changes to task scheduling and readability change on downloads view

backend/app/api/downloads.py

@@ -207,6 +207,41 @@ async def reset_orphaned_downloads():
         return jsonify({"error": str(e)}), 500
 
 
+@bp.route("/requeue-stale", methods=["POST"])
+async def requeue_stale_downloads():
+    """Re-queue Celery tasks for downloads stuck in 'queued' status.
+
+    Downloads can get stuck in 'queued' database status if the Celery task
+    was lost (e.g., sent to wrong Redis DB, Redis restart, etc.).
+    This endpoint re-sends the Celery tasks for those jobs.
+    """
+    from app.tasks.maintenance import requeue_stale_jobs, _requeue_all_queued_jobs_async
+
+    data = await request.get_json() or {}
+    threshold_minutes = data.get("threshold_minutes", 0)  # 0 = re-queue ALL queued jobs
+
+    try:
+        if threshold_minutes == 0:
+            # Re-queue all queued jobs immediately (synchronous for immediate feedback)
+            result = await _requeue_all_queued_jobs_async()
+            current_app.logger.info(f"Manual re-queue of all queued jobs: {result}")
+            return jsonify({
+                "message": f"Re-queued {result['requeued_count']} queued jobs",
+                "requeued_count": result['requeued_count'],
+            })
+        else:
+            # Queue the task for threshold-based re-queue
+            task = requeue_stale_jobs.delay(threshold_minutes)
+            return jsonify({
+                "message": "Stale job re-queue queued",
+                "task_id": task.id,
+                "threshold_minutes": threshold_minutes,
+            }), 202
+    except Exception as e:
+        current_app.logger.error(f"Failed to re-queue stale jobs: {e}")
+        return jsonify({"error": str(e)}), 500
+
+
 @bp.route("/stats", methods=["GET"])
 async def get_stats():
     """Get download statistics."""