新增多语言转换 mqtt支持websocket

lib/base/mqtt/mqtt.dart

@@ -7,8 +7,35 @@ import 'package:mqtt5_client/mqtt5_server_client.dart';
 class Mqtt {
   final MqttConfig _config;
   MqttClient? _client;
+  //标记是否自动重连
+  bool reconnect = true;
+  //缓存自定义主题订阅信息
+  Map<String, int> topicCache = {};
 
-  Mqtt(this._config);
+  Mqtt(this._config) {
+    _client = MqttServerClient.withPort(
+        _config.host,
+        "${_config.clientId}_${DateTime.now().millisecondsSinceEpoch}",
+        _config.port)
+      ..useWebSocket =
+          _config.host.startsWith("ws") || _config.host.startsWith("wss");
+    _client?.keepAlivePeriod = _config.keepAlive;
+    _client?.connectionMessage =
+        MqttConnectMessage().keepAliveFor(_config.keepAlive);
+    // _client?.autoReconnect = true;
+    _client?.onConnected = () {
+      // print("aa:mqtt服务器连接成功");
+      print("mqtt服务器: ${_config.host} 连接成功");
+    };
+    _client?.onDisconnected = () {
+      // print("aa:mqtt服务器连接断开");
+      print("mqtt服务器: ${_config.host} 连接断开");
+      //执行重连操作
+      if (reconnect) {
+        connect(reconnect: true);
+      }
+    };
+  }
 
   static late Mqtt _mqtt;
 
@@ -20,30 +47,26 @@ class Mqtt {
     _mqtt = server;
   }
 
-  Future<bool> connect() async {
-    if (_client != null) {
-      return true;
+  Future<bool> connect({bool reconnect = false}) async {
+    if (reconnect) {
+      //限制重连速率
+      await Future.delayed(Duration(seconds: 1));
+      print("mqtt服务器: ${_config.host} 尝试重连");
     }
-    _client = MqttServerClient.withPort(
-        _config.host,
-        "${_config.clientId}_${DateTime.now().millisecondsSinceEpoch}",
-        _config.port);
-    _client?.autoReconnect = true;
-
     MqttConnectionStatus? state;
     try {
       state = await _client?.connect(_config.username, _config.password);
     } catch (e) {
       //连接错误
       print("mqtt连接失败: 地址:${_config.host} 原因:$e");
-      return false;
+      return connect(reconnect: this.reconnect);
     }
-    if (state!.state != MqttConnectionState.connected) {
+    if (state == null || state.state != MqttConnectionState.connected) {
       //连接失败
-      print("mqtt连接失败: 地址:${_config.host} 原因:$state");
-      return false;
+      print("mqtt连接失败-1: 地址:${_config.host} 原因:$state");
+      return connect(reconnect: this.reconnect);
     }
-    print("mqtt服务器: ${_config.host} 连接成功");
+    // print("mqtt服务器: ${_config.host} 连接成功");
 
     _client?.updates.listen((List<MqttReceivedMessage<MqttMessage>> message) {
       final recMess = message[0].payload as MqttPublishMessage;
@@ -63,7 +86,10 @@ class Mqtt {
       }
     });
     _config.topic?.forEach((topic) {
-      subscribe(topic, _config.qos);
+      subscribe(topic, _config.qos, cache: false);
+    });
+    topicCache.forEach((t, q) {
+      subscribe(t, q, cache: false);
     });
 
     return true;
@@ -71,22 +97,33 @@ class Mqtt {
 
   void disconnect() {
     _client?.disconnect();
-    _client = null;
+    reconnect = false;
+    // _client = null;
   }
 
-  void subscribe(String topic, int qos) {
+  void subscribe(String topic, int qos, {bool cache = true}) {
+    if (cache) {
+      topicCache[topic] = qos;
+    }
     _client?.subscribe(topic, MqttUtilities.getQosLevel(qos));
   }
 
   void unSubscribe(String topic) {
+    topicCache.remove(topic);
     _client?.unsubscribeStringTopic(topic);
   }
 
-  void publish(String topic, String msg, {int qos = 0}) {
-    var payload = MqttPayloadBuilder();
-    payload.addUTF8String(msg);
-    _client?.publishMessage(
-        topic, MqttUtilities.getQosLevel(qos), payload.payload!);
+  Future<bool> publish(String topic, String msg, {int qos = 0}) async {
+    try {
+      var payload = MqttPayloadBuilder();
+      payload.addUTF8String(msg);
+      _client?.publishMessage(
+          topic, MqttUtilities.getQosLevel(qos), payload.payload!);
+      return true;
+    } catch (e) {
+      print(e);
+      return false;
+    }
   }
 }
 
@@ -97,6 +134,7 @@ class MqttConfig {
   String? username;
   String? password;
   List<String>? topic;
+  int keepAlive;
   int qos;
   //文本消息
   Function(String topic, String message)? messgae;
@@ -112,5 +150,6 @@ class MqttConfig {
       this.topic,
       this.qos = 0,
       this.username,
-      this.password});
+      this.password,
+      this.keepAlive = 60});
 }