import 'dart:async'; import 'dart:io'; import 'package:flutter/material.dart'; import 'package:path_provider/path_provider.dart'; import 'package:youtube_explode_dart/youtube_explode_dart.dart' as yt;

void main() => runApp(MyApp());

class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'YouTube Audio Downloader', theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(), ); } }

class MyHomePage extends StatefulWidget { @override _MyHomePageState createState() => _MyHomePageState(); }

class _MyHomePageState extends State { String _link = ''; String _destinationFolder = ''; String _status = ''; double _progressValue = 0.0;

void _chooseFolder() async { Directory directory = await getExternalStorageDirectory(); setState(() { _destinationFolder = directory.path; _status = "Pasta de destino selecionada: $_destinationFolder"; }); }

Future _downloadAudio() async { if (_link.isEmpty) { setState(() { _status = "Por favor, insira um link válido."; }); return; }

if (_destinationFolder.isEmpty) {
  setState(() {
    _status = "Por favor, escolha uma pasta de destino.";
  });
  return;
}

final yt.YoutubeExplode ytExplode = yt.YoutubeExplode();
final yt.Video video = await ytExplode.videos.get(_link);
final yt.AudioStreamInfo audio = video.audio.first;
final File file = File('$_destinationFolder/${video.title}.wav');

await for (final List<int> chunk in ytExplode.videos.streamsClient.get(audio)) {
  file.writeAsBytesSync(chunk, mode: FileMode.append);
}

setState(() {
  _status = "Download completo: ${file.path}";
});

await ytExplode.close();

}

@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('YouTube Audio Downloader'), ), body: Padding( padding: const EdgeInsets.all(16.0), child: Column( crossAxisAlignment: CrossAxisAlignment.stretch, children: [ TextField( onChanged: (value) { setState(() { _link = value; }); }, decoration: InputDecoration(labelText: 'Link do vídeo'), ), SizedBox(height: 16.0), RaisedButton( onPressed: _chooseFolder, child: Text('Escolher Pasta'), ), SizedBox(height: 16.0), RaisedButton( onPressed: _downloadAudio, child: Text('Baixar Áudio'), ), SizedBox(height: 16.0), LinearProgressIndicator(value: _progressValue), SizedBox(height: 16.0), Text(_status), ], ), ), ); } }