opencanteen/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:opencanteen/loginmanager.dart';
import 'package:connectivity_plus/connectivity_plus.dart';
import 'package:opencanteen/okna/home.dart';
import 'package:canteenlib/canteenlib.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      localizationsDelegates: GlobalMaterialLocalizations.delegates,
      supportedLocales: const [Locale("cs")],
      title: 'OpenCanteen',
      theme: ThemeData(
        primarySwatch: Colors.purple,
      ),
      darkTheme: ThemeData(
        brightness: Brightness.dark,
        primarySwatch: Colors.purple,
      ),
      home: const LoginPage(),
    );
  }
}

class LoginPage extends StatefulWidget {
  const LoginPage({Key? key}) : super(key: key);

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  TextEditingController userControl = TextEditingController();
  TextEditingController passControl = TextEditingController();
  TextEditingController canteenControl = TextEditingController();
  bool rememberMe = false;

  @override
  void initState() {
    super.initState();
    LoginManager.getDetails().then((r) async {
      var connectivityResult = await (Connectivity().checkConnectivity());
      if (connectivityResult == ConnectivityResult.none) {
        ScaffoldMessenger.of(context).hideCurrentSnackBar();
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(
            content: Text(
                "Nastala chyba při kontaktování serveru, zkontrolujte připojení"),
          ),
        );
      }

      if (r != null) {
        showDialog(
            context: context,
            barrierDismissible: false,
            builder: (_) => Dialog(
                  child: SizedBox(
                    height: 100,
                    child: Row(children: const [
                      CircularProgressIndicator(),
                      Text("Přihlašuji vás")
                    ]),
                  ),
                ));
        var canteen = Canteen(r["url"]!);
        var l = await canteen.login(r["user"]!, r["pass"]!);
        if (!l) {
          ScaffoldMessenger.of(context).hideCurrentSnackBar();
          ScaffoldMessenger.of(context).showSnackBar(
            const SnackBar(
              content: Text("Přihlášení se nezdařilo, zkontrolujte údaje"),
            ),
          );
          return;
        }
        Navigator.pushReplacement(
          context,
          MaterialPageRoute(
              builder: (context) => HomePage(
                    user: r["user"]!,
                    canteen: canteen,
                  )),
        );
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Přihlášení"),
      ),
      body: Center(
        child: SizedBox(
          width: MediaQuery.of(context).size.width - 50,
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              const Text(
                'OpenCanteen',
                textAlign: TextAlign.center,
                style: TextStyle(fontWeight: FontWeight.bold, fontSize: 40),
              ),
              const Text(
                'Přihlášení',
                textAlign: TextAlign.center,
              ),
              TextField(
                controller: userControl,
                autofillHints: const [AutofillHints.username],
                decoration:
                    const InputDecoration(labelText: 'Uživatelské jméno'),
              ),
              TextField(
                autofillHints: const [AutofillHints.password],
                decoration: const InputDecoration(labelText: 'Heslo'),
                controller: passControl,
                obscureText: true,
              ),
              TextField(
                autofillHints: const [AutofillHints.url],
                decoration: const InputDecoration(labelText: 'iCanteen URL'),
                keyboardType: TextInputType.url,
                controller: canteenControl,
              ),
              Row(mainAxisAlignment: MainAxisAlignment.center, children: [
                Switch(
                    value: rememberMe,
                    onChanged: (value) {
                      setState(() {
                        rememberMe = value;
                      });
                    }),
                const Text("Zapamatovat si mě")
              ]),
              TextButton(
                  onPressed: () async {
                    if (canteenControl.text.contains("http://")) {
                      // kontrolujeme šifrované spojení
                      var d = await showDialog<bool>(
                          context: context,
                          builder: (c) => AlertDialog(
                                title: const Text("Varování!"),
                                content: const SingleChildScrollView(
                                    child: Text(
                                        "Snažíte se přihlásit přes nešifrované spojení HTTP, jste si jisti, že tak chcete učinit?")),
                                actions: [
                                  TextButton(
                                      onPressed: () => Navigator.pop(c, true),
                                      child: const Text("Ano")),
                                  TextButton(
                                      onPressed: () => Navigator.pop(c, false),
                                      child: const Text("Ne, změnit"))
                                ],
                              ));
                      if (!d!) return;
                    }

                    // souhlas
                    const storage = FlutterSecureStorage();
                    var odsouhlasil = await storage.read(key: "oc_souhlas");
                    if (odsouhlasil == null || odsouhlasil != "ano") {
                      var d = await showDialog<bool>(
                          context: context,
                          builder: (c) => AlertDialog(
                                title: const Text("Pozor"),
                                content: const SingleChildScrollView(
                                    child: Text(
                                        "Toto není oficiální aplikace k ovládání iCanteen. Autor neručí za ztráty nebo nefunkčnost v souvislosti s používáním této aplikace. Tato zpráva se znovu neukáže.")),
                                actions: [
                                  TextButton(
                                      onPressed: () => Navigator.pop(c, true),
                                      child: const Text("Souhlasím")),
                                  TextButton(
                                      onPressed: () => Navigator.pop(c, false),
                                      child: const Text("Nesouhlasím"))
                                ],
                              ));
                      if (!d!) return;
                      await storage.write(key: "oc_souhlas", value: "ano");
                    }

                    var canteen = Canteen(canteenControl.text);
                    var l =
                        await canteen.login(userControl.text, passControl.text);
                    if (!l) {
                      ScaffoldMessenger.of(context).hideCurrentSnackBar();
                      ScaffoldMessenger.of(context).showSnackBar(
                        const SnackBar(
                          content: Text(
                              "Přihlášení se nezdařilo, zkontrolujte údaje"),
                        ),
                      );
                      return;
                    }
                    if (rememberMe) {
                      LoginManager.setDetails(userControl.text,
                          passControl.text, canteenControl.text);
                    }
                    Navigator.pushReplacement(
                      context,
                      MaterialPageRoute(
                          builder: (context) => HomePage(
                                user: userControl.text,
                                canteen: canteen,
                              )),
                    );
                  },
                  child: const Text("Přihlásit se")),
            ],
          ),
        ),
      ),
    );
  }
}