Flutter Guides

import 'package:flutter/material.dart';
import 'package:flutter_web_auth/flutter_web_auth.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';
import 'package:flutter_dotenv/flutter_dotenv.dart';

void main() {
  await dotenv.load(fileName: ".env");
  runApp(const MyApp());
}

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  String _counter = 'Hello Furo!';
  final String _defaultMsg = 'Set Up Your Client ID';

  Future<void> _login() async {

    const clientId = dotenv.env['CLIENT_ID'] || 'Set Up Your Client ID';
    if (clientId == _defaultMsg) {
      setState(() {
        _counter = _defaultMsg;
      });
      return;
    }

    const mode = 'web'; // web or mobile
    const port = '45453';
    const redirectUri = mode == 'web'
        ? 'http://localhost:$port/auth.html'
        : 'login.test.furo://auth';
    const loginUrl =
        'https://auth.furo.one/login/$clientId?redirect_uri=$redirectUri';

    const scheme = mode == 'web' ? 'http' : 'login.test.furo';
    final result = await FlutterWebAuth.authenticate(
        url: loginUrl, callbackUrlScheme: scheme);
    print(result);
    final code = Uri.parse(result).queryParameters['code'];
    if (code == null) {
      return;
    }
    print(code);
    var response = await http.post(
      Uri.parse('https://api.furo.one/sessions/code/authenticate'),
      headers: <String, String>{
        'Content-Type': 'application/json',
      },
      body: jsonEncode(<String, String>{
        'code': code,
      }),
    );
    print(response.body);
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter = response.body;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'Click the button to login to Furo',
            ),
            Text(
              _counter,
              style: Theme.of(context).textTheme.headlineMedium,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _login,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}