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

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

kysely.config.ts

@@ -1,17 +1,17 @@
 import { defineConfig } from "kysely-ctl";
-import { Pool } from "pg";
+import { createDialect } from "./src/lib/server/db/dialect";
+
+// Empty values (e.g. `DATABASE_HOST=` in .env) are treated as unset, as in src/env.ts
+const optional = (name: string) => process.env[name] || undefined;
 
 export default defineConfig({
-  dialect: "pg",
-  dialectConfig: {
-    pool: new Pool({
-      host: process.env.DATABASE_HOST,
-      port: process.env.DATABASE_PORT ? parseInt(process.env.DATABASE_PORT) : undefined,
-      user: process.env.DATABASE_USER,
-      password: process.env.DATABASE_PASSWORD,
-      database: process.env.DATABASE_NAME,
-    }),
-  },
+  dialect: createDialect({
+    host: optional("DATABASE_HOST"),
+    port: optional("DATABASE_PORT") ? Number(optional("DATABASE_PORT")) : undefined,
+    user: optional("DATABASE_USER"),
+    password: optional("DATABASE_PASSWORD"),
+    name: optional("DATABASE_NAME"),
+  }),
   migrations: {
     migrationFolder: "./src/lib/server/db/migrations",
   },

package.json

@@ -70,7 +70,6 @@
     "node-schedule": "^2.1.1",
     "pg": "^8.23.1",
     "superjson": "^2.2.6",
-    "uuid": "^14.0.3",
     "zod": "^4.6.5"
   },
   "engines": {

pnpm-lock.yaml

@@ -29,9 +29,6 @@ importers:
       superjson:
         specifier: ^2.2.6
         version: 2.2.6
-      uuid:
-        specifier: ^14.0.3
-        version: 14.0.3
       zod:
         specifier: ^4.6.5
         version: 4.6.5
@@ -2470,10 +2467,6 @@ packages:
   util-deprecate@1.0.2:
     resolution: {integrity: sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==}
 
-  uuid@14.0.3:
-    resolution: {integrity: sha512-Sc5u1VVln93y1Xnz4R+CunOZc7R9LUcTmhj7Rc7Eg3HVcf7rVn2FOoa812fe0W8p3jD7xeoGSYbfqCGGH2B6xw==}
-    hasBin: true
-
   vite@8.3.4:
     resolution: {integrity: sha512-IftLE8phJhdNRIGNEV4JCCvfNScoZQVfcXaN8TQropWGJtOHcu+iAB9pHcuGvmEb/kddw0LBe/jS8ztdC6xdiQ==}
     engines: {node: ^20.19.0 || >=22.12.0}
@@ -4771,8 +4764,6 @@ snapshots:
 
   util-deprecate@1.0.2: {}
 
-  uuid@14.0.3: {}
-
   vite@8.3.4(@types/node@26.6.5)(jiti@1.21.7)(yaml@2.9.1):
     dependencies:
       lightningcss: 1.33.0

src/hooks.server.ts

@@ -1,23 +1,21 @@
 import { sequence, type ServerInit } from "@sveltejs/kit/hooks";
 import schedule from "node-schedule";
-import { cleanupExpiredUserClientChallenges } from "#lib/server/db/client.js";
+import { ClientRepo, SessionRepo } from "#lib/server/db/index.js";
 import { migrateDB } from "#lib/server/db/kysely.js";
-import {
-  cleanupExpiredSessions,
-  cleanupExpiredSessionUpgradeChallenges,
-} from "#lib/server/db/session.js";
 import { authenticate, setAgentInfo } from "#lib/server/middlewares/index.js";
-import { cleanupExpiredUploadSessions } from "#lib/server/services/upload.js";
+import { FileDeletionService, UploadService } from "#lib/server/services/index.js";
 
 export const init: ServerInit = async () => {
   await migrateDB();
 
   schedule.scheduleJob("0 * * * *", () => {
-    cleanupExpiredUserClientChallenges();
-    cleanupExpiredSessions();
-    cleanupExpiredSessionUpgradeChallenges();
-    cleanupExpiredUploadSessions();
+    ClientRepo.cleanupExpiredUserClientChallenges();
+    SessionRepo.cleanupExpiredSessions();
+    SessionRepo.cleanupExpiredSessionUpgradeChallenges();
+    UploadService.cleanupExpiredUploadSessions();
+    FileDeletionService.schedulePendingFileDeletions();
   });
+  FileDeletionService.schedulePendingFileDeletions();
 };
 
 export const handle = sequence(setAgentInfo, authenticate);

src/lib/schemas/filesystem.ts

@@ -1,4 +0,0 @@
-import { z } from "zod";
-
-export const DirectoryIdSchema = z.union([z.literal("root"), z.int().positive()]);
-export const CategoryIdSchema = z.union([z.literal("root"), z.int().positive()]);

src/lib/schemas/index.ts

@@ -1 +0,0 @@
-export * from "./filesystem";

src/lib/server/auth.ts

@@ -1,7 +1,7 @@
-import { error } from "@sveltejs/kit";
 import { ClientRepo, SessionRepo, IntegrityError } from "#lib/server/db/index.js";
-import env from "#lib/server/loadenv.js";
-import { verifySessionId } from "#lib/server/modules/crypto.js";
+import env from "#lib/server/config.js";
+import { verifySessionId } from "#lib/server/crypto.js";
+import { AppError } from "#lib/server/errors.js";
 
 export interface Session {
   sessionId: string;
@@ -26,16 +26,6 @@ export class AuthenticationError extends Error {
   }
 }
 
-export class AuthorizationError extends Error {
-  constructor(
-    public status: 403 | 500,
-    message: string,
-  ) {
-    super(message);
-    this.name = "AuthorizationError";
-  }
-}
-
 export const cookieOptions = {
   path: "/",
   maxAge: env.session.exp / 1000,
@@ -64,56 +54,21 @@ export const authenticate = async (sessionIdSigned: string, ip: string, userAgen
   }
 };
 
-export const authorizeInternal = async (
-  locals: App.Locals,
-  requiredPermission: SessionPermission,
-): Promise<Session> => {
-  if (!locals.session) {
-    throw new AuthorizationError(500, "Unauthenticated");
+const ensureUserClientState = async (
+  userId: number,
+  clientId: number | undefined,
+  state: "pending" | "active",
+) => {
+  if (!clientId) {
+    throw new AppError("FORBIDDEN", "Forbidden");
   }
 
-  const { id: sessionId, userId, clientId } = locals.session;
-
-  switch (requiredPermission) {
-    case "any":
-      break;
-    case "notClient":
-      if (clientId) {
-        throw new AuthorizationError(403, "Forbidden");
-      }
-      break;
-    case "anyClient":
-      if (!clientId) {
-        throw new AuthorizationError(403, "Forbidden");
-      }
-      break;
-    case "pendingClient": {
-      if (!clientId) {
-        throw new AuthorizationError(403, "Forbidden");
-      }
-      const userClient = await ClientRepo.getUserClient(userId, clientId);
-      if (!userClient) {
-        throw new AuthorizationError(500, "Invalid session id");
-      } else if (userClient.state !== "pending") {
-        throw new AuthorizationError(403, "Forbidden");
-      }
-      break;
-    }
-    case "activeClient": {
-      if (!clientId) {
-        throw new AuthorizationError(403, "Forbidden");
-      }
-      const userClient = await ClientRepo.getUserClient(userId, clientId);
-      if (!userClient) {
-        throw new AuthorizationError(500, "Invalid session id");
-      } else if (userClient.state !== "active") {
-        throw new AuthorizationError(403, "Forbidden");
-      }
-      break;
-    }
+  const userClient = await ClientRepo.getUserClient(userId, clientId);
+  if (!userClient) {
+    throw new AppError("INTERNAL_SERVER_ERROR", "Invalid session id");
+  } else if (userClient.state !== state) {
+    throw new AppError("FORBIDDEN", "Forbidden");
   }
-
-  return { sessionId, userId, clientId };
 };
 
 export async function authorize(
@@ -130,12 +85,32 @@ export async function authorize(
   locals: App.Locals,
   requiredPermission: SessionPermission,
 ): Promise<Session> {
-  try {
-    return await authorizeInternal(locals, requiredPermission);
-  } catch (e) {
-    if (e instanceof AuthorizationError) {
-      error(e.status, e.message);
-    }
-    throw e;
+  if (!locals.session) {
+    throw new AppError("UNAUTHORIZED", "Unauthenticated");
   }
+
+  const { id: sessionId, userId, clientId } = locals.session;
+
+  switch (requiredPermission) {
+    case "any":
+      break;
+    case "notClient":
+      if (clientId) {
+        throw new AppError("FORBIDDEN", "Forbidden");
+      }
+      break;
+    case "anyClient":
+      if (!clientId) {
+        throw new AppError("FORBIDDEN", "Forbidden");
+      }
+      break;
+    case "pendingClient":
+      await ensureUserClientState(userId, clientId, "pending");
+      break;
+    case "activeClient":
+      await ensureUserClientState(userId, clientId, "active");
+      break;
+  }
+
+  return { sessionId, userId, clientId };
 }

src/lib/server/db/dialect.ts

@@ -0,0 +1,22 @@
+import { PostgresDialect } from "kysely";
+import pg from "pg";
+
+export interface DatabaseConfig {
+  host?: string;
+  port?: number;
+  user?: string;
+  password?: string;
+  name?: string;
+}
+
+export const createDialect = (config: DatabaseConfig) => {
+  return new PostgresDialect({
+    pool: new pg.Pool({
+      host: config.host,
+      port: config.port,
+      user: config.user,
+      password: config.password,
+      database: config.name,
+    }),
+  });
+};

src/lib/server/db/error.ts

@@ -1,34 +1,41 @@
-type IntegrityErrorMessages =
-  // Category
-  | "Category not found"
-  // Challenge
-  | "Challenge already registered"
-  // Client
-  | "Public key(s) already registered"
-  | "User client already exists"
-  // File
-  | "Directory not found"
-  | "Directory already favorited"
-  | "Directory not favorited"
-  | "File not found"
-  | "File not found in category"
-  | "File already added to category"
-  | "File already favorited"
-  | "File not favorited"
-  | "Invalid DEK version"
-  // HSK
-  | "HSK already registered"
-  | "Inactive HSK version"
-  // MEK
-  | "MEK already registered"
-  | "Inactive MEK version"
-  // Session
-  | "Session not found"
-  | "Session already exists";
+import { AppError, type ErrorCode } from "#lib/server/errors.js";
 
-export class IntegrityError extends Error {
-  constructor(public message: IntegrityErrorMessages) {
-    super(message);
+const errorCodes = {
+  // Category
+  "Category not found": "NOT_FOUND",
+  // Challenge
+  "Challenge already registered": "CONFLICT",
+  // Client
+  "Public key(s) already registered": "CONFLICT",
+  "User client already exists": "CONFLICT",
+  // File
+  "Directory not found": "NOT_FOUND",
+  "Directory already favorited": "BAD_REQUEST",
+  "Directory not favorited": "BAD_REQUEST",
+  "File not found": "NOT_FOUND",
+  "File not found in category": "BAD_REQUEST",
+  "File already added to category": "BAD_REQUEST",
+  "File already favorited": "BAD_REQUEST",
+  "File not favorited": "BAD_REQUEST",
+  "Invalid DEK version": "CONFLICT",
+  // HSK
+  "HSK already registered": "CONFLICT",
+  "Inactive HSK version": "BAD_REQUEST",
+  // MEK
+  "MEK already registered": "CONFLICT",
+  "Inactive MEK version": "BAD_REQUEST",
+  // Session
+  "Session not found": "UNAUTHORIZED",
+  "Session already exists": "CONFLICT",
+  // Upload
+  "Upload session not found": "NOT_FOUND",
+} as const satisfies Record<string, ErrorCode>;
+
+type IntegrityErrorMessage = keyof typeof errorCodes;
+
+export class IntegrityError extends AppError {
+  constructor(public override readonly message: IntegrityErrorMessage) {
+    super(errorCodes[message], message);
     this.name = "IntegrityError";
   }
 }

src/lib/server/db/index.ts

@@ -1,12 +1,14 @@
-export * as CategoryRepo from "./category";
-export * as ClientRepo from "./client";
-export * as DirectoryRepo from "./directory";
-export * as FileRepo from "./file";
-export * as HskRepo from "./hsk";
-export * as MediaRepo from "./media";
-export * as MekRepo from "./mek";
-export * as SessionRepo from "./session";
-export * as UploadRepo from "./upload";
-export * as UserRepo from "./user";
+export * as CategoryRepo from "./repositories/category";
+export * as ClientRepo from "./repositories/client";
+export * as DirectoryRepo from "./repositories/directory";
+export * as FileRepo from "./repositories/file";
+export * as FileDeletionRepo from "./repositories/fileDeletion";
+export * as HskRepo from "./repositories/hsk";
+export * as MediaRepo from "./repositories/media";
+export * as MekRepo from "./repositories/mek";
+export * as SessionRepo from "./repositories/session";
+export * as UploadRepo from "./repositories/upload";
+export * as UserRepo from "./repositories/user";
 
 export * from "./error";
+export { default as db } from "./kysely";

src/lib/server/db/kysely.ts

@@ -1,21 +1,11 @@
-import { Kysely, PostgresDialect } from "kysely";
+import { Kysely } from "kysely";
 import { Migrator } from "kysely/migration";
-import pg from "pg";
-import env from "#lib/server/loadenv.js";
+import env from "#lib/server/config.js";
+import { createDialect } from "./dialect";
 import migrations from "./migrations";
 import type { Database } from "./schema";
 
-const dialect = new PostgresDialect({
-  pool: new pg.Pool({
-    host: env.database.host,
-    port: env.database.port,
-    user: env.database.user,
-    password: env.database.password,
-    database: env.database.name,
-  }),
-});
-
-const db = new Kysely<Database>({ dialect });
+const db = new Kysely<Database>({ dialect: createDialect(env.database) });
 
 export const migrateDB = async () => {
   if (env.nodeEnv !== "production") return;

src/lib/server/db/migrations/1791730000-AddFileDeletionQueue.ts

@@ -0,0 +1,17 @@
+import { Kysely } from "kysely";
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const up = async (db: Kysely<any>) => {
+  // fileDeletion.ts
+  await db.schema
+    .createTable("file_deletion_queue")
+    .addColumn("id", "integer", (col) => col.primaryKey().generatedAlwaysAsIdentity())
+    .addColumn("path", "text", (col) => col.notNull())
+    .addColumn("enqueued_at", "timestamp(3)", (col) => col.notNull())
+    .execute();
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const down = async (db: Kysely<any>) => {
+  await db.schema.dropTable("file_deletion_queue").execute();
+};

src/lib/server/db/migrations/index.ts

@@ -3,6 +3,7 @@ import * as AddFileCategory1737422340 from "./1737422340-AddFileCategory";
 import * as AddThumbnail1738409340 from "./1738409340-AddThumbnail";
 import * as AddChunkedUpload1768062380 from "./1768062380-AddChunkedUpload";
 import * as AddFavorites1768643000 from "./1768643000-AddFavorites";
+import * as AddFileDeletionQueue1791730000 from "./1791730000-AddFileDeletionQueue";
 
 export default {
   "1737357000-Initial": Initial1737357000,
@@ -10,4 +11,5 @@ export default {
   "1738409340-AddThumbnail": AddThumbnail1738409340,
   "1768062380-AddChunkedUpload": AddChunkedUpload1768062380,
   "1768643000-AddFavorites": AddFavorites1768643000,
+  "1791730000-AddFileDeletionQueue": AddFileDeletionQueue1791730000,
 };

src/lib/server/db/repositories/category.ts

@@ -1,8 +1,10 @@
-import { IntegrityError } from "./error";
-import db from "./kysely";
-import type { Ciphertext } from "./schema";
+import type { Selectable } from "kysely";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import type { CategoryTable, Ciphertext } from "../schema";
+import { lockActiveMekVersion } from "./mek";
 
-interface Category {
+export interface Category {
   id: number;
   parentId: CategoryId;
   userId: number;
@@ -14,6 +16,21 @@ interface Category {
 
 export type NewCategory = Omit<Category, "id">;
 
+// Timestamps are serialized as strings when the row is selected as JSON
+type CategoryRow = Omit<Selectable<CategoryTable>, "data_encryption_key_version"> & {
+  data_encryption_key_version: Date | string;
+};
+
+export const toCategory = (row: CategoryRow): Category => ({
+  id: row.id,
+  parentId: row.parent_id ?? "root",
+  userId: row.user_id,
+  mekVersion: row.master_encryption_key_version,
+  encDek: row.encrypted_data_encryption_key,
+  dekVersion: new Date(row.data_encryption_key_version),
+  encName: row.encrypted_name,
+});
+
 export const ensureCategoryExists = async (
   trx: typeof db,
   userId: number,
@@ -36,17 +53,7 @@ export const ensureCategoryExists = async (
 
 export const registerCategory = async (params: NewCategory) => {
   await db.transaction().execute(async (trx) => {
-    const mek = await trx
-      .selectFrom("master_encryption_key")
-      .select("version")
-      .where("user_id", "=", params.userId)
-      .where("state", "=", "active")
-      .limit(1)
-      .forUpdate()
-      .executeTakeFirst();
-    if (mek?.version !== params.mekVersion) {
-      throw new IntegrityError("Inactive MEK version");
-    }
+    await lockActiveMekVersion(trx, params.userId, params.mekVersion);
 
     await ensureCategoryExists(trx, params.userId, params.parentId);
 
@@ -81,18 +88,7 @@ export const getAllCategoriesByParent = async (userId: number, parentId: Categor
       ? query.where("parent_id", "is", null)
       : query.where("parent_id", "=", parentId);
   const categories = await query.execute();
-  return categories.map(
-    (category) =>
-      ({
-        id: category.id,
-        parentId: category.parent_id ?? "root",
-        userId: category.user_id,
-        mekVersion: category.master_encryption_key_version,
-        encDek: category.encrypted_data_encryption_key,
-        dekVersion: category.data_encryption_key_version,
-        encName: category.encrypted_name,
-      }) satisfies Category,
-  );
+  return categories.map(toCategory);
 };
 
 export const getCategory = async (userId: number, categoryId: number) => {
@@ -103,17 +99,7 @@ export const getCategory = async (userId: number, categoryId: number) => {
     .where("user_id", "=", userId)
     .limit(1)
     .executeTakeFirst();
-  return category
-    ? ({
-        id: category.id,
-        parentId: category.parent_id ?? "root",
-        userId: category.user_id,
-        mekVersion: category.master_encryption_key_version,
-        encDek: category.encrypted_data_encryption_key,
-        dekVersion: category.data_encryption_key_version,
-        encName: category.encrypted_name,
-      } satisfies Category)
-    : null;
+  return category ? toCategory(category) : null;
 };
 
 export const setCategoryEncName = async (

src/lib/server/db/repositories/client.ts

@@ -1,7 +1,7 @@
 import pg from "pg";
-import { IntegrityError } from "./error";
-import db from "./kysely";
-import type { UserClientState } from "./schema";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import type { UserClientState } from "../schema";
 
 interface Client {
   id: number;

src/lib/server/db/repositories/directory.ts

@@ -1,9 +1,11 @@
 import type { Selectable } from "kysely";
-import { IntegrityError } from "./error";
-import db from "./kysely";
-import type { Ciphertext, DirectoryTable } from "./schema";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import type { Ciphertext, DirectoryTable } from "../schema";
+import { enqueueFileDeletions } from "./fileDeletion";
+import { lockActiveMekVersion } from "./mek";
 
-interface Directory {
+export interface Directory {
   id: number;
   parentId: DirectoryId;
   userId: number;
@@ -47,17 +49,7 @@ export const ensureDirectoryExists = async (
 
 export const registerDirectory = async (params: Omit<Directory, "id" | "isFavorite">) => {
   await db.transaction().execute(async (trx) => {
-    const mek = await trx
-      .selectFrom("master_encryption_key")
-      .select("version")
-      .where("user_id", "=", params.userId)
-      .where("state", "=", "active")
-      .limit(1)
-      .forUpdate()
-      .executeTakeFirst();
-    if (mek?.version !== params.mekVersion) {
-      throw new IntegrityError("Inactive MEK version");
-    }
+    await lockActiveMekVersion(trx, params.userId, params.mekVersion);
 
     await ensureDirectoryExists(trx, params.userId, params.parentId);
 
@@ -251,50 +243,59 @@ export const setDirectoryFavorite = async (
 };
 
 export const unregisterDirectory = async (userId: number, directoryId: number) => {
-  return await db
-    .transaction()
-    .setIsolationLevel("repeatable read") // TODO: Sufficient?
-    .execute(async (trx) => {
-      const unregisterFiles = async (parentId: number) => {
-        const files = await trx
-          .selectFrom("file")
-          .leftJoin("thumbnail", "file.id", "thumbnail.file_id")
-          .select(["file.id", "file.path", "thumbnail.path as thumbnailPath"])
-          .where("file.parent_id", "=", parentId)
-          .where("file.user_id", "=", userId)
-          .forUpdate("file")
-          .execute();
-        await trx
-          .deleteFrom("file")
-          .where("parent_id", "=", parentId)
-          .where("user_id", "=", userId)
-          .execute();
-        return files;
-      };
-      const unregisterDirectoryRecursively = async (
-        directoryId: number,
-      ): Promise<{ id: number; path: string; thumbnailPath: string | null }[]> => {
-        const files = await unregisterFiles(directoryId);
-        const subDirectories = await trx
+  return await db.transaction().execute(async (trx) => {
+    const directories = await trx
+      .withRecursive("directory_tree", (db) =>
+        db
           .selectFrom("directory")
           .select("id")
-          .where("parent_id", "=", directoryId)
-          .where("user_id", "=", userId)
-          .execute();
-        const subDirectoryFilePaths = await Promise.all(
-          subDirectories.map(async ({ id }) => await unregisterDirectoryRecursively(id)),
-        );
-
-        const deleteRes = await trx
-          .deleteFrom("directory")
           .where("id", "=", directoryId)
           .where("user_id", "=", userId)
-          .executeTakeFirst();
-        if (deleteRes.numDeletedRows === 0n) {
-          throw new IntegrityError("Directory not found");
-        }
-        return files.concat(...subDirectoryFilePaths);
-      };
-      return await unregisterDirectoryRecursively(directoryId);
-    });
+          .unionAll(
+            db
+              .selectFrom("directory as d")
+              .innerJoin("directory_tree as dt", "d.parent_id", "dt.id")
+              .select("d.id"),
+          ),
+      )
+      .selectFrom("directory")
+      .select("id")
+      .where("id", "in", (eb) => eb.selectFrom("directory_tree").select("id"))
+      .forUpdate()
+      .execute();
+    if (directories.length === 0) {
+      throw new IntegrityError("Directory not found");
+    }
+
+    const directoryIds = directories.map(({ id }) => id);
+    const files = await trx
+      .selectFrom("file")
+      .leftJoin("thumbnail", "file.id", "thumbnail.file_id")
+      .select(["file.id", "file.path", "thumbnail.path as thumbnailPath"])
+      .where("file.parent_id", "in", directoryIds)
+      .forUpdate("file")
+      .execute();
+    const fileIds = files.map(({ id }) => id);
+
+    const uploadSessions = await trx
+      .deleteFrom("upload_session")
+      .where((eb) =>
+        eb.or([
+          eb("parent_id", "in", directoryIds),
+          ...(fileIds.length > 0 ? [eb("file_id", "in", fileIds)] : []),
+        ]),
+      )
+      .returning("path")
+      .execute();
+    if (fileIds.length > 0) {
+      await trx.deleteFrom("file").where("id", "in", fileIds).execute();
+    }
+    await trx.deleteFrom("directory").where("id", "in", directoryIds).execute();
+
+    await enqueueFileDeletions(trx, [
+      ...files.flatMap(({ path, thumbnailPath }) => [path, thumbnailPath]),
+      ...uploadSessions.map(({ path }) => path),
+    ]);
+    return { deletedFileIds: fileIds };
+  });
 };

src/lib/server/db/repositories/file.ts

@@ -1,11 +1,13 @@
 import { sql, type Selectable } from "kysely";
 import { jsonArrayFrom } from "kysely/helpers/postgres";
 import pg from "pg";
-import { IntegrityError } from "./error";
-import db from "./kysely";
-import type { Ciphertext, FileTable } from "./schema";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import type { Ciphertext, FileTable } from "../schema";
+import { toCategory } from "./category";
+import { enqueueFileDeletions } from "./fileDeletion";
 
-interface File {
+export interface File {
   id: number;
   parentId: DirectoryId;
   userId: number;
@@ -24,15 +26,6 @@ interface File {
   isFavorite: boolean;
 }
 
-interface FileCategory {
-  id: number;
-  parentId: CategoryId;
-  mekVersion: number;
-  encDek: string;
-  dekVersion: Date;
-  encName: Ciphertext;
-}
-
 const toFile = (row: Selectable<FileTable>): File => ({
   id: row.id,
   parentId: row.parent_id ?? "root",
@@ -209,17 +202,7 @@ export const getFilesWithCategories = async (userId: number, fileIds: number[])
     .execute();
   return files.map((file) => ({
     ...toFile(file),
-    categories: file.categories.map(
-      (category) =>
-        ({
-          id: category.id,
-          parentId: category.parent_id ?? "root",
-          mekVersion: category.master_encryption_key_version,
-          encDek: category.encrypted_data_encryption_key,
-          dekVersion: new Date(category.data_encryption_key_version),
-          encName: category.encrypted_name,
-        }) satisfies FileCategory,
-    ),
+    categories: file.categories.map(toCategory),
   }));
 };
 
@@ -387,7 +370,7 @@ export const setFileEncName = async (
 };
 
 export const unregisterFile = async (userId: number, fileId: number) => {
-  return await db.transaction().execute(async (trx) => {
+  await db.transaction().execute(async (trx) => {
     const file = await trx
       .selectFrom("file")
       .leftJoin("thumbnail", "file.id", "thumbnail.file_id")
@@ -400,8 +383,17 @@ export const unregisterFile = async (userId: number, fileId: number) => {
       throw new IntegrityError("File not found");
     }
 
+    const uploadSessions = await trx
+      .deleteFrom("upload_session")
+      .where("file_id", "=", fileId)
+      .returning("path")
+      .execute();
     await trx.deleteFrom("file").where("id", "=", fileId).execute();
-    return file;
+    await enqueueFileDeletions(trx, [
+      file.path,
+      file.thumbnailPath,
+      ...uploadSessions.map(({ path }) => path),
+    ]);
   });
 };
 
@@ -437,17 +429,7 @@ export const getAllFileCategories = async (fileId: number) => {
     .selectAll("category")
     .where("file_id", "=", fileId)
     .execute();
-  return categories.map(
-    (category) =>
-      ({
-        id: category.id,
-        parentId: category.parent_id ?? "root",
-        mekVersion: category.master_encryption_key_version,
-        encDek: category.encrypted_data_encryption_key,
-        dekVersion: category.data_encryption_key_version,
-        encName: category.encrypted_name,
-      }) satisfies FileCategory,
-  );
+  return categories.map(toCategory);
 };
 
 export const removeFileFromCategory = async (fileId: number, categoryId: number) => {

src/lib/server/db/repositories/fileDeletion.ts

@@ -0,0 +1,28 @@
+import db from "../kysely";
+
+export const enqueueFileDeletions = async (
+  trx: typeof db,
+  paths: (string | null | undefined)[],
+) => {
+  const values = paths
+    .filter((path) => !!path)
+    .map((path) => ({ path: path!, enqueued_at: new Date() }));
+  if (values.length > 0) {
+    await trx.insertInto("file_deletion_queue").values(values).execute();
+  }
+};
+
+export const getPendingFileDeletions = async (limit: number) => {
+  return await db
+    .selectFrom("file_deletion_queue")
+    .select(["id", "path"])
+    .orderBy("id")
+    .limit(limit)
+    .execute();
+};
+
+export const completeFileDeletions = async (ids: number[]) => {
+  if (ids.length > 0) {
+    await db.deleteFrom("file_deletion_queue").where("id", "in", ids).execute();
+  }
+};

src/lib/server/db/repositories/hsk.ts

@@ -1,7 +1,7 @@
 import pg from "pg";
-import { IntegrityError } from "./error";
-import db from "./kysely";
-import type { HskState } from "./schema";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import type { HskState } from "../schema";
 
 interface Hsk {
   userId: number;
@@ -11,6 +11,20 @@ interface Hsk {
   encHsk: string;
 }
 
+export const lockActiveHskVersion = async (trx: typeof db, userId: number, version: number) => {
+  const hsk = await trx
+    .selectFrom("hmac_secret_key")
+    .select("version")
+    .where("user_id", "=", userId)
+    .where("state", "=", "active")
+    .limit(1)
+    .forUpdate()
+    .executeTakeFirst();
+  if (hsk?.version !== version) {
+    throw new IntegrityError("Inactive HSK version");
+  }
+};
+
 export const registerInitialHsk = async (
   userId: number,
   createdBy: number,

src/lib/server/db/repositories/media.ts

@@ -1,6 +1,7 @@
 import type { NotNull } from "kysely";
-import { IntegrityError } from "./error";
-import db from "./kysely";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import { enqueueFileDeletions } from "./fileDeletion";
 
 interface Thumbnail {
   id: number;
@@ -60,7 +61,7 @@ export const updateFileThumbnail = async (
       }),
     )
     .execute();
-  return thumbnail?.oldPath ?? null;
+  await enqueueFileDeletions(trx, [thumbnail?.oldPath]);
 };
 
 export const getFileThumbnail = async (userId: number, fileId: number) => {

src/lib/server/db/repositories/mek.ts

@@ -1,7 +1,7 @@
 import pg from "pg";
-import { IntegrityError } from "./error";
-import db from "./kysely";
-import type { MekState } from "./schema";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import type { MekState } from "../schema";
 
 interface Mek {
   userId: number;
@@ -15,6 +15,20 @@ interface ClientMekWithDetails extends Mek {
   encMekSig: string;
 }
 
+export const lockActiveMekVersion = async (trx: typeof db, userId: number, version: number) => {
+  const mek = await trx
+    .selectFrom("master_encryption_key")
+    .select("version")
+    .where("user_id", "=", userId)
+    .where("state", "=", "active")
+    .limit(1)
+    .forUpdate()
+    .executeTakeFirst();
+  if (mek?.version !== version) {
+    throw new IntegrityError("Inactive MEK version");
+  }
+};
+
 export const registerInitialMek = async (
   userId: number,
   createdBy: number,

src/lib/server/db/repositories/session.ts

@@ -1,7 +1,7 @@
 import pg from "pg";
-import env from "#lib/server/loadenv.js";
-import { IntegrityError } from "./error";
-import db from "./kysely";
+import env from "#lib/server/config.js";
+import { IntegrityError } from "../error";
+import db from "../kysely";
 
 export const createSession = async (
   userId: number,

src/lib/server/db/repositories/upload.ts

@@ -1,8 +1,11 @@
-import { sql } from "kysely";
-import { IntegrityError } from "./error";
+import { sql, type Selectable } from "kysely";
+import { IntegrityError } from "../error";
+import db from "../kysely";
+import type { Ciphertext, UploadSessionTable } from "../schema";
 import { ensureDirectoryExists } from "./directory";
-import db from "./kysely";
-import type { Ciphertext } from "./schema";
+import { enqueueFileDeletions } from "./fileDeletion";
+import { lockActiveHskVersion } from "./hsk";
+import { lockActiveMekVersion } from "./mek";
 
 interface BaseUploadSession {
   id: string;
@@ -37,30 +40,10 @@ export const createFileUploadSession = async (
   params: Omit<FileUploadSession, "type" | "bitmap" | "uploadedChunks">,
 ) => {
   await db.transaction().execute(async (trx) => {
-    const mek = await trx
-      .selectFrom("master_encryption_key")
-      .select("version")
-      .where("user_id", "=", params.userId)
-      .where("state", "=", "active")
-      .limit(1)
-      .forUpdate()
-      .executeTakeFirst();
-    if (mek?.version !== params.mekVersion) {
-      throw new IntegrityError("Inactive MEK version");
-    }
+    await lockActiveMekVersion(trx, params.userId, params.mekVersion);
 
     if (params.hskVersion) {
-      const hsk = await trx
-        .selectFrom("hmac_secret_key")
-        .select("version")
-        .where("user_id", "=", params.userId)
-        .where("state", "=", "active")
-        .limit(1)
-        .forUpdate()
-        .executeTakeFirst();
-      if (hsk?.version !== params.hskVersion) {
-        throw new IntegrityError("Inactive HSK version");
-      }
+      await lockActiveHskVersion(trx, params.userId, params.hskVersion);
     }
 
     await ensureDirectoryExists(trx, params.userId, params.parentId);
@@ -124,18 +107,8 @@ export const createThumbnailUploadSession = async (
   });
 };
 
-export const getUploadSession = async (sessionId: string, userId: number) => {
-  const session = await db
-    .selectFrom("upload_session")
-    .selectAll()
-    .where("id", "=", sessionId)
-    .where("user_id", "=", userId)
-    .where("expires_at", ">", new Date())
-    .limit(1)
-    .executeTakeFirst();
-  if (!session) {
-    return null;
-  } else if (session.type === "file") {
+const toUploadSession = (session: Selectable<UploadSessionTable>) => {
+  if (session.type === "file") {
     return {
       type: "file",
       id: session.id,
@@ -171,6 +144,35 @@ export const getUploadSession = async (sessionId: string, userId: number) => {
   }
 };
 
+export const getUploadSession = async (sessionId: string, userId: number) => {
+  const session = await db
+    .selectFrom("upload_session")
+    .selectAll()
+    .where("id", "=", sessionId)
+    .where("user_id", "=", userId)
+    .where("expires_at", ">", new Date())
+    .limit(1)
+    .executeTakeFirst();
+  return session ? toUploadSession(session) : null;
+};
+
+// Locks the session until the transaction ends so that it can be completed only once
+export const lockUploadSession = async (trx: typeof db, sessionId: string, userId: number) => {
+  const session = await trx
+    .selectFrom("upload_session")
+    .selectAll()
+    .where("id", "=", sessionId)
+    .where("user_id", "=", userId)
+    .where("expires_at", ">", new Date())
+    .limit(1)
+    .forUpdate()
+    .executeTakeFirst();
+  if (!session) {
+    throw new IntegrityError("Upload session not found");
+  }
+  return toUploadSession(session);
+};
+
 export const markChunkAsUploaded = async (sessionId: string, chunkIndex: number) => {
   await db
     .updateTable("upload_session")
@@ -185,11 +187,30 @@ export const deleteUploadSession = async (trx: typeof db, sessionId: string) =>
   await trx.deleteFrom("upload_session").where("id", "=", sessionId).execute();
 };
 
+export const discardUploadSession = async (sessionId: string) => {
+  await db.transaction().execute(async (trx) => {
+    const sessions = await trx
+      .deleteFrom("upload_session")
+      .where("id", "=", sessionId)
+      .returning("path")
+      .execute();
+    await enqueueFileDeletions(
+      trx,
+      sessions.map(({ path }) => path),
+    );
+  });
+};
+
 export const cleanupExpiredUploadSessions = async () => {
-  const sessions = await db
-    .deleteFrom("upload_session")
-    .where("expires_at", "<=", new Date())
-    .returning("path")
-    .execute();
-  return sessions.map(({ path }) => path);
+  await db.transaction().execute(async (trx) => {
+    const sessions = await trx
+      .deleteFrom("upload_session")
+      .where("expires_at", "<=", new Date())
+      .returning("path")
+      .execute();
+    await enqueueFileDeletions(
+      trx,
+      sessions.map(({ path }) => path),
+    );
+  });
 };

src/lib/server/db/repositories/user.ts

@@ -1,4 +1,4 @@
-import db from "./kysely";
+import db from "../kysely";
 
 interface User {
   id: number;

src/lib/server/db/schema/fileDeletion.ts

@@ -0,0 +1,13 @@
+import type { ColumnType, Generated } from "kysely";
+
+export interface FileDeletionQueueTable {
+  id: Generated<number>;
+  path: string;
+  enqueued_at: ColumnType<Date, Date, never>;
+}
+
+declare module "./index" {
+  interface Database {
+    file_deletion_queue: FileDeletionQueueTable;
+  }
+}

src/lib/server/db/schema/index.ts

@@ -2,6 +2,7 @@ export * from "./category";
 export * from "./client";
 export * from "./directory";
 export * from "./file";
+export * from "./fileDeletion";
 export * from "./hsk";
 export * from "./media";
 export * from "./mek";

src/lib/server/errors.ts

@@ -0,0 +1,33 @@
+export type ErrorCode =
+  | "BAD_REQUEST"
+  | "UNAUTHORIZED"
+  | "FORBIDDEN"
+  | "NOT_FOUND"
+  | "CONFLICT"
+  | "RANGE_NOT_SATISFIABLE"
+  | "INTERNAL_SERVER_ERROR";
+
+const httpStatuses = {
+  BAD_REQUEST: 400,
+  UNAUTHORIZED: 401,
+  FORBIDDEN: 403,
+  NOT_FOUND: 404,
+  CONFLICT: 409,
+  RANGE_NOT_SATISFIABLE: 416,
+  INTERNAL_SERVER_ERROR: 500,
+} as const satisfies Record<ErrorCode, number>;
+
+// Expected errors that are safe to expose to clients
+export class AppError extends Error {
+  constructor(
+    public readonly code: ErrorCode,
+    message: string,
+  ) {
+    super(message);
+    this.name = "AppError";
+  }
+
+  get httpStatus() {
+    return httpStatuses[this.code];
+  }
+}

src/lib/server/http.ts

@@ -0,0 +1,18 @@
+import { error, type RequestEvent } from "@sveltejs/kit";
+import { AppError } from "#lib/server/errors.js";
+
+// Converts `AppError`s thrown by services into HTTP errors
+export const handleAppErrors = <Event extends RequestEvent>(
+  handler: (event: Event) => Promise<Response>,
+): ((event: Event) => Promise<Response>) => {
+  return async (event) => {
+    try {
+      return await handler(event);
+    } catch (e) {
+      if (e instanceof AppError) {
+        error(e.httpStatus, e.message);
+      }
+      throw e;
+    }
+  };
+};

src/lib/server/middlewares/authenticate.ts

@@ -1,6 +1,6 @@
 import { error, redirect } from "@sveltejs/kit";
 import type { Handle } from "@sveltejs/kit/hooks";
-import { cookieOptions, authenticate, AuthenticationError } from "#lib/server/modules/auth.js";
+import { cookieOptions, authenticate, AuthenticationError } from "#lib/server/auth.js";
 
 export const authenticateMiddleware: Handle = async ({ event, resolve }) => {
   try {

src/lib/server/modules/filesystem.ts

@@ -1,7 +0,0 @@
-import { unlink } from "fs/promises";
-
-export const safeUnlink = async (path: string | null | undefined) => {
-  if (path) {
-    await unlink(path).catch(console.error);
-  }
-};

src/lib/server/services/auth.ts

@@ -0,0 +1,99 @@
+import argon2 from "argon2";
+import { ClientRepo, IntegrityError, SessionRepo, UserRepo } from "#lib/server/db/index.js";
+import env from "#lib/server/config.js";
+import { issueSessionId } from "#lib/server/crypto.js";
+import { AppError } from "#lib/server/errors.js";
+import { createChallenge, verifyChallengeAnswer } from "./client";
+
+const MIN_PASSWORD_LENGTH = 8;
+
+export const login = async (email: string, password: string, ip: string, userAgent: string) => {
+  const user = await UserRepo.getUserByEmail(email);
+  if (!user || !(await argon2.verify(user.password, password))) {
+    throw new AppError("UNAUTHORIZED", "Invalid email or password");
+  }
+
+  const { sessionId, sessionIdSigned } = await issueSessionId(32, env.session.secret);
+  await SessionRepo.createSession(user.id, sessionId, ip, userAgent);
+  return { sessionIdSigned };
+};
+
+export const logout = async (sessionId: string) => {
+  await SessionRepo.deleteSession(sessionId);
+};
+
+export const changePassword = async (
+  userId: number,
+  sessionId: string,
+  oldPassword: string,
+  newPassword: string,
+) => {
+  if (oldPassword === newPassword) {
+    throw new AppError("BAD_REQUEST", "Same passwords");
+  } else if (newPassword.length < MIN_PASSWORD_LENGTH) {
+    throw new AppError("BAD_REQUEST", "Too short password");
+  }
+
+  const user = await UserRepo.getUser(userId);
+  if (!user) {
+    throw new AppError("INTERNAL_SERVER_ERROR", "Invalid session id");
+  } else if (!(await argon2.verify(user.password, oldPassword))) {
+    throw new AppError("FORBIDDEN", "Invalid password");
+  }
+
+  await UserRepo.setUserPassword(userId, await argon2.hash(newPassword));
+  await SessionRepo.deleteAllOtherSessions(userId, sessionId);
+};
+
+export const requestSessionUpgrade = async (
+  userId: number,
+  sessionId: string,
+  ip: string,
+  encPubKey: string,
+  sigPubKey: string,
+) => {
+  const client = await ClientRepo.getClientByPubKeys(encPubKey, sigPubKey);
+  if (!client) {
+    throw new AppError("UNAUTHORIZED", "Invalid public key(s)");
+  }
+
+  const userClient = await ClientRepo.getUserClient(userId, client.id);
+  if (!userClient || userClient.state === "challenging") {
+    throw new AppError("FORBIDDEN", "Unregistered client");
+  }
+
+  return await createChallenge(encPubKey, (answer) =>
+    SessionRepo.registerSessionUpgradeChallenge(
+      sessionId,
+      client.id,
+      answer,
+      ip,
+      new Date(Date.now() + env.challenge.sessionUpgradeExp),
+    ),
+  );
+};
+
+export const verifySessionUpgrade = async (
+  userId: number,
+  sessionId: string,
+  ip: string,
+  challengeId: number,
+  answerSig: string,
+  force: boolean,
+) => {
+  const challenge = await SessionRepo.consumeSessionUpgradeChallenge(challengeId, sessionId, ip);
+  const client = await verifyChallengeAnswer(challenge, answerSig);
+
+  try {
+    await SessionRepo.upgradeSession(userId, sessionId, client.id, force);
+  } catch (e) {
+    if (e instanceof IntegrityError) {
+      if (e.message === "Session not found") {
+        throw new AppError("INTERNAL_SERVER_ERROR", "Invalid challenge answer");
+      } else if (e.message === "Session already exists") {
+        throw new AppError("CONFLICT", "Already logged in");
+      }
+    }
+    throw e;
+  }
+};

src/lib/server/services/category.ts

@@ -0,0 +1,62 @@
+import { CategoryRepo, 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";
+
+export const getCategory = async (userId: number, categoryId: CategoryId, recurse: boolean) => {
+  const category =
+    categoryId !== "root" ? await CategoryRepo.getCategory(userId, categoryId) : undefined;
+  if (category === null) {
+    throw new AppError("NOT_FOUND", "Category not found");
+  }
+
+  const [subCategories, files] = await Promise.all([
+    CategoryRepo.getAllCategoriesByParent(userId, categoryId),
+    categoryId !== "root" ? FileRepo.getAllFilesByCategory(userId, categoryId, recurse) : undefined,
+  ]);
+  return { category, subCategories, files };
+};
+
+export const createCategory = async (params: CategoryRepo.NewCategory) => {
+  ensureFreshDekVersion(params.dekVersion);
+  await CategoryRepo.registerCategory(params);
+};
+
+export const renameCategory = async (
+  userId: number,
+  categoryId: number,
+  dekVersion: Date,
+  encName: Ciphertext,
+) => {
+  await CategoryRepo.setCategoryEncName(userId, categoryId, dekVersion, encName);
+};
+
+export const deleteCategory = async (userId: number, categoryId: number) => {
+  await CategoryRepo.unregisterCategory(userId, categoryId);
+};
+
+const ensureCategoryAndFileExist = async (userId: number, categoryId: number, fileId: number) => {
+  const [category, file] = await Promise.all([
+    CategoryRepo.getCategory(userId, categoryId),
+    FileRepo.getFile(userId, fileId),
+  ]);
+  if (!category) {
+    throw new AppError("NOT_FOUND", "Category not found");
+  } else if (!file) {
+    throw new AppError("NOT_FOUND", "File not found");
+  }
+};
+
+export const addFileToCategory = async (userId: number, categoryId: number, fileId: number) => {
+  await ensureCategoryAndFileExist(userId, categoryId, fileId);
+  await FileRepo.addFileToCategory(fileId, categoryId);
+};
+
+export const removeFileFromCategory = async (
+  userId: number,
+  categoryId: number,
+  fileId: number,
+) => {
+  await ensureCategoryAndFileExist(userId, categoryId, fileId);
+  await FileRepo.removeFileFromCategory(fileId, categoryId);
+};

src/lib/server/services/client.ts

@@ -0,0 +1,76 @@
+import { ClientRepo } from "#lib/server/db/index.js";
+import env from "#lib/server/config.js";
+import { generateChallenge, verifyPubKey, verifySignature } from "#lib/server/crypto.js";
+import { AppError } from "#lib/server/errors.js";
+
+const CHALLENGE_LENGTH = 32;
+
+export const createChallenge = async (
+  encPubKey: string,
+  register: (answer: string) => Promise<{ id: number }>,
+) => {
+  const { answer, challenge } = await generateChallenge(CHALLENGE_LENGTH, encPubKey);
+  const { id } = await register(answer.toString("base64"));
+  return { id, challenge: challenge.toString("base64") };
+};
+
+export const verifyChallengeAnswer = async (
+  challenge: { clientId: number; answer: string } | null,
+  answerSig: string,
+) => {
+  if (!challenge) {
+    throw new AppError("FORBIDDEN", "Invalid challenge answer");
+  }
+
+  const client = await ClientRepo.getClient(challenge.clientId);
+  if (!client) {
+    throw new AppError("INTERNAL_SERVER_ERROR", "Invalid challenge answer");
+  } else if (
+    !verifySignature(Buffer.from(challenge.answer, "base64"), answerSig, client.sigPubKey)
+  ) {
+    throw new AppError("FORBIDDEN", "Invalid challenge answer signature");
+  }
+  return client;
+};
+
+export const registerClient = async (
+  userId: number,
+  ip: string,
+  encPubKey: string,
+  sigPubKey: string,
+) => {
+  const getClientId = async () => {
+    const client = await ClientRepo.getClientByPubKeys(encPubKey, sigPubKey);
+    if (client) {
+      await ClientRepo.createUserClient(userId, client.id);
+      return client.id;
+    } else if (encPubKey === sigPubKey) {
+      throw new AppError("BAD_REQUEST", "Same public keys");
+    } else if (!verifyPubKey(encPubKey) || !verifyPubKey(sigPubKey)) {
+      throw new AppError("BAD_REQUEST", "Invalid public key(s)");
+    }
+    return (await ClientRepo.createClient(encPubKey, sigPubKey, userId)).id;
+  };
+
+  const clientId = await getClientId();
+  return await createChallenge(encPubKey, (answer) =>
+    ClientRepo.registerUserClientChallenge(
+      userId,
+      clientId,
+      answer,
+      ip,
+      new Date(Date.now() + env.challenge.userClientExp),
+    ),
+  );
+};
+
+export const verifyClient = async (
+  userId: number,
+  ip: string,
+  challengeId: number,
+  answerSig: string,
+) => {
+  const challenge = await ClientRepo.consumeUserClientChallenge(challengeId, userId, ip);
+  const client = await verifyChallengeAnswer(challenge, answerSig);
+  await ClientRepo.setUserClientStateToPending(userId, client.id);
+};

src/lib/server/services/common.ts

@@ -0,0 +1,10 @@
+import { AppError } from "#lib/server/errors.js";
+
+const DEK_VERSION_TOLERANCE = 60 * 1000; // 1 minute
+
+// DEK versions are creation timestamps generated by clients
+export const ensureFreshDekVersion = (dekVersion: Date) => {
+  if (Math.abs(dekVersion.getTime() - Date.now()) >= DEK_VERSION_TOLERANCE) {
+    throw new AppError("BAD_REQUEST", "Invalid DEK version");
+  }
+};

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);
+};

src/lib/server/services/file.ts

@@ -1,75 +1,82 @@
-import { error } from "@sveltejs/kit";
-import { createReadStream } from "fs";
-import { stat } from "fs/promises";
-import { Readable } from "stream";
 import { FileRepo, MediaRepo } from "#lib/server/db/index.js";
+import type { Ciphertext } from "#lib/server/db/schema/index.js";
+import { AppError } from "#lib/server/errors.js";
+import { createEncContentStream } from "#lib/server/storage/index.js";
+import { schedulePendingFileDeletions } from "./fileDeletion";
 
-export const createEncContentStream = async (
-  path: string,
-  iv?: Buffer,
-  range?: { start?: number; end?: number },
-) => {
-  const { size: fileSize } = await stat(path);
-  const ivSize = iv?.byteLength ?? 0;
-  const totalSize = fileSize + ivSize;
+type Range = { start?: number; end?: number };
 
-  const start = range?.start ?? 0;
-  const end = range?.end ?? totalSize - 1;
-  if (start > end || start < 0 || end >= totalSize) {
-    error(416, "Invalid range");
-  }
-
-  return {
-    encContentStream: Readable.toWeb(
-      Readable.from(
-        (async function* () {
-          if (start < ivSize) {
-            yield iv!.subarray(start, Math.min(end + 1, ivSize));
-          }
-          if (end >= ivSize) {
-            yield* createReadStream(path, {
-              start: Math.max(0, start - ivSize),
-              end: end - ivSize,
-            });
-          }
-        })(),
-      ),
-    ),
-    range: { start, end, total: totalSize },
-    isRangeRequest: !!range,
-  };
-};
-
-export const getFileStream = async (
-  userId: number,
-  fileId: number,
-  range?: { start?: number; end?: number },
-) => {
+export const getFile = async (userId: number, fileId: number) => {
   const file = await FileRepo.getFile(userId, fileId);
   if (!file) {
-    error(404, "Invalid file id");
+    throw new AppError("NOT_FOUND", "File not found");
   }
 
-  return createEncContentStream(
-    file.path,
-    file.encContentIv ? Buffer.from(file.encContentIv, "base64") : undefined,
-    range,
-  );
+  const categories = await FileRepo.getAllFileCategories(fileId);
+  return { ...file, categories };
 };
 
-export const getFileThumbnailStream = async (
+export const getFiles = async (userId: number, fileIds: number[]) => {
+  return await FileRepo.getFilesWithCategories(userId, fileIds);
+};
+
+export const getAllFileIds = async (userId: number) => {
+  return await FileRepo.getAllFileIds(userId);
+};
+
+export const getFileIdsByContentHmac = async (
+  userId: number,
+  hskVersion: number,
+  contentHmac: string,
+) => {
+  return await FileRepo.getAllFileIdsByContentHmac(userId, hskVersion, contentHmac);
+};
+
+export const getFilesWithoutThumbnail = async (userId: number) => {
+  return await FileRepo.getFilesWithoutThumbnail(userId);
+};
+
+export const renameFile = async (
   userId: number,
   fileId: number,
-  range?: { start?: number; end?: number },
+  dekVersion: Date,
+  encName: Ciphertext,
 ) => {
+  await FileRepo.setFileEncName(userId, fileId, dekVersion, encName);
+};
+
+export const deleteFile = async (userId: number, fileId: number) => {
+  await FileRepo.unregisterFile(userId, fileId);
+  schedulePendingFileDeletions();
+};
+
+export const getFavoriteFiles = async (userId: number) => {
+  return await FileRepo.getAllFavoriteFiles(userId);
+};
+
+export const setFileFavorite = async (userId: number, fileId: number, isFavorite: boolean) => {
+  await FileRepo.setFileFavorite(userId, fileId, isFavorite);
+};
+
+export const getFileThumbnail = async (userId: number, fileId: number) => {
   const thumbnail = await MediaRepo.getFileThumbnail(userId, fileId);
   if (!thumbnail) {
-    error(404, "File or its thumbnail not found");
+    throw new AppError("NOT_FOUND", "File or its thumbnail not found");
   }
+  return thumbnail;
+};
 
-  return createEncContentStream(
-    thumbnail.path,
-    thumbnail.encContentIv ? Buffer.from(thumbnail.encContentIv, "base64") : undefined,
-    range,
-  );
+const decodeIv = (iv: string | null) => (iv ? Buffer.from(iv, "base64") : undefined);
+
+export const getFileStream = async (userId: number, fileId: number, range?: Range) => {
+  const file = await FileRepo.getFile(userId, fileId);
+  if (!file) {
+    throw new AppError("NOT_FOUND", "File not found");
+  }
+  return await createEncContentStream(file.path, decodeIv(file.encContentIv), range);
+};
+
+export const getFileThumbnailStream = async (userId: number, fileId: number, range?: Range) => {
+  const thumbnail = await getFileThumbnail(userId, fileId);
+  return await createEncContentStream(thumbnail.path, decodeIv(thumbnail.encContentIv), range);
 };

src/lib/server/services/fileDeletion.ts

@@ -0,0 +1,44 @@
+import { FileDeletionRepo } from "#lib/server/db/index.js";
+import { deleteFile } from "#lib/server/storage/index.js";
+
+const BATCH_SIZE = 100;
+
+// Deletes files enqueued by committed transactions. Failed deletions are retried later.
+export const processPendingFileDeletions = async () => {
+  while (true) {
+    const deletions = await FileDeletionRepo.getPendingFileDeletions(BATCH_SIZE);
+    if (deletions.length === 0) return;
+
+    const results = await Promise.allSettled(deletions.map(({ path }) => deleteFile(path)));
+    const deletedIds = deletions
+      .filter((_, i) => results[i]!.status === "fulfilled")
+      .map(({ id }) => id);
+    results.forEach((result) => {
+      if (result.status === "rejected") console.error(result.reason);
+    });
+
+    await FileDeletionRepo.completeFileDeletions(deletedIds);
+    if (deletedIds.length < deletions.length) return; // Retry later
+  }
+};
+
+let processing: Promise<void> | undefined;
+let isRequestedAgain = false;
+
+export const schedulePendingFileDeletions = () => {
+  if (processing) {
+    isRequestedAgain = true;
+    return;
+  }
+
+  processing = (async () => {
+    do {
+      isRequestedAgain = false;
+      await processPendingFileDeletions();
+    } while (isRequestedAgain);
+  })()
+    .catch(console.error)
+    .finally(() => {
+      processing = undefined;
+    });
+};

src/lib/server/services/index.ts

@@ -0,0 +1,10 @@
+export * as AuthService from "./auth";
+export * as CategoryService from "./category";
+export * as ClientService from "./client";
+export * as DirectoryService from "./directory";
+export * as FileService from "./file";
+export * as FileDeletionService from "./fileDeletion";
+export * as KeyService from "./key";
+export * as SearchService from "./search";
+export * as UploadService from "./upload";
+export * as UserService from "./user";

src/lib/server/services/key.ts

@@ -0,0 +1,50 @@
+import { ClientRepo, HskRepo, MekRepo } from "#lib/server/db/index.js";
+import { verifySignature } from "#lib/server/crypto.js";
+import { AppError } from "#lib/server/errors.js";
+
+export const getClientMeks = async (userId: number, clientId: number) => {
+  return await MekRepo.getAllValidClientMeks(userId, clientId);
+};
+
+const verifyClientEncMekSig = async (
+  userId: number,
+  clientId: number,
+  version: number,
+  encMek: string,
+  encMekSig: string,
+) => {
+  const userClient = await ClientRepo.getUserClientWithDetails(userId, clientId);
+  if (!userClient) {
+    throw new AppError("INTERNAL_SERVER_ERROR", "Invalid session id");
+  }
+
+  const data = JSON.stringify({ version, key: encMek });
+  return verifySignature(Buffer.from(data), encMekSig, userClient.sigPubKey);
+};
+
+export const registerInitialMek = async (
+  userId: number,
+  clientId: number,
+  encMek: string,
+  encMekSig: string,
+) => {
+  if (!(await verifyClientEncMekSig(userId, clientId, 1, encMek, encMekSig))) {
+    throw new AppError("BAD_REQUEST", "Invalid signature");
+  }
+
+  await MekRepo.registerInitialMek(userId, clientId, encMek, encMekSig);
+  await ClientRepo.setUserClientStateToActive(userId, clientId);
+};
+
+export const getHsks = async (userId: number) => {
+  return await HskRepo.getAllValidHsks(userId);
+};
+
+export const registerInitialHsk = async (
+  userId: number,
+  clientId: number,
+  mekVersion: number,
+  encHsk: string,
+) => {
+  await HskRepo.registerInitialHsk(userId, clientId, mekVersion, encHsk);
+};

src/lib/server/services/search.ts

@@ -0,0 +1,31 @@
+import { DirectoryRepo, FileRepo } from "#lib/server/db/index.js";
+
+export const search = async (
+  userId: number,
+  filters: {
+    ancestorId: DirectoryId;
+    inFavorites: boolean;
+    includeCategoryIds: number[];
+    excludeCategoryIds: number[];
+  },
+) => {
+  // Directories can't belong to categories
+  const hasCategoryFilter =
+    filters.includeCategoryIds.length > 0 || filters.excludeCategoryIds.length > 0;
+
+  const [directories, files] = await Promise.all([
+    !hasCategoryFilter
+      ? DirectoryRepo.searchDirectories(userId, {
+          parentId: filters.ancestorId,
+          inFavorites: filters.inFavorites,
+        })
+      : [],
+    FileRepo.searchFiles(userId, {
+      parentId: filters.ancestorId,
+      inFavorites: filters.inFavorites,
+      includeCategoryIds: filters.includeCategoryIds,
+      excludeCategoryIds: filters.excludeCategoryIds,
+    }),
+  ]);
+  return { directories, files };
+};

src/lib/server/services/upload.ts

@@ -1,11 +1,18 @@
-import { error } from "@sveltejs/kit";
-import { open } from "fs/promises";
-import { Readable } from "stream";
-import { ENCRYPTION_OVERHEAD, ENCRYPTED_CHUNK_SIZE } from "#lib/constants/index.js";
-import { UploadRepo } from "#lib/server/db/index.js";
-import { safeUnlink } from "#lib/server/modules/filesystem.js";
+import type { Readable } from "stream";
+import { db, FileRepo, MediaRepo, UploadRepo } from "#lib/server/db/index.js";
+import type { Ciphertext } from "#lib/server/db/schema/index.js";
+import { AppError } from "#lib/server/errors.js";
+import {
+  deleteFile,
+  hashFile,
+  reserveFile,
+  writeChunkAtOffset,
+} from "#lib/server/storage/index.js";
+import { ensureFreshDekVersion } from "./common";
+import { schedulePendingFileDeletions } from "./fileDeletion";
 
-const chunkLocks = new Set<string>();
+const UPLOAD_EXPIRES = 24 * 3600 * 1000; // 24 hours
+const THUMBNAIL_CHUNKS = 1; // Up to 4 MiB
 
 export const isChunkUploaded = (bitmap: Buffer, chunkIndex: number) => {
   chunkIndex -= 1;
@@ -13,93 +20,173 @@ export const isChunkUploaded = (bitmap: Buffer, chunkIndex: number) => {
   return !!byte && (byte & (1 << (chunkIndex % 8))) !== 0; // Postgres sucks
 };
 
-const writeChunkAtOffset = async (
-  path: string,
-  encChunkStream: Readable,
-  chunkIndex: number,
-  isLastChunk: boolean,
+const withReservedFile = async <T>(
+  kind: "library" | "thumbnails",
+  userId: number,
+  callback: (path: string) => Promise<T>,
 ) => {
-  const offset = (chunkIndex - 1) * ENCRYPTED_CHUNK_SIZE;
-  const file = await open(path, "r+");
-  let written = 0;
-
+  const path = await reserveFile(kind, userId);
   try {
-    for await (const chunk of encChunkStream) {
-      const buffer = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk);
-      written += buffer.length;
-      if (written > ENCRYPTED_CHUNK_SIZE) {
-        throw new Error("Invalid chunk size");
-      }
-
-      let chunkOffset = 0;
-      while (chunkOffset < buffer.length) {
-        const { bytesWritten } = await file.write(
-          buffer,
-          chunkOffset,
-          buffer.length - chunkOffset,
-          offset + written - buffer.length + chunkOffset,
-        );
-        if (bytesWritten <= 0) {
-          throw new Error("Failed to write chunk");
-        }
-        chunkOffset += bytesWritten;
-      }
-    }
-
-    if (
-      (!isLastChunk && written !== ENCRYPTED_CHUNK_SIZE) ||
-      (isLastChunk && (written <= ENCRYPTION_OVERHEAD || written > ENCRYPTED_CHUNK_SIZE))
-    ) {
-      throw new Error("Invalid chunk size");
-    }
-
-    if (isLastChunk) {
-      await file.truncate(offset + written);
-    }
-
-    return written;
-  } finally {
-    await file.close();
+    return await callback(path);
+  } catch (e) {
+    await deleteFile(path).catch(console.error);
+    throw e;
   }
 };
 
+export const startFileUpload = async (params: {
+  userId: number;
+  totalChunks: number;
+  parentId: DirectoryId;
+  mekVersion: number;
+  encDek: string;
+  dekVersion: Date;
+  hskVersion: number | null;
+  contentType: string;
+  encName: Ciphertext;
+  encCreatedAt: Ciphertext | null;
+  encLastModifiedAt: Ciphertext;
+}) => {
+  ensureFreshDekVersion(params.dekVersion);
+
+  return await withReservedFile("library", params.userId, async (path) => {
+    const id = crypto.randomUUID();
+    await UploadRepo.createFileUploadSession({
+      ...params,
+      id,
+      path,
+      expiresAt: new Date(Date.now() + UPLOAD_EXPIRES),
+    });
+    return { uploadId: id };
+  });
+};
+
+export const startFileThumbnailUpload = async (
+  userId: number,
+  fileId: number,
+  dekVersion: Date,
+) => {
+  return await withReservedFile("thumbnails", userId, async (path) => {
+    const id = crypto.randomUUID();
+    await UploadRepo.createThumbnailUploadSession({
+      id,
+      type: "thumbnail",
+      userId,
+      path,
+      totalChunks: THUMBNAIL_CHUNKS,
+      expiresAt: new Date(Date.now() + UPLOAD_EXPIRES),
+      fileId,
+      dekVersion,
+    });
+    return { uploadId: id };
+  });
+};
+
 export const uploadChunk = async (
   userId: number,
   sessionId: string,
   chunkIndex: number,
   encChunkStream: Readable,
 ) => {
-  const lockKey = `${sessionId}/${chunkIndex}`;
-  if (chunkLocks.has(lockKey)) {
-    error(409, "Chunk upload already in progress");
-  } else {
-    chunkLocks.add(lockKey);
+  const session = await UploadRepo.getUploadSession(sessionId, userId);
+  if (!session) {
+    throw new AppError("NOT_FOUND", "Invalid upload id");
+  } else if (chunkIndex > session.totalChunks) {
+    throw new AppError("BAD_REQUEST", "Invalid chunk index");
+  } else if (isChunkUploaded(session.bitmap, chunkIndex)) {
+    throw new AppError("CONFLICT", "Chunk already uploaded");
   }
 
-  try {
-    const session = await UploadRepo.getUploadSession(sessionId, userId);
-    if (!session) {
-      error(404, "Invalid upload id");
-    } else if (chunkIndex > session.totalChunks) {
-      error(400, "Invalid chunk index");
-    } else if (isChunkUploaded(session.bitmap, chunkIndex)) {
-      error(409, "Chunk already uploaded");
+  // Concurrent uploads of the same chunk may corrupt the file, which will be detected by the
+  // hash verification on completion
+  const isLastChunk = chunkIndex === session.totalChunks;
+  await writeChunkAtOffset(session.path, encChunkStream, chunkIndex, isLastChunk);
+  await UploadRepo.markChunkAsUploaded(sessionId, chunkIndex);
+};
+
+const getCompletedUploadSession = async <T extends "file" | "thumbnail">(
+  userId: number,
+  uploadId: string,
+  type: T,
+) => {
+  const session = await UploadRepo.getUploadSession(uploadId, userId);
+  if (session?.type !== type) {
+    throw new AppError("NOT_FOUND", "Invalid upload id");
+  } else if (session.uploadedChunks < session.totalChunks) {
+    throw new AppError("BAD_REQUEST", "Upload not completed");
+  }
+  return session as Extract<NonNullable<typeof session>, { type: T }>;
+};
+
+export const completeFileUpload = async (
+  userId: number,
+  uploadId: string,
+  contentHmac: string | null,
+  encContentHash: string,
+) => {
+  const session = await getCompletedUploadSession(userId, uploadId, "file");
+  if (!!session.hskVersion !== !!contentHmac) {
+    throw new AppError("BAD_REQUEST", "Invalid content HMAC");
+  }
+
+  const hash = await hashFile(session.path);
+  if (hash !== encContentHash) {
+    await UploadRepo.discardUploadSession(uploadId);
+    schedulePendingFileDeletions();
+    throw new AppError("CONFLICT", "Uploaded file corrupted");
+  }
+
+  return await db.transaction().execute(async (trx) => {
+    // Locking the session ensures that it is completed only once
+    const lockedSession = await UploadRepo.lockUploadSession(trx, uploadId, userId);
+    if (lockedSession.type !== "file") {
+      throw new AppError("NOT_FOUND", "Invalid upload id");
     }
 
-    const isLastChunk = chunkIndex === session.totalChunks;
-    await writeChunkAtOffset(session.path, encChunkStream, chunkIndex, isLastChunk);
-    await UploadRepo.markChunkAsUploaded(sessionId, chunkIndex);
-  } catch (e) {
-    if (e instanceof Error && e.message === "Invalid chunk size") {
-      error(400, "Invalid request body");
+    const { id: fileId } = await FileRepo.registerFile(trx, {
+      parentId: lockedSession.parentId,
+      userId,
+      path: lockedSession.path,
+      mekVersion: lockedSession.mekVersion,
+      encDek: lockedSession.encDek,
+      dekVersion: lockedSession.dekVersion,
+      hskVersion: lockedSession.hskVersion,
+      contentHmac,
+      contentType: lockedSession.contentType,
+      encContentIv: null,
+      encContentHash: hash,
+      encName: lockedSession.encName,
+      encCreatedAt: lockedSession.encCreatedAt,
+      encLastModifiedAt: lockedSession.encLastModifiedAt,
+    });
+    await UploadRepo.deleteUploadSession(trx, uploadId);
+    return { fileId };
+  });
+};
+
+export const completeFileThumbnailUpload = async (userId: number, uploadId: string) => {
+  await getCompletedUploadSession(userId, uploadId, "thumbnail");
+
+  await db.transaction().execute(async (trx) => {
+    const session = await UploadRepo.lockUploadSession(trx, uploadId, userId);
+    if (session.type !== "thumbnail") {
+      throw new AppError("NOT_FOUND", "Invalid upload id");
     }
-    throw e;
-  } finally {
-    chunkLocks.delete(lockKey);
-  }
+
+    await MediaRepo.updateFileThumbnail(
+      trx,
+      userId,
+      session.fileId,
+      session.dekVersion,
+      session.path,
+      null,
+    );
+    await UploadRepo.deleteUploadSession(trx, uploadId);
+  });
+  schedulePendingFileDeletions();
 };
 
 export const cleanupExpiredUploadSessions = async () => {
-  const paths = await UploadRepo.cleanupExpiredUploadSessions();
-  await Promise.all(paths.map(safeUnlink));
+  await UploadRepo.cleanupExpiredUploadSessions();
+  schedulePendingFileDeletions();
 };

src/lib/server/services/user.ts

@@ -0,0 +1,10 @@
+import { UserRepo } from "#lib/server/db/index.js";
+import { AppError } from "#lib/server/errors.js";
+
+export const getUser = async (userId: number) => {
+  const user = await UserRepo.getUser(userId);
+  if (!user) {
+    throw new AppError("INTERNAL_SERVER_ERROR", "Invalid session id");
+  }
+  return user;
+};

src/lib/server/storage/chunks.ts

@@ -0,0 +1,56 @@
+import { open } from "fs/promises";
+import type { Readable } from "stream";
+import { ENCRYPTION_OVERHEAD, ENCRYPTED_CHUNK_SIZE } from "#lib/constants/index.js";
+import { AppError } from "#lib/server/errors.js";
+
+const invalidChunkSize = () => new AppError("BAD_REQUEST", "Invalid chunk size");
+
+export const writeChunkAtOffset = async (
+  path: string,
+  encChunkStream: Readable,
+  chunkIndex: number,
+  isLastChunk: boolean,
+) => {
+  const offset = (chunkIndex - 1) * ENCRYPTED_CHUNK_SIZE;
+  const file = await open(path, "r+");
+  let written = 0;
+
+  try {
+    for await (const chunk of encChunkStream) {
+      const buffer = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk);
+      written += buffer.length;
+      if (written > ENCRYPTED_CHUNK_SIZE) {
+        throw invalidChunkSize();
+      }
+
+      let chunkOffset = 0;
+      while (chunkOffset < buffer.length) {
+        const { bytesWritten } = await file.write(
+          buffer,
+          chunkOffset,
+          buffer.length - chunkOffset,
+          offset + written - buffer.length + chunkOffset,
+        );
+        if (bytesWritten <= 0) {
+          throw new Error("Failed to write chunk");
+        }
+        chunkOffset += bytesWritten;
+      }
+    }
+
+    if (
+      (!isLastChunk && written !== ENCRYPTED_CHUNK_SIZE) ||
+      (isLastChunk && (written <= ENCRYPTION_OVERHEAD || written > ENCRYPTED_CHUNK_SIZE))
+    ) {
+      throw invalidChunkSize();
+    }
+
+    if (isLastChunk) {
+      await file.truncate(offset + written);
+    }
+
+    return written;
+  } finally {
+    await file.close();
+  }
+};

src/lib/server/storage/files.ts

@@ -0,0 +1,37 @@
+import { createHash, randomUUID } from "crypto";
+import { createReadStream } from "fs";
+import { mkdir, open, unlink } from "fs/promises";
+import { dirname } from "path";
+import env from "#lib/server/config.js";
+
+const roots = {
+  library: () => env.libraryPath,
+  thumbnails: () => env.thumbnailsPath,
+};
+
+// Creates an empty file at a new path so that it can't be taken by others
+export const reserveFile = async (kind: keyof typeof roots, userId: number) => {
+  const path = `${roots[kind]()}/${userId}/${randomUUID()}`;
+  await mkdir(dirname(path), { recursive: true });
+  const file = await open(path, "wx", 0o600);
+  await file.close();
+  return path;
+};
+
+export const deleteFile = async (path: string) => {
+  try {
+    await unlink(path);
+  } catch (e) {
+    if ((e as NodeJS.ErrnoException).code !== "ENOENT") {
+      throw e;
+    }
+  }
+};
+
+export const hashFile = async (path: string) => {
+  const hash = createHash("sha256");
+  for await (const chunk of createReadStream(path)) {
+    hash.update(chunk);
+  }
+  return hash.digest("base64");
+};

src/lib/server/storage/index.ts

@@ -0,0 +1,3 @@
+export * from "./chunks";
+export * from "./files";
+export * from "./streams";

src/lib/server/storage/streams.ts

@@ -0,0 +1,40 @@
+import { createReadStream } from "fs";
+import { stat } from "fs/promises";
+import { Readable } from "stream";
+import { AppError } from "#lib/server/errors.js";
+
+export const createEncContentStream = async (
+  path: string,
+  iv?: Buffer,
+  range?: { start?: number; end?: number },
+) => {
+  const { size: fileSize } = await stat(path);
+  const ivSize = iv?.byteLength ?? 0;
+  const totalSize = fileSize + ivSize;
+
+  const start = range?.start ?? 0;
+  const end = range?.end ?? totalSize - 1;
+  if (start > end || start < 0 || end >= totalSize) {
+    throw new AppError("RANGE_NOT_SATISFIABLE", "Invalid range");
+  }
+
+  return {
+    encContentStream: Readable.toWeb(
+      Readable.from(
+        (async function* () {
+          if (start < ivSize) {
+            yield iv!.subarray(start, Math.min(end + 1, ivSize));
+          }
+          if (end >= ivSize) {
+            yield* createReadStream(path, {
+              start: Math.max(0, start - ivSize),
+              end: end - ivSize,
+            });
+          }
+        })(),
+      ),
+    ),
+    range: { start, end, total: totalSize },
+    isRangeRequest: !!range,
+  };
+};

src/routes/api/file/[id]/[[thumbnail=thumbnail]]/download/+server.ts

@@ -1,11 +1,12 @@
 import { error } from "@sveltejs/kit";
 import { z } from "zod";
 import { parseRangeHeader, getContentRangeHeader } from "#lib/modules/http.js";
-import { authorize } from "#lib/server/modules/auth.js";
-import { getFileStream, getFileThumbnailStream } from "#lib/server/services/file.js";
-import type { RequestHandler, RouteParams } from "./$types";
+import { authorize } from "#lib/server/auth.js";
+import { handleAppErrors } from "#lib/server/http.js";
+import { FileService } from "#lib/server/services/index.js";
+import type { RequestEvent, RequestHandler } from "./$types";
 
-const downloadHandler = async (locals: App.Locals, params: RouteParams, request: Request) => {
+const downloadHandler = async ({ locals, params, request }: RequestEvent) => {
   const { userId } = await authorize(locals, "activeClient");
 
   const zodRes = z
@@ -16,7 +17,9 @@ const downloadHandler = async (locals: App.Locals, params: RouteParams, request:
   if (!zodRes.success) error(400, "Invalid path parameters");
   const { id } = zodRes.data;
 
-  const getStream = params.thumbnail ? getFileThumbnailStream : getFileStream;
+  const getStream = params.thumbnail
+    ? FileService.getFileThumbnailStream
+    : FileService.getFileStream;
   const { encContentStream, range, isRangeRequest } = await getStream(
     userId,
     id,
@@ -34,11 +37,13 @@ const downloadHandler = async (locals: App.Locals, params: RouteParams, request:
   };
 };
 
-export const GET: RequestHandler = async ({ locals, params, request }) => {
-  const { stream, ...init } = await downloadHandler(locals, params, request);
+export const GET: RequestHandler = handleAppErrors(async (event) => {
+  const { stream, ...init } = await downloadHandler(event);
   return new Response(stream as ReadableStream, init);
-};
+});
 
-export const HEAD: RequestHandler = async ({ locals, params, request }) => {
-  return new Response(null, await downloadHandler(locals, params, request));
-};
+export const HEAD: RequestHandler = handleAppErrors(async (event) => {
+  const { stream, ...init } = await downloadHandler(event);
+  await stream.cancel();
+  return new Response(null, init);
+});

src/routes/api/upload/[id]/chunks/[index]/+server.ts

@@ -2,11 +2,12 @@ import { error } from "@sveltejs/kit";
 import { Readable } from "stream";
 import type { ReadableStream } from "stream/web";
 import { z } from "zod";
-import { authorize } from "#lib/server/modules/auth.js";
-import { uploadChunk } from "#lib/server/services/upload.js";
+import { authorize } from "#lib/server/auth.js";
+import { handleAppErrors } from "#lib/server/http.js";
+import { UploadService } from "#lib/server/services/index.js";
 import type { RequestHandler } from "./$types";
 
-export const POST: RequestHandler = async ({ locals, params, request }) => {
+export const POST: RequestHandler = handleAppErrors(async ({ locals, params, request }) => {
   const { userId } = await authorize(locals, "activeClient");
 
   const zodRes = z
@@ -22,11 +23,11 @@ export const POST: RequestHandler = async ({ locals, params, request }) => {
     error(400, "Invalid request body");
   }
 
-  await uploadChunk(
+  await UploadService.uploadChunk(
     userId,
     sessionId,
     chunkIndex,
     Readable.fromWeb(request.body as ReadableStream),
   );
   return new Response("Chunk uploaded", { headers: { "Content-Type": "text/plain" } });
-};
+});

src/trpc/dto.ts

@@ -0,0 +1,48 @@
+import type { Category } from "#lib/server/db/repositories/category.js";
+import type { Directory } from "#lib/server/db/repositories/directory.js";
+import type { File } from "#lib/server/db/repositories/file.js";
+
+// Shapes of filesystem entries exposed by the API
+
+export const toDirectoryDto = (directory: Directory) => ({
+  id: directory.id,
+  parent: directory.parentId,
+  mekVersion: directory.mekVersion,
+  dek: directory.encDek,
+  dekVersion: directory.dekVersion,
+  name: directory.encName.ciphertext,
+  nameIv: directory.encName.iv,
+  isFavorite: directory.isFavorite,
+});
+
+export const toFileDto = (file: File) => ({
+  id: file.id,
+  isLegacy: !!file.encContentIv,
+  parent: file.parentId,
+  mekVersion: file.mekVersion,
+  dek: file.encDek,
+  dekVersion: file.dekVersion,
+  contentType: file.contentType,
+  name: file.encName.ciphertext,
+  nameIv: file.encName.iv,
+  createdAt: file.encCreatedAt?.ciphertext,
+  createdAtIv: file.encCreatedAt?.iv,
+  lastModifiedAt: file.encLastModifiedAt.ciphertext,
+  lastModifiedAtIv: file.encLastModifiedAt.iv,
+  isFavorite: file.isFavorite,
+});
+
+export const toCategoryDto = (category: Category) => ({
+  id: category.id,
+  parent: category.parentId,
+  mekVersion: category.mekVersion,
+  dek: category.encDek,
+  dekVersion: category.dekVersion,
+  name: category.encName.ciphertext,
+  nameIv: category.encName.iv,
+});
+
+export const toFileWithCategoriesDto = (file: File & { categories: Category[] }) => ({
+  ...toFileDto(file),
+  categories: file.categories.map(toCategoryDto),
+});

src/trpc/init.server.ts

@@ -1,14 +1,34 @@
 import type { RequestEvent } from "@sveltejs/kit";
 import { initTRPC, TRPCError } from "@trpc/server";
 import superjson from "superjson";
-import { authorizeMiddleware, authorizeClientMiddleware } from "./middlewares/authorize";
+import { authorize, type ClientSession, type Session } from "#lib/server/auth.js";
+import { AppError, type ErrorCode } from "#lib/server/errors.js";
 
 export const createContext = (event: RequestEvent) => event;
 export type Context = Awaited<ReturnType<typeof createContext>>;
 
 export const t = initTRPC.context<Context>().create({ transformer: superjson });
 export const router = t.router;
-export const publicProcedure = t.procedure;
+
+const trpcErrorCodes = {
+  BAD_REQUEST: "BAD_REQUEST",
+  UNAUTHORIZED: "UNAUTHORIZED",
+  FORBIDDEN: "FORBIDDEN",
+  NOT_FOUND: "NOT_FOUND",
+  CONFLICT: "CONFLICT",
+  RANGE_NOT_SATISFIABLE: "BAD_REQUEST",
+  INTERNAL_SERVER_ERROR: "INTERNAL_SERVER_ERROR",
+} as const satisfies Record<ErrorCode, TRPCError["code"]>;
+
+// Converts `AppError`s thrown by services into tRPC errors
+export const publicProcedure = t.procedure.use(async ({ next }) => {
+  const result = await next();
+  if (!result.ok && result.error.cause instanceof AppError) {
+    const { code, message } = result.error.cause;
+    throw new TRPCError({ code: trpcErrorCodes[code], message, cause: result.error.cause });
+  }
+  return result;
+});
 
 const authedProcedure = publicProcedure.use(async ({ ctx, next }) => {
   if (!ctx.locals.session) {
@@ -17,10 +37,24 @@ const authedProcedure = publicProcedure.use(async ({ ctx, next }) => {
   return next();
 });
 
+const sessionProcedure = (requiredPermission: "any" | "notClient") =>
+  authedProcedure.use(async ({ ctx, next }) => {
+    const session: Session = await authorize(ctx.locals, requiredPermission);
+    return next({ ctx: { session } });
+  });
+
+const clientSessionProcedure = (
+  requiredPermission: "anyClient" | "pendingClient" | "activeClient",
+) =>
+  authedProcedure.use(async ({ ctx, next }) => {
+    const session: ClientSession = await authorize(ctx.locals, requiredPermission);
+    return next({ ctx: { session } });
+  });
+
 export const roleProcedure = {
-  any: authedProcedure.use(authorizeMiddleware("any")),
-  notClient: authedProcedure.use(authorizeMiddleware("notClient")),
-  anyClient: authedProcedure.use(authorizeClientMiddleware("anyClient")),
-  pendingClient: authedProcedure.use(authorizeClientMiddleware("pendingClient")),
-  activeClient: authedProcedure.use(authorizeClientMiddleware("activeClient")),
+  any: sessionProcedure("any"),
+  notClient: sessionProcedure("notClient"),
+  anyClient: clientSessionProcedure("anyClient"),
+  pendingClient: clientSessionProcedure("pendingClient"),
+  activeClient: clientSessionProcedure("activeClient"),
 };

src/trpc/middlewares/authorize.ts

@@ -1,36 +0,0 @@
-import { TRPCError } from "@trpc/server";
-import {
-  AuthorizationError,
-  authorizeInternal,
-  type ClientSession,
-  type SessionPermission,
-} from "#lib/server/modules/auth.js";
-import { t } from "../init.server";
-
-const authorize = async (locals: App.Locals, requiredPermission: SessionPermission) => {
-  try {
-    return await authorizeInternal(locals, requiredPermission);
-  } catch (e) {
-    if (e instanceof AuthorizationError) {
-      throw new TRPCError({
-        code: e.status === 403 ? "FORBIDDEN" : "INTERNAL_SERVER_ERROR",
-        message: e.message,
-      });
-    }
-    throw e;
-  }
-};
-
-export const authorizeMiddleware = (requiredPermission: "any" | "notClient") =>
-  t.middleware(async ({ ctx, next }) => {
-    const session = await authorize(ctx.locals, requiredPermission);
-    return next({ ctx: { session } });
-  });
-
-export const authorizeClientMiddleware = (
-  requiredPermission: "anyClient" | "pendingClient" | "activeClient",
-) =>
-  t.middleware(async ({ ctx, next }) => {
-    const session = (await authorize(ctx.locals, requiredPermission)) as ClientSession;
-    return next({ ctx: { session } });
-  });

src/trpc/routers/auth.ts

@@ -1,11 +1,8 @@
-import { TRPCError } from "@trpc/server";
-import argon2 from "argon2";
 import { z } from "zod";
-import { ClientRepo, SessionRepo, UserRepo, IntegrityError } from "#lib/server/db/index.js";
-import env from "#lib/server/loadenv.js";
-import { cookieOptions } from "#lib/server/modules/auth.js";
-import { generateChallenge, verifySignature, issueSessionId } from "#lib/server/modules/crypto.js";
-import { router, publicProcedure, roleProcedure } from "../init.server";
+import { cookieOptions } from "#lib/server/auth.js";
+import { AuthService } from "#lib/server/services/index.js";
+import { router, publicProcedure, roleProcedure } from "#trpc/init.server.js";
+import { Base64Schema, IdSchema } from "#trpc/schemas.js";
 
 const authRouter = router({
   login: publicProcedure
@@ -16,18 +13,17 @@ const authRouter = router({
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const user = await UserRepo.getUserByEmail(input.email);
-      if (!user || !(await argon2.verify(user.password, input.password))) {
-        throw new TRPCError({ code: "UNAUTHORIZED", message: "Invalid email or password" });
-      }
-
-      const { sessionId, sessionIdSigned } = await issueSessionId(32, env.session.secret);
-      await SessionRepo.createSession(user.id, sessionId, ctx.locals.ip, ctx.locals.userAgent);
+      const { sessionIdSigned } = await AuthService.login(
+        input.email,
+        input.password,
+        ctx.locals.ip,
+        ctx.locals.userAgent,
+      );
       ctx.cookies.set("sessionId", sessionIdSigned, cookieOptions);
     }),
 
   logout: roleProcedure["any"].mutation(async ({ ctx }) => {
-    await SessionRepo.deleteSession(ctx.session.sessionId);
+    await AuthService.logout(ctx.session.sessionId);
     ctx.cookies.delete("sessionId", cookieOptions);
   }),
 
@@ -39,103 +35,48 @@ const authRouter = router({
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      if (input.oldPassword === input.newPassword) {
-        throw new TRPCError({ code: "BAD_REQUEST", message: "Same passwords" });
-      } else if (input.newPassword.length < 8) {
-        throw new TRPCError({ code: "BAD_REQUEST", message: "Too short password" });
-      }
-
-      const user = await UserRepo.getUser(ctx.session.userId);
-      if (!user) {
-        throw new TRPCError({ code: "INTERNAL_SERVER_ERROR", message: "Invalid session id" });
-      } else if (!(await argon2.verify(user.password, input.oldPassword))) {
-        throw new TRPCError({ code: "FORBIDDEN", message: "Invalid password" });
-      }
-
-      await UserRepo.setUserPassword(ctx.session.userId, await argon2.hash(input.newPassword));
-      await SessionRepo.deleteAllOtherSessions(ctx.session.userId, ctx.session.sessionId);
+      await AuthService.changePassword(
+        ctx.session.userId,
+        ctx.session.sessionId,
+        input.oldPassword,
+        input.newPassword,
+      );
     }),
 
   upgrade: roleProcedure["notClient"]
     .input(
       z.object({
-        encPubKey: z.base64().nonempty(),
-        sigPubKey: z.base64().nonempty(),
+        encPubKey: Base64Schema,
+        sigPubKey: Base64Schema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const client = await ClientRepo.getClientByPubKeys(input.encPubKey, input.sigPubKey);
-      const userClient = client
-        ? await ClientRepo.getUserClient(ctx.session.userId, client.id)
-        : undefined;
-      if (!client) {
-        throw new TRPCError({ code: "UNAUTHORIZED", message: "Invalid public key(s)" });
-      } else if (!userClient || userClient.state === "challenging") {
-        throw new TRPCError({ code: "FORBIDDEN", message: "Unregistered client" });
-      }
-
-      const { answer, challenge } = await generateChallenge(32, input.encPubKey);
-      const { id } = await SessionRepo.registerSessionUpgradeChallenge(
+      return await AuthService.requestSessionUpgrade(
+        ctx.session.userId,
         ctx.session.sessionId,
-        client.id,
-        answer.toString("base64"),
         ctx.locals.ip,
-        new Date(Date.now() + env.challenge.sessionUpgradeExp),
+        input.encPubKey,
+        input.sigPubKey,
       );
-
-      return { id, challenge: challenge.toString("base64") };
     }),
 
   verifyUpgrade: roleProcedure["notClient"]
     .input(
       z.object({
-        id: z.int().positive(),
-        answerSig: z.base64().nonempty(),
+        id: IdSchema,
+        answerSig: Base64Schema,
         force: z.boolean().default(false),
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const challenge = await SessionRepo.consumeSessionUpgradeChallenge(
-        input.id,
+      await AuthService.verifySessionUpgrade(
+        ctx.session.userId,
         ctx.session.sessionId,
         ctx.locals.ip,
+        input.id,
+        input.answerSig,
+        input.force,
       );
-      if (!challenge) {
-        throw new TRPCError({ code: "FORBIDDEN", message: "Invalid challenge answer" });
-      }
-
-      const client = await ClientRepo.getClient(challenge.clientId);
-      if (!client) {
-        throw new TRPCError({ code: "INTERNAL_SERVER_ERROR", message: "Invalid challenge answer" });
-      } else if (
-        !verifySignature(Buffer.from(challenge.answer, "base64"), input.answerSig, client.sigPubKey)
-      ) {
-        throw new TRPCError({
-          code: "FORBIDDEN",
-          message: "Invalid challenge answer signature",
-        });
-      }
-
-      try {
-        await SessionRepo.upgradeSession(
-          ctx.session.userId,
-          ctx.session.sessionId,
-          client.id,
-          input.force,
-        );
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "Session not found") {
-            throw new TRPCError({
-              code: "INTERNAL_SERVER_ERROR",
-              message: "Invalid challenge answer",
-            });
-          } else if (!input.force && e.message === "Session already exists") {
-            throw new TRPCError({ code: "CONFLICT", message: "Already logged in" });
-          }
-        }
-        throw e;
-      }
     }),
 });
 

src/trpc/routers/category.ts

@@ -1,8 +1,14 @@
-import { TRPCError } from "@trpc/server";
 import { z } from "zod";
-import { CategoryIdSchema } from "#lib/schemas/index.js";
-import { CategoryRepo, FileRepo, IntegrityError } from "#lib/server/db/index.js";
-import { router, roleProcedure } from "../init.server";
+import { CategoryService } from "#lib/server/services/index.js";
+import { toCategoryDto, toFileDto } from "#trpc/dto.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import {
+  Base64Schema,
+  CategoryIdSchema,
+  EncryptedNameSchema,
+  IdSchema,
+  toCiphertext,
+} from "#trpc/schemas.js";
 
 const categoryRouter = router({
   get: roleProcedure["activeClient"]
@@ -13,53 +19,15 @@ const categoryRouter = router({
       }),
     )
     .query(async ({ ctx, input }) => {
-      const category =
-        input.id !== "root"
-          ? await CategoryRepo.getCategory(ctx.session.userId, input.id)
-          : undefined;
-      if (category === null) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid category id" });
-      }
-
-      const [categories, files] = await Promise.all([
-        CategoryRepo.getAllCategoriesByParent(ctx.session.userId, input.id),
-        input.id !== "root"
-          ? FileRepo.getAllFilesByCategory(ctx.session.userId, input.id, input.recurse)
-          : undefined,
-      ]);
+      const { category, subCategories, files } = await CategoryService.getCategory(
+        ctx.session.userId,
+        input.id,
+        input.recurse,
+      );
       return {
-        metadata: category && {
-          parent: category.parentId,
-          mekVersion: category.mekVersion,
-          dek: category.encDek,
-          dekVersion: category.dekVersion,
-          name: category.encName.ciphertext,
-          nameIv: category.encName.iv,
-        },
-        subCategories: categories.map((category) => ({
-          id: category.id,
-          mekVersion: category.mekVersion,
-          dek: category.encDek,
-          dekVersion: category.dekVersion,
-          name: category.encName.ciphertext,
-          nameIv: category.encName.iv,
-        })),
-        files: files?.map((file) => ({
-          id: file.id,
-          parent: file.parentId,
-          mekVersion: file.mekVersion,
-          dek: file.encDek,
-          dekVersion: file.dekVersion,
-          contentType: file.contentType,
-          name: file.encName.ciphertext,
-          nameIv: file.encName.iv,
-          createdAt: file.encCreatedAt?.ciphertext,
-          createdAtIv: file.encCreatedAt?.iv,
-          lastModifiedAt: file.encLastModifiedAt.ciphertext,
-          lastModifiedAtIv: file.encLastModifiedAt.iv,
-          isFavorite: file.isFavorite,
-          isRecursive: file.isRecursive,
-        })),
+        metadata: category && toCategoryDto(category),
+        subCategories: subCategories.map(toCategoryDto),
+        files: files?.map((file) => ({ ...toFileDto(file), isRecursive: file.isRecursive })),
       };
     }),
 
@@ -67,139 +35,70 @@ const categoryRouter = router({
     .input(
       z.object({
         parent: CategoryIdSchema,
-        mekVersion: z.int().positive(),
-        dek: z.base64().nonempty(),
+        mekVersion: IdSchema,
+        dek: Base64Schema,
         dekVersion: z.date(),
-        name: z.base64().nonempty(),
-        nameIv: z.base64().nonempty(),
+        ...EncryptedNameSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const oneMinuteAgo = new Date(Date.now() - 60 * 1000);
-      const oneMinuteLater = new Date(Date.now() + 60 * 1000);
-      if (input.dekVersion <= oneMinuteAgo || input.dekVersion >= oneMinuteLater) {
-        throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid DEK version" });
-      }
-
-      try {
-        await CategoryRepo.registerCategory({
-          parentId: input.parent,
-          userId: ctx.session.userId,
-          mekVersion: input.mekVersion,
-          encDek: input.dek,
-          dekVersion: input.dekVersion,
-          encName: { ciphertext: input.name, iv: input.nameIv },
-        });
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "Inactive MEK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          } else if (e.message === "Category not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid parent category id" });
-          }
-        }
-        throw e;
-      }
+      await CategoryService.createCategory({
+        userId: ctx.session.userId,
+        parentId: input.parent,
+        mekVersion: input.mekVersion,
+        encDek: input.dek,
+        dekVersion: input.dekVersion,
+        encName: toCiphertext(input.name, input.nameIv),
+      });
     }),
 
   rename: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
         dekVersion: z.date(),
-        name: z.base64().nonempty(),
-        nameIv: z.base64().nonempty(),
+        ...EncryptedNameSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      try {
-        await CategoryRepo.setCategoryEncName(ctx.session.userId, input.id, input.dekVersion, {
-          ciphertext: input.name,
-          iv: input.nameIv,
-        });
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "Category not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid category id" });
-          } else if (e.message === "Invalid DEK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
+      await CategoryService.renameCategory(
+        ctx.session.userId,
+        input.id,
+        input.dekVersion,
+        toCiphertext(input.name, input.nameIv),
+      );
     }),
 
   delete: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      try {
-        await CategoryRepo.unregisterCategory(ctx.session.userId, input.id);
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "Category not found") {
-          throw new TRPCError({ code: "NOT_FOUND", message: "Invalid category id" });
-        }
-        throw e;
-      }
+      await CategoryService.deleteCategory(ctx.session.userId, input.id);
     }),
 
   addFile: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
-        file: z.int().positive(),
+        id: IdSchema,
+        file: IdSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const [category, file] = await Promise.all([
-        CategoryRepo.getCategory(ctx.session.userId, input.id),
-        FileRepo.getFile(ctx.session.userId, input.file),
-      ]);
-      if (!category) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid category id" });
-      } else if (!file) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-      }
-
-      try {
-        await FileRepo.addFileToCategory(input.file, input.id);
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "File already added to category") {
-          throw new TRPCError({ code: "BAD_REQUEST", message: "File already added" });
-        }
-        throw e;
-      }
+      await CategoryService.addFileToCategory(ctx.session.userId, input.id, input.file);
     }),
 
   removeFile: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
-        file: z.int().positive(),
+        id: IdSchema,
+        file: IdSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const [category, file] = await Promise.all([
-        CategoryRepo.getCategory(ctx.session.userId, input.id),
-        FileRepo.getFile(ctx.session.userId, input.file),
-      ]);
-      if (!category) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid category id" });
-      } else if (!file) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-      }
-
-      try {
-        await FileRepo.removeFileFromCategory(input.file, input.id);
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "File not found in category") {
-          throw new TRPCError({ code: "BAD_REQUEST", message: "File not added" });
-        }
-        throw e;
-      }
+      await CategoryService.removeFileFromCategory(ctx.session.userId, input.id, input.file);
     }),
 });
 

src/trpc/routers/client.ts

@@ -1,96 +1,39 @@
-import { TRPCError } from "@trpc/server";
 import { z } from "zod";
-import { ClientRepo, IntegrityError } from "#lib/server/db/index.js";
-import env from "#lib/server/loadenv.js";
-import { verifyPubKey, verifySignature, generateChallenge } from "#lib/server/modules/crypto.js";
-import { router, roleProcedure } from "../init.server";
-
-const createUserClientChallenge = async (
-  ip: string,
-  userId: number,
-  clientId: number,
-  encPubKey: string,
-) => {
-  const { answer, challenge } = await generateChallenge(32, encPubKey);
-  const { id } = await ClientRepo.registerUserClientChallenge(
-    userId,
-    clientId,
-    answer.toString("base64"),
-    ip,
-    new Date(Date.now() + env.challenge.userClientExp),
-  );
-
-  return { id, challenge: challenge.toString("base64") };
-};
+import { ClientService } from "#lib/server/services/index.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import { Base64Schema, IdSchema } from "#trpc/schemas.js";
 
 const clientRouter = router({
   register: roleProcedure["notClient"]
     .input(
       z.object({
-        encPubKey: z.base64().nonempty(),
-        sigPubKey: z.base64().nonempty(),
+        encPubKey: Base64Schema,
+        sigPubKey: Base64Schema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const { userId } = ctx.session;
-      const { encPubKey, sigPubKey } = input;
-      const client = await ClientRepo.getClientByPubKeys(encPubKey, sigPubKey);
-      if (client) {
-        try {
-          await ClientRepo.createUserClient(userId, client.id);
-          return await createUserClientChallenge(ctx.locals.ip, userId, client.id, encPubKey);
-        } catch (e) {
-          if (e instanceof IntegrityError && e.message === "User client already exists") {
-            throw new TRPCError({ code: "CONFLICT", message: "Client already registered" });
-          }
-          throw e;
-        }
-      } else {
-        if (encPubKey === sigPubKey) {
-          throw new TRPCError({ code: "BAD_REQUEST", message: "Same public keys" });
-        } else if (!verifyPubKey(encPubKey) || !verifyPubKey(sigPubKey)) {
-          throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid public key(s)" });
-        }
-
-        try {
-          const { id: clientId } = await ClientRepo.createClient(encPubKey, sigPubKey, userId);
-          return await createUserClientChallenge(ctx.locals.ip, userId, clientId, encPubKey);
-        } catch (e) {
-          if (e instanceof IntegrityError && e.message === "Public key(s) already registered") {
-            throw new TRPCError({ code: "CONFLICT", message: "Public key(s) already used" });
-          }
-          throw e;
-        }
-      }
+      return await ClientService.registerClient(
+        ctx.session.userId,
+        ctx.locals.ip,
+        input.encPubKey,
+        input.sigPubKey,
+      );
     }),
 
   verify: roleProcedure["notClient"]
     .input(
       z.object({
-        id: z.int().positive(),
-        answerSig: z.base64().nonempty(),
+        id: IdSchema,
+        answerSig: Base64Schema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const challenge = await ClientRepo.consumeUserClientChallenge(
-        input.id,
+      await ClientService.verifyClient(
         ctx.session.userId,
         ctx.locals.ip,
+        input.id,
+        input.answerSig,
       );
-      if (!challenge) {
-        throw new TRPCError({ code: "FORBIDDEN", message: "Invalid challenge answer" });
-      }
-
-      const client = await ClientRepo.getClient(challenge.clientId);
-      if (!client) {
-        throw new TRPCError({ code: "INTERNAL_SERVER_ERROR", message: "Invalid challenge answer" });
-      } else if (
-        !verifySignature(Buffer.from(challenge.answer, "base64"), input.answerSig, client.sigPubKey)
-      ) {
-        throw new TRPCError({ code: "FORBIDDEN", message: "Invalid challenge answer signature" });
-      }
-
-      await ClientRepo.setUserClientStateToPending(ctx.session.userId, client.id);
     }),
 });
 

src/trpc/routers/directory.ts

@@ -1,9 +1,14 @@
-import { TRPCError } from "@trpc/server";
 import { z } from "zod";
-import { DirectoryIdSchema } from "#lib/schemas/index.js";
-import { DirectoryRepo, FileRepo, IntegrityError } from "#lib/server/db/index.js";
-import { safeUnlink } from "#lib/server/modules/filesystem.js";
-import { router, roleProcedure } from "../init.server";
+import { DirectoryService } from "#lib/server/services/index.js";
+import { toDirectoryDto, toFileDto } from "#trpc/dto.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import {
+  Base64Schema,
+  DirectoryIdSchema,
+  EncryptedNameSchema,
+  IdSchema,
+  toCiphertext,
+} from "#trpc/schemas.js";
 
 const directoryRouter = router({
   get: roleProcedure["activeClient"]
@@ -13,51 +18,14 @@ const directoryRouter = router({
       }),
     )
     .query(async ({ ctx, input }) => {
-      const directory =
-        input.id !== "root"
-          ? await DirectoryRepo.getDirectory(ctx.session.userId, input.id)
-          : undefined;
-      if (directory === null) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid directory id" });
-      }
-
-      const [directories, files] = await Promise.all([
-        DirectoryRepo.getAllDirectoriesByParent(ctx.session.userId, input.id),
-        FileRepo.getAllFilesByParent(ctx.session.userId, input.id),
-      ]);
+      const { directory, subDirectories, files } = await DirectoryService.getDirectory(
+        ctx.session.userId,
+        input.id,
+      );
       return {
-        metadata: directory && {
-          parent: directory.parentId,
-          mekVersion: directory.mekVersion,
-          dek: directory.encDek,
-          dekVersion: directory.dekVersion,
-          name: directory.encName.ciphertext,
-          nameIv: directory.encName.iv,
-          isFavorite: directory.isFavorite,
-        },
-        subDirectories: directories.map((directory) => ({
-          id: directory.id,
-          mekVersion: directory.mekVersion,
-          dek: directory.encDek,
-          dekVersion: directory.dekVersion,
-          name: directory.encName.ciphertext,
-          nameIv: directory.encName.iv,
-          isFavorite: directory.isFavorite,
-        })),
-        files: files.map((file) => ({
-          id: file.id,
-          mekVersion: file.mekVersion,
-          dek: file.encDek,
-          dekVersion: file.dekVersion,
-          contentType: file.contentType,
-          name: file.encName.ciphertext,
-          nameIv: file.encName.iv,
-          createdAt: file.encCreatedAt?.ciphertext,
-          createdAtIv: file.encCreatedAt?.iv,
-          lastModifiedAt: file.encLastModifiedAt.ciphertext,
-          lastModifiedAtIv: file.encLastModifiedAt.iv,
-          isFavorite: file.isFavorite,
-        })),
+        metadata: directory && toDirectoryDto(directory),
+        subDirectories: subDirectories.map(toDirectoryDto),
+        files: files.map(toFileDto),
       };
     }),
 
@@ -65,90 +33,52 @@ const directoryRouter = router({
     .input(
       z.object({
         parent: DirectoryIdSchema,
-        mekVersion: z.int().positive(),
-        dek: z.base64().nonempty(),
+        mekVersion: IdSchema,
+        dek: Base64Schema,
         dekVersion: z.date(),
-        name: z.base64().nonempty(),
-        nameIv: z.base64().nonempty(),
+        ...EncryptedNameSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const oneMinuteAgo = new Date(Date.now() - 60 * 1000);
-      const oneMinuteLater = new Date(Date.now() + 60 * 1000);
-      if (input.dekVersion <= oneMinuteAgo || input.dekVersion >= oneMinuteLater) {
-        throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid DEK version" });
-      }
-
-      try {
-        await DirectoryRepo.registerDirectory({
-          parentId: input.parent,
-          userId: ctx.session.userId,
-          mekVersion: input.mekVersion,
-          encDek: input.dek,
-          dekVersion: input.dekVersion,
-          encName: { ciphertext: input.name, iv: input.nameIv },
-        });
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "Inactive MEK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          } else if (e.message === "Directory not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid parent directory id" });
-          }
-        }
-        throw e;
-      }
+      await DirectoryService.createDirectory({
+        userId: ctx.session.userId,
+        parentId: input.parent,
+        mekVersion: input.mekVersion,
+        encDek: input.dek,
+        dekVersion: input.dekVersion,
+        encName: toCiphertext(input.name, input.nameIv),
+      });
     }),
 
   rename: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
         dekVersion: z.date(),
-        name: z.base64().nonempty(),
-        nameIv: z.base64().nonempty(),
+        ...EncryptedNameSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      try {
-        await DirectoryRepo.setDirectoryEncName(ctx.session.userId, input.id, input.dekVersion, {
-          ciphertext: input.name,
-          iv: input.nameIv,
-        });
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "Directory not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid directory id" });
-          } else if (e.message === "Invalid DEK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
+      await DirectoryService.renameDirectory(
+        ctx.session.userId,
+        input.id,
+        input.dekVersion,
+        toCiphertext(input.name, input.nameIv),
+      );
     }),
 
   delete: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      try {
-        const files = await DirectoryRepo.unregisterDirectory(ctx.session.userId, input.id);
-        return {
-          deletedFiles: files.map((file) => {
-            safeUnlink(file.path); // Intended
-            safeUnlink(file.thumbnailPath); // Intended
-            return file.id;
-          }),
-        };
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "Directory not found") {
-          throw new TRPCError({ code: "NOT_FOUND", message: "Invalid directory id" });
-        }
-        throw e;
-      }
+      const { deletedFileIds } = await DirectoryService.deleteDirectory(
+        ctx.session.userId,
+        input.id,
+      );
+      return { deletedFiles: deletedFileIds };
     }),
 });
 

src/trpc/routers/favorites.ts

@@ -1,123 +1,43 @@
-import { TRPCError } from "@trpc/server";
 import { z } from "zod";
-import { DirectoryRepo, FileRepo, IntegrityError } from "#lib/server/db/index.js";
-import { router, roleProcedure } from "../init.server";
+import { DirectoryService, FileService } from "#lib/server/services/index.js";
+import { toDirectoryDto, toFileDto } from "#trpc/dto.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import { IdSchema } from "#trpc/schemas.js";
+
+const IdInputSchema = z.object({ id: IdSchema });
 
 const favoritesRouter = router({
   get: roleProcedure["activeClient"].query(async ({ ctx }) => {
     const [directories, files] = await Promise.all([
-      DirectoryRepo.getAllFavoriteDirectories(ctx.session.userId),
-      FileRepo.getAllFavoriteFiles(ctx.session.userId),
+      DirectoryService.getFavoriteDirectories(ctx.session.userId),
+      FileService.getFavoriteFiles(ctx.session.userId),
     ]);
     return {
-      directories: directories.map((directory) => ({
-        id: directory.id,
-        parent: directory.parentId,
-        mekVersion: directory.mekVersion,
-        dek: directory.encDek,
-        dekVersion: directory.dekVersion,
-        name: directory.encName.ciphertext,
-        nameIv: directory.encName.iv,
-      })),
-      files: files.map((file) => ({
-        id: file.id,
-        parent: file.parentId,
-        mekVersion: file.mekVersion,
-        dek: file.encDek,
-        dekVersion: file.dekVersion,
-        contentType: file.contentType,
-        name: file.encName.ciphertext,
-        nameIv: file.encName.iv,
-        createdAt: file.encCreatedAt?.ciphertext,
-        createdAtIv: file.encCreatedAt?.iv,
-        lastModifiedAt: file.encLastModifiedAt.ciphertext,
-        lastModifiedAtIv: file.encLastModifiedAt.iv,
-      })),
+      directories: directories.map(toDirectoryDto),
+      files: files.map(toFileDto),
     };
   }),
 
   addDirectory: roleProcedure["activeClient"]
-    .input(
-      z.object({
-        id: z.int().positive(),
-      }),
-    )
+    .input(IdInputSchema)
     .mutation(async ({ ctx, input }) => {
-      try {
-        await DirectoryRepo.setDirectoryFavorite(ctx.session.userId, input.id, true);
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "Directory not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid directory id" });
-          } else if (e.message === "Directory already favorited") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
+      await DirectoryService.setDirectoryFavorite(ctx.session.userId, input.id, true);
     }),
 
   removeDirectory: roleProcedure["activeClient"]
-    .input(
-      z.object({
-        id: z.int().positive(),
-      }),
-    )
+    .input(IdInputSchema)
     .mutation(async ({ ctx, input }) => {
-      try {
-        await DirectoryRepo.setDirectoryFavorite(ctx.session.userId, input.id, false);
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "Directory not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid directory id" });
-          } else if (e.message === "Directory not favorited") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
+      await DirectoryService.setDirectoryFavorite(ctx.session.userId, input.id, false);
     }),
 
-  addFile: roleProcedure["activeClient"]
-    .input(
-      z.object({
-        id: z.int().positive(),
-      }),
-    )
-    .mutation(async ({ ctx, input }) => {
-      try {
-        await FileRepo.setFileFavorite(ctx.session.userId, input.id, true);
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "File not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-          } else if (e.message === "File already favorited") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
-    }),
+  addFile: roleProcedure["activeClient"].input(IdInputSchema).mutation(async ({ ctx, input }) => {
+    await FileService.setFileFavorite(ctx.session.userId, input.id, true);
+  }),
 
   removeFile: roleProcedure["activeClient"]
-    .input(
-      z.object({
-        id: z.int().positive(),
-      }),
-    )
+    .input(IdInputSchema)
     .mutation(async ({ ctx, input }) => {
-      try {
-        await FileRepo.setFileFavorite(ctx.session.userId, input.id, false);
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "File not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-          } else if (e.message === "File not favorited") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
+      await FileService.setFileFavorite(ctx.session.userId, input.id, false);
     }),
 });
 

src/trpc/routers/file.ts

@@ -1,97 +1,44 @@
-import { TRPCError } from "@trpc/server";
 import { z } from "zod";
-import { FileRepo, MediaRepo, IntegrityError } from "#lib/server/db/index.js";
-import { safeUnlink } from "#lib/server/modules/filesystem.js";
-import { router, roleProcedure } from "../init.server";
+import { FileService } from "#lib/server/services/index.js";
+import { toFileDto, toFileWithCategoriesDto } from "#trpc/dto.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import { Base64Schema, EncryptedNameSchema, IdSchema, toCiphertext } from "#trpc/schemas.js";
 
 const fileRouter = router({
   get: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
       }),
     )
     .query(async ({ ctx, input }) => {
-      const file = await FileRepo.getFile(ctx.session.userId, input.id);
-      if (!file) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-      }
-
-      const categories = await FileRepo.getAllFileCategories(input.id);
-      return {
-        isLegacy: !!file.encContentIv,
-        parent: file.parentId,
-        mekVersion: file.mekVersion,
-        dek: file.encDek,
-        dekVersion: file.dekVersion,
-        contentType: file.contentType,
-        name: file.encName.ciphertext,
-        nameIv: file.encName.iv,
-        createdAt: file.encCreatedAt?.ciphertext,
-        createdAtIv: file.encCreatedAt?.iv,
-        lastModifiedAt: file.encLastModifiedAt.ciphertext,
-        lastModifiedAtIv: file.encLastModifiedAt.iv,
-        isFavorite: file.isFavorite,
-        categories: categories.map((category) => ({
-          id: category.id,
-          parent: category.parentId,
-          mekVersion: category.mekVersion,
-          dek: category.encDek,
-          dekVersion: category.dekVersion,
-          name: category.encName.ciphertext,
-          nameIv: category.encName.iv,
-        })),
-      };
+      return toFileWithCategoriesDto(await FileService.getFile(ctx.session.userId, input.id));
     }),
 
   bulkGet: roleProcedure["activeClient"]
     .input(
       z.object({
-        ids: z.number().positive().array(),
+        ids: IdSchema.array(),
       }),
     )
     .query(async ({ ctx, input }) => {
-      const files = await FileRepo.getFilesWithCategories(ctx.session.userId, input.ids);
-      return files.map((file) => ({
-        id: file.id,
-        isLegacy: !!file.encContentIv,
-        parent: file.parentId,
-        mekVersion: file.mekVersion,
-        dek: file.encDek,
-        dekVersion: file.dekVersion,
-        contentType: file.contentType,
-        name: file.encName.ciphertext,
-        nameIv: file.encName.iv,
-        createdAt: file.encCreatedAt?.ciphertext,
-        createdAtIv: file.encCreatedAt?.iv,
-        lastModifiedAt: file.encLastModifiedAt.ciphertext,
-        lastModifiedAtIv: file.encLastModifiedAt.iv,
-        isFavorite: file.isFavorite,
-        categories: file.categories.map((category) => ({
-          id: category.id,
-          parent: category.parentId,
-          mekVersion: category.mekVersion,
-          dek: category.encDek,
-          dekVersion: category.dekVersion,
-          name: category.encName.ciphertext,
-          nameIv: category.encName.iv,
-        })),
-      }));
+      const files = await FileService.getFiles(ctx.session.userId, input.ids);
+      return files.map(toFileWithCategoriesDto);
     }),
 
   list: roleProcedure["activeClient"].query(async ({ ctx }) => {
-    return await FileRepo.getAllFileIds(ctx.session.userId);
+    return await FileService.getAllFileIds(ctx.session.userId);
   }),
 
   listByHash: roleProcedure["activeClient"]
     .input(
       z.object({
-        hskVersion: z.int().positive(),
-        contentHmac: z.base64().nonempty(),
+        hskVersion: IdSchema,
+        contentHmac: Base64Schema,
       }),
     )
     .query(async ({ ctx, input }) => {
-      return await FileRepo.getAllFileIdsByContentHmac(
+      return await FileService.getFileIdsByContentHmac(
         ctx.session.userId,
         input.hskVersion,
         input.contentHmac,
@@ -99,84 +46,46 @@ const fileRouter = router({
     }),
 
   listWithoutThumbnail: roleProcedure["activeClient"].query(async ({ ctx }) => {
-    const files = await FileRepo.getFilesWithoutThumbnail(ctx.session.userId);
-    return files.map((file) => ({
-      id: file.id,
-      isLegacy: !!file.encContentIv,
-      parent: file.parentId,
-      mekVersion: file.mekVersion,
-      dek: file.encDek,
-      dekVersion: file.dekVersion,
-      contentType: file.contentType,
-      name: file.encName.ciphertext,
-      nameIv: file.encName.iv,
-      createdAt: file.encCreatedAt?.ciphertext,
-      createdAtIv: file.encCreatedAt?.iv,
-      lastModifiedAt: file.encLastModifiedAt.ciphertext,
-      lastModifiedAtIv: file.encLastModifiedAt.iv,
-      isFavorite: file.isFavorite,
-    }));
+    const files = await FileService.getFilesWithoutThumbnail(ctx.session.userId);
+    return files.map(toFileDto);
   }),
 
   rename: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
         dekVersion: z.date(),
-        name: z.base64().nonempty(),
-        nameIv: z.base64().nonempty(),
+        ...EncryptedNameSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      try {
-        await FileRepo.setFileEncName(ctx.session.userId, input.id, input.dekVersion, {
-          ciphertext: input.name,
-          iv: input.nameIv,
-        });
-      } catch (e) {
-        if (e instanceof IntegrityError) {
-          if (e.message === "File not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-          } else if (e.message === "Invalid DEK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
+      await FileService.renameFile(
+        ctx.session.userId,
+        input.id,
+        input.dekVersion,
+        toCiphertext(input.name, input.nameIv),
+      );
     }),
 
   delete: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      try {
-        const { path, thumbnailPath } = await FileRepo.unregisterFile(ctx.session.userId, input.id);
-        safeUnlink(path); // Intended
-        safeUnlink(thumbnailPath); // Intended
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "File not found") {
-          throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-        }
-        throw e;
-      }
+      await FileService.deleteFile(ctx.session.userId, input.id);
     }),
 
   thumbnail: roleProcedure["activeClient"]
     .input(
       z.object({
-        id: z.int().positive(),
+        id: IdSchema,
       }),
     )
     .query(async ({ ctx, input }) => {
-      const thumbnail = await MediaRepo.getFileThumbnail(ctx.session.userId, input.id);
-      if (!thumbnail) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "File or its thumbnail not found" });
-      }
-
-      return { updatedAt: thumbnail.updatedAt };
+      const { updatedAt } = await FileService.getFileThumbnail(ctx.session.userId, input.id);
+      return { updatedAt };
     }),
 });
 

src/trpc/routers/hsk.ts

@@ -1,11 +1,11 @@
-import { TRPCError } from "@trpc/server";
 import { z } from "zod";
-import { HskRepo, IntegrityError } from "#lib/server/db/index.js";
-import { router, roleProcedure } from "../init.server";
+import { KeyService } from "#lib/server/services/index.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import { Base64Schema, IdSchema } from "#trpc/schemas.js";
 
 const hskRouter = router({
   list: roleProcedure["activeClient"].query(async ({ ctx }) => {
-    const hsks = await HskRepo.getAllValidHsks(ctx.session.userId);
+    const hsks = await KeyService.getHsks(ctx.session.userId);
     return hsks.map(({ version, state, mekVersion, encHsk }) => ({
       version,
       state,
@@ -17,24 +17,17 @@ const hskRouter = router({
   registerInitial: roleProcedure["activeClient"]
     .input(
       z.object({
-        mekVersion: z.int().positive(),
-        hsk: z.base64().nonempty(),
+        mekVersion: IdSchema,
+        hsk: Base64Schema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      try {
-        await HskRepo.registerInitialHsk(
-          ctx.session.userId,
-          ctx.session.clientId,
-          input.mekVersion,
-          input.hsk,
-        );
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "HSK already registered") {
-          throw new TRPCError({ code: "CONFLICT", message: "Initial HSK already registered" });
-        }
-        throw e;
-      }
+      await KeyService.registerInitialHsk(
+        ctx.session.userId,
+        ctx.session.clientId,
+        input.mekVersion,
+        input.hsk,
+      );
     }),
 });
 

src/trpc/routers/mek.ts

@@ -1,31 +1,11 @@
-import { TRPCError } from "@trpc/server";
 import { z } from "zod";
-import { ClientRepo, MekRepo, IntegrityError } from "#lib/server/db/index.js";
-import { verifySignature } from "#lib/server/modules/crypto.js";
-import { router, roleProcedure } from "../init.server";
-
-const verifyClientEncMekSig = async (
-  userId: number,
-  clientId: number,
-  version: number,
-  encMek: string,
-  encMekSig: string,
-) => {
-  const userClient = await ClientRepo.getUserClientWithDetails(userId, clientId);
-  if (!userClient) {
-    throw new TRPCError({ code: "INTERNAL_SERVER_ERROR", message: "Invalid session id" });
-  }
-
-  const data = JSON.stringify({ version, key: encMek });
-  return verifySignature(Buffer.from(data), encMekSig, userClient.sigPubKey);
-};
+import { KeyService } from "#lib/server/services/index.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import { Base64Schema } from "#trpc/schemas.js";
 
 const mekRouter = router({
   list: roleProcedure["activeClient"].query(async ({ ctx }) => {
-    const clientMeks = await MekRepo.getAllValidClientMeks(
-      ctx.session.userId,
-      ctx.session.clientId,
-    );
+    const clientMeks = await KeyService.getClientMeks(ctx.session.userId, ctx.session.clientId);
     return clientMeks.map(({ version, state, encMek, encMekSig }) => ({
       version,
       state,
@@ -37,26 +17,17 @@ const mekRouter = router({
   registerInitial: roleProcedure["pendingClient"]
     .input(
       z.object({
-        mek: z.base64().nonempty(),
-        mekSig: z.base64().nonempty(),
+        mek: Base64Schema,
+        mekSig: Base64Schema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const { userId, clientId } = ctx.session;
-      const { mek, mekSig } = input;
-      if (!(await verifyClientEncMekSig(userId, clientId, 1, mek, mekSig))) {
-        throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid signature" });
-      }
-
-      try {
-        await MekRepo.registerInitialMek(userId, clientId, mek, mekSig);
-        await ClientRepo.setUserClientStateToActive(userId, clientId);
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "MEK already registered") {
-          throw new TRPCError({ code: "CONFLICT", message: "Initial MEK already registered" });
-        }
-        throw e;
-      }
+      await KeyService.registerInitialMek(
+        ctx.session.userId,
+        ctx.session.clientId,
+        input.mek,
+        input.mekSig,
+      );
     }),
 });
 

src/trpc/routers/search.ts

@@ -1,7 +1,8 @@
 import { z } from "zod";
-import { DirectoryIdSchema } from "#lib/schemas/index.js";
-import { DirectoryRepo, FileRepo } from "#lib/server/db/index.js";
-import { router, roleProcedure } from "../init.server";
+import { SearchService } from "#lib/server/services/index.js";
+import { toDirectoryDto, toFileDto } from "#trpc/dto.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import { DirectoryIdSchema, IdSchema } from "#trpc/schemas.js";
 
 const searchRouter = router({
   search: roleProcedure["activeClient"]
@@ -9,51 +10,20 @@ const searchRouter = router({
       z.object({
         ancestor: DirectoryIdSchema.default("root"),
         inFavorites: z.boolean().default(false),
-        includeCategories: z.number().positive().array().default([]),
-        excludeCategories: z.number().positive().array().default([]),
+        includeCategories: IdSchema.array().default([]),
+        excludeCategories: IdSchema.array().default([]),
       }),
     )
     .query(async ({ ctx, input }) => {
-      const [directories, files] = await Promise.all([
-        input.includeCategories.length === 0 && input.excludeCategories.length === 0
-          ? DirectoryRepo.searchDirectories(ctx.session.userId, {
-              parentId: input.ancestor,
-              inFavorites: input.inFavorites,
-            })
-          : [],
-        FileRepo.searchFiles(ctx.session.userId, {
-          parentId: input.ancestor,
-          inFavorites: input.inFavorites,
-          includeCategoryIds: input.includeCategories,
-          excludeCategoryIds: input.excludeCategories,
-        }),
-      ]);
+      const { directories, files } = await SearchService.search(ctx.session.userId, {
+        ancestorId: input.ancestor,
+        inFavorites: input.inFavorites,
+        includeCategoryIds: input.includeCategories,
+        excludeCategoryIds: input.excludeCategories,
+      });
       return {
-        directories: directories.map((directory) => ({
-          id: directory.id,
-          parent: directory.parentId,
-          mekVersion: directory.mekVersion,
-          dek: directory.encDek,
-          dekVersion: directory.dekVersion,
-          name: directory.encName.ciphertext,
-          nameIv: directory.encName.iv,
-          isFavorite: directory.isFavorite,
-        })),
-        files: files.map((file) => ({
-          id: file.id,
-          parent: file.parentId,
-          mekVersion: file.mekVersion,
-          dek: file.encDek,
-          dekVersion: file.dekVersion,
-          contentType: file.contentType,
-          name: file.encName.ciphertext,
-          nameIv: file.encName.iv,
-          createdAt: file.encCreatedAt?.ciphertext,
-          createdAtIv: file.encCreatedAt?.iv,
-          lastModifiedAt: file.encLastModifiedAt.ciphertext,
-          lastModifiedAtIv: file.encLastModifiedAt.iv,
-          isFavorite: file.isFavorite,
-        })),
+        directories: directories.map(toDirectoryDto),
+        files: files.map(toFileDto),
       };
     }),
 });

src/trpc/routers/upload.ts

@@ -1,206 +1,87 @@
-import { TRPCError } from "@trpc/server";
-import { createHash } from "crypto";
-import { createReadStream } from "fs";
-import { mkdir, open } from "fs/promises";
 import mime from "mime";
-import { dirname } from "path";
-import { v4 as uuidv4 } from "uuid";
 import { z } from "zod";
-import { DirectoryIdSchema } from "#lib/schemas/index.js";
-import { FileRepo, MediaRepo, UploadRepo, IntegrityError } from "#lib/server/db/index.js";
-import db from "#lib/server/db/kysely.js";
-import env from "#lib/server/loadenv.js";
-import { safeUnlink } from "#lib/server/modules/filesystem.js";
-import { router, roleProcedure } from "../init.server";
-
-const UPLOADS_EXPIRES = 24 * 3600 * 1000; // 24 hours
-
-const sessionLocks = new Set<string>();
-
-const reserveUploadPath = async (path: string) => {
-  await mkdir(dirname(path), { recursive: true });
-  const file = await open(path, "wx", 0o600);
-  await file.close();
-};
-
-const generateFileUploadSession = async (userId: number) => {
-  const id = uuidv4();
-  const path = `${env.libraryPath}/${userId}/${uuidv4()}`;
-  await reserveUploadPath(path);
-  return { id, path };
-};
-
-const generateThumbnailUploadSession = async (userId: number) => {
-  const id = uuidv4();
-  const path = `${env.thumbnailsPath}/${userId}/${id}`;
-  await reserveUploadPath(path);
-  return { id, path };
-};
+import { UploadService } from "#lib/server/services/index.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
+import {
+  Base64Schema,
+  DirectoryIdSchema,
+  EncryptedNameSchema,
+  IdSchema,
+  toCiphertext,
+} from "#trpc/schemas.js";
 
 const uploadRouter = router({
   startFileUpload: roleProcedure["activeClient"]
     .input(
       z.object({
-        chunks: z.int().positive(),
+        chunks: IdSchema,
         parent: DirectoryIdSchema,
-        mekVersion: z.int().positive(),
-        dek: z.base64().nonempty(),
+        mekVersion: IdSchema,
+        dek: Base64Schema,
         dekVersion: z.date(),
-        hskVersion: z.int().positive().optional(),
+        hskVersion: IdSchema.optional(),
         contentType: z
           .string()
           .trim()
           .nonempty()
           .refine((value) => mime.getExtension(value) !== null),
-        name: z.base64().nonempty(),
-        nameIv: z.base64().nonempty(),
-        createdAt: z.base64().nonempty().optional(),
-        createdAtIv: z.base64().nonempty().optional(),
-        lastModifiedAt: z.base64().nonempty(),
-        lastModifiedAtIv: z.base64().nonempty(),
+        ...EncryptedNameSchema,
+        createdAt: Base64Schema.optional(),
+        createdAtIv: Base64Schema.optional(),
+        lastModifiedAt: Base64Schema,
+        lastModifiedAtIv: Base64Schema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const oneMinuteAgo = new Date(Date.now() - 60 * 1000);
-      const oneMinuteLater = new Date(Date.now() + 60 * 1000);
-      if (input.dekVersion <= oneMinuteAgo || input.dekVersion >= oneMinuteLater) {
-        throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid DEK version" });
-      }
-
-      const { id, path } = await generateFileUploadSession(ctx.session.userId);
-
-      try {
-        await UploadRepo.createFileUploadSession({
-          id,
-          userId: ctx.session.userId,
-          path,
-          totalChunks: input.chunks,
-          expiresAt: new Date(Date.now() + UPLOADS_EXPIRES),
-          parentId: input.parent,
-          mekVersion: input.mekVersion,
-          encDek: input.dek,
-          dekVersion: input.dekVersion,
-          hskVersion: input.hskVersion ?? null,
-          contentType: input.contentType,
-          encName: { ciphertext: input.name, iv: input.nameIv },
-          encCreatedAt:
-            input.createdAt && input.createdAtIv
-              ? { ciphertext: input.createdAt, iv: input.createdAtIv }
-              : null,
-          encLastModifiedAt: { ciphertext: input.lastModifiedAt, iv: input.lastModifiedAtIv },
-        });
-        return { uploadId: id };
-      } catch (e) {
-        await safeUnlink(path);
-
-        if (e instanceof IntegrityError) {
-          if (e.message === "Inactive MEK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid MEK version" });
-          } else if (e.message === "Inactive HSK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid HSK version" });
-          } else if (e.message === "Directory not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid parent directory id" });
-          }
-        }
-        throw e;
-      }
+      return await UploadService.startFileUpload({
+        userId: ctx.session.userId,
+        totalChunks: input.chunks,
+        parentId: input.parent,
+        mekVersion: input.mekVersion,
+        encDek: input.dek,
+        dekVersion: input.dekVersion,
+        hskVersion: input.hskVersion ?? null,
+        contentType: input.contentType,
+        encName: toCiphertext(input.name, input.nameIv),
+        encCreatedAt:
+          input.createdAt && input.createdAtIv
+            ? toCiphertext(input.createdAt, input.createdAtIv)
+            : null,
+        encLastModifiedAt: toCiphertext(input.lastModifiedAt, input.lastModifiedAtIv),
+      });
     }),
 
   completeFileUpload: roleProcedure["activeClient"]
     .input(
       z.object({
         uploadId: z.uuidv4(),
-        contentHmac: z.base64().nonempty().optional(),
-        encContentHash: z.base64().nonempty(),
+        contentHmac: Base64Schema.optional(),
+        encContentHash: Base64Schema,
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const { uploadId } = input;
-      if (sessionLocks.has(uploadId)) {
-        throw new TRPCError({ code: "CONFLICT", message: "Completion already in progress" });
-      } else {
-        sessionLocks.add(uploadId);
-      }
-
-      try {
-        const session = await UploadRepo.getUploadSession(uploadId, ctx.session.userId);
-        if (session?.type !== "file") {
-          throw new TRPCError({ code: "NOT_FOUND", message: "Invalid upload id" });
-        } else if (
-          (session.hskVersion && !input.contentHmac) ||
-          (!session.hskVersion && input.contentHmac)
-        ) {
-          throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid content HMAC" });
-        } else if (session.uploadedChunks < session.totalChunks) {
-          throw new TRPCError({ code: "BAD_REQUEST", message: "Upload not completed" });
-        }
-
-        const hashStream = createHash("sha256");
-
-        for await (const chunk of createReadStream(session.path)) {
-          hashStream.update(chunk);
-        }
-
-        const hash = hashStream.digest("base64");
-        if (hash !== input.encContentHash) {
-          await UploadRepo.deleteUploadSession(db, uploadId);
-          await safeUnlink(session.path);
-          throw new TRPCError({ code: "CONFLICT", message: "Uploaded file corrupted" });
-        }
-
-        const fileId = await db.transaction().execute(async (trx) => {
-          const { id: fileId } = await FileRepo.registerFile(trx, {
-            ...session,
-            userId: ctx.session.userId,
-            path: session.path,
-            contentHmac: input.contentHmac ?? null,
-            encContentHash: hash,
-            encContentIv: null,
-          });
-          await UploadRepo.deleteUploadSession(trx, uploadId);
-          return fileId;
-        });
-
-        return { file: fileId };
-      } finally {
-        sessionLocks.delete(uploadId);
-      }
+      const { fileId } = await UploadService.completeFileUpload(
+        ctx.session.userId,
+        input.uploadId,
+        input.contentHmac ?? null,
+        input.encContentHash,
+      );
+      return { file: fileId };
     }),
 
   startFileThumbnailUpload: roleProcedure["activeClient"]
     .input(
       z.object({
-        file: z.int().positive(),
+        file: IdSchema,
         dekVersion: z.date(),
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const { id, path } = await generateThumbnailUploadSession(ctx.session.userId);
-
-      try {
-        await UploadRepo.createThumbnailUploadSession({
-          id,
-          type: "thumbnail",
-          userId: ctx.session.userId,
-          path,
-          totalChunks: 1, // Up to 4 MiB
-          expiresAt: new Date(Date.now() + UPLOADS_EXPIRES),
-          fileId: input.file,
-          dekVersion: input.dekVersion,
-        });
-        return { uploadId: id };
-      } catch (e) {
-        await safeUnlink(path);
-
-        if (e instanceof IntegrityError) {
-          if (e.message === "File not found") {
-            throw new TRPCError({ code: "NOT_FOUND", message: "Invalid file id" });
-          } else if (e.message === "Invalid DEK version") {
-            throw new TRPCError({ code: "BAD_REQUEST", message: e.message });
-          }
-        }
-        throw e;
-      }
+      return await UploadService.startFileThumbnailUpload(
+        ctx.session.userId,
+        input.file,
+        input.dekVersion,
+      );
     }),
 
   completeFileThumbnailUpload: roleProcedure["activeClient"]
@@ -210,43 +91,7 @@ const uploadRouter = router({
       }),
     )
     .mutation(async ({ ctx, input }) => {
-      const { uploadId } = input;
-      if (sessionLocks.has(uploadId)) {
-        throw new TRPCError({ code: "CONFLICT", message: "Completion already in progress" });
-      } else {
-        sessionLocks.add(uploadId);
-      }
-
-      try {
-        const session = await UploadRepo.getUploadSession(uploadId, ctx.session.userId);
-        if (session?.type !== "thumbnail") {
-          throw new TRPCError({ code: "NOT_FOUND", message: "Invalid upload id" });
-        } else if (session.uploadedChunks < session.totalChunks) {
-          throw new TRPCError({ code: "BAD_REQUEST", message: "Upload not completed" });
-        }
-
-        const oldThumbnailPath = await db.transaction().execute(async (trx) => {
-          const oldPath = await MediaRepo.updateFileThumbnail(
-            trx,
-            ctx.session.userId,
-            session.fileId,
-            session.dekVersion,
-            session.path,
-            null,
-          );
-          await UploadRepo.deleteUploadSession(trx, uploadId);
-          return oldPath;
-        });
-        await safeUnlink(oldThumbnailPath);
-      } catch (e) {
-        if (e instanceof IntegrityError && e.message === "Invalid DEK version") {
-          // DEK rotated after this upload started
-          throw new TRPCError({ code: "CONFLICT", message: e.message });
-        }
-        throw e;
-      } finally {
-        sessionLocks.delete(uploadId);
-      }
+      await UploadService.completeFileThumbnailUpload(ctx.session.userId, input.uploadId);
     }),
 });
 

src/trpc/routers/user.ts

@@ -1,15 +1,10 @@
-import { TRPCError } from "@trpc/server";
-import { UserRepo } from "#lib/server/db/index.js";
-import { router, roleProcedure } from "../init.server";
+import { UserService } from "#lib/server/services/index.js";
+import { router, roleProcedure } from "#trpc/init.server.js";
 
 const userRouter = router({
   get: roleProcedure["any"].query(async ({ ctx }) => {
-    const user = await UserRepo.getUser(ctx.session.userId);
-    if (!user) {
-      throw new TRPCError({ code: "INTERNAL_SERVER_ERROR", message: "Invalid session id" });
-    }
-
-    return { email: user.email, nickname: user.nickname };
+    const { email, nickname } = await UserService.getUser(ctx.session.userId);
+    return { email, nickname };
   }),
 });
 

src/trpc/schemas.ts

@@ -0,0 +1,13 @@
+import { z } from "zod";
+
+export const IdSchema = z.int().positive();
+export const DirectoryIdSchema = z.union([z.literal("root"), IdSchema]);
+export const CategoryIdSchema = z.union([z.literal("root"), IdSchema]);
+export const Base64Schema = z.base64().nonempty();
+
+export const EncryptedNameSchema = {
+  name: Base64Schema,
+  nameIv: Base64Schema,
+};
+
+export const toCiphertext = (ciphertext: string, iv: string) => ({ ciphertext, iv });

tests/helpers/database.ts

@@ -82,3 +82,33 @@ export const newEntryParams = (userId: number, parentId: number | "root") => ({
   dekVersion: new Date(),
   encName: ciphertext(),
 });
+
+export const createFile = async (userId: number, parentId: DirectoryId, path: string) => {
+  const n = nextSequence();
+  const { id } = await db
+    .insertInto("file")
+    .values({
+      parent_id: parentId === "root" ? null : parentId,
+      user_id: userId,
+      path,
+      master_encryption_key_version: 1,
+      encrypted_data_encryption_key: `dek${n}`,
+      data_encryption_key_version: new Date(),
+      hmac_secret_key_version: null,
+      content_hmac: null,
+      content_type: "image/png",
+      encrypted_content_iv: null,
+      encrypted_content_hash: "hash",
+      encrypted_name: ciphertext(),
+      encrypted_created_at: null,
+      encrypted_last_modified_at: ciphertext(),
+    })
+    .returning("id")
+    .executeTakeFirstOrThrow();
+  return id;
+};
+
+export const getQueuedDeletions = async () => {
+  const rows = await db.selectFrom("file_deletion_queue").select("path").execute();
+  return rows.map(({ path }) => path).sort();
+};

tests/helpers/storage.ts

@@ -0,0 +1,12 @@
+import { mkdir, writeFile } from "fs/promises";
+import { dirname, join } from "path";
+import env from "#lib/server/config.js";
+
+let sequence = 0;
+
+export const createStoredFile = async (content: string | Buffer = "content") => {
+  const path = join(env.libraryPath, "test", `file${++sequence}`);
+  await mkdir(dirname(path), { recursive: true });
+  await writeFile(path, content);
+  return path;
+};

tests/server/deletion.test.ts

@@ -0,0 +1,92 @@
+import { access } from "fs/promises";
+import { beforeEach, describe, expect, it } from "vitest";
+import { UploadRepo } from "#lib/server/db/index.js";
+import { DirectoryService, FileService } from "#lib/server/services/index.js";
+import { processPendingFileDeletions } from "#lib/server/services/fileDeletion.js";
+import {
+  ciphertext,
+  createDirectory,
+  createFile,
+  createUser,
+  getQueuedDeletions,
+  newEntryParams,
+  resetDatabase,
+} from "../helpers/database";
+import { createStoredFile } from "../helpers/storage";
+
+const exists = (path: string) =>
+  access(path).then(
+    () => true,
+    () => false,
+  );
+
+beforeEach(resetDatabase);
+
+describe("file deletion", () => {
+  it("deletes the stored file after the database row is deleted", async () => {
+    const { userId } = await createUser();
+    const path = await createStoredFile();
+    const fileId = await createFile(userId, "root", path);
+
+    await FileService.deleteFile(userId, fileId);
+    await processPendingFileDeletions();
+
+    expect(await exists(path)).toBe(false);
+    expect(await getQueuedDeletions()).toEqual([]);
+  });
+
+  it("keeps failed deletions in the queue", async () => {
+    const { userId } = await createUser();
+    const fileId = await createFile(userId, "root", "/proc/version"); // Can't be deleted
+
+    await FileService.deleteFile(userId, fileId);
+    await processPendingFileDeletions();
+
+    expect(await getQueuedDeletions()).toEqual(["/proc/version"]);
+  });
+
+  it("deletes directories recursively including pending uploads", async () => {
+    const { userId } = await createUser();
+    const rootId = await createDirectory(userId);
+    const childId = await createDirectory(userId, rootId);
+    const grandchildId = await createDirectory(userId, childId);
+    const otherId = await createDirectory(userId);
+
+    const paths = await Promise.all([1, 2, 3, 4].map(() => createStoredFile()));
+    const fileIds = [
+      await createFile(userId, rootId, paths[0]!),
+      await createFile(userId, grandchildId, paths[1]!),
+    ];
+    const otherFileId = await createFile(userId, otherId, paths[2]!);
+    await UploadRepo.createFileUploadSession({
+      ...newEntryParams(userId, childId),
+      id: crypto.randomUUID(),
+      path: paths[3]!,
+      totalChunks: 1,
+      expiresAt: new Date(Date.now() + 60_000),
+      hskVersion: null,
+      contentType: "image/png",
+      encCreatedAt: null,
+      encLastModifiedAt: ciphertext(),
+    });
+
+    const { deletedFileIds } = await DirectoryService.deleteDirectory(userId, rootId);
+
+    expect(deletedFileIds.sort()).toEqual(fileIds.sort());
+    expect(await getQueuedDeletions()).toEqual([paths[0], paths[1], paths[3]].sort());
+    await expect(DirectoryService.getDirectory(userId, grandchildId)).rejects.toMatchObject({
+      code: "NOT_FOUND",
+    });
+    expect((await FileService.getFile(userId, otherFileId)).id).toBe(otherFileId);
+  });
+
+  it("rejects deleting another user's directory", async () => {
+    const { userId: ownerId } = await createUser();
+    const { userId: otherId } = await createUser();
+    const directoryId = await createDirectory(ownerId);
+
+    await expect(DirectoryService.deleteDirectory(otherId, directoryId)).rejects.toMatchObject({
+      code: "NOT_FOUND",
+    });
+  });
+});

tests/server/download.test.ts

@@ -4,7 +4,7 @@ import { join } from "path";
 import { buffer } from "stream/consumers";
 import type { ReadableStream } from "stream/web";
 import { describe, expect, it } from "vitest";
-import { createEncContentStream } from "#lib/server/services/file.js";
+import { createEncContentStream } from "#lib/server/storage/index.js";
 
 const createFile = async (content: string) => {
   const path = join(await mkdtemp(join(tmpdir(), "arkvault-test-")), "file");

tests/server/trpc.test.ts

@@ -0,0 +1,55 @@
+import type { RequestEvent } from "@sveltejs/kit";
+import { TRPCError } from "@trpc/server";
+import { beforeEach, describe, expect, it } from "vitest";
+import { appRouter } from "#trpc/router.server.js";
+import { createDirectory, createUser, resetDatabase } from "../helpers/database";
+
+const createCaller = (userId: number, clientId?: number) =>
+  appRouter.createCaller({
+    locals: { ip: "127.0.0.1", userAgent: "test", session: { id: "session", userId, clientId } },
+  } as RequestEvent);
+
+beforeEach(resetDatabase);
+
+describe("tRPC error mapping", () => {
+  it("maps integrity errors to tRPC errors", async () => {
+    const { userId: ownerId } = await createUser();
+    const { userId, clientId } = await createUser();
+    const directoryId = await createDirectory(ownerId);
+
+    const error = await createCaller(userId, clientId)
+      .directory.create({
+        parent: directoryId,
+        mekVersion: 1,
+        dek: "ZGVr",
+        dekVersion: new Date(),
+        name: "bmFtZQ==",
+        nameIv: "aXY=",
+      })
+      .catch((e) => e);
+
+    expect(error).toBeInstanceOf(TRPCError);
+    expect(error).toMatchObject({ code: "NOT_FOUND", message: "Directory not found" });
+  });
+
+  it("maps service errors to tRPC errors", async () => {
+    const { userId, clientId } = await createUser();
+
+    await expect(
+      createCaller(userId, clientId).directory.create({
+        parent: "root",
+        mekVersion: 1,
+        dek: "ZGVr",
+        dekVersion: new Date(Date.now() - 3600 * 1000),
+        name: "bmFtZQ==",
+        nameIv: "aXY=",
+      }),
+    ).rejects.toMatchObject({ code: "BAD_REQUEST", message: "Invalid DEK version" });
+  });
+
+  it("rejects clients that are not active", async () => {
+    const { userId } = await createUser();
+
+    await expect(createCaller(userId).file.list()).rejects.toMatchObject({ code: "FORBIDDEN" });
+  });
+});

tests/server/upload.test.ts

@@ -1,5 +1,8 @@
+import { createHash } from "crypto";
+import { Readable } from "stream";
 import { beforeEach, describe, expect, it } from "vitest";
 import { UploadRepo } from "#lib/server/db/index.js";
+import { FileService, UploadService } from "#lib/server/services/index.js";
 import { isChunkUploaded } from "#lib/server/services/upload.js";
 import { ciphertext, createUser, newEntryParams, resetDatabase } from "../helpers/database";
 
@@ -33,3 +36,66 @@ describe("upload session bitmap", () => {
     }
   });
 });
+
+describe("upload completion", () => {
+  it("registers the file only once when completed concurrently", async () => {
+    const { userId } = await createUser();
+    const { uploadId } = await UploadService.startFileUpload({
+      ...newEntryParams(userId, "root"),
+      totalChunks: 1,
+      hskVersion: null,
+      contentType: "image/png",
+      encCreatedAt: null,
+      encLastModifiedAt: ciphertext(),
+    });
+
+    const chunk = Buffer.alloc(100, 1);
+    await UploadService.uploadChunk(userId, uploadId, 1, Readable.from([chunk]));
+    const hash = createHash("sha256").update(chunk).digest("base64");
+
+    const results = await Promise.allSettled([
+      UploadService.completeFileUpload(userId, uploadId, null, hash),
+      UploadService.completeFileUpload(userId, uploadId, null, hash),
+    ]);
+
+    expect(results.filter(({ status }) => status === "fulfilled")).toHaveLength(1);
+    expect(results.find(({ status }) => status === "rejected")).toMatchObject({
+      reason: { code: "NOT_FOUND" },
+    });
+    expect(await FileService.getAllFileIds(userId)).toHaveLength(1);
+  });
+
+  it("discards corrupted uploads", async () => {
+    const { userId } = await createUser();
+    const { uploadId } = await UploadService.startFileUpload({
+      ...newEntryParams(userId, "root"),
+      totalChunks: 1,
+      hskVersion: null,
+      contentType: "image/png",
+      encCreatedAt: null,
+      encLastModifiedAt: ciphertext(),
+    });
+    await UploadService.uploadChunk(userId, uploadId, 1, Readable.from([Buffer.alloc(100)]));
+
+    await expect(
+      UploadService.completeFileUpload(userId, uploadId, null, "invalid"),
+    ).rejects.toMatchObject({ code: "CONFLICT" });
+    expect(await UploadRepo.getUploadSession(uploadId, userId)).toBeNull();
+  });
+
+  it("rejects chunks of invalid sizes", async () => {
+    const { userId } = await createUser();
+    const { uploadId } = await UploadService.startFileUpload({
+      ...newEntryParams(userId, "root"),
+      totalChunks: 2,
+      hskVersion: null,
+      contentType: "image/png",
+      encCreatedAt: null,
+      encLastModifiedAt: ciphertext(),
+    });
+
+    await expect(
+      UploadService.uploadChunk(userId, uploadId, 1, Readable.from([Buffer.alloc(100)])),
+    ).rejects.toMatchObject({ code: "BAD_REQUEST" });
+  });
+});

tests/setup/server.ts

@@ -5,7 +5,7 @@ import { vi } from "vitest";
 
 const storagePath = await mkdtemp(join(tmpdir(), "arkvault-test-"));
 
-vi.mock("#lib/server/loadenv.js", async () => {
+vi.mock("#lib/server/config.js", async () => {
   const { inject } = await import("vitest");
   return {
     default: {