packages/go_router/example/lib/books/src/screens/book_details.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.

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:url_launcher/link.dart';

import '../data.dart';
import 'author_details.dart';

/// A screen to display book details.
class BookDetailsScreen extends StatelessWidget {
  /// Creates a [BookDetailsScreen].
  const BookDetailsScreen({
    Key? key,
    this.book,
  }) : super(key: key);

  /// The book to be displayed.
  final Book? book;

  @override
  Widget build(BuildContext context) {
    if (book == null) {
      return const Scaffold(
        body: Center(
          child: Text('No book found.'),
        ),
      );
    }
    return Scaffold(
      appBar: AppBar(
        title: Text(book!.title),
      ),
      body: Center(
        child: Column(
          children: <Widget>[
            Text(
              book!.title,
              style: Theme.of(context).textTheme.headlineMedium,
            ),
            Text(
              book!.author.name,
              style: Theme.of(context).textTheme.titleMedium,
            ),
            TextButton(
              onPressed: () {
                Navigator.of(context).push<void>(
                  MaterialPageRoute<void>(
                    builder: (BuildContext context) =>
                        AuthorDetailsScreen(author: book!.author),
                  ),
                );
              },
              child: const Text('View author (navigator.push)'),
            ),
            Link(
              uri: Uri.parse('/author/${book!.author.id}'),
              builder: (BuildContext context, FollowLink? followLink) =>
                  TextButton(
                onPressed: followLink,
                child: const Text('View author (Link)'),
              ),
            ),
            TextButton(
              onPressed: () {
                context.push('/author/${book!.author.id}');
              },
              child: const Text('View author (GoRouter.push)'),
            ),
          ],
        ),
      ),
    );
  }
}