feat(android): back up the files of folders the person chooses

A Files section takes folders through the system picker (no storage
permission), refuses DCIM, Pictures and Movies, skips what the photo backup
sends, and runs on the photo backup's own runner into <folder>/<account>-drive.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/drive-sync.js b/packages/meshbay-hub/src/meshbay_hub/static/drive-sync.js
new file mode 100644
index 0000000..5ddf188
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/static/drive-sync.js
@@ -0,0 +1,29 @@
+// Files backup: the folders the person chose through the system's picker,
+// sent into `<folder>/<account>-drive/<chosen folder>/…` of the destination
+// every backup shares (sync-destination.js), once a day, on an unmetered
+// network, like photos (docs/MESHBAY_DESIGN.md §9.13).
+//
+// The phone (platform.driveSync) lists the files, leaves out what the photo
+// backup sends, keeps the ledger and hands each file over a range at a time;
+// the running is the photo backup's own (createBackup). Additive by
+// construction: a new version of a file goes beside the one sent, and nothing
+// here deletes, renames or replaces anything on the node.
+
+import * as platform from './platform.js';
+import { t } from './i18n.js';
+import { createBackup } from './photo-sync.js';
+import { LASTING, failureText } from './phone-sync.js';
+
+const drive = createBackup({
+  name: 'files',
+  sync: platform.driveSync,
+  configured: (status) => Boolean(status.on) && (status.folders || []).length > 0,
+  progress: 'drivesync.notif_progress',
+  failures: LASTING,
+  say: (code) => t('phonesync.notice', { what: t('drivesync.heading'), reason: failureText(code) }),
+});
+
+export const startDriveSync = (context) => drive.start(context);
+export const stopDriveSync = () => drive.stop();
+export const runDriveSync = (opts) => drive.run(opts);
+export const subscribe = (fn) => drive.subscribe(fn);