카테고리 페이지에서의 네트워크 호출 최적화

src/lib/components/atoms/RowVirtualizer.svelte

@@ -0,0 +1,58 @@
+<script lang="ts">
+  import { createWindowVirtualizer } from "@tanstack/svelte-virtual";
+  import 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();
+
+  let element: HTMLElement | undefined = $state();
+  let scrollMargin = $state(0);
+
+  let virtualizer = $derived(
+    createWindowVirtualizer({
+      count,
+      estimateSize: itemHeight,
+      scrollMargin,
+    }),
+  );
+
+  const measureItem = (node: HTMLElement) => {
+    $effect(() => $virtualizer.measureElement(node));
+  };
+
+  $effect(() => {
+    if (!element) return;
+
+    const observer = new ResizeObserver(() => {
+      scrollMargin = element!.getBoundingClientRect().top + window.scrollY;
+    });
+    observer.observe(element.parentElement!);
+    return () => observer.disconnect();
+  });
+</script>
+
+<div bind:this={element} class={["relative", className]}>
+  <div style:height="{$virtualizer.getTotalSize()}px">
+    {#each $virtualizer.getVirtualItems() as virtualItem (virtualItem.key)}
+      <div
+        class="absolute left-0 top-0 w-full"
+        style:transform="translateY({virtualItem.start - scrollMargin}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/index.ts

@@ -3,3 +3,4 @@ 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

@@ -1,59 +1,29 @@
 <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 "$lib/modules/filesystem";
+  import type { SubCategoryInfo } from "$lib/modules/filesystem2.svelte";
   import { SortBy, sortEntries } from "$lib/utils";
   import Category from "./Category.svelte";
   import type { SelectedCategory } from "./service";
 
   interface Props {
-    categories: Writable<CategoryInfo | null>[];
+    categories: SubCategoryInfo[];
     categoryMenuIcon?: Component<SvelteHTMLElements["svg"]>;
     onCategoryClick: (category: SelectedCategory) => void;
     onCategoryMenuClick?: (category: SelectedCategory) => void;
     sortBy?: SortBy;
   }
 
-  let {
-    categories,
-    categoryMenuIcon,
-    onCategoryClick,
-    onCategoryMenuClick,
-    sortBy = SortBy.NAME_ASC,
-  }: Props = $props();
+  let { categories, categoryMenuIcon, onCategoryClick, onCategoryMenuClick }: 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 categoriesWithName = $derived(sortEntries(structuredClone($state.snapshot(categories))));
 </script>
 
 {#if categoriesWithName.length > 0}
   <div class="space-y-1">
-    {#each categoriesWithName as { info }}
+    {#each categoriesWithName as category}
       <Category
-        {info}
+        info={category}
         menuIcon={categoryMenuIcon}
         onclick={onCategoryClick}
         onMenuClick={onCategoryMenuClick}

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

@@ -1,43 +1,26 @@
 <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.svelte";
   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;
   }
 
   let { info, menuIcon, onclick, onMenuClick }: Props = $props();
-
-  const openCategory = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as CategoryInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onclick({ id, dataKey, dataKeyVersion, name });
-  };
-
-  const openMenu = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as CategoryInfo;
-    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={() => onclick(info)}
+  actionButtonIcon={menuIcon}
+  onActionButtonClick={() => onMenuClick?.(info)}
+>
+  <CategoryLabel name={info.name} />
+</ActionEntryButton>

src/lib/components/molecules/Categories/service.ts

@@ -1,6 +1,5 @@
 export interface SelectedCategory {
   id: number;
-  dataKey: CryptoKey;
-  dataKeyVersion: Date;
+  dataKey?: { key: CryptoKey; version: Date };
   name: string;
 }

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.svelte";
 
   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]}>
@@ -53,14 +43,12 @@
   {#if subCategoryCreatePosition === "top"}
     {@render subCategoryCreate()}
   {/if}
-  {#key info}
-    <Categories
-      categories={subCategories}
-      categoryMenuIcon={subCategoryMenuIcon}
-      onCategoryClick={onSubCategoryClick}
-      onCategoryMenuClick={onSubCategoryMenuClick}
-    />
-  {/key}
+  <Categories
+    categories={info.subCategories}
+    categoryMenuIcon={subCategoryMenuIcon}
+    onCategoryClick={onSubCategoryClick}
+    onCategoryMenuClick={onSubCategoryMenuClick}
+  />
   {#if subCategoryCreatePosition === "bottom"}
     {@render subCategoryCreate()}
   {/if}

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

@@ -1,11 +1,8 @@
 <script lang="ts">
-  import { untrack } from "svelte";
-  import { get, type Writable } from "svelte/store";
-  import { CheckBox } from "$lib/components/atoms";
+  import { CheckBox, RowVirtualizer } from "$lib/components/atoms";
   import { SubCategories, type SelectedCategory } from "$lib/components/molecules";
-  import { getFileInfo, type FileInfo, type CategoryInfo } from "$lib/modules/filesystem";
-  import { masterKeyStore } from "$lib/stores";
-  import { SortBy, sortEntries } from "$lib/utils";
+  import type { CategoryInfo } from "$lib/modules/filesystem2.svelte";
+  import { sortEntries } from "$lib/utils";
   import File from "./File.svelte";
   import type { SelectedFile } from "./service";
 
@@ -13,13 +10,12 @@
 
   interface Props {
     info: CategoryInfo;
+    isFileRecursive: boolean | undefined;
     onFileClick: (file: SelectedFile) => void;
     onFileRemoveClick: (file: SelectedFile) => void;
     onSubCategoryClick: (subCategory: SelectedCategory) => void;
     onSubCategoryCreateClick: () => void;
     onSubCategoryMenuClick: (subCategory: SelectedCategory) => void;
-    sortBy?: SortBy;
-    isFileRecursive: boolean;
   }
 
   let {
@@ -29,43 +25,16 @@
     onSubCategoryClick,
     onSubCategoryCreateClick,
     onSubCategoryMenuClick,
-    sortBy = SortBy.NAME_ASC,
     isFileRecursive = $bindable(),
   }: Props = $props();
 
-  let files: { name?: string; info: Writable<FileInfo | null>; isRecursive: boolean }[] = $state(
-    [],
-  );
-
-  $effect(() => {
-    files =
+  let files = $derived(
+    sortEntries(
       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());
-    });
-  });
+        ?.map((file) => ({ name: file.name, details: file }))
+        .filter(({ details }) => isFileRecursive || !details.isRecursive) ?? [],
+    ),
+  );
 </script>
 
 <div class="space-y-4">
@@ -89,19 +58,24 @@
           <p class="font-medium">하위 카테고리의 파일</p>
         </CheckBox>
       </div>
-      <div class="space-y-1">
-        {#key info}
-          {#each files as { info, isRecursive }}
+      <RowVirtualizer
+        count={files.length}
+        itemHeight={(index) => 48 + (index + 1 < files.length ? 4 : 0)}
+      >
+        {#snippet item(index)}
+          {@const { details } = files[index]!}
+          <div class={[index + 1 < files.length && "pb-1"]}>
             <File
-              {info}
+              info={details}
               onclick={onFileClick}
-              onRemoveClick={!isRecursive ? onFileRemoveClick : undefined}
+              onRemoveClick={!details.isRecursive ? onFileRemoveClick : undefined}
             />
-          {:else}
-            <p class="text-gray-500 text-center">이 카테고리에 추가된 파일이 없어요.</p>
-          {/each}
-        {/key}
-      </div>
+          </div>
+        {/snippet}
+        {#snippet placeholder()}
+          <p class="text-center text-gray-500">이 카테고리에 추가된 파일이 없어요.</p>
+        {/snippet}
+      </RowVirtualizer>
     </div>
   {/if}
 </div>

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

@@ -1,59 +1,38 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
+  import { browser } from "$app/environment";
   import { ActionEntryButton } from "$lib/components/atoms";
   import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import type { FileInfo } from "$lib/modules/filesystem";
-  import { requestFileThumbnailDownload, type SelectedFile } from "./service";
+  import type { CategoryFileInfo } from "$lib/modules/filesystem2.svelte";
+  import { requestFileThumbnailDownload } from "$lib/services/file";
+  import type { SelectedFile } from "./service";
 
   import IconClose from "~icons/material-symbols/close";
 
   interface Props {
-    info: Writable<FileInfo | null>;
-    onclick: (selectedFile: SelectedFile) => void;
-    onRemoveClick?: (selectedFile: SelectedFile) => void;
+    info: CategoryFileInfo;
+    onclick: (file: SelectedFile) => void;
+    onRemoveClick?: (file: SelectedFile) => void;
   }
 
   let { info, onclick, onRemoveClick }: Props = $props();
 
-  let thumbnail: string | undefined = $state();
-
-  const openFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as FileInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onclick({ id, dataKey, dataKeyVersion, name });
-  };
-
-  const removeFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as FileInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onRemoveClick!({ id, dataKey, dataKeyVersion, name });
-  };
-
-  $effect(() => {
-    if ($info) {
-      requestFileThumbnailDownload($info.id, $info.dataKey)
-        .then((thumbnailUrl) => {
-          thumbnail = thumbnailUrl ?? undefined;
-        })
-        .catch(() => {
-          // TODO: Error Handling
-          thumbnail = undefined;
-        });
-    } else {
-      thumbnail = undefined;
-    }
-  });
+  let showThumbnail = $derived(
+    browser && (info.contentType.startsWith("image/") || info.contentType.startsWith("video/")),
+  );
+  let thumbnailPromise = $derived(
+    showThumbnail ? requestFileThumbnailDownload(info.id, info.dataKey?.key) : null,
+  );
 </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={() => onclick(info)}
+  actionButtonIcon={onRemoveClick && IconClose}
+  onActionButtonClick={() => onRemoveClick?.(info)}
+>
+  {#await thumbnailPromise}
+    <DirectoryEntryLabel type="file" name={info.name} />
+  {:then thumbnail}
+    <DirectoryEntryLabel type="file" thumbnail={thumbnail ?? undefined} name={info.name} />
+  {/await}
+</ActionEntryButton>

src/lib/components/organisms/Category/service.ts

@@ -1,8 +1,4 @@
-export { requestFileThumbnailDownload } from "$lib/services/file";
-
 export interface SelectedFile {
   id: number;
-  dataKey: CryptoKey;
-  dataKeyVersion: Date;
   name: string;
 }

src/lib/components/organisms/Gallery.svelte

@@ -1,8 +1,7 @@
 <script lang="ts">
-  import { createWindowVirtualizer } from "@tanstack/svelte-virtual";
   import { untrack } from "svelte";
   import { get, type Writable } from "svelte/store";
-  import { FileThumbnailButton } from "$lib/components/atoms";
+  import { FileThumbnailButton, RowVirtualizer } from "$lib/components/atoms";
   import type { FileInfo } from "$lib/modules/filesystem";
   import { formatDate, formatDateSortable, SortBy, sortEntries } from "$lib/utils";
 
@@ -17,25 +16,11 @@
     | { date?: undefined; contentType?: undefined; info: Writable<FileInfo | null> }
     | { date: Date; contentType: string; info: Writable<FileInfo | null> };
   type Row =
-    | { type: "header"; key: string; label: string }
-    | { type: "items"; key: string; items: FileEntry[] };
+    | { type: "header"; label: string }
+    | { type: "items"; items: FileEntry[]; isLast: boolean };
 
   let filesWithDate: FileEntry[] = $state([]);
   let rows: Row[] = $state([]);
-  let listElement: HTMLDivElement | undefined = $state();
-
-  const virtualizer = createWindowVirtualizer({
-    count: 0,
-    getItemKey: (index) => rows[index]!.key,
-    estimateSize: () => 1000, // TODO
-  });
-
-  const measureRow = (node: HTMLElement) => {
-    $virtualizer.measureElement(node);
-    return {
-      update: () => $virtualizer.measureElement(node),
-    };
-  };
 
   $effect(() => {
     filesWithDate = files.map((file) => {
@@ -76,18 +61,19 @@
 
         newRows.push({
           type: "header",
-          key: `header-${date}`,
           label: formatDate(entries[0]!.date!),
         });
-        newRows.push({
-          type: "items",
-          key: `items-${date}`,
-          items: entries,
-        });
+
+        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;
-      $virtualizer.setOptions({ count: rows.length });
     };
     return untrack(() => {
       buildRows();
@@ -110,29 +96,29 @@
   });
 </script>
 
-<div bind:this={listElement} class="relative flex flex-grow flex-col">
-  <div style="height: {$virtualizer.getTotalSize()}px;">
-    {#each $virtualizer.getVirtualItems() as virtualRow (virtualRow.key)}
-      {@const row = rows[virtualRow.index]!}
-      <div
-        use:measureRow
-        data-index={virtualRow.index}
-        class="absolute left-0 top-0 w-full"
-        style="transform: translateY({virtualRow.start}px);"
-      >
-        {#if row.type === "header"}
-          <p class="pb-2 font-medium">{row.label}</p>
-        {:else}
-          <div class="grid grid-cols-4 gap-1 pb-4">
-            {#each row.items as { info }}
-              <FileThumbnailButton {info} onclick={onFileClick} />
-            {/each}
-          </div>
-        {/if}
+<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>
-    {/each}
-  </div>
-  {#if $virtualizer.getVirtualItems().length === 0}
+    {/if}
+  {/snippet}
+  {#snippet placeholder()}
     <div class="flex h-full flex-grow items-center justify-center">
       <p class="text-gray-500">
         {#if files.length === 0}
@@ -144,5 +130,5 @@
         {/if}
       </p>
     </div>
-  {/if}
-</div>
+  {/snippet}
+</RowVirtualizer>

src/lib/indexedDB/filesystem.ts

@@ -1,7 +1,5 @@
 import { Dexie, type EntityTable } from "dexie";
 
-export type DirectoryId = "root" | number;
-
 interface DirectoryInfo {
   id: number;
   parentId: DirectoryId;
@@ -18,8 +16,6 @@ interface FileInfo {
   categoryIds: number[];
 }
 
-export type CategoryId = "root" | number;
-
 interface CategoryInfo {
   id: number;
   parentId: CategoryId;

src/lib/modules/file/index.ts

@@ -1,3 +1,3 @@
 export * from "./cache";
 export * from "./download";
-export * from "./upload";
+export * from "./upload.svelte";

src/lib/modules/file/upload.svelte.ts

@@ -1,7 +1,6 @@
 import axios from "axios";
 import ExifReader from "exifreader";
 import { limitFunction } from "p-limit";
-import { writable, type Writable } from "svelte/store";
 import {
   encodeToBase64,
   generateDataKey,
@@ -17,14 +16,45 @@ import type {
   FileUploadRequest,
   FileUploadResponse,
 } from "$lib/server/schemas";
-import {
-  fileUploadStatusStore,
-  type MasterKey,
-  type HmacSecret,
-  type FileUploadStatus,
-} from "$lib/stores";
+import type { MasterKey, HmacSecret } from "$lib/stores";
 import { trpc } from "$trpc/client";
 
+export interface FileUploadState {
+  name: string;
+  parentId: DirectoryId;
+  status:
+    | "encryption-pending"
+    | "encrypting"
+    | "upload-pending"
+    | "uploading"
+    | "uploaded"
+    | "canceled"
+    | "error";
+  progress?: number;
+  rate?: number;
+  estimated?: number;
+}
+
+export type LiveFileUploadState = FileUploadState & {
+  status: "encryption-pending" | "encrypting" | "upload-pending" | "uploading";
+};
+
+let uploadingFiles: FileUploadState[] = $state([]);
+
+const isFileUploading = (status: FileUploadState["status"]) =>
+  ["encryption-pending", "encrypting", "upload-pending", "uploading"].includes(status);
+
+export const getUploadingFiles = (parentId?: DirectoryId) => {
+  return uploadingFiles.filter(
+    (file): file is LiveFileUploadState =>
+      (parentId === undefined || file.parentId === parentId) && isFileUploading(file.status),
+  );
+};
+
+export const clearUploadedFiles = () => {
+  uploadingFiles = uploadingFiles.filter((file) => isFileUploading(file.status));
+};
+
 const requestDuplicateFileScan = limitFunction(
   async (file: File, hmacSecret: HmacSecret, onDuplicate: () => Promise<boolean>) => {
     const fileBuffer = await file.arrayBuffer();
@@ -76,16 +106,8 @@ const extractExifDateTime = (fileBuffer: ArrayBuffer) => {
 };
 
 const encryptFile = limitFunction(
-  async (
-    status: Writable<FileUploadStatus>,
-    file: File,
-    fileBuffer: ArrayBuffer,
-    masterKey: MasterKey,
-  ) => {
-    status.update((value) => {
-      value.status = "encrypting";
-      return value;
-    });
+  async (state: FileUploadState, file: File, fileBuffer: ArrayBuffer, masterKey: MasterKey) => {
+    state.status = "encrypting";
 
     const fileType = getFileType(file);
 
@@ -109,10 +131,7 @@ const encryptFile = limitFunction(
     const thumbnailBuffer = await thumbnail?.arrayBuffer();
     const thumbnailEncrypted = thumbnailBuffer && (await encryptData(thumbnailBuffer, dataKey));
 
-    status.update((value) => {
-      value.status = "upload-pending";
-      return value;
-    });
+    state.status = "upload-pending";
 
     return {
       dataKeyWrapped,
@@ -130,20 +149,14 @@ const encryptFile = limitFunction(
 );
 
 const requestFileUpload = limitFunction(
-  async (status: Writable<FileUploadStatus>, form: FormData, thumbnailForm: FormData | null) => {
-    status.update((value) => {
-      value.status = "uploading";
-      return value;
-    });
+  async (state: FileUploadState, form: FormData, thumbnailForm: FormData | null) => {
+    state.status = "uploading";
 
     const res = await axios.post("/api/file/upload", form, {
       onUploadProgress: ({ progress, rate, estimated }) => {
-        status.update((value) => {
-          value.progress = progress;
-          value.rate = rate;
-          value.estimated = estimated;
-          return value;
-        });
+        state.progress = progress;
+        state.rate = rate;
+        state.estimated = estimated;
       },
     });
     const { file }: FileUploadResponse = res.data;
@@ -157,10 +170,7 @@ const requestFileUpload = limitFunction(
       }
     }
 
-    status.update((value) => {
-      value.status = "uploaded";
-      return value;
-    });
+    state.status = "uploaded";
 
     return { fileId: file };
   },
@@ -176,15 +186,12 @@ export const uploadFile = async (
 ): Promise<
   { fileId: number; fileBuffer: ArrayBuffer; thumbnailBuffer?: ArrayBuffer } | undefined
 > => {
-  const status = writable<FileUploadStatus>({
+  uploadingFiles.push({
     name: file.name,
     parentId,
     status: "encryption-pending",
   });
-  fileUploadStatusStore.update((value) => {
-    value.push(status);
-    return value;
-  });
+  const state = uploadingFiles.at(-1)!;
 
   try {
     const { fileBuffer, fileSigned } = await requestDuplicateFileScan(
@@ -193,14 +200,8 @@ export const uploadFile = async (
       onDuplicate,
     );
     if (!fileBuffer || !fileSigned) {
-      status.update((value) => {
-        value.status = "canceled";
-        return value;
-      });
-      fileUploadStatusStore.update((value) => {
-        value = value.filter((v) => v !== status);
-        return value;
-      });
+      state.status = "canceled";
+      uploadingFiles = uploadingFiles.filter((file) => file !== state);
       return undefined;
     }
 
@@ -214,7 +215,7 @@ export const uploadFile = async (
       createdAtEncrypted,
       lastModifiedAtEncrypted,
       thumbnail,
-    } = await encryptFile(status, file, fileBuffer, masterKey);
+    } = await encryptFile(state, file, fileBuffer, masterKey);
 
     const form = new FormData();
     form.set(
@@ -252,13 +253,10 @@ export const uploadFile = async (
       thumbnailForm.set("content", new Blob([thumbnail.ciphertext]));
     }
 
-    const { fileId } = await requestFileUpload(status, form, thumbnailForm);
+    const { fileId } = await requestFileUpload(state, form, thumbnailForm);
     return { fileId, fileBuffer, thumbnailBuffer: thumbnail?.plaintext };
   } catch (e) {
-    status.update((value) => {
-      value.status = "error";
-      return value;
-    });
+    state.status = "error";
     throw e;
   }
 };

src/lib/modules/filesystem.ts

@@ -1,44 +1,11 @@
-import { TRPCClientError } from "@trpc/client";
 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 } from "$trpc/client";
-
-export type DirectoryInfo =
-  | {
-      id: "root";
-      parentId?: undefined;
-      dataKey?: undefined;
-      dataKeyVersion?: undefined;
-      name?: undefined;
-      subDirectoryIds: number[];
-      fileIds: number[];
-    }
-  | {
-      id: number;
-      parentId: DirectoryId;
-      dataKey?: CryptoKey;
-      dataKeyVersion?: Date;
-      name: string;
-      subDirectoryIds: number[];
-      fileIds: number[];
-    };
+import { trpc, isTRPCClientError } from "$trpc/client";
 
 export interface FileInfo {
   id: number;
@@ -53,117 +20,7 @@ export interface FileInfo {
   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 (e instanceof TRPCClientError && 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;
@@ -187,7 +44,7 @@ const fetchFileInfoFromServer = async (
   try {
     metadata = await trpc().file.get.query({ id });
   } catch (e) {
-    if (e instanceof TRPCClientError && e.data?.code === "NOT_FOUND") {
+    if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
       info.set(null);
       await deleteFileInfo(id);
       return;
@@ -247,124 +104,3 @@ export const getFileInfo = (fileId: number, masterKey: CryptoKey) => {
   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 (e instanceof TRPCClientError && 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.svelte.ts

@@ -0,0 +1,341 @@
+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,
+} from "$lib/indexedDB";
+import { unwrapDataKey, decryptString } from "$lib/modules/crypto";
+import { monotonicResolve } from "$lib/utils";
+import { trpc, isTRPCClientError } from "$trpc/client";
+
+type DataKey = { key: CryptoKey; version: Date };
+
+interface LocalDirectoryInfo {
+  id: number;
+  parentId: DirectoryId;
+  dataKey?: DataKey;
+  name: string;
+  subDirectories: SubDirectoryInfo[];
+  files: SummarizedFileInfo[];
+}
+
+interface RootDirectoryInfo {
+  id: "root";
+  parentId?: undefined;
+  dataKey?: undefined;
+  dataKeyVersion?: undefined;
+  name?: undefined;
+  subDirectories: SubDirectoryInfo[];
+  files: SummarizedFileInfo[];
+}
+
+export type DirectoryInfo = LocalDirectoryInfo | RootDirectoryInfo;
+export type SubDirectoryInfo = Omit<LocalDirectoryInfo, "parentId" | "subDirectories" | "files">;
+
+interface FileInfo {
+  id: number;
+  parentId: DirectoryId;
+  dataKey?: DataKey;
+  contentType: string;
+  contentIv: string | undefined;
+  name: string;
+  createdAt?: Date;
+  lastModifiedAt: Date;
+  categories: { id: number; name: string }[];
+}
+
+export type SummarizedFileInfo = Omit<FileInfo, "parentId" | "contentIv" | "categories">;
+export type CategoryFileInfo = SummarizedFileInfo & { isRecursive: boolean };
+
+interface LocalCategoryInfo {
+  id: number;
+  dataKey?: DataKey | undefined;
+  name: string;
+  subCategories: SubCategoryInfo[];
+  files: CategoryFileInfo[];
+  isFileRecursive: boolean;
+}
+
+interface RootCategoryInfo {
+  id: "root";
+  dataKey?: undefined;
+  name?: undefined;
+  subCategories: SubCategoryInfo[];
+  files?: undefined;
+  isFileRecursive?: undefined;
+}
+
+export type CategoryInfo = LocalCategoryInfo | RootCategoryInfo;
+export type SubCategoryInfo = Omit<
+  LocalCategoryInfo,
+  "subCategories" | "files" | "isFileRecursive"
+>;
+
+const directoryInfoCache = new Map<DirectoryId, DirectoryInfo | Promise<DirectoryInfo>>();
+const categoryInfoCache = new Map<CategoryId, CategoryInfo | Promise<CategoryInfo>>();
+
+export const getDirectoryInfo = async (id: DirectoryId, masterKey: CryptoKey) => {
+  const info = directoryInfoCache.get(id);
+  if (info instanceof Promise) {
+    return info;
+  }
+
+  const { promise, resolve } = Promise.withResolvers<DirectoryInfo>();
+  if (!info) {
+    directoryInfoCache.set(id, promise);
+  }
+
+  monotonicResolve(
+    [!info && fetchDirectoryInfoFromIndexedDB(id), fetchDirectoryInfoFromServer(id, masterKey)],
+    (directoryInfo) => {
+      let info = directoryInfoCache.get(id);
+      if (info instanceof Promise) {
+        const state = $state(directoryInfo);
+        directoryInfoCache.set(id, state);
+        resolve(state);
+      } else {
+        Object.assign(info!, directoryInfo);
+        resolve(info!);
+      }
+    },
+  );
+  return info ?? promise;
+};
+
+const fetchDirectoryInfoFromIndexedDB = async (
+  id: DirectoryId,
+): Promise<DirectoryInfo | undefined> => {
+  const [directory, subDirectories, files] = await Promise.all([
+    id !== "root" ? getDirectoryInfoFromIndexedDB(id) : undefined,
+    getDirectoryInfosFromIndexedDB(id),
+    getFileInfosFromIndexedDB(id),
+  ]);
+
+  if (id === "root") {
+    return { id, subDirectories, files };
+  } else if (directory) {
+    return { id, parentId: directory.parentId, name: directory.name, subDirectories, files };
+  }
+};
+
+const fetchDirectoryInfoFromServer = async (
+  id: DirectoryId,
+  masterKey: CryptoKey,
+): Promise<DirectoryInfo | undefined> => {
+  try {
+    const {
+      metadata,
+      subDirectories: subDirectoriesRaw,
+      files: filesRaw,
+    } = await trpc().directory.get.query({ id });
+    const [subDirectories, files] = await Promise.all([
+      Promise.all(
+        subDirectoriesRaw.map(async (directory) => {
+          const { dataKey } = await unwrapDataKey(directory.dek, masterKey);
+          const name = await decryptString(directory.name, directory.nameIv, dataKey);
+          return {
+            id: directory.id,
+            dataKey: { key: dataKey, version: directory.dekVersion },
+            name,
+          };
+        }),
+      ),
+      Promise.all(
+        filesRaw.map(async (file) => {
+          const { dataKey } = await unwrapDataKey(file.dek, masterKey);
+          const [name, createdAt, lastModifiedAt] = await Promise.all([
+            decryptString(file.name, file.nameIv, dataKey),
+            file.createdAt ? decryptDate(file.createdAt, file.createdAtIv!, dataKey) : undefined,
+            decryptDate(file.lastModifiedAt, file.lastModifiedAtIv, dataKey),
+          ]);
+          return {
+            id: file.id,
+            dataKey: { key: dataKey, version: file.dekVersion },
+            contentType: file.contentType,
+            name,
+            createdAt,
+            lastModifiedAt,
+          };
+        }),
+      ),
+    ]);
+
+    if (id === "root") {
+      return { id, subDirectories, files };
+    } else {
+      const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
+      const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
+      return {
+        id,
+        parentId: metadata!.parent,
+        dataKey: { key: dataKey, version: metadata!.dekVersion },
+        name,
+        subDirectories,
+        files,
+      };
+    }
+  } catch (e) {
+    if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
+      directoryInfoCache.delete(id);
+      await deleteDirectoryInfo(id as number);
+      return;
+    }
+    throw new Error("Failed to fetch directory information");
+  }
+};
+
+const decryptDate = async (ciphertext: string, iv: string, dataKey: CryptoKey) => {
+  return new Date(parseInt(await decryptString(ciphertext, iv, dataKey), 10));
+};
+
+export const getCategoryInfo = async (id: CategoryId, masterKey: CryptoKey) => {
+  const info = categoryInfoCache.get(id);
+  if (info instanceof Promise) {
+    return info;
+  }
+
+  const { promise, resolve } = Promise.withResolvers<CategoryInfo>();
+  if (!info) {
+    categoryInfoCache.set(id, promise);
+    const categoryInfo = await fetchCategoryInfoFromIndexedDB(id);
+    if (categoryInfo) {
+      const state = $state(categoryInfo);
+      categoryInfoCache.set(id, state);
+      resolve(state);
+    }
+  }
+
+  fetchCategoryInfoFromServer(id, masterKey).then((categoryInfo) => {
+    if (!categoryInfo) return;
+
+    let info = categoryInfoCache.get(id);
+    if (info instanceof Promise) {
+      const state = $state(categoryInfo);
+      categoryInfoCache.set(id, state);
+      resolve(state);
+    } else {
+      Object.assign(info!, categoryInfo);
+      resolve(info!);
+    }
+  });
+
+  return info ?? promise;
+};
+
+const fetchCategoryInfoFromIndexedDB = async (
+  id: CategoryId,
+): Promise<CategoryInfo | undefined> => {
+  const [category, subCategories] = await Promise.all([
+    id !== "root" ? getCategoryInfoFromIndexedDB(id) : undefined,
+    getCategoryInfosFromIndexedDB(id),
+  ]);
+  const files = category
+    ? await Promise.all(
+        category.files.map(async (file) => {
+          const fileInfo = await getFileInfoFromIndexedDB(file.id);
+          return fileInfo
+            ? {
+                id: file.id,
+                contentType: fileInfo.contentType,
+                name: fileInfo.name,
+                createdAt: fileInfo.createdAt,
+                lastModifiedAt: fileInfo.lastModifiedAt,
+                isRecursive: file.isRecursive,
+              }
+            : undefined;
+        }),
+      )
+    : undefined;
+
+  if (id === "root") {
+    return { id, subCategories };
+  } else if (category) {
+    return {
+      id,
+      name: category.name,
+      subCategories,
+      files: files!.filter((file) => !!file),
+      isFileRecursive: category.isFileRecursive,
+    };
+  }
+};
+
+const fetchCategoryInfoFromServer = async (
+  id: CategoryId,
+  masterKey: CryptoKey,
+): Promise<CategoryInfo | undefined> => {
+  try {
+    const {
+      metadata,
+      subCategories: subCategoriesRaw,
+      files: filesRaw,
+    } = await trpc().category.get.query({ id, recurse: true });
+    const [subCategories, files] = await Promise.all([
+      Promise.all(
+        subCategoriesRaw.map(async (category) => {
+          const { dataKey } = await unwrapDataKey(category.dek, masterKey);
+          const name = await decryptString(category.name, category.nameIv, dataKey);
+          return {
+            id: category.id,
+            dataKey: { key: dataKey, version: category.dekVersion },
+            name,
+          };
+        }),
+      ),
+      id !== "root"
+        ? Promise.all(
+            filesRaw!.map(async (file) => {
+              const { dataKey } = await unwrapDataKey(file.dek, masterKey);
+              const [name, createdAt, lastModifiedAt] = await Promise.all([
+                decryptString(file.name, file.nameIv, dataKey),
+                file.createdAt
+                  ? decryptDate(file.createdAt, file.createdAtIv!, dataKey)
+                  : undefined,
+                decryptDate(file.lastModifiedAt, file.lastModifiedAtIv, dataKey),
+              ]);
+              return {
+                id: file.id,
+                dataKey: { key: dataKey, version: file.dekVersion },
+                contentType: file.contentType,
+                name,
+                createdAt,
+                lastModifiedAt,
+                isRecursive: file.isRecursive,
+              };
+            }),
+          )
+        : undefined,
+    ]);
+
+    if (id === "root") {
+      return { id, subCategories };
+    } else {
+      const { dataKey } = await unwrapDataKey(metadata!.dek, masterKey);
+      const name = await decryptString(metadata!.name, metadata!.nameIv, dataKey);
+      return {
+        id,
+        dataKey: { key: dataKey, version: metadata!.dekVersion },
+        name,
+        subCategories,
+        files: files!,
+        isFileRecursive: false,
+      };
+    }
+  } catch (e) {
+    if (isTRPCClientError(e) && e.data?.code === "NOT_FOUND") {
+      categoryInfoCache.delete(id);
+      await deleteCategoryInfo(id as number);
+      return;
+    }
+    throw new Error("Failed to fetch category information");
+  }
+};

src/lib/server/db/category.ts

@@ -2,8 +2,6 @@ import { IntegrityError } from "./error";
 import db from "./kysely";
 import type { Ciphertext } from "./schema";
 
-export type CategoryId = "root" | number;
-
 interface Category {
   id: number;
   parentId: CategoryId;

src/lib/server/db/file.ts

@@ -4,8 +4,6 @@ import { IntegrityError } from "./error";
 import db from "./kysely";
 import type { Ciphertext } from "./schema";
 
-export type DirectoryId = "root" | number;
-
 interface Directory {
   id: number;
   parentId: DirectoryId;
@@ -306,39 +304,51 @@ export const getAllFilesByCategory = async (
   recurse: boolean,
 ) => {
   const files = await db
-    .withRecursive("cte", (db) =>
+    .withRecursive("category_tree", (db) =>
       db
         .selectFrom("category")
-        .leftJoin("file_category", "category.id", "file_category.category_id")
-        .select(["id", "parent_id", "user_id", "file_category.file_id"])
-        .select(sql<number>`0`.as("depth"))
+        .select(["id", sql<number>`0`.as("depth")])
         .where("id", "=", categoryId)
+        .where("user_id", "=", userId)
         .$if(recurse, (qb) =>
           qb.unionAll((db) =>
             db
               .selectFrom("category")
-              .leftJoin("file_category", "category.id", "file_category.category_id")
-              .innerJoin("cte", "category.parent_id", "cte.id")
-              .select([
-                "category.id",
-                "category.parent_id",
-                "category.user_id",
-                "file_category.file_id",
-              ])
-              .select(sql<number>`cte.depth + 1`.as("depth")),
+              .innerJoin("category_tree", "category.parent_id", "category_tree.id")
+              .select(["category.id", sql<number>`depth + 1`.as("depth")]),
           ),
         ),
     )
-    .selectFrom("cte")
+    .selectFrom("category_tree")
+    .innerJoin("file_category", "category_tree.id", "file_category.category_id")
+    .innerJoin("file", "file_category.file_id", "file.id")
     .select(["file_id", "depth"])
+    .selectAll("file")
     .distinctOn("file_id")
-    .where("user_id", "=", userId)
-    .where("file_id", "is not", null)
-    .$narrowType<{ file_id: NotNull }>()
     .orderBy("file_id")
     .orderBy("depth")
     .execute();
-  return files.map(({ file_id, depth }) => ({ id: file_id, isRecursive: depth > 0 }));
+  return files.map(
+    (file) =>
+      ({
+        id: file.file_id,
+        parentId: file.parent_id ?? "root",
+        userId: file.user_id,
+        path: file.path,
+        mekVersion: file.master_encryption_key_version,
+        encDek: file.encrypted_data_encryption_key,
+        dekVersion: file.data_encryption_key_version,
+        hskVersion: file.hmac_secret_key_version,
+        contentHmac: file.content_hmac,
+        contentType: file.content_type,
+        encContentIv: file.encrypted_content_iv,
+        encContentHash: file.encrypted_content_hash,
+        encName: file.encrypted_name,
+        encCreatedAt: file.encrypted_created_at,
+        encLastModifiedAt: file.encrypted_last_modified_at,
+        isRecursive: file.depth > 0,
+      }) satisfies File & { isRecursive: boolean },
+  );
 };
 
 export const getAllFileIds = async (userId: number) => {

src/lib/services/auth.ts

@@ -1,6 +1,5 @@
-import { TRPCClientError } from "@trpc/client";
 import { encodeToBase64, decryptChallenge, signMessageRSA } from "$lib/modules/crypto";
-import { trpc } from "$trpc/client";
+import { trpc, isTRPCClientError } from "$trpc/client";
 
 export const requestSessionUpgrade = async (
   encryptKeyBase64: string,
@@ -16,7 +15,7 @@ export const requestSessionUpgrade = async (
       sigPubKey: verifyKeyBase64,
     }));
   } catch (e) {
-    if (e instanceof TRPCClientError && e.data?.code === "FORBIDDEN") {
+    if (isTRPCClientError(e) && e.data?.code === "FORBIDDEN") {
       return [false, "Unregistered client"] as const;
     }
     return [false] as const;
@@ -31,7 +30,7 @@ export const requestSessionUpgrade = async (
       force,
     });
   } catch (e) {
-    if (e instanceof TRPCClientError && e.data?.code === "CONFLICT") {
+    if (isTRPCClientError(e) && e.data?.code === "CONFLICT") {
       return [false, "Already logged in"] as const;
     }
     return [false] as const;

src/lib/services/key.ts

@@ -1,4 +1,3 @@
-import { TRPCClientError } from "@trpc/client";
 import { storeMasterKeys } from "$lib/indexedDB";
 import {
   encodeToBase64,
@@ -11,7 +10,7 @@ import {
 } from "$lib/modules/crypto";
 import { requestSessionUpgrade } from "$lib/services/auth";
 import { masterKeyStore, type ClientKeys } from "$lib/stores";
-import { trpc } from "$trpc/client";
+import { trpc, isTRPCClientError } from "$trpc/client";
 
 export const requestClientRegistration = async (
   encryptKeyBase64: string,
@@ -112,10 +111,7 @@ export const requestInitialMasterKeyAndHmacSecretRegistration = async (
       mekSig: await signMasterKeyWrapped(masterKeyWrapped, 1, signKey),
     });
   } catch (e) {
-    if (
-      e instanceof TRPCClientError &&
-      (e.data?.code === "FORBIDDEN" || e.data?.code === "CONFLICT")
-    ) {
+    if (isTRPCClientError(e) && (e.data?.code === "FORBIDDEN" || e.data?.code === "CONFLICT")) {
       return true;
     }
     // TODO: Error Handling

src/lib/stores/file.ts

@@ -1,21 +1,5 @@
 import { writable, type Writable } from "svelte/store";
 
-export interface FileUploadStatus {
-  name: string;
-  parentId: "root" | number;
-  status:
-    | "encryption-pending"
-    | "encrypting"
-    | "upload-pending"
-    | "uploading"
-    | "uploaded"
-    | "canceled"
-    | "error";
-  progress?: number;
-  rate?: number;
-  estimated?: number;
-}
-
 export interface FileDownloadStatus {
   id: number;
   status:
@@ -32,16 +16,8 @@ export interface FileDownloadStatus {
   result?: ArrayBuffer;
 }
 
-export const fileUploadStatusStore = writable<Writable<FileUploadStatus>[]>([]);
-
 export const fileDownloadStatusStore = writable<Writable<FileDownloadStatus>[]>([]);
 
-export const isFileUploading = (
-  status: FileUploadStatus["status"],
-): status is "encryption-pending" | "encrypting" | "upload-pending" | "uploading" => {
-  return ["encryption-pending", "encrypting", "upload-pending", "uploading"].includes(status);
-};
-
 export const isFileDownloading = (
   status: FileDownloadStatus["status"],
 ): status is "download-pending" | "downloading" | "decryption-pending" | "decrypting" => {

src/lib/types/filesystem.d.ts

@@ -0,0 +1,2 @@
+type DirectoryId = "root" | number;
+type CategoryId = "root" | number;

src/lib/utils/index.ts

@@ -1,3 +1,4 @@
 export * from "./format";
 export * from "./gotoStateful";
+export * from "./promise";
 export * from "./sort";

src/lib/utils/promise.ts

@@ -0,0 +1,16 @@
+export const monotonicResolve = <T>(
+  promises: (Promise<T | undefined> | false)[],
+  callback: (value: T) => void,
+) => {
+  let latestResolvedIndex = -1;
+
+  promises.forEach((promise, index) => {
+    if (!promise) return;
+    promise.then((value) => {
+      if (value !== undefined && index > latestResolvedIndex) {
+        latestResolvedIndex = index;
+        callback(value);
+      }
+    });
+  });
+};

src/lib/utils/sort.ts

@@ -32,7 +32,7 @@ const sortByDateAsc: SortFunc = ({ date: a }, { date: b }) => {
 
 const sortByDateDesc: SortFunc = (a, b) => -sortByDateAsc(a, b);
 
-export const sortEntries = <T extends SortEntry>(entries: T[], sortBy: SortBy) => {
+export const sortEntries = <T extends SortEntry>(entries: T[], sortBy = SortBy.NAME_ASC) => {
   let sortFunc: SortFunc;
 
   switch (sortBy) {
@@ -54,4 +54,5 @@ export const sortEntries = <T extends SortEntry>(entries: T[], sortBy: SortBy) =
   }
 
   entries.sort(sortFunc);
+  return entries;
 };

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

@@ -6,12 +6,7 @@
   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 { getFileInfo, type FileInfo } from "$lib/modules/filesystem";
   import { captureVideoThumbnail } from "$lib/modules/thumbnail";
   import { fileDownloadStatusStore, isFileDownloading, masterKeyStore } from "$lib/stores";
   import AddToCategoryBottomSheet from "./AddToCategoryBottomSheet.svelte";
@@ -32,7 +27,7 @@
   let { data } = $props();
 
   let info: Writable<FileInfo | null> | undefined = $state();
-  let categories: Writable<CategoryInfo | null>[] = $state([]);
+  // let categories: Writable<CategoryInfo | null>[] = $state([]);
 
   let isMenuOpen = $state(false);
   let isAddToCategoryBottomSheetOpen = $state(false);
@@ -90,10 +85,10 @@
     viewerType = undefined;
   });
 
-  $effect(() => {
-    categories =
-      $info?.categoryIds.map((id) => getCategoryInfo(id, $masterKeyStore?.get(1)?.key!)) ?? [];
-  });
+  // $effect(() => {
+  //   categories =
+  //     $info?.categoryIds.map((id) => getCategoryInfo(id, $masterKeyStore?.get(1)?.key!)) ?? [];
+  // });
 
   $effect(() => {
     if ($info && $info.dataKey && $info.contentIv) {
@@ -145,7 +140,9 @@
     </button>
     <TopBarMenu
       bind:isOpen={isMenuOpen}
-      directoryId={page.url.searchParams.get("from") === "category" ? $info?.parentId : undefined}
+      directoryId={["category", "gallery"].includes(page.url.searchParams.get("from") ?? "")
+        ? $info?.parentId
+        : undefined}
       {fileBlob}
       filename={$info?.name}
     />
@@ -188,12 +185,12 @@
     <div class="space-y-2">
       <p class="text-lg font-bold">카테고리</p>
       <div class="space-y-1">
-        <Categories
+        <!-- <Categories
           {categories}
           categoryMenuIcon={IconClose}
           onCategoryClick={({ id }) => goto(`/category/${id}`)}
           onCategoryMenuClick={({ id }) => removeFromCategory(id)}
-        />
+        /> -->
         <IconEntryButton
           icon={IconAddCircle}
           onclick={() => (isAddToCategoryBottomSheetOpen = true)}

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 CategoryInfo } from "$lib/modules/filesystem2.svelte";
   import { masterKeyStore } from "$lib/stores";
   import { requestCategoryCreation } from "./service";
 
@@ -14,46 +13,48 @@
 
   let { onAddToCategoryClick, isOpen = $bindable() }: Props = $props();
 
-  let category: Writable<CategoryInfo | null> | undefined = $state();
+  let categoryInfoPromise: Promise<CategoryInfo | null> | undefined = $state();
 
   let isCategoryCreateModalOpen = $state(false);
 
   $effect(() => {
     if (isOpen) {
-      category = getCategoryInfo("root", $masterKeyStore?.get(1)?.key!);
+      categoryInfoPromise = getCategoryInfo("root", $masterKeyStore?.get(1)?.key!);
     }
   });
 </script>
 
-{#if $category}
-  <BottomSheet bind:isOpen class="flex flex-col">
-    <FullscreenDiv>
-      <SubCategories
-        class="py-4"
-        info={$category}
-        onSubCategoryClick={({ id }) =>
-          (category = getCategoryInfo(id, $masterKeyStore?.get(1)?.key!))}
-        onSubCategoryCreateClick={() => (isCategoryCreateModalOpen = true)}
-        subCategoryCreatePosition="top"
-      />
-      {#if $category.id !== "root"}
-        <BottomDiv>
-          <Button onclick={() => onAddToCategoryClick($category.id)} class="w-full">
-            이 카테고리에 추가하기
-          </Button>
-        </BottomDiv>
-      {/if}
-    </FullscreenDiv>
-  </BottomSheet>
-{/if}
+{#await categoryInfoPromise then categoryInfo}
+  {#if categoryInfo}
+    <BottomSheet bind:isOpen class="flex flex-col">
+      <FullscreenDiv>
+        <SubCategories
+          class="py-4"
+          info={categoryInfo}
+          onSubCategoryClick={({ id }) =>
+            (categoryInfoPromise = getCategoryInfo(id, $masterKeyStore?.get(1)?.key!))}
+          onSubCategoryCreateClick={() => (isCategoryCreateModalOpen = true)}
+          subCategoryCreatePosition="top"
+        />
+        {#if categoryInfo.id !== "root"}
+          <BottomDiv>
+            <Button onclick={() => onAddToCategoryClick(categoryInfo.id)} class="w-full">
+              이 카테고리에 추가하기
+            </Button>
+          </BottomDiv>
+        {/if}
+      </FullscreenDiv>
+    </BottomSheet>
 
-<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
-      return true;
-    }
-    return false;
-  }}
-/>
+    <CategoryCreateModal
+      bind:isOpen={isCategoryCreateModalOpen}
+      onCreateClick={async (name: string) => {
+        if (await requestCategoryCreation(name, categoryInfo.id, $masterKeyStore?.get(1)!)) {
+          categoryInfoPromise = getCategoryInfo(categoryInfo.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+          return true;
+        }
+        return false;
+      }}
+    />
+  {/if}
+{/await}

src/routes/(fullscreen)/file/uploads/+page.svelte

@@ -1,19 +1,10 @@
 <script lang="ts">
-  import { get } from "svelte/store";
   import { FullscreenDiv } from "$lib/components/atoms";
   import { TopBar } from "$lib/components/molecules";
-  import { fileUploadStatusStore, isFileUploading } from "$lib/stores";
+  import { getUploadingFiles, clearUploadedFiles } from "$lib/modules/file";
   import File from "./File.svelte";
 
-  let uploadingFiles = $derived(
-    $fileUploadStatusStore.filter((status) => isFileUploading(get(status).status)),
-  );
-
-  $effect(() => () => {
-    $fileUploadStatusStore = $fileUploadStatusStore.filter((status) =>
-      isFileUploading(get(status).status),
-    );
-  });
+  $effect(() => clearUploadedFiles);
 </script>
 
 <svelte:head>
@@ -23,8 +14,8 @@
 <TopBar />
 <FullscreenDiv>
   <div class="space-y-2 pb-4">
-    {#each uploadingFiles as status}
-      <File {status} />
+    {#each getUploadingFiles() as file}
+      <File state={file} />
     {/each}
   </div>
 </FullscreenDiv>

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

@@ -1,6 +1,5 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
-  import type { FileUploadStatus } from "$lib/stores";
+  import type { FileUploadState } from "$lib/modules/file";
   import { formatNetworkSpeed } from "$lib/utils";
 
   import IconPending from "~icons/material-symbols/pending";
@@ -11,45 +10,45 @@
   import IconError from "~icons/material-symbols/error";
 
   interface Props {
-    status: Writable<FileUploadStatus>;
+    state: FileUploadState;
   }
 
-  let { status }: Props = $props();
+  let { state }: Props = $props();
 </script>
 
 <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 === "encryption-pending"}
+    {#if state.status === "encryption-pending"}
       <IconPending />
-    {:else if $status.status === "encrypting"}
+    {:else if state.status === "encrypting"}
       <IconLockClock />
-    {:else if $status.status === "upload-pending"}
+    {:else if state.status === "upload-pending"}
       <IconCloud />
-    {:else if $status.status === "uploading"}
+    {:else if state.status === "uploading"}
       <IconCloudUpload />
-    {:else if $status.status === "uploaded"}
+    {:else if state.status === "uploaded"}
       <IconCloudDone class="text-blue-500" />
-    {:else if $status.status === "error"}
+    {:else if state.status === "error"}
       <IconError class="text-red-500" />
     {/if}
   </div>
   <div class="flex-grow overflow-hidden">
-    <p title={$status.name} class="truncate font-medium">
-      {$status.name}
+    <p title={state.name} class="truncate font-medium">
+      {state.name}
     </p>
     <p class="text-xs text-gray-800">
-      {#if $status.status === "encryption-pending"}
+      {#if state.status === "encryption-pending"}
         준비 중
-      {:else if $status.status === "encrypting"}
+      {:else if state.status === "encrypting"}
         암호화하는 중
-      {:else if $status.status === "upload-pending"}
+      {:else if state.status === "upload-pending"}
         업로드를 기다리는 중
-      {:else if $status.status === "uploading"}
+      {:else if state.status === "uploading"}
         전송됨
-        {Math.floor(($status.progress ?? 0) * 100)}% · {formatNetworkSpeed(($status.rate ?? 0) * 8)}
-      {:else if $status.status === "uploaded"}
+        {Math.floor((state.progress ?? 0) * 100)}% · {formatNetworkSpeed((state.rate ?? 0) * 8)}
+      {:else if state.status === "uploaded"}
         업로드 완료
-      {:else if $status.status === "error"}
+      {:else if state.status === "error"}
         업로드 실패
       {/if}
     </p>

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

@@ -0,0 +1,7 @@
+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

@@ -22,5 +22,5 @@
 
 <TopBar title="사진 및 동영상" />
 <FullscreenDiv>
-  <Gallery {files} onFileClick={({ id }) => goto(`/file/${id}`)} />
+  <Gallery {files} onFileClick={({ id }) => goto(`/file/${id}?from=gallery`)} />
 </FullscreenDiv>

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

@@ -1,7 +0,0 @@
-import { trpc } from "$trpc/client";
-import type { PageLoad } from "./$types";
-
-export const load: PageLoad = async ({ fetch }) => {
-  const files = await trpc(fetch).file.list.query();
-  return { files };
-};

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

@@ -0,0 +1,7 @@
+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.ts

@@ -1,7 +0,0 @@
-import { trpc } from "$trpc/client";
-import type { PageLoad } from "./$types";
-
-export const load: PageLoad = async ({ fetch }) => {
-  const files = await trpc(fetch).file.listWithoutThumbnail.query();
-  return { files };
-};

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, type CategoryInfo } from "$lib/modules/filesystem2.svelte";
   import { masterKeyStore } from "$lib/stores";
   import CategoryDeleteModal from "./CategoryDeleteModal.svelte";
   import CategoryMenuBottomSheet from "./CategoryMenuBottomSheet.svelte";
@@ -19,9 +18,7 @@
   let { data } = $props();
   let context = createContext();
 
-  let info: Writable<CategoryInfo | null> | undefined = $state();
-
-  let isFileRecursive: boolean | undefined = $state();
+  let infoPromise: Promise<CategoryInfo> | undefined = $state();
 
   let isCategoryCreateModalOpen = $state(false);
   let isCategoryMenuBottomSheetOpen = $state(false);
@@ -29,20 +26,7 @@
   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 });
-    }
+    infoPromise = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
   });
 </script>
 
@@ -50,68 +34,70 @@
   <title>카테고리</title>
 </svelte:head>
 
-{#if data.id !== "root"}
-  <TopBar title={$info?.name} />
-{/if}
-<div class="min-h-full bg-gray-100 pb-[5.5em]">
-  {#if $info && isFileRecursive !== undefined}
-    <Category
-      bind:isFileRecursive
-      info={$info}
-      onFileClick={({ id }) => goto(`/file/${id}?from=category`)}
-      onFileRemoveClick={async ({ id }) => {
-        await requestFileRemovalFromCategory(id, data.id as number);
-        info = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+{#await infoPromise then info}
+  {#if info}
+    {#if info.id !== "root"}
+      <TopBar title={info.name} />
+    {/if}
+    <div class="min-h-full bg-gray-100 pb-[5.5em]">
+      <Category
+        bind:isFileRecursive={info.isFileRecursive}
+        {info}
+        onFileClick={({ id }) => goto(`/file/${id}?from=category`)}
+        onFileRemoveClick={async ({ id }) => {
+          await requestFileRemovalFromCategory(id, data.id as number);
+          infoPromise = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+        }}
+        onSubCategoryClick={({ id }) => goto(`/category/${id}`)}
+        onSubCategoryCreateClick={() => (isCategoryCreateModalOpen = true)}
+        onSubCategoryMenuClick={(subCategory) => {
+          context.selectedCategory = subCategory;
+          isCategoryMenuBottomSheetOpen = true;
+        }}
+      />
+    </div>
+
+    <CategoryCreateModal
+      bind:isOpen={isCategoryCreateModalOpen}
+      onCreateClick={async (name: string) => {
+        if (await requestCategoryCreation(name, data.id, $masterKeyStore?.get(1)!)) {
+          infoPromise = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+          return true;
+        }
+        return false;
       }}
-      onSubCategoryClick={({ id }) => goto(`/category/${id}`)}
-      onSubCategoryCreateClick={() => (isCategoryCreateModalOpen = true)}
-      onSubCategoryMenuClick={(subCategory) => {
-        context.selectedCategory = subCategory;
-        isCategoryMenuBottomSheetOpen = true;
+    />
+
+    <CategoryMenuBottomSheet
+      bind:isOpen={isCategoryMenuBottomSheetOpen}
+      onRenameClick={() => {
+        isCategoryMenuBottomSheetOpen = false;
+        isCategoryRenameModalOpen = true;
+      }}
+      onDeleteClick={() => {
+        isCategoryMenuBottomSheetOpen = false;
+        isCategoryDeleteModalOpen = true;
+      }}
+    />
+    <CategoryRenameModal
+      bind:isOpen={isCategoryRenameModalOpen}
+      onRenameClick={async (newName: string) => {
+        if (await requestCategoryRename(context.selectedCategory!, newName)) {
+          infoPromise = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+          return true;
+        }
+        return false;
+      }}
+    />
+    <CategoryDeleteModal
+      bind:isOpen={isCategoryDeleteModalOpen}
+      onDeleteClick={async () => {
+        if (await requestCategoryDeletion(context.selectedCategory!)) {
+          infoPromise = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+          return true;
+        }
+        return false;
       }}
     />
   {/if}
-</div>
-
-<CategoryCreateModal
-  bind:isOpen={isCategoryCreateModalOpen}
-  onCreateClick={async (name: string) => {
-    if (await requestCategoryCreation(name, data.id, $masterKeyStore?.get(1)!)) {
-      info = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
-      return true;
-    }
-    return false;
-  }}
-/>
-
-<CategoryMenuBottomSheet
-  bind:isOpen={isCategoryMenuBottomSheetOpen}
-  onRenameClick={() => {
-    isCategoryMenuBottomSheetOpen = false;
-    isCategoryRenameModalOpen = true;
-  }}
-  onDeleteClick={() => {
-    isCategoryMenuBottomSheetOpen = false;
-    isCategoryDeleteModalOpen = true;
-  }}
-/>
-<CategoryRenameModal
-  bind:isOpen={isCategoryRenameModalOpen}
-  onRenameClick={async (newName: string) => {
-    if (await requestCategoryRename(context.selectedCategory!, newName)) {
-      info = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
-      return true;
-    }
-    return false;
-  }}
-/>
-<CategoryDeleteModal
-  bind:isOpen={isCategoryDeleteModalOpen}
-  onDeleteClick={async () => {
-    if (await requestCategoryDeletion(context.selectedCategory!)) {
-      info = getCategoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
-      return true;
-    }
-    return false;
-  }}
-/>
+{/await}

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

@@ -17,12 +17,17 @@ export const useContext = () => {
 };
 
 export const requestCategoryRename = async (category: SelectedCategory, newName: string) => {
-  const newNameEncrypted = await encryptString(newName, category.dataKey);
+  if (!category.dataKey) {
+    // TODO: Error Handling
+    return false;
+  }
+
+  const newNameEncrypted = await encryptString(newName, category.dataKey.key);
 
   try {
     await trpc().category.rename.mutate({
       id: category.id,
-      dekVersion: category.dataKeyVersion,
+      dekVersion: category.dataKey.version,
       name: newNameEncrypted.ciphertext,
       nameIv: newNameEncrypted.iv,
     });

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

@@ -1,11 +1,10 @@
 <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 "$lib/modules/filesystem";
+  import { getDirectoryInfo, type DirectoryInfo } from "$lib/modules/filesystem2.svelte";
   import { masterKeyStore, hmacSecretStore } from "$lib/stores";
   import DirectoryCreateModal from "./DirectoryCreateModal.svelte";
   import DirectoryEntries from "./DirectoryEntries";
@@ -30,7 +29,7 @@
   let { data } = $props();
   let context = createContext();
 
-  let info: Writable<DirectoryInfo | null> | undefined = $state();
+  let infoPromise: Promise<DirectoryInfo> | undefined = $state();
   let fileInput: HTMLInputElement | undefined = $state();
   let duplicatedFile: File | undefined = $state();
   let resolveForDuplicateFileModal: ((res: boolean) => void) | undefined = $state();
@@ -61,7 +60,7 @@
         .then((res) => {
           if (!res) return;
           // TODO: FIXME
-          info = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
+          infoPromise = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
         })
         .catch((e: Error) => {
           // TODO: FIXME
@@ -79,7 +78,7 @@
   });
 
   $effect(() => {
-    info = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
+    infoPromise = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!);
   });
 </script>
 
@@ -89,106 +88,106 @@
 
 <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}
-  {#if $info}
-    <div class={["flex flex-grow flex-col px-4 pb-4", !showTopBar && "pt-4"]}>
-      <div class="flex gap-x-2">
-        <UploadStatusCard onclick={() => goto("/file/uploads")} />
-        <DownloadStatusCard onclick={() => goto("/file/downloads")} />
-      </div>
-      {#key $info}
+{#await infoPromise then info}
+  {#if info}
+    <div class="flex h-full flex-col">
+      {#if showTopBar}
+        <TopBar title={info.name} class="flex-shrink-0" />
+      {/if}
+      <div class={["flex flex-grow flex-col px-4 pb-4", !showTopBar && "pt-4"]}>
+        <div class="flex gap-x-2">
+          <UploadStatusCard onclick={() => goto("/file/uploads")} />
+          <DownloadStatusCard onclick={() => goto("/file/downloads")} />
+        </div>
         <DirectoryEntries
-          info={$info}
+          {info}
           onEntryClick={({ type, id }) => goto(`/${type}/${id}`)}
           onEntryMenuClick={(entry) => {
             context.selectedEntry = entry;
             isEntryMenuBottomSheetOpen = true;
           }}
-          showParentEntry={isFromFilePage && $info.parentId !== undefined}
+          showParentEntry={isFromFilePage && info.parentId !== undefined}
           onParentClick={() =>
             goto(
-              $info.parentId === "root"
+              info.parentId === "root"
                 ? "/directory?from=file"
-                : `/directory/${$info.parentId}?from=file`,
+                : `/directory/${info.parentId}?from=file`,
             )}
         />
-      {/key}
+      </div>
     </div>
+
+    <FloatingButton
+      icon={IconAdd}
+      onclick={() => {
+        isEntryCreateBottomSheetOpen = true;
+      }}
+      class="bottom-24 right-4"
+    />
+    <EntryCreateBottomSheet
+      bind:isOpen={isEntryCreateBottomSheetOpen}
+      onDirectoryCreateClick={() => {
+        isEntryCreateBottomSheetOpen = false;
+        isDirectoryCreateModalOpen = true;
+      }}
+      onFileUploadClick={() => {
+        isEntryCreateBottomSheetOpen = false;
+        fileInput?.click();
+      }}
+    />
+    <DirectoryCreateModal
+      bind:isOpen={isDirectoryCreateModalOpen}
+      onCreateClick={async (name) => {
+        if (await requestDirectoryCreation(name, data.id, $masterKeyStore?.get(1)!)) {
+          infoPromise = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+          return true;
+        }
+        return false;
+      }}
+    />
+    <DuplicateFileModal
+      bind:isOpen={isDuplicateFileModalOpen}
+      file={duplicatedFile}
+      onbeforeclose={() => {
+        resolveForDuplicateFileModal?.(false);
+        isDuplicateFileModalOpen = false;
+      }}
+      onUploadClick={() => {
+        resolveForDuplicateFileModal?.(true);
+        isDuplicateFileModalOpen = false;
+      }}
+    />
+
+    <EntryMenuBottomSheet
+      bind:isOpen={isEntryMenuBottomSheetOpen}
+      onRenameClick={() => {
+        isEntryMenuBottomSheetOpen = false;
+        isEntryRenameModalOpen = true;
+      }}
+      onDeleteClick={() => {
+        isEntryMenuBottomSheetOpen = false;
+        isEntryDeleteModalOpen = true;
+      }}
+    />
+    <EntryRenameModal
+      bind:isOpen={isEntryRenameModalOpen}
+      onRenameClick={async (newName: string) => {
+        if (await requestEntryRename(context.selectedEntry!, newName)) {
+          infoPromise = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+          return true;
+        }
+        return false;
+      }}
+    />
+    <EntryDeleteModal
+      bind:isOpen={isEntryDeleteModalOpen}
+      onDeleteClick={async () => {
+        if (await requestEntryDeletion(context.selectedEntry!)) {
+          infoPromise = getDirectoryInfo(data.id, $masterKeyStore?.get(1)?.key!); // TODO: FIXME
+          return true;
+        }
+        return false;
+      }}
+    />
   {/if}
-</div>
-
-<FloatingButton
-  icon={IconAdd}
-  onclick={() => {
-    isEntryCreateBottomSheetOpen = true;
-  }}
-  class="bottom-24 right-4"
-/>
-<EntryCreateBottomSheet
-  bind:isOpen={isEntryCreateBottomSheetOpen}
-  onDirectoryCreateClick={() => {
-    isEntryCreateBottomSheetOpen = false;
-    isDirectoryCreateModalOpen = true;
-  }}
-  onFileUploadClick={() => {
-    isEntryCreateBottomSheetOpen = false;
-    fileInput?.click();
-  }}
-/>
-<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;
-  }}
-/>
-<DuplicateFileModal
-  bind:isOpen={isDuplicateFileModalOpen}
-  file={duplicatedFile}
-  onbeforeclose={() => {
-    resolveForDuplicateFileModal?.(false);
-    isDuplicateFileModalOpen = false;
-  }}
-  onUploadClick={() => {
-    resolveForDuplicateFileModal?.(true);
-    isDuplicateFileModalOpen = false;
-  }}
-/>
-
-<EntryMenuBottomSheet
-  bind:isOpen={isEntryMenuBottomSheetOpen}
-  onRenameClick={() => {
-    isEntryMenuBottomSheetOpen = false;
-    isEntryRenameModalOpen = true;
-  }}
-  onDeleteClick={() => {
-    isEntryMenuBottomSheetOpen = false;
-    isEntryDeleteModalOpen = true;
-  }}
-/>
-<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;
-    }
-    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;
-    }
-    return false;
-  }}
-/>
+{/await}

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

@@ -1,21 +1,9 @@
 <script lang="ts">
-  import { untrack } from "svelte";
-  import { get, type Writable } from "svelte/store";
-  import { ActionEntryButton } from "$lib/components/atoms";
+  import { ActionEntryButton, RowVirtualizer } from "$lib/components/atoms";
   import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import {
-    getDirectoryInfo,
-    getFileInfo,
-    type DirectoryInfo,
-    type FileInfo,
-  } from "$lib/modules/filesystem";
-  import {
-    fileUploadStatusStore,
-    isFileUploading,
-    masterKeyStore,
-    type FileUploadStatus,
-  } from "$lib/stores";
-  import { SortBy, sortEntries } from "$lib/utils";
+  import { getUploadingFiles, type LiveFileUploadState } from "$lib/modules/file";
+  import type { DirectoryInfo } from "$lib/modules/filesystem2.svelte";
+  import { sortEntries } from "$lib/utils";
   import File from "./File.svelte";
   import SubDirectory from "./SubDirectory.svelte";
   import UploadingFile from "./UploadingFile.svelte";
@@ -27,7 +15,6 @@
     onEntryMenuClick: (entry: SelectedEntry) => void;
     onParentClick?: () => void;
     showParentEntry?: boolean;
-    sortBy?: SortBy;
   }
 
   let {
@@ -36,104 +23,59 @@
     onEntryMenuClick,
     onParentClick,
     showParentEntry = false,
-    sortBy = SortBy.NAME_ASC,
   }: Props = $props();
 
-  interface DirectoryEntry {
-    name?: string;
-    info: Writable<DirectoryInfo | null>;
-  }
+  type Entry =
+    | { type: "parent" }
+    | { type: "directory"; name: string; details: (typeof info.subDirectories)[number] }
+    | { type: "file"; name: string; details: (typeof info.files)[number] }
+    | { type: "uploading-file"; name: string; details: LiveFileUploadState };
 
-  type FileEntry =
-    | {
-        type: "file";
-        name?: string;
-        info: Writable<FileInfo | null>;
-      }
-    | {
-        type: "uploading-file";
-        name: string;
-        info: Writable<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 };
+  const toEntry =
+    <T extends Exclude<Entry["type"], "parent">>(type: T) =>
+    (details: Extract<Entry, { type: T }>["details"]) => ({
+      type,
+      name: details.name,
+      details,
     });
-    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();
-            }),
-          ),
-        );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
+  let entries = $derived([
+    ...(showParentEntry ? ([{ type: "parent" }] as const) : []),
+    ...sortEntries(info.subDirectories.map(toEntry("directory"))),
+    ...sortEntries([
+      ...info.files.map(toEntry("file")),
+      ...getUploadingFiles(info.id).map(toEntry("uploading-file")),
+    ]),
+  ]);
 </script>
 
-{#if subDirectories.length + files.length > 0 || showParentEntry}
-  <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 }}
-      <SubDirectory {info} onclick={onEntryClick} onOpenMenuClick={onEntryMenuClick} />
-    {/each}
-    {#each files as file}
-      {#if file.type === "file"}
-        <File info={file.info} onclick={onEntryClick} onOpenMenuClick={onEntryMenuClick} />
-      {:else}
-        <UploadingFile status={file.info} />
-      {/if}
-    {/each}
+{#if entries.length > 0}
+  <div class="pb-[4.5rem]">
+    <RowVirtualizer
+      count={entries.length}
+      itemHeight={(index) => 56 + (index + 1 < entries.length ? 4 : 0)}
+    >
+      {#snippet item(index)}
+        {@const entry = entries[index]!}
+        <div class={index + 1 < entries.length ? "pb-1" : ""}>
+          {#if entry.type === "parent"}
+            <ActionEntryButton class="h-14" onclick={onParentClick}>
+              <DirectoryEntryLabel type="parent-directory" name=".." />
+            </ActionEntryButton>
+          {:else if entry.type === "directory"}
+            <SubDirectory
+              info={entry.details}
+              onclick={onEntryClick}
+              onOpenMenuClick={onEntryMenuClick}
+            />
+          {:else if entry.type === "file"}
+            <File info={entry.details} onclick={onEntryClick} onOpenMenuClick={onEntryMenuClick} />
+          {:else}
+            <UploadingFile state={entry.details} />
+          {/if}
+        </div>
+      {/snippet}
+    </RowVirtualizer>
   </div>
 {:else}
   <div class="flex flex-grow items-center justify-center">

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

@@ -1,66 +1,52 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
+  import { browser } from "$app/environment";
   import { ActionEntryButton } from "$lib/components/atoms";
   import { DirectoryEntryLabel } from "$lib/components/molecules";
-  import type { FileInfo } from "$lib/modules/filesystem";
+  import type { SummarizedFileInfo } from "$lib/modules/filesystem2.svelte";
+  import { requestFileThumbnailDownload } from "$lib/services/file";
   import { formatDateTime } from "$lib/utils";
-  import { requestFileThumbnailDownload } from "./service";
   import type { SelectedEntry } from "../service.svelte";
 
   import IconMoreVert from "~icons/material-symbols/more-vert";
 
   interface Props {
-    info: Writable<FileInfo | null>;
-    onclick: (selectedEntry: SelectedEntry) => void;
-    onOpenMenuClick: (selectedEntry: SelectedEntry) => void;
+    info: SummarizedFileInfo;
+    onclick: (entry: SelectedEntry) => void;
+    onOpenMenuClick: (entry: SelectedEntry) => void;
   }
 
   let { info, onclick, onOpenMenuClick }: Props = $props();
 
-  let thumbnail: string | undefined = $state();
+  let showThumbnail = $derived(
+    browser && (info.contentType.startsWith("image/") || info.contentType.startsWith("video/")),
+  );
+  let thumbnailPromise = $derived(
+    showThumbnail ? requestFileThumbnailDownload(info.id, info.dataKey?.key) : null,
+  );
 
-  const openFile = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info!;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onclick({ type: "file", id, dataKey, dataKeyVersion, name });
+  const action = (callback: typeof onclick) => {
+    callback({ type: "file", id: info.id, dataKey: info.dataKey, name: info.name });
   };
-
-  const openMenu = () => {
-    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)
-        .then((thumbnailUrl) => {
-          thumbnail = thumbnailUrl ?? undefined;
-        })
-        .catch(() => {
-          // TODO: Error Handling
-          thumbnail = undefined;
-        });
-    } else {
-      thumbnail = undefined;
-    }
-  });
 </script>
 
-{#if $info}
-  <ActionEntryButton
-    class="h-14"
-    onclick={openFile}
-    actionButtonIcon={IconMoreVert}
-    onActionButtonClick={openMenu}
-  >
+<ActionEntryButton
+  class="h-14"
+  onclick={() => action(onclick)}
+  actionButtonIcon={IconMoreVert}
+  onActionButtonClick={() => action(onOpenMenuClick)}
+>
+  {#await thumbnailPromise}
     <DirectoryEntryLabel
       type="file"
-      {thumbnail}
-      name={$info.name}
-      subtext={formatDateTime($info.createdAt ?? $info.lastModifiedAt)}
+      name={info.name}
+      subtext={formatDateTime(info.createdAt ?? info.lastModifiedAt)}
     />
-  </ActionEntryButton>
-{/if}
+  {:then thumbnail}
+    <DirectoryEntryLabel
+      type="file"
+      thumbnail={thumbnail ?? undefined}
+      name={info.name}
+      subtext={formatDateTime(info.createdAt ?? info.lastModifiedAt)}
+    />
+  {/await}
+</ActionEntryButton>

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

@@ -1,44 +1,29 @@
 <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.svelte";
   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>;
-    onclick: (selectedEntry: SelectedEntry) => void;
-    onOpenMenuClick: (selectedEntry: SelectedEntry) => void;
+    info: SubDirectoryInfo;
+    onclick: (entry: SelectedEntry) => void;
+    onOpenMenuClick: (entry: SelectedEntry) => void;
   }
 
   let { info, onclick, onOpenMenuClick }: Props = $props();
 
-  const openDirectory = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as SubDirectoryInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onclick({ type: "directory", id, dataKey, dataKeyVersion, name });
-  };
-
-  const openMenu = () => {
-    const { id, dataKey, dataKeyVersion, name } = $info as SubDirectoryInfo;
-    if (!dataKey || !dataKeyVersion) return; // TODO: Error handling
-
-    onOpenMenuClick({ type: "directory", id, dataKey, dataKeyVersion, name });
+  const action = (callback: typeof onclick) => {
+    callback({ type: "directory", id: info.id, dataKey: info.dataKey, name: info.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={() => action(onclick)}
+  actionButtonIcon={IconMoreVert}
+  onActionButtonClick={() => action(onOpenMenuClick)}
+>
+  <DirectoryEntryLabel type="directory" name={info.name} />
+</ActionEntryButton>

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

@@ -1,38 +1,35 @@
 <script lang="ts">
-  import type { Writable } from "svelte/store";
-  import { isFileUploading, type FileUploadStatus } from "$lib/stores";
+  import type { LiveFileUploadState } from "$lib/modules/file";
   import { formatNetworkSpeed } from "$lib/utils";
 
   import IconDraft from "~icons/material-symbols/draft";
 
   interface Props {
-    status: Writable<FileUploadStatus>;
+    state: LiveFileUploadState;
   }
 
-  let { status }: Props = $props();
+  let { state }: Props = $props();
 </script>
 
-{#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>
-      <p class="text-xs">
-        {#if $status.status === "encryption-pending"}
-          준비 중
-        {:else if $status.status === "encrypting"}
-          암호화하는 중
-        {: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)}
-        {/if}
-      </p>
-    </div>
+<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>
-{/if}
+  <div class="flex flex-grow flex-col overflow-hidden text-gray-800">
+    <p title={state.name} class="truncate font-medium">
+      {state.name}
+    </p>
+    <p class="text-xs">
+      {#if state.status === "encryption-pending"}
+        준비 중
+      {:else if state.status === "encrypting"}
+        암호화하는 중
+      {:else if state.status === "upload-pending"}
+        업로드를 기다리는 중
+      {:else if state.status === "uploading"}
+        전송됨 {Math.floor((state.progress ?? 0) * 100)}% ·
+        {formatNetworkSpeed((state.rate ?? 0) * 8)}
+      {/if}
+    </p>
+  </div>
+</div>

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

@@ -1 +0,0 @@
-export { requestFileThumbnailDownload } from "$lib/services/file";

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

@@ -1,7 +1,5 @@
 <script lang="ts">
-  import { untrack } from "svelte";
-  import { get, type Writable } from "svelte/store";
-  import { fileUploadStatusStore, isFileUploading, type FileUploadStatus } from "$lib/stores";
+  import { getUploadingFiles } from "$lib/modules/file";
 
   interface Props {
     onclick: () => void;
@@ -9,21 +7,7 @@
 
   let { onclick }: Props = $props();
 
-  let uploadingFiles: Writable<FileUploadStatus>[] = $state([]);
-
-  $effect(() => {
-    uploadingFiles = $fileUploadStatusStore.filter((status) => isFileUploading(get(status).status));
-    return untrack(() => {
-      const unsubscribes = uploadingFiles.map((uploadingFile) =>
-        uploadingFile.subscribe(({ status }) => {
-          if (!isFileUploading(status)) {
-            uploadingFiles = uploadingFiles.filter((file) => file !== uploadingFile);
-          }
-        }),
-      );
-      return () => unsubscribes.forEach((unsubscribe) => unsubscribe());
-    });
-  });
+  let uploadingFiles = $derived(getUploadingFiles());
 </script>
 
 {#if uploadingFiles.length > 0}

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

@@ -14,8 +14,7 @@ import { trpc } from "$trpc/client";
 export interface SelectedEntry {
   type: "directory" | "file";
   id: number;
-  dataKey: CryptoKey;
-  dataKeyVersion: Date;
+  dataKey: { key: CryptoKey; version: Date } | undefined;
   name: string;
 }
 
@@ -97,20 +96,25 @@ export const requestFileUpload = async (
 };
 
 export const requestEntryRename = async (entry: SelectedEntry, newName: string) => {
-  const newNameEncrypted = await encryptString(newName, entry.dataKey);
+  if (!entry.dataKey) {
+    // TODO: Error Handling
+    return false;
+  }
+
+  const newNameEncrypted = await encryptString(newName, entry.dataKey.key);
 
   try {
     if (entry.type === "directory") {
       await trpc().directory.rename.mutate({
         id: entry.id,
-        dekVersion: entry.dataKeyVersion,
+        dekVersion: entry.dataKey.version,
         name: newNameEncrypted.ciphertext,
         nameIv: newNameEncrypted.iv,
       });
     } else {
       await trpc().file.rename.mutate({
         id: entry.id,
-        dekVersion: entry.dataKeyVersion,
+        dekVersion: entry.dataKey.version,
         name: newNameEncrypted.ciphertext,
         nameIv: newNameEncrypted.iv,
       });

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

@@ -21,14 +21,16 @@
 
 <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="space-y-2 rounded-xl bg-white px-2 pb-4 pt-2">
+  <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>
-    <div class="grid grid-cols-4 gap-2 px-2">
-      {#each mediaFiles as file}
-        <FileThumbnailButton info={file} onclick={({ id }) => goto(`/file/${id}`)} />
-      {/each}
-    </div>
+    {#if mediaFiles.length > 0}
+      <div class="grid grid-cols-4 gap-2 p-2">
+        {#each mediaFiles as file}
+          <FileThumbnailButton info={file} onclick={({ id }) => goto(`/file/${id}`)} />
+        {/each}
+      </div>
+    {/if}
   </div>
 </div>

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

@@ -0,0 +1,7 @@
+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

@@ -1,7 +0,0 @@
-import { trpc } from "$trpc/client";
-import type { PageLoad } from "./$types";
-
-export const load: PageLoad = async ({ fetch }) => {
-  const { nickname } = await trpc(fetch).user.get.query();
-  return { nickname };
-};

src/routes/+layout.svelte

@@ -2,10 +2,9 @@
   import { onMount } from "svelte";
   import { get } from "svelte/store";
   import { goto as svelteGoto } from "$app/navigation";
+  import { getUploadingFiles } from "$lib/modules/file";
   import {
-    fileUploadStatusStore,
     fileDownloadStatusStore,
-    isFileUploading,
     isFileDownloading,
     clientKeyStore,
     masterKeyStore,
@@ -16,7 +15,7 @@
 
   const protectFileUploadAndDownload = (e: BeforeUnloadEvent) => {
     if (
-      $fileUploadStatusStore.some((status) => isFileUploading(get(status).status)) ||
+      getUploadingFiles().length > 0 ||
       $fileDownloadStatusStore.some((status) => isFileDownloading(get(status).status))
     ) {
       e.preventDefault();

src/trpc/client.ts

@@ -1,4 +1,4 @@
-import { createTRPCClient, httpBatchLink } from "@trpc/client";
+import { createTRPCClient, httpBatchLink, TRPCClientError } from "@trpc/client";
 import superjson from "superjson";
 import { browser } from "$app/environment";
 import type { AppRouter } from "./router.server";
@@ -24,3 +24,7 @@ export const trpc = (fetch = globalThis.fetch) => {
   }
   return client;
 };
+
+export const isTRPCClientError = (e: unknown): e is TRPCClientError<AppRouter> => {
+  return e instanceof TRPCClientError;
+};

src/trpc/routers/category.ts

@@ -9,6 +9,7 @@ const categoryRouter = router({
     .input(
       z.object({
         id: categoryIdSchema,
+        recurse: z.boolean().default(false),
       }),
     )
     .query(async ({ ctx, input }) => {
@@ -20,7 +21,12 @@ const categoryRouter = router({
         throw new TRPCError({ code: "NOT_FOUND", message: "Invalid category id" });
       }
 
-      const categories = await CategoryRepo.getAllCategoriesByParent(ctx.session.userId, input.id);
+      const [categories, files] = await Promise.all([
+        CategoryRepo.getAllCategoriesByParent(ctx.session.userId, input.id),
+        input.id !== "root"
+          ? FileRepo.getAllFilesByCategory(ctx.session.userId, input.id, input.recurse)
+          : undefined,
+      ]);
       return {
         metadata: category && {
           parent: category.parentId,
@@ -30,7 +36,28 @@ const categoryRouter = router({
           name: category.encName.ciphertext,
           nameIv: category.encName.iv,
         },
-        subCategories: categories.map(({ id }) => id),
+        subCategories: categories.map((category) => ({
+          id: category.id,
+          mekVersion: category.mekVersion,
+          dek: category.encDek,
+          dekVersion: category.dekVersion,
+          name: category.encName.ciphertext,
+          nameIv: category.encName.iv,
+        })),
+        files: files?.map((file) => ({
+          id: file.id,
+          mekVersion: file.mekVersion,
+          dek: file.encDek,
+          dekVersion: file.dekVersion,
+          contentType: file.contentType,
+          name: file.encName.ciphertext,
+          nameIv: file.encName.iv,
+          createdAt: file.encCreatedAt?.ciphertext,
+          createdAtIv: file.encCreatedAt?.iv,
+          lastModifiedAt: file.encLastModifiedAt.ciphertext,
+          lastModifiedAtIv: file.encLastModifiedAt.iv,
+          isRecursive: file.isRecursive,
+        })),
       };
     }),
 
@@ -113,27 +140,6 @@ const categoryRouter = router({
       }
     }),
 
-  files: roleProcedure["activeClient"]
-    .input(
-      z.object({
-        id: z.int().positive(),
-        recurse: z.boolean().default(false),
-      }),
-    )
-    .query(async ({ ctx, input }) => {
-      const category = await CategoryRepo.getCategory(ctx.session.userId, input.id);
-      if (!category) {
-        throw new TRPCError({ code: "NOT_FOUND", message: "Invalid category id" });
-      }
-
-      const files = await FileRepo.getAllFilesByCategory(
-        ctx.session.userId,
-        input.id,
-        input.recurse,
-      );
-      return files.map(({ id, isRecursive }) => ({ file: id, isRecursive }));
-    }),
-
   addFile: roleProcedure["activeClient"]
     .input(
       z.object({

src/trpc/routers/directory.ts

@@ -32,8 +32,27 @@ const directoryRouter = router({
           name: directory.encName.ciphertext,
           nameIv: directory.encName.iv,
         },
-        subDirectories: directories.map(({ id }) => id),
-        files: files.map(({ id }) => id),
+        subDirectories: directories.map((directory) => ({
+          id: directory.id,
+          mekVersion: directory.mekVersion,
+          dek: directory.encDek,
+          dekVersion: directory.dekVersion,
+          name: directory.encName.ciphertext,
+          nameIv: directory.encName.iv,
+        })),
+        files: files.map((file) => ({
+          id: file.id,
+          mekVersion: file.mekVersion,
+          dek: file.encDek,
+          dekVersion: file.dekVersion,
+          contentType: file.contentType,
+          name: file.encName.ciphertext,
+          nameIv: file.encName.iv,
+          createdAt: file.encCreatedAt?.ciphertext,
+          createdAtIv: file.encCreatedAt?.iv,
+          lastModifiedAt: file.encLastModifiedAt.ciphertext,
+          lastModifiedAtIv: file.encLastModifiedAt.iv,
+        })),
       };
     }),