public async Task <int> Handle(CreateFolderCommand request, CancellationToken cancellationToken)
{
if (request.ParentId.HasValue && !await foldersRepository.Exists(request.ParentId.Value))
{
throw new ParentFolderDoesNotExistRequestException();
}
if (!await foldersRepository.IsUniqueInParent(request.Name, request.ParentId))
{
throw new FolderNameMustBeUniqueInParentRequestException();
}
var folder = new Folder(request.Name, request.ParentId);
var folderId = await foldersRepository.AddAsync(folder);
return(folderId);
}
