unassign-stale-issues.yml

name: Unassign Issues with No PR After 7 Days

on:
  schedule:
    - cron: '0 2 * * *'  # Runs daily at 2 AM UTC
  workflow_dispatch:     # Manual trigger support

jobs:
  unassign-stale-issues:
    runs-on: ubuntu-latest
    steps:
      - name: Check for stale assigned issues
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.PAT }}
          script: |
            const daysBeforeUnassign = 7;
            const now = new Date();

            // Get all open issues with assignees
            const issues = await github.paginate(github.rest.issues.listForRepo, {
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'open',
              assignee: '*'
            });

            for (const issue of issues) {
              if (issue.pull_request) continue; // Skip PRs

              // Get timeline events to find assignment and PR link events
              const timeline = await github.paginate(github.rest.issues.listEventsForTimeline, {
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue.number,
                mediaType: { previews: ["mockingbird"] }
              });

              // Find the first assignment event date
              const assignedEvent = timeline.filter(e => e.event === 'assigned').at(-1);// latest
              if (!assignedEvent) {
                // No assignment event found, skip issue
                continue;
              }
              const assignedAt = new Date(assignedEvent.created_at);
              // Find the first PR linked event date
              const prLinkedEvent = timeline
                .filter(
                  e =>
                    ['connected', 'cross-referenced'].includes(e.event) &&
                    new Date(e.created_at) >= assignedAt
                )
                .at(0); // earliest link *after* assignment
              const prLinkedAt = prLinkedEvent ? new Date(prLinkedEvent.created_at) : null;

              // Calculate days since assignment
              const daysSinceAssignment = (now - assignedAt) / (1000 * 60 * 60 * 24);

              // Check if issue is still assigned (in case assignees changed later)
              const currentlyAssigned = issue.assignees.length > 0;

              if (currentlyAssigned && daysSinceAssignment >= daysBeforeUnassign) {
                // If PR not linked or linked after 7 days
                if (!prLinkedAt || prLinkedAt > new Date(assignedAt.getTime() + daysBeforeUnassign * 24 * 60 * 60 * 1000)) {
                  console.log(`Unassigning issue #${issue.number} - no PR linked within ${daysBeforeUnassign} days of assignment.`);

                  // Remove assignees
                  await github.rest.issues.removeAssignees({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: issue.number,
                    assignees: issue.assignees.map(user => user.login)
                  });

                  // Post comment
                  await github.rest.issues.createComment({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: issue.number,
                    body: `⏰ This issue was automatically unassigned because no pull request was linked within ${daysBeforeUnassign} days of assignment. Please request reassignment if you are still working on it.`
                  });
                }
              }
            }