comment.yaml

name: Reply to issue comments
on:
  issue_comment:
    types: [created]

permissions:
  issues: write

jobs:
  reply:
    runs-on: ubuntu-latest
    if: contains(github.event.comment.body, '@njzjz-bot')

    steps:
      - uses: actions/checkout@v6

      - name: Extract identifiers
        id: extract-identifiers
        env:
          COMMENT_BODY: ${{ github.event.comment.body }}
        shell: bash
        run: |
          identifiers="$(
            printf '%s\n' "$COMMENT_BODY" \
            | grep -oE '@njzjz-bot .*' \
            | head -n1 \
            | cut -c12- \
            | xargs
          )"
          printf 'identifiers=%s\n' "$identifiers" >> "$GITHUB_OUTPUT"

      - name: Run wenxian
        id: wenxian
        uses: ./
        with:
          id: ${{ steps.extract-identifiers.outputs.identifiers }}

      - name: Prepare the comment body
        id: prepare-comment
        env:
          COMMENT_USER: ${{ github.event.comment.user.login }}
          IDENTIFIERS: ${{ steps.extract-identifiers.outputs.identifiers }}
          OUTPUT_BIBTEX: ${{ steps.wenxian.outputs.bibtex }}
        shell: bash
        run: |
          {
            echo 'comment<<EOF'
            printf '@%s Here is the BibTeX entry for `%s`:\n' "$COMMENT_USER" "$IDENTIFIERS"
            echo '```bibtex'
            printf '%s\n' "$OUTPUT_BIBTEX"
            echo '```'
            echo 'EOF'
          } >> "$GITHUB_OUTPUT"

      - name: Post comment
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          OUTPUT_COMMENT: ${{ steps.prepare-comment.outputs.comment }}
          ISSUE_NUMBER: ${{ github.event.issue.number }}
        shell: bash
        run: |
          printf '%s\n' "$OUTPUT_COMMENT" | gh issue comment "$ISSUE_NUMBER" --body-file -