//CRUD Operations
//1. CREAT
public Book AddNewBook(Book newBook)
{
if (newBook == null)
throw new ArgumentNullException("newBook");
newBook.BookId = counter++;
books.Add(newBook);
return newBook;
}
public string UpdateBook(Book book, string id)
{
bool updated = repository.UpdateABook(book);
if (updated)
return "Book with id = " + id + " updated successfully";
else
return "Unable to update book with id = " + id;
}
//4. UPDATE
public bool UpdateABook(Book updatedBook)
{
if (updatedBook == null)
throw new ArgumentNullException("updatedBook");
int idx = books.FindIndex(b => b.BookId == updatedBook.BookId);
if (idx == -1)
return false;
books.RemoveAt(idx);
books.Add(updatedBook);
return true;
}
public string AddBook(Book book, string id)
{
Book newBook = repository.AddNewBook(book);
return "id=" + newBook.BookId;
}