pr_notification.yml

name: GSI Chatroom PR Notification

on:
  pull_request:
    types: [review_requested]

permissions:
  contents: read

jobs:
  notify-pull-request:
    runs-on: ubuntu-latest
    steps:
      - name: Pull Request Details
        run: |
          echo "Pull Request: ${PR_NUMBER}"
          echo "Author: ${AUTHOR}"
        env:
          PR_NUMBER: ${{ github.event.pull_request.number }}
          AUTHOR: ${{ github.event.pull_request.user.login }}

      - name: Google Chat Notification
        continue-on-error: true
        shell: bash
        env:
          WEBHOOK_URL: ${{ secrets.WEBHOOK_URL }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
          TITLE: ${{ github.event.pull_request.title }}
          LABELS: ${{ join(github.event.pull_request.labels.*.name, ', ') }}
          REPO: ${{ github.event.pull_request.head.repo.full_name }}
          CREATOR: ${{ github.event.pull_request.user.login }}
          STATE: ${{ github.event.pull_request.state }}
          ASSIGNEES: ${{ join(github.event.pull_request.assignees.*.login, ', ') }}
          REVIEWERS: ${{ join(github.event.pull_request.requested_reviewers.*.login, ', ') }}
          URL: ${{ github.event.pull_request.html_url }}
        run: |
          if [ -z "$WEBHOOK_URL" ]; then
            echo "WEBHOOK_URL secret is not set (e.g. fork PR). Skipping notification."
            exit 0
          fi
        
          PAYLOAD=$(jq -n \
            --arg pr_num "$PR_NUMBER" \
            --arg title "$TITLE" \
            --arg labels "$LABELS" \
            --arg repo "$REPO" \
            --arg creator "$CREATOR" \
            --arg state "$STATE" \
            --arg assignees "$ASSIGNEES" \
            --arg reviewers "$REVIEWERS" \
            --arg url "$URL" \
            '
            def guard(val): if (val == null or val == "") then "None" else val end;
            def guard_list(val): if (val == null or val == "") then "None" else "- " + val end;
            {
              cardsV2: [
                {
                  cardId: "prNotificationCard",
                  card: {
                    header: {
                      title: "Pull request notification",
                      subtitle: ("Pull request: #" + guard($pr_num))
                    },
                    sections: [
                      {
                        widgets: [
                          { decoratedText: { topLabel: "Repo", text: guard($repo) } },
                          { decoratedText: { topLabel: "Title", text: guard($title) } },
                          { decoratedText: { topLabel: "Creator", text: guard($creator) } },
                          { decoratedText: { topLabel: "State", text: guard($state) } },
                          { decoratedText: { topLabel: "Assignees", text: guard_list($assignees) } },
                          { decoratedText: { topLabel: "Reviewers", text: guard_list($reviewers) } },
                          { decoratedText: { topLabel: "Labels", text: guard_list($labels) } },
                          {
                            buttonList: {
                              buttons: [
                                {
                                  text: "Open Pull Request",
                                  onClick: {
                                    openLink: {
                                      url: $url
                                    }
                                  }
                                }
                              ]
                            }
                          }
                        ]
                      }
                    ]
                  }
                }
              ]
            }')

          RESPONSE=$(curl --fail-with-body --location --request POST "$WEBHOOK_URL" \
            --header 'Content-Type: application/json; charset=UTF-8' \
            --data-raw "$PAYLOAD" 2>&1) || {
              echo "Failed to send Google Chat notification:"
              echo "$RESPONSE"
              exit 1
          }