Obtainium/lib/main.dart

import 'package:flutter/material.dart';
import 'package:obtainium/services/apk_service.dart';
import 'package:obtainium/services/source_service.dart';
import 'package:provider/provider.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(MultiProvider(
    providers: [
      Provider(
        create: (context) => APKService(),
        dispose: (context, apkInstallService) => apkInstallService.dispose(),
      )
    ],
    child: const MyApp(),
  ));
}

// Extract a GitHub project name and author account name from a GitHub URL (can be any sub-URL of the project)
Map<String, String>? getAppNamesFromGitHubURL(String url) {
  RegExp regex = RegExp(r'://github.com/[^/]*/[^/]*');
  var match = regex.firstMatch(url.toLowerCase());
  if (match != null) {
    var uri = url.substring(match.start + 14, match.end);
    var slashIndex = uri.indexOf('/');
    var author = uri.substring(0, slashIndex);
    var appName = uri.substring(slashIndex + 1);
    return {'author': author, 'appName': appName};
  }
  return null;
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Obtainium',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Obtainium'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int ind = 0;
  var urls = [
    'https://github.com/Ashinch/ReadYou/releases/download', // Should work
    'http://github.com/syncthing/syncthing-android/releases/tag/1.20.4', // Should work
    'https://github.com/videolan/vlc' // Should not
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              urls[ind],
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          SourceService().getApp(urls[ind]).then((app) {
            Provider.of<APKService>(context, listen: false)
                .backgroundDownloadAndInstallAPK(app.apkUrl, app.id);
            setState(() {
              ind = ind == (urls.length - 1) ? 0 : ind + 1;
            });
          }).catchError((err) {
            print(err);
          });
        },
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }

  @override
  void dispose() {
    super.dispose();
  }
}