async private void OnRefreshButtonClick(object sender, EventArgs e)
{
refreshButton.Enabled = false; // Disable refresh button and show loading
loadingLabel.Show();
loadingLabel.Text = "Loading your homework, please wait...";
progressBar.Show();
label3.Show();
tabController.Hide();
Homework[] tasks = await APIHandler.GetHomework(student : user, groupHardRefresh : true);
tabController.UpdateTabs(disposeCurrentTabs: true, newTasks: tasks); // Provide new data to the tab controller
this.user = await APIHandler.GetStudent(id : this.user.id); // Update student
DecorateForm(); // Update the form accordingly (e.g. new ALPs grade, username)
// TODO: Show error to re-sign-in if a teacher changes username whilst student using the program
refreshButton.Enabled = true;
loadingLabel.Hide();
progressBar.Hide();
label3.Hide();
tabController.Show();
}
async private void studentSignInClick(object sender, EventArgs e)
{
/// <summary>
/// Subroutine that is executed when a student wants to sign into the program.
/// It sends a GET request to the API to try and obtain student details.
/// </summary>
string username = usernameTextBox.Text;
string password = passwordTextBox.Text;
flushTextBoxes();
if (checkBox1.Checked)
{
if (username == "")
{
MessageBox.Show("Username cannot be left blank!");
return;
}
StudentGetPassword passwordForm = new StudentGetPassword();
var dialog = passwordForm.ShowDialog();
if (dialog == DialogResult.OK)
{
password = passwordForm.passwordResult;
}
else
{
MessageBox.Show("An error has occurred, please try again.");
return;
}
// Send request to API to change password of `username` to `password`
try {
await APIHandler.ResetPassword(username, password);
string newCredentials = WebRequestHandler.ConvertToBase64(username + ":" + password);
WebRequestHandler.SetAuthorizationHeader(newCredentials);
Student student = await APIHandler.GetStudent(username : username); // Get the student with username `username` from the API
closedByProgram = true; // Set boolean to prevent Application.Exit() call
this.Close(); // Close current form
FormController.studentMain = new StudentMainForm(student); // Open the new form
} catch (HttpStatusUnauthorized) {
MessageBox.Show("Your account already has a password - please ask a teacher to reset your password.");
return;
}
}
else
{
if (username == "" || password == "")
{
MessageBox.Show("Username or password cannot be left blank!"); //TODO: Does this need a messagebox? Nicer way of showing error?
return; // Do not execute more of the subroutine
}
string credentials = WebRequestHandler.ConvertToBase64(username + ":" + password);
APIHandler.SetAuthorizationHeader(credentials);
if (await APIHandler.IsUserValid(UserType.Student, username, password))
{
Student student = await APIHandler.GetStudent(username : username); // Get the student with username `username` from the API
closedByProgram = true; // Set boolean to prevent Application.Exit() call
this.Close(); // Close current form
FormController.studentMain = new StudentMainForm(student); // Open the new form
}
else
{
MessageBox.Show("Your account doesn't exist.");
}
}
}