pr-acceptability.yml

name: PR Acceptability Check

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

permissions:
  contents: read
  issues: write

jobs:
  check-pr:
    name: Check PR library requirement
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Count books in library
        id: count
        run: |
          set -e
          echo "Detecting books in repository..."
          count=0

          # Prefer library/books.json or top-level books.json if present.
          if [ -f library/books.json ]; then
            count=$(jq 'if type=="array" then length elif .books and (.books|type=="array") then .books|length else 0 end' library/books.json 2>/dev/null || echo 0)
          elif [ -f books.json ]; then
            count=$(jq 'if type=="array" then length elif .books and (.books|type=="array") then .books|length else 0 end' books.json 2>/dev/null || echo 0)
          else
            # Fallback: count files under library/ with common extensions
            if [ -d library ]; then
              count=$(find library -type f -not -path '*/.*' \( -iname '*.md' -o -iname '*.json' -o -iname '*.txt' \) | wc -l | tr -d ' ')
            else
              count=0
            fi
          fi

          echo "Found book count: $count"
          echo "count=$count" >> $GITHUB_OUTPUT

      - name: Comment on PR and mark check result
        uses: actions/github-script@v6
        env:
          BOOK_COUNT: ${{ steps.count.outputs.count }}
        with:
          script: |
            const count = parseInt(process.env.BOOK_COUNT || '0', 10)
            const prNumber = context.payload.pull_request.number
            const owner = context.repo.owner
            const repo = context.repo.repo

            if (count >= 5) {
              const body = `✅ PR accepted: library contains ${count} book(s). Thank you for the contribution.`
              await github.rest.issues.createComment({ owner, repo, issue_number: prNumber, body })
              core.info(body)
            } else {
              const body = `❌ PR rejected: library must contain at least 5 books. Currently detected: ${count}. Please add more entries (either add files under library/ or add a books.json with an array of books).`
              await github.rest.issues.createComment({ owner, repo, issue_number: prNumber, body })
              core.setFailed(body)
            }