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c0b7a8f643
A trade used the LOT and the count from the offer as the player sent it. The offer is now resolved when it arrives and again when the trade completes: the LOT comes from the held item, the count stops at the held count, and an offer that names an unknown item, the same item twice or a count of 0 is refused. The other player only receives an item that was taken from the offering player. Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
#pragma once
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#include "Entity.h"
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#include <functional>
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#include <map>
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#include <memory>
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#include <optional>
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#include <vector>
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struct TradeItem {
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LWOOBJID itemId;
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LOT itemLot;
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uint32_t itemCount;
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bool operator==(const TradeItem& other) const = default;
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};
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// What a player holds of an item they offered
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struct HeldTradeItem {
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LOT lot;
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uint32_t count;
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};
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class Trade {
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public:
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/**
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* Checks the items a player offered against the items they hold.
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* @param offered the items as the player sent them
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* @param findHeld gives the held item with an ID, or nothing if the player has no such item
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* @return the offer with every LOT taken from the held item and every count limited to the held count,
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* or nothing if the offer names an item the player does not hold, the same item twice or a count of 0
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*/
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static std::optional<std::vector<TradeItem>> ResolveOffer(
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const std::vector<TradeItem>& offered,
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const std::function<std::optional<HeldTradeItem>(LWOOBJID)>& findHeld);
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explicit Trade(LWOOBJID tradeId, LWOOBJID participantA, LWOOBJID participantB);
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~Trade();
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LWOOBJID GetTradeId() const;
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bool IsParticipant(LWOOBJID playerId) const;
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LWOOBJID GetParticipantA() const;
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LWOOBJID GetParticipantB() const;
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Entity* GetParticipantAEntity() const;
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Entity* GetParticipantBEntity() const;
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void SetCoins(LWOOBJID participant, uint64_t coins);
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void SetItems(LWOOBJID participant, std::vector<TradeItem> items);
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void SetAccepted(LWOOBJID participant, bool value);
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void Complete();
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void Cancel(const LWOOBJID canceller);
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void SendUpdateToOther(LWOOBJID participant);
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private:
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LWOOBJID m_TradeId = LWOOBJID_EMPTY;
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LWOOBJID m_ParticipantA = LWOOBJID_EMPTY;
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LWOOBJID m_ParticipantB = LWOOBJID_EMPTY;
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uint64_t m_CoinsA = 0;
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uint64_t m_CoinsB = 0;
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std::vector<TradeItem> m_ItemsA{};
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std::vector<TradeItem> m_ItemsB{};
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bool m_AcceptedA = false;
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bool m_AcceptedB = false;
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};
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class TradingManager {
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public:
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static TradingManager* Instance() {
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if (!m_Address) {
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m_Address = new TradingManager();
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}
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return m_Address;
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}
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const std::unique_ptr<Trade>& GetTrade(LWOOBJID tradeId) const;
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const std::unique_ptr<Trade>& GetPlayerTrade(LWOOBJID playerId) const;
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void CancelTrade(const LWOOBJID canceller, LWOOBJID tradeId, const bool sendCancelMessage = true);
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void NewTrade(LWOOBJID participantA, LWOOBJID participantB);
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private:
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static TradingManager* m_Address; //For singleton method
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std::unordered_map<LWOOBJID, std::unique_ptr<Trade>> trades;
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};
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