yubioath-flutter/lib/oath/views/unlock_form.dart

/*
 * Copyright (C) 2022-2023 Yubico.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../app/message.dart';
import '../../app/models.dart';
import '../../widgets/app_input_decoration.dart';
import '../../widgets/app_text_field.dart';
import '../keys.dart' as keys;
import '../models.dart';
import '../state.dart';

class UnlockForm extends ConsumerStatefulWidget {
  final DevicePath _devicePath;
  final KeystoreState keystore;
  const UnlockForm(this._devicePath, {required this.keystore, super.key});

  @override
  ConsumerState<UnlockForm> createState() => _UnlockFormState();
}

class _UnlockFormState extends ConsumerState<UnlockForm> {
  final _passwordController = TextEditingController();
  bool _remember = false;
  bool _passwordIsWrong = false;
  bool _isObscure = true;

  void _submit() async {
    setState(() {
      _passwordIsWrong = false;
    });
    final (success, remembered) = await ref
        .read(oathStateProvider(widget._devicePath).notifier)
        .unlock(_passwordController.text, remember: _remember);
    if (!mounted) return;
    if (!success) {
      setState(() {
        _passwordIsWrong = true;
        _passwordController.clear();
      });
    } else if (_remember && !remembered) {
      showMessage(context, AppLocalizations.of(context)!.l_remember_pw_failed);
    }
  }

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final keystoreFailed = widget.keystore == KeystoreState.failed;
    return Column(
      children: [
        Padding(
          padding: const EdgeInsets.only(left: 18.0, right: 18, top: 14),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                l10n.l_enter_oath_pw,
              ),
              const SizedBox(height: 16.0),
              AppTextField(
                key: keys.passwordField,
                controller: _passwordController,
                autofocus: true,
                obscureText: _isObscure,
                autofillHints: const [AutofillHints.password],
                decoration: AppInputDecoration(
                  border: const OutlineInputBorder(),
                  labelText: l10n.s_password,
                  errorText: _passwordIsWrong ? l10n.s_wrong_password : null,
                  helperText: '', // Prevents resizing when errorText shown
                  prefixIcon: const Icon(Icons.password_outlined),
                  suffixIcon: IconButton(
                    icon: Icon(
                        _isObscure ? Icons.visibility : Icons.visibility_off),
                    onPressed: () {
                      setState(() {
                        _isObscure = !_isObscure;
                      });
                    },
                    tooltip: _isObscure
                        ? l10n.s_show_password
                        : l10n.s_hide_password,
                  ),
                ),
                onChanged: (_) => setState(() {
                  _passwordIsWrong = false;
                }), // Update state on change
                onSubmitted: (_) => _submit(),
              ),
              const SizedBox(height: 8.0),
              Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  Wrap(
                    alignment: WrapAlignment.spaceBetween,
                    crossAxisAlignment: WrapCrossAlignment.center,
                    spacing: 4.0,
                    runSpacing: 8.0,
                    children: [
                      keystoreFailed
                          ? Wrap(
                              crossAxisAlignment: WrapCrossAlignment.center,
                              spacing: 4.0,
                              runSpacing: 8.0,
                              children: [
                                const Icon(Icons.warning_amber_rounded),
                                Text(l10n.l_keystore_unavailable)
                              ],
                            )
                          : FilterChip(
                              label: Text(l10n.s_remember_password),
                              selected: _remember,
                              onSelected: (value) {
                                setState(() {
                                  _remember = value;
                                });
                              },
                            ),
                      ElevatedButton.icon(
                        key: keys.unlockButton,
                        label: Text(l10n.s_unlock),
                        icon: const Icon(Icons.lock_open),
                        onPressed: _passwordController.text.isNotEmpty
                            ? _submit
                            : null,
                      ),
                    ],
                  ),
                ],
              ),
            ],
          ),
        ),
      ],
    );
  }
}