public virtual AvailableBook giveBack(BorrowedBook borrowedBook)
{
bool isBookRemovedFromUserAccount = borrowedBooks.Any(book => book.UserId == borrowedBook.UserId);
if (isBookRemovedFromUserAccount)
{
return(new AvailableBook()
{
Id = borrowedBook.Id
});
}
else
{
throw new System.ArgumentException("User with an id: " + id + " didn't borrow book with an id: " + borrowedBook.Id);
}
}
public virtual BorrowedBook borrow(ReservedBook reservedBook)
{
if (hasUserNotReachedLimitOfBooks())
{
BorrowedBook borrowedBook = new BorrowedBook()
{
Id = reservedBook.Id,
UserId = reservedBook.AssignedUserId
};
borrowedBooks.Add(borrowedBook);
return(borrowedBook);
}
else
{
throw new TooManyBooksAssignedToUserException(id);
}
}
