Remove Former Staff From Communities

When a user transitions to “former staff”, remove them from communities.

Product Backlog Description

As an administrator working in KARL directly or in an external system sync’ing users with KARL (i.e. GSA), when I remove the KarlStaff role on a user, the user is automatically removed from all their communities.

Specification

1. (Web) A user profile is edited by an administrator as described in notify-former-staff-moderators and the option to remove them from communities is triggered.
2. (GSA) Alternatively, a record in GSA sync indicates that a user that previously had the KarlStaff group, no longer does.
3. Find all the communities that person is a member/moderator in and remove them from the membership of the community.
4. Clean up any alert preferences as appropriate.

Questions

1. What if the former staff user is the sole moderator of a community? Should we prevent the action from taking place in the web version of this story? What do we do with the GSA background process, which doesn’t have a user sitting in front of it to send an error to?