public Shared.Logic.WebModel.IAuthor AddAuthor(Shared.Logic.WebModel.IAuthor author)
{
if (author == null)
{
return(null);
}
IAuthor dataAuthor = Mapper.MapEntities <Shared.Logic.WebModel.IAuthor, IAuthor>(author);
if (_dataContext is null || dataAuthor is null)
{
return(null);
}
lock (_authorsLock)
{
if (_dataContext.Authors.Select(a => a.Id).Contains(author.Id))
{
return(author);
}
lock (_booksLock)
{
for (int i = 0; i < dataAuthor.Books.Count(); ++i)
{
IBook original = _dataContext.Books.FirstOrDefault(b => b.Id == dataAuthor.Books[i].Id);
if (original != null)
{
dataAuthor.Books[i] = original;
}
}
foreach (IBook book in dataAuthor.Books.Where(b => !_dataContext.Books.Select(a => a.Id).Contains(b.Id)))
{
_dataContext.AddBook(book);
}
}
_dataContext.AddAuthor(dataAuthor);
}
return(author);
}