Allowing users to add taxonomy terms but requiring administrators to verify them

Question

I would like to allow users to add new taxonomy terms, but I would like this to be verified by an administrator. The way I envision this working would have a user filling out a form which would send a notification to the specified admin; then, if the admin accepted the users request some hook or method would be triggered that would create the new taxonomy term.

Is there way to do this kind of thing with Drupal?

Answer 1

Brainstorming here...now that taxonomy is part of the entity system, it should be possible to do something like this:

1. Install http://drupal.org/project/workflow
2. Add a field to your taxonomy called "Published" or "Approved" that is a boolean checkbox
3. Setup a workflow that is triggered on taxonomy term creation with Approved as a field only accessible to admins
4. Write a hook into taxonomy terms that removes a term unless it is approved (this is the tricky part - there are a lot of ways to get to taxonomy terms, so this might make this approach moot).

Alternative: Since you mentioned a user filling out a form - you could pretty easily have a content type called "Taxonomy Term" or something with the needed Taxonomy fields, then use workflow/Rules to send the submission to an admin, upon approval use Rules or custom code to create a new taxonomy term.

Answer 2

I never did something like this, but my approach would be to create a "proposed taxonomy term" content type and model the logic via the Rules module.