web-pr.yml

name: Web App - PR Preview
on:
  pull_request:
    branches: 
        - main
    paths:
      - "web-app/**"
      - "functions/**"
      - ".github/workflows/web-*.yml"
jobs:
  deploy-web-app:
    name: Deploy Web App
    uses: ./.github/workflows/web-app-deployer.yml
    with:
      FIREBASE_PROJECT: dev
      PREVIEW_DEPLOYMENT: true
      PREVIEW_HOST_NAME: "pr-${{ github.event.number }}"
    secrets: inherit

  update-pr-comment:
    name: Update PR comments
    runs-on: ubuntu-latest
    needs: [ deploy-web-app ]
    env:
      PR_ID: ${{ github.event.number }}
    steps:
      - name: Check for Existing Comment
        id: check-comment
        run: |
          HOSTING_URL=$(echo "$HOSTING_URL_64" | base64 -d)
          COMMENT="Preview Firebase Hosting URL: $HOSTING_URL"
          echo "PR comment: $COMMENT"
          COMMENTS=$(curl -s -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" -H "Accept: application/vnd.github.v3+json" "https://api.github.com/repos/${{ github.repository }}/issues/${{ env.PR_ID }}/comments")
          JQ_CHECK=`echo "$COMMENTS" | jq -r ".[] | select(.body == \"$COMMENT\")"`
          if [ -z "$JQ_CHECK" ]; then
              echo "Comment does not exist."
              echo "comment_exists=false" >> $GITHUB_OUTPUT
          else
              echo "Comment already exists."
              echo "comment_exists=true" >> $GITHUB_OUTPUT
          fi
        env:
          HOSTING_URL_64: ${{ needs.deploy-web-app.outputs.hosting_url }}

      - name: Comment on PR with Hosting URL (PR Preview)
        if: steps.check-comment.outputs.comment_exists == 'false'
        run: |
          HOSTING_URL=$(echo "$HOSTING_URL_64" | base64 -d)
          COMMENT="Preview Firebase Hosting URL: $HOSTING_URL"
          echo "$COMMENT" > comment.txt
          curl -d "{\"body\":\"$(cat comment.txt)\"}" -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" -H "Content-Type: application/json" -X POST "https://api.github.com/repos/${{ github.repository }}/issues/${{ env.PR_ID }}/comments"
        env:
          HOSTING_URL_64: ${{ needs.deploy-web-app.outputs.hosting_url }}