QVariant GameListModel::data(
    const QModelIndex& index, int role
) const
{
    // might be cool in the future
    // but for now let's just focus
    // on display role
    if (role != Qt::DisplayRole)
        return QVariant();

    auto file = games.at(index.row());
    QFileInfo file_info(file);
    auto file_size = double(file_info.size());

    switch (index.column())
    {
        case COLUMN_NAME:
            return file_info.fileName();
        case COLUMN_SIZE:
            if (file_size >= 1024*1024*1024) {
                return QString().sprintf("%.1f GiB", file_size / 1024*1024*1024);
            } else if (file_size >= 1024*1024) {
                return QString().sprintf("%.1f MiB", file_size / 1024*1024);
            } else if (file_size >= 1024) {
                return QString().sprintf("%.1f KiB", file_size / 1024);
            }
            return QString().sprintf("%.0lf bytes", file_size);
    }

    return QVariant();
}