public AlbumAddItemViewModel(Album album)
{
if (album != null)
{
AlbumId = album.Id;
AlbumTitle = album.Title;
UserId = album.UserId;
GroupId = album.GroupId;
}
}
public AlbumCreateEditViewModel(Album album)
{
if (album != null)
{
AlbumId = album.Id;
Title = album.Title;
Description = album.Description;
IsOpen = album.IsOpen;
GroupId = album.GroupId;
UserId = album.UserId;
}
}
public AlbumViewModel(Album album)
{
if (album == null)
return;
Id = album.Id;
GroupId = album.GroupId;
UserId = album.UserId;
Title = album.Title;
Description = album.Description;
ChangeDate = album.ChangeDate;
IsOpen = album.IsOpen;
IsEmpty = album.Items.Count == 0;
Items = album.Items.Select(x => new AlbumItemViewModel(x)).ToList();
AddItem = new AlbumAddItemViewModel(album);
}
public static void DeleteAlbum(UserContainer currContext, Album album)
{
if (currContext != null)
{
if (album.GroupId.HasValue)
{
var gm = GroupService.UserInGroup(currContext.Id, album.GroupId.Value, true);
if (gm.State != (byte)GroupMemberState.Moderator)
throw new BusinessLogicException("Только модераторы могут удалить альбом группы");
}
else if (album.UserId.HasValue)
{
if (album.UserId != currContext.Id)
throw new BusinessLogicException("Нельзя удалить чужой альбом");
}
else
throw new BusinessLogicException("Альбом ни к чему не привязан");
}
DataService.PerThread.AlbumSet.DeleteObject(album);
DataService.PerThread.SaveChanges();
}
public static Album CreateAlbum(Guid? groupId, Guid? userId, string title, string description, bool isOpen)
{
var album = new Album
{
GroupId = groupId,
UserId = userId,
Title = title,
Description = description,
ChangeDate = DateTime.Now,
IsOpen = isOpen
};
DataService.PerThread.AlbumSet.AddObject(album);
DataService.PerThread.SaveChanges();
return album;
}
private void FixupAlbum(Album previousValue)
{
if (previousValue != null && previousValue.Items.Contains(this))
{
previousValue.Items.Remove(this);
}
if (Album != null)
{
if (!Album.Items.Contains(this))
{
Album.Items.Add(this);
}
if (AlbumId != Album.Id)
{
AlbumId = Album.Id;
}
}
}