slack-notify.yml

name: Notify Slack on PR and Comment

on:
  pull_request:
    types: [opened, reopened, synchronize, review_requested]
  issue_comment:
    types: [created]
  pull_request_review:
    types: [submitted]

jobs:
  notify:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Determine event type
        id: determine_event
        run: echo "event_type=${{ github.event_name }}" >> $GITHUB_ENV

      - name: Read user mapping
        id: read_mapping
        run: |
          mapping=$(cat .github/user-mapping.json)
          echo "mapping=$mapping" >> $GITHUB_ENV

      - name: Cache Slack message timestamp
        if: ${{ env.event_type == 'pull_request' }}
        uses: actions/cache@v2
        with:
          path: slack_ts.txt
          key: slack-ts-${{ github.event.pull_request.number }}

      - name: Send notification for PR
        if: ${{ env.event_type == 'pull_request' && (github.event.action == 'opened' || github.event.action == 'reopened' || github.event.action == 'synchronize') }}
        id: slack_pr
        run: |
          response=$(curl -X POST -H 'Content-type: application/json' --data '{
            "text": "🧞‍♂️ PR 드리는 지니가 왔습니다\n[sambad#${{ github.event.pull_request.number }}] [${{ github.event.pull_request.title }}](${{ github.event.pull_request.html_url }})\n${{ github.event.pull_request.user.login }}님이 생성했어요."
          }' ${{ secrets.SLACK_BOT_ACCESS_TOKEN }})
          echo "slack_ts=$(echo $response | jq -r '.ts')" >> $GITHUB_ENV
          echo $slack_ts > slack_ts.txt
        env:
          SLACK_BOT_ACCESS_TOKEN: ${{ secrets.SLACK_BOT_ACCESS_TOKEN }}

      - name: Send notification for review request
        if: ${{ env.event_type == 'pull_request' && github.event.action == 'review_requested' }}
        run: |
          reviewer=${{ github.event.requested_reviewer.login }}
          slack_username=$(echo ${{ env.mapping }} | jq -r --arg reviewer "$reviewer" '.[$reviewer]')
          if [ "$slack_username" != "null" ]; then
            response=$(curl -X POST -H 'Content-type: application/json' --data '{
              "text": "🔔 리뷰 요청이 도착했습니다: @'$slack_username'"
            }' ${{ secrets.SLACK_BOT_ACCESS_TOKEN }})
            echo "slack_ts=$(echo $response | jq -r '.ts')" >> $GITHUB_ENV
            echo $slack_ts > slack_ts.txt
          else
            echo "Reviewer not found in mapping: $reviewer"
          fi
        env:
          SLACK_BOT_ACCESS_TOKEN: ${{ secrets.SLACK_BOT_ACCESS_TOKEN }}

      - name: Restore Slack message timestamp
        if: ${{ env.event_type == 'issue_comment' || env.event_type == 'pull_request_review' }}
        id: restore_ts
        uses: actions/cache@v2
        with:
          path: slack_ts.txt
          key: slack-ts-${{ github.event.issue.number || github.event.pull_request.number }}
          restore-keys: |
            slack-ts-

      - name: Load Slack message timestamp
        if: ${{ (env.event_type == 'issue_comment' || env.event_type == 'pull_request_review') && steps.restore_ts.outputs.cache-hit == 'true' }}
        run: echo "SLACK_MESSAGE_TS=$(cat slack_ts.txt)" >> $GITHUB_ENV

      - name: Send notification for comment
        if: ${{ env.event_type == 'issue_comment' && env.SLACK_MESSAGE_TS != '' }}
        run: |
          commenter=${{ github.event.comment.user.login }}
          slack_username=$(echo ${{ env.mapping }} | jq -r --arg commenter "$commenter" '.[$commenter]')
          if [ "$slack_username" != "null" ]; then
            curl -X POST -H 'Content-type: application/json' --data '{
              "text": "@'$slack_username'님이 코멘트를 달았습니다:\n${{ github.event.comment.body }}",
              "thread_ts": "${{ env.SLACK_MESSAGE_TS }}"
            }' ${{ secrets.SLACK_BOT_ACCESS_TOKEN }}
          else
            echo "Commenter not found in mapping: $commenter"
          fi
        env:
          SLACK_BOT_ACCESS_TOKEN: ${{ secrets.SLACK_BOT_ACCESS_TOKEN }}

      - name: Send notification for approval
        if: ${{ env.event_type == 'pull_request_review' && github.event.review.state == 'approved' && env.SLACK_MESSAGE_TS != '' }}
        run: |
          reviewer=${{ github.event.review.user.login }}
          slack_username=$(echo ${{ env.mapping }} | jq -r --arg reviewer "$reviewer" '.[$reviewer]')
          if [ "$slack_username" != "null" ]; then
            curl -X POST -H 'Content-type: application/json' --data '{
              "text": "✅ @'$slack_username'님이 승인하셨어요 🎉",
              "thread_ts": "${{ env.SLACK_MESSAGE_TS }}"
            }' ${{ secrets.SLACK_BOT_ACCESS_TOKEN }}
          else
            echo "Reviewer not found in mapping: $reviewer"
          fi
        env:
          SLACK_BOT_ACCESS_TOKEN: ${{ secrets.SLACK_BOT_ACCESS_TOKEN }}