public async Task<AuthenticationResult> AuthenticateAsync(AuthNProviderType providerType,
IAuthNProviderSettings providerSettings)
{
// try without sending AMS Application key for now
_mobileSvcsClient = new
MobileServiceClient(providerSettings.UrlToAuthenticationProvider);
// default to MS account if whatever passed in is a no go
// TODO: See Azure Mobile GitHub to see how they check for invalid Enum values
var azmobProvider = MobileServiceAuthenticationProvider.MicrosoftAccount;
// see which Azure Mobile Services Authentication Provider they want to use
switch (providerType)
{
case AuthNProviderType.Google:
azmobProvider = MobileServiceAuthenticationProvider.Google;
break;
case AuthNProviderType.Facebook:
azmobProvider = MobileServiceAuthenticationProvider.Facebook;
break;
case AuthNProviderType.Twitter:
azmobProvider = MobileServiceAuthenticationProvider.Twitter;
break;
case AuthNProviderType.Microsoft:
azmobProvider = MobileServiceAuthenticationProvider.MicrosoftAccount;
break;
default:
break;
}
try
{
await _mobileSvcsClient.LoginAsync(azmobProvider);
// TODO: How do I want to use User Profile Stuff here?
// TODO: I will doouble set stff to see how it feels to use each
var userProfile = await LoadUserProfile();
var authResult = new AuthenticationResult
{
ProviderName = _mobileSvcsClient.ToString(),
IdentityString = _mobileSvcsClient.CurrentUser.UserId,
MobileServicesUserToken = _mobileSvcsClient.CurrentUser.MobileServiceAuthenticationToken
};
return authResult;
}
catch (InvalidOperationException iop)
{
// TODO: if I try to login to Twitter and click back button on WP8
// TODO: then System.InvalidOperationException is thrown but is NOT caught in Login VM!?? Why?
// TODO: Must the try catch be inside here in the platform-specific authprovider?
// TODO: Seems like that is the case, so leave it?
// TODO: Do something useful
//user cancelled so try again
//MessageBox.Show("You must login to access the application.", "Please try again", MessageBoxButton.OK);
Debug.WriteLine(
"AuthenticationProvider:InvalidOpException: You must login to access the application.");
}
catch (Exception ex)
{
// TODO: Do something useful
//MessageBox.Show("We were not able to log you in, make sure you are connected to the internet and try again.", "Login failed", MessageBoxButton.OK);
Debug.WriteLine(
"AuthenticationProvider:Exception: not able to log you in, make sure you are connected to the internet.");
}
finally
{
Debug.WriteLine("AuthenticationProvider:AuthenticateAsync: finally in try catch...got here!");
}
// TODO: how do I want to handle?
// if I got here then something bad happened
// TODO: Something besides null?
return null;
}