yubioath-flutter/lib/otp/views/configure_hotp_dialog.dart

/*
 * Copyright (C) 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 'package:yubico_authenticator/app/logging.dart';
import 'package:yubico_authenticator/core/models.dart';
import 'package:yubico_authenticator/core/state.dart';
import 'package:yubico_authenticator/oath/models.dart';
import 'package:logging/logging.dart';

import '../../app/message.dart';
import '../../app/models.dart';
import '../../app/state.dart';
import '../../widgets/choice_filter_chip.dart';
import '../../widgets/responsive_dialog.dart';
import '../models.dart';
import '../state.dart';
import '../keys.dart' as keys;
import 'overwrite_confirm_dialog.dart';

final _log = Logger('otp.view.configure_hotp_dialog');

class ConfigureHotpDialog extends ConsumerStatefulWidget {
  final DevicePath devicePath;
  final OtpSlot otpSlot;
  const ConfigureHotpDialog(this.devicePath, this.otpSlot, {super.key});

  @override
  ConsumerState<ConsumerStatefulWidget> createState() =>
      _ConfigureHotpDialogState();
}

class _ConfigureHotpDialogState extends ConsumerState<ConfigureHotpDialog> {
  final _secretController = TextEditingController();
  bool _validateSecretLength = false;
  bool _validateSecretFormat = false;
  int _digits = defaultDigits;
  final List<int> _digitsValues = [6, 8];
  bool _appendEnter = true;
  bool _isObscure = true;

  @override
  void dispose() {
    _secretController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;

    final secret = _secretController.text.replaceAll(' ', '');
    final secretLengthValid = secret.isNotEmpty && secret.length * 5 % 8 < 5;
    final secretFormatValid = Format.base32.isValid(secret);

    return ResponsiveDialog(
      title: Text(l10n.s_hotp),
      actions: [
        TextButton(
          key: keys.saveButton,
          onPressed: !_validateSecretLength
              ? () async {
                  if (!secretLengthValid) {
                    setState(() {
                      _validateSecretLength = true;
                    });
                    return;
                  }
                  if (!secretFormatValid) {
                    setState(() {
                      _validateSecretFormat = true;
                    });
                    return;
                  }

                  if (!await confirmOverwrite(context, widget.otpSlot)) {
                    return;
                  }

                  final otpNotifier =
                      ref.read(otpStateProvider(widget.devicePath).notifier);
                  try {
                    await otpNotifier.configureSlot(widget.otpSlot.slot,
                        configuration: SlotConfiguration.hotp(
                            key: secret,
                            options: SlotConfigurationOptions(
                                digits8: _digits == 8,
                                appendCr: _appendEnter)));
                    await ref.read(withContextProvider)((context) async {
                      Navigator.of(context).pop();
                      showMessage(context,
                          l10n.l_slot_credential_configured(l10n.s_hotp));
                    });
                  } catch (e) {
                    _log.error('Failed to program credential', e);
                    await ref.read(withContextProvider)((context) async {
                      showMessage(
                        context,
                        l10n.p_otp_slot_configuration_error(
                            widget.otpSlot.slot.getDisplayName(l10n)),
                        duration: const Duration(seconds: 4),
                      );
                    });
                  }
                }
              : null,
          child: Text(l10n.s_save),
        )
      ],
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 18.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            TextField(
              key: keys.secretField,
              controller: _secretController,
              obscureText: _isObscure,
              autofillHints: isAndroid ? [] : const [AutofillHints.password],
              decoration: InputDecoration(
                  suffixIcon: Wrap(
                    crossAxisAlignment: WrapCrossAlignment.center,
                    children: [
                      IconButton(
                        icon: Icon(
                            _isObscure
                                ? Icons.visibility
                                : Icons.visibility_off,
                            color: !(_validateSecretLength ||
                                    _validateSecretFormat)
                                ? IconTheme.of(context).color
                                : null),
                        onPressed: () {
                          setState(() {
                            _isObscure = !_isObscure;
                          });
                        },
                      ),
                      if (_validateSecretLength || _validateSecretFormat) ...[
                        const Icon(Icons.error_outlined),
                        const SizedBox(
                          width: 8.0,
                        )
                      ]
                    ],
                  ),
                  border: const OutlineInputBorder(),
                  prefixIcon: const Icon(Icons.key_outlined),
                  labelText: l10n.s_secret_key,
                  helperText: '', // Prevents resizing when errorText shown
                  errorText: _validateSecretLength && !secretLengthValid
                      ? l10n.s_invalid_length
                      : _validateSecretFormat && !secretFormatValid
                          ? l10n.l_invalid_format_allowed_chars(
                              Format.base32.allowedCharacters)
                          : null),
              textInputAction: TextInputAction.next,
              onChanged: (value) {
                setState(() {
                  _validateSecretLength = false;
                  _validateSecretFormat = false;
                });
              },
            ),
            Wrap(
              crossAxisAlignment: WrapCrossAlignment.center,
              spacing: 4.0,
              runSpacing: 8.0,
              children: [
                FilterChip(
                  label: Text(l10n.s_append_enter),
                  tooltip: l10n.l_append_enter_desc,
                  selected: _appendEnter,
                  onSelected: (value) {
                    setState(() {
                      _appendEnter = value;
                    });
                  },
                ),
                ChoiceFilterChip<int>(
                    items: _digitsValues,
                    value: _digits,
                    selected: _digits != defaultDigits,
                    itemBuilder: (value) => Text(l10n.s_num_digits(value)),
                    onChanged: (digits) {
                      setState(() {
                        _digits = digits;
                      });
                    }),
              ],
            )
          ]
              .map((e) => Padding(
                    padding: const EdgeInsets.symmetric(vertical: 8.0),
                    child: e,
                  ))
              .toList(),
        ),
      ),
    );
  }
}