freezer/lib/ui/updater.dart

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Dart
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import 'dart:io';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:freezer/api/cache.dart';
import 'package:freezer/api/download.dart';
import 'package:freezer/ui/elements.dart';
import 'package:freezer/translations.i18n.dart';
import 'package:freezer/ui/error.dart';
import 'package:http/http.dart' as http;
import 'package:open_file/open_file.dart';
import 'package:package_info/package_info.dart';
import 'package:path_provider/path_provider.dart';
import 'package:path/path.dart' as p;
import 'dart:convert';
class UpdaterScreen extends StatefulWidget {
@override
_UpdaterScreenState createState() => _UpdaterScreenState();
}
class _UpdaterScreenState extends State<UpdaterScreen> {
bool _loading = true;
bool _error = false;
FreezerVersions _versions;
String _current;
String _arch;
double _progress = 0.0;
bool _buttonEnabled = true;
Future _load() async {
//Load current version
PackageInfo info = await PackageInfo.fromPlatform();
setState(() => _current = info.version);
//Get architecture
_arch = await DownloadManager.platform.invokeMethod("arch");
if (_arch == 'armv8l')
_arch = 'arm32';
//Load from website
try {
FreezerVersions versions = await FreezerVersions.fetch();
setState(() {
_versions = versions;
_loading = false;
});
} catch (e, st) {
print(e + st);
_error = true;
_loading = false;
}
}
FreezerDownload get _versionDownload {
return _versions.versions[0].downloads.firstWhere((d) => d.version.toLowerCase().contains(_arch.toLowerCase()), orElse: () => null);
}
Future _download() async {
String url = _versionDownload.directUrl;
//Start request
http.Client client = new http.Client();
http.StreamedResponse res = await client.send(http.Request('GET', Uri.parse(url)));
int size = res.contentLength;
//Open file
String path = p.join((await getExternalStorageDirectory()).path, 'update.apk');
File file = File(path);
IOSink fileSink = file.openWrite();
//Update progress
Future.doWhile(() async {
int received = await file.length();
setState(() => _progress = received/size);
return received != size;
});
//Pipe
await res.stream.pipe(fileSink);
fileSink.close();
OpenFile.open(path);
setState(() => _buttonEnabled = true);
}
@override
void initState() {
_load();
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: FreezerAppBar('Updates'.i18n),
body: ListView(
children: [
if (_error)
ErrorScreen(),
if (_loading)
Padding(
padding: EdgeInsets.all(8.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [CircularProgressIndicator()],
),
),
if (!_error && !_loading && _versions.latest == _current)
Center(
child: Padding(
padding: EdgeInsets.all(8.0),
child: Text(
'You are running latest version!'.i18n,
style: TextStyle(
fontSize: 26.0
)
),
)
),
if (!_error && !_loading && _versions.latest != _current)
Column(
children: [
Text(
'New update available!'.i18n + ' ' + _versions.latest,
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold
),
),
Container(height: 8.0),
Text(
'Current version: ' + _current,
style: TextStyle(
fontSize: 14.0,
fontStyle: FontStyle.italic
),
),
Container(height: 8.0),
FreezerDivider(),
Container(height: 8.0),
Text(
'Changelog',
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold
),
),
Padding(
padding: EdgeInsets.fromLTRB(16, 4, 16, 8),
child: Text(
_versions.versions[0].changelog,
style: TextStyle(fontSize: 16.0),
),
),
FreezerDivider(),
Container(height: 8.0),
//Available download
if (_versionDownload != null)
Column(children: [
RaisedButton(
child: Text('Download'.i18n + ' (${_versionDownload.version})'),
onPressed: _buttonEnabled ? () {
setState(() => _buttonEnabled = false);
_download();
}:null
),
Padding(
padding: EdgeInsets.all(8.0),
child: LinearProgressIndicator(value: _progress),
)
]),
//Unsupported arch
if (_versionDownload == null)
Text(
'Unsupported platform!'.i18n + ' $_arch',
textAlign: TextAlign.center,
style: TextStyle(fontSize: 16.0),
)
],
)
],
)
);
}
}
class FreezerVersions {
String latest;
List<FreezerVersion> versions;
FreezerVersions({this.latest, this.versions});
factory FreezerVersions.fromJson(Map data) => FreezerVersions(
latest: data['android']['latest'],
versions: data['android']['versions'].map<FreezerVersion>((v) => FreezerVersion.fromJson(v)).toList()
);
//Fetch from website API
static Future<FreezerVersions> fetch() async {
http.Response response = await http.get('https://freezer.life/api/versions');
return FreezerVersions.fromJson(jsonDecode(response.body));
}
static Future checkUpdate() async {
//Check only each 24h
int updateDelay = 86400000;
if ((DateTime.now().millisecondsSinceEpoch - (cache.lastUpdateCheck??0)) < updateDelay) return;
cache.lastUpdateCheck = DateTime.now().millisecondsSinceEpoch;
await cache.save();
FreezerVersions versions = await FreezerVersions.fetch();
//Load current version
PackageInfo info = await PackageInfo.fromPlatform();
if (info.version == versions.latest) return;
//Get architecture
String _arch = await DownloadManager.platform.invokeMethod("arch");
if (_arch == 'armv8l')
_arch = 'arm32';
//Check compatible architecture
if (versions.versions[0].downloads.firstWhere((d) => d.version.toLowerCase().contains(_arch.toLowerCase()), orElse: () => null) == null) return;
//Show notification
FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
const AndroidInitializationSettings androidInitializationSettings = AndroidInitializationSettings('drawable/ic_logo');
final InitializationSettings initializationSettings = InitializationSettings(androidInitializationSettings, null);
await flutterLocalNotificationsPlugin.initialize(initializationSettings);
AndroidNotificationDetails androidNotificationDetails = AndroidNotificationDetails('freezerupdates', 'Freezer Updates'.i18n, 'Freezer Updates'.i18n);
NotificationDetails notificationDetails = NotificationDetails(androidNotificationDetails, null);
await flutterLocalNotificationsPlugin.show(0, 'New update available!'.i18n, 'Update to latest version in the settings.'.i18n, notificationDetails);
}
}
class FreezerVersion {
String version;
String changelog;
List<FreezerDownload> downloads;
FreezerVersion({this.version, this.changelog, this.downloads});
factory FreezerVersion.fromJson(Map data) => FreezerVersion(
version: data['version'],
changelog: data['changelog'],
downloads: data['downloads'].map<FreezerDownload>((d) => FreezerDownload.fromJson(d)).toList()
);
}
class FreezerDownload {
String version;
String directUrl;
FreezerDownload({this.version, this.directUrl});
factory FreezerDownload.fromJson(Map data) => FreezerDownload(
version: data['version'],
directUrl: data['links'].first['url']
);
}