카테고리 관련 API 요청을 TanStack Query로 마이그레이션 (WiP)

Dockerfile

@@ -2,7 +2,11 @@
 FROM node:22-alpine AS base
 WORKDIR /app
 
-RUN npm install -g pnpm@10
+RUN apk add --no-cache bash curl && \
+    curl -o /usr/local/bin/wait-for-it https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh && \
+    chmod +x /usr/local/bin/wait-for-it
+
+RUN npm install -g pnpm@9
 COPY pnpm-lock.yaml .
 
 # Build Stage
@@ -25,4 +29,4 @@ COPY --from=build /app/build ./build
 
 EXPOSE 3000
 ENV BODY_SIZE_LIMIT=Infinity
-CMD ["node", "./build/index.js"]
+CMD ["bash", "-c", "wait-for-it ${DATABASE_HOST:-localhost}:${DATABASE_PORT:-5432} -- node ./build/index.js"]

docker-compose.yaml

@@ -3,8 +3,7 @@ services:
     build: .
     restart: unless-stopped
     depends_on:
-      database:
-        condition: service_healthy
+      - database
     user: ${CONTAINER_UID:-0}:${CONTAINER_GID:-0}
     volumes:
       - ./data/library:/app/data/library
@@ -36,8 +35,3 @@ services:
     environment:
       - POSTGRES_USER=arkvault
       - POSTGRES_PASSWORD=${DATABASE_PASSWORD:?}
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER}"]
-      interval: 5s
-      timeout: 5s
-      retries: 5

eslint.config.js

@@ -1,24 +1,23 @@
 import { includeIgnoreFile } from "@eslint/compat";
 import js from "@eslint/js";
-import { defineConfig } from "eslint/config";
+import svelteQuery from "@tanstack/eslint-plugin-query";
 import prettier from "eslint-config-prettier";
 import svelte from "eslint-plugin-svelte";
 import tailwind from "eslint-plugin-tailwindcss";
 import globals from "globals";
 import ts from "typescript-eslint";
 import { fileURLToPath } from "url";
-import svelteConfig from "./svelte.config.js";
 
 const gitignorePath = fileURLToPath(new URL("./.gitignore", import.meta.url));
 
-export default defineConfig(
+export default ts.config(
   includeIgnoreFile(gitignorePath),
   js.configs.recommended,
   ...ts.configs.recommended,
-  ...svelte.configs.recommended,
+  ...svelte.configs["flat/recommended"],
   ...tailwind.configs["flat/recommended"],
   prettier,
-  ...svelte.configs.prettier,
+  ...svelte.configs["flat/prettier"],
   {
     languageOptions: {
       globals: {
@@ -26,19 +25,14 @@ export default defineConfig(
         ...globals.node,
       },
     },
-    rules: {
-      "no-undef": "off",
-    },
   },
   {
-    files: ["**/*.svelte", "**/*.svelte.ts", "**/*.svelte.js"],
+    files: ["**/*.svelte"],
     languageOptions: {
       parserOptions: {
-        projectService: true,
-        extraFileExtensions: [".svelte"],
         parser: ts.parser,
-        svelteConfig,
       },
     },
   },
+  ...svelteQuery.configs["flat/recommended"],
 );

package.json

@@ -1,7 +1,7 @@
 {
   "name": "arkvault",
   "private": true,
-  "version": "0.6.0",
+  "version": "0.5.1",
   "type": "module",
   "scripts": {
     "dev": "vite dev",
@@ -16,57 +16,55 @@
     "db:migrate": "kysely migrate"
   },
   "devDependencies": {
-    "@eslint/compat": "^2.0.0",
-    "@iconify-json/material-symbols": "^1.2.50",
-    "@sveltejs/adapter-node": "^5.4.0",
-    "@sveltejs/kit": "^2.49.2",
-    "@sveltejs/vite-plugin-svelte": "^6.2.1",
-    "@tanstack/svelte-virtual": "^3.13.13",
-    "@trpc/client": "^11.8.1",
+    "@eslint/compat": "^1.3.1",
+    "@iconify-json/material-symbols": "^1.2.29",
+    "@sveltejs/adapter-node": "^5.2.13",
+    "@sveltejs/kit": "^2.22.5",
+    "@sveltejs/vite-plugin-svelte": "^4.0.4",
+    "@tanstack/eslint-plugin-query": "^5.81.2",
+    "@tanstack/svelte-query": "^5.83.0",
     "@types/file-saver": "^2.0.7",
     "@types/ms": "^0.7.34",
     "@types/node-schedule": "^2.1.8",
-    "@types/pg": "^8.16.0",
-    "autoprefixer": "^10.4.23",
-    "axios": "^1.13.2",
-    "dexie": "^4.2.1",
-    "eslint": "^9.39.2",
-    "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-svelte": "^3.13.1",
-    "eslint-plugin-tailwindcss": "^3.18.2",
-    "exifreader": "^4.33.1",
+    "@types/pg": "^8.15.4",
+    "autoprefixer": "^10.4.21",
+    "axios": "^1.10.0",
+    "dexie": "^4.0.11",
+    "eslint": "^9.30.1",
+    "eslint-config-prettier": "^10.1.5",
+    "eslint-plugin-svelte": "^3.10.1",
+    "eslint-plugin-tailwindcss": "^3.18.0",
+    "exifreader": "^4.31.1",
     "file-saver": "^2.0.5",
-    "globals": "^16.5.0",
+    "globals": "^16.3.0",
     "heic2any": "^0.0.4",
-    "kysely-ctl": "^0.19.0",
-    "lru-cache": "^11.2.4",
-    "mime": "^4.1.0",
-    "p-limit": "^7.2.0",
-    "prettier": "^3.7.4",
-    "prettier-plugin-svelte": "^3.4.1",
-    "prettier-plugin-tailwindcss": "^0.7.2",
-    "svelte": "^5.46.1",
-    "svelte-check": "^4.3.5",
-    "tailwindcss": "^3.4.19",
-    "typescript": "^5.9.3",
-    "typescript-eslint": "^8.50.1",
-    "unplugin-icons": "^22.5.0",
-    "vite": "^7.3.0"
+    "kysely-ctl": "^0.13.1",
+    "lru-cache": "^11.1.0",
+    "mime": "^4.0.7",
+    "p-limit": "^6.2.0",
+    "prettier": "^3.6.2",
+    "prettier-plugin-svelte": "^3.4.0",
+    "prettier-plugin-tailwindcss": "^0.6.14",
+    "svelte": "^5.35.6",
+    "svelte-check": "^4.2.2",
+    "tailwindcss": "^3.4.17",
+    "typescript": "^5.8.3",
+    "typescript-eslint": "^8.36.0",
+    "unplugin-icons": "^22.1.0",
+    "vite": "^5.4.19"
   },
   "dependencies": {
-    "@fastify/busboy": "^3.2.0",
-    "@trpc/server": "^11.8.1",
-    "argon2": "^0.44.0",
-    "kysely": "^0.28.9",
+    "@fastify/busboy": "^3.1.1",
+    "argon2": "^0.43.0",
+    "kysely": "^0.28.2",
     "ms": "^2.1.3",
     "node-schedule": "^2.1.1",
     "pg": "^8.16.3",
-    "superjson": "^2.2.6",
-    "uuid": "^13.0.0",
-    "zod": "^4.2.1"
+    "uuid": "^11.1.0",
+    "zod": "^3.25.76"
   },
   "engines": {
     "node": "^22.0.0",
-    "pnpm": "^10.0.0"
+    "pnpm": "^9.0.0"
   }
 }

src/lib/components/atoms/RowVirtualizer.svelte

@@ -1,46 +0,0 @@
-<script lang="ts">
-  import { createWindowVirtualizer } from "@tanstack/svelte-virtual";
-  import { untrack, type Snippet } from "svelte";
-  import type { ClassValue } from "svelte/elements";
-
-  interface Props {
-    class?: ClassValue;
-    count: number;
-    item: Snippet<[index: number]>;
-    itemHeight: (index: number) => number;
-    placeholder?: Snippet;
-  }
-
-  let { class: className, count, item, itemHeight, placeholder }: Props = $props();
-
-  const virtualizer = $derived(
-    createWindowVirtualizer({
-      count: untrack(() => count),
-      estimateSize: itemHeight,
-    }),
-  );
-
-  const measureItem = (node: HTMLElement) => {
-    $effect(() => $virtualizer.measureElement(node));
-  };
-
-  $effect(() => $virtualizer.setOptions({ count }));
-</script>
-
-<div class={["relative", className]}>
-  <div style:height="{$virtualizer.getTotalSize()}px">
-    {#each $virtualizer.getVirtualItems() as virtualItem (virtualItem.key)}
-      <div
-        class="absolute left-0 top-0 w-full"
-        style:transform="translateY({virtualItem.start}px)"
-        data-index={virtualItem.index}
-        use:measureItem
-      >
-        {@render item(virtualItem.index)}
-      </div>
-    {/each}
-  </div>
-  {#if placeholder && $virtualizer.getVirtualItems().length === 0}
-    {@render placeholder()}
-  {/if}
-</div>

src/lib/components/atoms/buttons/FileThumbnailButton.svelte

@@ -1,42 +0,0 @@
-<script lang="ts">
-  import type { Writable } from "svelte/store";
-  import type { FileInfo } from "$lib/modules/filesystem";
-  import { requestFileThumbnailDownload } from "$lib/services/file";
-
-  interface Props {
-    info: Writable<FileInfo | null>;
-    onclick?: (file: FileInfo) => void;
-  }
-
-  let { info, onclick }: Props = $props();
-
-  let thumbnail: string | undefined = $state();
-
-  $effect(() => {
-    if ($info) {
-      requestFileThumbnailDownload($info.id, $info.dataKey)
-        .then((thumbnailUrl) => {
-          thumbnail = thumbnailUrl ?? undefined;
-        })
-        .catch(() => {
-          // TODO: Error Handling
-          thumbnail = undefined;
-        });
-    } else {
-      thumbnail = undefined;
-    }
-  });
-</script>
-
-{#if $info}
-  <button
-    onclick={() => onclick?.($info)}
-    class="aspect-square overflow-hidden rounded transition active:scale-95 active:brightness-90"
-  >
-    {#if thumbnail}
-      <img src={thumbnail} alt={$info.name} class="h-full w-full object-cover" />
-    {:else}
-      <div class="h-full w-full bg-gray-100"></div>
-    {/if}
-  </button>
-{/if}

src/lib/components/atoms/buttons/index.ts

@@ -1,6 +1,5 @@
 export { default as ActionEntryButton } from "./ActionEntryButton.svelte";
 export { default as Button } from "./Button.svelte";
 export { default as EntryButton } from "./EntryButton.svelte";
-export { default as FileThumbnailButton } from "./FileThumbnailButton.svelte";
 export { default as FloatingButton } from "./FloatingButton.svelte";
 export { default as TextButton } from "./TextButton.svelte";

src/lib/components/atoms/index.ts

@@ -3,4 +3,3 @@ export * from "./buttons";
 export * from "./divs";
 export * from "./inputs";
 export { default as Modal } from "./Modal.svelte";
-export { default as RowVirtualizer } from "./RowVirtualizer.svelte";

src/lib/components/molecules/Categories/Categories.svelte

@@ -1,14 +1,16 @@
 <script lang="ts">
-  import { untrack, type Component } from "svelte";
+  import type { Component } from "svelte";
   import type { SvelteHTMLElements } from "svelte/elements";
-  import { get, type Writable } from "svelte/store";
-  import type { CategoryInfo } from "$lib/modules/filesystem";
-  import { SortBy, sortEntries } from "$lib/utils";
+  import { derived } from "svelte/store";
+  import type { CategoryId } from "$lib/indexedDB";
+  import { getCategoryInfo, type SubCategoryInfo } from "$lib/modules/filesystem2";
+  import { SortBy, sortEntries } from "$lib/modules/util";
+  import { masterKeyStore } from "$lib/stores";
   import Category from "./Category.svelte";
   import type { SelectedCategory } from "./service";
 
   interface Props {
-    categories: Writable<CategoryInfo | null>[];
+    categoryIds: CategoryId[];
     categoryMenuIcon?: Component<SvelteHTMLElements["svg"]>;
     onCategoryClick: (category: SelectedCategory) => void;
     onCategoryMenuClick?: (category: SelectedCategory) => void;
@@ -16,42 +18,33 @@
   }
 
   let {
-    categories,
+    categoryIds,
     categoryMenuIcon,
     onCategoryClick,
     onCategoryMenuClick,
     sortBy = SortBy.NAME_ASC,
   }: Props = $props();
 
-  let categoriesWithName: { name?: string; info: Writable<CategoryInfo | null> }[] = $state([]);
-
-  $effect(() => {
-    categoriesWithName = categories.map((category) => ({
-      name: get(category)?.name,
-      info: category,
-    }));
-
-    const sort = () => {
-      sortEntries(categoriesWithName, sortBy);
-    };
-    return untrack(() => {
-      sort();
-
-      const unsubscribes = categoriesWithName.map((category) =>
-        category.info.subscribe((value) => {
-          if (category.name === value?.name) return;
-          category.name = value?.name;
-          sort();
-        }),
-      );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
+  let categories = $derived(
+    derived(
+      categoryIds.map((id) => getCategoryInfo(id, $masterKeyStore?.get(1)?.key!)),
+      (infos) => {
+        const categories = infos
+          .filter(($info) => $info.status === "success")
+          .map(($info) => ({
+            name: $info.data.name,
+            info: $info.data as SubCategoryInfo,
+          }));
+        sortEntries(categories, sortBy);
+        return categories;
+      },
+    ),
+  );
 </script>
 
-{#if categoriesWithName.length > 0}
+{#if $categories.length > 0}
   <div class="space-y-1">
-    {#each categoriesWithName as { info }}
+    {#each $categories as { info }}
       <Category
         {info}
         menuIcon={categoryMenuIcon}

src/lib/components/molecules/Categories/Category.svelte

@@ -1,14 +1,13 @@
 <script lang="ts">
   import type { Component } from "svelte";
   import type { SvelteHTMLElements } from "svelte/elements";
-  import type { Writable } from "svelte/store";
   import { ActionEntryButton } from "$lib/components/atoms";
   import { CategoryLabel } from "$lib/components/molecules";
-  import type { CategoryInfo } from "$lib/modules/filesystem";
+  import type { SubCategoryInfo } from "$lib/modules/filesystem2";
   import type { SelectedCategory } from "./service";
 
   interface Props {
-    info: Writable<CategoryInfo | null>;
+    info: SubCategoryInfo;
     menuIcon?: Component<SvelteHTMLElements["svg"]>;
     onclick: (category: SelectedCategory) => void;
     onMenuClick?: (category: SelectedCategory) => void;
@@ -17,27 +16,25 @@
   let { info, menuIcon, onclick, onMenuClick }: Props = $props();
 
   const openCategory = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as CategoryInfo;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onclick({ id, dataKey, dataKeyVersion, name });
   };
 
   const openMenu = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as CategoryInfo;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onMenuClick!({ id, dataKey, dataKeyVersion, name });
   };
 </script>
 
-{#if $info}
-  <ActionEntryButton
-    class="h-12"
-    onclick={openCategory}
-    actionButtonIcon={menuIcon}
-    onActionButtonClick={openMenu}
-  >
-    <CategoryLabel name={$info.name!} />
-  </ActionEntryButton>
-{/if}
+<ActionEntryButton
+  class="h-12"
+  onclick={openCategory}
+  actionButtonIcon={menuIcon}
+  onActionButtonClick={openMenu}
+>
+  <CategoryLabel name={info.name} />
+</ActionEntryButton>

src/lib/components/molecules/SubCategories.svelte

@@ -1,10 +1,8 @@
 <script lang="ts">
   import type { Component } from "svelte";
   import type { ClassValue, SvelteHTMLElements } from "svelte/elements";
-  import type { Writable } from "svelte/store";
   import { Categories, IconEntryButton, type SelectedCategory } from "$lib/components/molecules";
-  import { getCategoryInfo, type CategoryInfo } from "$lib/modules/filesystem";
-  import { masterKeyStore } from "$lib/stores";
+  import type { CategoryInfo } from "$lib/modules/filesystem2";
 
   import IconAddCircle from "~icons/material-symbols/add-circle";
 
@@ -27,14 +25,6 @@
     subCategoryCreatePosition = "bottom",
     subCategoryMenuIcon,
   }: Props = $props();
-
-  let subCategories: Writable<CategoryInfo | null>[] = $state([]);
-
-  $effect(() => {
-    subCategories = info.subCategoryIds.map((id) =>
-      getCategoryInfo(id, $masterKeyStore?.get(1)?.key!),
-    );
-  });
 </script>
 
 <div class={["space-y-1", className]}>
@@ -55,7 +45,7 @@
   {/if}
   {#key info}
     <Categories
-      categories={subCategories}
+      categoryIds={info.subCategoryIds}
       categoryMenuIcon={subCategoryMenuIcon}
       onCategoryClick={onSubCategoryClick}
       onCategoryMenuClick={onSubCategoryMenuClick}

src/lib/components/molecules/labels/DirectoryEntryLabel.svelte

@@ -3,7 +3,6 @@
   import { IconLabel } from "$lib/components/molecules";
 
   import IconFolder from "~icons/material-symbols/folder";
-  import IconDriveFolderUpload from "~icons/material-symbols/drive-folder-upload";
   import IconDraft from "~icons/material-symbols/draft";
 
   interface Props {
@@ -12,7 +11,7 @@
     subtext?: string;
     textClass?: ClassValue;
     thumbnail?: string;
-    type: "directory" | "parent-directory" | "file";
+    type: "directory" | "file";
   }
 
   let {
@@ -31,8 +30,6 @@
       <img src={thumbnail} alt={name} loading="lazy" class="aspect-square rounded object-cover" />
     {:else if type === "directory"}
       <IconFolder />
-    {:else if type === "parent-directory"}
-      <IconDriveFolderUpload class="text-yellow-500" />
     {:else}
       <IconDraft class="text-blue-400" />
     {/if}

src/lib/components/organisms/Category/Category.svelte

@@ -1,11 +1,10 @@
 <script lang="ts">
-  import { untrack } from "svelte";
-  import { get, type Writable } from "svelte/store";
-  import { CheckBox, RowVirtualizer } from "$lib/components/atoms";
+  import { derived } from "svelte/store";
+  import { CheckBox } from "$lib/components/atoms";
   import { SubCategories, type SelectedCategory } from "$lib/components/molecules";
-  import { getFileInfo, type FileInfo, type CategoryInfo } from "$lib/modules/filesystem";
+  import { getFileInfo, type CategoryInfo } from "$lib/modules/filesystem2";
+  import { SortBy, sortEntries } from "$lib/modules/util";
   import { masterKeyStore } from "$lib/stores";
-  import { SortBy, sortEntries } from "$lib/utils";
   import File from "./File.svelte";
   import type { SelectedFile } from "./service";
 
@@ -19,7 +18,7 @@
     onSubCategoryCreateClick: () => void;
     onSubCategoryMenuClick: (subCategory: SelectedCategory) => void;
     sortBy?: SortBy;
-    isFileRecursive: boolean;
+    isFileRecursive?: boolean;
   }
 
   let {
@@ -33,39 +32,35 @@
     isFileRecursive = $bindable(),
   }: Props = $props();
 
-  let files: { name?: string; info: Writable<FileInfo | null>; isRecursive: boolean }[] = $state(
-    [],
+  let fileInfos = $derived(
+    info.files
+      ?.filter(({ isRecursive }) => isFileRecursive || !isRecursive)
+      .map(({ id, isRecursive }) => ({
+        info: getFileInfo(id, $masterKeyStore?.get(1)?.key!),
+        isRecursive,
+      })) ?? [],
+  );
+  let files = $derived(
+    derived(
+      fileInfos.map(({ info }) => info),
+      (infos) => {
+        const files = infos
+          .map(($info, i) => {
+            if ($info.status === "success") {
+              return {
+                name: $info.data.name,
+                isRecursive: fileInfos[i]!.isRecursive,
+                info: $info.data,
+              };
+            }
+            return undefined;
+          })
+          .filter((info) => info !== undefined);
+        sortEntries(files, sortBy);
+        return files;
+      },
+    ),
   );
-
-  $effect(() => {
-    files =
-      info.files
-        ?.filter(({ isRecursive }) => isFileRecursive || !isRecursive)
-        .map(({ id, isRecursive }) => {
-          const info = getFileInfo(id, $masterKeyStore?.get(1)?.key!);
-          return {
-            name: get(info)?.name,
-            info,
-            isRecursive,
-          };
-        }) ?? [];
-
-    const sort = () => {
-      sortEntries(files, sortBy);
-    };
-    return untrack(() => {
-      sort();
-
-      const unsubscribes = files.map((file) =>
-        file.info.subscribe((value) => {
-          if (file.name === value?.name) return;
-          file.name = value?.name;
-          sort();
-        }),
-      );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
 </script>
 
 <div class="space-y-4">
@@ -85,30 +80,25 @@
     <div class="space-y-4 bg-white p-4">
       <div class="flex items-center justify-between">
         <p class="text-lg font-bold text-gray-800">파일</p>
-        <CheckBox bind:checked={isFileRecursive}>
-          <p class="font-medium">하위 카테고리의 파일</p>
-        </CheckBox>
+        {#if isFileRecursive !== undefined}
+          <CheckBox bind:checked={isFileRecursive}>
+            <p class="font-medium">하위 카테고리의 파일</p>
+          </CheckBox>
+        {/if}
+      </div>
+      <div class="space-y-1">
+        {#key info}
+          {#each $files as { info, isRecursive }}
+            <File
+              {info}
+              onclick={onFileClick}
+              onRemoveClick={!isRecursive ? onFileRemoveClick : undefined}
+            />
+          {:else}
+            <p class="text-gray-500 text-center">이 카테고리에 추가된 파일이 없어요.</p>
+          {/each}
+        {/key}
       </div>
-      {#key info}
-        <RowVirtualizer
-          count={files.length}
-          itemHeight={(index) => 48 + (index + 1 < files.length ? 4 : 0)}
-        >
-          {#snippet item(index)}
-            {@const { info, isRecursive } = files[index]!}
-            <div class={[index + 1 < files.length && "pb-1"]}>
-              <File
-                {info}
-                onclick={onFileClick}
-                onRemoveClick={!isRecursive ? onFileRemoveClick : undefined}
-              />
-            </div>
-          {/snippet}
-          {#snippet placeholder()}
-            <p class="text-center text-gray-500">이 카테고리에 추가된 파일이 없어요.</p>
-          {/snippet}
-        </RowVirtualizer>
-      {/key}
     </div>
   {/if}
 </div>

src/lib/components/organisms/Category/File.svelte

@@ -1,14 +1,13 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
   import { ActionEntryButton } from "$lib/components/atoms";
   import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import type { FileInfo } from "$lib/modules/filesystem";
+  import type { FileInfo } from "$lib/modules/filesystem2";
   import { requestFileThumbnailDownload, type SelectedFile } from "./service";
 
   import IconClose from "~icons/material-symbols/close";
 
   interface Props {
-    info: Writable<FileInfo | null>;
+    info: FileInfo;
     onclick: (selectedFile: SelectedFile) => void;
     onRemoveClick?: (selectedFile: SelectedFile) => void;
   }
@@ -18,22 +17,22 @@
   let thumbnail: string | undefined = $state();
 
   const openFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as FileInfo;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onclick({ id, dataKey, dataKeyVersion, name });
   };
 
   const removeFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as FileInfo;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onRemoveClick!({ id, dataKey, dataKeyVersion, name });
   };
 
   $effect(() => {
-    if ($info) {
-      requestFileThumbnailDownload($info.id, $info.dataKey)
+    if (info.dataKey) {
+      requestFileThumbnailDownload(info.id, info.dataKey)
         .then((thumbnailUrl) => {
           thumbnail = thumbnailUrl ?? undefined;
         })
@@ -47,13 +46,11 @@
   });
 </script>
 
-{#if $info}
-  <ActionEntryButton
-    class="h-12"
-    onclick={openFile}
-    actionButtonIcon={onRemoveClick && IconClose}
-    onActionButtonClick={removeFile}
-  >
-    <DirectoryEntryLabel type="file" {thumbnail} name={$info.name} />
-  </ActionEntryButton>
-{/if}
+<ActionEntryButton
+  class="h-12"
+  onclick={openFile}
+  actionButtonIcon={onRemoveClick && IconClose}
+  onActionButtonClick={removeFile}
+>
+  <DirectoryEntryLabel type="file" {thumbnail} name={info.name} />
+</ActionEntryButton>

src/lib/components/organisms/Gallery.svelte

@@ -1,134 +0,0 @@
-<script lang="ts">
-  import { untrack } from "svelte";
-  import { get, type Writable } from "svelte/store";
-  import { FileThumbnailButton, RowVirtualizer } from "$lib/components/atoms";
-  import type { FileInfo } from "$lib/modules/filesystem";
-  import { formatDate, formatDateSortable, SortBy, sortEntries } from "$lib/utils";
-
-  interface Props {
-    files: Writable<FileInfo | null>[];
-    onFileClick?: (file: FileInfo) => void;
-  }
-
-  let { files, onFileClick }: Props = $props();
-
-  type FileEntry =
-    | { date?: undefined; contentType?: undefined; info: Writable<FileInfo | null> }
-    | { date: Date; contentType: string; info: Writable<FileInfo | null> };
-  type Row =
-    | { type: "header"; label: string }
-    | { type: "items"; items: FileEntry[]; isLast: boolean };
-
-  let filesWithDate: FileEntry[] = $state([]);
-  let rows: Row[] = $state([]);
-
-  $effect(() => {
-    filesWithDate = files.map((file) => {
-      const info = get(file);
-      if (info) {
-        return {
-          date: info.createdAt ?? info.lastModifiedAt,
-          contentType: info.contentType,
-          info: file,
-        };
-      } else {
-        return { info: file };
-      }
-    });
-
-    const buildRows = () => {
-      const map = new Map<string, FileEntry[]>();
-
-      for (const file of filesWithDate) {
-        if (
-          !file.date ||
-          !(file.contentType.startsWith("image/") || file.contentType.startsWith("video/"))
-        ) {
-          continue;
-        }
-
-        const date = formatDateSortable(file.date);
-        const entries = map.get(date) ?? [];
-        entries.push(file);
-        map.set(date, entries);
-      }
-
-      const newRows: Row[] = [];
-      const sortedDates = Array.from(map.keys()).sort((a, b) => b.localeCompare(a));
-      for (const date of sortedDates) {
-        const entries = map.get(date)!;
-        sortEntries(entries, SortBy.DATE_DESC);
-
-        newRows.push({
-          type: "header",
-          label: formatDate(entries[0]!.date!),
-        });
-
-        for (let i = 0; i < entries.length; i += 4) {
-          newRows.push({
-            type: "items",
-            items: entries.slice(i, i + 4),
-            isLast: i + 4 >= entries.length,
-          });
-        }
-      }
-
-      rows = newRows;
-    };
-    return untrack(() => {
-      buildRows();
-
-      const unsubscribes = filesWithDate.map((file) =>
-        file.info.subscribe((value) => {
-          const newDate = value?.createdAt ?? value?.lastModifiedAt;
-          const newContentType = value?.contentType;
-          if (file.date?.getTime() === newDate?.getTime() && file.contentType === newContentType) {
-            return;
-          }
-
-          file.date = newDate;
-          file.contentType = newContentType;
-          buildRows();
-        }),
-      );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
-</script>
-
-<RowVirtualizer
-  count={rows.length}
-  itemHeight={(index) =>
-    rows[index]!.type === "header"
-      ? 28
-      : Math.ceil(rows[index]!.items.length / 4) * 181 +
-        (Math.ceil(rows[index]!.items.length / 4) - 1) * 4 +
-        16}
-  class="flex flex-grow flex-col"
->
-  {#snippet item(index)}
-    {@const row = rows[index]!}
-    {#if row.type === "header"}
-      <p class="pb-2 text-sm font-medium">{row.label}</p>
-    {:else}
-      <div class={["grid grid-cols-4 gap-x-1", row.isLast ? "pb-4" : "pb-1"]}>
-        {#each row.items as { info }}
-          <FileThumbnailButton {info} onclick={onFileClick} />
-        {/each}
-      </div>
-    {/if}
-  {/snippet}
-  {#snippet placeholder()}
-    <div class="flex h-full flex-grow items-center justify-center">
-      <p class="text-gray-500">
-        {#if files.length === 0}
-          업로드된 파일이 없어요.
-        {:else if filesWithDate.length === 0}
-          파일 목록을 불러오고 있어요.
-        {:else}
-          사진 또는 동영상이 없어요.
-        {/if}
-      </p>
-    </div>
-  {/snippet}
-</RowVirtualizer>

src/lib/components/organisms/index.ts

@@ -1,4 +1,3 @@
 export * from "./Category";
 export { default as Category } from "./Category";
-export { default as Gallery } from "./Gallery.svelte";
 export * from "./modals";

src/lib/hooks/callApi.ts

@@ -0,0 +1,24 @@
+interface FetchOptions {
+  fetch?: typeof fetch;
+  signal?: AbortSignal;
+}
+
+export const callGetApi = async (
+  input: RequestInfo,
+  { fetch = globalThis.fetch, signal }: FetchOptions = {},
+) => {
+  return await fetch(input, { method: "GET", signal });
+};
+
+export const callPostApi = async <T>(
+  input: RequestInfo,
+  payload?: T,
+  { fetch = globalThis.fetch, signal }: FetchOptions = {},
+) => {
+  return await fetch(input, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: payload ? JSON.stringify(payload) : undefined,
+    signal,
+  });
+};

src/lib/hooks/index.ts

@@ -0,0 +1,2 @@
+export * from "./callApi";
+export * from "./gotoStateful";

src/lib/indexedDB/filesystem.ts

@@ -62,6 +62,10 @@ export const storeDirectoryInfo = async (directoryInfo: DirectoryInfo) => {
   await filesystem.directory.put(directoryInfo);
 };
 
+export const updateDirectoryInfo = async (id: number, changes: { name?: string }) => {
+  await filesystem.directory.update(id, changes);
+};
+
 export const deleteDirectoryInfo = async (id: number) => {
   await filesystem.directory.delete(id);
 };
@@ -82,6 +86,10 @@ export const storeFileInfo = async (fileInfo: FileInfo) => {
   await filesystem.file.put(fileInfo);
 };
 
+export const updateFileInfo = async (id: number, changes: { name?: string }) => {
+  await filesystem.file.update(id, changes);
+};
+
 export const deleteFileInfo = async (id: number) => {
   await filesystem.file.delete(id);
 };
@@ -98,7 +106,10 @@ export const storeCategoryInfo = async (categoryInfo: CategoryInfo) => {
   await filesystem.category.put(categoryInfo);
 };
 
-export const updateCategoryInfo = async (id: number, changes: { isFileRecursive?: boolean }) => {
+export const updateCategoryInfo = async (
+  id: number,
+  changes: { name?: string; isFileRecursive?: boolean },
+) => {
   await filesystem.category.update(id, changes);
 };
 

src/lib/modules/file/upload.ts

@@ -5,6 +5,7 @@ import { writable, type Writable } from "svelte/store";
 import {
   encodeToBase64,
   generateDataKey,
+  makeAESKeyNonextractable,
   wrapDataKey,
   encryptData,
   encryptString,
@@ -13,6 +14,8 @@ import {
 } from "$lib/modules/crypto";
 import { generateThumbnail } from "$lib/modules/thumbnail";
 import type {
+  DuplicateFileScanRequest,
+  DuplicateFileScanResponse,
   FileThumbnailUploadRequest,
   FileUploadRequest,
   FileUploadResponse,
@@ -23,17 +26,18 @@ import {
   type HmacSecret,
   type FileUploadStatus,
 } from "$lib/stores";
-import { trpc } from "$trpc/client";
 
 const requestDuplicateFileScan = limitFunction(
   async (file: File, hmacSecret: HmacSecret, onDuplicate: () => Promise<boolean>) => {
     const fileBuffer = await file.arrayBuffer();
     const fileSigned = encodeToBase64(await signMessageHmac(fileBuffer, hmacSecret.secret));
 
-    const files = await trpc().file.listByHash.query({
+    const res = await axios.post("/api/file/scanDuplicates", {
       hskVersion: hmacSecret.version,
       contentHmac: fileSigned,
-    });
+    } satisfies DuplicateFileScanRequest);
+    const { files }: DuplicateFileScanResponse = res.data;
+
     if (files.length === 0 || (await onDuplicate())) {
       return { fileBuffer, fileSigned };
     } else {
@@ -115,12 +119,14 @@ const encryptFile = limitFunction(
     });
 
     return {
+      dataKey: await makeAESKeyNonextractable(dataKey),
       dataKeyWrapped,
       dataKeyVersion,
       fileType,
       fileEncrypted,
       fileEncryptedHash,
       nameEncrypted,
+      createdAt,
       createdAtEncrypted,
       lastModifiedAtEncrypted,
       thumbnail: thumbnailEncrypted && { plaintext: thumbnailBuffer, ...thumbnailEncrypted },
@@ -173,9 +179,7 @@ export const uploadFile = async (
   hmacSecret: HmacSecret,
   masterKey: MasterKey,
   onDuplicate: () => Promise<boolean>,
-): Promise<
-  { fileId: number; fileBuffer: ArrayBuffer; thumbnailBuffer?: ArrayBuffer } | undefined
-> => {
+) => {
   const status = writable<FileUploadStatus>({
     name: file.name,
     parentId,
@@ -205,12 +209,14 @@ export const uploadFile = async (
     }
 
     const {
+      dataKey,
       dataKeyWrapped,
       dataKeyVersion,
       fileType,
       fileEncrypted,
       fileEncryptedHash,
       nameEncrypted,
+      createdAt,
       createdAtEncrypted,
       lastModifiedAtEncrypted,
       thumbnail,
@@ -253,7 +259,16 @@ export const uploadFile = async (
     }
 
     const { fileId } = await requestFileUpload(status, form, thumbnailForm);
-    return { fileId, fileBuffer, thumbnailBuffer: thumbnail?.plaintext };
+    return {
+      fileId,
+      fileDataKey: dataKey,
+      fileDataKeyVersion: dataKeyVersion,
+      fileType,
+      fileEncryptedIv: fileEncrypted.iv,
+      fileCreatedAt: createdAt,
+      fileBuffer,
+      thumbnailBuffer: thumbnail?.plaintext,
+    };
   } catch (e) {
     status.update((value) => {
       value.status = "error";

src/lib/modules/filesystem.ts

@@ -1,369 +0,0 @@
-import { get, writable, type Writable } from "svelte/store";
-import {
-  getDirectoryInfos as getDirectoryInfosFromIndexedDB,
-  getDirectoryInfo as getDirectoryInfoFromIndexedDB,
-  storeDirectoryInfo,
-  deleteDirectoryInfo,
-  getFileInfos as getFileInfosFromIndexedDB,
-  getFileInfo as getFileInfoFromIndexedDB,
-  storeFileInfo,
-  deleteFileInfo,
-  getCategoryInfos as getCategoryInfosFromIndexedDB,
-  getCategoryInfo as getCategoryInfoFromIndexedDB,
-  storeCategoryInfo,
-  updateCategoryInfo as updateCategoryInfoInIndexedDB,
-  deleteCategoryInfo,
-  type DirectoryId,
-  type CategoryId,
-} from "$lib/indexedDB";
-import { unwrapDataKey, decryptString } from "$lib/modules/crypto";
-import { trpc, isTRPCClientError } from "$trpc/client";
-
-export type DirectoryInfo =
-  | {
-      id: "root";
-      parentId?: undefined;
-      dataKey?: undefined;
-      dataKeyVersion?: undefined;
-      name?: undefined;
-      subDirectoryIds: number[];
-      fileIds: number[];
-    }
-  | {
-      id: number;
-      parentId: DirectoryId;
-      dataKey?: CryptoKey;
-      dataKeyVersion?: Date;
-      name: string;
-      subDirectoryIds: number[];
-      fileIds: number[];
-    };
-
-export interface FileInfo {
-  id: number;
-  parentId: DirectoryId;
-  dataKey?: CryptoKey;
-  dataKeyVersion?: Date;
-  contentType: string;
-  contentIv?: string;
-  name: string;
-  createdAt?: Date;
-  lastModifiedAt: Date;
-  categoryIds: number[];
-}
-
-export type CategoryInfo =
-  | {
-      id: "root";
-      dataKey?: undefined;
-      dataKeyVersion?: undefined;
-      name?: undefined;
-      subCategoryIds: number[];
-      files?: undefined;
-      isFileRecursive?: undefined;
-    }
-  | {
-      id: number;
-      dataKey?: CryptoKey;
-      dataKeyVersion?: Date;
-      name: string;
-      subCategoryIds: number[];
-      files: { id: number; isRecursive: boolean }[];
-      isFileRecursive: boolean;
-    };
-
-const directoryInfoStore = new Map<DirectoryId, Writable<DirectoryInfo | null>>();
-const fileInfoStore = new Map<number, Writable<FileInfo | null>>();
-const categoryInfoStore = new Map<CategoryId, Writable<CategoryInfo | null>>();
-
-const fetchDirectoryInfoFromIndexedDB = async (
-  id: DirectoryId,
-  info: Writable<DirectoryInfo | null>,
-) => {
-  if (get(info)) return;
-
-  const [directory, subDirectories, files] = await Promise.all([
-    id !== "root" ? getDirectoryInfoFromIndexedDB(id) : undefined,
-    getDirectoryInfosFromIndexedDB(id),
-    getFileInfosFromIndexedDB(id),
-  ]);
-  const subDirectoryIds = subDirectories.map(({ id }) => id);
-  const fileIds = files.map(({ id }) => id);
-
-  if (id === "root") {
-    info.set({ id, subDirectoryIds, fileIds });
-  } else {
-    if (!directory) return;
-    info.set({
-      id,
-      parentId: directory.parentId,
-      name: directory.name,
-      subDirectoryIds,
-      fileIds,
-    });
-  }
-};
-
-const fetchDirectoryInfoFromServer = async (
-  id: DirectoryId,
-  info: Writable<DirectoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  let data;
-  try {
-    data = await trpc().directory.get.query({ id });
-  } catch (e) {
-    if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
-      info.set(null);
-      await deleteDirectoryInfo(id as number);
-      return;
-    }
-    throw new Error("Failed to fetch directory information");
-  }
-
-  const { metadata, subDirectories: subDirectoryIds, files: fileIds } = data;
-
-  if (id === "root") {
-    info.set({ id, subDirectoryIds, fileIds });
-  } else {
-    const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
-    const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
-
-    info.set({
-      id,
-      parentId: metadata!.parent,
-      dataKey,
-      dataKeyVersion: new Date(metadata!.dekVersion),
-      name,
-      subDirectoryIds,
-      fileIds,
-    });
-    await storeDirectoryInfo({ id, parentId: metadata!.parent, name });
-  }
-};
-
-const fetchDirectoryInfo = async (
-  id: DirectoryId,
-  info: Writable<DirectoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  await fetchDirectoryInfoFromIndexedDB(id, info);
-  await fetchDirectoryInfoFromServer(id, info, masterKey);
-};
-
-export const getDirectoryInfo = (id: DirectoryId, masterKey: CryptoKey) => {
-  // TODO: MEK rotation
-
-  let info = directoryInfoStore.get(id);
-  if (!info) {
-    info = writable(null);
-    directoryInfoStore.set(id, info);
-  }
-
-  fetchDirectoryInfo(id, info, masterKey); // Intended
-  return info;
-};
-
-const fetchFileInfoFromIndexedDB = async (id: number, info: Writable<FileInfo | null>) => {
-  if (get(info)) return;
-
-  const file = await getFileInfoFromIndexedDB(id);
-  if (!file) return;
-
-  info.set(file);
-};
-
-const decryptDate = async (ciphertext: string, iv: string, dataKey: CryptoKey) => {
-  return new Date(parseInt(await decryptString(ciphertext, iv, dataKey), 10));
-};
-
-const fetchFileInfoFromServer = async (
-  id: number,
-  info: Writable<FileInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  let metadata;
-  try {
-    metadata = await trpc().file.get.query({ id });
-  } catch (e) {
-    if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
-      info.set(null);
-      await deleteFileInfo(id);
-      return;
-    }
-    throw new Error("Failed to fetch file information");
-  }
-  const { dataKey } = await unwrapDataKey(metadata.dek, masterKey);
-
-  const name = await decryptString(metadata.name, metadata.nameIv, dataKey);
-  const createdAt =
-    metadata.createdAt && metadata.createdAtIv
-      ? await decryptDate(metadata.createdAt, metadata.createdAtIv, dataKey)
-      : undefined;
-  const lastModifiedAt = await decryptDate(
-    metadata.lastModifiedAt,
-    metadata.lastModifiedAtIv,
-    dataKey,
-  );
-
-  info.set({
-    id,
-    parentId: metadata.parent,
-    dataKey,
-    dataKeyVersion: new Date(metadata.dekVersion),
-    contentType: metadata.contentType,
-    contentIv: metadata.contentIv,
-    name,
-    createdAt,
-    lastModifiedAt,
-    categoryIds: metadata.categories,
-  });
-  await storeFileInfo({
-    id,
-    parentId: metadata.parent,
-    name,
-    contentType: metadata.contentType,
-    createdAt,
-    lastModifiedAt,
-    categoryIds: metadata.categories,
-  });
-};
-
-const fetchFileInfo = async (id: number, info: Writable<FileInfo | null>, masterKey: CryptoKey) => {
-  await fetchFileInfoFromIndexedDB(id, info);
-  await fetchFileInfoFromServer(id, info, masterKey);
-};
-
-export const getFileInfo = (fileId: number, masterKey: CryptoKey) => {
-  // TODO: MEK rotation
-
-  let info = fileInfoStore.get(fileId);
-  if (!info) {
-    info = writable(null);
-    fileInfoStore.set(fileId, info);
-  }
-
-  fetchFileInfo(fileId, info, masterKey); // Intended
-  return info;
-};
-
-const fetchCategoryInfoFromIndexedDB = async (
-  id: CategoryId,
-  info: Writable<CategoryInfo | null>,
-) => {
-  if (get(info)) return;
-
-  const [category, subCategories] = await Promise.all([
-    id !== "root" ? getCategoryInfoFromIndexedDB(id) : undefined,
-    getCategoryInfosFromIndexedDB(id),
-  ]);
-  const subCategoryIds = subCategories.map(({ id }) => id);
-
-  if (id === "root") {
-    info.set({ id, subCategoryIds });
-  } else {
-    if (!category) return;
-    info.set({
-      id,
-      name: category.name,
-      subCategoryIds,
-      files: category.files,
-      isFileRecursive: category.isFileRecursive,
-    });
-  }
-};
-
-const fetchCategoryInfoFromServer = async (
-  id: CategoryId,
-  info: Writable<CategoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  let data;
-  try {
-    data = await trpc().category.get.query({ id });
-  } catch (e) {
-    if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
-      info.set(null);
-      await deleteCategoryInfo(id as number);
-      return;
-    }
-    throw new Error("Failed to fetch category information");
-  }
-
-  const { metadata, subCategories } = data;
-
-  if (id === "root") {
-    info.set({ id, subCategoryIds: subCategories });
-  } else {
-    const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
-    const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
-
-    let files;
-    try {
-      files = await trpc().category.files.query({ id, recurse: true });
-    } catch {
-      throw new Error("Failed to fetch category files");
-    }
-
-    const filesMapped = files.map(({ file, isRecursive }) => ({ id: file, isRecursive }));
-    let isFileRecursive: boolean | undefined = undefined;
-
-    info.update((value) => {
-      const newValue = {
-        isFileRecursive: false,
-        ...value,
-        id,
-        dataKey,
-        dataKeyVersion: new Date(metadata!.dekVersion),
-        name,
-        subCategoryIds: subCategories,
-        files: filesMapped,
-      };
-      isFileRecursive = newValue.isFileRecursive;
-      return newValue;
-    });
-    await storeCategoryInfo({
-      id,
-      parentId: metadata!.parent,
-      name,
-      files: filesMapped,
-      isFileRecursive: isFileRecursive!,
-    });
-  }
-};
-
-const fetchCategoryInfo = async (
-  id: CategoryId,
-  info: Writable<CategoryInfo | null>,
-  masterKey: CryptoKey,
-) => {
-  await fetchCategoryInfoFromIndexedDB(id, info);
-  await fetchCategoryInfoFromServer(id, info, masterKey);
-};
-
-export const getCategoryInfo = (categoryId: CategoryId, masterKey: CryptoKey) => {
-  // TODO: MEK rotation
-
-  let info = categoryInfoStore.get(categoryId);
-  if (!info) {
-    info = writable(null);
-    categoryInfoStore.set(categoryId, info);
-  }
-
-  fetchCategoryInfo(categoryId, info, masterKey); // Intended
-  return info;
-};
-
-export const updateCategoryInfo = async (
-  categoryId: number,
-  changes: { isFileRecursive?: boolean },
-) => {
-  await updateCategoryInfoInIndexedDB(categoryId, changes);
-  categoryInfoStore.get(categoryId)?.update((value) => {
-    if (!value) return value;
-    if (changes.isFileRecursive !== undefined) {
-      value.isFileRecursive = changes.isFileRecursive;
-    }
-    return value;
-  });
-};

src/lib/modules/filesystem2/category.ts

@@ -0,0 +1,294 @@
+import { useQueryClient, createQuery, createMutation } from "@tanstack/svelte-query";
+import { callGetApi, callPostApi } from "$lib/hooks";
+import {
+  getCategoryInfos as getCategoryInfosFromIndexedDB,
+  getCategoryInfo as getCategoryInfoFromIndexedDB,
+  storeCategoryInfo,
+  updateCategoryInfo,
+  deleteCategoryInfo,
+  type CategoryId,
+} from "$lib/indexedDB";
+import {
+  generateDataKey,
+  wrapDataKey,
+  unwrapDataKey,
+  encryptString,
+  decryptString,
+} from "$lib/modules/crypto";
+import type {
+  CategoryInfoResponse,
+  CategoryFileListResponse,
+  CategoryRenameRequest,
+  CategoryCreateRequest,
+  CategoryCreateResponse,
+} from "$lib/server/schemas";
+import type { MasterKey } from "$lib/stores";
+
+export type CategoryInfo =
+  | {
+      id: "root";
+      dataKey?: undefined;
+      dataKeyVersion?: undefined;
+      name?: undefined;
+      subCategoryIds: number[];
+      files?: undefined;
+      isFileRecursive?: undefined;
+    }
+  | {
+      id: number;
+      dataKey?: CryptoKey;
+      dataKeyVersion?: Date;
+      name: string;
+      subCategoryIds: number[];
+      files: { id: number; isRecursive: boolean }[];
+      isFileRecursive: boolean;
+    };
+export type SubCategoryInfo = CategoryInfo & { id: number };
+
+let temporaryIdCounter = -1;
+
+const getInitialCategoryInfo = async (id: CategoryId) => {
+  const [category, subCategories] = await Promise.all([
+    id !== "root" ? getCategoryInfoFromIndexedDB(id) : undefined,
+    getCategoryInfosFromIndexedDB(id),
+  ]);
+  const subCategoryIds = subCategories.map(({ id }) => id);
+
+  if (id === "root") {
+    return { id, subCategoryIds };
+  } else if (category) {
+    return {
+      id,
+      name: category.name,
+      subCategoryIds,
+      files: category.files,
+      isFileRecursive: category.isFileRecursive,
+    };
+  }
+  return undefined;
+};
+
+export const getCategoryInfo = (id: CategoryId, masterKey: CryptoKey) => {
+  return createQuery<CategoryInfo>({
+    queryKey: ["category", id],
+    queryFn: async ({ client, signal }) => {
+      if (!client.getQueryData<CategoryInfo>(["category", id])) {
+        const initialInfo = await getInitialCategoryInfo(id);
+        if (initialInfo) {
+          setTimeout(() => client.invalidateQueries({ queryKey: ["category", id] }), 0);
+          return initialInfo;
+        }
+      }
+
+      const res = await callGetApi(`/api/category/${id}`, { signal }); // TODO: 404
+      const { metadata, subCategories }: CategoryInfoResponse = await res.json();
+
+      if (id === "root") {
+        return { id, subCategoryIds: subCategories };
+      } else {
+        const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
+        const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
+
+        const res = await callGetApi(`/api/category/${id}/file/list?recurse=true`); // TODO: Error Handling
+        const { files }: CategoryFileListResponse = await res.json();
+        const filesMapped = files.map(({ file, isRecursive }) => ({ id: file, isRecursive }));
+
+        const prevInfo = client.getQueryData<CategoryInfo>(["category", id]);
+        await storeCategoryInfo({
+          id,
+          parentId: metadata!.parent,
+          name,
+          files: filesMapped,
+          isFileRecursive: prevInfo?.isFileRecursive ?? false,
+        });
+        return {
+          id,
+          dataKey,
+          dataKeyVersion: new Date(metadata!.dekVersion),
+          name,
+          subCategoryIds: subCategories,
+          files: filesMapped,
+          isFileRecursive: prevInfo?.isFileRecursive ?? false,
+        };
+      }
+    },
+    staleTime: Infinity,
+  });
+};
+
+export type CategoryInfoStore = ReturnType<typeof getCategoryInfo>;
+
+export const useCategoryCreation = (parentId: CategoryId, masterKey: MasterKey) => {
+  const queryClient = useQueryClient();
+  return createMutation<void, Error, { name: string }, { tempId: number }>({
+    mutationFn: async ({ name }) => {
+      const { dataKey, dataKeyVersion } = await generateDataKey();
+      const nameEncrypted = await encryptString(name, dataKey);
+
+      const res = await callPostApi<CategoryCreateRequest>("/api/category/create", {
+        parent: parentId,
+        mekVersion: masterKey.version,
+        dek: await wrapDataKey(dataKey, masterKey.key),
+        dekVersion: dataKeyVersion.toISOString(),
+        name: nameEncrypted.ciphertext,
+        nameIv: nameEncrypted.iv,
+      });
+      if (!res.ok) throw new Error("Failed to create category");
+
+      const { category: id }: CategoryCreateResponse = await res.json();
+      queryClient.setQueryData<CategoryInfo>(["category", id], {
+        id,
+        name,
+        dataKey,
+        dataKeyVersion,
+        subCategoryIds: [],
+        files: [],
+        isFileRecursive: false,
+      });
+      await storeCategoryInfo({ id, parentId, name, files: [], isFileRecursive: false });
+    },
+    onMutate: async ({ name }) => {
+      const tempId = temporaryIdCounter--;
+      queryClient.setQueryData<CategoryInfo>(["category", tempId], {
+        id: tempId,
+        name,
+        subCategoryIds: [],
+        files: [],
+        isFileRecursive: false,
+      });
+
+      await queryClient.cancelQueries({ queryKey: ["category", parentId] });
+      queryClient.setQueryData<CategoryInfo>(["category", parentId], (prevParentInfo) => {
+        if (!prevParentInfo) return;
+        return {
+          ...prevParentInfo,
+          subCategoryIds: [...prevParentInfo.subCategoryIds, tempId],
+        };
+      });
+
+      return { tempId };
+    },
+    onError: (_error, _variables, context) => {
+      if (context) {
+        queryClient.setQueryData<CategoryInfo>(["category", parentId], (prevParentInfo) => {
+          if (!prevParentInfo) return;
+          return {
+            ...prevParentInfo,
+            subCategoryIds: prevParentInfo.subCategoryIds.filter((id) => id !== context.tempId),
+          };
+        });
+      }
+    },
+    onSettled: () => {
+      queryClient.invalidateQueries({ queryKey: ["category", parentId] });
+    },
+  });
+};
+
+export const useCategoryRename = () => {
+  const queryClient = useQueryClient();
+  return createMutation<
+    void,
+    Error,
+    {
+      id: number;
+      dataKey: CryptoKey;
+      dataKeyVersion: Date;
+      newName: string;
+    },
+    { oldName: string | undefined }
+  >({
+    mutationFn: async ({ id, dataKey, dataKeyVersion, newName }) => {
+      const newNameEncrypted = await encryptString(newName, dataKey);
+      const res = await callPostApi<CategoryRenameRequest>(`/api/category/${id}/rename`, {
+        dekVersion: dataKeyVersion.toISOString(),
+        name: newNameEncrypted.ciphertext,
+        nameIv: newNameEncrypted.iv,
+      });
+      if (!res.ok) throw new Error("Failed to rename category");
+
+      await updateCategoryInfo(id, { name: newName });
+    },
+    onMutate: async ({ id, newName }) => {
+      await queryClient.cancelQueries({ queryKey: ["category", id] });
+
+      const prevInfo = queryClient.getQueryData<SubCategoryInfo>(["category", id]);
+      if (prevInfo) {
+        queryClient.setQueryData<CategoryInfo>(["category", id], {
+          ...prevInfo,
+          name: newName,
+        });
+      }
+
+      return { oldName: prevInfo?.name };
+    },
+    onError: (_error, { id }, context) => {
+      if (context?.oldName) {
+        queryClient.setQueryData<SubCategoryInfo>(["category", id], (prevInfo) => {
+          if (!prevInfo) return;
+          return { ...prevInfo, name: context.oldName! };
+        });
+      }
+    },
+    onSettled: (_data, _error, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ["category", id] });
+    },
+  });
+};
+
+export const useCategoryDeletion = (parentId: CategoryId) => {
+  const queryClient = useQueryClient();
+  return createMutation<void, Error, { id: number }, {}>({
+    mutationFn: async ({ id }) => {
+      const res = await callPostApi(`/api/category/${id}/delete`);
+      if (!res.ok) throw new Error("Failed to delete category");
+
+      await deleteCategoryInfo(id);
+
+      // TODO: Update FileInfo
+    },
+    onMutate: async ({ id }) => {
+      await queryClient.cancelQueries({ queryKey: ["category", parentId] });
+      queryClient.setQueryData<CategoryInfo>(["category", parentId], (prevParentInfo) => {
+        if (!prevParentInfo) return;
+        return {
+          ...prevParentInfo,
+          subCategoryIds: prevParentInfo.subCategoryIds.filter((categoryId) => categoryId !== id),
+        };
+      });
+      return {};
+    },
+    onError: (_error, { id }, context) => {
+      if (context) {
+        queryClient.setQueryData<CategoryInfo>(["category", parentId], (prevParentInfo) => {
+          if (!prevParentInfo) return;
+          return {
+            ...prevParentInfo,
+            subCategoryIds: [...prevParentInfo.subCategoryIds, id],
+          };
+        });
+      }
+    },
+    onSettled: () => {
+      queryClient.invalidateQueries({ queryKey: ["category", parentId] });
+    },
+  });
+};
+
+export const useCategoryFileRecursionToggle = () => {
+  const queryClient = useQueryClient();
+  return createMutation<void, Error, { id: number; isFileRecursive: boolean }, {}>({
+    mutationFn: async ({ id, isFileRecursive }) => {
+      await updateCategoryInfo(id, { isFileRecursive });
+    },
+    onMutate: async ({ id, isFileRecursive }) => {
+      const prevInfo = queryClient.getQueryData<SubCategoryInfo>(["category", id]);
+      if (prevInfo) {
+        queryClient.setQueryData<CategoryInfo>(["category", id], {
+          ...prevInfo,
+          isFileRecursive,
+        });
+      }
+    },
+  });
+};

src/lib/modules/filesystem2/directory.ts

@@ -0,0 +1,267 @@
+import { useQueryClient, createQuery, createMutation } from "@tanstack/svelte-query";
+import { callGetApi, callPostApi } from "$lib/hooks";
+import {
+  getDirectoryInfos as getDirectoryInfosFromIndexedDB,
+  getDirectoryInfo as getDirectoryInfoFromIndexedDB,
+  storeDirectoryInfo,
+  updateDirectoryInfo,
+  deleteDirectoryInfo,
+  getFileInfos as getFileInfosFromIndexedDB,
+  deleteFileInfo,
+  type DirectoryId,
+} from "$lib/indexedDB";
+import {
+  generateDataKey,
+  wrapDataKey,
+  unwrapDataKey,
+  encryptString,
+  decryptString,
+} from "$lib/modules/crypto";
+import type {
+  DirectoryInfoResponse,
+  DirectoryDeleteResponse,
+  DirectoryRenameRequest,
+  DirectoryCreateRequest,
+  DirectoryCreateResponse,
+} from "$lib/server/schemas";
+import type { MasterKey } from "$lib/stores";
+
+export type DirectoryInfo =
+  | {
+      id: "root";
+      dataKey?: undefined;
+      dataKeyVersion?: undefined;
+      name?: undefined;
+      subDirectoryIds: number[];
+      fileIds: number[];
+    }
+  | {
+      id: number;
+      dataKey?: CryptoKey;
+      dataKeyVersion?: Date;
+      name: string;
+      subDirectoryIds: number[];
+      fileIds: number[];
+    };
+export type SubDirectoryInfo = DirectoryInfo & { id: number };
+
+let temporaryIdCounter = -1;
+
+const getInitialDirectoryInfo = async (id: DirectoryId) => {
+  const [directory, subDirectories, files] = await Promise.all([
+    id !== "root" ? getDirectoryInfoFromIndexedDB(id) : undefined,
+    getDirectoryInfosFromIndexedDB(id),
+    getFileInfosFromIndexedDB(id),
+  ]);
+  const subDirectoryIds = subDirectories.map(({ id }) => id);
+  const fileIds = files.map(({ id }) => id);
+
+  if (id === "root") {
+    return { id, subDirectoryIds, fileIds };
+  } else if (directory) {
+    return { id, name: directory.name, subDirectoryIds, fileIds };
+  }
+  return undefined;
+};
+
+export const getDirectoryInfo = (id: DirectoryId, masterKey: CryptoKey) => {
+  return createQuery<DirectoryInfo>({
+    queryKey: ["directory", id],
+    queryFn: async ({ client, signal }) => {
+      if (!client.getQueryData(["directory", id])) {
+        const initialInfo = await getInitialDirectoryInfo(id);
+        if (initialInfo) {
+          setTimeout(() => client.invalidateQueries({ queryKey: ["directory", id] }), 0);
+          return initialInfo;
+        }
+      }
+
+      const res = await callGetApi(`/api/directory/${id}`, { signal }); // TODO: 404
+      const {
+        metadata,
+        subDirectories: subDirectoryIds,
+        files: fileIds,
+      }: DirectoryInfoResponse = await res.json();
+
+      if (id === "root") {
+        return { id, subDirectoryIds, fileIds };
+      } else {
+        const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
+        const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
+        await storeDirectoryInfo({ id, parentId: metadata!.parent, name });
+        return {
+          id,
+          dataKey,
+          dataKeyVersion: new Date(metadata!.dekVersion),
+          name,
+          subDirectoryIds,
+          fileIds,
+        };
+      }
+    },
+    staleTime: Infinity,
+  });
+};
+
+export type DirectoryInfoStore = ReturnType<typeof getDirectoryInfo>;
+
+export const useDirectoryCreation = (parentId: DirectoryId, masterKey: MasterKey) => {
+  const queryClient = useQueryClient();
+  return createMutation<void, Error, { name: string }, { tempId: number }>({
+    mutationFn: async ({ name }) => {
+      const { dataKey, dataKeyVersion } = await generateDataKey();
+      const nameEncrypted = await encryptString(name, dataKey);
+
+      const res = await callPostApi<DirectoryCreateRequest>(`/api/directory/create`, {
+        parent: parentId,
+        mekVersion: masterKey.version,
+        dek: await wrapDataKey(dataKey, masterKey.key),
+        dekVersion: dataKeyVersion.toISOString(),
+        name: nameEncrypted.ciphertext,
+        nameIv: nameEncrypted.iv,
+      });
+      if (!res.ok) throw new Error("Failed to create directory");
+
+      const { directory: id }: DirectoryCreateResponse = await res.json();
+      queryClient.setQueryData<DirectoryInfo>(["directory", id], {
+        id,
+        name,
+        dataKey,
+        dataKeyVersion,
+        subDirectoryIds: [],
+        fileIds: [],
+      });
+      await storeDirectoryInfo({ id, parentId, name });
+    },
+    onMutate: async ({ name }) => {
+      const tempId = temporaryIdCounter--;
+      queryClient.setQueryData<DirectoryInfo>(["directory", tempId], {
+        id: tempId,
+        name,
+        subDirectoryIds: [],
+        fileIds: [],
+      });
+
+      await queryClient.cancelQueries({ queryKey: ["directory", parentId] });
+      queryClient.setQueryData<DirectoryInfo>(["directory", parentId], (prevParentInfo) => {
+        if (!prevParentInfo) return undefined;
+        return {
+          ...prevParentInfo,
+          subDirectoryIds: [...prevParentInfo.subDirectoryIds, tempId],
+        };
+      });
+
+      return { tempId };
+    },
+    onError: (_error, _variables, context) => {
+      if (context) {
+        queryClient.setQueryData<DirectoryInfo>(["directory", parentId], (prevParentInfo) => {
+          if (!prevParentInfo) return undefined;
+          return {
+            ...prevParentInfo,
+            subDirectoryIds: prevParentInfo.subDirectoryIds.filter((id) => id !== context.tempId),
+          };
+        });
+      }
+    },
+    onSettled: () => {
+      queryClient.invalidateQueries({ queryKey: ["directory", parentId] });
+    },
+  });
+};
+
+export const useDirectoryRename = () => {
+  const queryClient = useQueryClient();
+  return createMutation<
+    void,
+    Error,
+    {
+      id: number;
+      dataKey: CryptoKey;
+      dataKeyVersion: Date;
+      newName: string;
+    },
+    { oldName: string | undefined }
+  >({
+    mutationFn: async ({ id, dataKey, dataKeyVersion, newName }) => {
+      const newNameEncrypted = await encryptString(newName, dataKey);
+      const res = await callPostApi<DirectoryRenameRequest>(`/api/directory/${id}/rename`, {
+        dekVersion: dataKeyVersion.toISOString(),
+        name: newNameEncrypted.ciphertext,
+        nameIv: newNameEncrypted.iv,
+      });
+      if (!res.ok) throw new Error("Failed to rename directory");
+
+      await updateDirectoryInfo(id, { name: newName });
+    },
+    onMutate: async ({ id, newName }) => {
+      await queryClient.cancelQueries({ queryKey: ["directory", id] });
+
+      const prevInfo = queryClient.getQueryData<SubDirectoryInfo>(["directory", id]);
+      if (prevInfo) {
+        queryClient.setQueryData<DirectoryInfo>(["directory", id], {
+          ...prevInfo,
+          name: newName,
+        });
+      }
+
+      return { oldName: prevInfo?.name };
+    },
+    onError: (_error, { id }, context) => {
+      if (context?.oldName) {
+        queryClient.setQueryData<SubDirectoryInfo>(["directory", id], (prevInfo) => {
+          if (!prevInfo) return undefined;
+          return { ...prevInfo, name: context.oldName! };
+        });
+      }
+    },
+    onSettled: (_data, _error, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ["directory", id] });
+    },
+  });
+};
+
+export const useDirectoryDeletion = (parentId: DirectoryId) => {
+  const queryClient = useQueryClient();
+  return createMutation<{ deletedFiles: number[] }, Error, { id: number }, {}>({
+    mutationFn: async ({ id }) => {
+      const res = await callPostApi(`/api/directory/${id}/delete`);
+      if (!res.ok) throw new Error("Failed to delete directory");
+
+      const { deletedDirectories, deletedFiles }: DirectoryDeleteResponse = await res.json();
+      await Promise.all([
+        ...deletedDirectories.map(deleteDirectoryInfo),
+        ...deletedFiles.map(deleteFileInfo),
+      ]);
+
+      return { deletedFiles };
+    },
+    onMutate: async ({ id }) => {
+      await queryClient.cancelQueries({ queryKey: ["directory", parentId] });
+      queryClient.setQueryData<DirectoryInfo>(["directory", parentId], (prevParentInfo) => {
+        if (!prevParentInfo) return undefined;
+        return {
+          ...prevParentInfo,
+          subDirectoryIds: prevParentInfo.subDirectoryIds.filter(
+            (subDirectoryId) => subDirectoryId !== id,
+          ),
+        };
+      });
+      return {};
+    },
+    onError: (_error, { id }, context) => {
+      if (context) {
+        queryClient.setQueryData<DirectoryInfo>(["directory", parentId], (prevParentInfo) => {
+          if (!prevParentInfo) return undefined;
+          return {
+            ...prevParentInfo,
+            subDirectoryIds: [...prevParentInfo.subDirectoryIds, id],
+          };
+        });
+      }
+    },
+    onSettled: () => {
+      queryClient.invalidateQueries({ queryKey: ["directory", parentId] });
+    },
+  });
+};

src/lib/modules/filesystem2/file.ts

@@ -0,0 +1,230 @@
+import { useQueryClient, createQuery, createMutation } from "@tanstack/svelte-query";
+import { callGetApi, callPostApi } from "$lib/hooks";
+import {
+  getFileInfo as getFileInfoFromIndexedDB,
+  storeFileInfo,
+  updateFileInfo,
+  deleteFileInfo,
+  type DirectoryId,
+} from "$lib/indexedDB";
+import { unwrapDataKey, encryptString, decryptString } from "$lib/modules/crypto";
+import { uploadFile } from "$lib/modules/file";
+import type { FileInfoResponse, FileRenameRequest } from "$lib/server/schemas";
+import type { MasterKey, HmacSecret } from "$lib/stores";
+import type { DirectoryInfo } from "./directory";
+
+export interface FileInfo {
+  id: number;
+  dataKey?: CryptoKey;
+  dataKeyVersion?: Date;
+  contentType: string;
+  contentIv?: string;
+  name: string;
+  createdAt?: Date;
+  lastModifiedAt: Date;
+  categoryIds: number[];
+}
+
+const decryptDate = async (ciphertext: string, iv: string, dataKey: CryptoKey) => {
+  return new Date(parseInt(await decryptString(ciphertext, iv, dataKey), 10));
+};
+
+export const getFileInfo = (id: number, masterKey: CryptoKey) => {
+  return createQuery<FileInfo>({
+    queryKey: ["file", id],
+    queryFn: async ({ client, signal }) => {
+      if (!client.getQueryData(["file", id])) {
+        const initialInfo = await getFileInfoFromIndexedDB(id);
+        if (initialInfo) {
+          setTimeout(() => client.invalidateQueries({ queryKey: ["file", id] }), 0);
+          return initialInfo;
+        }
+      }
+
+      const res = await callGetApi(`/api/file/${id}`, { signal }); // TODO: 404
+      const metadata: FileInfoResponse = await res.json();
+
+      const { dataKey } = await unwrapDataKey(metadata.dek, masterKey);
+      const name = await decryptString(metadata.name, metadata.nameIv, dataKey);
+      const createdAt =
+        metadata.createdAt && metadata.createdAtIv
+          ? await decryptDate(metadata.createdAt, metadata.createdAtIv, dataKey)
+          : undefined;
+      const lastModifiedAt = await decryptDate(
+        metadata.lastModifiedAt,
+        metadata.lastModifiedAtIv,
+        dataKey,
+      );
+
+      await storeFileInfo({
+        id,
+        parentId: metadata.parent,
+        name,
+        contentType: metadata.contentType,
+        createdAt,
+        lastModifiedAt,
+        categoryIds: metadata.categories,
+      });
+      return {
+        id,
+        dataKey,
+        dataKeyVersion: new Date(metadata.dekVersion),
+        contentType: metadata.contentType,
+        contentIv: metadata.contentIv,
+        name,
+        createdAt,
+        lastModifiedAt,
+        categoryIds: metadata.categories,
+      };
+    },
+    staleTime: Infinity,
+  });
+};
+
+export type FileInfoStore = ReturnType<typeof getFileInfo>;
+
+export const useFileUpload = (
+  parentId: DirectoryId,
+  masterKey: MasterKey,
+  hmacSecret: HmacSecret,
+) => {
+  const queryClient = useQueryClient();
+  return createMutation<
+    { fileId: number; fileBuffer: ArrayBuffer; thumbnailBuffer?: ArrayBuffer },
+    Error,
+    { file: File; onDuplicate: () => Promise<boolean> },
+    { tempId: number }
+  >({
+    mutationFn: async ({ file, onDuplicate }) => {
+      const res = await uploadFile(file, parentId, hmacSecret, masterKey, onDuplicate);
+      if (!res) throw new Error("Failed to upload file");
+
+      queryClient.setQueryData<FileInfo>(["file", res.fileId], {
+        id: res.fileId,
+        dataKey: res.fileDataKey,
+        dataKeyVersion: res.fileDataKeyVersion,
+        contentType: res.fileType,
+        contentIv: res.fileEncryptedIv,
+        name: file.name,
+        createdAt: res.fileCreatedAt,
+        lastModifiedAt: new Date(file.lastModified),
+        categoryIds: [],
+      });
+      await storeFileInfo({
+        id: res.fileId,
+        parentId,
+        name: file.name,
+        contentType: res.fileType,
+        createdAt: res.fileCreatedAt,
+        lastModifiedAt: new Date(file.lastModified),
+        categoryIds: [],
+      });
+      return {
+        fileId: res.fileId,
+        fileBuffer: res.fileBuffer,
+        thumbnailBuffer: res.thumbnailBuffer,
+      };
+    },
+    onSuccess: async ({ fileId }) => {
+      await queryClient.cancelQueries({ queryKey: ["directory", parentId] });
+      queryClient.setQueryData<DirectoryInfo>(["directory", parentId], (prevParentInfo) => {
+        if (!prevParentInfo) return undefined;
+        return {
+          ...prevParentInfo,
+          fileIds: [...prevParentInfo.fileIds, fileId],
+        };
+      });
+    },
+    onSettled: () => {
+      queryClient.invalidateQueries({ queryKey: ["directory", parentId] });
+    },
+  });
+};
+
+export const useFileRename = () => {
+  const queryClient = useQueryClient();
+  return createMutation<
+    void,
+    Error,
+    {
+      id: number;
+      dataKey: CryptoKey;
+      dataKeyVersion: Date;
+      newName: string;
+    },
+    { oldName: string | undefined }
+  >({
+    mutationFn: async ({ id, dataKey, dataKeyVersion, newName }) => {
+      const newNameEncrypted = await encryptString(newName, dataKey);
+      const res = await callPostApi<FileRenameRequest>(`/api/file/${id}/rename`, {
+        dekVersion: dataKeyVersion.toISOString(),
+        name: newNameEncrypted.ciphertext,
+        nameIv: newNameEncrypted.iv,
+      });
+      if (!res.ok) throw new Error("Failed to rename file");
+
+      await updateFileInfo(id, { name: newName });
+    },
+    onMutate: async ({ id, newName }) => {
+      await queryClient.cancelQueries({ queryKey: ["file", id] });
+
+      const prevInfo = queryClient.getQueryData<FileInfo>(["file", id]);
+      if (prevInfo) {
+        queryClient.setQueryData<FileInfo>(["file", id], {
+          ...prevInfo,
+          name: newName,
+        });
+      }
+
+      return { oldName: prevInfo?.name };
+    },
+    onError: (_error, { id }, context) => {
+      if (context?.oldName) {
+        queryClient.setQueryData<FileInfo>(["file", id], (prevInfo) => {
+          if (!prevInfo) return undefined;
+          return { ...prevInfo, name: context.oldName! };
+        });
+      }
+    },
+    onSettled: (_data, _error, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ["file", id] });
+    },
+  });
+};
+
+export const useFileDeletion = (parentId: DirectoryId) => {
+  const queryClient = useQueryClient();
+  return createMutation<void, Error, { id: number }, {}>({
+    mutationFn: async ({ id }) => {
+      const res = await callPostApi(`/api/file/${id}/delete`);
+      if (!res.ok) throw new Error("Failed to delete file");
+
+      await deleteFileInfo(id);
+    },
+    onMutate: async ({ id }) => {
+      await queryClient.cancelQueries({ queryKey: ["directory", parentId] });
+      queryClient.setQueryData<DirectoryInfo>(["directory", parentId], (prevParentInfo) => {
+        if (!prevParentInfo) return undefined;
+        return {
+          ...prevParentInfo,
+          fileIds: prevParentInfo.fileIds.filter((fileId) => fileId !== id),
+        };
+      });
+      return {};
+    },
+    onError: (_error, { id }, context) => {
+      if (context) {
+        queryClient.setQueryData<DirectoryInfo>(["directory", parentId], (prevParentInfo) => {
+          if (!prevParentInfo) return undefined;
+          return {
+            ...prevParentInfo,
+            fileIds: [...prevParentInfo.fileIds, id],
+          };
+        });
+      }
+    },
+    onSettled: () => {
+      queryClient.invalidateQueries({ queryKey: ["directory", parentId] });
+    },
+  });
+};

src/lib/modules/filesystem2/index.ts

@@ -0,0 +1,3 @@
+export * from "./category";
+export * from "./directory";
+export * from "./file";

src/lib/modules/key.ts

@@ -5,14 +5,14 @@ import type { ClientKeys } from "$lib/stores";
 const serializedClientKeysSchema = z.intersection(
   z.object({
     generator: z.literal("ArkVault"),
-    exportedAt: z.iso.datetime(),
+    exportedAt: z.string().datetime(),
   }),
   z.object({
     version: z.literal(1),
-    encryptKey: z.base64().nonempty(),
-    decryptKey: z.base64().nonempty(),
-    signKey: z.base64().nonempty(),
-    verifyKey: z.base64().nonempty(),
+    encryptKey: z.string().base64().nonempty(),
+    decryptKey: z.string().base64().nonempty(),
+    signKey: z.string().base64().nonempty(),
+    verifyKey: z.string().base64().nonempty(),
   }),
 );
 

src/lib/modules/util.ts

@@ -7,13 +7,6 @@ export const formatDate = (date: Date) => {
   return `${year}. ${month}. ${day}.`;
 };
 
-export const formatDateSortable = (date: Date) => {
-  const year = date.getFullYear();
-  const month = pad2(date.getMonth() + 1);
-  const day = pad2(date.getDate());
-  return `${year}${month}${day}`;
-};
-
 export const formatDateTime = (date: Date) => {
   const dateFormatted = formatDate(date);
   const hours = date.getHours();
@@ -39,3 +32,32 @@ export const truncateString = (str: string, maxLength = 20) => {
   if (str.length <= maxLength) return str;
   return `${str.slice(0, maxLength)}...`;
 };
+
+export enum SortBy {
+  NAME_ASC,
+  NAME_DESC,
+}
+
+type SortFunc = (a?: string, b?: string) => number;
+
+const collator = new Intl.Collator(undefined, { numeric: true, sensitivity: "base" });
+
+const sortByNameAsc: SortFunc = (a, b) => {
+  if (a && b) return collator.compare(a, b);
+  if (a) return -1;
+  if (b) return 1;
+  return 0;
+};
+
+const sortByNameDesc: SortFunc = (a, b) => -sortByNameAsc(a, b);
+
+export const sortEntries = <T extends { name?: string }>(entries: T[], sortBy: SortBy) => {
+  let sortFunc: SortFunc;
+  if (sortBy === SortBy.NAME_ASC) {
+    sortFunc = sortByNameAsc;
+  } else {
+    sortFunc = sortByNameDesc;
+  }
+
+  entries.sort((a, b) => sortFunc(a.name, b.name));
+};

src/lib/server/db/category.ts

@@ -17,7 +17,7 @@ interface Category {
 export type NewCategory = Omit<Category, "id">;
 
 export const registerCategory = async (params: NewCategory) => {
-  await db.transaction().execute(async (trx) => {
+  return await db.transaction().execute(async (trx) => {
     const mek = await trx
       .selectFrom("master_encryption_key")
       .select("version")
@@ -51,6 +51,7 @@ export const registerCategory = async (params: NewCategory) => {
         new_name: params.encName,
       })
       .execute();
+    return { id: categoryId };
   });
 };
 

src/lib/server/db/client.ts

@@ -98,6 +98,22 @@ export const createUserClient = async (userId: number, clientId: number) => {
   }
 };
 
+export const getAllUserClients = async (userId: number) => {
+  const userClients = await db
+    .selectFrom("user_client")
+    .selectAll()
+    .where("user_id", "=", userId)
+    .execute();
+  return userClients.map(
+    ({ user_id, client_id, state }) =>
+      ({
+        userId: user_id,
+        clientId: client_id,
+        state,
+      }) satisfies UserClient,
+  );
+};
+
 export const getUserClient = async (userId: number, clientId: number) => {
   const userClient = await db
     .selectFrom("user_client")

src/lib/server/db/file.ts

@@ -39,7 +39,7 @@ interface File {
 export type NewFile = Omit<File, "id">;
 
 export const registerDirectory = async (params: NewDirectory) => {
-  await db.transaction().execute(async (trx) => {
+  return await db.transaction().execute(async (trx) => {
     const mek = await trx
       .selectFrom("master_encryption_key")
       .select("version")
@@ -73,6 +73,7 @@ export const registerDirectory = async (params: NewDirectory) => {
         new_name: params.encName,
       })
       .execute();
+    return { id: directoryId };
   });
 };
 
@@ -180,7 +181,10 @@ export const unregisterDirectory = async (userId: number, directoryId: number) =
       };
       const unregisterDirectoryRecursively = async (
         directoryId: number,
-      ): Promise<{ id: number; path: string; thumbnailPath: string | null }[]> => {
+      ): Promise<{
+        subDirectories: { id: number }[];
+        files: { id: number; path: string; thumbnailPath: string | null }[];
+      }> => {
         const files = await unregisterFiles(directoryId);
         const subDirectories = await trx
           .selectFrom("directory")
@@ -188,7 +192,7 @@ export const unregisterDirectory = async (userId: number, directoryId: number) =
           .where("parent_id", "=", directoryId)
           .where("user_id", "=", userId)
           .execute();
-        const subDirectoryFilePaths = await Promise.all(
+        const subDirectoryEntries = await Promise.all(
           subDirectories.map(async ({ id }) => await unregisterDirectoryRecursively(id)),
         );
 
@@ -200,7 +204,12 @@ export const unregisterDirectory = async (userId: number, directoryId: number) =
         if (deleteRes.numDeletedRows === 0n) {
           throw new IntegrityError("Directory not found");
         }
-        return files.concat(...subDirectoryFilePaths);
+        return {
+          subDirectories: subDirectoryEntries
+            .flatMap(({ subDirectories }) => subDirectories)
+            .concat(subDirectories),
+          files: subDirectoryEntries.flatMap(({ files }) => files).concat(files),
+        };
       };
       return await unregisterDirectoryRecursively(directoryId);
     });

src/lib/server/db/index.ts

@@ -1,10 +0,0 @@
-export * as CategoryRepo from "./category";
-export * as ClientRepo from "./client";
-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 UserRepo from "./user";
-
-export * from "./error";

src/lib/server/db/mek.ts

@@ -60,6 +60,19 @@ export const registerInitialMek = async (
   });
 };
 
+export const getInitialMek = async (userId: number) => {
+  const mek = await db
+    .selectFrom("master_encryption_key")
+    .selectAll()
+    .where("user_id", "=", userId)
+    .where("version", "=", 1)
+    .limit(1)
+    .executeTakeFirst();
+  return mek
+    ? ({ userId: mek.user_id, version: mek.version, state: mek.state } satisfies Mek)
+    : null;
+};
+
 export const getAllValidClientMeks = async (userId: number, clientId: number) => {
   const clientMeks = await db
     .selectFrom("client_master_encryption_key")

src/lib/server/db/user.ts

@@ -27,6 +27,10 @@ export const getUserByEmail = async (email: string) => {
   return user ? (user satisfies User) : null;
 };
 
+export const setUserNickname = async (userId: number, nickname: string) => {
+  await db.updateTable("user").set({ nickname }).where("id", "=", userId).execute();
+};
+
 export const setUserPassword = async (userId: number, password: string) => {
   await db.updateTable("user").set({ password }).where("id", "=", userId).execute();
 };

src/lib/server/middlewares/authenticate.ts

@@ -1,7 +1,13 @@
 import { error, redirect, type Handle } from "@sveltejs/kit";
-import { cookieOptions, authenticate, AuthenticationError } from "$lib/server/modules/auth";
+import env from "$lib/server/loadenv";
+import { authenticate, AuthenticationError } from "$lib/server/modules/auth";
 
 export const authenticateMiddleware: Handle = async ({ event, resolve }) => {
+  const { pathname, search } = event.url;
+  if (pathname === "/api/auth/login") {
+    return await resolve(event);
+  }
+
   try {
     const sessionIdSigned = event.cookies.get("sessionId");
     if (!sessionIdSigned) {
@@ -10,11 +16,15 @@ export const authenticateMiddleware: Handle = async ({ event, resolve }) => {
 
     const { ip, userAgent } = event.locals;
     event.locals.session = await authenticate(sessionIdSigned, ip, userAgent);
-    event.cookies.set("sessionId", sessionIdSigned, cookieOptions);
+    event.cookies.set("sessionId", sessionIdSigned, {
+      path: "/",
+      maxAge: env.session.exp / 1000,
+      secure: true,
+      sameSite: "strict",
+    });
   } catch (e) {
     if (e instanceof AuthenticationError) {
-      const { pathname, search } = event.url;
-      if (pathname === "/auth/login" || pathname.startsWith("/api/trpc")) {
+      if (pathname === "/auth/login") {
         return await resolve(event);
       } else if (pathname.startsWith("/api")) {
         error(e.status, e.message);

src/lib/server/modules/auth.ts

@@ -1,25 +1,20 @@
 import { error } from "@sveltejs/kit";
-import { ClientRepo, SessionRepo, IntegrityError } from "$lib/server/db";
+import { getUserClient } from "$lib/server/db/client";
+import { IntegrityError } from "$lib/server/db/error";
+import { createSession, refreshSession } from "$lib/server/db/session";
 import env from "$lib/server/loadenv";
-import { verifySessionId } from "$lib/server/modules/crypto";
+import { issueSessionId, verifySessionId } from "$lib/server/modules/crypto";
 
-export interface Session {
+interface Session {
   sessionId: string;
   userId: number;
   clientId?: number;
 }
 
-export interface ClientSession extends Session {
+interface ClientSession extends Session {
   clientId: number;
 }
 
-export type SessionPermission =
-  | "any"
-  | "notClient"
-  | "anyClient"
-  | "pendingClient"
-  | "activeClient";
-
 export class AuthenticationError extends Error {
   constructor(
     public status: 400 | 401,
@@ -30,22 +25,11 @@ 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,
-  secure: true,
-  sameSite: "strict",
-} as const;
+export const startSession = async (userId: number, ip: string, userAgent: string) => {
+  const { sessionId, sessionIdSigned } = await issueSessionId(32, env.session.secret);
+  await createSession(userId, sessionId, ip, userAgent);
+  return sessionIdSigned;
+};
 
 export const authenticate = async (sessionIdSigned: string, ip: string, userAgent: string) => {
   const sessionId = verifySessionId(sessionIdSigned, env.session.secret);
@@ -54,7 +38,7 @@ export const authenticate = async (sessionIdSigned: string, ip: string, userAgen
   }
 
   try {
-    const { userId, clientId } = await SessionRepo.refreshSession(sessionId, ip, userAgent);
+    const { userId, clientId } = await refreshSession(sessionId, ip, userAgent);
     return {
       id: sessionId,
       userId,
@@ -68,12 +52,34 @@ export const authenticate = async (sessionIdSigned: string, ip: string, userAgen
   }
 };
 
-export const authorizeInternal = async (
+export async function authorize(locals: App.Locals, requiredPermission: "any"): Promise<Session>;
+
+export async function authorize(
   locals: App.Locals,
-  requiredPermission: SessionPermission,
-): Promise<Session> => {
+  requiredPermission: "notClient",
+): Promise<Session>;
+
+export async function authorize(
+  locals: App.Locals,
+  requiredPermission: "anyClient",
+): Promise<ClientSession>;
+
+export async function authorize(
+  locals: App.Locals,
+  requiredPermission: "pendingClient",
+): Promise<ClientSession>;
+
+export async function authorize(
+  locals: App.Locals,
+  requiredPermission: "activeClient",
+): Promise<ClientSession>;
+
+export async function authorize(
+  locals: App.Locals,
+  requiredPermission: "any" | "notClient" | "anyClient" | "pendingClient" | "activeClient",
+): Promise<Session> {
   if (!locals.session) {
-    throw new AuthorizationError(500, "Unauthenticated");
+    error(500, "Unauthenticated");
   }
 
   const { id: sessionId, userId, clientId } = locals.session;
@@ -83,63 +89,39 @@ export const authorizeInternal = async (
       break;
     case "notClient":
       if (clientId) {
-        throw new AuthorizationError(403, "Forbidden");
+        error(403, "Forbidden");
       }
       break;
     case "anyClient":
       if (!clientId) {
-        throw new AuthorizationError(403, "Forbidden");
+        error(403, "Forbidden");
       }
       break;
     case "pendingClient": {
       if (!clientId) {
-        throw new AuthorizationError(403, "Forbidden");
+        error(403, "Forbidden");
       }
-      const userClient = await ClientRepo.getUserClient(userId, clientId);
+      const userClient = await getUserClient(userId, clientId);
       if (!userClient) {
-        throw new AuthorizationError(500, "Invalid session id");
+        error(500, "Invalid session id");
       } else if (userClient.state !== "pending") {
-        throw new AuthorizationError(403, "Forbidden");
+        error(403, "Forbidden");
       }
       break;
     }
     case "activeClient": {
       if (!clientId) {
-        throw new AuthorizationError(403, "Forbidden");
+        error(403, "Forbidden");
       }
-      const userClient = await ClientRepo.getUserClient(userId, clientId);
+      const userClient = await getUserClient(userId, clientId);
       if (!userClient) {
-        throw new AuthorizationError(500, "Invalid session id");
+        error(500, "Invalid session id");
       } else if (userClient.state !== "active") {
-        throw new AuthorizationError(403, "Forbidden");
+        error(403, "Forbidden");
       }
       break;
     }
   }
 
   return { sessionId, userId, clientId };
-};
-
-export async function authorize(
-  locals: App.Locals,
-  requiredPermission: "any" | "notClient",
-): Promise<Session>;
-
-export async function authorize(
-  locals: App.Locals,
-  requiredPermission: "anyClient" | "pendingClient" | "activeClient",
-): Promise<ClientSession>;
-
-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;
-  }
 }

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/modules/mek.ts

@@ -0,0 +1,25 @@
+import { error } from "@sveltejs/kit";
+import { getUserClientWithDetails } from "$lib/server/db/client";
+import { getInitialMek } from "$lib/server/db/mek";
+import { verifySignature } from "$lib/server/modules/crypto";
+
+export const isInitialMekNeeded = async (userId: number) => {
+  const initialMek = await getInitialMek(userId);
+  return !initialMek;
+};
+
+export const verifyClientEncMekSig = async (
+  userId: number,
+  clientId: number,
+  version: number,
+  encMek: string,
+  encMekSig: string,
+) => {
+  const userClient = await getUserClientWithDetails(userId, clientId);
+  if (!userClient) {
+    error(500, "Invalid session id");
+  }
+
+  const data = JSON.stringify({ version, key: encMek });
+  return verifySignature(Buffer.from(data), encMekSig, userClient.sigPubKey);
+};

src/lib/server/schemas/auth.ts

@@ -0,0 +1,32 @@
+import { z } from "zod";
+
+export const passwordChangeRequest = z.object({
+  oldPassword: z.string().trim().nonempty(),
+  newPassword: z.string().trim().nonempty(),
+});
+export type PasswordChangeRequest = z.input<typeof passwordChangeRequest>;
+
+export const loginRequest = z.object({
+  email: z.string().email(),
+  password: z.string().trim().nonempty(),
+});
+export type LoginRequest = z.input<typeof loginRequest>;
+
+export const sessionUpgradeRequest = z.object({
+  encPubKey: z.string().base64().nonempty(),
+  sigPubKey: z.string().base64().nonempty(),
+});
+export type SessionUpgradeRequest = z.input<typeof sessionUpgradeRequest>;
+
+export const sessionUpgradeResponse = z.object({
+  id: z.number().int().positive(),
+  challenge: z.string().base64().nonempty(),
+});
+export type SessionUpgradeResponse = z.output<typeof sessionUpgradeResponse>;
+
+export const sessionUpgradeVerifyRequest = z.object({
+  id: z.number().int().positive(),
+  answerSig: z.string().base64().nonempty(),
+  force: z.boolean().default(false),
+});
+export type SessionUpgradeVerifyRequest = z.input<typeof sessionUpgradeVerifyRequest>;

src/lib/server/schemas/category.ts

@@ -1,3 +1,60 @@
 import { z } from "zod";
 
-export const categoryIdSchema = z.union([z.literal("root"), z.int().positive()]);
+export const categoryIdSchema = z.union([z.literal("root"), z.number().int().positive()]);
+
+export const categoryInfoResponse = z.object({
+  metadata: z
+    .object({
+      parent: categoryIdSchema,
+      mekVersion: z.number().int().positive(),
+      dek: z.string().base64().nonempty(),
+      dekVersion: z.string().datetime(),
+      name: z.string().base64().nonempty(),
+      nameIv: z.string().base64().nonempty(),
+    })
+    .optional(),
+  subCategories: z.number().int().positive().array(),
+});
+export type CategoryInfoResponse = z.output<typeof categoryInfoResponse>;
+
+export const categoryFileAddRequest = z.object({
+  file: z.number().int().positive(),
+});
+export type CategoryFileAddRequest = z.input<typeof categoryFileAddRequest>;
+
+export const categoryFileListResponse = z.object({
+  files: z.array(
+    z.object({
+      file: z.number().int().positive(),
+      isRecursive: z.boolean(),
+    }),
+  ),
+});
+export type CategoryFileListResponse = z.output<typeof categoryFileListResponse>;
+
+export const categoryFileRemoveRequest = z.object({
+  file: z.number().int().positive(),
+});
+export type CategoryFileRemoveRequest = z.input<typeof categoryFileRemoveRequest>;
+
+export const categoryRenameRequest = z.object({
+  dekVersion: z.string().datetime(),
+  name: z.string().base64().nonempty(),
+  nameIv: z.string().base64().nonempty(),
+});
+export type CategoryRenameRequest = z.input<typeof categoryRenameRequest>;
+
+export const categoryCreateRequest = z.object({
+  parent: categoryIdSchema,
+  mekVersion: z.number().int().positive(),
+  dek: z.string().base64().nonempty(),
+  dekVersion: z.string().datetime(),
+  name: z.string().base64().nonempty(),
+  nameIv: z.string().base64().nonempty(),
+});
+export type CategoryCreateRequest = z.input<typeof categoryCreateRequest>;
+
+export const categoryCreateResponse = z.object({
+  category: z.number().int().positive(),
+});
+export type CategoryCreateResponse = z.output<typeof categoryCreateResponse>;

src/lib/server/schemas/client.ts

@@ -0,0 +1,36 @@
+import { z } from "zod";
+
+export const clientListResponse = z.object({
+  clients: z.array(
+    z.object({
+      id: z.number().int().positive(),
+      state: z.enum(["pending", "active"]),
+    }),
+  ),
+});
+export type ClientListResponse = z.output<typeof clientListResponse>;
+
+export const clientRegisterRequest = z.object({
+  encPubKey: z.string().base64().nonempty(),
+  sigPubKey: z.string().base64().nonempty(),
+});
+export type ClientRegisterRequest = z.input<typeof clientRegisterRequest>;
+
+export const clientRegisterResponse = z.object({
+  id: z.number().int().positive(),
+  challenge: z.string().base64().nonempty(),
+});
+export type ClientRegisterResponse = z.output<typeof clientRegisterResponse>;
+
+export const clientRegisterVerifyRequest = z.object({
+  id: z.number().int().positive(),
+  answerSig: z.string().base64().nonempty(),
+});
+export type ClientRegisterVerifyRequest = z.input<typeof clientRegisterVerifyRequest>;
+
+export const clientStatusResponse = z.object({
+  id: z.number().int().positive(),
+  state: z.enum(["pending", "active"]),
+  isInitialMekNeeded: z.boolean(),
+});
+export type ClientStatusResponse = z.output<typeof clientStatusResponse>;

src/lib/server/schemas/directory.ts

@@ -1,3 +1,47 @@
 import { z } from "zod";
 
-export const directoryIdSchema = z.union([z.literal("root"), z.int().positive()]);
+export const directoryIdSchema = z.union([z.literal("root"), z.number().int().positive()]);
+
+export const directoryInfoResponse = z.object({
+  metadata: z
+    .object({
+      parent: directoryIdSchema,
+      mekVersion: z.number().int().positive(),
+      dek: z.string().base64().nonempty(),
+      dekVersion: z.string().datetime(),
+      name: z.string().base64().nonempty(),
+      nameIv: z.string().base64().nonempty(),
+    })
+    .optional(),
+  subDirectories: z.number().int().positive().array(),
+  files: z.number().int().positive().array(),
+});
+export type DirectoryInfoResponse = z.output<typeof directoryInfoResponse>;
+
+export const directoryDeleteResponse = z.object({
+  deletedDirectories: z.number().int().positive().array(),
+  deletedFiles: z.number().int().positive().array(),
+});
+export type DirectoryDeleteResponse = z.output<typeof directoryDeleteResponse>;
+
+export const directoryRenameRequest = z.object({
+  dekVersion: z.string().datetime(),
+  name: z.string().base64().nonempty(),
+  nameIv: z.string().base64().nonempty(),
+});
+export type DirectoryRenameRequest = z.input<typeof directoryRenameRequest>;
+
+export const directoryCreateRequest = z.object({
+  parent: directoryIdSchema,
+  mekVersion: z.number().int().positive(),
+  dek: z.string().base64().nonempty(),
+  dekVersion: z.string().datetime(),
+  name: z.string().base64().nonempty(),
+  nameIv: z.string().base64().nonempty(),
+});
+export type DirectoryCreateRequest = z.input<typeof directoryCreateRequest>;
+
+export const directoryCreateResponse = z.object({
+  directory: z.number().int().positive(),
+});
+export type DirectoryCreateResponse = z.output<typeof directoryCreateResponse>;

src/lib/server/schemas/file.ts

@@ -2,35 +2,90 @@ import mime from "mime";
 import { z } from "zod";
 import { directoryIdSchema } from "./directory";
 
-export const fileThumbnailUploadRequest = z.object({
-  dekVersion: z.iso.datetime(),
-  contentIv: z.base64().nonempty(),
-});
-export type FileThumbnailUploadRequest = z.input<typeof fileThumbnailUploadRequest>;
-
-export const fileUploadRequest = z.object({
+export const fileInfoResponse = z.object({
   parent: directoryIdSchema,
-  mekVersion: z.int().positive(),
-  dek: z.base64().nonempty(),
-  dekVersion: z.iso.datetime(),
-  hskVersion: z.int().positive(),
-  contentHmac: z.base64().nonempty(),
+  mekVersion: z.number().int().positive(),
+  dek: z.string().base64().nonempty(),
+  dekVersion: z.string().datetime(),
   contentType: z
     .string()
     .trim()
     .nonempty()
     .refine((value) => mime.getExtension(value) !== null), // MIME type
-  contentIv: z.base64().nonempty(),
-  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(),
+  contentIv: z.string().base64().nonempty(),
+  name: z.string().base64().nonempty(),
+  nameIv: z.string().base64().nonempty(),
+  createdAt: z.string().base64().nonempty().optional(),
+  createdAtIv: z.string().base64().nonempty().optional(),
+  lastModifiedAt: z.string().base64().nonempty(),
+  lastModifiedAtIv: z.string().base64().nonempty(),
+  categories: z.number().int().positive().array(),
+});
+export type FileInfoResponse = z.output<typeof fileInfoResponse>;
+
+export const fileRenameRequest = z.object({
+  dekVersion: z.string().datetime(),
+  name: z.string().base64().nonempty(),
+  nameIv: z.string().base64().nonempty(),
+});
+export type FileRenameRequest = z.input<typeof fileRenameRequest>;
+
+export const fileThumbnailInfoResponse = z.object({
+  updatedAt: z.string().datetime(),
+  contentIv: z.string().base64().nonempty(),
+});
+export type FileThumbnailInfoResponse = z.output<typeof fileThumbnailInfoResponse>;
+
+export const fileThumbnailUploadRequest = z.object({
+  dekVersion: z.string().datetime(),
+  contentIv: z.string().base64().nonempty(),
+});
+export type FileThumbnailUploadRequest = z.input<typeof fileThumbnailUploadRequest>;
+
+export const fileListResponse = z.object({
+  files: z.number().int().positive().array(),
+});
+export type FileListResponse = z.output<typeof fileListResponse>;
+
+export const duplicateFileScanRequest = z.object({
+  hskVersion: z.number().int().positive(),
+  contentHmac: z.string().base64().nonempty(),
+});
+export type DuplicateFileScanRequest = z.input<typeof duplicateFileScanRequest>;
+
+export const duplicateFileScanResponse = z.object({
+  files: z.number().int().positive().array(),
+});
+export type DuplicateFileScanResponse = z.output<typeof duplicateFileScanResponse>;
+
+export const missingThumbnailFileScanResponse = z.object({
+  files: z.number().int().positive().array(),
+});
+export type MissingThumbnailFileScanResponse = z.output<typeof missingThumbnailFileScanResponse>;
+
+export const fileUploadRequest = z.object({
+  parent: directoryIdSchema,
+  mekVersion: z.number().int().positive(),
+  dek: z.string().base64().nonempty(),
+  dekVersion: z.string().datetime(),
+  hskVersion: z.number().int().positive(),
+  contentHmac: z.string().base64().nonempty(),
+  contentType: z
+    .string()
+    .trim()
+    .nonempty()
+    .refine((value) => mime.getExtension(value) !== null), // MIME type
+  contentIv: z.string().base64().nonempty(),
+  name: z.string().base64().nonempty(),
+  nameIv: z.string().base64().nonempty(),
+  createdAt: z.string().base64().nonempty().optional(),
+  createdAtIv: z.string().base64().nonempty().optional(),
+  lastModifiedAt: z.string().base64().nonempty(),
+  lastModifiedAtIv: z.string().base64().nonempty(),
 });
 export type FileUploadRequest = z.input<typeof fileUploadRequest>;
 
 export const fileUploadResponse = z.object({
-  file: z.int().positive(),
+  file: z.number().int().positive(),
 });
 export type FileUploadResponse = z.output<typeof fileUploadResponse>;

src/lib/server/schemas/hsk.ts

@@ -0,0 +1,19 @@
+import { z } from "zod";
+
+export const hmacSecretListResponse = z.object({
+  hsks: z.array(
+    z.object({
+      version: z.number().int().positive(),
+      state: z.enum(["active"]),
+      mekVersion: z.number().int().positive(),
+      hsk: z.string().base64().nonempty(),
+    }),
+  ),
+});
+export type HmacSecretListResponse = z.output<typeof hmacSecretListResponse>;
+
+export const initialHmacSecretRegisterRequest = z.object({
+  mekVersion: z.number().int().positive(),
+  hsk: z.string().base64().nonempty(),
+});
+export type InitialHmacSecretRegisterRequest = z.input<typeof initialHmacSecretRegisterRequest>;

src/lib/server/schemas/index.ts

@@ -1,3 +1,8 @@
+export * from "./auth";
 export * from "./category";
+export * from "./client";
 export * from "./directory";
 export * from "./file";
+export * from "./hsk";
+export * from "./mek";
+export * from "./user";

src/lib/server/schemas/mek.ts

@@ -0,0 +1,19 @@
+import { z } from "zod";
+
+export const masterKeyListResponse = z.object({
+  meks: z.array(
+    z.object({
+      version: z.number().int().positive(),
+      state: z.enum(["active", "retired"]),
+      mek: z.string().base64().nonempty(),
+      mekSig: z.string().base64().nonempty(),
+    }),
+  ),
+});
+export type MasterKeyListResponse = z.output<typeof masterKeyListResponse>;
+
+export const initialMasterKeyRegisterRequest = z.object({
+  mek: z.string().base64().nonempty(),
+  mekSig: z.string().base64().nonempty(),
+});
+export type InitialMasterKeyRegisterRequest = z.input<typeof initialMasterKeyRegisterRequest>;

src/lib/server/schemas/user.ts

@@ -0,0 +1,12 @@
+import { z } from "zod";
+
+export const userInfoResponse = z.object({
+  email: z.string().email(),
+  nickname: z.string().nonempty(),
+});
+export type UserInfoResponse = z.output<typeof userInfoResponse>;
+
+export const nicknameChangeRequest = z.object({
+  newNickname: z.string().trim().min(2).max(8),
+});
+export type NicknameChangeRequest = z.input<typeof nicknameChangeRequest>;

src/lib/server/services/auth.ts

@@ -0,0 +1,122 @@
+import { error } from "@sveltejs/kit";
+import argon2 from "argon2";
+import { getClient, getClientByPubKeys, getUserClient } from "$lib/server/db/client";
+import { IntegrityError } from "$lib/server/db/error";
+import {
+  upgradeSession,
+  deleteSession,
+  deleteAllOtherSessions,
+  registerSessionUpgradeChallenge,
+  consumeSessionUpgradeChallenge,
+} from "$lib/server/db/session";
+import { getUser, getUserByEmail, setUserPassword } from "$lib/server/db/user";
+import env from "$lib/server/loadenv";
+import { startSession } from "$lib/server/modules/auth";
+import { verifySignature, generateChallenge } from "$lib/server/modules/crypto";
+
+const hashPassword = async (password: string) => {
+  return await argon2.hash(password);
+};
+
+const verifyPassword = async (hash: string, password: string) => {
+  return await argon2.verify(hash, password);
+};
+
+export const changePassword = async (
+  userId: number,
+  sessionId: string,
+  oldPassword: string,
+  newPassword: string,
+) => {
+  if (oldPassword === newPassword) {
+    error(400, "Same passwords");
+  } else if (newPassword.length < 8) {
+    error(400, "Too short password");
+  }
+
+  const user = await getUser(userId);
+  if (!user) {
+    error(500, "Invalid session id");
+  } else if (!(await verifyPassword(user.password, oldPassword))) {
+    error(403, "Invalid password");
+  }
+
+  await setUserPassword(userId, await hashPassword(newPassword));
+  await deleteAllOtherSessions(userId, sessionId);
+};
+
+export const login = async (email: string, password: string, ip: string, userAgent: string) => {
+  const user = await getUserByEmail(email);
+  if (!user || !(await verifyPassword(user.password, password))) {
+    error(401, "Invalid email or password");
+  }
+
+  return { sessionIdSigned: await startSession(user.id, ip, userAgent) };
+};
+
+export const logout = async (sessionId: string) => {
+  await deleteSession(sessionId);
+};
+
+export const createSessionUpgradeChallenge = async (
+  sessionId: string,
+  userId: number,
+  ip: string,
+  encPubKey: string,
+  sigPubKey: string,
+) => {
+  const client = await getClientByPubKeys(encPubKey, sigPubKey);
+  const userClient = client ? await getUserClient(userId, client.id) : undefined;
+  if (!client) {
+    error(401, "Invalid public key(s)");
+  } else if (!userClient || userClient.state === "challenging") {
+    error(403, "Unregistered client");
+  }
+
+  const { answer, challenge } = await generateChallenge(32, encPubKey);
+  const { id } = await registerSessionUpgradeChallenge(
+    sessionId,
+    client.id,
+    answer.toString("base64"),
+    ip,
+    new Date(Date.now() + env.challenge.sessionUpgradeExp),
+  );
+
+  return { id, challenge: challenge.toString("base64") };
+};
+
+export const verifySessionUpgradeChallenge = async (
+  sessionId: string,
+  userId: number,
+  ip: string,
+  challengeId: number,
+  answerSig: string,
+  force: boolean,
+) => {
+  const challenge = await consumeSessionUpgradeChallenge(challengeId, sessionId, ip);
+  if (!challenge) {
+    error(403, "Invalid challenge answer");
+  }
+
+  const client = await getClient(challenge.clientId);
+  if (!client) {
+    error(500, "Invalid challenge answer");
+  } else if (
+    !verifySignature(Buffer.from(challenge.answer, "base64"), answerSig, client.sigPubKey)
+  ) {
+    error(403, "Invalid challenge answer signature");
+  }
+
+  try {
+    await upgradeSession(userId, sessionId, client.id, force);
+  } catch (e) {
+    if (e instanceof IntegrityError) {
+      if (e.message === "Session not found") {
+        error(500, "Invalid challenge answer");
+      } else if (!force && e.message === "Session already exists") {
+        error(409, "Already logged in");
+      }
+    }
+    throw e;
+  }
+};

src/lib/server/services/category.ts

@@ -0,0 +1,134 @@
+import { error } from "@sveltejs/kit";
+import {
+  registerCategory,
+  getAllCategoriesByParent,
+  getCategory,
+  setCategoryEncName,
+  unregisterCategory,
+  type CategoryId,
+  type NewCategory,
+} from "$lib/server/db/category";
+import { IntegrityError } from "$lib/server/db/error";
+import {
+  getAllFilesByCategory,
+  getFile,
+  addFileToCategory,
+  removeFileFromCategory,
+} from "$lib/server/db/file";
+import type { Ciphertext } from "$lib/server/db/schema";
+
+export const getCategoryInformation = async (userId: number, categoryId: CategoryId) => {
+  const category = categoryId !== "root" ? await getCategory(userId, categoryId) : undefined;
+  if (category === null) {
+    error(404, "Invalid category id");
+  }
+
+  const categories = await getAllCategoriesByParent(userId, categoryId);
+  return {
+    metadata: category && {
+      parentId: category.parentId ?? ("root" as const),
+      mekVersion: category.mekVersion,
+      encDek: category.encDek,
+      dekVersion: category.dekVersion,
+      encName: category.encName,
+    },
+    categories: categories.map(({ id }) => id),
+  };
+};
+
+export const deleteCategory = async (userId: number, categoryId: number) => {
+  try {
+    await unregisterCategory(userId, categoryId);
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "Category not found") {
+      error(404, "Invalid category id");
+    }
+    throw e;
+  }
+};
+
+export const addCategoryFile = async (userId: number, categoryId: number, fileId: number) => {
+  const category = await getCategory(userId, categoryId);
+  const file = await getFile(userId, fileId);
+  if (!category) {
+    error(404, "Invalid category id");
+  } else if (!file) {
+    error(404, "Invalid file id");
+  }
+
+  try {
+    await addFileToCategory(fileId, categoryId);
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "File already added to category") {
+      error(400, "File already added");
+    }
+    throw e;
+  }
+};
+
+export const getCategoryFiles = async (userId: number, categoryId: number, recurse: boolean) => {
+  const category = await getCategory(userId, categoryId);
+  if (!category) {
+    error(404, "Invalid category id");
+  }
+
+  const files = await getAllFilesByCategory(userId, categoryId, recurse);
+  return { files };
+};
+
+export const removeCategoryFile = async (userId: number, categoryId: number, fileId: number) => {
+  const category = await getCategory(userId, categoryId);
+  const file = await getFile(userId, fileId);
+  if (!category) {
+    error(404, "Invalid category id");
+  } else if (!file) {
+    error(404, "Invalid file id");
+  }
+
+  try {
+    await removeFileFromCategory(fileId, categoryId);
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "File not found in category") {
+      error(400, "File not added");
+    }
+    throw e;
+  }
+};
+
+export const renameCategory = async (
+  userId: number,
+  categoryId: number,
+  dekVersion: Date,
+  newEncName: Ciphertext,
+) => {
+  try {
+    await setCategoryEncName(userId, categoryId, dekVersion, newEncName);
+  } catch (e) {
+    if (e instanceof IntegrityError) {
+      if (e.message === "Category not found") {
+        error(404, "Invalid category id");
+      } else if (e.message === "Invalid DEK version") {
+        error(400, "Invalid DEK version");
+      }
+    }
+    throw e;
+  }
+};
+
+export const createCategory = async (params: NewCategory) => {
+  const oneMinuteAgo = new Date(Date.now() - 60 * 1000);
+  const oneMinuteLater = new Date(Date.now() + 60 * 1000);
+  if (params.dekVersion <= oneMinuteAgo || params.dekVersion >= oneMinuteLater) {
+    error(400, "Invalid DEK version");
+  }
+
+  try {
+    const { id } = await registerCategory(params);
+    return { id };
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "Inactive MEK version") {
+      error(400, "Inactive MEK version");
+    }
+    throw e;
+  }
+};

src/lib/server/services/client.ts

@@ -0,0 +1,116 @@
+import { error } from "@sveltejs/kit";
+import {
+  createClient,
+  getClient,
+  getClientByPubKeys,
+  createUserClient,
+  getAllUserClients,
+  getUserClient,
+  setUserClientStateToPending,
+  registerUserClientChallenge,
+  consumeUserClientChallenge,
+} from "$lib/server/db/client";
+import { IntegrityError } from "$lib/server/db/error";
+import { verifyPubKey, verifySignature, generateChallenge } from "$lib/server/modules/crypto";
+import { isInitialMekNeeded } from "$lib/server/modules/mek";
+import env from "$lib/server/loadenv";
+
+export const getUserClientList = async (userId: number) => {
+  const userClients = await getAllUserClients(userId);
+  return {
+    userClients: userClients.map(({ clientId, state }) => ({
+      id: clientId,
+      state: state as "pending" | "active",
+    })),
+  };
+};
+
+const expiresAt = () => new Date(Date.now() + env.challenge.userClientExp);
+
+const createUserClientChallenge = async (
+  ip: string,
+  userId: number,
+  clientId: number,
+  encPubKey: string,
+) => {
+  const { answer, challenge } = await generateChallenge(32, encPubKey);
+  const { id } = await registerUserClientChallenge(
+    userId,
+    clientId,
+    answer.toString("base64"),
+    ip,
+    expiresAt(),
+  );
+  return { id, challenge: challenge.toString("base64") };
+};
+
+export const registerUserClient = async (
+  userId: number,
+  ip: string,
+  encPubKey: string,
+  sigPubKey: string,
+) => {
+  const client = await getClientByPubKeys(encPubKey, sigPubKey);
+  if (client) {
+    try {
+      await createUserClient(userId, client.id);
+      return await createUserClientChallenge(ip, userId, client.id, encPubKey);
+    } catch (e) {
+      if (e instanceof IntegrityError && e.message === "User client already exists") {
+        error(409, "Client already registered");
+      }
+      throw e;
+    }
+  } else {
+    if (encPubKey === sigPubKey) {
+      error(400, "Same public keys");
+    } else if (!verifyPubKey(encPubKey) || !verifyPubKey(sigPubKey)) {
+      error(400, "Invalid public key(s)");
+    }
+
+    try {
+      const { id: clientId } = await createClient(encPubKey, sigPubKey, userId);
+      return await createUserClientChallenge(ip, userId, clientId, encPubKey);
+    } catch (e) {
+      if (e instanceof IntegrityError && e.message === "Public key(s) already registered") {
+        error(409, "Public key(s) already used");
+      }
+      throw e;
+    }
+  }
+};
+
+export const verifyUserClient = async (
+  userId: number,
+  ip: string,
+  challengeId: number,
+  answerSig: string,
+) => {
+  const challenge = await consumeUserClientChallenge(challengeId, userId, ip);
+  if (!challenge) {
+    error(403, "Invalid challenge answer");
+  }
+
+  const client = await getClient(challenge.clientId);
+  if (!client) {
+    error(500, "Invalid challenge answer");
+  } else if (
+    !verifySignature(Buffer.from(challenge.answer, "base64"), answerSig, client.sigPubKey)
+  ) {
+    error(403, "Invalid challenge answer signature");
+  }
+
+  await setUserClientStateToPending(userId, client.id);
+};
+
+export const getUserClientStatus = async (userId: number, clientId: number) => {
+  const userClient = await getUserClient(userId, clientId);
+  if (!userClient) {
+    error(500, "Invalid session id");
+  }
+
+  return {
+    state: userClient.state as "pending" | "active",
+    isInitialMekNeeded: await isInitialMekNeeded(userId),
+  };
+};

src/lib/server/services/directory.ts

@@ -0,0 +1,98 @@
+import { error } from "@sveltejs/kit";
+import { unlink } from "fs/promises";
+import { IntegrityError } from "$lib/server/db/error";
+import {
+  registerDirectory,
+  getAllDirectoriesByParent,
+  getDirectory,
+  setDirectoryEncName,
+  unregisterDirectory,
+  getAllFilesByParent,
+  type DirectoryId,
+  type NewDirectory,
+} from "$lib/server/db/file";
+import type { Ciphertext } from "$lib/server/db/schema";
+
+export const getDirectoryInformation = async (userId: number, directoryId: DirectoryId) => {
+  const directory = directoryId !== "root" ? await getDirectory(userId, directoryId) : undefined;
+  if (directory === null) {
+    error(404, "Invalid directory id");
+  }
+
+  const directories = await getAllDirectoriesByParent(userId, directoryId);
+  const files = await getAllFilesByParent(userId, directoryId);
+  return {
+    metadata: directory && {
+      parentId: directory.parentId ?? ("root" as const),
+      mekVersion: directory.mekVersion,
+      encDek: directory.encDek,
+      dekVersion: directory.dekVersion,
+      encName: directory.encName,
+    },
+    directories: directories.map(({ id }) => id),
+    files: files.map(({ id }) => id),
+  };
+};
+
+const safeUnlink = async (path: string | null) => {
+  if (path) {
+    await unlink(path).catch(console.error);
+  }
+};
+
+export const deleteDirectory = async (userId: number, directoryId: number) => {
+  try {
+    const { subDirectories, files } = await unregisterDirectory(userId, directoryId);
+    return {
+      directories: [...subDirectories.map(({ id }) => id), directoryId],
+      files: files.map(({ id, path, thumbnailPath }) => {
+        safeUnlink(path); // Intended
+        safeUnlink(thumbnailPath); // Intended
+        return id;
+      }),
+    };
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "Directory not found") {
+      error(404, "Invalid directory id");
+    }
+    throw e;
+  }
+};
+
+export const renameDirectory = async (
+  userId: number,
+  directoryId: number,
+  dekVersion: Date,
+  newEncName: Ciphertext,
+) => {
+  try {
+    await setDirectoryEncName(userId, directoryId, dekVersion, newEncName);
+  } catch (e) {
+    if (e instanceof IntegrityError) {
+      if (e.message === "Directory not found") {
+        error(404, "Invalid directory id");
+      } else if (e.message === "Invalid DEK version") {
+        error(400, "Invalid DEK version");
+      }
+    }
+    throw e;
+  }
+};
+
+export const createDirectory = async (params: NewDirectory) => {
+  const oneMinuteAgo = new Date(Date.now() - 60 * 1000);
+  const oneMinuteLater = new Date(Date.now() + 60 * 1000);
+  if (params.dekVersion <= oneMinuteAgo || params.dekVersion >= oneMinuteLater) {
+    error(400, "Invalid DEK version");
+  }
+
+  try {
+    const { id } = await registerDirectory(params);
+    return { id };
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "Inactive MEK version") {
+      error(400, "Invalid MEK version");
+    }
+    throw e;
+  }
+};

src/lib/server/services/file.ts

@@ -1,17 +1,72 @@
 import { error } from "@sveltejs/kit";
 import { createHash } from "crypto";
 import { createReadStream, createWriteStream } from "fs";
-import { mkdir, stat } from "fs/promises";
+import { mkdir, stat, unlink } from "fs/promises";
 import { dirname } from "path";
 import { Readable } from "stream";
 import { pipeline } from "stream/promises";
 import { v4 as uuidv4 } from "uuid";
-import { FileRepo, MediaRepo, IntegrityError } from "$lib/server/db";
+import { IntegrityError } from "$lib/server/db/error";
+import {
+  registerFile,
+  getAllFileIds,
+  getAllFileIdsByContentHmac,
+  getFile,
+  setFileEncName,
+  unregisterFile,
+  getAllFileCategories,
+  type NewFile,
+} from "$lib/server/db/file";
+import {
+  updateFileThumbnail,
+  getFileThumbnail,
+  getMissingFileThumbnails,
+} from "$lib/server/db/media";
+import type { Ciphertext } from "$lib/server/db/schema";
 import env from "$lib/server/loadenv";
-import { safeUnlink } from "$lib/server/modules/filesystem";
+
+export const getFileInformation = async (userId: number, fileId: number) => {
+  const file = await getFile(userId, fileId);
+  if (!file) {
+    error(404, "Invalid file id");
+  }
+
+  const categories = await getAllFileCategories(fileId);
+  return {
+    parentId: file.parentId ?? ("root" as const),
+    mekVersion: file.mekVersion,
+    encDek: file.encDek,
+    dekVersion: file.dekVersion,
+    contentType: file.contentType,
+    encContentIv: file.encContentIv,
+    encName: file.encName,
+    encCreatedAt: file.encCreatedAt,
+    encLastModifiedAt: file.encLastModifiedAt,
+    categories: categories.map(({ id }) => id),
+  };
+};
+
+const safeUnlink = async (path: string | null) => {
+  if (path) {
+    await unlink(path).catch(console.error);
+  }
+};
+
+export const deleteFile = async (userId: number, fileId: number) => {
+  try {
+    const { path, thumbnailPath } = await unregisterFile(userId, fileId);
+    safeUnlink(path); // Intended
+    safeUnlink(thumbnailPath); // Intended
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "File not found") {
+      error(404, "Invalid file id");
+    }
+    throw e;
+  }
+};
 
 export const getFileStream = async (userId: number, fileId: number) => {
-  const file = await FileRepo.getFile(userId, fileId);
+  const file = await getFile(userId, fileId);
   if (!file) {
     error(404, "Invalid file id");
   }
@@ -23,8 +78,37 @@ export const getFileStream = async (userId: number, fileId: number) => {
   };
 };
 
+export const renameFile = async (
+  userId: number,
+  fileId: number,
+  dekVersion: Date,
+  newEncName: Ciphertext,
+) => {
+  try {
+    await setFileEncName(userId, fileId, dekVersion, newEncName);
+  } catch (e) {
+    if (e instanceof IntegrityError) {
+      if (e.message === "File not found") {
+        error(404, "Invalid file id");
+      } else if (e.message === "Invalid DEK version") {
+        error(400, "Invalid DEK version");
+      }
+    }
+    throw e;
+  }
+};
+
+export const getFileThumbnailInformation = async (userId: number, fileId: number) => {
+  const thumbnail = await getFileThumbnail(userId, fileId);
+  if (!thumbnail) {
+    error(404, "File or its thumbnail not found");
+  }
+
+  return { updatedAt: thumbnail.updatedAt, encContentIv: thumbnail.encContentIv };
+};
+
 export const getFileThumbnailStream = async (userId: number, fileId: number) => {
-  const thumbnail = await MediaRepo.getFileThumbnail(userId, fileId);
+  const thumbnail = await getFileThumbnail(userId, fileId);
   if (!thumbnail) {
     error(404, "File or its thumbnail not found");
   }
@@ -49,13 +133,7 @@ export const uploadFileThumbnail = async (
   try {
     await pipeline(encContentStream, createWriteStream(path, { flags: "wx", mode: 0o600 }));
 
-    const oldPath = await MediaRepo.updateFileThumbnail(
-      userId,
-      fileId,
-      dekVersion,
-      path,
-      encContentIv,
-    );
+    const oldPath = await updateFileThumbnail(userId, fileId, dekVersion, path, encContentIv);
     safeUnlink(oldPath); // Intended
   } catch (e) {
     await safeUnlink(path);
@@ -71,8 +149,27 @@ export const uploadFileThumbnail = async (
   }
 };
 
+export const getFileList = async (userId: number) => {
+  const fileIds = await getAllFileIds(userId);
+  return { files: fileIds };
+};
+
+export const scanDuplicateFiles = async (
+  userId: number,
+  hskVersion: number,
+  contentHmac: string,
+) => {
+  const fileIds = await getAllFileIdsByContentHmac(userId, hskVersion, contentHmac);
+  return { files: fileIds };
+};
+
+export const scanMissingFileThumbnails = async (userId: number) => {
+  const fileIds = await getMissingFileThumbnails(userId);
+  return { files: fileIds };
+};
+
 export const uploadFile = async (
-  params: Omit<FileRepo.NewFile, "path" | "encContentHash">,
+  params: Omit<NewFile, "path" | "encContentHash">,
   encContentStream: Readable,
   encContentHash: Promise<string>,
 ) => {
@@ -104,7 +201,7 @@ export const uploadFile = async (
       throw new Error("Invalid checksum");
     }
 
-    const { id: fileId } = await FileRepo.registerFile({
+    const { id: fileId } = await registerFile({
       ...params,
       path,
       encContentHash: hash,

src/lib/server/services/hsk.ts

@@ -0,0 +1,31 @@
+import { error } from "@sveltejs/kit";
+import { IntegrityError } from "$lib/server/db/error";
+import { registerInitialHsk, getAllValidHsks } from "$lib/server/db/hsk";
+
+export const getHskList = async (userId: number) => {
+  const hsks = await getAllValidHsks(userId);
+  return {
+    encHsks: hsks.map(({ version, state, mekVersion, encHsk }) => ({
+      version,
+      state,
+      mekVersion,
+      encHsk,
+    })),
+  };
+};
+
+export const registerInitialActiveHsk = async (
+  userId: number,
+  createdBy: number,
+  mekVersion: number,
+  encHsk: string,
+) => {
+  try {
+    await registerInitialHsk(userId, createdBy, mekVersion, encHsk);
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "HSK already registered") {
+      error(409, "Initial HSK already registered");
+    }
+    throw e;
+  }
+};

src/lib/server/services/mek.ts

@@ -0,0 +1,38 @@
+import { error } from "@sveltejs/kit";
+import { setUserClientStateToActive } from "$lib/server/db/client";
+import { IntegrityError } from "$lib/server/db/error";
+import { registerInitialMek, getAllValidClientMeks } from "$lib/server/db/mek";
+import { verifyClientEncMekSig } from "$lib/server/modules/mek";
+
+export const getClientMekList = async (userId: number, clientId: number) => {
+  const clientMeks = await getAllValidClientMeks(userId, clientId);
+  return {
+    encMeks: clientMeks.map(({ version, state, encMek, encMekSig }) => ({
+      version,
+      state,
+      encMek,
+      encMekSig,
+    })),
+  };
+};
+
+export const registerInitialActiveMek = async (
+  userId: number,
+  createdBy: number,
+  encMek: string,
+  encMekSig: string,
+) => {
+  if (!(await verifyClientEncMekSig(userId, createdBy, 1, encMek, encMekSig))) {
+    error(400, "Invalid signature");
+  }
+
+  try {
+    await registerInitialMek(userId, createdBy, encMek, encMekSig);
+    await setUserClientStateToActive(userId, createdBy);
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "MEK already registered") {
+      error(409, "Initial MEK already registered");
+    }
+    throw e;
+  }
+};

src/lib/server/services/user.ts

@@ -0,0 +1,15 @@
+import { error } from "@sveltejs/kit";
+import { getUser, setUserNickname } from "$lib/server/db/user";
+
+export const getUserInformation = async (userId: number) => {
+  const user = await getUser(userId);
+  if (!user) {
+    error(500, "Invalid session id");
+  }
+
+  return { email: user.email, nickname: user.nickname };
+};
+
+export const changeNickname = async (userId: number, nickname: string) => {
+  await setUserNickname(userId, nickname);
+};

src/lib/services/auth.ts

@@ -1,5 +1,10 @@
+import { callPostApi } from "$lib/hooks";
 import { encodeToBase64, decryptChallenge, signMessageRSA } from "$lib/modules/crypto";
-import { trpc, isTRPCClientError } from "$trpc/client";
+import type {
+  SessionUpgradeRequest,
+  SessionUpgradeResponse,
+  SessionUpgradeVerifyRequest,
+} from "$lib/server/schemas";
 
 export const requestSessionUpgrade = async (
   encryptKeyBase64: string,
@@ -8,43 +13,27 @@ export const requestSessionUpgrade = async (
   signKey: CryptoKey,
   force = false,
 ) => {
-  let id, challenge;
-  try {
-    ({ id, challenge } = await trpc().auth.upgrade.mutate({
-      encPubKey: encryptKeyBase64,
-      sigPubKey: verifyKeyBase64,
-    }));
-  } catch (e) {
-    if (isTRPCClientError(e) && e.data?.code === "FORBIDDEN") {
-      return [false, "Unregistered client"] as const;
-    }
-    return [false] as const;
-  }
+  let res = await callPostApi<SessionUpgradeRequest>("/api/auth/upgradeSession", {
+    encPubKey: encryptKeyBase64,
+    sigPubKey: verifyKeyBase64,
+  });
+  if (res.status === 403) return [false, "Unregistered client"] as const;
+  else if (!res.ok) return [false] as const;
+
+  const { id, challenge }: SessionUpgradeResponse = await res.json();
   const answer = await decryptChallenge(challenge, decryptKey);
   const answerSig = await signMessageRSA(answer, signKey);
 
-  try {
-    await trpc().auth.verifyUpgrade.mutate({
-      id,
-      answerSig: encodeToBase64(answerSig),
-      force,
-    });
-  } catch (e) {
-    if (isTRPCClientError(e) && e.data?.code === "CONFLICT") {
-      return [false, "Already logged in"] as const;
-    }
-    return [false] as const;
-  }
-
-  return [true] as const;
+  res = await callPostApi<SessionUpgradeVerifyRequest>("/api/auth/upgradeSession/verify", {
+    id,
+    answerSig: encodeToBase64(answerSig),
+    force,
+  });
+  if (res.status === 409) return [false, "Already logged in"] as const;
+  else return [res.ok] as const;
 };
 
 export const requestLogout = async () => {
-  try {
-    await trpc().auth.logout.mutate();
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi("/api/auth/logout");
+  return res.ok;
 };

src/lib/services/category.ts

@@ -1,6 +1,7 @@
+import { callPostApi } from "$lib/hooks";
 import { generateDataKey, wrapDataKey, encryptString } from "$lib/modules/crypto";
+import type { CategoryCreateRequest, CategoryFileRemoveRequest } from "$lib/server/schemas";
 import type { MasterKey } from "$lib/stores";
-import { trpc } from "$trpc/client";
 
 export const requestCategoryCreation = async (
   name: string,
@@ -10,28 +11,21 @@ export const requestCategoryCreation = async (
   const { dataKey, dataKeyVersion } = await generateDataKey();
   const nameEncrypted = await encryptString(name, dataKey);
 
-  try {
-    await trpc().category.create.mutate({
-      parent: parentId,
-      mekVersion: masterKey.version,
-      dek: await wrapDataKey(dataKey, masterKey.key),
-      dekVersion: dataKeyVersion,
-      name: nameEncrypted.ciphertext,
-      nameIv: nameEncrypted.iv,
-    });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi<CategoryCreateRequest>("/api/category/create", {
+    parent: parentId,
+    mekVersion: masterKey.version,
+    dek: await wrapDataKey(dataKey, masterKey.key),
+    dekVersion: dataKeyVersion.toISOString(),
+    name: nameEncrypted.ciphertext,
+    nameIv: nameEncrypted.iv,
+  });
+  return res.ok;
 };
 
 export const requestFileRemovalFromCategory = async (fileId: number, categoryId: number) => {
-  try {
-    await trpc().category.removeFile.mutate({ id: categoryId, file: fileId });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi<CategoryFileRemoveRequest>(
+    `/api/category/${categoryId}/file/remove`,
+    { file: fileId },
+  );
+  return res.ok;
 };

src/lib/services/file.ts

@@ -1,3 +1,4 @@
+import { callGetApi } from "$lib/hooks";
 import { getAllFileInfos } from "$lib/indexedDB/filesystem";
 import { decryptData } from "$lib/modules/crypto";
 import {
@@ -10,8 +11,11 @@ import {
   downloadFile,
 } from "$lib/modules/file";
 import { getThumbnailUrl } from "$lib/modules/thumbnail";
-import type { FileThumbnailUploadRequest } from "$lib/server/schemas";
-import { trpc } from "$trpc/client";
+import type {
+  FileThumbnailInfoResponse,
+  FileThumbnailUploadRequest,
+  FileListResponse,
+} from "$lib/server/schemas";
 
 export const requestFileDownload = async (
   fileId: number,
@@ -44,20 +48,16 @@ export const requestFileThumbnailUpload = async (
   return await fetch(`/api/file/${fileId}/thumbnail/upload`, { method: "POST", body: form });
 };
 
-export const requestFileThumbnailDownload = async (fileId: number, dataKey?: CryptoKey) => {
+export const requestFileThumbnailDownload = async (fileId: number, dataKey: CryptoKey) => {
   const cache = await getFileThumbnailCache(fileId);
-  if (cache || !dataKey) return cache;
+  if (cache) return cache;
 
-  let thumbnailInfo;
-  try {
-    thumbnailInfo = await trpc().file.thumbnail.query({ id: fileId });
-  } catch {
-    // TODO: Error Handling
-    return null;
-  }
-  const { contentIv: thumbnailEncryptedIv } = thumbnailInfo;
+  let res = await callGetApi(`/api/file/${fileId}/thumbnail`);
+  if (!res.ok) return null;
 
-  const res = await fetch(`/api/file/${fileId}/thumbnail/download`);
+  const { contentIv: thumbnailEncryptedIv }: FileThumbnailInfoResponse = await res.json();
+
+  res = await callGetApi(`/api/file/${fileId}/thumbnail/download`);
   if (!res.ok) return null;
 
   const thumbnailEncrypted = await res.arrayBuffer();
@@ -68,14 +68,10 @@ export const requestFileThumbnailDownload = async (fileId: number, dataKey?: Cry
 };
 
 export const requestDeletedFilesCleanup = async () => {
-  let liveFiles;
-  try {
-    liveFiles = await trpc().file.list.query();
-  } catch {
-    // TODO: Error Handling
-    return;
-  }
+  const res = await callGetApi("/api/file/list");
+  if (!res.ok) return;
 
+  const { files: liveFiles }: FileListResponse = await res.json();
   const liveFilesSet = new Set(liveFiles);
   const maybeCachedFiles = await getAllFileInfos();
 

src/lib/services/key.ts

@@ -1,3 +1,4 @@
+import { callGetApi, callPostApi } from "$lib/hooks";
 import { storeMasterKeys } from "$lib/indexedDB";
 import {
   encodeToBase64,
@@ -8,9 +9,16 @@ import {
   signMasterKeyWrapped,
   verifyMasterKeyWrapped,
 } from "$lib/modules/crypto";
+import type {
+  ClientRegisterRequest,
+  ClientRegisterResponse,
+  ClientRegisterVerifyRequest,
+  InitialHmacSecretRegisterRequest,
+  MasterKeyListResponse,
+  InitialMasterKeyRegisterRequest,
+} from "$lib/server/schemas";
 import { requestSessionUpgrade } from "$lib/services/auth";
 import { masterKeyStore, type ClientKeys } from "$lib/stores";
-import { trpc, isTRPCClientError } from "$trpc/client";
 
 export const requestClientRegistration = async (
   encryptKeyBase64: string,
@@ -18,22 +26,21 @@ export const requestClientRegistration = async (
   verifyKeyBase64: string,
   signKey: CryptoKey,
 ) => {
-  try {
-    const { id, challenge } = await trpc().client.register.mutate({
-      encPubKey: encryptKeyBase64,
-      sigPubKey: verifyKeyBase64,
-    });
-    const answer = await decryptChallenge(challenge, decryptKey);
-    const answerSig = await signMessageRSA(answer, signKey);
-    await trpc().client.verify.mutate({
-      id,
-      answerSig: encodeToBase64(answerSig),
-    });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  let res = await callPostApi<ClientRegisterRequest>("/api/client/register", {
+    encPubKey: encryptKeyBase64,
+    sigPubKey: verifyKeyBase64,
+  });
+  if (!res.ok) return false;
+
+  const { id, challenge }: ClientRegisterResponse = await res.json();
+  const answer = await decryptChallenge(challenge, decryptKey);
+  const answerSig = await signMessageRSA(answer, signKey);
+
+  res = await callPostApi<ClientRegisterVerifyRequest>("/api/client/register/verify", {
+    id,
+    answerSig: encodeToBase64(answerSig),
+  });
+  return res.ok;
 };
 
 export const requestClientRegistrationAndSessionUpgrade = async (
@@ -66,14 +73,10 @@ export const requestClientRegistrationAndSessionUpgrade = async (
 };
 
 export const requestMasterKeyDownload = async (decryptKey: CryptoKey, verifyKey: CryptoKey) => {
-  let masterKeysWrapped;
-  try {
-    masterKeysWrapped = await trpc().mek.list.query();
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callGetApi("/api/mek/list");
+  if (!res.ok) return false;
 
+  const { meks: masterKeysWrapped }: MasterKeyListResponse = await res.json();
   const masterKeys = await Promise.all(
     masterKeysWrapped.map(
       async ({ version, state, mek: masterKeyWrapped, mekSig: masterKeyWrappedSig }) => {
@@ -105,27 +108,17 @@ export const requestInitialMasterKeyAndHmacSecretRegistration = async (
   hmacSecretWrapped: string,
   signKey: CryptoKey,
 ) => {
-  try {
-    await trpc().mek.registerInitial.mutate({
-      mek: masterKeyWrapped,
-      mekSig: await signMasterKeyWrapped(masterKeyWrapped, 1, signKey),
-    });
-  } catch (e) {
-    if (isTRPCClientError(e) && (e.data?.code === "FORBIDDEN" || e.data?.code === "CONFLICT")) {
-      return true;
-    }
-    // TODO: Error Handling
-    return false;
+  let res = await callPostApi<InitialMasterKeyRegisterRequest>("/api/mek/register/initial", {
+    mek: masterKeyWrapped,
+    mekSig: await signMasterKeyWrapped(masterKeyWrapped, 1, signKey),
+  });
+  if (!res.ok) {
+    return res.status === 403 || res.status === 409;
   }
 
-  try {
-    await trpc().hsk.registerInitial.mutate({
-      mekVersion: 1,
-      hsk: hmacSecretWrapped,
-    });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  res = await callPostApi<InitialHmacSecretRegisterRequest>("/api/hsk/register/initial", {
+    mekVersion: 1,
+    hsk: hmacSecretWrapped,
+  });
+  return res.ok;
 };

src/lib/utils/index.ts

@@ -1,3 +0,0 @@
-export * from "./format";
-export * from "./gotoStateful";
-export * from "./sort";

src/lib/utils/sort.ts

@@ -1,57 +0,0 @@
-interface SortEntry {
-  name?: string;
-  date?: Date;
-}
-
-export enum SortBy {
-  NAME_ASC,
-  NAME_DESC,
-  DATE_ASC,
-  DATE_DESC,
-}
-
-type SortFunc = (a: SortEntry, b: SortEntry) => number;
-
-const collator = new Intl.Collator(undefined, { numeric: true, sensitivity: "base" });
-
-const sortByNameAsc: SortFunc = ({ name: a }, { name: b }) => {
-  if (a && b) return collator.compare(a, b);
-  if (a) return -1;
-  if (b) return 1;
-  return 0;
-};
-
-const sortByNameDesc: SortFunc = (a, b) => -sortByNameAsc(a, b);
-
-const sortByDateAsc: SortFunc = ({ date: a }, { date: b }) => {
-  if (a && b) return a.getTime() - b.getTime();
-  if (a) return -1;
-  if (b) return 1;
-  return 0;
-};
-
-const sortByDateDesc: SortFunc = (a, b) => -sortByDateAsc(a, b);
-
-export const sortEntries = <T extends SortEntry>(entries: T[], sortBy: SortBy) => {
-  let sortFunc: SortFunc;
-
-  switch (sortBy) {
-    case SortBy.NAME_ASC:
-      sortFunc = sortByNameAsc;
-      break;
-    case SortBy.NAME_DESC:
-      sortFunc = sortByNameDesc;
-      break;
-    case SortBy.DATE_ASC:
-      sortFunc = sortByDateAsc;
-      break;
-    case SortBy.DATE_DESC:
-      sortFunc = sortByDateDesc;
-      break;
-    default:
-      const exhaustive: never = sortBy;
-      sortFunc = exhaustive;
-  }
-
-  entries.sort(sortFunc);
-};

src/routes/(fullscreen)/auth/changePassword/service.ts

@@ -1,11 +1,10 @@
-import { trpc } from "$trpc/client";
+import { callPostApi } from "$lib/hooks";
+import type { PasswordChangeRequest } from "$lib/server/schemas";
 
 export const requestPasswordChange = async (oldPassword: string, newPassword: string) => {
-  try {
-    await trpc().auth.changePassword.mutate({ oldPassword, newPassword });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi<PasswordChangeRequest>("/api/auth/changePassword", {
+    oldPassword,
+    newPassword,
+  });
+  return res.ok;
 };

src/routes/(fullscreen)/auth/login/service.ts

@@ -1,4 +1,5 @@
-import { trpc } from "$trpc/client";
+import { callPostApi } from "$lib/hooks";
+import type { LoginRequest } from "$lib/server/schemas";
 
 export { requestLogout } from "$lib/services/auth";
 export { requestDeletedFilesCleanup } from "$lib/services/file";
@@ -8,11 +9,6 @@ export {
 } from "$lib/services/key";
 
 export const requestLogin = async (email: string, password: string) => {
-  try {
-    await trpc().auth.login.mutate({ email, password });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi<LoginRequest>("/api/auth/login", { email, password });
+  return res.ok;
 };

src/routes/(fullscreen)/file/[id]/+page.svelte

@@ -3,15 +3,10 @@
   import { untrack } from "svelte";
   import { get, type Writable } from "svelte/store";
   import { goto } from "$app/navigation";
-  import { page } from "$app/state";
   import { FullscreenDiv } from "$lib/components/atoms";
   import { Categories, IconEntryButton, TopBar } from "$lib/components/molecules";
-  import {
-    getFileInfo,
-    getCategoryInfo,
-    type FileInfo,
-    type CategoryInfo,
-  } from "$lib/modules/filesystem";
+  import { getCategoryInfo, type CategoryInfo } from "$lib/modules/filesystem2";
+  import { getFileInfo } from "$lib/modules/filesystem2";
   import { captureVideoThumbnail } from "$lib/modules/thumbnail";
   import { fileDownloadStatusStore, isFileDownloading, masterKeyStore } from "$lib/stores";
   import AddToCategoryBottomSheet from "./AddToCategoryBottomSheet.svelte";
@@ -22,19 +17,15 @@
     requestThumbnailUpload,
     requestFileAdditionToCategory,
   } from "./service";
-  import TopBarMenu from "./TopBarMenu.svelte";
 
-  import IconMoreVert from "~icons/material-symbols/more-vert";
   import IconCamera from "~icons/material-symbols/camera";
   import IconClose from "~icons/material-symbols/close";
   import IconAddCircle from "~icons/material-symbols/add-circle";
 
   let { data } = $props();
 
-  let info: Writable<FileInfo | null> | undefined = $state();
-  let categories: Writable<CategoryInfo | null>[] = $state([]);
+  let info = $derived(getFileInfo(data.id, $masterKeyStore?.get(1)?.key!));
 
-  let isMenuOpen = $state(false);
   let isAddToCategoryBottomSheetOpen = $state(false);
 
   let downloadStatus = $derived(
@@ -46,26 +37,30 @@
 
   let isDownloadRequested = $state(false);
   let viewerType: "image" | "video" | undefined = $state();
-  let fileBlob: Blob | undefined = $state();
   let fileBlobUrl: string | undefined = $state();
+  let heicBlob: Blob | undefined = $state();
   let videoElement: HTMLVideoElement | undefined = $state();
 
   const updateViewer = async (buffer: ArrayBuffer, contentType: string) => {
-    fileBlob = new Blob([buffer], { type: contentType });
-    fileBlobUrl = URL.createObjectURL(fileBlob);
+    const fileBlob = new Blob([buffer], { type: contentType });
+    if (viewerType) {
+      fileBlobUrl = URL.createObjectURL(fileBlob);
+      heicBlob = contentType === "image/heic" ? fileBlob : undefined;
+    }
     return fileBlob;
   };
 
   const convertHeicToJpeg = async () => {
-    if (fileBlob?.type !== "image/heic") return;
+    if (!heicBlob) return;
 
     URL.revokeObjectURL(fileBlobUrl!);
     fileBlobUrl = undefined;
 
     const { default: heic2any } = await import("heic2any");
     fileBlobUrl = URL.createObjectURL(
-      (await heic2any({ blob: fileBlob, toType: "image/jpeg" })) as Blob,
+      (await heic2any({ blob: heicBlob, toType: "image/jpeg" })) as Blob,
     );
+    heicBlob = undefined;
   };
 
   const updateThumbnail = async (dataKey: CryptoKey, dataKeyVersion: Date) => {
@@ -85,19 +80,14 @@
   };
 
   $effect(() => {
-    info = getFileInfo(data.id, $masterKeyStore?.get(1)?.key!);
+    data.id;
     isDownloadRequested = false;
     viewerType = undefined;
   });
 
   $effect(() => {
-    categories =
-      $info?.categoryIds.map((id) => getCategoryInfo(id, $masterKeyStore?.get(1)?.key!)) ?? [];
-  });
-
-  $effect(() => {
-    if ($info && $info.dataKey && $info.contentIv) {
-      const contentType = $info.contentType;
+    if ($info.data?.dataKey && $info.data?.contentIv) {
+      const contentType = $info.data.contentType;
       if (contentType.startsWith("image")) {
         viewerType = "image";
       } else if (contentType.startsWith("video")) {
@@ -107,21 +97,23 @@
       untrack(() => {
         if (!downloadStatus && !isDownloadRequested) {
           isDownloadRequested = true;
-          requestFileDownload(data.id, $info.contentIv!, $info.dataKey!).then(async (buffer) => {
-            const blob = await updateViewer(buffer, contentType);
-            if (!viewerType) {
-              FileSaver.saveAs(blob, $info.name);
-            }
-          });
+          requestFileDownload(data.id, $info.data.contentIv!, $info.data.dataKey!).then(
+            async (buffer) => {
+              const blob = await updateViewer(buffer, contentType);
+              if (!viewerType) {
+                FileSaver.saveAs(blob, $info.data.name);
+              }
+            },
+          );
         }
       });
     }
   });
 
   $effect(() => {
-    if ($info && $downloadStatus?.status === "decrypted") {
+    if ($info.status === "success" && $downloadStatus?.status === "decrypted") {
       untrack(
-        () => !isDownloadRequested && updateViewer($downloadStatus.result!, $info.contentType),
+        () => !isDownloadRequested && updateViewer($downloadStatus.result!, $info.data.contentType),
       );
     }
   });
@@ -133,28 +125,11 @@
   <title>파일</title>
 </svelte:head>
 
-<TopBar title={$info?.name}>
-  <!-- svelte-ignore a11y_no_static_element_interactions -->
-  <!-- svelte-ignore a11y_click_events_have_key_events -->
-  <div onclick={(e) => e.stopPropagation()}>
-    <button
-      onclick={() => (isMenuOpen = !isMenuOpen)}
-      class="w-[2.3rem] flex-shrink-0 rounded-full p-1 active:bg-black active:bg-opacity-[0.04]"
-    >
-      <IconMoreVert class="text-2xl" />
-    </button>
-    <TopBarMenu
-      bind:isOpen={isMenuOpen}
-      directoryId={page.url.searchParams.get("from") === "category" ? $info?.parentId : undefined}
-      {fileBlob}
-      filename={$info?.name}
-    />
-  </div>
-</TopBar>
+<TopBar title={$info.data?.name} />
 <FullscreenDiv>
   <div class="space-y-4 pb-4">
     <DownloadStatus status={downloadStatus} />
-    {#if $info && viewerType}
+    {#if $info.status === "success" && viewerType}
       <div class="flex w-full justify-center">
         {#snippet viewerLoading(message: string)}
           <p class="text-gray-500">{message}</p>
@@ -162,7 +137,7 @@
 
         {#if viewerType === "image"}
           {#if fileBlobUrl}
-            <img src={fileBlobUrl} alt={$info.name} onerror={convertHeicToJpeg} />
+            <img src={fileBlobUrl} alt={$info.data.name} onerror={convertHeicToJpeg} />
           {:else}
             {@render viewerLoading("이미지를 불러오고 있어요.")}
           {/if}
@@ -173,7 +148,7 @@
               <video bind:this={videoElement} src={fileBlobUrl} controls muted></video>
               <IconEntryButton
                 icon={IconCamera}
-                onclick={() => updateThumbnail($info.dataKey!, $info.dataKeyVersion!)}
+                onclick={() => updateThumbnail($info.data.dataKey!, $info.data.dataKeyVersion!)}
                 class="w-full"
               >
                 이 장면을 썸네일로 설정하기
@@ -189,7 +164,7 @@
       <p class="text-lg font-bold">카테고리</p>
       <div class="space-y-1">
         <Categories
-          {categories}
+          categoryIds={$info.data?.categoryIds ?? []}
           categoryMenuIcon={IconClose}
           onCategoryClick={({ id }) => goto(`/category/${id}`)}
           onCategoryMenuClick={({ id }) => removeFromCategory(id)}

src/routes/(fullscreen)/file/[id]/AddToCategoryBottomSheet.svelte

@@ -1,9 +1,8 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
   import { BottomDiv, BottomSheet, Button, FullscreenDiv } from "$lib/components/atoms";
   import { SubCategories } from "$lib/components/molecules";
   import { CategoryCreateModal } from "$lib/components/organisms";
-  import { getCategoryInfo, type CategoryInfo } from "$lib/modules/filesystem";
+  import { getCategoryInfo, type CategoryInfoStore } from "$lib/modules/filesystem2";
   import { masterKeyStore } from "$lib/stores";
   import { requestCategoryCreation } from "./service";
 
@@ -14,7 +13,7 @@
 
   let { onAddToCategoryClick, isOpen = $bindable() }: Props = $props();
 
-  let category: Writable<CategoryInfo | null> | undefined = $state();
+  let category: CategoryInfoStore | undefined = $state();
 
   let isCategoryCreateModalOpen = $state(false);
 
@@ -25,20 +24,20 @@
   });
 </script>
 
-{#if $category}
+{#if $category?.status === "success"}
   <BottomSheet bind:isOpen class="flex flex-col">
     <FullscreenDiv>
       <SubCategories
         class="py-4"
-        info={$category}
+        info={$category.data}
         onSubCategoryClick={({ id }) =>
           (category = getCategoryInfo(id, $masterKeyStore?.get(1)?.key!))}
         onSubCategoryCreateClick={() => (isCategoryCreateModalOpen = true)}
         subCategoryCreatePosition="top"
       />
-      {#if $category.id !== "root"}
+      {#if $category.data.id !== "root"}
         <BottomDiv>
-          <Button onclick={() => onAddToCategoryClick($category.id)} class="w-full">
+          <Button onclick={() => onAddToCategoryClick($category.data.id as number)} class="w-full">
             이 카테고리에 추가하기
           </Button>
         </BottomDiv>
@@ -50,8 +49,8 @@
 <CategoryCreateModal
   bind:isOpen={isCategoryCreateModalOpen}
   onCreateClick={async (name: string) => {
-    if (await requestCategoryCreation(name, $category!.id, $masterKeyStore?.get(1)!)) {
-      category = getCategoryInfo($category!.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+    if (await requestCategoryCreation(name, $category!.data!.id, $masterKeyStore?.get(1)!)) {
+      category = getCategoryInfo($category!.data!.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
       return true;
     }
     return false;

src/routes/(fullscreen)/file/[id]/DownloadStatus.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import type { Writable } from "svelte/store";
+  import { formatNetworkSpeed } from "$lib/modules/util";
   import { isFileDownloading, type FileDownloadStatus } from "$lib/stores";
-  import { formatNetworkSpeed } from "$lib/utils";
 
   interface Props {
     status?: Writable<FileDownloadStatus>;

src/routes/(fullscreen)/file/[id]/TopBarMenu.svelte

@@ -1,59 +0,0 @@
-<script lang="ts">
-  import FileSaver from "file-saver";
-  import type { Component } from "svelte";
-  import type { SvelteHTMLElements } from "svelte/elements";
-  import { fly } from "svelte/transition";
-  import { goto } from "$app/navigation";
-
-  import IconFolderOpen from "~icons/material-symbols/folder-open";
-  import IconCloudDownload from "~icons/material-symbols/cloud-download";
-
-  interface Props {
-    directoryId?: "root" | number;
-    fileBlob?: Blob;
-    filename?: string;
-    isOpen: boolean;
-  }
-
-  let { directoryId, fileBlob, filename, isOpen = $bindable() }: Props = $props();
-</script>
-
-<svelte:window onclick={() => (isOpen = false)} />
-
-{#if isOpen && (directoryId || fileBlob)}
-  <div
-    class="absolute right-2 top-full z-20 space-y-1 rounded-lg bg-white px-1 py-2 shadow-2xl"
-    transition:fly={{ y: -8, duration: 200 }}
-  >
-    <p class="px-3 pt-2 text-sm font-semibold text-gray-600">더보기</p>
-    <div class="flex flex-col">
-      {#snippet menuButton(
-        Icon: Component<SvelteHTMLElements["svg"]>,
-        text: string,
-        onclick: () => void,
-      )}
-        <button {onclick} class="rounded-xl active:bg-gray-100">
-          <div
-            class="flex items-center gap-x-3 px-3 py-2 text-lg text-gray-700 transition active:scale-95"
-          >
-            <Icon />
-            <p class="font-medium">{text}</p>
-          </div>
-        </button>
-      {/snippet}
-
-      {#if directoryId}
-        {@render menuButton(IconFolderOpen, "폴더에서 보기", () =>
-          goto(
-            directoryId === "root" ? "/directory?from=file" : `/directory/${directoryId}?from=file`,
-          ),
-        )}
-      {/if}
-      {#if fileBlob}
-        {@render menuButton(IconCloudDownload, "다운로드", () => {
-          FileSaver.saveAs(fileBlob, filename);
-        })}
-      {/if}
-    </div>
-  </div>
-{/if}

src/routes/(fullscreen)/file/[id]/service.ts

@@ -1,7 +1,8 @@
+import { callPostApi } from "$lib/hooks";
 import { encryptData } from "$lib/modules/crypto";
 import { storeFileThumbnailCache } from "$lib/modules/file";
+import type { CategoryFileAddRequest } from "$lib/server/schemas";
 import { requestFileThumbnailUpload } from "$lib/services/file";
-import { trpc } from "$trpc/client";
 
 export { requestCategoryCreation, requestFileRemovalFromCategory } from "$lib/services/category";
 export { requestFileDownload } from "$lib/services/file";
@@ -22,11 +23,8 @@ export const requestThumbnailUpload = async (
 };
 
 export const requestFileAdditionToCategory = async (fileId: number, categoryId: number) => {
-  try {
-    await trpc().category.addFile.mutate({ id: categoryId, file: fileId });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi<CategoryFileAddRequest>(`/api/category/${categoryId}/file/add`, {
+    file: fileId,
+  });
+  return res.ok;
 };

src/routes/(fullscreen)/file/downloads/File.svelte

@@ -1,8 +1,8 @@
 <script lang="ts">
   import { get, type Writable } from "svelte/store";
-  import { getFileInfo, type FileInfo } from "$lib/modules/filesystem";
+  import { getFileInfo } from "$lib/modules/filesystem2";
+  import { formatNetworkSpeed } from "$lib/modules/util";
   import { masterKeyStore, type FileDownloadStatus } from "$lib/stores";
-  import { formatNetworkSpeed } from "$lib/utils";
 
   import IconCloud from "~icons/material-symbols/cloud";
   import IconCloudDownload from "~icons/material-symbols/cloud-download";
@@ -17,14 +17,10 @@
 
   let { status }: Props = $props();
 
-  let fileInfo: Writable<FileInfo | null> | undefined = $state();
-
-  $effect(() => {
-    fileInfo = getFileInfo(get(status).id, $masterKeyStore?.get(1)?.key!);
-  });
+  let fileInfo = $derived(getFileInfo(get(status).id, $masterKeyStore?.get(1)?.key!));
 </script>
 
-{#if $fileInfo}
+{#if $fileInfo.status === "success"}
   <div class="flex h-14 items-center gap-x-4 p-2">
     <div class="flex-shrink-0 text-lg text-gray-600">
       {#if $status.status === "download-pending"}
@@ -42,8 +38,8 @@
       {/if}
     </div>
     <div class="flex-grow overflow-hidden">
-      <p title={$fileInfo.name} class="truncate font-medium">
-        {$fileInfo.name}
+      <p title={$fileInfo.data.name} class="truncate font-medium">
+        {$fileInfo.data.name}
       </p>
       <p class="text-xs text-gray-800">
         {#if $status.status === "download-pending"}

src/routes/(fullscreen)/file/uploads/File.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import type { Writable } from "svelte/store";
+  import { formatNetworkSpeed } from "$lib/modules/util";
   import type { FileUploadStatus } from "$lib/stores";
-  import { formatNetworkSpeed } from "$lib/utils";
 
   import IconPending from "~icons/material-symbols/pending";
   import IconLockClock from "~icons/material-symbols/lock-clock";

src/routes/(fullscreen)/gallery/+page.server.ts

@@ -1,7 +0,0 @@
-import { createCaller } from "$trpc/router.server";
-import type { PageServerLoad } from "./$types";
-
-export const load: PageServerLoad = async (event) => {
-  const files = await createCaller(event).file.list();
-  return { files };
-};

src/routes/(fullscreen)/gallery/+page.svelte

@@ -1,26 +0,0 @@
-<script lang="ts">
-  import type { Writable } from "svelte/store";
-  import { goto } from "$app/navigation";
-  import { FullscreenDiv } from "$lib/components/atoms";
-  import { TopBar } from "$lib/components/molecules";
-  import { Gallery } from "$lib/components/organisms";
-  import { getFileInfo, type FileInfo } from "$lib/modules/filesystem";
-  import { masterKeyStore } from "$lib/stores";
-
-  let { data } = $props();
-
-  let files: Writable<FileInfo | null>[] = $state([]);
-
-  $effect(() => {
-    files = data.files.map((file) => getFileInfo(file, $masterKeyStore?.get(1)?.key!));
-  });
-</script>
-
-<svelte:head>
-  <title>사진 및 동영상</title>
-</svelte:head>
-
-<TopBar title="사진 및 동영상" />
-<FullscreenDiv>
-  <Gallery {files} onFileClick={({ id }) => goto(`/file/${id}`)} />
-</FullscreenDiv>

src/routes/(fullscreen)/key/export/+page.ts

@@ -1,5 +1,5 @@
 import { error } from "@sveltejs/kit";
-import { keyExportState } from "$lib/utils";
+import { keyExportState } from "$lib/hooks/gotoStateful";
 import type { PageLoad } from "./$types";
 
 export const load: PageLoad = async () => {

src/routes/(fullscreen)/key/generate/+page.svelte

@@ -4,9 +4,9 @@
   import { BottomDiv, Button, FullscreenDiv, TextButton } from "$lib/components/atoms";
   import { TitledDiv } from "$lib/components/molecules";
   import { ForceLoginModal } from "$lib/components/organisms";
+  import { gotoStateful } from "$lib/hooks";
   import { storeClientKeys } from "$lib/modules/key";
   import { clientKeyStore } from "$lib/stores";
-  import { gotoStateful } from "$lib/utils";
   import Order from "./Order.svelte";
   import {
     generateClientKeys,

src/routes/(fullscreen)/settings/cache/+page.svelte

@@ -1,18 +1,17 @@
 <script lang="ts">
   import { onMount } from "svelte";
-  import type { Writable } from "svelte/store";
   import { FullscreenDiv } from "$lib/components/atoms";
   import { TopBar } from "$lib/components/molecules";
   import type { FileCacheIndex } from "$lib/indexedDB";
   import { getFileCacheIndex, deleteFileCache as doDeleteFileCache } from "$lib/modules/file";
-  import { getFileInfo, type FileInfo } from "$lib/modules/filesystem";
+  import { getFileInfo, type FileInfoStore } from "$lib/modules/filesystem2";
+  import { formatFileSize } from "$lib/modules/util";
   import { masterKeyStore } from "$lib/stores";
-  import { formatFileSize } from "$lib/utils";
   import File from "./File.svelte";
 
   interface FileCache {
     index: FileCacheIndex;
-    fileInfo: Writable<FileInfo | null>;
+    fileInfo: FileInfoStore;
   }
 
   let fileCache: FileCache[] | undefined = $state();

src/routes/(fullscreen)/settings/cache/File.svelte

@@ -1,8 +1,7 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
   import type { FileCacheIndex } from "$lib/indexedDB";
-  import type { FileInfo } from "$lib/modules/filesystem";
-  import { formatDate, formatFileSize } from "$lib/utils";
+  import type { FileInfoStore } from "$lib/modules/filesystem2";
+  import { formatDate, formatFileSize } from "$lib/modules/util";
 
   import IconDraft from "~icons/material-symbols/draft";
   import IconScanDelete from "~icons/material-symbols/scan-delete";
@@ -10,7 +9,7 @@
 
   interface Props {
     index: FileCacheIndex;
-    info: Writable<FileInfo | null>;
+    info: FileInfoStore;
     onDeleteClick: (fileId: number) => void;
   }
 
@@ -28,8 +27,8 @@
     </div>
   {/if}
   <div class="flex-grow overflow-hidden">
-    {#if $info}
-      <p title={$info.name} class="truncate font-medium">{$info.name}</p>
+    {#if $info.status === "success"}
+      <p title={$info.data.name} class="truncate font-medium">{$info.data.name}</p>
     {:else}
       <p class="font-medium">삭제된 파일</p>
     {/if}

src/routes/(fullscreen)/settings/thumbnail/+page.server.ts

@@ -1,7 +0,0 @@
-import { createCaller } from "$trpc/router.server";
-import type { PageServerLoad } from "./$types";
-
-export const load: PageServerLoad = async (event) => {
-  const files = await createCaller(event).file.listWithoutThumbnail();
-  return { files };
-};

src/routes/(fullscreen)/settings/thumbnail/+page.svelte

@@ -5,7 +5,7 @@
   import { BottomDiv, Button, FullscreenDiv } from "$lib/components/atoms";
   import { IconEntryButton, TopBar } from "$lib/components/molecules";
   import { deleteAllFileThumbnailCaches } from "$lib/modules/file";
-  import { getFileInfo } from "$lib/modules/filesystem";
+  import { getFileInfo } from "$lib/modules/filesystem2";
   import { masterKeyStore } from "$lib/stores";
   import File from "./File.svelte";
   import {
@@ -21,8 +21,8 @@
   const generateAllThumbnails = () => {
     persistentStates.files.forEach(({ info }) => {
       const fileInfo = get(info);
-      if (fileInfo) {
-        requestThumbnailGeneration(fileInfo);
+      if (fileInfo.data) {
+        requestThumbnailGeneration(fileInfo.data);
       }
     });
   };

src/routes/(fullscreen)/settings/thumbnail/+page.ts

@@ -0,0 +1,14 @@
+import { error } from "@sveltejs/kit";
+import { callPostApi } from "$lib/hooks";
+import type { MissingThumbnailFileScanResponse } from "$lib/server/schemas";
+import type { PageLoad } from "./$types";
+
+export const load: PageLoad = async ({ fetch }) => {
+  const res = await callPostApi("/api/file/scanMissingThumbnails", undefined, { fetch });
+  if (!res.ok) {
+    error(500, "Internal server error");
+  }
+
+  const { files }: MissingThumbnailFileScanResponse = await res.json();
+  return { files };
+};

src/routes/(fullscreen)/settings/thumbnail/File.svelte

@@ -13,14 +13,14 @@
   import type { Writable } from "svelte/store";
   import { ActionEntryButton } from "$lib/components/atoms";
   import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import type { FileInfo } from "$lib/modules/filesystem";
-  import { formatDateTime } from "$lib/utils";
+  import type { FileInfo, FileInfoStore } from "$lib/modules/filesystem2";
+  import { formatDateTime } from "$lib/modules/util";
   import type { GenerationStatus } from "./service.svelte";
 
   import IconCamera from "~icons/material-symbols/camera";
 
   interface Props {
-    info: Writable<FileInfo | null>;
+    info: FileInfoStore;
     onclick: (selectedFile: FileInfo) => void;
     onGenerateThumbnailClick: (selectedFile: FileInfo) => void;
     generationStatus?: Writable<GenerationStatus>;
@@ -29,18 +29,18 @@
   let { info, onclick, onGenerateThumbnailClick, generationStatus }: Props = $props();
 </script>
 
-{#if $info}
+{#if $info.status === "success"}
   <ActionEntryButton
     class="h-14"
-    onclick={() => onclick($info)}
+    onclick={() => onclick($info.data)}
     actionButtonIcon={!$generationStatus || $generationStatus === "error" ? IconCamera : undefined}
-    onActionButtonClick={() => onGenerateThumbnailClick($info)}
+    onActionButtonClick={() => onGenerateThumbnailClick($info.data)}
     actionButtonClass="text-gray-800"
   >
     {@const subtext =
       $generationStatus && $generationStatus !== "uploaded"
         ? subtexts[$generationStatus]
-        : formatDateTime($info.createdAt ?? $info.lastModifiedAt)}
-    <DirectoryEntryLabel type="file" name={$info.name} {subtext} />
+        : formatDateTime($info.data.createdAt ?? $info.data.lastModifiedAt)}
+    <DirectoryEntryLabel type="file" name={$info.data.name} {subtext} />
   </ActionEntryButton>
 {/if}

src/routes/(fullscreen)/settings/thumbnail/service.svelte.ts

@@ -2,7 +2,7 @@ import { limitFunction } from "p-limit";
 import { get, writable, type Writable } from "svelte/store";
 import { encryptData } from "$lib/modules/crypto";
 import { storeFileThumbnailCache } from "$lib/modules/file";
-import type { FileInfo } from "$lib/modules/filesystem";
+import type { FileInfo, FileInfoStore } from "$lib/modules/filesystem2";
 import { generateThumbnail as doGenerateThumbnail } from "$lib/modules/thumbnail";
 import { requestFileDownload, requestFileThumbnailUpload } from "$lib/services/file";
 
@@ -17,7 +17,7 @@ export type GenerationStatus =
 
 interface File {
   id: number;
-  info: Writable<FileInfo | null>;
+  info: FileInfoStore;
   status?: Writable<GenerationStatus>;
 }
 

src/routes/(main)/BottomBar.svelte

@@ -22,7 +22,7 @@
   <AdaptiveDiv class="flex justify-evenly px-4 py-2">
     {#each pages as { path, label, icon: Icon }}
       <button
-        onclick={() => goto(path, { replaceState: true })}
+        onclick={() => goto(path)}
         class={[
           "w-16 active:rounded-xl active:bg-gray-100",
           !page.url.pathname.startsWith(path) && "text-gray-600",

src/routes/(main)/category/[[id]]/+page.svelte

@@ -1,9 +1,8 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
   import { goto } from "$app/navigation";
   import { TopBar } from "$lib/components/molecules";
   import { Category, CategoryCreateModal } from "$lib/components/organisms";
-  import { getCategoryInfo, updateCategoryInfo, type CategoryInfo } from "$lib/modules/filesystem";
+  import { getCategoryInfo, useCategoryFileRecursionToggle } from "$lib/modules/filesystem2";
   import { masterKeyStore } from "$lib/stores";
   import CategoryDeleteModal from "./CategoryDeleteModal.svelte";
   import CategoryMenuBottomSheet from "./CategoryMenuBottomSheet.svelte";
@@ -19,9 +18,9 @@
   let { data } = $props();
   let context = createContext();
 
-  let info: Writable<CategoryInfo | null> | undefined = $state();
-
-  let isFileRecursive: boolean | undefined = $state();
+  let info = $derived(getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!));
+  let toggleFileRecursion = useCategoryFileRecursionToggle();
+  let isFileRecursive = $derived($info.data?.isFileRecursive);
 
   let isCategoryCreateModalOpen = $state(false);
   let isCategoryMenuBottomSheetOpen = $state(false);
@@ -29,19 +28,8 @@
   let isCategoryDeleteModalOpen = $state(false);
 
   $effect(() => {
-    info = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
-    isFileRecursive = undefined;
-  });
-
-  $effect(() => {
-    if ($info && isFileRecursive === undefined) {
-      isFileRecursive = $info.isFileRecursive ?? false;
-    }
-  });
-
-  $effect(() => {
-    if (data.id !== "root" && $info?.isFileRecursive !== isFileRecursive) {
-      updateCategoryInfo(data.id as number, { isFileRecursive });
+    if (isFileRecursive !== undefined && $info.data?.isFileRecursive !== isFileRecursive) {
+      $toggleFileRecursion.mutate({ id: data.id as number, isFileRecursive });
     }
   });
 </script>
@@ -51,14 +39,14 @@
 </svelte:head>
 
 {#if data.id !== "root"}
-  <TopBar title={$info?.name} />
+  <TopBar title={$info.data?.name} />
 {/if}
 <div class="min-h-full bg-gray-100 pb-[5.5em]">
-  {#if $info && isFileRecursive !== undefined}
+  {#if $info.status === "success"}
     <Category
       bind:isFileRecursive
-      info={$info}
-      onFileClick={({ id }) => goto(`/file/${id}?from=category`)}
+      info={$info.data}
+      onFileClick={({ id }) => goto(`/file/${id}`)}
       onFileRemoveClick={async ({ id }) => {
         await requestFileRemovalFromCategory(id, data.id as number);
         info = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME

src/routes/(main)/category/[[id]]/CategoryDeleteModal.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { ActionModal } from "$lib/components/molecules";
-  import { truncateString } from "$lib/utils";
+  import { truncateString } from "$lib/modules/util";
   import { useContext } from "./service.svelte";
 
   interface Props {

src/routes/(main)/category/[[id]]/service.svelte.ts

@@ -1,7 +1,8 @@
 import { getContext, setContext } from "svelte";
+import { callPostApi } from "$lib/hooks";
 import { encryptString } from "$lib/modules/crypto";
 import type { SelectedCategory } from "$lib/components/molecules";
-import { trpc } from "$trpc/client";
+import type { CategoryRenameRequest } from "$lib/server/schemas";
 
 export { requestCategoryCreation, requestFileRemovalFromCategory } from "$lib/services/category";
 
@@ -19,26 +20,15 @@ export const useContext = () => {
 export const requestCategoryRename = async (category: SelectedCategory, newName: string) => {
   const newNameEncrypted = await encryptString(newName, category.dataKey);
 
-  try {
-    await trpc().category.rename.mutate({
-      id: category.id,
-      dekVersion: category.dataKeyVersion,
-      name: newNameEncrypted.ciphertext,
-      nameIv: newNameEncrypted.iv,
-    });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi<CategoryRenameRequest>(`/api/category/${category.id}/rename`, {
+    dekVersion: category.dataKeyVersion.toISOString(),
+    name: newNameEncrypted.ciphertext,
+    nameIv: newNameEncrypted.iv,
+  });
+  return res.ok;
 };
 
 export const requestCategoryDeletion = async (category: SelectedCategory) => {
-  try {
-    await trpc().category.delete.mutate({ id: category.id });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi(`/api/category/${category.id}/delete`);
+  return res.ok;
 };

src/routes/(main)/directory/[[id]]/+page.svelte

@@ -1,11 +1,23 @@
 <script lang="ts">
   import { onMount } from "svelte";
-  import type { Writable } from "svelte/store";
   import { goto } from "$app/navigation";
-  import { page } from "$app/state";
   import { FloatingButton } from "$lib/components/atoms";
   import { TopBar } from "$lib/components/molecules";
-  import { getDirectoryInfo, type DirectoryInfo } from "$lib/modules/filesystem";
+  import {
+    storeFileCache,
+    deleteFileCache,
+    storeFileThumbnailCache,
+    deleteFileThumbnailCache,
+  } from "$lib/modules/file";
+  import {
+    getDirectoryInfo,
+    useDirectoryCreation,
+    useDirectoryRename,
+    useDirectoryDeletion,
+    useFileUpload,
+    useFileRename,
+    useFileDeletion,
+  } from "$lib/modules/filesystem2";
   import { masterKeyStore, hmacSecretStore } from "$lib/stores";
   import DirectoryCreateModal from "./DirectoryCreateModal.svelte";
   import DirectoryEntries from "./DirectoryEntries";
@@ -16,21 +28,23 @@
   import EntryMenuBottomSheet from "./EntryMenuBottomSheet.svelte";
   import EntryRenameModal from "./EntryRenameModal.svelte";
   import UploadStatusCard from "./UploadStatusCard.svelte";
-  import {
-    createContext,
-    requestHmacSecretDownload,
-    requestDirectoryCreation,
-    requestFileUpload,
-    requestEntryRename,
-    requestEntryDeletion,
-  } from "./service.svelte";
+  import { createContext, requestHmacSecretDownload } from "./service.svelte";
 
   import IconAdd from "~icons/material-symbols/add";
 
   let { data } = $props();
   let context = createContext();
 
-  let info: Writable<DirectoryInfo | null> | undefined = $state();
+  let info = $derived(getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!));
+  let requestDirectoryCreation = $derived(useDirectoryCreation(data.id, $masterKeyStore?.get(1)!));
+  let requestDirectoryRename = useDirectoryRename();
+  let requestDirectoryDeletion = $derived(useDirectoryDeletion(data.id));
+  let requestFileUpload = $derived(
+    useFileUpload(data.id, $masterKeyStore?.get(1)!, $hmacSecretStore?.get(1)!),
+  );
+  let requestFileRename = $derived(useFileRename());
+  let requestFileDeletion = $derived(useFileDeletion(data.id));
+
   let fileInput: HTMLInputElement | undefined = $state();
   let duplicatedFile: File | undefined = $state();
   let resolveForDuplicateFileModal: ((res: boolean) => void) | undefined = $state();
@@ -43,29 +57,29 @@
   let isEntryRenameModalOpen = $state(false);
   let isEntryDeleteModalOpen = $state(false);
 
-  let isFromFilePage = $derived(page.url.searchParams.get("from") === "file");
-  let showTopBar = $derived(data.id !== "root" || isFromFilePage);
-
   const uploadFile = () => {
     const files = fileInput?.files;
     if (!files || files.length === 0) return;
 
     for (const file of files) {
-      requestFileUpload(file, data.id, $hmacSecretStore?.get(1)!, $masterKeyStore?.get(1)!, () => {
-        return new Promise((resolve) => {
-          duplicatedFile = file;
-          resolveForDuplicateFileModal = resolve;
-          isDuplicateFileModalOpen = true;
-        });
-      })
-        .then((res) => {
-          if (!res) return;
-          // TODO: FIXME
-          info = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
+      $requestFileUpload
+        .mutateAsync({
+          file,
+          onDuplicate: () => {
+            return new Promise((resolve) => {
+              duplicatedFile = file;
+              resolveForDuplicateFileModal = resolve;
+              isDuplicateFileModalOpen = true;
+            });
+          },
         })
-        .catch((e: Error) => {
-          // TODO: FIXME
-          console.error(e);
+        .then((res) => {
+          if (res) {
+            storeFileCache(res.fileId, res.fileBuffer); // Intended
+            if (res.thumbnailBuffer) {
+              storeFileThumbnailCache(res.fileId, res.thumbnailBuffer); // Intended
+            }
+          }
         });
     }
 
@@ -77,10 +91,6 @@
       throw new Error("Failed to download hmac secrets");
     }
   });
-
-  $effect(() => {
-    info = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
-  });
 </script>
 
 <svelte:head>
@@ -90,30 +100,23 @@
 <input bind:this={fileInput} onchange={uploadFile} type="file" multiple class="hidden" />
 
 <div class="flex h-full flex-col">
-  {#if showTopBar}
-    <TopBar title={$info?.name} class="flex-shrink-0" />
+  {#if data.id !== "root"}
+    <TopBar title={$info.data?.name} class="flex-shrink-0" />
   {/if}
-  {#if $info}
-    <div class={["flex flex-grow flex-col px-4 pb-4", !showTopBar && "pt-4"]}>
+  {#if $info.status === "success"}
+    <div class={["flex flex-grow flex-col px-4 pb-4", data.id === "root" && "pt-4"]}>
       <div class="flex gap-x-2">
         <UploadStatusCard onclick={() => goto("/file/uploads")} />
         <DownloadStatusCard onclick={() => goto("/file/downloads")} />
       </div>
-      {#key $info}
+      {#key $info.data.id}
         <DirectoryEntries
-          info={$info}
+          info={$info.data}
           onEntryClick={({ type, id }) => goto(`/${type}/${id}`)}
           onEntryMenuClick={(entry) => {
             context.selectedEntry = entry;
             isEntryMenuBottomSheetOpen = true;
           }}
-          showParentEntry={isFromFilePage && $info.parentId !== undefined}
-          onParentClick={() =>
-            goto(
-              $info.parentId === "root"
-                ? "/directory?from=file"
-                : `/directory/${$info.parentId}?from=file`,
-            )}
         />
       {/key}
     </div>
@@ -141,11 +144,8 @@
 <DirectoryCreateModal
   bind:isOpen={isDirectoryCreateModalOpen}
   onCreateClick={async (name) => {
-    if (await requestDirectoryCreation(name, data.id, $masterKeyStore?.get(1)!)) {
-      info = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
-      return true;
-    }
-    return false;
+    $requestDirectoryCreation.mutate({ name });
+    return true; // TODO
   }}
 />
 <DuplicateFileModal
@@ -175,20 +175,45 @@
 <EntryRenameModal
   bind:isOpen={isEntryRenameModalOpen}
   onRenameClick={async (newName: string) => {
-    if (await requestEntryRename(context.selectedEntry!, newName)) {
-      info = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
-      return true;
+    if (context.selectedEntry!.type === "directory") {
+      $requestDirectoryRename.mutate({
+        id: context.selectedEntry!.id,
+        dataKey: context.selectedEntry!.dataKey,
+        dataKeyVersion: context.selectedEntry!.dataKeyVersion,
+        newName,
+      });
+      return true; // TODO
+    } else {
+      $requestFileRename.mutate({
+        id: context.selectedEntry!.id,
+        dataKey: context.selectedEntry!.dataKey,
+        dataKeyVersion: context.selectedEntry!.dataKeyVersion,
+        newName,
+      });
+      return true; // TODO
     }
-    return false;
   }}
 />
 <EntryDeleteModal
   bind:isOpen={isEntryDeleteModalOpen}
   onDeleteClick={async () => {
-    if (await requestEntryDeletion(context.selectedEntry!)) {
-      info = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
-      return true;
+    if (context.selectedEntry!.type === "directory") {
+      const res = await $requestDirectoryDeletion.mutateAsync({ id: context.selectedEntry!.id });
+      if (!res) return false;
+      await Promise.all(
+        res.deletedFiles.flatMap((fileId) => [
+          deleteFileCache(fileId),
+          deleteFileThumbnailCache(fileId),
+        ]),
+      );
+      return true; // TODO
+    } else {
+      await $requestFileDeletion.mutateAsync({ id: context.selectedEntry!.id });
+      await Promise.all([
+        deleteFileCache(context.selectedEntry!.id),
+        deleteFileThumbnailCache(context.selectedEntry!.id),
+      ]);
+      return true; // TODO
     }
-    return false;
   }}
 />

src/routes/(main)/directory/[[id]]/DirectoryEntries/DirectoryEntries.svelte

@@ -1,21 +1,19 @@
 <script lang="ts">
-  import { untrack } from "svelte";
-  import { get, type Writable } from "svelte/store";
-  import { ActionEntryButton, RowVirtualizer } from "$lib/components/atoms";
-  import { DirectoryEntryLabel } from "$lib/components/molecules";
+  import { derived } from "svelte/store";
   import {
     getDirectoryInfo,
     getFileInfo,
     type DirectoryInfo,
+    type SubDirectoryInfo,
     type FileInfo,
-  } from "$lib/modules/filesystem";
+  } from "$lib/modules/filesystem2";
+  import { SortBy, sortEntries } from "$lib/modules/util";
   import {
     fileUploadStatusStore,
     isFileUploading,
     masterKeyStore,
     type FileUploadStatus,
   } from "$lib/stores";
-  import { SortBy, sortEntries } from "$lib/utils";
   import File from "./File.svelte";
   import SubDirectory from "./SubDirectory.svelte";
   import UploadingFile from "./UploadingFile.svelte";
@@ -25,125 +23,97 @@
     info: DirectoryInfo;
     onEntryClick: (entry: SelectedEntry) => void;
     onEntryMenuClick: (entry: SelectedEntry) => void;
-    onParentClick?: () => void;
-    showParentEntry?: boolean;
     sortBy?: SortBy;
   }
 
-  let {
-    info,
-    onEntryClick,
-    onEntryMenuClick,
-    onParentClick,
-    showParentEntry = false,
-    sortBy = SortBy.NAME_ASC,
-  }: Props = $props();
+  let { info, onEntryClick, onEntryMenuClick, sortBy = SortBy.NAME_ASC }: Props = $props();
 
   interface DirectoryEntry {
     name?: string;
-    info: Writable<DirectoryInfo | null>;
+    info: SubDirectoryInfo;
   }
 
   type FileEntry =
     | {
         type: "file";
         name?: string;
-        info: Writable<FileInfo | null>;
+        info: FileInfo;
       }
     | {
         type: "uploading-file";
         name: string;
-        info: Writable<FileUploadStatus>;
+        info: FileUploadStatus;
       };
 
-  let subDirectories: DirectoryEntry[] = $state([]);
-  let files: FileEntry[] = $state([]);
-
-  $effect(() => {
-    // TODO: Fix duplicated requests
-
-    subDirectories = info.subDirectoryIds.map((id) => {
-      const info = getDirectoryInfo(id, $masterKeyStore?.get(1)?.key!);
-      return { name: get(info)?.name, info };
-    });
-    files = info.fileIds
-      .map((id): FileEntry => {
-        const info = getFileInfo(id, $masterKeyStore?.get(1)?.key!);
-        return {
-          type: "file",
-          name: get(info)?.name,
-          info,
-        };
-      })
-      .concat(
-        $fileUploadStatusStore
-          .filter((statusStore) => {
-            const { parentId, status } = get(statusStore);
-            return parentId === info.id && isFileUploading(status);
-          })
-          .map((status) => ({
-            type: "uploading-file",
-            name: get(status).name,
-            info: status,
-          })),
-      );
-
-    const sort = () => {
-      sortEntries(subDirectories, sortBy);
-      sortEntries(files, sortBy);
-    };
-    return untrack(() => {
-      sort();
-
-      const unsubscribes = subDirectories
-        .map((subDirectory) =>
-          subDirectory.info.subscribe((value) => {
-            if (subDirectory.name === value?.name) return;
-            subDirectory.name = value?.name;
-            sort();
-          }),
-        )
-        .concat(
-          files.map((file) =>
-            file.info.subscribe((value) => {
-              if (file.name === value?.name) return;
-              file.name = value?.name;
-              sort();
-            }),
+  let subDirectories = $derived(
+    derived(
+      info.subDirectoryIds.map((id) => getDirectoryInfo(id, $masterKeyStore?.get(1)?.key!)),
+      (infos) => {
+        const subDirectories = infos
+          .filter(($info) => $info.status === "success")
+          .map(
+            ($info) =>
+              ({
+                name: $info.data.name,
+                info: $info.data as SubDirectoryInfo,
+              }) satisfies DirectoryEntry,
+          );
+        sortEntries(subDirectories, sortBy);
+        return subDirectories;
+      },
+    ),
+  );
+  let files = $derived(
+    derived(
+      info.fileIds.map((id) => getFileInfo(id, $masterKeyStore?.get(1)?.key!)),
+      (infos) =>
+        infos
+          .filter(($info) => $info.status === "success")
+          .map(
+            ($info) =>
+              ({
+                type: "file",
+                name: $info.data.name,
+                info: $info.data,
+              }) satisfies FileEntry,
           ),
-        );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
+    ),
+  );
+  let uploadingFiles = $derived(
+    derived($fileUploadStatusStore, (statuses) =>
+      statuses
+        .filter(({ parentId, status }) => parentId === info.id && isFileUploading(status))
+        .map(
+          ($status) =>
+            ({
+              type: "uploading-file",
+              name: $status.name,
+              info: $status,
+            }) satisfies FileEntry,
+        ),
+    ),
+  );
+  let everyFiles = $derived(
+    derived([files, uploadingFiles], ([$files, $uploadingFiles]) => {
+      const allFiles = [...$files, ...$uploadingFiles];
+      sortEntries(allFiles, sortBy);
+      return allFiles;
+    }),
+  );
 </script>
 
-{#if subDirectories.length + files.length > 0 || showParentEntry}
+{#if $subDirectories.length + $everyFiles.length > 0}
   <div class="space-y-1 pb-[4.5rem]">
-    {#if showParentEntry}
-      <ActionEntryButton class="h-14" onclick={onParentClick}>
-        <DirectoryEntryLabel type="parent-directory" name=".." />
-      </ActionEntryButton>
-    {/if}
-    {#each subDirectories as { info }}
+    {#each $subDirectories as { info }}
       <SubDirectory {info} onclick={onEntryClick} onOpenMenuClick={onEntryMenuClick} />
     {/each}
-    {#if files.length > 0}
-      <RowVirtualizer
-        count={files.length}
-        itemHeight={(index) => 56 + (index + 1 < files.length ? 4 : 0)}
-      >
-        {#snippet item(index)}
-          {@const file = files[index]!}
-          <div class={index + 1 < files.length ? "pb-1" : ""}>
-            {#if file.type === "file"}
-              <File info={file.info} onclick={onEntryClick} onOpenMenuClick={onEntryMenuClick} />
-            {:else}
-              <UploadingFile status={file.info} />
-            {/if}
-          </div>
-        {/snippet}
-      </RowVirtualizer>
-    {/if}
+    {#each $everyFiles as file}
+      {#if file.type === "file"}
+        <File info={file.info} onclick={onEntryClick} onOpenMenuClick={onEntryMenuClick} />
+      {:else}
+        <UploadingFile status={file.info} />
+      {/if}
+    {/each}
   </div>
 {:else}
   <div class="flex flex-grow items-center justify-center">

src/routes/(main)/directory/[[id]]/DirectoryEntries/File.svelte

@@ -1,16 +1,15 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
   import { ActionEntryButton } from "$lib/components/atoms";
   import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import type { FileInfo } from "$lib/modules/filesystem";
-  import { formatDateTime } from "$lib/utils";
+  import type { FileInfo } from "$lib/modules/filesystem2";
+  import { formatDateTime } from "$lib/modules/util";
   import { requestFileThumbnailDownload } from "./service";
   import type { SelectedEntry } from "../service.svelte";
 
   import IconMoreVert from "~icons/material-symbols/more-vert";
 
   interface Props {
-    info: Writable<FileInfo | null>;
+    info: FileInfo;
     onclick: (selectedEntry: SelectedEntry) => void;
     onOpenMenuClick: (selectedEntry: SelectedEntry) => void;
   }
@@ -20,22 +19,22 @@
   let thumbnail: string | undefined = $state();
 
   const openFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info!;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onclick({ type: "file", id, dataKey, dataKeyVersion, name });
   };
 
   const openMenu = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info!;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onOpenMenuClick({ type: "file", id, dataKey, dataKeyVersion, name });
   };
 
   $effect(() => {
-    if ($info) {
-      requestFileThumbnailDownload($info.id, $info.dataKey)
+    if (info.dataKey) {
+      requestFileThumbnailDownload(info.id, info.dataKey)
         .then((thumbnailUrl) => {
           thumbnail = thumbnailUrl ?? undefined;
         })
@@ -49,18 +48,16 @@
   });
 </script>
 
-{#if $info}
-  <ActionEntryButton
-    class="h-14"
-    onclick={openFile}
-    actionButtonIcon={IconMoreVert}
-    onActionButtonClick={openMenu}
-  >
-    <DirectoryEntryLabel
-      type="file"
-      {thumbnail}
-      name={$info.name}
-      subtext={formatDateTime($info.createdAt ?? $info.lastModifiedAt)}
-    />
-  </ActionEntryButton>
-{/if}
+<ActionEntryButton
+  class="h-14"
+  onclick={openFile}
+  actionButtonIcon={IconMoreVert}
+  onActionButtonClick={openMenu}
+>
+  <DirectoryEntryLabel
+    type="file"
+    {thumbnail}
+    name={info.name}
+    subtext={formatDateTime(info.createdAt ?? info.lastModifiedAt)}
+  />
+</ActionEntryButton>

src/routes/(main)/directory/[[id]]/DirectoryEntries/SubDirectory.svelte

@@ -1,16 +1,13 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
   import { ActionEntryButton } from "$lib/components/atoms";
   import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import type { DirectoryInfo } from "$lib/modules/filesystem";
+  import type { SubDirectoryInfo } from "$lib/modules/filesystem2";
   import type { SelectedEntry } from "../service.svelte";
 
   import IconMoreVert from "~icons/material-symbols/more-vert";
 
-  type SubDirectoryInfo = DirectoryInfo & { id: number };
-
   interface Props {
-    info: Writable<DirectoryInfo | null>;
+    info: SubDirectoryInfo;
     onclick: (selectedEntry: SelectedEntry) => void;
     onOpenMenuClick: (selectedEntry: SelectedEntry) => void;
   }
@@ -18,27 +15,25 @@
   let { info, onclick, onOpenMenuClick }: Props = $props();
 
   const openDirectory = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as SubDirectoryInfo;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onclick({ type: "directory", id, dataKey, dataKeyVersion, name });
   };
 
   const openMenu = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as SubDirectoryInfo;
+    const { id, dataKey, dataKeyVersion, name } = info;
     if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
 
     onOpenMenuClick({ type: "directory", id, dataKey, dataKeyVersion, name });
   };
 </script>
 
-{#if $info}
-  <ActionEntryButton
-    class="h-14"
-    onclick={openDirectory}
-    actionButtonIcon={IconMoreVert}
-    onActionButtonClick={openMenu}
-  >
-    <DirectoryEntryLabel type="directory" name={$info.name!} />
-  </ActionEntryButton>
-{/if}
+<ActionEntryButton
+  class="h-14"
+  onclick={openDirectory}
+  actionButtonIcon={IconMoreVert}
+  onActionButtonClick={openMenu}
+>
+  <DirectoryEntryLabel type="directory" name={info.name} />
+</ActionEntryButton>

src/routes/(main)/directory/[[id]]/DirectoryEntries/UploadingFile.svelte

@@ -1,36 +1,35 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
+  import { formatNetworkSpeed } from "$lib/modules/util";
   import { isFileUploading, type FileUploadStatus } from "$lib/stores";
-  import { formatNetworkSpeed } from "$lib/utils";
 
   import IconDraft from "~icons/material-symbols/draft";
 
   interface Props {
-    status: Writable<FileUploadStatus>;
+    status: FileUploadStatus;
   }
 
   let { status }: Props = $props();
 </script>
 
-{#if isFileUploading($status.status)}
+{#if isFileUploading(status.status)}
   <div class="flex h-14 gap-x-4 p-2">
     <div class="flex h-10 w-10 flex-shrink-0 items-center justify-center text-xl">
       <IconDraft class="text-gray-600" />
     </div>
     <div class="flex flex-grow flex-col overflow-hidden text-gray-800">
-      <p title={$status.name} class="truncate font-medium">
-        {$status.name}
+      <p title={status.name} class="truncate font-medium">
+        {status.name}
       </p>
       <p class="text-xs">
-        {#if $status.status === "encryption-pending"}
+        {#if status.status === "encryption-pending"}
           준비 중
-        {:else if $status.status === "encrypting"}
+        {:else if status.status === "encrypting"}
           암호화하는 중
-        {:else if $status.status === "upload-pending"}
+        {:else if status.status === "upload-pending"}
           업로드를 기다리는 중
-        {:else if $status.status === "uploading"}
-          전송됨 {Math.floor(($status.progress ?? 0) * 100)}% ·
-          {formatNetworkSpeed(($status.rate ?? 0) * 8)}
+        {:else if status.status === "uploading"}
+          전송됨 {Math.floor((status.progress ?? 0) * 100)}% ·
+          {formatNetworkSpeed((status.rate ?? 0) * 8)}
         {/if}
       </p>
     </div>

src/routes/(main)/directory/[[id]]/DuplicateFileModal.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { ActionModal } from "$lib/components/molecules";
-  import { truncateString } from "$lib/utils";
+  import { truncateString } from "$lib/modules/util";
 
   interface Props {
     file: File | undefined;

src/routes/(main)/directory/[[id]]/EntryDeleteModal.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { ActionModal } from "$lib/components/molecules";
-  import { truncateString } from "$lib/utils";
+  import { truncateString } from "$lib/modules/util";
   import { useContext } from "./service.svelte";
 
   interface Props {

src/routes/(main)/directory/[[id]]/service.svelte.ts

@@ -1,4 +1,5 @@
 import { getContext, setContext } from "svelte";
+import { callGetApi, callPostApi } from "$lib/hooks";
 import { storeHmacSecrets } from "$lib/indexedDB";
 import { generateDataKey, wrapDataKey, unwrapHmacSecret, encryptString } from "$lib/modules/crypto";
 import {
@@ -8,8 +9,14 @@ import {
   deleteFileThumbnailCache,
   uploadFile,
 } from "$lib/modules/file";
+import type {
+  DirectoryRenameRequest,
+  DirectoryCreateRequest,
+  FileRenameRequest,
+  HmacSecretListResponse,
+  DirectoryDeleteResponse,
+} from "$lib/server/schemas";
 import { hmacSecretStore, type MasterKey, type HmacSecret } from "$lib/stores";
-import { trpc } from "$trpc/client";
 
 export interface SelectedEntry {
   type: "directory" | "file";
@@ -33,14 +40,10 @@ export const useContext = () => {
 export const requestHmacSecretDownload = async (masterKey: CryptoKey) => {
   // TODO: MEK rotation
 
-  let hmacSecretsWrapped;
-  try {
-    hmacSecretsWrapped = await trpc().hsk.list.query();
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callGetApi("/api/hsk/list");
+  if (!res.ok) return false;
 
+  const { hsks: hmacSecretsWrapped }: HmacSecretListResponse = await res.json();
   const hmacSecrets = await Promise.all(
     hmacSecretsWrapped.map(async ({ version, state, hsk: hmacSecretWrapped }) => {
       const { hmacSecret } = await unwrapHmacSecret(hmacSecretWrapped, masterKey);
@@ -62,20 +65,15 @@ export const requestDirectoryCreation = async (
   const { dataKey, dataKeyVersion } = await generateDataKey();
   const nameEncrypted = await encryptString(name, dataKey);
 
-  try {
-    await trpc().directory.create.mutate({
-      parent: parentId,
-      mekVersion: masterKey.version,
-      dek: await wrapDataKey(dataKey, masterKey.key),
-      dekVersion: dataKeyVersion,
-      name: nameEncrypted.ciphertext,
-      nameIv: nameEncrypted.iv,
-    });
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
-  }
+  const res = await callPostApi<DirectoryCreateRequest>("/api/directory/create", {
+    parent: parentId,
+    mekVersion: masterKey.version,
+    dek: await wrapDataKey(dataKey, masterKey.key),
+    dekVersion: dataKeyVersion.toISOString(),
+    name: nameEncrypted.ciphertext,
+    nameIv: nameEncrypted.iv,
+  });
+  return res.ok;
 };
 
 export const requestFileUpload = async (
@@ -99,46 +97,35 @@ export const requestFileUpload = async (
 export const requestEntryRename = async (entry: SelectedEntry, newName: string) => {
   const newNameEncrypted = await encryptString(newName, entry.dataKey);
 
-  try {
-    if (entry.type === "directory") {
-      await trpc().directory.rename.mutate({
-        id: entry.id,
-        dekVersion: entry.dataKeyVersion,
-        name: newNameEncrypted.ciphertext,
-        nameIv: newNameEncrypted.iv,
-      });
-    } else {
-      await trpc().file.rename.mutate({
-        id: entry.id,
-        dekVersion: entry.dataKeyVersion,
-        name: newNameEncrypted.ciphertext,
-        nameIv: newNameEncrypted.iv,
-      });
-    }
-    return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
+  let res;
+  if (entry.type === "directory") {
+    res = await callPostApi<DirectoryRenameRequest>(`/api/directory/${entry.id}/rename`, {
+      dekVersion: entry.dataKeyVersion.toISOString(),
+      name: newNameEncrypted.ciphertext,
+      nameIv: newNameEncrypted.iv,
+    });
+  } else {
+    res = await callPostApi<FileRenameRequest>(`/api/file/${entry.id}/rename`, {
+      dekVersion: entry.dataKeyVersion.toISOString(),
+      name: newNameEncrypted.ciphertext,
+      nameIv: newNameEncrypted.iv,
+    });
   }
+  return res.ok;
 };
 
 export const requestEntryDeletion = async (entry: SelectedEntry) => {
-  try {
-    if (entry.type === "directory") {
-      const { deletedFiles } = await trpc().directory.delete.mutate({ id: entry.id });
-      await Promise.all(
-        deletedFiles.flatMap((fileId) => [
-          deleteFileCache(fileId),
-          deleteFileThumbnailCache(fileId),
-        ]),
-      );
-    } else {
-      await trpc().file.delete.mutate({ id: entry.id });
-      await Promise.all([deleteFileCache(entry.id), deleteFileThumbnailCache(entry.id)]);
-    }
+  const res = await callPostApi(`/api/${entry.type}/${entry.id}/delete`);
+  if (!res.ok) return false;
+
+  if (entry.type === "directory") {
+    const { deletedFiles }: DirectoryDeleteResponse = await res.json();
+    await Promise.all(
+      deletedFiles.flatMap((fileId) => [deleteFileCache(fileId), deleteFileThumbnailCache(fileId)]),
+    );
+    return true;
+  } else {
+    await Promise.all([deleteFileCache(entry.id), deleteFileThumbnailCache(entry.id)]);
     return true;
-  } catch {
-    // TODO: Error Handling
-    return false;
   }
 };

src/routes/(main)/home/+page.svelte

@@ -1,36 +1,3 @@
-<script lang="ts">
-  import type { Writable } from "svelte/store";
-  import { goto } from "$app/navigation";
-  import { EntryButton, FileThumbnailButton } from "$lib/components/atoms";
-  import { getFileInfo, type FileInfo } from "$lib/modules/filesystem";
-  import { masterKeyStore } from "$lib/stores";
-  import { requestFreshMediaFilesRetrieval } from "./service";
-
-  let mediaFiles: Writable<FileInfo | null>[] = $state([]);
-
-  $effect(() => {
-    requestFreshMediaFilesRetrieval().then((files) => {
-      mediaFiles = files.map(({ id }) => getFileInfo(id, $masterKeyStore?.get(1)?.key!));
-    });
-  });
-</script>
-
-<svelte:head>
-  <title>홈</title>
-</svelte:head>
-
-<div class="min-h-full space-y-4 bg-gray-100 px-4 pb-[5.5em] pt-4">
-  <p class="px-2 text-2xl font-bold text-gray-800">ArkVault</p>
-  <div class="rounded-xl bg-white p-2">
-    <EntryButton onclick={() => goto("/gallery")} class="w-full">
-      <p class="text-left font-semibold">사진 및 동영상</p>
-    </EntryButton>
-    {#if mediaFiles.length > 0}
-      <div class="grid grid-cols-4 gap-2 p-2">
-        {#each mediaFiles as file}
-          <FileThumbnailButton info={file} onclick={({ id }) => goto(`/file/${id}`)} />
-        {/each}
-      </div>
-    {/if}
-  </div>
+<div class="flex h-full items-center justify-center p-4">
+  <p class="text-gray-500">아직 개발 중이에요.</p>
 </div>

src/routes/(main)/home/service.ts

@@ -1,14 +0,0 @@
-import { getAllFileInfos } from "$lib/indexedDB";
-
-export const requestFreshMediaFilesRetrieval = async (limit = 8) => {
-  const files = await getAllFileInfos();
-  files.sort(
-    (a, b) =>
-      (b.createdAt ?? b.lastModifiedAt).getTime() - (a.createdAt ?? a.lastModifiedAt).getTime(),
-  );
-  return files
-    .filter(
-      ({ contentType }) => contentType.startsWith("image/") || contentType.startsWith("video/"),
-    )
-    .slice(0, limit);
-};

src/routes/(main)/menu/+page.server.ts

@@ -1,7 +0,0 @@
-import { createCaller } from "$trpc/router.server";
-import type { PageServerLoad } from "./$types";
-
-export const load: PageServerLoad = async (event) => {
-  const { nickname } = await createCaller(event).user.get();
-  return { nickname };
-};

src/routes/(main)/menu/+page.ts

@@ -0,0 +1,14 @@
+import { error } from "@sveltejs/kit";
+import { callGetApi } from "$lib/hooks";
+import type { UserInfoResponse } from "$lib/server/schemas";
+import type { PageLoad } from "./$types";
+
+export const load: PageLoad = async ({ fetch }) => {
+  const res = await callGetApi("/api/user", { fetch });
+  if (!res.ok) {
+    error(500, "Internal server error");
+  }
+
+  const { nickname }: UserInfoResponse = await res.json();
+  return { nickname };
+};

src/routes/+layout.svelte

@@ -1,6 +1,8 @@
 <script lang="ts">
+  import { QueryClient, QueryClientProvider } from "@tanstack/svelte-query";
   import { onMount } from "svelte";
   import { get } from "svelte/store";
+  import { browser } from "$app/environment";
   import { goto as svelteGoto } from "$app/navigation";
   import {
     fileUploadStatusStore,
@@ -10,10 +12,19 @@
     clientKeyStore,
     masterKeyStore,
   } from "$lib/stores";
+
   import "../app.css";
 
   let { children } = $props();
 
+  const queryClient = new QueryClient({
+    defaultOptions: {
+      queries: {
+        enabled: browser,
+      },
+    },
+  });
+
   const protectFileUploadAndDownload = (e: BeforeUnloadEvent) => {
     if (
       $fileUploadStatusStore.some((status) => isFileUploading(get(status).status)) ||
@@ -24,6 +35,8 @@
   };
 
   onMount(async () => {
+    window.__TANSTACK_QUERY_CLIENT__ = queryClient;
+
     const goto = async (url: string) => {
       const whitelist = ["/auth/login", "/key", "/client/pending"];
       if (!whitelist.some((path) => location.pathname.startsWith(path))) {
@@ -43,4 +56,6 @@
 
 <svelte:window onbeforeunload={protectFileUploadAndDownload} />
 
-{@render children()}
+<QueryClientProvider client={queryClient}>
+  {@render children()}
+</QueryClientProvider>

src/routes/api/auth/changePassword/+server.ts

@@ -0,0 +1,16 @@
+import { error, text } from "@sveltejs/kit";
+import { authorize } from "$lib/server/modules/auth";
+import { passwordChangeRequest } from "$lib/server/schemas";
+import { changePassword } from "$lib/server/services/auth";
+import type { RequestHandler } from "./$types";
+
+export const POST: RequestHandler = async ({ locals, request }) => {
+  const { sessionId, userId } = await authorize(locals, "any");
+
+  const zodRes = passwordChangeRequest.safeParse(await request.json());
+  if (!zodRes.success) error(400, "Invalid request body");
+  const { oldPassword, newPassword } = zodRes.data;
+
+  await changePassword(userId, sessionId, oldPassword, newPassword);
+  return text("Password changed", { headers: { "Content-Type": "text/plain" } });
+};