name: Comment on pull request

on:
  workflow_run:
    workflows: [Prettier code formatter]
    types:
      - completed

jobs:
  comment:
    # available images: https://github.com/actions/runner-images#available-images
    runs-on: ubuntu-latest
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion == 'failure'
    steps:
      - name: Download artifact
        uses: actions/github-script@v7
        with:
          script: |
            var artifacts = await github.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: ${{github.event.workflow_run.id }},
            });
            var matchArtifact = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "HTML Diff"
            })[0];
            var download = await github.actions.downloadArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: matchArtifact.id,
              archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{github.workspace}}/HTML Diff.zip', Buffer.from(download.data));
      - name: Unzip artifact
        run: unzip HTML\ Diff.zip
      - name: PR comment with html diff
        # https://docs.github.com/en/actions/learn-github-actions/expressions#failure-with-conditions
        uses: thollander/actions-comment-pull-request@v2
        with:
          filePath: diff.html