// Copyright Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "Serialization/ArchiveObjectGraph.h"

// This traces referenced/referencer of an object using FArchiveObjectGraph
class FTraceReferences
{
    FArchiveObjectGraph ArchiveObjectGraph;

    // internal recursive function for referencers/referenced
    void GetReferencerInternal(UObject* CurrentObject, TArray<FObjectGraphNode*>& OutReferencer, int32 CurrentDepth, int32 TargetDepth);
    void GetReferencedInternal(UObject* CurrentObject, TArray<FObjectGraphNode*>& OutReferenced, int32 CurrentDepth, int32 TargetDepth);

public:
    UE_DEPRECATED(4.23, "This class is out of date and misses many references, replace with FReferenceChainSearch or FFindReferencersArchive")
    FTraceReferences(bool bIncludeTransients = false, EObjectFlags KeepFlags = RF_AllFlags);

    // returns referencer string of an object
    FString GetReferencerString(UObject* Object, int32 Depth = 100);
    // returns referenced string of an object
    FString GetReferencedString(UObject* Object, int32 Depth = 100);

    // returns referencer object list of an object
    int32 GetReferencer(UObject* Object, TArray<FObjectGraphNode*>& Referencer, bool bExcludeSelf = true, int32 Depth = 100);
    // returns referenced object list of an object
    int32 GetReferenced(UObject* Object, TArray<FObjectGraphNode*>& Referenced, bool bExcludeSelf = true, int32 Depth = 100);
};