PICK_REVIEWER.yml

name: "Pick Reviewer"

on:
  pull_request:
    types: opened

jobs:
  pick-random-reviewer:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Pick random reviewer
        id: pick_random_reviewer
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');

            const developers = JSON.parse(fs.readFileSync(`${{ github.workspace }}/.github/workflows/reviewer.json`));
            const prCreator = context.payload.pull_request.user.login;
            const prUrl = context.payload.pull_request.html_url;
            const prCreatorJson = developers.reviewers.find(person => person.githubName === prCreator);

            //PrCreator가 reviewer에 등록되지 않은 사람인 경우
            if (!prCreatorJson) {
              const reviewerArr = developers.reviewers;
              const randomReviewer1 = getRandomReviewer(reviewerArr);
              const randomReviewer2 = getRandomReviewer(reviewerArr.filter(reviewer => reviewer.name !== randomReviewer1.name));
              setOutput(prCreator, prUrl, randomReviewer1, randomReviewer2);
            } else {
              const candidateInternalReviewers = developers.reviewers.filter(person => person.team === prCreatorJson.team && person.githubName !== prCreator);
              const candidateExternalReviewers = developers.reviewers.filter(person => person.team !== prCreatorJson.team);
              const randomReviewer1 = getRandomReviewer(candidateInternalReviewers);
              const randomReviewer2 = getRandomReviewer(candidateExternalReviewers);
              setOutput(prCreatorJson.name, prUrl, randomReviewer1, randomReviewer2);
            }

            function getRandomReviewer(reviewers) {
              return reviewers[Math.floor(Math.random() * reviewers.length)];
            }

            function setOutput(prCreator, prUrl, reviewer1, reviewer2) {
              core.setOutput('writer', JSON.stringify(prCreator));
              core.setOutput('pullRequestLink', JSON.stringify(prUrl));
              core.setOutput('reviewer1Name', JSON.stringify(reviewer1.name));
              core.setOutput('reviewer2Name', JSON.stringify(reviewer2.name));
              core.setOutput('reviewer1GithubName', reviewer1.githubName);
              core.setOutput('reviewer2GithubName', reviewer2.githubName);
            }

      - name: Add Reviewers
        uses: madrapps/add-reviewers@v1
        with:
          reviewers: ${{ steps.pick_random_reviewer.outputs.reviewer1GithubName }},${{ steps.pick_random_reviewer.outputs.reviewer2GithubName }}
          token: ${{ secrets.GITHUB_TOKEN }}
      

      - name: Send Slack Trigger
        run: |
          curl -X POST https://api-slack.internal.bcsdlab.com/api/review-request/frontend \
          -H 'Content-Type: application/json' \
          -d '{
                "pullRequestLink": ${{ steps.pick_random_reviewer.outputs.pullRequestLink }},
                "writer": ${{ steps.pick_random_reviewer.outputs.writer }},
                "reviewers": [${{ steps.pick_random_reviewer.outputs.reviewer1Name }}, ${{ steps.pick_random_reviewer.outputs.reviewer2Name }}]
              }'