public LoginWindow(MainWindow mainWindow)
{
InitializeComponent();
_mainWindow = mainWindow;
VoteButton.Clicked += VoteButton_Clicked;
Loaded += (s, ea) =>
{
//Focus on first name field in the login form
FirstNameTextBox.FocusOnMe();
};
}
private void VoteButton_Clicked(object sender, EventArgs e)
{
try
{
//Check if all fields valid, then check if pesel is not blocked, then check if pesel didn't already vote
if (ValidateFields())
{
//Disable login form
SetLoginFormEnable(false);
//Download blocked pesels from server and check if it contains provided pesel
_peselWorker = new BackgroundWorker();
_peselWorker.DoWork += (s, ea) =>
{
try
{
List <string> errorList = new List <string>();
string providedPesel = "";
//Show loading overlay
this.Dispatcher.Invoke(() =>
{
_mainWindow.LoadingLabel.Foreground = ColorHelper.HexToColorBrush("#1c9ad2");
_mainWindow.LoadingLabel.Content = "Checking your data...";
_mainWindow.LoadingContainer.Visibility = Visibility.Visible;
providedPesel = PeselTextBox.Text;
});
using (System.Net.WebClient client = new System.Net.WebClient())
{
string jsonData =
client.DownloadString(new Uri("http://webtask.future-processing.com:8069/blocked"));
BlockedRoot root =
JsonConvert.DeserializeObject <BlockedRoot>(jsonData);
List <string> blockedPesels = root.Disallowed.Person.Select(obj => obj.Pesel).ToList();
if (blockedPesels.Contains(providedPesel))
{
//Blocked pesels list contains provided pesel, invoke event to report disallowed try to database
errorList.Add("You have lost your voting privileges.");
Dispatcher.Invoke(() =>
{
LoginDisallowed?.Invoke(this,
new LoginEventArgs()
{
FirstName = FirstNameTextBox.Text,
LastName = LastNameTextBox.Text,
Pesel = PeselTextBox.Text
});
});
}
else
{
//Check if pesel already voted
if (DBHelper.CheckPeselAlreadyVoted(providedPesel))
{
errorList.Add("You have already voted.");
}
}
ea.Result = errorList;
}
}
catch (Exception)
{
MessageBox.Show(
"An error occurred while checking your data, please contact person responsible for managing the system",
"Error occured", MessageBoxButton.OK);
_mainWindow.Logout();
}
};
//If pesel is blocked or already voted, lock program for 10 seconds
_peselWorker.RunWorkerCompleted += (s, ea) =>
{
List <string> errors = (List <string>)ea.Result;
if (errors.Count > 0)
{
//Show warning overlay
_mainWindow.LoadingLabel.Foreground = ColorHelper.HexToColorBrush("#d11b1b");
_mainWindow.LoadingLabel.Content = errors.First();
_mainWindow.LoadingAdditionalLabel.Content = "Returning to login page in 10 seconds";
_mainWindow.LoadingAdditionalLabel.Visibility = Visibility.Visible;
//Count 10 seconds
int counter = 9;
Timer timer = new Timer();
timer.Interval = 1000;
timer.Elapsed += (s2, ea2) =>
{
Dispatcher.Invoke(() =>
{
_mainWindow.LoadingAdditionalLabel.Content =
$"Returning to login page in {counter} seconds";
if (counter == 0)
{
//10 seconds elapsed, stop timer, hide warning overlay, clear and unlock login form
timer.Stop();
_mainWindow.LoadingContainer.Visibility = Visibility.Collapsed;
_mainWindow.LoadingAdditionalLabel.Visibility = Visibility.Collapsed;
ClearLoginForm();
SetLoginFormEnable(true);
FirstNameTextBox.FocusOnMe();
}
});
counter--;
};
timer.Start();
}
else
{
//Login successfull
LoginSuccessful?.Invoke(this,
new LoginEventArgs()
{
FirstName = FirstNameTextBox.Text,
LastName = LastNameTextBox.Text,
Pesel = PeselTextBox.Text
});
_mainWindow.LoadingContainer.Visibility = Visibility.Collapsed;
}
};
_peselWorker.RunWorkerAsync();
}
}
catch (Exception)
{
MessageBox.Show(
"An error occurred while checking your data, please contact person responsible for managing the system",
"Error occured", MessageBoxButton.OK);
_mainWindow.Logout();
}
}