from ncircc.models.notification import Notification


def get_incident_notification_mapper() -> dict:
    """Return mapper with key: value incident_pk: notification_id."""
    all_notifications = Notification.objects.select_related('incident').all()
    mapper = {}
    for notification in all_notifications:
        if notification.incident.pk not in mapper:
            mapper[str(notification.incident.pk)] = notification.pk
    return mapper