Frontend first draft

frontend/pweb/lib/providers/payment_methods.dart

@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+
+import 'package:pshared/models/payment/methods/type.dart';
+
+import 'package:pweb/services/payments/payment_methods.dart';
+
+
+class PaymentMethodsProvider extends ChangeNotifier {
+  final PaymentMethodsService service;
+
+  List<PaymentMethod> _methods = [];
+  PaymentMethod? _selectedMethod;
+  bool _isLoading = false;
+  String? _error;
+
+  PaymentMethodsProvider({required this.service});
+
+  List<PaymentMethod> get methods => _methods;
+  PaymentMethod? get selectedMethod => _selectedMethod;
+  bool get isLoading => _isLoading;
+  String? get error => _error;
+
+  Future<void> loadMethods() async {
+    _isLoading = true;
+    _error = null;
+    notifyListeners();
+
+    try {
+      _methods = await service.fetchMethods();
+      _selectedMethod = _methods.firstWhere((m) => m.isMain, orElse: () => _methods.first);
+    } catch (e) {
+      _error = e.toString();
+    }
+
+    _isLoading = false;
+    notifyListeners();
+  }
+
+  void selectMethod(PaymentMethod method) {
+    _selectedMethod = method;
+    notifyListeners();
+  }
+
+  void deleteMethod(PaymentMethod method) {
+    _methods.remove(method);
+    notifyListeners();
+  }
+
+  void reorderMethods(int oldIndex, int newIndex) {
+    if (newIndex > oldIndex) newIndex--;
+    final item = _methods.removeAt(oldIndex);
+    _methods.insert(newIndex, item);
+    notifyListeners();
+  }
+
+  void toggleEnabled(PaymentMethod method, bool value) {
+    method.isEnabled = value;
+    notifyListeners();
+  }
+
+  void makeMain(PaymentMethod method) {
+    for (final m in _methods) m.isMain = false;
+    method.isMain = true;
+    selectMethod(method);
+  }
+}