whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(int id, @JsonKey.new(name: 'commercial_id') int commercialId, String name, String description, List images, List tags, @JsonKey.new(name: 'isibook_space_id') int isibookSpaceId, @JsonKey.new(name: 'number_of_seats') int numberOfSeats, @JsonKey.new(name: 'number_of_reserved') int numberOfReserved, @JsonKey.new(name: 'hour_before_late') int hourBeforeLate, num price, @JsonKey.new(name: 'deleted_at') @TimestampConverter() Jiffy? deletedAt, @JsonKey.new(name: 'created_at') @TimestampConverter() Jiffy createdAt, @JsonKey.new(name: 'updated_at') @TimestampConverter() Jiffy updatedAt, List metadata, @JsonKey.new(name: 'order_column') int orderColumn, @JsonKey.new(name: 'can_pay_with_points') bool canPayWithPoints, @JsonKey.new(name: 'is_discount_active') bool isDiscountActive, @JsonKey.new(name: 'cancellation_policy') String cancellationPolicy, @JsonKey.new(name: 'date_start') @TimestampConverter() Jiffy dateStart, @JsonKey.new(name: 'date_end') @TimestampConverter() Jiffy dateEnd, @JsonKey.new(name: 'images_url') List imagesUrl,)?)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  TResult? Function(
          int id,
          @JsonKey(name: 'commercial_id') int commercialId,
          String name,
          String description,
          List<dynamic> images,
          List<dynamic> tags,
          @JsonKey(name: 'isibook_space_id') int isibookSpaceId,
          @JsonKey(name: 'number_of_seats') int numberOfSeats,
          @JsonKey(name: 'number_of_reserved') int numberOfReserved,
          @JsonKey(name: 'hour_before_late') int hourBeforeLate,
          num price,
          @JsonKey(name: 'deleted_at') @TimestampConverter() Jiffy? deletedAt,
          @JsonKey(name: 'created_at') @TimestampConverter() Jiffy createdAt,
          @JsonKey(name: 'updated_at') @TimestampConverter() Jiffy updatedAt,
          List<dynamic> metadata,
          @JsonKey(name: 'order_column') int orderColumn,
          @JsonKey(name: 'can_pay_with_points') bool canPayWithPoints,
          @JsonKey(name: 'is_discount_active') bool isDiscountActive,
          @JsonKey(name: 'cancellation_policy') String cancellationPolicy,
          @JsonKey(name: 'date_start') @TimestampConverter() Jiffy dateStart,
          @JsonKey(name: 'date_end') @TimestampConverter() Jiffy dateEnd,
          @JsonKey(name: 'images_url') List<dynamic> imagesUrl)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _IsibookActivity() when $default != null:
      return $default(
          _that.id,
          _that.commercialId,
          _that.name,
          _that.description,
          _that.images,
          _that.tags,
          _that.isibookSpaceId,
          _that.numberOfSeats,
          _that.numberOfReserved,
          _that.hourBeforeLate,
          _that.price,
          _that.deletedAt,
          _that.createdAt,
          _that.updatedAt,
          _that.metadata,
          _that.orderColumn,
          _that.canPayWithPoints,
          _that.isDiscountActive,
          _that.cancellationPolicy,
          _that.dateStart,
          _that.dateEnd,
          _that.imagesUrl);
    case _:
      return null;
  }
}