocalUser, name: string, isPublic: boolean, description: string | null): Promise<MiClip> {
+		const currentCount = await this.clipsRepository.countBy({
+			userId: me.id,
+		});
+		if (currentCount > (await this.roleService.getUserPolicies(me.id)).clipLimit) {
+			throw new ClipService.TooManyClipsError();
+		}
+
+		const clip = await this.clipsRepository.insert({
+			id: this.idService.genId(),
+			createdAt: new Date(),
+			userId: me.id,
+			name: name,
+			isPublic: isPublic,
+			description: description,
+		}).then(x => this.clipsRepository.findOneByOrFail(x.identifiers[0]));
+
+		return clip;
+	}
+
+	@bindThis
+	public async update(me: MiLocalUser, clipId: MiClip['id'], name: string | undefined, isPublic: boolean | undefined, description: string | null | undefined): Promise<void> {
+		const clip = await this.clipsRepository.findOneBy({
+			id: clipId,
+			userId: me.id,
+		});
+
+		if (clip == null) {
+			throw new ClipService.NoSuchClipError();
+		}
+
+		await this.clipsRepository.update(clip.id, {
+			name: name,
+			description: description,
+			isPublic: isPublic,
+		});
+	}
+
+	@bindThis
+	public async delete(me: MiLocalUser, clipId: MiClip['id']): Promise<void> {
+		const clip = await this.clipsRepository.findOneBy({
+			id: clipId,
+			userId: me.id,
+		});
+
+		if (clip == null) {
+			throw new ClipService.NoSuchClipError();
+		}
+
+		await this.clipsRepository.delete(clip.id);
+	}
+
+	@bindThis
+	public async addNote(me: MiLocalUser, clipId: MiClip['id'], noteId: MiNote['id']): Promise<void> {
+		const clip = await this.clipsRepository.findOneBy({
+			id: clipId,
+			userId: me.id,
+		});
+
+		if (clip == null) {
+			throw new ClipService.NoSuchClipError();
+		}
+
+		const currentCount = await this.clipNotesRepository.countBy({
+			clipId: clip.id,
+		});
+		if (currentCount > (await this.roleService.getUserPolicies(me.id)).noteEachClipsLimit) {
+			throw new ClipService.TooManyClipNotesError();
+		}
+
+		try {
+			await this.clipNotesRepository.insert({
+				id: this.idService.genId(),
+				noteId: noteId,
+				clipId: clip.id,
+			});
+		} catch (e) {
+			if (isDuplicateKeyValueError(e)) {
+				throw new ClipService.AlreadyAddedError();
+			}
+		}
+
+		this.clipsRepository.update(clip.id, {
+			lastClippedAt: new Date(),
+		});
+
+		this.notesRepository.increment({ id: noteId }, 'clippedCount', 1);
+	}
+
+	@bindThis
+	public async removeNote(me: MiLocalUser, clipId: MiClip['id'], noteId: MiNote['id']): Promise<void> {
+		const clip = await this.clipsRepository.findOneBy({
+			id: clipId,
+			userId: me.id,
+		});
+
+		if (clip == null) {
+			throw new ClipService.NoSuchClipError();
+		}
+
+		await this.clipNotesRepository.delete({
+			noteId: noteId,
+			clipId: clip.id,
+		});
+
+		this.notesRepository.decrement({ id: noteId }, 'clippedCount', 1);
+	}
+}