update-client/Common/ConfigHelper.h

#pragma once
#include <QByteArray>
#include <QString>

class QSettings;

class ConfigHelper
{
public:
    static ConfigHelper& instance();
    static int runElevatedWriteCommandIfRequested();
    static bool writeFileWithElevationIfNeeded(const QString& path, const QByteArray& data,
                                               QString* errorMessage = nullptr);
    static bool removeFileWithElevationIfNeeded(const QString& path, QString* errorMessage = nullptr);
    QString getValue(const QString& section, const QString& key) const;
    bool setValue(const QString& section, const QString& key, const QString& value);
    QString configPath() const;
    QString installRoot() const;
    QString runtimeRoot() const;
    QString updateRoot() const;
    QString runtimeRelativePath() const;
    QString lastError() const;

private:
    ConfigHelper();
    bool migrateLegacyIniIfNeeded();
    void enterRegistryGroup(QSettings& settings) const;
    bool syncRegistryFromConfigFileIfChanged();
    bool readRegistryValue(const QString& key, QString* value) const;
    bool writeRegistryValue(const QString& key, const QString& value);
    QString readFileValue(const QString& key) const;
    QString m_configPath;
    QString m_registryInstallId;
    QString m_error;
};