name: Add [Closed] Stale label to closed issues

on:
  issues:
    types: closed

jobs:
  add_label:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
        uses: actions/checkout@v2

      - name: Get all comments on issue
        uses: octokit/request-action@v2.x
        id: get_all_comments
        with:
          route: GET /repos/${{github.repository}}/issues/${{ github.event.issue.number }}/comments
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Identify last comment
        id: get_last_comment
        env:
          COMMENTS_OUTPUT: ${{ steps.get_all_comments.outputs.data }}
        run: |
          last_comment=$( echo "$COMMENTS_OUTPUT" | tr -d '[:cntrl:]' | jq -r '.[-1].body' )
          echo comment=$last_comment >> $GITHUB_OUTPUT

      - name: Add [Closed] Stale label
        id: add_closed_stale_label
        uses: actions-ecosystem/action-add-labels@v1
        if: contains( steps.get_last_comment.outputs.comment, 'Since this issue has been inactive for quite some time, it has now been closed.' )
        with:
          labels: "[Closed] Stale"