refactoring

Resolve #7779

packages/backend/src/server/api/common/getters.ts

@@ -0,0 +1,56 @@
+import { IdentifiableError } from '@/misc/identifiable-error';
+import { User } from '@/models/entities/user';
+import { Note } from '@/models/entities/note';
+import { Notes, Users } from '@/models/index';
+
+/**
+ * Get note for API processing
+ */
+export async function getNote(noteId: Note['id']) {
+	const note = await Notes.findOne(noteId);
+
+	if (note == null) {
+		throw new IdentifiableError('9725d0ce-ba28-4dde-95a7-2cbb2c15de24', 'No such note.');
+	}
+
+	return note;
+}
+
+/**
+ * Get user for API processing
+ */
+export async function getUser(userId: User['id']) {
+	const user = await Users.findOne(userId);
+
+	if (user == null) {
+		throw new IdentifiableError('15348ddd-432d-49c2-8a5a-8069753becff', 'No such user.');
+	}
+
+	return user;
+}
+
+/**
+ * Get remote user for API processing
+ */
+export async function getRemoteUser(userId: User['id']) {
+	const user = await getUser(userId);
+
+	if (!Users.isRemoteUser(user)) {
+		throw new Error('user is not a remote user');
+	}
+
+	return user;
+}
+
+/**
+ * Get local user for API processing
+ */
+export async function getLocalUser(userId: User['id']) {
+	const user = await getUser(userId);
+
+	if (!Users.isLocalUser(user)) {
+		throw new Error('user is not a local user');
+	}
+
+	return user;
+}