/// <summary>
/// Method to make a loan of a book for a member.
/// </summary>
/// <param name="member">Member that makes the loan.</param>
/// <param name="book">Book the member wants to loan.</param>
public void MakeLoan(Member member, Book book)
{
if (null == bookRepository.Find(book.ISBN))
{
throw new ArgumentException("No book wit ISBN: " + book.ISBN + " found in database.");
}
else
{
List <int> noOfCopiesOnLoan = loanRepository.All().
Where(loan => loan.TimeOfReturn == null).
Where(loan => loan.Copy.Book.ISBN == book.ISBN).
Select(loan => loan.Copy.ID).
ToList();
BookCopy copyToLoan = bookCopyRepository.All().
Where(c => false == noOfCopiesOnLoan.Contains(c.ID)).
Where(c => c.Book.ISBN == book.ISBN).
FirstOrDefault();
if (null == copyToLoan)
{
throw new ArgumentException("No bookcopy available for Title: " + book.Title + ".");
}
else
{
MakeLoan(member, copyToLoan);
}
}
}
/// <summary>
/// Method to add a book to the database.
/// </summary>
/// <param name="book">Book</param>
public void AddBook(Book book)
{
if (null != bookRepository.Find(book.ISBN))
{
throw new ArgumentException("Trying to add aready existing book according to ISBN no: " + book.ISBN + ".");
}
bookRepository.Add(book);
Updated.Invoke(this, new EventArgs());
}
/// <summary>
/// Method to add a new copy of an existing book.
/// </summary>
/// <param name="book">Book to add a copy too.</param>
public void AddBookCopy(Book book)
{
if (null == bookRepository.Find(book.ISBN))
{
throw new ArgumentException("Book with given Title: " + book.Title + " and ISBN: " + book.ISBN + " does not exist in the database.");
}
bookCopyRepository.Add(new BookCopy()
{
Book = book
});
Updated.Invoke(this, new EventArgs());
}
/// <summary>
/// Finds a specific book given its ID.
/// </summary>
/// <param name="id"></param>
/// <returns>The book with the ID provided</returns>
public Book Find(int id)
{
return(bookRepository.Find(id));
}
/// <summary>
/// Method to edit a book
/// </summary>
/// <param name="item">book to edit</param>
public void Edit(Book item)
{
var booktoedit = bookRepo.Find(item.Id);
bookRepo.Edit(booktoedit);
}
public Book FindBook(int key)
{
return(bookRepository.Find(key));
}
