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| | import 'dart:async';
| | import 'dart:convert';
| | import 'dart:io';
| |
| | import 'package:flutter/widgets.dart';
| | import 'package:path_provider/path_provider.dart' as pp;
| | import 'package:mqtt_client/mqtt_client.dart';
| | import 'package:mqtt_client/mqtt_server_client.dart';
| | import 'package:shared_preferences/shared_preferences.dart';
| | import 'package:uuid/uuid.dart';
| |
| | import '../models/server_config.dart';
| | import 'wol_service.dart';
| |
| | /// Connection status for the MQTT client.
| | enum ConnectionStatus {
| | disconnected,
| | connecting,
| | connected,
| | reconnecting,
| | }
| |
| | // Debug log to file (survives release builds)
| | Future<void> _mqttLog(String msg) async {
| | try {
| | final dir = await pp.getApplicationDocumentsDirectory();
| | final file = File('${dir.path}/mqtt_debug.log');
| | final ts = DateTime.now().toIso8601String().substring(11, 19);
| | await file.writeAsString('[$ts] $msg\n', mode: FileMode.append);
| | } catch (_) {}
| | }
| |
| | /// MQTT client for PAILot.
| | ///
| | /// Connects to the AIBroker daemon's embedded aedes broker.
| | /// Subscribes to all pailot/ topics and dispatches messages
| | /// through the onMessage callback interface.
| | class MqttService with WidgetsBindingObserver {
| | MqttService({required this.config});
| |
| | ServerConfig config;
| | MqttServerClient? _client;
| | ConnectionStatus _status = ConnectionStatus.disconnected;
| | bool _intentionalClose = false;
| | String? _clientId;
| | StreamSubscription? _updatesSub;
| |
| | // Message deduplication
| | final Set<String> _seenMsgIds = {};
| | final List<String> _seenMsgIdOrder = [];
| | static const int _maxSeenIds = 500;
| |
| | // Callbacks
| | void Function(ConnectionStatus status)? onStatusChanged;
| | void Function(Map<String, dynamic> message)? onMessage;
| | void Function()? onOpen;
| | void Function()? onClose;
| | void Function()? onReconnecting;
| | void Function()? onResume;
| | void Function(String error)? onError;
| |
| | ConnectionStatus get status => _status;
| | bool get isConnected => _status == ConnectionStatus.connected;
| |
| | void _setStatus(ConnectionStatus newStatus) {
| | if (_status == newStatus) return;
| | _status = newStatus;
| | onStatusChanged?.call(newStatus);
| | }
| |
| | /// Get or create a persistent client ID for this device.
| | Future<String> _getClientId() async {
| | if (_clientId != null) return _clientId!;
| | final prefs = await SharedPreferences.getInstance();
| | var id = prefs.getString('mqtt_client_id');
| | // Regenerate if old format (too long for MQTT 3.1.1)
| | if (id == null || id.length > 23) {
| | // MQTT 3.1.1 client IDs: max 23 chars, alphanumeric
| | id = 'pailot${const Uuid().v4().replaceAll('-', '').substring(0, 16)}';
| | await prefs.setString('mqtt_client_id', id);
| | }
| | _clientId = id;
| | return id;
| | }
| |
| | /// Connect to the MQTT broker.
| | /// Tries local host first (2.5s timeout), then remote host.
| | Future<void> connect() async {
| | if (_status == ConnectionStatus.connected ||
| | _status == ConnectionStatus.connecting) {
| | return;
| | }
| |
| | _intentionalClose = false;
| | _setStatus(ConnectionStatus.connecting);
| |
| | // Send Wake-on-LAN if MAC configured
| | if (config.macAddress != null && config.macAddress!.isNotEmpty) {
| | try {
| | await WolService.wake(config.macAddress!, localHost: config.localHost);
| | } catch (_) {}
| | }
| |
| | final clientId = await _getClientId();
| | final hosts = _getHosts();
| | _mqttLog('MQTT: hosts=${hosts.join(", ")} port=${config.port}');
| |
| | for (final host in hosts) {
| | if (_intentionalClose) return;
| |
| | _mqttLog('MQTT: trying $host:${config.port}');
| | try {
| | final connected = await _tryConnect(
| | host,
| | clientId,
| | timeout: host == hosts.first && hosts.length > 1 ? 2500 : 5000,
| | );
| | _mqttLog('MQTT: $host result=$connected');
| | if (connected) return;
| | } catch (e) {
| | _mqttLog('MQTT: $host error=$e');
| | continue;
| | }
| | }
| |
| | // All hosts failed — retry after delay
| | _mqttLog('MQTT: all hosts failed, retrying in 5s');
| | _setStatus(ConnectionStatus.reconnecting);
| | Future.delayed(const Duration(seconds: 5), () {
| | if (!_intentionalClose && _status != ConnectionStatus.connected) {
| | connect();
| | }
| | });
| | }
| |
| | /// Returns [localHost, remoteHost] for dual-connect attempts.
| | List<String> _getHosts() {
| | if (config.localHost != null &&
| | config.localHost!.isNotEmpty &&
| | config.localHost != config.host) {
| | return [config.localHost!, config.host];
| | }
| | return [config.host];
| | }
| |
| | Future<bool> _tryConnect(String host, String clientId, {int timeout = 5000}) async {
| | try {
| | final client = MqttServerClient.withPort(host, clientId, config.port);
| | client.keepAlivePeriod = 30;
| | client.autoReconnect = false; // Don't auto-reconnect during trial — enable after success
| | client.connectTimeoutPeriod = timeout;
| | // client.maxConnectionAttempts is final — can't set it
| | client.logging(on: false);
| |
| | client.onConnected = _onConnected;
| | client.onDisconnected = _onDisconnected;
| | client.onAutoReconnect = _onAutoReconnect;
| | client.onAutoReconnected = _onAutoReconnected;
| |
| | // Clean session: we handle offline delivery ourselves via catch_up protocol.
| | // Persistent sessions cause the broker to flood all queued QoS 1 messages
| | // on reconnect, which overwhelms the client with large voice payloads.
| | final connMessage = MqttConnectMessage()
| | .withClientIdentifier(clientId)
| | .startClean()
| | .authenticateAs('pailot', config.mqttToken ?? '');
| |
| | client.connectionMessage = connMessage;
| |
| | // Set _client BEFORE connect() so _onConnected can subscribe
| | _client = client;
| |
| | _mqttLog('MQTT: connecting to $host:${config.port} as $clientId (timeout=${timeout}ms)');
| | final result = await client.connect().timeout(
| | Duration(milliseconds: timeout + 1000),
| | onTimeout: () {
| | _mqttLog('MQTT: connect timed out for $host');
| | return null;
| | },
| | );
| | _mqttLog('MQTT: connect result=${result?.state}');
| | if (result?.state == MqttConnectionState.connected) {
| | client.autoReconnect = true; // Now enable auto-reconnect for the live connection
| | return true;
| | }
| | _client = null;
| | client.disconnect();
| | return false;
| | } catch (e) {
| | _mqttLog('MQTT: connect exception=$e');
| | return false;
| | }
| | }
| |
| | void _onConnected() {
| | _mqttLog('MQTT: _onConnected fired');
| | _setStatus(ConnectionStatus.connected);
| | _subscribe();
| | _listenMessages();
| | onOpen?.call();
| | }
| |
| | void _onDisconnected() {
| | _updatesSub?.cancel();
| | _updatesSub = null;
| |
| | if (_intentionalClose) {
| | _setStatus(ConnectionStatus.disconnected);
| | onClose?.call();
| | } else {
| | _setStatus(ConnectionStatus.reconnecting);
| | onReconnecting?.call();
| | }
| | }
| |
| | void _onAutoReconnect() {
| | _setStatus(ConnectionStatus.reconnecting);
| | onReconnecting?.call();
| | }
| |
| | void _onAutoReconnected() {
| | _setStatus(ConnectionStatus.connected);
| | _subscribe();
| | _listenMessages();
| | onOpen?.call();
| | }
| |
| | void _subscribe() {
| | final client = _client;
| | if (client == null) {
| | _mqttLog('MQTT: _subscribe called but client is null');
| | return;
| | }
| | _mqttLog('MQTT: subscribing to topics...');
| | client.subscribe('pailot/sessions', MqttQos.atLeastOnce);
| | client.subscribe('pailot/status', MqttQos.atLeastOnce);
| | client.subscribe('pailot/projects', MqttQos.atLeastOnce);
| | client.subscribe('pailot/+/out', MqttQos.atLeastOnce);
| | client.subscribe('pailot/+/typing', MqttQos.atMostOnce);
| | client.subscribe('pailot/+/screenshot', MqttQos.atLeastOnce);
| | client.subscribe('pailot/control/out', MqttQos.atLeastOnce);
| | client.subscribe('pailot/voice/transcript', MqttQos.atLeastOnce);
| | }
| |
| | void _listenMessages() {
| | _updatesSub?.cancel();
| | _updatesSub = _client?.updates?.listen(_onMqttMessage);
| | }
| |
| | void _onMqttMessage(List<MqttReceivedMessage<MqttMessage>> messages) {
| | _mqttLog('MQTT: received ${messages.length} message(s)');
| | for (final msg in messages) {
| | _mqttLog('MQTT: topic=${msg.topic}');
| | final pubMsg = msg.payload as MqttPublishMessage;
| | final payload = MqttPublishPayload.bytesToStringAsString(
| | pubMsg.payload.message,
| | );
| |
| | Map<String, dynamic> json;
| | try {
| | json = jsonDecode(payload) as Map<String, dynamic>;
| | } catch (_) {
| | continue; // Skip non-JSON
| | }
| |
| | // Dedup by msgId
| | final msgId = json['msgId'] as String?;
| | if (msgId != null) {
| | if (_seenMsgIds.contains(msgId)) continue;
| | _seenMsgIds.add(msgId);
| | _seenMsgIdOrder.add(msgId);
| | _evictOldIds();
| | }
| |
| | // Dispatch: parse topic to enrich the message with routing info
| | _dispatchMessage(msg.topic, json);
| | }
| | }
| |
| | /// Route incoming MQTT messages to the onMessage callback.
| | /// Translates MQTT topic structure into the flat message format
| | /// that chat_screen expects.
| | void _dispatchMessage(String topic, Map<String, dynamic> json) {
| | final parts = topic.split('/');
| |
| | // pailot/sessions
| | if (topic == 'pailot/sessions') {
| | json['type'] = 'sessions';
| | onMessage?.call(json);
| | return;
| | }
| |
| | // pailot/status
| | if (topic == 'pailot/status') {
| | json['type'] = 'status';
| | onMessage?.call(json);
| | return;
| | }
| |
| | // pailot/projects
| | if (topic == 'pailot/projects') {
| | json['type'] = 'projects';
| | onMessage?.call(json);
| | return;
| | }
| |
| | // pailot/control/out — command responses (session_switched, session_renamed, error, unread)
| | if (topic == 'pailot/control/out') {
| | onMessage?.call(json);
| | return;
| | }
| |
| | // pailot/voice/transcript
| | if (topic == 'pailot/voice/transcript') {
| | json['type'] = 'transcript';
| | onMessage?.call(json);
| | return;
| | }
| |
| | // pailot/<sessionId>/out — text, voice, image messages
| | if (parts.length == 3 && parts[2] == 'out') {
| | final sessionId = parts[1];
| | json['sessionId'] ??= sessionId;
| | onMessage?.call(json);
| | return;
| | }
| |
| | // pailot/<sessionId>/typing
| | if (parts.length == 3 && parts[2] == 'typing') {
| | final sessionId = parts[1];
| | json['type'] = 'typing';
| | json['sessionId'] ??= sessionId;
| | // Map 'active' field to the 'typing'/'isTyping' fields chat_screen expects
| | final active = json['active'] as bool? ?? true;
| | json['typing'] = active;
| | onMessage?.call(json);
| | return;
| | }
| |
| | // pailot/<sessionId>/screenshot
| | if (parts.length == 3 && parts[2] == 'screenshot') {
| | final sessionId = parts[1];
| | json['type'] = 'screenshot';
| | json['sessionId'] ??= sessionId;
| | // Map imageBase64 to 'data' for compatibility with chat_screen handler
| | json['data'] ??= json['imageBase64'];
| | onMessage?.call(json);
| | return;
| | }
| | }
| |
| | void _evictOldIds() {
| | while (_seenMsgIdOrder.length > _maxSeenIds) {
| | final oldest = _seenMsgIdOrder.removeAt(0);
| | _seenMsgIds.remove(oldest);
| | }
| | }
| |
| | /// Generate a UUID v4 for message IDs.
| | String _uuid() => const Uuid().v4();
| |
| | /// Current timestamp in milliseconds.
| | int _now() => DateTime.now().millisecondsSinceEpoch;
| |
| | /// Publish a JSON payload to an MQTT topic.
| | void _publish(String topic, Map<String, dynamic> payload, MqttQos qos) {
| | final client = _client;
| | if (client == null || client.connectionStatus?.state != MqttConnectionState.connected) {
| | onError?.call('Not connected');
| | return;
| | }
| |
| | try {
| | final builder = MqttClientPayloadBuilder();
| | builder.addString(jsonEncode(payload));
| | client.publishMessage(topic, qos, builder.payload!);
| | } catch (e) {
| | onError?.call('Send failed: $e');
| | }
| | }
| |
| | /// Send a message — routes to the appropriate MQTT topic based on content.
| | void send(Map<String, dynamic> message) {
| | final type = message['type'] as String?;
| | final sessionId = message['sessionId'] as String?;
| |
| | if (type == 'command' || (message.containsKey('command') && type == null)) {
| | // Command messages go to pailot/control/in
| | final command = message['command'] as String? ?? '';
| | final args = message['args'] as Map<String, dynamic>? ?? {};
| | final payload = <String, dynamic>{
| | 'msgId': _uuid(),
| | 'type': 'command',
| | 'command': command,
| | 'ts': _now(),
| | ...args,
| | };
| | _publish('pailot/control/in', payload, MqttQos.atLeastOnce);
| | return;
| | }
| |
| | if (type == 'voice' && sessionId != null) {
| | // Voice message
| | _publish('pailot/$sessionId/in', {
| | 'msgId': _uuid(),
| | 'type': 'voice',
| | 'sessionId': sessionId,
| | 'audioBase64': message['audioBase64'] ?? '',
| | 'messageId': message['messageId'] ?? '',
| | 'ts': _now(),
| | }, MqttQos.atLeastOnce);
| | return;
| | }
| |
| | if (type == 'image' && sessionId != null) {
| | _publish('pailot/$sessionId/in', {
| | 'msgId': _uuid(),
| | 'type': 'image',
| | 'sessionId': sessionId,
| | 'imageBase64': message['imageBase64'] ?? '',
| | 'mimeType': message['mimeType'] ?? 'image/jpeg',
| | 'caption': message['caption'] ?? '',
| | 'ts': _now(),
| | }, MqttQos.atLeastOnce);
| | return;
| | }
| |
| | if (type == 'bundle' && sessionId != null) {
| | // Atomic multi-attachment message
| | _publish('pailot/$sessionId/in', {
| | 'msgId': _uuid(),
| | 'type': 'bundle',
| | 'sessionId': sessionId,
| | 'caption': message['caption'] ?? '',
| | if (message['audioBase64'] != null) 'audioBase64': message['audioBase64'],
| | 'attachments': message['attachments'] ?? [],
| | 'ts': _now(),
| | }, MqttQos.atLeastOnce);
| | return;
| | }
| |
| | if (type == 'file' && sessionId != null) {
| | _publish('pailot/$sessionId/in', {
| | 'msgId': _uuid(),
| | 'type': 'file',
| | 'sessionId': sessionId,
| | 'fileBase64': message['fileBase64'] ?? '',
| | 'fileName': message['fileName'] ?? 'file',
| | 'mimeType': message['mimeType'] ?? 'application/octet-stream',
| | 'fileSize': message['fileSize'] ?? 0,
| | 'ts': _now(),
| | }, MqttQos.atLeastOnce);
| | return;
| | }
| |
| | if (type == 'tts' && sessionId != null) {
| | // TTS request — route as command
| | _publish('pailot/control/in', {
| | 'msgId': _uuid(),
| | 'type': 'command',
| | 'command': 'tts',
| | 'text': message['text'] ?? '',
| | 'sessionId': sessionId,
| | 'ts': _now(),
| | }, MqttQos.atLeastOnce);
| | return;
| | }
| |
| | // Default: plain text message (content + sessionId)
| | if (sessionId != null) {
| | final content = message['content'] as String? ?? '';
| | _publish('pailot/$sessionId/in', {
| | 'msgId': _uuid(),
| | 'type': 'text',
| | 'sessionId': sessionId,
| | 'content': content,
| | 'ts': _now(),
| | }, MqttQos.atLeastOnce);
| | return;
| | }
| |
| | onError?.call('Cannot send message: missing sessionId');
| | }
| |
| | /// Disconnect intentionally.
| | void disconnect() {
| | _intentionalClose = true;
| | _updatesSub?.cancel();
| | _updatesSub = null;
| |
| | try {
| | _client?.disconnect();
| | } catch (_) {}
| | _client = null;
| |
| | _setStatus(ConnectionStatus.disconnected);
| | onClose?.call();
| | }
| |
| | /// Update config and reconnect.
| | Future<void> updateConfig(ServerConfig newConfig) async {
| | config = newConfig;
| | disconnect();
| | await Future.delayed(const Duration(milliseconds: 100));
| | await connect();
| | }
| |
| | /// Dispose all resources.
| | void dispose() {
| | disconnect();
| | }
| |
| | // App lifecycle integration
| | @override
| | void didChangeAppLifecycleState(AppLifecycleState state) {
| | switch (state) {
| | case AppLifecycleState.resumed:
| | if (_intentionalClose) break;
| | _mqttLog('MQTT: app resumed, status=$_status client=${_client != null} mqttState=${_client?.connectionStatus?.state}');
| | final client = _client;
| | if (client == null || client.connectionStatus?.state != MqttConnectionState.connected) {
| | // Clearly disconnected — just reconnect
| | _mqttLog('MQTT: not connected on resume, reconnecting...');
| | _client = null;
| | _setStatus(ConnectionStatus.reconnecting);
| | connect();
| | } else {
| | // Appears connected — notify listener to fetch missed messages
| | // via catch_up. Don't call onOpen (it resets sessionReady and causes flicker).
| | _mqttLog('MQTT: appears connected on resume, triggering catch_up');
| | onResume?.call();
| | }
| | case AppLifecycleState.paused:
| | break;
| | default:
| | break;
| | }
| | }
| | }
|
|
