pc-system/mqtt/mqttclient.cpp

#include "mqttclient.h"
#include <QJsonDocument>
#include <QJsonObject>


MqttClient* MqttClient::instance = nullptr;

MqttClient::MqttClient(QObject *parent)
    : QObject(parent), mqClient(new QMqttClient(this))
{
    // 连接信号和槽
    connect(mqClient, &QMqttClient::connected, this, &MqttClient::onConnected);
    // connect(mqClient, &QMqttClient::disconnected, this, &MqttClient::onDisconnected);
    connect(mqClient, &QMqttClient::stateChanged, this, &MqttClient::onStateChanged);
    connect(mqClient, &QMqttClient::errorChanged, this, &MqttClient::onError);
    connect(mqClient, &QMqttClient::messageReceived, this, &MqttClient::onMessageReceived);

    connect(mqClient, &QMqttClient::errorChanged, this, [this](QMqttClient::ClientError error) {
        qDebug() << "MQTT Error:" << error;
    });

    connect(mqClient, &QMqttClient::connected, this, &MqttClient::connected);
}

// 单例模式
MqttClient* MqttClient::getInstance()
{
    if (instance == nullptr) {
        instance = new MqttClient();
    }
    return instance;
}



MqttClient* MqttClient::createNewInstance()
{
    return new MqttClient();
}
void MqttClient::connectToMqttBroker()
{
    qDebug() << "MQTT 1511: " ;

    mqClient->setHostname("114.55.233.194");
    mqClient->setPort(1883);

    // // 设置账号和密码
    mqClient->setUsername("hxgc");
    mqClient->setPassword("hxgc123456");

    // 设置客户端 ID
    mqClient->setClientId("pc");
    mqClient->connectToHost();


}

void MqttClient::connectToMqttBroker(const QString& hostname, quint16 port, const QString& username, const QString& password, const QString& clientId,const QStringList& topicsToSubscribe)
{
    qDebug() << "MQTT 1511: " ;

    mqClient->setHostname(hostname);
    mqClient->setPort(port);

    // 设置账号和密码
    mqClient->setUsername(username);
    mqClient->setPassword(password);

    // 设置客户端 ID
    mqClient->setClientId(clientId);
    mqClient->connectToHost();
    // 保存要订阅的主题列表
    m_subscribeTopics = topicsToSubscribe;

}
void MqttClient::onConnected()
{
    subscribeToTopics(m_subscribeTopics);
}




void MqttClient::subscribeToTopics(const QStringList& topics)
{
    for (const auto& topic : topics) {
        subscribeToTopic(topic);
    }
}

void MqttClient::subscribeToTopic(const QString &topic)
{

    mqClient->subscribe(topic);
}



void MqttClient:: sendMessage(const QString& topic, const QByteArray& message)
{
    if (mqClient->state() == QMqttClient::Connected) {
        auto pub = mqClient->publish(QMqttTopicName(topic), message);
        if (pub == -1)
            qDebug() << "Could not publish message";
        else
            qDebug() << "Message published"<<message;
    } else {
        qDebug() << "Not connected to MQTT server";
    }
}

void MqttClient::onMessageReceived(const QByteArray &message, const QMqttTopicName &topic)
{


    if (topic.name() == "hxgc/companycode/pro/P") {
        emit proMessageReceived(message,topic);
    }else{
        emit messageAndTopicReceived(message, topic);
    }

}

void MqttClient::onStateChanged(QMqttClient::ClientState state)
{
    switch (state) {
    case QMqttClient::ClientState::Disconnected:
        qDebug() << "MQTT 客户端状态: 断开连接";
        break;
    case QMqttClient::ClientState::Connecting:
        qDebug() << "MQTT 客户端状态: 正在连接";
        break;
    case QMqttClient::ClientState::Connected:
        qDebug() << "MQTT 客户端状态: 已连接";
        break;
    default:
        qDebug() << "MQTT 客户端状态: 未知状态";
        break;
    }
}


void MqttClient::onError(QMqttClient::ClientError error)
{

    qDebug() << "MQTT 错误: " << error;
}