refactor

1 files changed, 74 insertions, 0 deletions

diff --git a/packages/backend/src/server/api/GetterService.ts b/packages/backend/src/server/api/GetterService.ts
new file mode 100644
index 0000000000..70ab46ec35
--- /dev/null
+++ b/packages/backend/src/server/api/GetterService.ts
@@ -0,0 +1,74 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { DI } from '@/di-symbols.js';
+import type { NotesRepository, 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 { UserEntityService } from '@/core/entities/UserEntityService.js';
+
+@Injectable()
+export class GetterService {
+	constructor(
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.notesRepository)
+		private notesRepository: NotesRepository,
+
+		private userEntityService: UserEntityService,
+	) {
+	}
+
+	/**
+	 * Get note for API processing
+	 */
+	public async getNote(noteId: Note['id']) {
+		const note = await this.notesRepository.findOneBy({ id: noteId });
+
+		if (note == null) {
+			throw new IdentifiableError('9725d0ce-ba28-4dde-95a7-2cbb2c15de24', 'No such note.');
+		}
+
+		return note;
+	}
+
+	/**
+	 * Get user for API processing
+	 */
+	public async getUser(userId: User['id']) {
+		const user = await this.usersRepository.findOneBy({ id: userId });
+
+		if (user == null) {
+			throw new IdentifiableError('15348ddd-432d-49c2-8a5a-8069753becff', 'No such user.');
+		}
+
+		return user;
+	}
+
+	/**
+	 * Get remote user for API processing
+	 */
+	public async getRemoteUser(userId: User['id']) {
+		const user = await this.getUser(userId);
+
+		if (!this.userEntityService.isRemoteUser(user)) {
+			throw new Error('user is not a remote user');
+		}
+
+		return user;
+	}
+
+	/**
+	 * Get local user for API processing
+	 */
+	public async getLocalUser(userId: User['id']) {
+		const user = await this.getUser(userId);
+
+		if (!this.userEntityService.isLocalUser(user)) {
+			throw new Error('user is not a local user');
+		}
+
+		return user;
+	}
+}
+