tested commit

hwanyoung2/Source/hwanyoung2/HYShopAOE.cpp

@@ -50,10 +50,10 @@ bool AHYShopAOE::RandomizeTradableItemSets(int CurrentHonbaekAmount)
 		return false;
 	}
 
-	// Filtering match the case.(ItemValue is less and equal than honbaek amount and over than 0)
+	// Filtering match the case.(Item can be bought, ItemValue is less and equal than honbaek amount and over than 0)
 	TArray<FInventoryItem*> FilteredItemData = ItemData.FilterByPredicate([CurrentHonbaekAmount](const FInventoryItem* ItemDataRow)
 	{
-		return ItemDataRow->ItemValue > 0 && ItemDataRow->ItemValue <= CurrentHonbaekAmount;
+		return !ItemDataRow->OnlyDropped && ItemDataRow->ItemValue > 0 && ItemDataRow->ItemValue <= CurrentHonbaekAmount;
 	});
 
 	int maxLoopNum = FMath::Min(5, FilteredItemData.Num());
@@ -82,7 +82,7 @@ TMap<FInventoryItem, int> AHYShopAOE::GetTradableItemSets(int CurrentHonbaekAmou
 	for (FInventoryItem TempItem : TempItems)
 	{
 		int MaxAmount = CurrentHonbaekAmount / TempItem.ItemValue;
-		int Amount = FMath::Clamp(FMath::RandRange(0, MaxAmount), 1, MaxAmount);
+		int Amount = FMath::Clamp(FMath::RandRange(0, MaxAmount), 1, 10);
 
 		Item.Add({ TempItem, Amount });
 	}

hwanyoung2/Source/hwanyoung2/HYShopNPCActor.cpp

@@ -2,6 +2,7 @@
 
 #include "HYShopNPCActor.h"
 #include "Blueprint/UserWidget.h"
+#include "HYPlayerCharacController.h"
 
 void AHYShopNPCActor::Interact_Implementation(APlayerController* Controller)
 {
@@ -17,4 +18,23 @@ void AHYShopNPCActor::Interact_Implementation(APlayerController* Controller)
 	//	ShopWidget = CreateWidget<UUserWidget>(Controller, ShopWidgetClass);
 	//	ShopWidget->AddToViewport();
 	//}
+}
+
+void AHYShopNPCActor::BuyTradableItem_Implementation(APlayerController* Controller, const FInventoryItem ItemToBuy, const int Amount)
+{
+	int CurrentAmount = *TradableItems.Find(ItemToBuy);
+
+	TradableItems[ItemToBuy] = CurrentAmount - Amount;
+
+	AHYPlayerCharacController* PlayerController = Cast<AHYPlayerCharacController>(Controller);
+
+	if (PlayerController)
+	{
+		for (int i = 0; i < Amount; ++i)
+		{
+			PlayerController->AddItemToInventoryByID(ItemToBuy.ItemID);
+		}
+	}
+
+	return;
 }

hwanyoung2/Source/hwanyoung2/HYShopNPCActor.h

@@ -15,8 +15,18 @@ class HWANYOUNG2_API AHYShopNPCActor : public AHYInteractableActor
 {
 	GENERATED_BODY()
 
+public:
 	virtual void Interact_Implementation(APlayerController* Controller);
 
+	// This Function will be called when player buy the item.
+	// @param Controller: Player Controller, ItemToBuy: the item structure(Data) to buy, Amount: the number of the item.
+	UFUNCTION(BlueprintNativeEvent)
+	void BuyTradableItem(APlayerController* Controller, const FInventoryItem ItemToBuy, const int Amount);
+
+	// This Function will be called when player buy the item.
+	// @param Controller: Player Controller, ItemToBuy: the item structure(Data) to buy, Amount: the number of the item.
+	virtual void BuyTradableItem_Implementation(APlayerController* Controller, const FInventoryItem ItemToBuy, const int Amount);
+
 public:
 	UPROPERTY(EditDefaultsOnly, BlueprintReadWrite)
 	TMap<FInventoryItem, int> TradableItems;