Restructuration majeure du projet: migration de flutt vers app, ajout de l'API et mise à jour du site web
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d6soft
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import 'dart:async';
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import 'dart:convert';
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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:flutter/foundation.dart';
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import 'package:flutter_local_notifications/flutter_local_notifications.dart';
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/// Service de gestion des notifications chat via MQTT
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///
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/// Utilise MQTT pour recevoir des notifications en temps réel
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/// et afficher des notifications locales
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class MqttNotificationService {
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static final MqttNotificationService _instance = MqttNotificationService._internal();
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factory MqttNotificationService() => _instance;
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MqttNotificationService._internal();
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late MqttServerClient _client;
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final FlutterLocalNotificationsPlugin _localNotifications = FlutterLocalNotificationsPlugin();
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// Configuration
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final String mqttHost;
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final int mqttPort;
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final String mqttUsername;
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final String mqttPassword;
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final String clientId;
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// État
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bool _initialized = false;
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String? _userId;
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StreamSubscription? _messageSubscription;
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// Callbacks
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Function(String messageId)? onMessageTap;
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Function(Map<String, dynamic>)? onNotificationReceived;
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MqttNotificationService({
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this.mqttHost = 'mqtt.geosector.fr',
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this.mqttPort = 1883,
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this.mqttUsername = '',
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this.mqttPassword = '',
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String? clientId,
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}) : clientId = clientId ?? 'geosector_chat_${DateTime.now().millisecondsSinceEpoch}';
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/// Initialise le service de notifications
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Future<void> initialize({required String userId}) async {
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if (_initialized) return;
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_userId = userId;
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// Initialiser les notifications locales
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await _initializeLocalNotifications();
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// Initialiser le client MQTT
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await _initializeMqttClient();
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_initialized = true;
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}
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/// Initialise le client MQTT
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Future<void> _initializeMqttClient() async {
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try {
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_client = MqttServerClient.withPort(mqttHost, clientId, mqttPort);
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_client.logging(on: kDebugMode);
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_client.keepAlivePeriod = 60;
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_client.onConnected = _onConnected;
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_client.onDisconnected = _onDisconnected;
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_client.onSubscribed = _onSubscribed;
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_client.autoReconnect = true;
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// Configurer les options de connexion
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final connMessage = MqttConnectMessage()
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.authenticateAs(mqttUsername, mqttPassword)
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.withClientIdentifier(clientId)
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.startClean()
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.keepAliveFor(60);
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_client.connectionMessage = connMessage;
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// Se connecter
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await _connect();
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} catch (e) {
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debugPrint('Erreur lors de l\'initialisation MQTT : $e');
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rethrow;
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}
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}
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/// Se connecte au broker MQTT
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Future<void> _connect() async {
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try {
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await _client.connect();
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} catch (e) {
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debugPrint('Erreur de connexion MQTT : $e');
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_client.disconnect();
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rethrow;
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}
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}
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/// Callback lors de la connexion
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void _onConnected() {
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debugPrint('Connecté au broker MQTT');
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// S'abonner aux topics de l'utilisateur
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if (_userId != null) {
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_subscribeToUserTopics(_userId!);
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}
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// Écouter les messages
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_messageSubscription = _client.updates?.listen(_onMessageReceived);
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}
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/// Callback lors de la déconnexion
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void _onDisconnected() {
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debugPrint('Déconnecté du broker MQTT');
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// Tenter une reconnexion
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if (_client.autoReconnect) {
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Future.delayed(const Duration(seconds: 5), () {
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_connect();
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});
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}
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}
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/// Callback lors de l'abonnement
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void _onSubscribed(MqttSubscription subscription) {
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debugPrint('Abonné au topic : ${subscription.topic.rawTopic}');
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}
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/// S'abonner aux topics de l'utilisateur
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void _subscribeToUserTopics(String userId) {
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// Topic pour les messages personnels
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_client.subscribe('chat/user/$userId/messages', MqttQos.atLeastOnce);
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// Topic pour les annonces
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_client.subscribe('chat/announcement', MqttQos.atLeastOnce);
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// Topic pour les groupes de l'utilisateur (si disponibles)
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_client.subscribe('chat/user/$userId/groups/+', MqttQos.atLeastOnce);
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}
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/// Gère les messages reçus
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void _onMessageReceived(List<MqttReceivedMessage<MqttMessage>> messages) {
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for (var message in messages) {
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final topic = message.topic;
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final payload = message.payload as MqttPublishMessage;
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final messageText = MqttUtilities.bytesToStringAsString(payload.payload.message!);
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try {
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final data = jsonDecode(messageText) as Map<String, dynamic>;
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_handleNotification(topic, data);
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} catch (e) {
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debugPrint('Erreur lors du décodage du message : $e');
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}
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}
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}
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/// Traite la notification reçue
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Future<void> _handleNotification(String topic, Map<String, dynamic> data) async {
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// Vérifier les paramètres de notification de l'utilisateur
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if (!await _shouldShowNotification(data)) {
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return;
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}
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String title = '';
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String body = '';
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String messageId = '';
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String conversationId = '';
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if (topic.startsWith('chat/user/')) {
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// Message personnel
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title = data['senderName'] ?? 'Nouveau message';
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body = data['content'] ?? '';
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messageId = data['messageId'] ?? '';
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conversationId = data['conversationId'] ?? '';
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} else if (topic.startsWith('chat/announcement')) {
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// Annonce
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title = data['title'] ?? 'Annonce';
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body = data['content'] ?? '';
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messageId = data['messageId'] ?? '';
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conversationId = data['conversationId'] ?? '';
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}
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// Afficher la notification locale
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await _showLocalNotification(
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title: title,
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body: body,
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payload: jsonEncode({
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'messageId': messageId,
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'conversationId': conversationId,
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}),
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);
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// Appeler le callback si défini
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onNotificationReceived?.call(data);
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}
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/// Vérifie si la notification doit être affichée
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Future<bool> _shouldShowNotification(Map<String, dynamic> data) async {
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// TODO: Vérifier les paramètres de notification de l'utilisateur
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// - Notifications désactivées
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// - Conversation en silencieux
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// - Mode Ne pas déranger
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return true;
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}
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/// Initialise les notifications locales
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Future<void> _initializeLocalNotifications() async {
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const androidSettings = AndroidInitializationSettings('@mipmap/ic_launcher');
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const iosSettings = DarwinInitializationSettings(
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requestAlertPermission: true,
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requestBadgePermission: true,
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requestSoundPermission: true,
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);
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const initSettings = InitializationSettings(
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android: androidSettings,
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iOS: iosSettings,
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);
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await _localNotifications.initialize(
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initSettings,
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onDidReceiveNotificationResponse: _onNotificationTap,
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);
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}
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/// Affiche une notification locale
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Future<void> _showLocalNotification({
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required String title,
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required String body,
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required String payload,
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}) async {
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const androidDetails = AndroidNotificationDetails(
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'chat_messages',
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'Messages de chat',
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channelDescription: 'Notifications pour les nouveaux messages de chat',
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importance: Importance.high,
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priority: Priority.high,
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icon: '@mipmap/ic_launcher',
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);
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const iosDetails = DarwinNotificationDetails(
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presentAlert: true,
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presentBadge: true,
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presentSound: true,
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);
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const notificationDetails = NotificationDetails(
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android: androidDetails,
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iOS: iosDetails,
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);
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await _localNotifications.show(
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DateTime.now().microsecondsSinceEpoch,
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title,
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body,
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notificationDetails,
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payload: payload,
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);
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}
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/// Handler pour le clic sur une notification
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void _onNotificationTap(NotificationResponse response) {
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final payload = response.payload;
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if (payload != null) {
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try {
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final data = jsonDecode(payload) as Map<String, dynamic>;
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final messageId = data['messageId'] as String?;
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if (messageId != null) {
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onMessageTap?.call(messageId);
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}
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} catch (e) {
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debugPrint('Erreur lors du traitement du clic sur notification : $e');
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}
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}
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}
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/// Publie un message MQTT
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Future<void> publishMessage(String topic, Map<String, dynamic> message) async {
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if (_client.connectionStatus?.state != MqttConnectionState.connected) {
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await _connect();
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}
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final messagePayload = jsonEncode(message);
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final builder = MqttPayloadBuilder();
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builder.addString(messagePayload);
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_client.publishMessage(topic, MqttQos.atLeastOnce, builder.payload!);
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}
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/// S'abonner à une conversation spécifique
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Future<void> subscribeToConversation(String conversationId) async {
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if (_client.connectionStatus?.state == MqttConnectionState.connected) {
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_client.subscribe('chat/conversation/$conversationId', MqttQos.atLeastOnce);
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}
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}
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/// Se désabonner d'une conversation
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Future<void> unsubscribeFromConversation(String conversationId) async {
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if (_client.connectionStatus?.state == MqttConnectionState.connected) {
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_client.unsubscribeStringTopic('chat/conversation/$conversationId');
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}
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}
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/// Désactive temporairement les notifications
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void pauseNotifications() {
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_client.pause();
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}
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/// Réactive les notifications
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void resumeNotifications() {
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_client.resume();
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}
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/// Libère les ressources
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void dispose() {
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_messageSubscription?.cancel();
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_client.disconnect();
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_initialized = false;
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}
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}
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