Class clone

launcher/FileSystem.h:483–523

* @brief Copies a directory and it's contents from src to dest */

 * @brief Copies a directory and it's contents from src to dest
 */
class clone : public QObject {
    Q_OBJECT
   public:
    clone(const QString& src, const QString& dst, QObject* parent = nullptr) : QObject(parent)
    {
        m_src.setPath(src);
        m_dst.setPath(dst);
    }
    clone& matcher(const IPathMatcher* filter)
    {
        m_matcher = filter;
        return *this;
    }
    clone& whitelist(bool whitelist)
    {
        m_whitelist = whitelist;
        return *this;
    }

    bool operator()(bool dryRun = false) { return operator()(QString(), dryRun); }

    qsizetype totalCloned() { return m_cloned; }
    qsizetype totalFailed() { return m_failedClones.length(); }

    QList<QPair<QString, QString>> failed() { return m_failedClones; }

   signals:
    void fileCloned(const QString& src, const QString& dst);
    void cloneFailed(const QString& src, const QString& dst);

   private:
    bool operator()(const QString& offset, bool dryRun = false);

   private:
    const IPathMatcher* m_matcher = nullptr;
    bool m_whitelist = false;
    QDir m_src;
    QDir m_dst;
    qsizetype m_cloned;
    QList<QPair<QString, QString>> m_failedClones;
};

/**
 * @brief clone/reflink file from src to dst