서버 코드를 Router, Service, Repository 계층으로 분리하고 오류 처리 및 파일 삭제 로직 개선

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/lib/server/services/directory.ts

@@ -0,0 +1,58 @@
+import { DirectoryRepo, FileRepo } from "#lib/server/db/index.js";
+import type { Ciphertext } from "#lib/server/db/schema/index.js";
+import { AppError } from "#lib/server/errors.js";
+import { ensureFreshDekVersion } from "./common";
+import { schedulePendingFileDeletions } from "./fileDeletion";
+
+export const getDirectory = async (userId: number, directoryId: DirectoryId) => {
+  const directory =
+    directoryId !== "root" ? await DirectoryRepo.getDirectory(userId, directoryId) : undefined;
+  if (directory === null) {
+    throw new AppError("NOT_FOUND", "Directory not found");
+  }
+
+  const [subDirectories, files] = await Promise.all([
+    DirectoryRepo.getAllDirectoriesByParent(userId, directoryId),
+    FileRepo.getAllFilesByParent(userId, directoryId),
+  ]);
+  return { directory, subDirectories, files };
+};
+
+export const createDirectory = async (params: {
+  userId: number;
+  parentId: DirectoryId;
+  mekVersion: number;
+  encDek: string;
+  dekVersion: Date;
+  encName: Ciphertext;
+}) => {
+  ensureFreshDekVersion(params.dekVersion);
+  await DirectoryRepo.registerDirectory(params);
+};
+
+export const renameDirectory = async (
+  userId: number,
+  directoryId: number,
+  dekVersion: Date,
+  encName: Ciphertext,
+) => {
+  await DirectoryRepo.setDirectoryEncName(userId, directoryId, dekVersion, encName);
+};
+
+export const deleteDirectory = async (userId: number, directoryId: number) => {
+  const { deletedFileIds } = await DirectoryRepo.unregisterDirectory(userId, directoryId);
+  schedulePendingFileDeletions();
+  return { deletedFileIds };
+};
+
+export const getFavoriteDirectories = async (userId: number) => {
+  return await DirectoryRepo.getAllFavoriteDirectories(userId);
+};
+
+export const setDirectoryFavorite = async (
+  userId: number,
+  directoryId: number,
+  isFavorite: boolean,
+) => {
+  await DirectoryRepo.setDirectoryFavorite(userId, directoryId, isFavorite);
+};