fluffychat/lib/widgets/lock_screen.dart

import 'package:flutter/material.dart';

import 'package:flutter_app_lock/flutter_app_lock.dart';
import 'package:flutter_gen/gen_l10n/l10n.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:pin_code_text_field/pin_code_text_field.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:fluffychat/config/app_config.dart';
import 'package:fluffychat/config/setting_keys.dart';
import 'package:fluffychat/config/themes.dart';
import 'layouts/login_scaffold.dart';

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

  @override
  LockScreenState createState() => LockScreenState();
}

class LockScreenState extends State<LockScreen> {
  final TextEditingController _textEditingController = TextEditingController();
  final FocusNode _focusNode = FocusNode();
  bool _wrongInput = false;
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: FluffyThemes.buildTheme(Brightness.light),
      darkTheme: FluffyThemes.buildTheme(Brightness.dark),
      localizationsDelegates: L10n.localizationsDelegates,
      supportedLocales: L10n.supportedLocales,
      home: Builder(
        builder: (context) => LoginScaffold(
          appBar: AppBar(
            automaticallyImplyLeading: false,
            elevation: 0,
            centerTitle: true,
            title: Text(L10n.of(context)!.pleaseEnterYourPin),
            backgroundColor: Colors.transparent,
          ),
          body: Container(
            decoration: BoxDecoration(
              color: Theme.of(context).colorScheme.background,
              gradient: LinearGradient(
                begin: Alignment.topRight,
                end: Alignment.bottomLeft,
                stops: const [
                  0.1,
                  0.4,
                  0.6,
                  0.9,
                ],
                colors: [
                  Theme.of(context).secondaryHeaderColor.withAlpha(16),
                  Theme.of(context).primaryColor.withAlpha(16),
                  Theme.of(context).colorScheme.secondary.withAlpha(16),
                  Theme.of(context).colorScheme.background.withAlpha(16),
                ],
              ),
            ),
            alignment: Alignment.center,
            child: PinCodeTextField(
              autofocus: true,
              controller: _textEditingController,
              focusNode: _focusNode,
              pinBoxRadius: AppConfig.borderRadius,
              pinTextStyle: const TextStyle(fontSize: 32),
              hideCharacter: true,
              hasError: _wrongInput,
              onDone: (String input) async {
                if (input ==
                    await ([TargetPlatform.linux]
                            .contains(Theme.of(context).platform)
                        ? SharedPreferences.getInstance().then(
                            (prefs) => prefs.getString(SettingKeys.appLockKey))
                        : const FlutterSecureStorage()
                            .read(key: SettingKeys.appLockKey))) {
                  AppLock.of(context)!.didUnlock();
                } else {
                  _textEditingController.clear();
                  setState(() => _wrongInput = true);
                  _focusNode.requestFocus();
                }
              },
            ),
          ),
        ),
      ),
    );
  }
}