post-vercel-comment.yml

name: Sprig Review Preview Links

on:
  pull_request:
    types: [opened, synchronize]

jobs:
  post-vercel-preview-comment:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout Repository
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Get list of changed files
        id: changed-files
        run: |
          echo "Pull Request Base SHA: ${{ github.event.pull_request.base.sha }}"
          echo "Pull Request Head SHA: ${{ github.event.pull_request.head.sha }}"
          js_files=$(git diff --name-only --diff-filter=AM --find-renames --find-copies ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} | grep 'games/.*\.js$' | xargs)
          first_js_file=$(basename "$js_files" .js)
          echo "FIRST_JS_FILE=$first_js_file" >> $GITHUB_ENV

      - name: Fetch existing comments on the pull request
        id: fetch-comments
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PR_NUMBER=$(echo "${{ github.ref }}" | grep -oE "[0-9]+")
          COMMENTS_URL="https://api.github.com/repos/${{ github.repository }}/issues/$PR_NUMBER/comments"
          COMMENTS=$(curl -s -H "Authorization: token $GITHUB_TOKEN" $COMMENTS_URL)
          echo "$COMMENTS" > comments.json

      - name: Check if comment already exists
        id: check-comment
        run: |
          COMMENT_EXISTS=$(cat comments.json | grep -c "/gallery/beta/${{ env.FIRST_JS_FILE }}")
          if [ $COMMENT_EXISTS -ne 0 ]; then
            echo "Comment already exists. Skipping."
            exit 0

      - name: Construct Preview URL and Post Comment
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PROJECT_NAME: "sprig"
          BRANCH_NAME: "${{ github.head_ref }}"
          FORK_AUTHOR: "${{ github.event.pull_request.head.user.login }}"
          DOMAIN: "hackclub.dev"
          JS_FILE: ${{ env.FIRST_JS_FILE }}
          IS_FORK: ${{ github.event.pull_request.head.repo.full_name != github.repository }}
        run: |
          PR_NUMBER=$(echo "${{ github.ref }}" | grep -oE "[0-9]+")
          
          if [ "${IS_FORK}" = "true" ]; then
            PREVIEW_URL="https://${PROJECT_NAME}-git-fork-${FORK_AUTHOR}-${BRANCH_NAME}.${DOMAIN}"
          else
            PREVIEW_URL="https://${PROJECT_NAME}-git-${BRANCH_NAME}.${DOMAIN}"
          fi
          
          COMMENT_BODY="Your Game Preview is Available at [${PREVIEW_URL}/gallery/beta/${JS_FILE}](${PREVIEW_URL}/gallery/beta/${JS_FILE})"
          
          curl -s -H "Authorization: token $GITHUB_TOKEN" \
            -X POST \
            -d "{\"body\": \"$COMMENT_BODY\"}" \
            "https://api.github.com/repos/${{ github.repository }}/issues/$PR_NUMBER/comments"