pc-system/mqtt/mqttclient.cpp

#include "mqttclient.h"

#include <QJsonDocument>
#include <QJsonObject>
#include <QMessageBox>
#include <QPushButton>

#include "../global.h"
#include "../logger.h"

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

void MqttClient::connectToMqttBroker(const QString &hostname, quint16 port, const QString &username,
                                     const QString &password, const QString &clientId) {
    _mqClient->setHostname(hostname);
    _mqClient->setPort(port);
    _mqClient->setKeepAlive(20);

    // 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() {
    Logger::getInstance().debug("MQTT conncted");
    subscribeToTopics(m_subscribeTopics);
}

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

void MqttClient::disconnectFromMqttBroker() {
    Logger::getInstance().info("MQTT client disconnecting from broker" + _mqClient->state());
    if (_mqClient->state() == QMqttClient::Connected) {
        _mqClient->disconnectFromHost();
    }
}

bool MqttClient::isConnected() const { return _mqClient->state() == QMqttClient::Connected; }

QMqttSubscription *MqttClient::subscribeToTopic(const QString &topic) { return _mqClient->subscribe(topic); }

void MqttClient::sendMessage(const QString &topic, const QByteArray &message, quint8 qos, bool isRetainedMsg) {
    if (_mqClient->state() == QMqttClient::Connected) {
        auto pub = _mqClient->publish(QMqttTopicName(topic), message, qos, isRetainedMsg);
        if (pub == -1)
            Logger::getInstance().error(
                QString("Error MQTT client sent message to topic: %1, msg: %2, qos: %3, isRetainedMsg: %4")
                    .arg(topic, QString(message), QString::number(qos), isRetainedMsg ? "true" : "false"));
        else
            Logger::getInstance().info(
                QString("MQTT client sent message to topic: %1, msg: %2, qos: %3, isRetainedMsg: %4")
                    .arg(topic, QString(message), QString::number(qos), isRetainedMsg ? "true" : "false"));
    } else {
        qDebug() << "Not connected to MQTT server";
        Logger::getInstance().error(
            QString("MQTT client is not connected to the server. topic: %1, msg: %2").arg(topic, QString(message)));
    }
}

void MqttClient::onMessageReceived(const QByteArray &message, const QMqttTopicName &topic) {
    if (topic.name() == MQTT_TOPIC_COMPANY_PROJECTS_SUB) {
        emit proMessageReceived(message, topic);
    } else {
        emit messageReceived(message, topic);
    }
}

void MqttClient::onStateChanged(QMqttClient::ClientState state) {
    switch (state) {
        case QMqttClient::ClientState::Disconnected: {
            QMessageBox msgBox;
            msgBox.setWindowTitle("MQtt 错误");
            msgBox.setText("mqtt连接失败, 请检查网络连接或MQTT服务器状态");
            QPushButton *yesButton = msgBox.addButton("重连", QMessageBox::YesRole);
            QPushButton *noButton = msgBox.addButton("取消", QMessageBox::NoRole);
            yesButton->setStyleSheet(
                "QPushButton { background-color:rgb(5, 58, 156); color: white; padding: 5px 15px; "
                "border-radius: 4px; }");
            noButton->setStyleSheet(
                "QPushButton { background-color: #f44336; color: white; padding: 5px 15px; "
                "border-radius: 4px; }");
            msgBox.exec();
            if (msgBox.clickedButton() == yesButton) {
                // TODO
                _mqClient->connectToHost();
                break;
            }
            Logger::getInstance().info("mqtt disconnected");
            break;
        }
        case QMqttClient::ClientState::Connecting:
            Logger::getInstance().info("mqtt connecting");
            break;
        case QMqttClient::ClientState::Connected:
            Logger::getInstance().info("mqtt connected");
            break;
        default:
            Logger::getInstance().info("mqtt other state" + state);
            break;
    }
}

void MqttClient::onError(QMqttClient::ClientError error) {
    Logger::getInstance().error(QString("MQTT client error: %1").arg(static_cast<int>(error)));
}