private async void OnSubmitBtnClicked(object sender, EventArgs args)
{
DisableUI(); // Disable UI
var usernameText = UsernameEntry.Text;
var passwordText = PasswordEntry.Text;
var confirmText = ConfirmEntry.Text;
var language = items[LanguagePicker.SelectedIndex];
if (!string.IsNullOrEmpty(usernameText) &&
!string.IsNullOrEmpty(passwordText) &&
passwordText == confirmText &&
!string.IsNullOrEmpty(language))
{
ConnectivityHandler conHandler = new ConnectivityHandler();
bool isConnected = await conHandler.IsConnected();
if (isConnected)
{
var users = await AppContext.Repository.GetAsync <User>(x => x.Username == usernameText);
bool userExists = false;
if (users != null)
{
var oldUser = users.FirstOrDefault();
if (oldUser != null)
{
userExists = true;
}
}
if (userExists)
{
RegisterCallbackLabel.Text = "User named " + usernameText + " exists";
EnableUI(); // Enable UI
}
else
{
var newUser = new User();
newUser.Username = usernameText;
newUser.Password = passwordText;
newUser.CodingLanguage = language;
try
{
await AppContext.Repository.InsertAsync(newUser);
RegisterCallbackLabel.TextColor = Color.Green;
RegisterCallbackLabel.Text = "User has been registered successfully";
EnableUI(); // Enable UI
}
catch (Exception ex)
{
RegisterCallbackLabel.Text = "User Insert Error: " + ex;
EnableUI(); // Enable UI
}
}
}
else
{
RegisterCallbackLabel.Text = "No Internet Connection";
EnableUI(); // Enable UI
}
}
else
{
RegisterCallbackLabel.Text = "Empty or Invalid Inputs";
EnableUI(); // Enable UI
}
}
private async void OnLoginBtnClicked(object sender, EventArgs args)
{
DisableUI(); // Disable UI
var usernameText = UsernameEntry.Text;
var passwordText = PasswordEntry.Text;
if (!string.IsNullOrEmpty(usernameText) && !string.IsNullOrEmpty(passwordText))
{
ConnectivityHandler conHandler = new ConnectivityHandler();
bool isConnected = await conHandler.IsConnected();
if (isConnected)
{
var users = await AppContext.Repository.GetAsync <User>(x => x.Username == usernameText);
if (users == null)
{
LoginCallbackLabel.Text = "Username doesn't exist";
EnableUI(); // Enable UI
}
else
{
var user = users.FirstOrDefault();
if (user == null)
{
LoginCallbackLabel.Text = "Username doesn't exist";
EnableUI(); // Enable UI
}
else
{
if (PasswordEntry.Text == user.Password)
{
LoginCallbackLabel.TextColor = Color.Green;
LoginCallbackLabel.Text = "Map page loading..";
//Set stored data
Application.Current.Properties["loggedUser"] = JsonConvert.SerializeObject(user);
await Application.Current.SavePropertiesAsync();
//GOTO: MapPage
Navigation.InsertPageBefore(new MapPage(AppContext), this);
Navigation.RemovePage(this);
//After login
await AppContext.InitializeLoginAsync(user);
}
else
{
LoginCallbackLabel.Text = "Wrong password";
EnableUI(); // Enable UI
}
}
}
}
else
{
LoginCallbackLabel.Text = "No Internet Connection";
EnableUI(); // Enable UI
}
}
else
{
LoginCallbackLabel.Text = "Username and password must be filled";
EnableUI(); // Enable UI
}
}