private void DeleteCopiesButton_Click(object sender, EventArgs e)
{
if (BooksListBox.CheckedItems.Count == 0)
{
var selectError = new ErrorForm("You must select a book to delete copies!");
selectError.ShowDialog();
return;
}
if (string.IsNullOrWhiteSpace(NumberOfCopiesToDeleteTextBox.Text))
{
return;
}
var selected = BooksListBox.SelectedItem.ToString();
var deletedAllAvailableCopies = false;
for (var i = 0; i < int.Parse(NumberOfCopiesToDeleteTextBox.Text); i++)
{
var copyToDelete = _bookCopyRepository.GetAllBookCopies().FirstOrDefault(bookCopy =>
bookCopy.Book.ToString() == selected && bookCopy.Status == BookStatus.Available);
if (copyToDelete == null)
{
deletedAllAvailableCopies = true;
break;
}
_bookCopyRepository.TryDelete(copyToDelete);
}
if (_bookCopyRepository.GetAllBookCopies().FirstOrDefault(bookCopy => bookCopy.Book.ToString() == selected) == null)
{
_bookRepository = new BookRepository();
_bookCopyRepository = new BookCopyRepository();
var checkedBook = _bookRepository.GetAllBooks()
.FirstOrDefault(book => book.ToString() == selected);
_bookRepository.TryDelete(checkedBook);
}
else if (deletedAllAvailableCopies)
{
var borrowedError = new ErrorForm("Borrowed copies cannot be deleted until returned!");
borrowedError.ShowDialog();
}
NumberOfCopiesToDeleteTextBox.Text = "";
RefreshBookInfoListBox();
RefreshBooksListBox();
}
