public static void TakeBook(BookRegister allBooks, TakenBookRegister takenBooks, ReaderRegister readers, string isbn, string readerName, DateTime returnDate, out bool successful,
int maxBookCount)
{
successful = false;
if (!takenBooks.Contains(isbn) && allBooks.Contains(isbn))
{
Book book = allBooks.Get(isbn);
if (readers.Contains(readerName))
{
Reader reader = readers.Get(readerName);
if (reader.BookCount < maxBookCount)
{
readers.AddBookCount(reader);
TakenBook takenBook = new TakenBook(book, returnDate, reader);
takenBooks.Add(takenBook);
successful = true;
}
}
else
{
Reader reader = new Reader(readerName);
readers.Add(reader);
TakenBook takenBook = new TakenBook(book, returnDate, reader);
takenBooks.Add(takenBook);
successful = true;
}
}
}
public static void ReturnBook(TakenBookRegister takenBooks, ReaderRegister readers, string isbn, out bool lateReturn)
{
lateReturn = false;
TakenBook book = takenBooks.Get(isbn);
if (DateTime.Now > book.ReturnDate)
{
lateReturn = true;
}
readers.MinusBookCount(book.Reader);
takenBooks.Remove(book);
}
public void Remove(TakenBook book)
{
allBooks.Remove(book);
}
public void Add(TakenBook book)
{
this.allBooks.Add(book);
}