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/*
File : MQTT_test.cpp
Project : LabPlot
Description : Tests for MQTT import.
--------------------------------------------------------------------
SPDX-FileCopyrightText: 2018 Kovacs Ferencz <kferike98@gmail.com>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "MQTT_test.h"
#include "ui_MQTT_test.h"
#include <QDateTime>
#include <QMqttClient>
#include <QMessageBox>
#include <QtMath>
#include <QTimer>
#include <iostream>
#include <chrono>
#include <random>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow),
m_run (false),
m_pathes (1),
m_itersTotal (100000),
m_iters (300),
m_iterCount (0),
m_delta (0.25),
m_dt (0.1),
m_interval (1000),
m_seed (std::chrono::system_clock::now().time_since_epoch().count()) {
ui->setupUi(this);
m_timer = new QTimer(this);
m_timer->setInterval(m_interval);
m_generator = new std::default_random_engine (m_seed);
m_distribution = new std::normal_distribution<double> (0.0, (qPow(m_delta, 2.0) * m_dt));
m_x.fill(0.0, m_pathes);
m_client = new QMqttClient(this);
m_client->setHostname(ui->lineEditHost->text());
m_client->setPort(ui->spinBoxPort->value());
connect(m_client, &QMqttClient::disconnected, this, &MainWindow::brokerDisconnected);
connect(m_timer, &QTimer::timeout, this, &MainWindow::onTimeout);
connect(ui->lePublishInterval, &QLineEdit::textChanged, this, &MainWindow::intervalChanged);
connect(ui->bPublish, &QPushButton::clicked, this, &MainWindow::onTimeout);
connect(m_client, &QMqttClient::connected, this, &MainWindow::onConnect);
connect(m_client, &QMqttClient::messageReceived, this, [this](const QByteArray &message, const QMqttTopicName &topic) {
const QString content = QDateTime::currentDateTime().toString()
+ QLatin1String(" Received Topic: ")
+ topic.name()
+ QLatin1String(" Message:\n")
+ message
+ QLatin1Char('\n');
ui->editLog->insertPlainText(content);
});
connect(ui->lineEditHost, &QLineEdit::textChanged, m_client, &QMqttClient::setHostname);
connect(ui->spinBoxPort, QOverload<int>::of(&QSpinBox::valueChanged), this, &MainWindow::setClientPort);
}
MainWindow::~MainWindow() {
delete ui;
qApp->quit();
}
void MainWindow::on_buttonConnect_clicked() {
if (m_client->state() == QMqttClient::Disconnected) {
ui->lineEditHost->setEnabled(false);
ui->spinBoxPort->setEnabled(false);
ui->buttonConnect->setText(tr("Disconnect"));
m_client->connectToHost();
} else {
ui->lineEditHost->setEnabled(true);
ui->spinBoxPort->setEnabled(true);
ui->buttonConnect->setText(tr("Connect"));
m_client->disconnectFromHost();
}
}
void MainWindow::on_buttonQuit_clicked() {
QApplication::quit();
}
void MainWindow::brokerDisconnected() {
ui->lineEditHost->setEnabled(true);
ui->spinBoxPort->setEnabled(true);
ui->buttonConnect->setText(tr("Connect"));
}
void MainWindow::setClientPort(int p) {
m_client->setPort(p);
}
void MainWindow::on_buttonSubscribe_clicked() {
if(m_client->state() == QMqttClient::ClientState::Connected) {
QMqttTopicFilter filterX{"brownian/x"};
QMqttSubscription* subscription;
subscription = m_client->subscribe(filterX , ui->spinQoS->text().toUInt());
if (!subscription) {
QMessageBox::critical(this, QLatin1String("Error"), QLatin1String("Could not subscribe. Is there a valid connection?"));
return;
}
m_qos = subscription->qos();
m_brownianX = new QMqttTopicName(subscription->topic().filter()) ;
for (int i = 0; i < m_pathes; i++) {
QMqttTopicFilter filterY{"brownian/y"+QString::number(i)};
subscription = m_client->subscribe(filterY , ui->spinQoS->text().toUInt());
if (!subscription) {
QMessageBox::critical(this, QLatin1String("Error"), QLatin1String("Could not subscribe. Is there a valid connection?"));
return;
}
m_brownianTopics.push_back(new QMqttTopicName(subscription->topic().filter())) ;
}
m_timer->start();
}
}
void MainWindow::onTimeout() {
if(m_client->state() == QMqttClient::ClientState::Connected &&
!m_brownianTopics.isEmpty()) {
QString s;
QVector<QString> brownianY;
brownianY.fill(QString(), m_pathes);
if (m_iterCount < m_itersTotal - m_iters - 1)
for (int i = 0; i < m_iters; i++) {
if (!s.isEmpty())
s.append("\n");
s.append(QString::number(m_iterCount * m_dt));
for (int j = 0; j < m_pathes; j++) {
if(!brownianY[j].isEmpty())
brownianY[j].append("\n");
m_x[j] = m_x[j] + m_distribution->operator() (*m_generator);
brownianY[j].append(QString::number(m_x[j]));
}
m_iterCount++;
}
if (m_client->publish(*m_brownianX,
s.toUtf8(),
m_qos,
false) == -1)
QMessageBox::critical(this, QLatin1String("Error"), QLatin1String("Could not publish message"));
for (int i = 0; i < m_pathes; i++) {
if (m_client->publish(*m_brownianTopics[i],
brownianY[i].toUtf8(),
m_qos,
false) == -1)
QMessageBox::critical(this, QLatin1String("Error"), QLatin1String("Could not publish message"));
}
}
}
void MainWindow::intervalChanged(const QString& interval) {
int newInterval = interval.toInt();
m_timer->start(newInterval);
m_interval = newInterval;
}
void MainWindow::onConnect() {
const QString content = QDateTime::currentDateTime().toString() +" Successfully connected to broker";
ui->editLog->insertPlainText(content);
}
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