initial vibecoded release

lib/viewmodels/note_view_model.dart

@@ -0,0 +1,93 @@
+import 'package:flutter/foundation.dart';
+
+import '../models/note.dart';
+import '../services/note_service.dart';
+
+enum BackupStatus { idle, loading, success, error }
+
+class NoteViewModel extends ChangeNotifier {
+  final NoteService _service;
+
+  NoteViewModel({required NoteService service}) : _service = service;
+
+  List<Note> _notes = [];
+  bool _isLoading = false;
+  String? _error;
+  BackupStatus _backupStatus = BackupStatus.idle;
+
+  // ── Getters ────────────────────────────────────────────────
+  List<Note> get notes => _notes;
+  bool get isLoading => _isLoading;
+  String? get error => _error;
+  BackupStatus get backupStatus => _backupStatus;
+
+  // ── Notes CRUD ─────────────────────────────────────────────
+  Future<void> loadNotes() async {
+    _setLoading(true);
+    try {
+      _notes = await _service.getAllNotes();
+      _error = null;
+    } catch (e) {
+      _error = 'Failed to load notes: $e';
+    } finally {
+      _setLoading(false);
+    }
+  }
+
+  Future<Note> createNote() async {
+    final note = await _service.createNote();
+    _notes.insert(0, note);
+    notifyListeners();
+    return note;
+  }
+
+  Future<void> updateNote(Note note) async {
+    final updated = await _service.updateNote(note);
+    final index = _notes.indexWhere((n) => n.id == updated.id);
+    if (index != -1) {
+      _notes[index] = updated;
+      notifyListeners();
+    }
+  }
+
+  Future<void> deleteNote(String id) async {
+    await _service.deleteNote(id);
+    _notes.removeWhere((n) => n.id == id);
+    notifyListeners();
+  }
+
+  // ── Backup ─────────────────────────────────────────────────
+  Future<void> backup() async {
+    _setBackupStatus(BackupStatus.loading);
+    try {
+      await _service.triggerBackup();
+      _setBackupStatus(BackupStatus.success);
+    } catch (e) {
+      _error = e.toString();
+      _setBackupStatus(BackupStatus.error);
+    }
+  }
+
+  Future<void> restore() async {
+    _setBackupStatus(BackupStatus.loading);
+    try {
+      await _service.triggerRestore();
+      await loadNotes();
+      _setBackupStatus(BackupStatus.success);
+    } catch (e) {
+      _error = e.toString();
+      _setBackupStatus(BackupStatus.error);
+    }
+  }
+
+  // ── Helpers ────────────────────────────────────────────────
+  void _setLoading(bool value) {
+    _isLoading = value;
+    notifyListeners();
+  }
+
+  void _setBackupStatus(BackupStatus status) {
+    _backupStatus = status;
+    notifyListeners();
+  }
+}