private static string GetPictureId(File file, IPicture picture, ArtworkType type)
{
//Year + (Album | Checksum) + Type
var hashCode = default(long);
unchecked
{
if (file.Tag.Year != 0)
{
hashCode = (hashCode * 29) + file.Tag.Year.GetHashCode();
}
if (!string.IsNullOrEmpty(file.Tag.Album))
{
hashCode += file.Tag.Album.ToLower().GetHashCode();
}
else
{
hashCode += picture.Data.Checksum;
}
hashCode = (hashCode * 29) + type.GetHashCode();
}
return(Math.Abs(hashCode).ToString());
}
