77 lines
2.6 KiB
Dart
77 lines
2.6 KiB
Dart
/*
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* Famedly Matrix SDK
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* Copyright (C) 2019, 2020 Famedly GmbH
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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 <https://www.gnu.org/licenses/>.
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*/
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import 'dart:convert';
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import 'package:olm/olm.dart' as olm;
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import '../../src/database/database.dart' show DbOutboundGroupSession;
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import '../../src/utils/logs.dart';
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class OutboundGroupSession {
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/// The devices is a map from user id to device id to if the device is blocked.
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/// This way we can easily know if a new user is added, leaves, a new devices is added, and,
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/// very importantly, if we block a device. These are all important for determining if/when
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/// an outbound session needs to be rotated.
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Map<String, Map<String, bool>> devices;
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DateTime creationTime;
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olm.OutboundGroupSession outboundGroupSession;
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int sentMessages;
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bool get isValid => outboundGroupSession != null;
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final String key;
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OutboundGroupSession(
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{this.devices,
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this.creationTime,
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this.outboundGroupSession,
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this.sentMessages,
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this.key});
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OutboundGroupSession.fromDb(DbOutboundGroupSession dbEntry, String key)
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: key = key {
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try {
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devices = {};
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for (final entry in json.decode(dbEntry.deviceIds).entries) {
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devices[entry.key] = Map<String, bool>.from(entry.value);
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}
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} catch (e) {
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// devices is bad (old data), so just not use this session
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Logs.info(
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'[OutboundGroupSession] Session in database is old, not using it. ' +
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e.toString());
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return;
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}
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outboundGroupSession = olm.OutboundGroupSession();
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try {
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outboundGroupSession.unpickle(key, dbEntry.pickle);
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creationTime = DateTime.fromMillisecondsSinceEpoch(dbEntry.creationTime);
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sentMessages = dbEntry.sentMessages;
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} catch (e, s) {
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dispose();
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Logs.error(
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'[LibOlm] Unable to unpickle outboundGroupSession: ' + e.toString(),
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s);
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}
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}
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void dispose() {
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outboundGroupSession?.free();
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outboundGroupSession = null;
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}
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}
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