async void SignInProcedure(object sender, EventArgs e)
{
LoginView user = new LoginView {
Email = Entry_Username.Text,
Password = Entry_Password.Text
};
//check for InternetConnection before calling the webserver
if (!Lbl_NoInternet.IsVisible)
{
if (user.CheckNullInformation())
{
Token result;
try
{
//Login API call
result = await App.RestService.Login(user);
}
catch (NullReferenceException)
{
result = null;
}
catch (TaskCanceledException)
{
result = null;
await DisplayAlert("Login", "Not able to reach server in time.", "Ok");
}
//if the login was successful
if (result != null)
{
//make sure previous token is deleted
if (App.TokenDatabase.GetToken() != null)
{
App.TokenDatabase.DeleteToken(0);
}
//save token for current user
App.TokenDatabase.SaveToken(result);
//retrieve info about the user who logges in
UserDto userdto;
try
{
userdto = await App.RestService.FindUserByEmail(new FindUserByEmailViewModel { Email = user.Email });
}
catch (NullReferenceException)
{
userdto = null;
}
catch (TaskCanceledException)
{
userdto = null;
await DisplayAlert("Login", "Not able to reach server in time.", "Ok");
}
//prepare user obj for saving in local db
User usr;
if (userdto == null)
{
await DisplayAlert("Login", "Not able to get user data from server.", "Ok");
//TODO: try to reach server later
usr = new User
{
RemoteId = user.Email,
FirstName = user.Email,
LastName = user.Email,
Email = user.Email,
Password = user.Password,
BirthDate = DateTime.Now,
Gender = user.Email
};
}
else
{
usr = new User
{
RemoteId = userdto.RemoteId,
FirstName = userdto.FirstName,
LastName = userdto.LastName,
Email = user.Email,
Password = user.Password,
BirthDate = userdto.BirthDate,
Gender = userdto.Gender
};
}
//make sure previous user is deleted
if (App.UserDatabase.GetUser() != null)
{
App.UserDatabase.DeleteUser(0);
}
//save current logged user in local DB
App.UserDatabase.SaveUser(usr);
//navigate to dashboard
if (Device.RuntimePlatform == Device.Android)
{
Application.Current.MainPage = new Dashboard(new HomePage());
}
else if (Device.RuntimePlatform == Device.iOS)
{
await Navigation.PushModalAsync(new Dashboard(new HomePage()));
}
}
else
{
await DisplayAlert("Login", "Login not correct: wrong username or password.", "Ok");
}
}
else
{
await DisplayAlert("Login", "Login not correct: empty username or password.", "Ok");
}
}
else
{
await DisplayAlert("Login", "No internet. Cannot reach the server. Please connect in order to login.", "Ok");
}
}
