Type directory picker without DOM FileSystemDirectoryHandle.entries.

periscope/src/frontend/src/components/upload/file-upload-zone.tsx

@@ -94,23 +94,20 @@ function mergeSelection(current: File[], incoming: File[], multiple: boolean, di
   return [...current, ...incoming];
 }
 
-async function filesFromDirectoryHandle(
-  handle: FileSystemDirectoryHandle,
-  prefix = "",
-): Promise<File[]> {
+type DirHandle = {
+  name: string;
+  entries: () => AsyncIterable<[string, { kind: string; getFile?: () => Promise<File> } & DirHandle]>;
+};
+
+async function filesFromDirectoryHandle(handle: DirHandle, prefix = ""): Promise<File[]> {
   const out: File[] = [];
   for await (const [name, child] of handle.entries()) {
     if (SKIP_DIR.test(name)) continue;
-    if (child.kind === "file") {
+    if (child.kind === "file" && child.getFile) {
       const file = await child.getFile();
       out.push(stampRelativePath(file, prefix + name));
     } else if (child.kind === "directory") {
-      out.push(
-        ...(await filesFromDirectoryHandle(
-          child as FileSystemDirectoryHandle,
-          prefix + name + "/",
-        )),
-      );
+      out.push(...(await filesFromDirectoryHandle(child, prefix + name + "/")));
     }
   }
   return out;
@@ -137,9 +134,7 @@ function pickFolderViaHiddenInput(): Promise<File[]> {
 
 async function pickProjectFolder(): Promise<File[]> {
   const picker = (
-    window as Window & {
-      showDirectoryPicker?: () => Promise<FileSystemDirectoryHandle>;
-    }
+    window as Window & { showDirectoryPicker?: () => Promise<DirHandle> }
   ).showDirectoryPicker;
   if (typeof picker === "function") {
     try {