742 lines
23 KiB
Dart
742 lines
23 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:dart_mq/dart_mq.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:mqtt5_client/mqtt5_client.dart';
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import 'package:mqtt5_client/mqtt5_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/chat_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/model/status.dart';
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import 'package:stadtbote/network_messages/acknowledge_job.dart';
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import 'package:stadtbote/network_messages/acknowledge_message.dart';
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import 'package:stadtbote/network_messages/bootstrap_request.dart';
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import 'package:stadtbote/network_messages/bootstrap_response_payload.dart';
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import 'package:stadtbote/network_messages/connection_lost_message.dart';
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import 'package:stadtbote/network_messages/device_log_request.dart';
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import 'package:stadtbote/network_messages/device_log_response.dart';
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import 'package:stadtbote/network_messages/device_object.dart';
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import 'package:stadtbote/network_messages/job_del_message.dart';
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import 'package:stadtbote/network_messages/start_session_message.dart';
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import 'package:stadtbote/network_messages/status_info_update.dart';
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import 'package:stadtbote/network_messages/sync_jobs_message.dart';
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import 'package:stadtbote/network_messages/track_message.dart';
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import 'package:stadtbote/tools/connection_status.dart';
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import 'package:stadtbote/tools/message_header.dart';
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import 'package:stadtbote/tools/messages/publish_payload_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/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/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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// ignore: unused_import
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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 'messages/bwv_message.dart';
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import 'util.dart';
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enum ConnectionStateEnum { notConnected, connected }
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class MqttCore with ProducerMixin, ConsumerMixin {
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static late MqttCore instance;
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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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instance = this;
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initMessages();
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_disconnectInProgress = false;
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_processBootstrap();
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}
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ConnectionStateEnum getConnectionStatus() {
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return connectionState;
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}
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_disconnectMqttClient() async {
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sendMessage(
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routingKey: Constants.messageTopicConnectionStatusChanged,
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payload: ConnectionStatus(status: ConnectionStatusEnum.notConnected),
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);
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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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_mqttClient = null;
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}
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connectionState = ConnectionStateEnum.notConnected;
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_disconnectInProgress = false;
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}
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_connectToBroker() async {
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try {
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String clientId = 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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if (_mqttClient == null) {
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_mqttClient = MqttServerClient.withPort(_brokerUri, clientId, _brokerPort);
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_mqttClient!.logging(on: false);
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_mqttClient!.keepAlivePeriod = 60;
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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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var willProperties = MqttWillProperties();
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willProperties.messageExpiryInterval = 3600;
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willProperties.willDelayInterval = 0;
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var connectionLostMessage = ConnectionLostMessage();
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connectionLostMessage.connectionLost = true;
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var connectionLostEncapsulatedMessage = _encapsulateMessage(const Uuid().v4(), false, connectionLostMessage.toJson());
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var willMessageUtf8 = utf8.encode(connectionLostEncapsulatedMessage);
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Uint8Buffer uint8Buffer = Uint8Buffer();
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uint8Buffer.addAll(willMessageUtf8);
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_mqttClient!.connectionMessage = MqttConnectMessage()
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.withClientIdentifier(Util.getAppUuid())
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.authenticateAs("app", "apppwd")
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.withSessionExpiryInterval(2700)
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.withWillProperties(willProperties)
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.withWillTopic("$_toServerTopic$_clientId/connection_lost")
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.withWillQos(MqttQos.atMostOnce)
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.keepAliveFor(60)
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.withWillPayload(uint8Buffer)
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.will();
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}
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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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await _setupMqtt();
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await _initSession();
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} else {
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Util.logInfo('Verbindung zum MQTT-Broker fehlgeschlagen!');
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sendMessage(
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routingKey: Constants.messageTopicConnectionStatusChanged,
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payload: ConnectionStatus(status: ConnectionStatusEnum.notConnected),
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);
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}
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} catch (ex) {
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Util.logInfo('Verbindung zum MQTT-Broker fehlgeschlagen!: $ex');
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sendMessage(
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routingKey: Constants.messageTopicConnectionStatusChanged,
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payload: ConnectionStatus(status: ConnectionStatusEnum.notConnected),
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);
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}
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}
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bool _publishMessage(String topic, Map<String, dynamic> message, bool acknowledgeRequired, {bool enqueueOnError = true}) {
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try {
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String messageId = const Uuid().v4();
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String messageText = jsonEncode(message);
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if (acknowledgeRequired) {
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_enqueueMessage(messageId, topic, messageText);
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}
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var encapsulatedMessageText = _encapsulateMessage(messageId, acknowledgeRequired, message);
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var buffer = Uint8Buffer();
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buffer.addAll(GZipEncoder().encode(const Utf8Encoder().convert(encapsulatedMessageText)) as Iterable<int>);
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var messageTopic = "$_toServerTopic$_clientId/$topic";
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_mqttClient!.publishMessage(messageTopic, MqttQos.atMostOnce, buffer);
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Util.logInfo("message\n$encapsulatedMessageText\nsend to $messageTopic");
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Util.logInfo("size in bytes: ${buffer.length}");
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return true;
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} catch (ex) {
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Util.logInfo("send failed!");
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}
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return false;
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}
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Future<void> _setupMqtt() async {
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Util.logInfo('_setupMqtt called');
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_mqttClient!.updates.listen((List<MqttReceivedMessage<MqttMessage>> messages) {
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for (var mqttMessage in messages) {
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try {
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final MqttPublishMessage message = mqttMessage.payload as MqttPublishMessage;
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var topicArray = message.variableHeader?.topicName;
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var topicArraySplited = topicArray!.split("/");
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var topic = topicArraySplited[7];
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Util.logInfo('message received\ntopic: $topic\n');
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Util.logInfo("size in bytes: ${message.payload.message!.length.toString()}");
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var decompressedPayload = utf8.decode(GZipDecoder().decodeBytes(message.payload.message!));
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var headerMessage = MessageHeader.fromJson(jsonDecode(decompressedPayload));
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Util.logInfo('$topic\nmessageId: ${headerMessage.messageId}');
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var payloadString = jsonEncode(headerMessage.payload);
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Util.logInfo('$topic\nplayloadString: $payloadString');
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switch (topic) {
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case 'session':
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_sessionMessageReceived(jsonDecode(payloadString));
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break;
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case 'status':
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_statusMessageReceived(jsonDecode(payloadString));
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break;
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case 'ranking':
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_rankingMessageReceived(jsonDecode(payloadString));
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break;
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case 'job':
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_jobMessageReceived(jsonDecode(payloadString));
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break;
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case 'job_del':
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_jobDeleteReceived(jsonDecode(payloadString));
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break;
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case 'sync_request':
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_syncRequestReceived(jsonDecode(payloadString));
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break;
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case 'location_status':
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_locationStatusMessageReceived(jsonDecode(payloadString));
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break;
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case "mssg":
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_messageMessageReceived(jsonDecode(payloadString));
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break;
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case "upload_device_log":
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_messageUploadDeviceLogReceived(jsonDecode(payloadString));
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break;
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case "acknowledge":
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_messageAcknowledgeReceived(jsonDecode(payloadString));
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break;
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default:
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Util.logInfo('Unknown topic: $topic');
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break;
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}
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} catch (ex) {
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Util.logException(ex.toString());
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}
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}
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});
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var fromServerTopic = "$_fromServerTopic$_clientId/#";
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if (Util.preferencesContainsKey(Constants.prefsPreviousMqttSubscription)) {
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String previousMqttSubscription = 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!.unsubscribeStringTopic(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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sendMessage(
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routingKey: Constants.messageTopicConnectionStatusChanged,
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payload: ConnectionStatus(status: ConnectionStatusEnum.connected),
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);
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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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var bwvEnabled = sessionStatusMessage.bwvEnabled;
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Util.preferencesSaveBool(Constants.prefsBWVEnabled, bwvEnabled);
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sendMessage(
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routingKey: Constants.messageTopicBWVEnabled,
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payload: BWVMessage(bwvEnabled: bwvEnabled),
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);
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sendMessage(
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routingKey: Constants.messageTopicSessionStatusInfoUpdate,
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payload: SessionStatusInfoUpdate(status: sessionStatusMessage),
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);
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_startTrackTimer();
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}
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void _statusMessageReceived(payloadData) async {
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var statusMessage = Status.fromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.status.clear();
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await MyApp.isarInstance.status.put(statusMessage);
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});
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// TODO MESSAGING
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sendMessage(
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routingKey: Constants.messageTopicStatusInfoUpdated,
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payload: StatusInfoUpdate(status: statusMessage),
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);
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//await MessageService().publish<StatusInfoUpdate>(Constants.messageTopicStatusInfoUpdated, arguments: StatusInfoUpdate(status: statusMessage));
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}
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void _locationStatusMessageReceived(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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// TODO MESSAGING
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sendMessage(
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routingKey: Constants.messageTopicLocationStatusUpdated,
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payload: LocationStatusUpdate(status: locationStatus),
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);
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// await 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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// TODO MESSAGING
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sendMessage(
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routingKey: Constants.messageTopicRankingUpdated,
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payload: RankingUpdated(),
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);
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//await 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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sendMessage(
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routingKey: Constants.messageTopicJobReceived,
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payload: JobReceivedMessage(job: newJob),
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);
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}
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void _jobDeleteReceived(payloadData) async {
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var jobDelMessage = JobDelMessage.fromJson(payloadData);
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var job = await MyApp.isarInstance.jobs.where().filter().idEqualTo(jobDelMessage.id).findFirst();
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.jobs.where().filter().idEqualTo(jobDelMessage.id).deleteAll();
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});
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if (job != null) {
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sendMessage(
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routingKey: Constants.messageTopicJobDeleted,
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payload: JobDeletedMessage(job: job),
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);
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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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await _sendEnqueuedMessages();
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await _sendSyncMessage();
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}
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void _messageMessageReceived(Map<String, dynamic> payloadData) async {
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var newMessage = await ChatMessage.mergeFromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.chatMessages.put(newMessage);
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});
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await Util.playMp3('asbeep.mp3');
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sendMessage(
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routingKey: Constants.messageTopicMessageReceived,
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payload: MessageReceivedMessage(message: newMessage),
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);
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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
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.filter()
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.timeGreaterThan(deviceLogRequest.startDateTime)
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.timeLessThan(deviceLogRequest.endDateTime)
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.findAll();
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var deviceLog = DeviceLogResponse();
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deviceLog.entries = logEintries;
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_publishMessage("device_log", deviceLog.toJson(), false);
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}
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void _messageAcknowledgeReceived(payloadData) async {
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var acknowledgeMessage = AcknowledgeMessage.fromJson(payloadData);
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await MyApp.isarInstance.writeTxn(() async {
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await MyApp.isarInstance.enqueuedMessages
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.filter()
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.messageIdEqualTo(acknowledgeMessage.messageId)
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.deleteAll();
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});
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}
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|
|
|
|
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void _startReconnectTimer() {
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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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|
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void _cancelReconnectTimer() {
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if (!_disconnectInProgress) {
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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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}
|
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|
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Future<void> _clientDisconnected() async {
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Util.logInfo("_clientDisconnected called");
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connectionState = ConnectionStateEnum.notConnected;
|
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|
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_cancelTrackTimer();
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sendMessage(
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routingKey: Constants.messageTopicConnectionStatusChanged,
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payload: ConnectionStatus(status: ConnectionStatusEnum.notConnected),
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);
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}
|
|
|
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Future<void> _clientConnected() async {
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Util.logInfo("_clientConnected called");
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|
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connectionState = ConnectionStateEnum.connected;
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|
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_initSession();
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|
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sendMessage(
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routingKey: Constants.messageTopicConnectionStatusChanged,
|
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payload: ConnectionStatus(status: ConnectionStatusEnum.connected),
|
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);
|
|
}
|
|
|
|
void _processBootstrap() async {
|
|
try {
|
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var deviceInfoPlugin = DeviceInfoPlugin();
|
|
|
|
AndroidDeviceInfo androidInfo = await deviceInfoPlugin.androidInfo;
|
|
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";
|
|
handshakeMessage.mqttClientId = 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();
|
|
var json = Uri.encodeFull(jsonEncode(jsonMap));
|
|
var uri = "https://bootstrap.assecutor.de/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;
|
|
Util.logInfo("Bootstrap response: $responseText");
|
|
|
|
var bootstrapResponsePayload = BootstrapResponse.fromJson(jsonDecode(responseText));
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|
|
|
var status = bootstrapResponsePayload.status;
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|
var message = bootstrapResponsePayload.message;
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|
|
|
if (status > 0) {
|
|
showAlertDialog(status == 1 ? "Information" : "Fehler", message);
|
|
}
|
|
|
|
if (status < 2) {
|
|
var brokerUriAndPortArray = bootstrapResponsePayload.broker.replaceFirst("mqtt://", "").split(":");
|
|
_brokerUri = brokerUriAndPortArray[0];
|
|
_brokerPort = int.parse(brokerUriAndPortArray[1]);
|
|
_clientId = bootstrapResponsePayload.id;
|
|
_fromServerTopic = bootstrapResponsePayload.fromServer;
|
|
_toServerTopic = bootstrapResponsePayload.toServer;
|
|
|
|
_connectToBroker();
|
|
}
|
|
} catch (ex) {
|
|
Util.logException("bootstrap failed: {$ex}");
|
|
|
|
_startReconnectTimer();
|
|
}
|
|
}
|
|
|
|
_initSession() async {
|
|
var startSessionMessage = StartSessionMessage();
|
|
startSessionMessage.desiredZip = (Util.preferencesGetString(Constants.prefsDesiredZip, ""))!;
|
|
|
|
var jsonMap = startSessionMessage.toJson();
|
|
|
|
_publishMessage("session", jsonMap, false);
|
|
}
|
|
|
|
_sendSyncMessage() async {
|
|
var currentPosition = await MyApp.getCurrentPosition();
|
|
|
|
var jobs = await MyApp.isarInstance.jobs.filter().stateGreaterThan(-1).findAll();
|
|
|
|
var answer = SyncJobsMessage();
|
|
answer.utcUnixTime = DateTime.now().toUtc().millisecondsSinceEpoch ~/ 1000;
|
|
|
|
answer.pos = SyncMessagePos();
|
|
answer.pos!.lat = currentPosition != null ? currentPosition.latitude : 0.0;
|
|
answer.pos!.long = currentPosition != null ? currentPosition.longitude : 0.0;
|
|
answer.pos!.acc = currentPosition != null ? currentPosition.accuracy.toInt() : 0;
|
|
|
|
answer.sync = SyncJobMessageSync();
|
|
answer.sync.jobs = [];
|
|
for (var job in jobs) {
|
|
SyncJobMessageJob syncJob = SyncJobMessageJob();
|
|
syncJob.state = job.state;
|
|
syncJob.id = job.id;
|
|
syncJob.ver = job.ver.toString();
|
|
answer.sync.jobs.add(syncJob);
|
|
}
|
|
|
|
_publishMessage("sync", answer.toJson(), false);
|
|
}
|
|
|
|
void _startTrackTimer() {
|
|
_cancelTrackTimer();
|
|
|
|
_trackTimer ??= Timer.periodic(const Duration(seconds: 120), (Timer t) async {
|
|
try {
|
|
var position = await MyApp.getCurrentPosition();
|
|
if (position != null) {
|
|
var trackMessage = TrackPosition();
|
|
trackMessage.time = position.timestamp.toIso8601String();
|
|
trackMessage.lat = position.latitude;
|
|
trackMessage.long = position.longitude;
|
|
trackMessage.acc = position.accuracy.toInt();
|
|
|
|
_publishMessage("track", trackMessage.toJson(), false);
|
|
}
|
|
} catch (ex) {
|
|
Util.logException("Error in periodic track timer: {$ex}");
|
|
}
|
|
});
|
|
}
|
|
|
|
void _cancelTrackTimer() {
|
|
if (_trackTimer != null) {
|
|
if (_trackTimer!.isActive) {
|
|
_trackTimer!.cancel();
|
|
}
|
|
|
|
_trackTimer = null;
|
|
}
|
|
}
|
|
|
|
void _enqueueMessage(String uuid, String receiver, String payload) async {
|
|
var enqueuedMessage = EnqueuedMessage(messageId: uuid);
|
|
enqueuedMessage.topic = receiver;
|
|
enqueuedMessage.payload = payload;
|
|
|
|
await MyApp.isarInstance.writeTxn(() async {
|
|
await MyApp.isarInstance.enqueuedMessages.put(enqueuedMessage);
|
|
});
|
|
}
|
|
|
|
_sendEnqueuedMessages() async {
|
|
var enqueuedMessages = await MyApp.isarInstance.enqueuedMessages.where().findAll();
|
|
if (enqueuedMessages.isNotEmpty) {
|
|
for (var enqueuedMessage in enqueuedMessages) {
|
|
try {
|
|
var json = jsonDecode(enqueuedMessage.payload);
|
|
|
|
if (_publishMessage(enqueuedMessage.topic, json, false, enqueueOnError: false)) {
|
|
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 = AcknowledgeJobReceived();
|
|
message.id = job.id;
|
|
message.state = job.state;
|
|
message.ver = job.ver;
|
|
message.utc = DateTime.now().millisecondsSinceEpoch;
|
|
|
|
_publishMessage('job_received', message.toJson(), false);
|
|
}
|
|
|
|
void initMessages() {
|
|
subscribe(
|
|
queueId: Constants.messageTopicPublishPayload,
|
|
callback: (message) {
|
|
var publishPayloadMessage = message.payload as PublishPayloadMessage;
|
|
|
|
_publishMessage(publishPayloadMessage.topic, publishPayloadMessage.message, publishPayloadMessage.acknowledgeRequired);
|
|
},
|
|
);
|
|
|
|
subscribe(
|
|
queueId: Constants.messageTopicDisconnectClient,
|
|
callback: (message) {
|
|
_disconnectMqttClient();
|
|
},
|
|
);
|
|
|
|
subscribe(
|
|
queueId: Constants.messageTopicConnectClient,
|
|
callback: (message) {
|
|
_connectToBroker();
|
|
},
|
|
);
|
|
|
|
subscribe(
|
|
queueId: Constants.messageTopicRequestConnectionStatus,
|
|
callback: (message) {
|
|
bool connected = false;
|
|
if (_mqttClient != null && _mqttClient!.connectionStatus != null) {
|
|
if (_mqttClient!.connectionStatus!.state == MqttConnectionState.connected) {
|
|
connected = true;
|
|
}
|
|
}
|
|
|
|
sendMessage(
|
|
routingKey: Constants.messageTopicCurrentConnectionStatus,
|
|
payload: CurrentConnectionStatusMessage(state: connected),
|
|
);
|
|
},
|
|
);
|
|
}
|
|
|
|
String _encapsulateMessage(String messageId, bool requiresAck, Map<String, dynamic> message) {
|
|
var messageHeader = MessageHeader();
|
|
messageHeader.messageId = messageId;
|
|
messageHeader.requiresAck = requiresAck;
|
|
messageHeader.payload = message;
|
|
|
|
var encapsulatedMessageText = jsonEncode(messageHeader.toJson());
|
|
|
|
return encapsulatedMessageText;
|
|
}
|
|
}
|