Clothing system refactor

Source/NakedDesire/Items/ItemInstance.h

@@ -4,19 +4,55 @@
 #include "UObject/Object.h"
 #include "ItemInstance.generated.h"
 
+class UItemDefinition;
+struct FItemSaveRecord;
+struct FInstancedStruct;
+
+/**
+ * Base for per-instance mutable state carried inside FItemSaveRecord::State.
+ * Subclass per item type (see FClothingInstanceState, FSexToyInstanceState).
+ */
+USTRUCT()
+struct NAKEDDESIRE_API FItemInstanceState
+{
+	GENERATED_BODY()
+};
+
 UCLASS(Abstract)
 class NAKEDDESIRE_API UItemInstance : public UObject
 {
 	GENERATED_BODY()
-	
+
 public:
 	virtual void PostInitProperties() override;
 	virtual void PostDuplicate(EDuplicateMode::Type DuplicateMode) override;
 
 	FGuid GetInstanceId() const { return InstanceId; }
 	void SetInstanceId(FGuid InId);
-	
+
+	UItemDefinition* GetItemDefinition() const { return ItemDefinition; }
+	void SetItemDefinition(UItemDefinition* InDefinition) { ItemDefinition = InDefinition; }
+
+	/** Serialize identity + definition + per-type state into a record. */
+	FItemSaveRecord ToSaveRecord() const;
+
+	/**
+	 * Reconstruct the correct UItemInstance subclass from a saved record,
+	 * driven by the definition's GetInstanceClass(). Returns nullptr if the
+	 * definition fails to load.
+	 */
+	static UItemInstance* CreateFromRecord(UObject* Outer, const FItemSaveRecord& Record);
+
 protected:
+	/** Override to pack this type's mutable state into OutState. */
+	virtual void CaptureState(FInstancedStruct& OutState) const {}
+
+	/** Override to restore this type's mutable state from InState. */
+	virtual void ApplyState(const FInstancedStruct& InState) {}
+
 	UPROPERTY(VisibleAnywhere, SaveGame, BlueprintReadOnly, Category = "Item", meta = (AllowPrivateAccess = "true"))
 	FGuid InstanceId;
-};
+
+	UPROPERTY()
+	TObjectPtr<UItemDefinition> ItemDefinition;
+};