RedirectionSummary.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#if WITH_EDITOR
 
#include "Containers/Array.h"
#include "Containers/ArrayView.h"
#include "Containers/Map.h"
#include "Containers/SortedMap.h"
#include "HAL/CriticalSection.h"
#include "Hash/Blake3.h"
#include "UObject/CoreRedirects.h"
#include "UObject/NameTypes.h"
 
class FRedirectionSummary
{
public:
    FRedirectionSummary() = default;
    FRedirectionSummary(FRedirectionSummary&& Other);
    FRedirectionSummary& operator=(FRedirectionSummary&& Other);
 
    void Add(const FCoreRedirect& CoreRedirect);
    void Remove(const FCoreRedirect& CoreRedirect);
 
    UE_DEPRECATED(5.6, "Use GetHashAffectingPackages instead.")
    void AppendHashAffectingPackages(FBlake3& Hasher, TConstArrayView<FName> PackageNames);
    
    void GetHashAffectingPackages(const TConstArrayView<FName>& PackageNames, TArray<FBlake3Hash>& HashArray);
    void AppendHashGlobal(FBlake3& Hasher);
 
private:
    struct FCompareRedirect
    {
        bool operator()(const FCoreRedirect& A, const FCoreRedirect& B);
    };
    struct FRedirectContainer
    {
    public:
        void Add(FCoreRedirect&& Redirect);
        void Remove(const FCoreRedirect& Redirect);
        bool IsEmpty() const;
        void Empty();
        bool TryAppendHashInReadLock(FBlake3& Hasher) const;
        void AppendHashInWriteLock(FBlake3& Hasher);
    private:
        void CalculateHash();
        void AppendHashWithoutDirtyCheck(FBlake3& Hasher) const;
    private:
        TSortedMap<FCoreRedirect, bool, FDefaultAllocator, FCompareRedirect> Redirects;
        FBlake3Hash Hash;
        bool bHashDirty = false;
    };
 
private:
    static TArray<FName, TInlineAllocator<2>> GetAffectedPackages(const FCoreRedirect& Redirect);
 
private:
    TMap<FName, FRedirectContainer> RedirectsForPackage;
    FRedirectContainer GlobalRedirects;
    FRWLock Lock;
};
 
#endif