discussion_auto_close.yml

name: Auto-Close Very Short Discussions

on:
  discussion:
    types: [created]

permissions:
  issues: write
  discussions: write

jobs:
  validate-discussion:
    runs-on: ubuntu-latest
    steps:
      - name: Check word and character count
        id: validation
        run: |
          MIN_WORDS=5
          MIN_CHARS=10

          BODY=$(jq -r '.discussion.body' "$GITHUB_EVENT_PATH")
          WORD_COUNT=$(echo "$BODY" | wc -w)
          CHAR_COUNT=$(echo -n "$BODY" | wc -m)

          if [ "$WORD_COUNT" -lt $MIN_WORDS ] || [ "$CHAR_COUNT" -lt $MIN_CHARS ]; then
            echo "too_short=true" >> "$GITHUB_OUTPUT"
            echo "words=$WORD_COUNT" >> "$GITHUB_OUTPUT"
            echo "chars=$CHAR_COUNT" >> "$GITHUB_OUTPUT"
          else
            echo "too_short=false" >> "$GITHUB_OUTPUT"
          fi
          echo "$GITHUB_OUTPUT""

      - name: Notify User via GitHub Mention (Generates Email) then Delete Discussion
        if: steps.validation.outputs.too_short == 'true'
        uses: actions/github-script@v7
        env:
          WORDS: ${{ steps.validation.outputs.words }}
          CHARS: ${{ steps.validation.outputs.chars }}
        with:
          script: |
            const { discussion } = context.payload;
  
            await github.graphql(`
              mutation($discussionId: ID!, $body: String!) {
                addDiscussionComment(input: {
                  discussionId: $discussionId,
                  body: $body
                }) { comment { id } }
              }`,
              {
                discussionId: discussion.node_id,
                body: `⚠️ @${discussion.user.login}\nDiscussion closed: To protect against spam, discussion posts that do not meet a minimum word and character count are automatically deleted. Please provide more details in a new post.`
              }
            );
  
            await github.graphql(`
              mutation($discussionId: ID!) {
                deleteDiscussion(input: {id: $discussionId}) { discussion { id } }
              }`, { discussionId: discussion.node_id }
            );