LevelInstancePropertyOverrideDesc.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#if WITH_EDITOR
 
#include "WorldPartition/WorldPartitionActorDesc.h"
#include "LevelInstance/LevelInstancePropertyOverrideAsset.h"
 
struct FAssetData;
 
// Shared so that existing containers can keep it alive even if owning LevelInstance might have released it
class FLevelInstancePropertyOverrideDesc : public TSharedFromThis<FLevelInstancePropertyOverrideDesc>
{
    friend class FLevelInstanceActorDesc;
    friend class ULevelInstancePropertyOverrideAsset;
    friend class ULevelInstancePropertyOverrideContainer;
    friend class ULevelInstanceContainerInstance;
public:
    virtual ~FLevelInstancePropertyOverrideDesc();
        
protected:
    FName GetWorldPackage() const { return WorldAsset.GetLongPackageFName(); }
    FSoftObjectPath GetAssetPath() const { return AssetPath; }
    FName GetAssetPackage() const { return PackageName; }
 
    void Init(const ULevelInstancePropertyOverrideAsset* InPropertyOverride);
    friend FArchive& operator<<(FArchive& Ar, FLevelInstancePropertyOverrideDesc& InPropertyOverrideDesc);
    void TransferNonEditedContainers(const FLevelInstancePropertyOverrideDesc* InExistingOverrideDesc);
 
    // Returns the overriden ActorDesc for an Actor part of BaseContainer or any of its Child containers
    FWorldPartitionActorDesc* GetOverrideActorDesc(const FGuid& InActorGuid, const FActorContainerPath& InContainerPath);
    const FWorldPartitionActorDesc* GetOverrideActorDesc(const FGuid& InActorGuid, const FActorContainerPath& InContainerPath) const;
 
    void SetContainerForActorDescs(UActorDescContainer* InContainer);
 
    const TMap<FActorContainerPath, TMap<FGuid, TSharedPtr<FWorldPartitionActorDesc>>>& GetActorDescsPerContainer() const { return ActorDescsPerContainer; }
    
    void SerializeTo(TArray<uint8>& OutPayload);
    void SerializeFrom(const TArray<uint8>& InPayload);
 
    // Utility methods to find Base ActorDescs
    const FWorldPartitionActorDesc* GetBaseDescByGuid(const FActorContainerPath& InContainerPath, const FGuid& InActorGuid) const;
    const UActorDescContainer* GetBaseContainer(const UActorDescContainer* InContainer, const FActorContainerPath& InContainerPath) const;
 
    FString GetContainerName() const;
    static FString GetContainerNameFromAssetPath(const FSoftObjectPath& InAssetPath);
    static FString GetContainerNameFromAsset(ULevelInstancePropertyOverrideAsset* InAsset);
 
    UActorDescContainer* GetBaseContainer() const { return BaseContainer; }
private:
    FSoftObjectPath AssetPath;
    FSoftObjectPath WorldAsset;
    FName PackageName;
        
    UActorDescContainer* BaseContainer = nullptr;
 
    // Override ActorDescs are stored as shared pointers because we have FLevelInstanceActorDesc::Init which can be called multiple times for an actor (Every time CreateActorDesc is called)
    // This will result in the new FLevelInstanceActorDesc copying some ActorDescs from the previous FLevelInstanceActorDesc (the one still in the parent Container)
    // For this operation to not trash the previous FLevelInstanceActorDesc we need to share those ptrs
    TMap<FActorContainerPath, TMap<FGuid, TSharedPtr<FWorldPartitionActorDesc>>> ActorDescsPerContainer;
};
 
#endif