update-client/MainApp/MainWindow.cpp

#include "MainWindow.h"

#include <QApplication>
#include <QCryptographicHash>
#include <QFile>
#include <QFont>
#include <QLabel>
#include <QVBoxLayout>

#include "../Common/ConfigHelper.h"

namespace {

QString configValue(const QString& key, const QString& fallback = QString())
{
    const QString value = ConfigHelper::instance().getValue(QString(), key).trimmed();
    return value.isEmpty() ? fallback : value;
}

QString readDllVersion(const QString& dllPath)
{
    QFile file(dllPath);
    if (!file.exists())
        return QStringLiteral("missing");

    if (!file.open(QIODevice::ReadOnly))
        return QStringLiteral("unreadable");

    const QByteArray data = file.read(1024);
    file.close();
    return QString::fromUtf8(QCryptographicHash::hash(data, QCryptographicHash::Sha256).toHex().left(8));
}

} // namespace

MainWindow::MainWindow(QWidget* parent)
    : QWidget(parent)
{
    this->setWindowTitle("SimCAE Demo MainApp");
    this->resize(600, 400);

    const QString appVersion = configValue(QStringLiteral("current_version"), QStringLiteral("unknown"));
    const QString product = configValue(QStringLiteral("product_code"),
        configValue(QStringLiteral("app_id"), QStringLiteral("unknown")));
    const QString channel = configValue(QStringLiteral("channel"), QStringLiteral("stable"));
    const QString apiBaseUrl = configValue(QStringLiteral("api_base_url"), QStringLiteral("not configured"));
    const QString tokenState = configValue(QStringLiteral("client_token")).isEmpty()
        ? QStringLiteral("missing")
        : QStringLiteral("configured");
    const QString dllVersion = readDllVersion(QApplication::applicationDirPath() + "/plugins/demo_plugin.dll");

    QVBoxLayout* layout = new QVBoxLayout(this);
    QLabel* label = new QLabel(QString(
        "Software Running Successfully\n"
        "Product: %1\n"
        "Version: %2\n"
        "Channel: %3\n"
        "Server: %4\n"
        "Update Client Token: %5\n"
        "DLL Version: %6")
        .arg(product, appVersion, channel, apiBaseUrl, tokenState, dllVersion));
    QFont font = label->font();
    font.setPointSize(13);
    label->setFont(font);
    label->setAlignment(Qt::AlignCenter);

    layout->addWidget(label);
    this->setLayout(layout);
}