def _date(value):
    return value.isoformat() if value else None


def serialize_reference_check(row, names=None) -> dict:
    """`names` is {user_id: name} from one batched Users.names_by_ids lookup in
    views, so the recruiter / candidate search dropdowns can preselect on edit."""
    names = names or {}
    return {
        "id": str(row.id) if row.id else None,
        "recruiter_id": str(row.recruiter_id) if row.recruiter_id else None,
        "recruiter_name": names.get(str(row.recruiter_id)) if row.recruiter_id else None,
        "candidate_id": str(row.candidate_id) if row.candidate_id else None,
        "candidate_name": names.get(str(row.candidate_id)) if row.candidate_id else None,
        "record_overview": {
            "position_applied": row.position_applied,
            "referee_name": row.referee_name,
            "date_time": _date(row.date_time),
            "referee_title": row.referee_title,
            "referee_organization": row.referee_organization,
            "relationship_duration": row.relationship_duration,
        },
        "professional_feedback": {
            "scope_of_relationship": row.scope_of_relationship,
            "work_approach": row.work_approach,
            "leadership": row.leadership,
            "communication": row.communication,
            "agility": row.agility,
        },
        "referee_signoff": {
            "referee_name": row.signoff_referee_name,
            "designation": row.signoff_designation,
            "signed_date": _date(row.signoff_date),
        },
        "created_by": str(row.created_by) if row.created_by else None,
        "created_by_name": names.get(str(row.created_by)) if row.created_by else None,
        "created_at": row.created_at.isoformat() if row.created_at else None,
        "updated_at": row.updated_at.isoformat() if row.updated_at else None,
    }