public static Loan CreateLoanFrom(Book book, Member member)
{
Loan loan = new Loan();
loan.Book = book;
loan.Member = member;
loan.LoanDate = DateTime.Now;
loan.DateForReturn = DateTime.Now.AddDays(7);
return loan;
}
public void Return(Book book)
{
Loan loan = FindCurrentOutstandingLoanFor(book);
if (loan != null)
{
loan.MarkAsReturned();
book.OnLoanTo = null;
}
else
throw new ApplicationException(String.Format("Cannot return book '{0}'. Member '{1}' does not have this book on loan.", book.Id.ToString(), this.Id.ToString()));
}
public Loan Loan(Book book)
{
Loan loan = default(Loan);
if (CanLoan(book))
{
loan = LoanFactory.CreateLoanFrom(book, this);
Loans.Add(loan);
}
else
throw new ApplicationException(String.Format("Cannot loan book '{0}'. Book is on to member '{1}'", book.Id.ToString(), book.OnLoanTo.Id.ToString()));
return loan;
}
public AddBookResponse AddBook(AddBookRequest request)
{
AddBookResponse response = new AddBookResponse();
BookTitle bookTitle = _bookTitleRepository.FindBy( request.ISBN);
Book book = new Book();
book.Title = bookTitle;
book.Id = Guid.NewGuid();
_bookRepository.Add(book);
_uow.Commit();
response.Success = true;
return response;
}
public bool CanLoan(Book book)
{
return book.OnLoanTo == null;
}
private Loan FindCurrentOutstandingLoanFor(Book book)
{
return Loans.FirstOrDefault(l => (l.Book.Id == book.Id && l.HasNotBeenReturned()));
}
