썸네일 표시 구현

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

@@ -0,0 +1,17 @@
+import { callGetApi } from "$lib/hooks";
+import { decryptData } from "$lib/modules/crypto";
+import type { FileThumbnailInfoResponse } from "$lib/server/schemas";
+
+export const getFileThumbnail = async (fileId: number, dataKey: CryptoKey) => {
+  let res = await callGetApi(`/api/file/${fileId}/thumbnail`);
+  if (!res.ok) return null;
+
+  const { contentIv: thumbnailEncryptedIv }: FileThumbnailInfoResponse = await res.json();
+
+  res = await callGetApi(`/api/file/${fileId}/thumbnail/download`);
+  if (!res.ok) return null;
+
+  const thumbnailEncrypted = await res.arrayBuffer();
+  const thumbnail = await decryptData(thumbnailEncrypted, thumbnailEncryptedIv, dataKey);
+  return thumbnail;
+};