566 lines
19 KiB
Dart
566 lines
19 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'dart:math';
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import 'package:archive/archive.dart';
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import 'package:device_info_plus/device_info_plus.dart';
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import 'package:http/http.dart' as http;
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import 'package:isar/isar.dart';
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import 'package:mqtt_client/mqtt_client.dart';
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import 'package:mqtt_client/mqtt_server_client.dart';
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import 'package:stadtbote/model/enqueued_message.dart';
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import 'package:stadtbote/model/job.dart';
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import 'package:stadtbote/model/log_entry.dart';
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import 'package:stadtbote/model/message.dart';
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import 'package:stadtbote/model/location_status.dart';
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import 'package:stadtbote/model/rank.dart';
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import 'package:stadtbote/protocoll_messages/acknowledge_job.dart';
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import 'package:stadtbote/protocoll_messages/bootstrap_request.dart';
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import 'package:stadtbote/protocoll_messages/bootstrap_response_payload.dart';
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import 'package:stadtbote/protocoll_messages/device_log_request.dart';
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import 'package:stadtbote/protocoll_messages/device_log_response.dart';
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import 'package:stadtbote/protocoll_messages/device_object.dart';
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import 'package:stadtbote/protocoll_messages/start_session_message.dart';
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import 'package:stadtbote/protocoll_messages/sync_jobs_message.dart';
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import 'package:stadtbote/protocoll_messages/track_message.dart';
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import 'package:stadtbote/tools/connection_status.dart';
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import 'package:stadtbote/tools/message_service.dart';
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import 'package:stadtbote/tools/messages/PublishPayloadMessage.dart';
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import 'package:stadtbote/tools/messages/connect_client_message.dart';
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import 'package:stadtbote/tools/messages/current_connection_status_message.dart';
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import 'package:stadtbote/tools/messages/disconnect_client_message.dart';
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import 'package:stadtbote/tools/messages/job_deleted_message.dart';
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import 'package:stadtbote/tools/messages/job_received_message.dart';
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import 'package:stadtbote/tools/messages/message_message.dart';
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import 'package:stadtbote/tools/messages/ranking_updated.dart';
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import 'package:stadtbote/tools/messages/request_connection_status_message.dart';
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import 'package:stadtbote/tools/messages/session_info_update.dart';
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import 'package:stadtbote/tools/messages/status_info_update.dart';
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// ignore: depend_on_referenced_packages
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import 'package:typed_data/typed_buffers.dart';
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import 'package:uuid/uuid.dart';
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import '../main.dart';
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import '../model/session_status.dart';
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import 'constants.dart';
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import 'util.dart';
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enum ConnectionStateEnum {
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notConnected,
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connected
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}
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class MqttCore {
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late ConnectionStateEnum connectionState = ConnectionStateEnum.notConnected;
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late bool _disconnectInProgress = false;
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late String _brokerUri;
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late String _clientId;
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late int _brokerPort;
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late String _fromServerTopic;
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late String _toServerTopic;
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MqttServerClient? _mqttClient;
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late int _reconnectDelay = 0;
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Timer? _reconnectTimer;
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Timer? _trackTimer;
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MqttCore() {
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initMessages();
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_disconnectInProgress = false;
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_processBootstrap();
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}
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_disconnect() {
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_disconnectInProgress = true;
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_cancelReconnectTimer();
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_cancelTrackTimer();
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if (_mqttClient != null) {
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_mqttClient!.disconnect();
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}
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connectionState = ConnectionStateEnum.notConnected;
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}
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_connectToBroker() async {
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try {
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String clientId = await Util.getAppUuid();
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Util.logInfo("client id: $clientId");
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Util.logInfo("broker uri: $_brokerUri");
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Util.logInfo("broker port: $_brokerPort");
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_mqttClient = MqttServerClient.withPort(_brokerUri, clientId, _brokerPort);
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_mqttClient!.logging(on: false);
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_mqttClient!.keepAlivePeriod = 5;
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_mqttClient!.disconnectOnNoResponsePeriod = 10;
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_mqttClient!.autoReconnect = true;
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_mqttClient!.onDisconnected = _clientDisconnected;
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_mqttClient!.onAutoReconnect = _clientDisconnected;
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_mqttClient!.onAutoReconnected = _clientConnected;
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_mqttClient!.connectionMessage = MqttConnectMessage()
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.withClientIdentifier(await Util.getAppUuid())
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.authenticateAs("app", "apppwd");
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await _mqttClient!.connect();
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if (_mqttClient!.connectionStatus?.state == MqttConnectionState.connected) {
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Util.logInfo('Verbunden mit dem MQTT-Broker!');
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_reconnectDelay = 0;
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_setupMqtt();
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_initSession();
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} else {
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Util.logInfo('Verbindung zum MQTT-Broker fehlgeschlagen!');
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MessageService().publish<ConnectionStatus>(Constants.messageTopicConnectionStatusChanged, arguments: ConnectionStatus(status: ConnectionStatusEnum.notConnected));
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}
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} catch (ex) {
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Util.logInfo('Verbindung zum MQTT-Broker fehlgeschlagen!: $ex');
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MessageService().publish<ConnectionStatus>(Constants.messageTopicConnectionStatusChanged, arguments: ConnectionStatus(status: ConnectionStatusEnum.notConnected));
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}
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}
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publishBinary(String topic, List<int> data) {
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if (_mqttClient != null) {
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var buffer = Uint8Buffer();
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buffer.addAll(data);
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_mqttClient!.publishMessage(topic, MqttQos.exactlyOnce, buffer);
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Util.logInfo("binary message send to $topic");
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} else {
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Util.logException("publishBinary called while offline!");
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}
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}
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publishText(String topic, String text) {
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if (_mqttClient != null) {
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var buffer = Uint8Buffer();
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buffer.addAll(utf8.encode(text));
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_mqttClient!.publishMessage(topic, MqttQos.exactlyOnce, buffer);
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Util.logInfo("message\n$text\nsend to $topic");
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} else {
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Util.logException("publishBinary called while offline!");
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}
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}
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publishPayloadMessage(String topic, Map<String, dynamic> payload) {
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var payloadContainer = PayloadContainer();
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payloadContainer.id = const Uuid().v4().toString();
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payloadContainer.recv = topic;
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payloadContainer.store = true;
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payloadContainer.payload = payload;
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var json = jsonEncode(payloadContainer.toJson());
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try {
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publishText(_toServerTopic, json);
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} catch (e) {
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_enqueueMessage(_toServerTopic, jsonEncode(payloadContainer.toJson()));
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}
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}
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void _setupMqtt() async {
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Util.logInfo('_setupMqtt called');
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_mqttClient!.updates?.listen((List<MqttReceivedMessage<MqttMessage>> c) {
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try {
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final MqttPublishMessage message = c[0].payload as MqttPublishMessage;
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String payload = utf8.decode(MqttPublishPayload.bytesToStringAsString(message.payload.message).codeUnits);
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var topic = message.variableHeader?.topicName;
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Util.logInfo('message received\ntopic: $topic\nmessage: $payload');
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Map<String, dynamic> messageData = jsonDecode(payload);
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for (var entry in messageData.keys) {
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if (entry == 'payload') {
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var payload = messageData[entry];
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for (var payloadEntry in payload.keys) {
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var payloadData = payload[payloadEntry];
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switch (payloadEntry) {
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case 'session':
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_sessionMessageReceived(payloadData);
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break;
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case 'location_status':
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_locationSatusMessageReceived(jsonDecode(payload));
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break;
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case 'ranking':
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_rankingMessageReceived(jsonDecode(payload));
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break;
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case 'job':
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_jobMessageReceived(jsonDecode(payload));
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break;
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case 'job_del':
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_jobDeleteReceived(jsonDecode(payload));
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break;
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case 'sync_request':
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_syncRequestReceived(jsonDecode(payload));
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break;
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case "mssg":
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_messageMessageReceived(jsonDecode(payload));
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break;
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case "upload_device_log":
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_messageUploadDeviceLogReceived(jsonDecode(payload));
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break;
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default:
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Util.logInfo('Unknown topic: $topic');
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break;
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}
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}
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}
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}
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} catch(ex) {
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Util.logException(ex.toString());
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}
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});
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if (await Util.preferencesContainsKey(Constants.prefsPreviousMqttSubscription)) {
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String previousMqttSubscription = await Util.preferencesGetString(Constants.prefsPreviousMqttSubscription, "") as String;
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if (previousMqttSubscription != _fromServerTopic) {
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Util.logInfo('topic changed -> unsubscribe from $previousMqttSubscription');
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_mqttClient!.unsubscribe(previousMqttSubscription);
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}
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_mqttClient!.subscribe(_fromServerTopic, MqttQos.exactlyOnce);
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}
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_mqttClient!.subscribe(_fromServerTopic, MqttQos.exactlyOnce);
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Util.preferencesSaveString(Constants.prefsPreviousMqttSubscription, _fromServerTopic);
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Util.logInfo('subscribed to topic: $_fromServerTopic');
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MessageService().publish<ConnectionStatus>(Constants.messageTopicConnectionStatusChanged, arguments: ConnectionStatus(status: ConnectionStatusEnum.connected));
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}
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void _sessionMessageReceived(payloadData) async {
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connectionState = ConnectionStateEnum.connected;
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await _sendSyncMessage();
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await _sendEnqueuedMessages();
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var sessionStatusMessage = SessionStatus.fromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.sessionStatus.clear();
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await MyApp.isarInstance.sessionStatus.put(sessionStatusMessage);
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});
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MessageService().publish<SessionStatusInfoUpdate>(Constants.messageTopicSessionStatusInfoUpdate, arguments: SessionStatusInfoUpdate(status: sessionStatusMessage));
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_startTrackTimer();
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}
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void _locationSatusMessageReceived(payloadData) async {
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var locationStatus = LocationStatus.fromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.locationStatus.clear();
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await MyApp.isarInstance.locationStatus.put(locationStatus);
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});
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MessageService().publish<LocationStatusUpdate>(Constants.messageTopicLocationStatusUpdated, arguments: LocationStatusUpdate(status: locationStatus));
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}
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void _rankingMessageReceived(payloadData) async {
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var ranking = Ranking.fromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.rankings.clear();
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await MyApp.isarInstance.rankings.put(ranking);
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});
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MessageService().publish<RankingUpdated>(Constants.messageTopicRankingUpdated, arguments: RankingUpdated());
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}
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void _jobMessageReceived(payloadData) async {
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Job newJob = Job.fromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.jobs.put(newJob);
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});
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if (newJob.state == Constants.stateAssigned) {
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if (newJob.global) {
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await Util.playMp3('aaa.mp3');
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} else {
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await Util.playMp3('job_received.mp3');
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}
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}
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_acknowlegdeJob(newJob);
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try {
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MessageService().publish<JobReceivedMessage>(Constants.messageTopicJobReceived, arguments: JobReceivedMessage(job: newJob));
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} catch (ex) {
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Util.logException("publish messageTopicJobReceived failed!");
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}
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}
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void _jobDeleteReceived(payloadData) async {
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for(var jobId in payloadData) {
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.jobs.delete(jobId);
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});
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MessageService().publish<JobDeletedMessage>(Constants.messageTopicJobDeleted, arguments: JobDeletedMessage(id: jobId));
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}
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}
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void _syncRequestReceived(payloadData) async {
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Util.logInfo('_syncRequestReceived');
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_sendSyncMessage();
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}
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void _messageMessageReceived(Map<String, dynamic> payloadData) async {
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var newMessage = await Message.mergeFromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.messages.put(newMessage);
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});
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await Util.playMp3('asbeep.mp3');
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MessageService().publish<MessageReceivedMessage>(Constants.messageTopicMessageReceived, arguments: MessageReceivedMessage(message: newMessage));
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}
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void _messageUploadDeviceLogReceived(payloadData) async {
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var deviceLogRequest = DeviceLogRequest.fromJson(payloadData);
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var logEintries = await MyApp.isarInstance.logEntrys.filter().timeGreaterThan(deviceLogRequest.startDateTime).timeLessThan(deviceLogRequest.endDateTime).findAll();
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var deviceLog = DeviceLogResponse();
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deviceLog.entries = logEintries;
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var json = jsonEncode(deviceLog.toJson());
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var stringBytes = utf8.encode(json);
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var gzipBytes = GZipEncoder().encode(stringBytes);
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var topic = "/log/${_toServerTopic.replaceAll("/app/", "").replaceAll("/to_server", "")}";
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publishBinary(topic, gzipBytes!);
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}
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void _startBootstrapReconnectTimer() {
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connectionState = ConnectionStateEnum.notConnected;
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if (!_disconnectInProgress) {
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Util.logInfo("_startReconnectTimer called");
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_reconnectDelay = min(_reconnectDelay + 1, 30);
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_reconnectTimer = Timer(Duration(seconds: _reconnectDelay), () {
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_processBootstrap();
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});
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}
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}
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void _cancelReconnectTimer() {
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if (_reconnectTimer != null && _reconnectTimer!.isActive) {
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_reconnectTimer!.cancel();
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}
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}
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void _clientDisconnected() {
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Util.logInfo("_clientDisconnected called");
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connectionState = ConnectionStateEnum.notConnected;
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_startTrackTimer();
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MessageService().publish<ConnectionStatus>(Constants.messageTopicConnectionStatusChanged, arguments: ConnectionStatus(status: ConnectionStatusEnum.notConnected));
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}
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void _clientConnected() {
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Util.logInfo("_clientDisconnected called");
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connectionState = ConnectionStateEnum.connected;
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_initSession();
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MessageService().publish<ConnectionStatus>(Constants.messageTopicConnectionStatusChanged, arguments: ConnectionStatus(status: ConnectionStatusEnum.connected));
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}
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void _processBootstrap() async {
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try {
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var deviceInfoPlugin = DeviceInfoPlugin();
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AndroidDeviceInfo androidInfo = await deviceInfoPlugin.androidInfo;
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BaseDeviceInfo deviceInfo = await deviceInfoPlugin.deviceInfo;
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var deviceObject = DeviceObject();
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deviceObject.manufacturer = deviceInfo.data['manufacturer'];
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deviceObject.model = deviceInfo.data['model'];
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deviceObject.os = androidInfo.version.release;
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deviceObject.osVer = androidInfo.version.sdkInt.toString();
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var handshakeMessage = BootstrapRequest();
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handshakeMessage.app = "sb";
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handshakeMessage.mqttClientId = await Util.getAppUuid();
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handshakeMessage.deviceObject = deviceObject;
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handshakeMessage.ver = await Util.getAppVersion();
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var jsonMap = handshakeMessage.toJson();
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var json = Uri.encodeFull(jsonEncode(jsonMap));
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var uri = "https://test-app-server.assecutor.org/bootstrap?json=$json";
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Util.logInfo("Bootstrap request: $uri");
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var response = await http.get(Uri.parse(uri));
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var responseText = response.body;
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var bootstrapResponsePayload = BootstrapResponse.fromJson(jsonDecode(responseText));
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var brokerUriAndPortArray = bootstrapResponsePayload.broker.replaceFirst("mqtt://", "").split(":");
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_brokerUri = brokerUriAndPortArray[0];
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_brokerPort = int.parse(brokerUriAndPortArray[1]);
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_clientId = bootstrapResponsePayload.id;
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_fromServerTopic = bootstrapResponsePayload.fromServer;
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_toServerTopic = bootstrapResponsePayload.toServer;
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_connectToBroker();
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} catch (ex) {
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Util.logException("bootstrap failed");
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_startBootstrapReconnectTimer();
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}
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}
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_initSession() {
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var startSessionMessage = StartSessionMessage();
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var jsonMap = startSessionMessage.toJson();
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var json = jsonEncode(jsonMap);
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publishText("session", json);
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}
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_sendSyncMessage() async
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{
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var jobs = await MyApp.isarInstance.jobs.filter().stateGreaterThan(-1).findAll();
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var answer = SyncJobsMessage();
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answer.utcUnixTime = DateTime.now().toUtc().millisecondsSinceEpoch ~/ 1000;
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answer.sync = SyncJobMessageSync();
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answer.sync.jobs = [];
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for (var job in jobs) {
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SyncJobMessageJob syncJob = SyncJobMessageJob();
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syncJob.state = job.state;
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syncJob.id = job.id;
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syncJob.ver = job.ver.toString();
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answer.sync.jobs.add(syncJob);
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}
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publishPayloadMessage("sync_request_response", jsonEncode(answer.toJson()));
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}
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void _startTrackTimer() {
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_trackTimer ??= Timer.periodic(const Duration(seconds: 60), (Timer t) {
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var position = MyApp.currentPosition;
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if (position != null) {
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var trackMessage = TrackMessage();
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trackMessage.pos = TrackPosition();
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trackMessage.pos!.time = position.timestamp.toIso8601String();
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trackMessage.pos!.lat = position.latitude;
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trackMessage.pos!.long = position.longitude;
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trackMessage.pos!.acc = position.accuracy.toInt();
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publishMessage("track", jsonEncode(trackMessage.toJson()));
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}
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});
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}
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void _cancelTrackTimer() {
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if (_trackTimer != null && _trackTimer!.isActive) {
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_trackTimer!.cancel();
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_trackTimer = null;
|
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}
|
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}
|
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|
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void _enqueueMessage(String receiver, String payload) async {
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var enqueuedMessage = EnqueuedMessage();
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enqueuedMessage.topic = receiver;
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enqueuedMessage.payload = payload;
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.enqueuedMessages.put(enqueuedMessage);
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});
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}
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_sendEnqueuedMessages() async {
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var enqueuedMessages = await MyApp.isarInstance.enqueuedMessages.where().findAll();
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if (enqueuedMessages.isNotEmpty) {
|
|
for (var enqueuedMessage in enqueuedMessages) {
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try {
|
|
publishMessage(enqueuedMessage.topic, enqueuedMessage.payload);
|
|
|
|
await MyApp.isarInstance.writeTxn(() async {
|
|
await MyApp.isarInstance.enqueuedMessages.delete(enqueuedMessage.id);
|
|
});
|
|
} catch (ex) {
|
|
Util.logInfo("resend enqueued message failed: $ex");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void _acknowlegdeJob(Job job) {
|
|
var message = AcknowledgeJob();
|
|
message.received = AcknowledgeJobReceived();
|
|
message.received.id = job.id;
|
|
message.received.state = job.state;
|
|
message.received.ver = job.ver;
|
|
message.received.utc = DateTime.now().millisecondsSinceEpoch;
|
|
|
|
publishPayloadMessage('job', message.toJson());
|
|
}
|
|
|
|
void initMessages() {
|
|
MessageService().subscribe<PublishPayloadMessage>(Constants.messageTopicPublishPayload, this, (PublishPayloadMessage payloadMessage) {
|
|
publishPayloadMessage(payloadMessage.topic, payloadMessage.message);
|
|
});
|
|
|
|
MessageService().subscribe<DisconnectClientMessage>(Constants.messageTopicDisconnectClient, this, (DisconnectClientMessage disconnectClientMessage) {
|
|
_disconnect();
|
|
});
|
|
|
|
MessageService().subscribe<ConnectClientMessage>(Constants.messageTopicConnectClient, this, (ConnectClientMessage connectClientMessage) {
|
|
_connectToBroker();
|
|
});
|
|
|
|
MessageService().subscribe<RequestConnectionStatusMessage>(Constants.messageTopicRequestConnectionStatus, this, (RequestConnectionStatusMessage requestConnectionStatusMessage) {
|
|
bool connected = false;
|
|
if (_mqttClient != null && _mqttClient!.connectionStatus != null) {
|
|
if (_mqttClient!.connectionStatus!.state == MqttConnectionState.connected) {
|
|
connected = true;
|
|
}
|
|
}
|
|
|
|
MessageService().publish<CurrentConnectionStatusMessage>(Constants.messageTopicCurrentConnectionStatus, arguments: CurrentConnectionStatusMessage(state: connected));
|
|
});
|
|
}
|
|
}
|