Api for removing multiple users from multiple courses

[Imran92]

Fixes part of #4959

Changes proposed in this Pull Request

Add REST API endpoint to add users to courses

Testing instructions

• Create a few users and a few courses

• Enroll those users to those courses, either from the UI or by using the rest API here Add REST API for adding students to courses #4968

• Get WP REST nonce (make sure you're logged in): http://devwp.local/wp-admin/admin-ajax.php?action=rest-nonce (replace devwp.local with your domain)

• Copy Cookie name and value

• Execute in terminal (replace WPNONCE, COOKIE-NAME & COOKIE-VALUE, USER_ID, COURSE_ID with actual values):

curl -X "DELETE" "http://devwp.local/?rest_route=%2Fsensei-internal%2Fv1%2Fcourse-students%2Fbatch&_wpnonce=WPNONCE" \
     -H 'Cookie: COOKIE-NAME=COOKIE-VALUE' \
     -H 'Content-Type: application/json; charset=utf-8' \
     -d $'{
  "student_ids": USER_ID,
  "course_ids": COURSE_ID
}'

Make sure you get status code 200 and your users are removed from the courses.

If you use vscode's thunder client, you can import the following collection for testing the API. Change the URL and the variables as per your system config
thunder-collection_Sensei.json.zip

[merkushin]

I think we need a better name for this method :)
Maybe batch_permissions_check?

[merkushin]

As Gabriel suggested in my PR, it might be a good idea to add tests for sad paths. WDYT?

[merkushin]

Hmm, DELETE method doesn't work for me for some reason right now (I get 405 Not Allowed). I suppose that's because of Local configuration. I'll check it one more time a bit later.

[Imran92]

Hi @merkushin , Thanks for your suggestions. I've updated the PR accordingly, can you kindly take another look? I've also added a zip in the description that you can use with vscode's Thunder Client for testing the API

[merkushin]

The problem with executing custom requests (I mean custom methods, like DELETE) was somewhere in the Nginx configuration. I failed finding the exact problem, but solved it by switching from nginx to Apache.

[merkushin]

Looks good and works well 👍