pointer

src/features/local/utils/directoriesRouter.ts

@@ -25,4 +25,13 @@ export const directoriesRouter = router({
     .query(async ({ input: { folderPath } }) => {
       return await fileStorageService.settings.folderIsCourse(folderPath);
     }),
+  directoryExists: publicProcedure
+    .input(
+      z.object({
+        relativePath: z.string(),
+      })
+    )
+    .query(async ({ input: { relativePath } }) => {
+      return await fileStorageService.directoryExists(relativePath);
+    }),
 });

src/features/local/utils/fileStorageService.ts

@@ -72,4 +72,15 @@ export const fileStorageService = {
     }
     return { files, folders };
   },
+
+  async directoryExists(relativePath: string): Promise<boolean> {
+    const fullPath = path.join(basePath, relativePath);
+    // Security: ensure fullPath is inside basePath
+    const resolvedBase = path.resolve(basePath);
+    const resolvedFull = path.resolve(fullPath);
+    if (!resolvedFull.startsWith(resolvedBase)) {
+      return false;
+    }
+    return await directoryOrFileExists(fullPath);
+  },
 };

src/features/local/utils/storageDirectoryHooks.ts

@@ -23,3 +23,10 @@ export const useDirectoryIsCourseQuery = (folderPath: string) => {
     trpc.directories.directoryIsCourse.queryOptions({ folderPath })
   );
 };
+
+export const useDirectoryExistsQuery = (relativePath: string) => {
+  const trpc = useTRPC();
+  return useQuery(
+    trpc.directories.directoryExists.queryOptions({ relativePath })
+  );
+};