1 files changed, 23 insertions, 4 deletions
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/platform.js b/packages/meshbay-hub/src/meshbay_hub/static/platform.js
index 994f558..372b666 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/platform.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/platform.js
@@ -176,13 +176,32 @@ export async function apiFetch(url, init) {
  * in `downloads.js`. Adding a native writer must not remove the three that
  * already work.
  */
-export async function nativeSave(suggestedName, size) {
+export async function nativeSave(suggestedName, { auto = true } = {}) {
   if (!bridge || !bridge.saveFile) return null;
-  return bridge.saveFile(suggestedName, size);
+  const sink = await bridge.saveFile(suggestedName, { auto });
+  if (!sink) return null;
+  // The shape every caller already expects from a download target: a `writable`
+  // with write/close/abort, and the name it was actually given on disk.
+  return {
+    name: sink.name,
+    writable: {
+      write: (bytes) => sink.write(bytes),
+      close: () => sink.close(),
+      abort: () => sink.abort(),
+    },
+  };
 }
 
+/** Where downloads go on a desktop build. Null in a browser. */
+export const folder = {
+  available: Boolean(bridge && bridge.folder),
+  async choose() { return bridge && bridge.folder ? bridge.folder.choose() : null; },
+  async get() { return bridge && bridge.folder ? bridge.folder.get() : null; },
+  async forget() { return bridge && bridge.folder ? bridge.folder.forget() : false; },
+};
+
 export default { isNative, hubBase, capabilities, secrets, nativeSave,
-                 apiFetch, device, bridgeMessage };
+                 apiFetch, device, bridgeMessage, folder };
 
 // Also a global, because `transport.js` is loaded as a classic script — it
 // predates the module graph and exposes `MeshBayTransport` the same way. The
@@ -191,5 +210,5 @@ export default { isNative, hubBase, capabilities, secrets, nativeSave,
 if (typeof window !== 'undefined') {
   window.MeshBayPlatform = { isNative, hubBase, capabilities, secrets,
                              nativeSave, apiFetch, device,
-                             bridgeMessage };
+                             bridgeMessage, folder };
 }