Check if new commits do not remove members

[JoeySpronck]

Now it could be that people remove members once they leave. But the profile page should be set to inactive. And member should be added to former employees.

[keelinm]

build should fail if a member page is deleted (during build, check the list of existing member pages and previous member pages and verify one is not removed??)

[drepeeters]

I've tried using the GitPython API to check for differences between new and previous commits. With a locap git repository it was able to detect deleted files. However, while running in a github workflow a new 'local' repository is created inside a docker I believe. Therefore this new 'local' repository can be seen as the first version and therefore has no previous version to compare differences with.

[drepeeters]

As you may have seen I was able to post notification in the webteam channel. However, it also posted a notification in case a new member file is added. This is ofcourse not what we want, this was the result of a forgotten "if-statement" in the workflow action.

The following code has to be updated so that it include an if-statement associated with a deleted file:

name: Member removal notification
on:
  push:
    branches: 
      - main
    paths:
      - 'contents/**'
  workflow_dispatch:

jobs:
  notify:
    runs-on: ubuntu-latest
    steps:        
      - name: Notify dedicated teams channel
        if: **insert if-statement here**
        uses: jdcargile/ms-teams-notification@v1.3
        with:
          github-token: ${{ github.token }} # this will use the runner's token.
          ms-teams-webhook-uri: ${{ secrets.TEAMS_CHANNEL_WEBHOOK_URL }}
          notification-summary: 'Warning! A member file has been removed. Contact someone from the Webteam and make sure the member is added back.'
          notification-color: 17a2b8