public LoginModalPage()
{
login = new LoginPage();
create = new CreateAccountPage();
this.Children.Add(login);
this.Children.Add(create);
MessagingCenter.Subscribe<ContentPage>(this, "Login", (sender) =>
{
this.SelectedItem = login;
});
MessagingCenter.Subscribe<ContentPage>(this, "Erstellen", (sender) =>
{
this.SelectedItem = create;
});
}
/// <summary>
/// Checks: if Empty Email or password, if valid Email, if valid Login. Password Entry is set as isPassword and the shown Passworddigits only contains zeros. Password will be stored as SHA512StringHash
/// </summary>
public LoginPage()
{
BackgroundColor = new Color(255, 255, 255, 1);
var button = new Button { Text = "Login", BackgroundColor = Color.FromHex("006AB3") };
button.Clicked += async (sender, e) =>
{
//Checks if the Entry for username or password is empty
if (String.IsNullOrEmpty(username.Text) || String.IsNullOrEmpty(password.Text))
{
password.Text = "";
await DisplayAlert("Abfragefehler", "E-Mail und Passwort bitte angeben", "Neue Eingabe");
return;
}
//Checks if the Email Entry is receiving a valid Email String
if (!IsValidEmail(username.Text))
{
password.Text = "";
await DisplayAlert("Ungültige E-Mail", "E-Mail ist in einem ungültigen Format angegeben worden", "Neue Eingabe");
return;
}
// Converts Password in SHA512StringHash
string passwordHash = DependencyService.Get<IHash>().Sha512StringHash(password.Text);
// Sets the Passworddigits to zero after receiving a letter
password.Text = new string('0', password.Text.Length);
User validUser = await IsValidLogin(new User(username.Text, passwordHash));
// Checks with null parameter if user is valid
if (null == validUser)
{
password.Text = "";
if (_exception)
await DisplayAlert("Verbindungsfehler", "Server ist nicht erreichtbar. Internetzugang aktiv?", "OK");
else
await DisplayAlert("Ungültiger Login", "E-Mail oder Passwort falsch angegeben", "Neue Eingabe");
}
else
{
localFileSystem file = new localFileSystem();
App.Current.Login(validUser);
if (!DependencyService.Get<ISaveAndLoad>().FileExist(DependencyService.Get<ISaveAndLoad>().PathCombine(file.AdjustPath( validUser.user_Email), "PContent")))
{
Debug.WriteLine("getphath2 " + DependencyService.Get<ISaveAndLoad>().Getpath(""));
await DisplayAlert("Neue Anmeldung", "Sie haben sich an einem neuen Gerät angemeldet. Daten werden runtergeladen", "OK");
CreateAccountPage cap = new CreateAccountPage();
await cap.DownloadInitialContent(validUser);
}
await Navigation.PushModalAsync(new NavigationPage(new MainMenuPage(validUser)));
}
};
var create = new Button { Text = "Account erstellen", BackgroundColor = Color.FromHex("E2001A") };
create.Clicked += (sender, e) =>
{
MessagingCenter.Send<ContentPage>(this, "Erstellen");
};
//Receives the CurrentUser and Set the Entry field as the Email from the last user with a valid Login
username = new Entry { Text = App.Current.CurrentUser != null ? App.Current.CurrentUser.user_Email : "", BackgroundColor = Color.FromHex("3f3f3f") };
password = new Entry { Text = "", BackgroundColor = Color.FromHex("3f3f3f"), IsPassword = true };
Content = new StackLayout
{
Padding = new Thickness(10, 40, 10, 10),
//VerticalOptions = LayoutOptions.Center,
Children = {
new Label { Text = "Login", TextColor = Color.FromHex("006AB3"), FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)) },
new Label { Text = "E-Mail", TextColor = Color.FromHex("000000")},
username,
new Label { Text = "Passwort", TextColor = Color.FromHex("000000")},
password,
button, create
}
};
}
