auto-assign-reviewers-to-pr.yaml

name: Assign Reviewer as Assignee

on:
  workflow_run:
    workflows:
      - "Pull Request Reviewed"
    types:
      - completed

permissions:
  issues: write
  pull-requests: write

jobs:
  assign_reviewer:
    runs-on: ubuntu-latest
    steps:
      - name: Get Artifact
        id: get_artifact
        continue-on-error: true
        uses: dawidd6/action-download-artifact@07ab29fd4a977ae4d2b275087cf67563dfdf0295 # v9
        with:
          github_token: ${{secrets.GITHUB_TOKEN}}
          workflow: pull-request-reviewed.yaml

      - name: env_vars
        id: env_vars
        if: steps.get_artifact.outcome == 'success'
        run: |
          echo "reviewer=$(cat artifact/reviewer.txt)" >>${GITHUB_OUTPUT}
          echo "reviewState=$(cat artifact/reviewstate.txt)" >>${GITHUB_OUTPUT}
          echo "prNumber=$(cat artifact/prnumber.txt)" >>${GITHUB_OUTPUT}

      - name: Assign the reviewer as assignee when changes are requested
        uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410 # v6.4.1
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const reviewer = '${{ steps.env_vars.outputs.reviewer }}';
            const prNumber = parseInt('${{ steps.env_vars.outputs.prNumber }}', 10);
            const reviewState = '${{ steps.env_vars.outputs.reviewState }}';
            const repo = '${{ github.event.repository.name }}';
            const owner = '${{ github.event.repository.owner.login }}';

            if (reviewState === 'changes_requested') {
              console.log(`Assigning reviewer: ${reviewer} to PR #${prNumber} as changes were requested.`);
              await github.rest.issues.addAssignees({
                owner: owner,
                repo: repo,
                issue_number: prNumber,
                assignees: [reviewer],
              });
            } else {
              console.log(`No action taken. Review state is '${reviewState}'.`);
            }