第一次提交

Plugins/GIS/Source/GenericInventorySystem/Private/Exchange/GIS_CurrencyDefinition.cpp

@@ -0,0 +1,51 @@
+// Copyright 2025 https://yuewu.dev/en  All Rights Reserved.
+
+
+#include "Exchange/GIS_CurrencyDefinition.h"
+
+#include "GIS_InventorySubsystem.h"
+
+#include UE_INLINE_GENERATED_CPP_BY_NAME(GIS_CurrencyDefinition)
+
+FGIS_CurrencyExchangeRate::FGIS_CurrencyExchangeRate(const UGIS_CurrencyDefinition* InCurrency, float InExchangeRate)
+{
+	Currency = InCurrency;
+	ExchangeRate = InExchangeRate;
+}
+
+
+bool UGIS_CurrencyDefinition::TryGetExchangeRateTo(const UGIS_CurrencyDefinition* OtherCurrency, double& ExchangeRate) const
+{
+	if (OtherCurrency == nullptr)
+	{
+		ExchangeRate = -1;
+		return false;
+	}
+
+	//same currency
+	if (OtherCurrency == this)
+	{
+		ExchangeRate = 1;
+		return true;
+	}
+
+	const FGIS_CurrencyExchangeRate RootExchangeRate = GetRootExchangeRate();
+	const FGIS_CurrencyExchangeRate OtherRootExchangeRate = OtherCurrency->GetRootExchangeRate();
+	if (RootExchangeRate.Currency != OtherRootExchangeRate.Currency)
+	{
+		ExchangeRate = -1;
+		return false;
+	}
+
+	ExchangeRate = RootExchangeRate.ExchangeRate / OtherRootExchangeRate.ExchangeRate;
+	return true;
+}
+
+FGIS_CurrencyExchangeRate UGIS_CurrencyDefinition::GetRootExchangeRate(double AdditionalExchangeRate) const
+{
+	if (ParentCurrency)
+	{
+		return ParentCurrency->GetRootExchangeRate(AdditionalExchangeRate * ExchangeRateToParent);
+	}
+	return FGIS_CurrencyExchangeRate(this, AdditionalExchangeRate);
+}