/// <summary>
/// Runs when the registration button is clicked in order to register a new user.
/// </summary>
private void btnRegister_Click(object sender, EventArgs e)
{
// Check if any information has not been entered
if (txtRegisterFirstName.Text == "" || txtRegisterLastName.Text == "" ||
txtRegisterCity.Text == "" || txtRegisterUsername.Text == "" ||
txtRegisterPassword.Text == "")
{
// Show an error if any information is missing
MessageBox.Show("Please fill all fields to register.");
}
// Check if the username is already taken
else if (!network.IsUsernameAvailable(txtRegisterUsername.Text))
{
// Show an error if the username is taken
MessageBox.Show("Username is already taken. Please enter a different one.");
}
// If all information was entered and is valid, register the new user
else
{
// Instantiate a new Person object with the given information
Person newUser = new Person(txtRegisterFirstName.Text,
txtRegisterLastName.Text,
txtRegisterCity.Text,
txtRegisterUsername.Text,
txtRegisterPassword.Text);
// Add the new user to the network
network.AddNewUser(newUser);
// Instantiate a new MainUIForm object with the new user and given network
MainUIForm frmUI = new MainUIForm(network, newUser);
// Show the main user interface form
frmUI.ShowDialog();
// Close the login form
this.Close();
}
}
/// <summary>
/// Runs when the login button is clicked in order to authenticate the user.
/// </summary>
private void btnLogin_Click(object sender, EventArgs e)
{
// Get the username and password entered into the textboxes
string username = txtLoginUsername.Text, password = txtLoginPassword.Text;
// If no username was entered, display an appropriate error message
if (username == "")
{
MessageBox.Show("Please enter a username.");
}
// Otherwise, if no password was entered, display an appropriate error message
else if (password == "")
{
MessageBox.Show("Please enter a password.");
}
// Otherwise, try to authenticate the user
else
{
// Try to find the user with the given credentials in the network
Person user = network.FindUserInNetwork(username, password);
// Instantiate the main user interface if a user was found (is not null)
if (user != null)
{
// Instantiate the user interface
MainUIForm frmUI = new MainUIForm(network, user);
// Display the user interface
frmUI.ShowDialog();
// Close the login form
this.Close();
}
// Otherwise, the user was not found in the network, so display an appropriate error message
else
{
MessageBox.Show("Invalid login information. Please try again.");
}
}
}