캐시 삭제 구현

src/lib/modules/cache.ts

@@ -1,9 +1,10 @@
 import {
   getFileCacheIndex as getFileCacheIndexFromIndexedDB,
-  storeFileCacheIndex as storeFileCacheIndexToIndexedDB,
+  storeFileCacheIndex,
+  deleteFileCacheIndex,
   type FileCacheIndex,
 } from "$lib/indexedDB";
-import { readFileFromOpfs, writeFileToOpfs } from "$lib/modules/opfs";
+import { readFile, writeFile, deleteFile } from "$lib/modules/opfs";
 
 const fileCacheIndex = new Map<number, FileCacheIndex>();
 
@@ -22,13 +23,13 @@ export const getFileCache = async (fileId: number) => {
   if (!cacheIndex) return null;
 
   cacheIndex.lastRetrievedAt = new Date();
-  storeFileCacheIndexToIndexedDB(cacheIndex); // Intended
-  return await readFileFromOpfs(`/cache/${fileId}`);
+  storeFileCacheIndex(cacheIndex); // Intended
+  return await readFile(`/cache/${fileId}`);
 };
 
 export const storeFileCache = async (fileId: number, fileBuffer: ArrayBuffer) => {
   const now = new Date();
-  await writeFileToOpfs(`/cache/${fileId}`, fileBuffer);
+  await writeFile(`/cache/${fileId}`, fileBuffer);
 
   const cacheIndex: FileCacheIndex = {
     fileId,
@@ -37,5 +38,11 @@ export const storeFileCache = async (fileId: number, fileBuffer: ArrayBuffer) =>
     size: fileBuffer.byteLength,
   };
   fileCacheIndex.set(fileId, cacheIndex);
-  await storeFileCacheIndexToIndexedDB(cacheIndex);
+  await storeFileCacheIndex(cacheIndex);
+};
+
+export const deleteFileCache = async (fileId: number) => {
+  await deleteFile(`/cache/${fileId}`);
+  fileCacheIndex.delete(fileId);
+  await deleteFileCacheIndex(fileId);
 };

src/lib/modules/opfs.ts

@@ -18,31 +18,32 @@ const getFileHandle = async (path: string, create = true) => {
 
   try {
     let directoryHandle: FileSystemDirectoryHandle = rootHandle;
-
     for (const part of parts.slice(0, -1)) {
       if (!part) continue;
       directoryHandle = await directoryHandle.getDirectoryHandle(part, { create });
     }
 
-    return directoryHandle.getFileHandle(parts[parts.length - 1]!, { create });
+    const filename = parts[parts.length - 1]!;
+    const fileHandle = await directoryHandle.getFileHandle(filename, { create });
+    return { parentHandle: directoryHandle, filename, fileHandle };
   } catch (e) {
     if (e instanceof DOMException && e.name === "NotFoundError") {
-      return null;
+      return {};
     }
     throw e;
   }
 };
 
-export const readFileFromOpfs = async (path: string) => {
-  const fileHandle = await getFileHandle(path, false);
+export const readFile = async (path: string) => {
+  const { fileHandle } = await getFileHandle(path, false);
   if (!fileHandle) return null;
 
   const file = await fileHandle.getFile();
   return await file.arrayBuffer();
 };
 
-export const writeFileToOpfs = async (path: string, data: ArrayBuffer) => {
-  const fileHandle = await getFileHandle(path);
+export const writeFile = async (path: string, data: ArrayBuffer) => {
+  const { fileHandle } = await getFileHandle(path);
   const writable = await fileHandle!.createWritable();
 
   try {
@@ -51,3 +52,10 @@ export const writeFileToOpfs = async (path: string, data: ArrayBuffer) => {
     await writable.close();
   }
 };
+
+export const deleteFile = async (path: string) => {
+  const { parentHandle, filename } = await getFileHandle(path, false);
+  if (!parentHandle) return;
+
+  await parentHandle.removeEntry(filename);
+};