/// <summary>
/// Executes the actions to check credentials and attempt to log in to the application.
/// Passwords are hashed using SHA256 before being checked against the DB to prevent
/// passwords from being stored anywhere in the application.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void LoginButton_Click(object sender, EventArgs e)
{
string username = this.usernameTextBox.Text;
using (var sha256 = SHA256.Create())
{
var hashedBytes = sha256.ComputeHash(Encoding.UTF8.GetBytes(this.passwordTextBox.Text));
string passwordHash = BitConverter.ToString(hashedBytes).Replace("-", "").ToLower();
try
{
if (this.theCredentialController.CredentialsAreValid(username, passwordHash))
{
if (this.theNurseAdminForm == null)
{
this.theNurseAdminForm = new NurseAdminForm(this);
}
else
{
this.theNurseAdminForm.SetTheLoginForm(this);
}
this.theNurseAdminForm.SetActiveUsername(username);
this.theNurseAdminForm.ShowNurseTabOnlyForAdmin();
this.theNurseAdminForm.ShowReportTabOnlyForAdmin();
this.theNurseAdminForm.ShowAppointmentsTabOnlyForNurse();
this.theNurseAdminForm.ShowVisitsTabOnlyForNurse();
this.theNurseAdminForm.ShowPatientsTabOnlyForNurse();
this.theNurseAdminForm.Show();
this.theNurseAdminForm.SetActiveUsername(usernameTextBox.Text);
this.theNurseAdminForm.SetCurrentUserOnAppointmentUserControl();
this.passwordTextBox.Text = "";
this.Hide();
}
else
{
this.errorMessageLabel.Text = "Invalid username/password";
}
}
catch (ArgumentNullException ex)
{
if (ex.ParamName == "username")
{
this.errorMessageLabel.Text = "Please enter a username";
}
else if (ex.ParamName == "password")
{
this.errorMessageLabel.Text = "Please enter a password";
}
}
}
}
/// <summary>
/// The method sets the NurseAdminForm .
/// </summary>
/// <param name="theInputedNurseAdminForm"> Inputted form </param>
public void SetNurseAdminForm(NurseAdminForm theInputedNurseAdminForm)
{
this.theNurseAdminForm = theInputedNurseAdminForm;
}
/// <summary>
/// The constructor initializes the components
/// </summary>
public LoginForm()
{
InitializeComponent();
this.theNurseAdminForm = null;
this.theCredentialController = new CredentialController();
}
