text: """Custom context processors."""
  
  from functools import reduce
  
  from . import signals
  
  
  def top_notifications(request):
      """A context processor to include top notifications."""
      if request.user.is_anonymous:
          return {}
      interval = request.localconfig.parameters.get_value(
          "top_notifications_check_interval")
      notifications = signals.get_top_notifications.send(
          sender="top_notifications", include_all=False)
      notifications = reduce(
          lambda a, b: a + b, [notif[1] for notif in notifications])
      return {
          "notifications_check_interval": interval * 1000,
          "top_notifications": notifications
      }
  