80 lines
2.4 KiB
Dart
80 lines
2.4 KiB
Dart
/*
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* Copyright (c) 2024-2026 Fabian Freund.
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*
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* This file is part of WebLibre
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* (see https://weblibre.eu).
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import 'dart:async';
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import 'package:local_auth/local_auth.dart';
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import 'package:riverpod_annotation/riverpod_annotation.dart';
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import 'package:weblibre/core/logger.dart';
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import 'package:weblibre/features/user/data/models/auth_settings.dart';
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part 'local_authentication.g.dart';
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@Riverpod(keepAlive: true)
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class LocalAuthenticationService extends _$LocalAuthenticationService {
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final _auth = LocalAuthentication();
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final _cache = <String, (DateTime, AuthSettings)>{};
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void evictCacheOnBackground() {
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_cache.removeWhere(
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(key, value) => value.$2.autoLockMode == AutoLockMode.background,
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);
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}
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bool isCached(String authKey) {
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final auth = _cache[authKey];
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if (auth == null) return false;
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if (auth.$2.autoLockMode == AutoLockMode.timeout) {
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return DateTime.now().difference(auth.$1) < auth.$2.timeout;
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}
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// Background mode cache stays valid until app background eviction.
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return true;
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}
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Future<bool> authenticate({
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required String authKey,
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required String localizedReason,
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AuthSettings? settings,
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bool useAuthCache = false,
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}) async {
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try {
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final useCache = useAuthCache && isCached(authKey);
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final success =
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useCache ||
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await _auth.authenticate(localizedReason: localizedReason);
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if (success && settings != null) {
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_cache[authKey] = (DateTime.now(), settings);
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}
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return success;
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} on LocalAuthException catch (e, s) {
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logger.e('Could not authenticate', error: e, stackTrace: s);
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return false;
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}
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}
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@override
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Future<bool> build() {
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return _auth.canCheckBiometrics;
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}
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}
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