/// <summary>
/// Handles requsts accepted by the Run method. Returns a LoginRequestResult as an IRequestresult.
/// </summary>
/// <param name="credentials">The credentials to match in the database.</param>
/// <returns> Returns a LoginRequestResult indicating the result of the request.</returns>
internal LoginRequestResult HandleLogInRequest(UserCredentials credentials)
{
User user = dbLoginHandler.GetUser(credentials);
LogInRequestStatus status = default(LogInRequestStatus);
if (user != null)
{
status = LogInRequestStatus.Success;
}
else
{
status = LogInRequestStatus.WrongCredentials;
}
return(new LoginRequestResult(status, user));
}
/// <summary>
/// Attempts server login. If success, the window belonging to the user type is opened.
/// </summary>
/// <param name="sender">The button control.</param>
/// <param name="e">Not used.</param>
private void LogInButton_Click(object sender, RoutedEventArgs e)
{
errorMessageLabel.Content = "Logging in...";
UserCredentials credentials = new UserCredentials(usernameTextBox.Text, passwordBox.Password);
User user = null;
LogInRequestStatus loginResult = LogInRequestStatus.Default;
try
{
loginResult = controller.TryLogin(credentials, out user);
}
catch (ArgumentException)
{
// Maybe log locally and transmit to server when possible.
}
switch (loginResult)
{
case LogInRequestStatus.Success:
if (user == null)
{
throw new NullReferenceException("The instance reference to the logged in user was null");
}
else if (user is TestUserType)
{
TestWindow newWindowForTestUsers = new TestWindow(user);
newWindowForTestUsers.Show();
this.Close();
}
// else if user is secretary, chairman etc.: Open the appropriate window.
break;
case LogInRequestStatus.WrongCredentials:
errorMessageLabel.Content = "Username or password incorrect. Please try again.";
break;
//case LoginAttemptResult.NetworkError:
// errorMessageLabel.Content = "Could not contact server du to a network error. Please try again later.";
// break;
case LogInRequestStatus.Default: // Fall through:
default:
errorMessageLabel.Content = "An unexpected error occurred. Please try again.";
break;
}
}
/// <summary>
/// Initializes a new instance of this class.
/// </summary>
/// <param name="status">The status of the log in attempt.</param>
/// <param name="user">[OPTIONAL] The user to log in.</param>
public LoginRequestResult(LogInRequestStatus status, User user = null)
{
this.status = status;
this.user = user;
}
