add import export and items

2026-10-28 08:10:55 +01:00
parent 07a1bb02fd
commit 4a1731f986
22 changed files with 1118 additions and 106 deletions
@@ -0,0 +1,24 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:file_picker/file_picker.dart';
+
+class BackupFileService {
+  Future<bool> save(String json, String name) async =>
+      await FilePicker.saveFile(
+        dialogTitle: 'Datensicherung speichern',
+        fileName: name,
+        bytes: Uint8List.fromList(utf8.encode(json)),
+      ) !=
+      null;
+
+  Future<String?> open() async {
+    final file = await FilePicker.pickFile(
+      dialogTitle: 'Datensicherung auswählen',
+      type: FileType.custom,
+      allowedExtensions: ['json'],
+    );
+    if (file == null) return null;
+    return utf8.decode(await file.readAsBytes());
+  }
+}