불필요하게 분리된 컴포넌트 삭제

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

@@ -1,15 +1,53 @@
 <script lang="ts">
   import { onMount } from "svelte";
   import { goto } from "$app/navigation";
-  import { FullscreenDiv } from "$lib/components/atoms";
+  import { FileThumbnailButton, FullscreenDiv, RowVirtualizer } from "$lib/components/atoms";
   import { TopBar } from "$lib/components/molecules";
-  import { Gallery } from "$lib/components/organisms";
-  import { bulkGetFileInfo, type MaybeFileInfo } from "$lib/modules/filesystem";
+  import {
+    bulkGetFileInfo,
+    type MaybeFileInfo,
+    type SummarizedFileInfo,
+  } from "$lib/modules/filesystem";
   import { masterKeyStore } from "$lib/stores";
+  import { formatDate, formatDateSortable, SortBy, sortEntries } from "$lib/utils";
 
   let { data } = $props();
 
+  type Row =
+    | { type: "header"; label: string }
+    | { type: "items"; files: SummarizedFileInfo[]; isLast: boolean };
+
   let files: MaybeFileInfo[] = $state([]);
+  let rows: Row[] = $derived.by(() => {
+    const groups = Map.groupBy(
+      files
+        .filter((file) => file.exists)
+        .filter(
+          (file) => file.contentType.startsWith("image/") || file.contentType.startsWith("video/"),
+        ),
+      (file) => formatDateSortable(file.createdAt ?? file.lastModifiedAt),
+    );
+    return Array.from(groups.entries())
+      .sort(([dateA], [dateB]) => dateB.localeCompare(dateA))
+      .flatMap(([, entries]) => {
+        const sortedEntries = sortEntries([...entries], SortBy.DATE_DESC);
+        return [
+          {
+            type: "header",
+            label: formatDate(sortedEntries[0]!.createdAt ?? sortedEntries[0]!.lastModifiedAt),
+          },
+          ...Array.from({ length: Math.ceil(sortedEntries.length / 4) }, (_, i) => {
+            const start = i * 4;
+            const end = start + 4;
+            return {
+              type: "items" as const,
+              files: sortedEntries.slice(start, end),
+              isLast: end >= sortedEntries.length,
+            };
+          }),
+        ];
+      });
+  });
 
   onMount(async () => {
     files = Array.from((await bulkGetFileInfo(data.files, $masterKeyStore?.get(1)?.key!)).values());
@@ -22,8 +60,37 @@
 
 <TopBar title="사진 및 동영상" />
 <FullscreenDiv>
-  <Gallery
-    files={files.filter((file) => file?.exists)}
-    onFileClick={({ id }) => goto(`/file/${id}?from=gallery`)}
-  />
+  <RowVirtualizer
+    count={rows.length}
+    itemHeight={(index) =>
+      rows[index]!.type === "header" ? 28 : 181 + (rows[index]!.isLast ? 16 : 4)}
+    class="flex flex-grow flex-col"
+  >
+    {#snippet item(index)}
+      {@const row = rows[index]!}
+      {#if row.type === "header"}
+        <p class="pb-2 text-sm font-medium">{row.label}</p>
+      {:else}
+        <div class={["grid grid-cols-4 gap-x-1", row.isLast ? "pb-4" : "pb-1"]}>
+          {#each row.files as file (file.id)}
+            <FileThumbnailButton
+              info={file}
+              onclick={() => goto(`/file/${file.id}?from=gallery`)}
+            />
+          {/each}
+        </div>
+      {/if}
+    {/snippet}
+    {#snippet placeholder()}
+      <div class="flex h-full flex-grow items-center justify-center">
+        <p class="text-gray-500">
+          {#if files.length === 0}
+            업로드된 파일이 없어요.
+          {:else}
+            사진 또는 동영상이 없어요.
+          {/if}
+        </p>
+      </div>
+    {/snippet}
+  </RowVirtualizer>
 </FullscreenDiv>