Not In Any Group Filter

[mwilday]

Prerequisites

• I am requesting the new feature to the correct repository.
• I checked the latest version on GitHub and the README.md documentation to ensure that this functionality does not already exist.
• I searched to make sure that this feature has not already been requested.
• I have, or I know someone who has, the ability and willingness to test the new feature on a Moodle LMS-based site.
• I agree to submit one feature request per issue ticket (do not submit multiple requests in one issue ticket).
• I understand that development and support is provided by volunteer(s) and that all final implementation decisions are up TNG Consulting Inc.

Feature Request - The User Story

We have a process whereby users self-select a group using a choice activity. We would like to display a particular message to users in a book activity and label when a user is not in any group. I can't seem to find any way too display a message for users who are not in any group.

Screenshots / Mock-ups

I could imagine the filter being written:
{notinanygroup} {/notinanygroup}

Alterative you have considered

We're duplicating resources and applying restrictions currently. It's a pain, but it at least works.

Additional information

No response

Planning on submitting a solution in a pull request (PR)?

No

Code of Conduct

• I have read and agree to the project's code of conduct.