public static void UpdateAlbum(AlbumViewModel album)
{
if (album.HasErrors)
{
throw new ArgumentException("Album contains invalid data");
}
var existing = _albums.SingleOrDefault(a => a == album);
if (existing != null && existing.Model.Id != album.Model.Id)
{
// Revert to previous values
SetViewModelFromModel(album);
throw new DuplicateObjectException();
}
if (!(album.IsMain ?? false) && MainAlbum == null)
{
// Undo IsMain change
album.IsMain = true;
throw new RequiredConstraintViolationException(
"You have to set another album as 'Main' before unsetting 'Main'");
}
if ((album.IsMain ?? false) && _albums.Where(a => a.IsMain ?? false).Count() > 1)
{
UnsetPreviousMainAlbum(album);
}
SetModelFromViewModel(album);
AlbumsManager.UpdateAlbum(album.Model);
}
