pr-review-notification.yml

name: PR Review Slack Notification
on:
  pull_request_review:
    types: [submitted]
jobs:
  notify_pr_author:
    runs-on: ubuntu-latest
    env:
      SLACK_WEBHOOK_URL: ${{ secrets.SLACK_PR_REVIEW_WEBHOOK_URL }}
      SLACK_IDS: ${{ secrets.SLACK_IDS }}
    steps:
    - name: PR 리뷰 시 Slack 알림 보내기
      run: |
        set -e
        PR_TITLE="${{ github.event.pull_request.title }}"
        PR_URL="${{ github.event.pull_request.html_url }}"
        PR_AUTHOR="${{ github.event.pull_request.user.login }}"
        REVIEW_STATE="${{ github.event.review.state }}"
        REVIEWER="${{ github.event.review.user.login }}"
        
        # Parse SLACK_IDS as JSON
        SLACK_IDS_JSON=$(echo "$SLACK_IDS" | jq -r '.' 2>/dev/null || echo "{}")
        if [ "$SLACK_IDS_JSON" == "{}" ]; then
          echo "Warning: SLACK_IDS is not a valid JSON. Attempting to parse as a string."
          SLACK_IDS_JSON=$(echo "$SLACK_IDS" | sed 's/^"//; s/"$//' | jq -R 'split(",") | map(split(":")) | from_entries' 2>/dev/null || echo "{}")
          if [ "$SLACK_IDS_JSON" == "{}" ]; then
            echo "Error: Failed to parse SLACK_IDS as JSON or string. Please check the format."
            exit 1
          fi
        fi
        
        get_slack_id() {
          local github_username="$1"
          echo "$SLACK_IDS_JSON" | jq -r --arg user "$github_username" '.[$user] // empty'
        }
        
        author_slack_id=$(get_slack_id "$PR_AUTHOR")
        reviewer_slack_id=$(get_slack_id "$REVIEWER")
        
        if [ -n "$author_slack_id" ]; then
          author_mention="<@$author_slack_id>"
        else
          author_mention="$PR_AUTHOR"
          echo "Warning: No Slack ID found for PR author $PR_AUTHOR" >&2
        fi
        
        if [ -n "$reviewer_slack_id" ]; then
          reviewer_mention="<@$reviewer_slack_id>"
        else
          reviewer_mention="$REVIEWER"
          echo "Warning: No Slack ID found for reviewer $REVIEWER" >&2
        fi
        
        case "$REVIEW_STATE" in
          "changes_requested")
            message="$author_mention님, $reviewer_mention님이 PR에 변경을 요청했습니다: <$PR_URL|$PR_TITLE>"
            ;;
          "commented")
            message="$author_mention님, $reviewer_mention님이 PR에 댓글을 달았습니다: <$PR_URL|$PR_TITLE>"
            ;;
          "approved")
            message="$author_mention님, 축하합니다! $reviewer_mention님이 PR을 승인했습니다: <$PR_URL|$PR_TITLE>"
            ;;
        esac
        
        if [ -n "$message" ]; then
          response=$(curl -s -o /dev/null -w "%{http_code}" -X POST -H 'Content-type: application/json' \
            --data "{\"text\":\"$message\"}" \
            "$SLACK_WEBHOOK_URL")
          
          if [ "$response" = "200" ]; then
            echo "Successfully sent Slack notification"
          else
            echo "Error: Failed to send Slack notification. HTTP status code: $response" >&2
            exit 1
          fi
        else
          echo "No notification to send"
        fi