How to use Subscriptions in Suppression BAdI?

Hi experts!

I want to use subscriptions as conditions in Suppression BAdI:

If a user has permission for subscription with ID = 12, then we should check if there are at least 1 interactions 'EMAIL_OUTBOUND' for last 7 days, then the supression rule will apply.

Help to compose the BAdI with that condition. I'm having difficulty with first subscription check in the condition