How to determine if Apex code is executing in an authenticated vs. unauthenticated environment (without a SOQL query)

Question

I am trying to dynamically determine, in an organization-agnostic fashion, whether Apex is executing in an authenticated environment --- whether Customer Portal, Partner Portal, Salesforce Communities, or regular logins. Basically, anything except for an unauthenticated Force.com Site login.

My understanding is that if the Apex running user does NOT have the Site Guest User license, then you are in an authenticated environment. Therefore, querying the User object for the related Profile's UserLicense record should provide this capability:

boolean isAuthenticated = [
   select Profile.UserLicense.LicenseDefinitionKey 
   from User 
   where Id = :UserInfo.getUserId() limit 1
].Profile.UserLicense.LicenseDefinitionKey != 'GUEST';

Ideally, I would like to avoid having to use a SOQL query just to get this information. Is there any other way to get this, without having to use a SOQL query? Ideally there'd be some Apex system class or programmatic check that I could run that would guarantee that I'm in an authenticated environment or not.

Answer 1

Winter '15 introduced the Auth.CommunitiesUtil class which contains a isGuestUser() for determining if the user is a guest or not.

Answer 2

Can you explore the Site class methods? I don't have Portal handy to test but Site.getName() returns null in regular "Execute Anonymous" window so it seems to be a good starting point.

Maybe something like

Boolean isAuthenticatedContext = String.isBlank(Site.getName()) ||
Site.isLoginEnabled() || Site.isRegistrationEnabled();

(no idea what do these last 2 methods return when you're on "pls register me" Site).

Another way - authenticated user should have a session Id. So maybe

Boolean isAuthenticatedContext = String.isNotBlank(UserInfo.getSessionId()) &&
!System.isBatch() && !System.isFuture() && !System.isScheduled();