tweaks

Signed-off-by: dom <githubaccount56556@proton.me>

lib/utils/storage_utils.dart

@@ -0,0 +1,34 @@
+import 'dart:io' show File;
+import 'dart:typed_data' show Uint8List;
+
+import 'package:PiliPlus/utils/platform_utils.dart';
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
+
+abstract final class StorageUtils {
+  static Future<void> saveBytes2File({
+    required String name,
+    required Uint8List bytes,
+    required List<String> allowedExtensions,
+    FileType type = FileType.custom,
+  }) async {
+    try {
+      final path = await FilePicker.saveFile(
+        allowedExtensions: allowedExtensions,
+        type: type,
+        fileName: name,
+        bytes: PlatformUtils.isDesktop ? null : bytes,
+      );
+      if (path == null) {
+        SmartDialog.showToast("取消保存");
+        return;
+      }
+      if (PlatformUtils.isDesktop) {
+        await File(path).writeAsBytes(bytes);
+      }
+      SmartDialog.showToast("已保存");
+    } catch (e) {
+      SmartDialog.showToast("保存失败: $e");
+    }
+  }
+}