main.yml

name: PR Verification Workflow

permissions:
  issues: write
  pull-requests: write

on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  verify-pr:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      
      - name: Verify File Paths, Names and Contents
        id: verify_files
        run: |
          #!/bin/bash
          set -e

          VALID=true
          EXPECTED_PATH_PATTERN="^.*_book_app/add_book_features/(create_book\.txt|list_all_books\.txt)$"

          for file in $(git diff --name-only origin/main...HEAD); do
            echo "Checking $file"

            if [[ ! $file =~ $EXPECTED_PATH_PATTERN ]] || [ ! -s "$file" ]; then
              echo "Invalid file path or empty file: $file"
              VALID=false
            fi
          done

          echo "::set-output name=valid::$VALID"

      - name: Label PR
        if: always()
        uses: actions/github-script@v5
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const isValid = ${{ steps.verify_files.outputs.valid }};
            const prNumber = context.payload.pull_request.number;
            const label = isValid === 'true' ? 'valid' : 'invalid';

            github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              labels: [label]
            });