update-issue.yml

name: Update issue

on:
  issues:
    types: 
      - opened
      - reopened

jobs:
  update-issue:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Parsing issue
        id: issue-parser
        uses: stefanbuck/github-issue-parser@v3
        with:
          template-path: .github/ISSUE_TEMPLATE/challenge.yml
      - name: Adding milestone to issue
        uses: Julexar/Milestone-Assigner@v1.0
        with:
          token: "${{ secrets.ACTION_TOKEN }}"
          milestone: "${{ steps.issue-parser.outputs.issueparser_challenge-year }} Challenges"
      - name: Run bash script to extract day from issue title
        id: extract
        run: |
          string="${{ github.event.issue.title }}"
          if [[ $string =~ Day\ ([0-9]+) ]]; then
            day=${BASH_REMATCH[1]}
            echo "::set-output name=day::$day"
          else
            echo "::error::Title does not match the expected pattern"
          fi
      - name: Create comment
        uses: peter-evans/create-or-update-comment@v4
        with:
          issue-number: ${{ github.event.issue.number }}
          body: |
            ### Challenge link
            https://adventofcode.com/${{ steps.issue-parser.outputs.issueparser_challenge-year }}/day/${{ steps.extract.outputs.day }}