Add-on to give a user permission to create additional moderators, but only in the forum they moderate


Well-known member
I'd like an add on so each sub forum can have a 'Master Moderator' as such, who can grant or revoke moderator permissions to any user they like, but only for the forum(s) they're a mod for.

In conjunction with this, I'd like like an add on (that could be the same or separate) that will allow a moderator for a forum to be able to access the notices system and to create and edit notices for only the forum(s) they're a moderator of.

Preferably free if someone has the time or inclination (I'll happily donate afterwards), although if you know you can do it an have a fixed price let me know what it would cost.

I'm not sure how complicated this would be, so I don't know how much work is involved.