class TabItemPurchase {
  final String id;
  final String tabItemId;
  final DateTime purchasedAt;
  final DateTime? removedAt;

  /// The order it was rung up in; null for drinks from before orders.
  final String? orderId;

  const TabItemPurchase({
    required this.id,
    required this.tabItemId,
    required this.purchasedAt,
    this.removedAt,
    this.orderId,
  });

  bool get isRemoved => removedAt != null;

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is TabItemPurchase &&
          id == other.id &&
          tabItemId == other.tabItemId &&
          purchasedAt == other.purchasedAt &&
          removedAt == other.removedAt &&
          orderId == other.orderId;

  @override
  int get hashCode =>
      Object.hash(id, tabItemId, purchasedAt, removedAt, orderId);
}