packages/go_router/lib/src/pages/cupertino.dart

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// ignore_for_file: diagnostic_describe_all_properties

import 'package:flutter/cupertino.dart';
import '../misc/extensions.dart';

/// Checks for CupertinoApp in the widget tree.
bool isCupertinoApp(Element elem) =>
    elem.findAncestorWidgetOfExactType<CupertinoApp>() != null;

/// Builds a Cupertino page.
CupertinoPage<void> pageBuilderForCupertinoApp({
  required LocalKey key,
  required String? name,
  required Object? arguments,
  required String restorationId,
  required Widget child,
}) =>
    CupertinoPage<void>(
      name: name,
      arguments: arguments,
      key: key,
      restorationId: restorationId,
      child: child,
    );

/// Default error page implementation for Cupertino.
class CupertinoErrorScreen extends StatelessWidget {
  /// Provide an exception to this page for it to be displayed.
  const CupertinoErrorScreen(this.error, {super.key});

  /// The exception to be displayed.
  final Exception? error;

  @override
  Widget build(BuildContext context) => CupertinoPageScaffold(
        navigationBar:
            const CupertinoNavigationBar(middle: Text('Page Not Found')),
        child: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(error?.toString() ?? 'page not found'),
              CupertinoButton(
                onPressed: () => context.go('/'),
                child: const Text('Home'),
              ),
            ],
          ),
        ),
      );
}