PackageUtils.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Misc/PackageName.h"
#include "Misc/Paths.h"
 
//Interchange namespace
namespace UE
{
    namespace Interchange
    {
        class FPackageUtils
        {
        public:
            static bool IsMapPackageAsset(const FString& ObjectPath)
            {
                FString MapFilePath;
                return FPackageUtils::IsMapPackageAsset(ObjectPath, MapFilePath);
            }
 
            static bool IsMapPackageAsset(const FString& ObjectPath, FString& MapFilePath)
            {
                const FString PackageName = FPackageUtils::ExtractPackageName(ObjectPath);
                if (PackageName.Len() > 0)
                {
                    FString PackagePath;
                    if (FPackageName::DoesPackageExist(PackageName, &PackagePath))
                    {
                        const FString FileExtension = FPaths::GetExtension(PackagePath, true);
                        if (FileExtension == FPackageName::GetMapPackageExtension())
                        {
                            MapFilePath = PackagePath;
                            return true;
                        }
                    }
                }
 
                return false;
            }
 
            static FString ExtractPackageName(const FString& ObjectPath)
            {
                // To find the package name in an object path we need to find the path left of the FIRST delimiter.
                // Assets like BSPs, lightmaps etc. can have multiple '.' delimiters.
                const int32 PackageDelimiterPos = ObjectPath.Find(TEXT("."), ESearchCase::CaseSensitive, ESearchDir::FromStart);
                if (PackageDelimiterPos != INDEX_NONE)
                {
                    return ObjectPath.Left(PackageDelimiterPos);
                }
 
                return ObjectPath;
            }
        };
    } //ns Interchange
} //ns UE