Add item use command

Source/AgrarianGame/AgrarianGamePlayerController.cpp

@@ -20,6 +20,39 @@
 namespace
 {
 	const FVector GroundZeroDeveloperTravelHomeLocation(-22000.0f, -3500.0f, 1148.0f);
+
+	bool ApplyAgrarianItemUseEffect(const FName ItemId, const int32 Quantity, UAgrarianSurvivalComponent* SurvivalComponent, FString& OutEffectSummary)
+	{
+		if (!SurvivalComponent || Quantity <= 0)
+		{
+			return false;
+		}
+
+		if (ItemId == TEXT("food"))
+		{
+			SurvivalComponent->AddFood(15.0f * Quantity);
+			OutEffectSummary = FString::Printf(TEXT("restored %.0f hunger"), 15.0f * Quantity);
+			return true;
+		}
+
+		if (ItemId == TEXT("meat"))
+		{
+			SurvivalComponent->AddFood(22.0f * Quantity);
+			SurvivalComponent->AddSickness(3.0f * Quantity);
+			OutEffectSummary = FString::Printf(TEXT("restored %.0f hunger but added raw-meat sickness risk"), 22.0f * Quantity);
+			return true;
+		}
+
+		if (ItemId == TEXT("bandage"))
+		{
+			SurvivalComponent->ReduceInjury(18.0f * Quantity);
+			SurvivalComponent->RestoreHealth(4.0f * Quantity);
+			OutEffectSummary = FString::Printf(TEXT("treated %.0f injury severity"), 18.0f * Quantity);
+			return true;
+		}
+
+		return false;
+	}
 }
 
 void AAgrarianGamePlayerController::BeginPlay()
@@ -150,6 +183,17 @@ void AAgrarianGamePlayerController::AgrarianSplitStack(int32 StackIndex, int32 S
 	ServerAgrarianSplitStack(StackIndex, SplitQuantity);
 }
 
+void AAgrarianGamePlayerController::AgrarianUseItem(FName ItemId, int32 Quantity)
+{
+	if (ItemId == NAME_None || Quantity <= 0)
+	{
+		ClientMessage(TEXT("Usage: AgrarianUseItem <ItemId> <Quantity>"));
+		return;
+	}
+
+	ServerAgrarianUseItem(ItemId, Quantity);
+}
+
 void AAgrarianGamePlayerController::AgrarianTravel(float X, float Y, float Z)
 {
 	ServerAgrarianTravel(FVector(X, Y, Z));
@@ -299,6 +343,35 @@ void AAgrarianGamePlayerController::ServerAgrarianSplitStack_Implementation(int3
 	}
 }
 
+void AAgrarianGamePlayerController::ServerAgrarianUseItem_Implementation(FName ItemId, int32 Quantity)
+{
+	AAgrarianGameCharacter* AgrarianCharacter = GetPawn<AAgrarianGameCharacter>();
+	UAgrarianInventoryComponent* InventoryComponent = AgrarianCharacter ? AgrarianCharacter->GetInventoryComponent() : nullptr;
+	UAgrarianSurvivalComponent* SurvivalComponent = AgrarianCharacter ? AgrarianCharacter->GetSurvivalComponent() : nullptr;
+	if (!InventoryComponent || !SurvivalComponent)
+	{
+		ClientMessage(TEXT("No Agrarian inventory or survival component found."));
+		return;
+	}
+
+	FAgrarianItemStack UsedStack;
+	if (!InventoryComponent->ExtractItem(ItemId, Quantity, UsedStack))
+	{
+		ClientMessage(FString::Printf(TEXT("Could not use %d x %s."), Quantity, *ItemId.ToString()));
+		return;
+	}
+
+	FString EffectSummary;
+	if (!ApplyAgrarianItemUseEffect(ItemId, UsedStack.Quantity, SurvivalComponent, EffectSummary))
+	{
+		InventoryComponent->AddItem(UsedStack);
+		ClientMessage(FString::Printf(TEXT("%s cannot be used yet; item restored."), *ItemId.ToString()));
+		return;
+	}
+
+	ClientMessage(FString::Printf(TEXT("Used %d x %s: %s."), UsedStack.Quantity, *ItemId.ToString(), *EffectSummary));
+}
+
 void AAgrarianGamePlayerController::ServerAgrarianTravel_Implementation(FVector Destination)
 {
 	APawn* ControlledPawn = GetPawn();

Source/AgrarianGame/AgrarianGamePlayerController.h

@@ -72,6 +72,9 @@ public:
 	UFUNCTION(Exec)
 	void AgrarianSplitStack(int32 StackIndex, int32 SplitQuantity);
 
+	UFUNCTION(Exec)
+	void AgrarianUseItem(FName ItemId, int32 Quantity);
+
 	UFUNCTION(Exec)
 	void AgrarianTravel(float X, float Y, float Z);
 
@@ -97,6 +100,9 @@ protected:
 	UFUNCTION(Server, Reliable)
 	void ServerAgrarianSplitStack(int32 StackIndex, int32 SplitQuantity);
 
+	UFUNCTION(Server, Reliable)
+	void ServerAgrarianUseItem(FName ItemId, int32 Quantity);
+
 	UFUNCTION(Server, Reliable)
 	void ServerAgrarianTravel(FVector Destination);
 };

Source/AgrarianGame/AgrarianSurvivalComponent.cpp

@@ -179,6 +179,16 @@ void UAgrarianSurvivalComponent::AddInjury(float Severity)
 	}
 }
 
+void UAgrarianSurvivalComponent::ReduceInjury(float Amount)
+{
+	if (GetOwner() && GetOwner()->HasAuthority())
+	{
+		Survival.InjurySeverity -= FMath::Max(0.0f, Amount);
+		ClampSurvival();
+		BroadcastSurvivalChanged();
+	}
+}
+
 void UAgrarianSurvivalComponent::AddSickness(float Severity)
 {
 	if (GetOwner() && GetOwner()->HasAuthority())

Source/AgrarianGame/AgrarianSurvivalComponent.h

@@ -93,6 +93,9 @@ public:
 	UFUNCTION(BlueprintCallable, Category = "Agrarian|Survival")
 	void AddInjury(float Severity);
 
+	UFUNCTION(BlueprintCallable, Category = "Agrarian|Survival")
+	void ReduceInjury(float Amount);
+
 	UFUNCTION(BlueprintCallable, Category = "Agrarian|Survival")
 	void AddSickness(float Severity);