blob: 1c1250701e6dcec2bb50811dee84bc8452d34a17 [file] [log] [blame]
// Copyright 2014 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 'dart:async';
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
typedef UpdateUrlFetcher = Future<String> Function();
class Updater extends StatefulWidget {
const Updater({ @required this.updateUrlFetcher, this.child, Key key })
: assert(updateUrlFetcher != null),
super(key: key);
final UpdateUrlFetcher updateUrlFetcher;
final Widget child;
@override
State createState() => UpdaterState();
}
class UpdaterState extends State<Updater> {
@override
void initState() {
super.initState();
_checkForUpdates();
}
static DateTime _lastUpdateCheck;
Future<void> _checkForUpdates() async {
// Only prompt once a day
if (_lastUpdateCheck != null &&
DateTime.now().difference(_lastUpdateCheck) < const Duration(days: 1)) {
return; // We already checked for updates recently
}
_lastUpdateCheck = DateTime.now();
final String updateUrl = await widget.updateUrlFetcher();
if (updateUrl != null) {
final bool wantsUpdate = await showDialog<bool>(context: context, builder: _buildDialog);
if (wantsUpdate != null && wantsUpdate)
launch(updateUrl);
}
}
Widget _buildDialog(BuildContext context) {
final ThemeData theme = Theme.of(context);
final TextStyle dialogTextStyle =
theme.textTheme.subtitle1.copyWith(color: theme.textTheme.caption.color);
return AlertDialog(
title: const Text('Update Flutter Gallery?'),
content: Text('A newer version is available.', style: dialogTextStyle),
actions: <Widget>[
FlatButton(
child: const Text('NO THANKS'),
onPressed: () {
Navigator.pop(context, false);
},
),
FlatButton(
child: const Text('UPDATE'),
onPressed: () {
Navigator.pop(context, true);
},
),
],
);
}
@override
Widget build(BuildContext context) => widget.child;
}