if user has posted in a specific forum

[Dr.CustUmz]

is there a condition that exists already for detecting if a user has posted in a specific forum? I want to provide a link in the navbar if they have not posted in a certain forum. I was looking into how to be able to detect it:
post > threadid & userid
thread > threadid & forumid

which I could make something with, just dont feel a need to add queries to something that may exist already, so was wondering if anyone knew a way to detect if the user has posted in a specific forum.

--------------- Added [DATE]1611812996[/DATE] at [TIME]1611812996[/TIME] ---------------

I have just went ahead and made a function with the following query to solve this:

SELECT count(postuserid) as count
FROM thread
WHERE postuserid = " . $vbulletin->userinfo['userid'] . "
AND forumid = 5
AND lastposter != " . $vbulletin->userinfo['username'] . "