auto_assign_issue.yml

name: Auto Assign Issue

on:
  issue_comment:
    types: [created]

permissions:
  issues: write
  pull-requests: write
  contents: read

jobs:
  assign:
    # Ensure this only runs on actual Issues, not Pull Request comments
    if: ${{ !github.event.issue.pull_request }}
    runs-on: ubuntu-latest

    steps:
      - name: Assign commenter
        uses: actions/github-script@v7
        with:
          script: |
            const owner = context.repo.owner;
            const repo = context.repo.repo;
            const issue_number = context.payload.issue.number;
            const assignee = context.payload.comment.user.login;
            const comment_id = context.payload.comment.id;
            const body = (context.payload.comment.body || '').toLowerCase();

            const keywords = ['assign me', 'assign it to me', 'assign this to me', 'assign this issue to me'];
            const hasAssignKeyword = keywords.some(k => body.includes(k));

            if (!hasAssignKeyword) return;

            // 1. Check if already assigned
            const currentAssignees = context.payload.issue.assignees || [];
            if (currentAssignees.length > 0) {
              core.info('Already assigned.');
              return;
            }

            try {
              // 2. Attempt Assignment
              await github.rest.issues.addAssignees({
                owner,
                repo,
                issue_number,
                assignees: [assignee],
              });

              // 3. Verify if assignment actually stuck
              const { data: updatedIssue } = await github.rest.issues.get({
                owner, repo, issue_number
              });
              
              const isAssigned = updatedIssue.assignees.some(a => a.login === assignee);

              if (!isAssigned) {
                await github.rest.issues.createComment({
                  owner, repo, issue_number,
                  body: `⚠️ @${assignee}, I couldn't assign you. You must be a collaborator or a member of this organization to be assigned to issues.`
                });
                return;
              }

              // 4. Success Actions
              await github.rest.issues.createComment({
                owner, repo, issue_number,
                body: `🎉 Issue assigned to @${assignee}! Happy coding!`
              });
              
              await github.rest.reactions.createForIssueComment({
                owner, repo, comment_id, content: 'rocket'
              });

            } catch (error) {
              core.setFailed(`Workflow failed: ${error.message}`);
            }