Initial commit

lib/pages/intro/flows/restore_backup_flow.dart

@@ -0,0 +1,38 @@
+// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
+// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'package:tatchat/utils/file_selector.dart';
+import 'package:tatchat/widgets/future_loading_dialog.dart';
+import 'package:tatchat/widgets/matrix.dart';
+import 'package:go_router/go_router.dart';
+import 'package:material_ui/material_ui.dart';
+
+Future<void> restoreBackupFlow(BuildContext context) async {
+  final matrix = Matrix.of(context);
+  final picked = await selectFiles(context);
+  final file = picked.firstOrNull;
+  if (file == null) return;
+
+  if (!context.mounted) return;
+  final result = await showFutureLoadingDialog(
+    context: context,
+    future: () async {
+      final client = await matrix.getLoginClient();
+      await client.database.importDump(
+        String.fromCharCodes(await file.readAsBytes()),
+      );
+      await client.init(
+        waitForFirstSync: false,
+        waitUntilLoadCompletedLoaded: false,
+      );
+      matrix.initMatrix();
+      return client.isLogged();
+    },
+  );
+
+  if (result.result == true && context.mounted) {
+    context.go('/rooms');
+  }
+}