protected override async Task HandleCommandAsync(AddBookParameters input, CommandResult <AddBookResult> commandResult)
{
// try to find book by isbn
var book = await _bookRepo.FindAsync(input.Isbn);
if (book != null)
{
if (!validateBookAttributes(book, input))
{
commandResult.Fail();
return;
}
}
else
{
// create new book
book = Book.Create(input.Isbn, input.Title, input.Description, input.AuthorFirstName,
input.AuthorLastName);
}
var library = new MyLibrary(input.UserId);
var mybook = library.AddBook(book, null);
await _bookRepo.SaveAsync(book);
await _mybookRepo.SaveAsync(mybook);
commandResult.Success(new AddBookResult(input.Isbn));
}
private bool validateBookAttributes(Book book, AddBookParameters input)
{
return(book.Title.Equals(input.Title, StringComparison.CurrentCultureIgnoreCase) &&
book.Author.FirstName.Equals(input.AuthorFirstName, StringComparison.CurrentCultureIgnoreCase) &&
book.Author.LastName.Equals(input.AuthorLastName, StringComparison.CurrentCultureIgnoreCase));
}
