void BorrowBookExecute(DataGrid _Books)
{
Book SelectedBook = null;
// Try casting SelectedItem to Book - if it fails, there was nothing selected
try
{
SelectedBook = (Book)_Books.SelectedItem;
if (SelectedBook == null)
{
throw new Exception();
}
}
catch (Exception)
{
Message = "Uh Oh! Something went wrong. Make sure you've selected a desired Book!";
OnPropertyChanged("Message");
return;
}
if (SelectedBook.Stock < 1)
{
// Falltrough, no or invalid book selected
Message = "This Book is out of Stock!";
OnPropertyChanged("Message");
return;
}
// Reset Message
Message = "";
OnPropertyChanged("Message");
BorrowWindow _BorrowWindow = new BorrowWindow();
_BorrowWindow.DataContext = new BorrowWindowViewModel()
{
SelectedBook = SelectedBook,
BorrowWindow = _BorrowWindow
};
// ShowDialog returns when the Window is closed
_LibrarianWindow.Hide();
_BorrowWindow.ShowDialog();
// TODO: Refactor to single Item update... (Needs new StoredProcedure)
UpdateBorrows();
UpdateBooks();
_LibrarianWindow.Show();
}
private void AuthenticateExecute(IClosable _LoginWindow)
{
// Evaluate input mask command to generate Dummy Data;
if (Uid == "$MAKE_DUMMY")
{
int Errors = DummyDataManager.Generate();
if (Errors == 0)
{
Message = "Executed. Dummy Data generated!";
}
else
{
Message = $"Executed. At least {Errors} Columns weren't inserted!";
}
OnPropertyChanged("Message");
return;
}
//else if (Uid == "$DELETE_DB")
//{
// int Errors = DummyDataManager.DeleteAll();
// if (Errors == 0) Message = "Executed. Empties all Tables!";
// else Message = $"Executed. At least {Errors} Tables weren't emptied!";
// OnPropertyChanged("Message");
// return;
//}
// Get Name and LastName components from input string
Regex RegexUid = new Regex(@"^(\S*)\.(\S*)\s*$");
Match Identity = RegexUid.Match(Uid.ToLower());
string Name = Identity.Groups[1].ToString();
string LastName = Identity.Groups[2].ToString();
if (Identity.Groups.Count < 2)
{
Message = $"Illegal Uid! Must match '{RegexUid.ToString()}'";
OnPropertyChanged("Message");
return;
}
// Authenticate the Librarian / Customer
dynamic User = Access.Auth(Name, LastName, Password);
Librarian _Librarian = null;
Customer _Customer = null;
// Try casting to Librarian and Customer to check who has logged in
try { _Librarian = User; } catch (Exception) { /* Ignore */ }
try { _Customer = User; } catch (Exception) { /* Ignore */ }
if (_Librarian != null)
{
LibrarianWindow _LibrarianWindow = new LibrarianWindow();
_LibrarianWindow.DataContext = new LibrarianWindowViewModel()
{
User = _Librarian, LibrarianWindow = _LibrarianWindow
};
_LibrarianWindow.Show();
_LoginWindow.Close();
}
else if (_Customer != null)
{
CustomerWindow _CustomerWindow = new CustomerWindow();
_CustomerWindow.DataContext = new CustomerWindowViewModel()
{
User = _Customer
};
_CustomerWindow.Show();
_LoginWindow.Close();
}
else
{
// Falltrough, invalid login data
Message = "Uh Oh! Something went wrong.";
OnPropertyChanged("Message");
}
}