Legacy_v2/src/Legacy/utils.h

/*
 * This file contains minor utility functions
 */

#ifndef UTILS_H
#define UTILS_H

#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QEventLoop>
#include <QFile>
#include <QTimer>
#include <QLockFile>
#include <QDir>
#include <QMessageBox>

bool checkInternetConnection(QUrl url) {
    QNetworkAccessManager nam;
    QNetworkRequest req(url);
    QNetworkReply* reply = nam.get(req);
    QEventLoop loop;
    QObject::connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit);

    QTimer request_timeout_timer;
    QObject::connect(&request_timeout_timer, &QTimer::timeout, &loop, &QEventLoop::quit);
    request_timeout_timer.start(5000); // 5 seconds connection timeout
    loop.exec();
    return reply->bytesAvailable();
}

void logMessageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
{
    QString message_type;

    switch (type) {
    case QtDebugMsg:
        message_type = "[DEBG]";
        break;
    case QtInfoMsg:
        message_type = "[INFO]";
        break;
    case QtWarningMsg:
        message_type = "[WARN]";
        break;
    case QtCriticalMsg:
        message_type = "[CRIT]";
        break;
    case QtFatalMsg:
        message_type = "[FATL]";
        break;
    default:
        message_type = "[UNKN]";
        break;
    }

    QString filename = context.category;
    QString function = context.function;
    QString line_number = QString::number(context.line);

    QString s = QString("%1: %2 ||| %3:%4 %5\n")
                .arg(message_type)
                .arg(msg)
                .arg(filename)
                .arg(line_number)
                .arg(function);

#ifdef QT_DEBUG
    QFile log_file("legacy_v2.log");
    log_file.open(QIODevice::ReadWrite | QIODevice::Append);
    QTextStream stream(&log_file);
    stream << s;
    log_file.close();
#endif

    fprintf(stderr, "%s", qUtf8Printable(s));
    fflush(stderr);
}

bool checkSingleAppInstance() {
    QLockFile lockFile(QDir::temp().absoluteFilePath("rulotro.lock"));
    if(!lockFile.tryLock(1)){
        qDebug() << "Lock file already exists! Some other application is already running...";
        QMessageBox msgBox;
        msgBox.setIcon(QMessageBox::Warning);
        msgBox.setText("Приложение уже запущено.\nРазрешено запускать только один экземпляр приложения.");
        msgBox.exec();
        return false;
    }
    return true;
}

#endif // UTILS_H