Redirect user to either admin or frontend based on login status

Question

I want to build a custom controller, which works as follows:

1. if user already have admin session, redirect user to admin page A
2. if user does not have admin session, redirect user to storefront page B

Is there a way to achieve this?

First I tried building custom logic in adminhtml/controller but it didn't work because for case (2), magento shows admin login UI even before any of my controller logic runs. Then I tried building custom logic in frontend controller but that won't work for case (1) because it's not possible from frontend to tell admin session ( How to get admin session(user) details on front side in Magento 2? )

Any advise would be appreciated.

Answer 1

Try to use event controller_action_predispatch as it calls before any controller action dispatch