name: "Pull Request Auto Merge"

on:
  workflow_run:
    workflows: ["prbuild", "CodeQL"]
    types:
      - completed

permissions:
  contents: write
  pull-requests: write

jobs:
  Dependabot-Automerge:
    runs-on: ubuntu-latest
    # Contains workaround to execute if dependabot updates the PR by checking for the base branch in the linked PR
    # The the github.event.workflow_run.event value is 'push' and not 'pull_request'
    if: >-
      github.event.workflow_run.conclusion == 'success'
      && github.actor == 'dependabot[bot]'
      && github.event.sender.login == 'dependabot[bot]'
      && github.event.sender.type == 'Bot'
      && (github.event.workflow_run.event == 'pull_request'
          || (github.event.workflow_run.event == 'push' && github.event.workflow_run.pull_requests[0].base.ref == github.event.repository.default_branch ))
    steps:
      - name: Approve Changes and Merge changes if label 'dependencies' is set
        uses: actions/github-script@v4.0.2
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            var labelNames = await github.paginate(
              github.issues.listLabelsOnIssue,
              {
                repo: context.repo.repo,
                owner: context.repo.owner,
                issue_number: context.payload.workflow_run.pull_requests[0].number,
              },
              (response) => response.data.map(
                (label) => label.name
              )
            );

            console.log(labelNames);

            if (labelNames.includes('dependencies')) {
              console.log('Found label');

              await github.pulls.createReview({
                repo: context.repo.repo,
                owner: context.repo.owner,
                pull_number: context.payload.workflow_run.pull_requests[0].number,
                event: 'APPROVE'
              });
              console.log('Approved PR');

              await github.pulls.merge({
                repo: context.repo.repo,
                owner: context.repo.owner,
                pull_number: context.payload.workflow_run.pull_requests[0].number,
              });

              console.log('Merged PR');
            }