class ReportQuery {
  const ReportQuery({
    this.search = '',
    this.topic,
    this.institutionId,
    this.hasAudio = false,
    this.sort = ReportSort.latest,
  });

  final String search;
  final String? topic;
  final String? institutionId;
  final bool hasAudio;
  final ReportSort sort;

  bool get hasActiveFilter =>
      search.trim().isNotEmpty ||
      topic != null ||
      institutionId != null ||
      hasAudio ||
      sort != ReportSort.latest;

  ReportQuery copyWith({
    String? search,
    Object? topic = _sentinel,
    Object? institutionId = _sentinel,
    bool? hasAudio,
    ReportSort? sort,
  }) {
    return ReportQuery(
      search: search ?? this.search,
      topic: identical(topic, _sentinel) ? this.topic : topic as String?,
      institutionId: identical(institutionId, _sentinel)
          ? this.institutionId
          : institutionId as String?,
      hasAudio: hasAudio ?? this.hasAudio,
      sort: sort ?? this.sort,
    );
  }
}

enum ReportSort { latest, oldest }

const Object _sentinel = Object();