auto-weekly-issue.yml

name: Auto Create Weekly Issue

on:
  schedule:
    # 매주 월요일 오전 9시 (UTC 0시, 한국시간 9시)
    - cron: '0 0 * * 1'
  workflow_dispatch:  # 수동 실행도 가능

jobs:
  create-issue:
    runs-on: ubuntu-latest
    permissions:
      issues: write

    steps:
      - name: Calculate week number and dates
        id: calc
        run: |
          WEEK_NUM=$(date +%U)
          
          WEEK_NUM_FORMATTED=$(printf "%02d" $((10#$WEEK_NUM + 1)))

          START_DATE=$(date -d "monday" +%Y.%m.%d)
          END_DATE=$(date -d "monday + 6 days" +%Y.%m.%d)

          echo "week_number=$WEEK_NUM_FORMATTED" >> $GITHUB_OUTPUT
          echo "start_date=$START_DATE" >> $GITHUB_OUTPUT
          echo "end_date=$END_DATE" >> $GITHUB_OUTPUT

      - name: Check for duplicate issue
        id: check
        uses: actions/github-script@v7
        with:
          script: |
            const weekNumber = '${{ steps.calc.outputs.week_number }}';
            const startDate = '${{ steps.calc.outputs.start_date }}';
            const endDate = '${{ steps.calc.outputs.end_date }}';
            const expectedTitle = `[Week${weekNumber}] ${startDate} ~ ${endDate} 주차 문제`;

            // 열려있는 이슈 중에서 같은 제목이 있는지 확인
            const { data: issues } = await github.rest.issues.listForRepo({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'all',
              labels: 'weekly-challenge'
            });

            const duplicate = issues.find(issue => issue.title === expectedTitle);

            if (duplicate) {
              console.log(`⚠️ Issue already exists: ${duplicate.html_url}`);
              core.setOutput('should_create', 'false');
            } else {
              console.log(`✅ No duplicate found. Proceeding to create issue.`);
              core.setOutput('should_create', 'true');
            }

      - name: Create weekly issue
        if: steps.check.outputs.should_create == 'true'
        uses: actions/github-script@v7
        with:
          script: |
            const weekNumber = '${{ steps.calc.outputs.week_number }}';
            const startDate = '${{ steps.calc.outputs.start_date }}';
            const endDate = '${{ steps.calc.outputs.end_date }}';

            const issueBody = `## Week ${weekNumber} (${startDate} ~ ${endDate})

            이번 주 공통 문제입니다! 💪

            ### 📝 문제 목록

            #### 문제 1
            - **플랫폼**: 백준 / 프로그래머스 / 리트코드
            - **문제 번호**:
            - **문제 이름**:
            - **난이도**:
            - **링크**:

            #### 문제 2
            - **플랫폼**:
            - **문제 번호**:
            - **문제 이름**:
            - **난이도**:
            - **링크**:

            #### 문제 3
            - **플랫폼**:
            - **문제 번호**:
            - **문제 이름**:
            - **난이도**:
            - **링크**:

            ---

            ### ✅ 진행 상황

            - [ ] @sukangpunch
            - [ ] @Hexeong
            - [ ] @whqtker
            - [ ] @JAEHEE25
            - [ ] @Gyuhyeok99

            ---

            ### 💡 참고사항

            문제 풀이는 \`weekly/week${weekNumber}/\` 디렉토리에 업로드해주세요!

            \`\`\`bash
            weekly/week${weekNumber}/
            ├── BOJ_1234_문제명/
            │   ├── sukangpunch.py
            │   └── Hexeong.java
            └── PGS_5678_문제명/
                └── whqtker.cpp
            \`\`\`

            > ⚠️ **문제 정보를 채워주세요!** 이슈 생성 후 문제 정보를 편집해서 추가해주세요.
            `;

            await github.rest.issues.create({
              owner: context.repo.owner,
              repo: context.repo.repo,
              title: `[Week${weekNumber}] ${startDate} ~ ${endDate} 주차 문제`,
              body: issueBody,
              labels: ['weekly-challenge']
            });

            console.log(`✅ Week ${weekNumber} issue created!`);