[UE5.3.2][VisualStudio][Cpp]UnrealEngineのCPPプラグインからOpenAI(ChatGPT4o)を呼んで返り値jsonからパースしてPython部分を抜き出して実行！！できた！！！

#pragma once

#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "HttpModule.h"
#include "Interfaces/IHttpRequest.h"
#include "Interfaces/IHttpResponse.h"
#include "furcraeaUEOpenAIBPLibrary.generated.h"

UCLASS()
class UfurcraeaUEOpenAIBPLibrary : public UBlueprintFunctionLibrary
{
    GENERATED_BODY()

public:
    UfurcraeaUEOpenAIBPLibrary(const FObjectInitializer& ObjectInitializer);

    UFUNCTION(BlueprintCallable, Category = "furcraeaUEOpenAI")
    static FString furcraeaUEOpenAISampleFunction(FString Param);

private:
    static FString SendChatCompletionRequest(FString UserMessage);
    static void OnResponseReceived(FHttpRequestPtr Request, FHttpResponsePtr Response, bool bWasSuccessful);

    static void ResponseMessageToPythonCode(FString ResponseMessage);

    static bool RunMyPython(int32& ProcessId,
        FString FullPathOfProgramToRun, TArray<FString> CommandlineArgs, bool Hidden);
};

#include "furcraeaUEOpenAIBPLibrary.h"
#include "HttpModule.h"
#include "Interfaces/IHttpRequest.h"
#include "Interfaces/IHttpResponse.h"
#include "Json.h"
#include "JsonUtilities.h"
#include "String.h"
#include "Misc/FileHelper.h"
#include "Misc/Paths.h"
#include "Engine/Engine.h"
#include "PythonBridge.h"


//IMPLEMENT_GAME_MODULE(FDefaultGameModuleImpl, furcraeaUEOpenAIBPLibrary);

UfurcraeaUEOpenAIBPLibrary::UfurcraeaUEOpenAIBPLibrary(const FObjectInitializer& ObjectInitializer)
    : Super(ObjectInitializer)
{
    UE_LOG(LogTemp, Warning, TEXT("Hello World! UfurcraeaUEOpenAIBPLibrary ObjectInitializer"));
}

FString UfurcraeaUEOpenAIBPLibrary::furcraeaUEOpenAISampleFunction(FString Param)
{
    FString UserMessage = Param;
    FString ResponseMessage = TEXT("");
    UE_LOG(LogTemp, Warning, TEXT("Hello World! furcraeaUEOpenAISampleFunction"));
    
	ResponseMessage= SendChatCompletionRequest(UserMessage);
    return ResponseMessage;
}

FString UfurcraeaUEOpenAIBPLibrary::SendChatCompletionRequest(FString UserMessage)
{
    FString ApiKey = TEXT("sk-から始まるキー");

    if (!FModuleManager::Get().IsModuleLoaded("Http"))
    {
        FModuleManager::Get().LoadModule("Http");
    }

    FHttpModule* Http = &FHttpModule::Get();
    if (!Http)
    {
        UE_LOG(LogTemp, Error, TEXT("Failed to get FHttpModule instance"));
        return FString();
    }

    TSharedRef<IHttpRequest, ESPMode::ThreadSafe> HttpRequest = Http->CreateRequest();
    HttpRequest->SetURL("https://api.openai.com/v1/chat/completions");
    HttpRequest->SetVerb("POST");
    HttpRequest->SetHeader("Content-Type", "application/json");
    HttpRequest->SetHeader("Authorization", "Bearer " + ApiKey);

    FString Content = FString::Printf(TEXT(R"(
    {
        "model": "gpt-4o-mini",
        "messages": [{"role": "user", "content": "%s"}],
        "temperature": 0.7
    }
    )"), *UserMessage);

    HttpRequest->SetContentAsString(Content);

    //HttpRequest->OnProcessRequestComplete().BindUObject(this, &UfurcraeaUEOpenAIBPLibrary::OnResponseReceived);
    HttpRequest->OnProcessRequestComplete().BindLambda([](FHttpRequestPtr Request, FHttpResponsePtr Response, bool bWasSuccessful)
        {
            OnResponseReceived(Request, Response, bWasSuccessful);
        });
    HttpRequest->ProcessRequest();

    return FString();
}

void UfurcraeaUEOpenAIBPLibrary::OnResponseReceived(FHttpRequestPtr Request, FHttpResponsePtr Response, bool bWasSuccessful)
{
    if (bWasSuccessful && Response.IsValid())
    {
        FString ResponseContent = Response->GetContentAsString();
        TSharedPtr<FJsonObject> JsonObject;
        TSharedRef<TJsonReader<>> Reader = TJsonReaderFactory<>::Create(ResponseContent);

        if (FJsonSerializer::Deserialize(Reader, JsonObject) && JsonObject.IsValid())
        {
            FString MessageContent = JsonObject->GetArrayField("choices")[0]->AsObject()->GetObjectField("message")->GetStringField("content");
            UE_LOG(LogTemp, Warning, TEXT("OnResponseReceived() Response Message: %s"), *MessageContent);
            ResponseMessageToPythonCode(MessageContent);
        }
        else
        {
            UE_LOG(LogTemp, Error, TEXT("Failed to parse JSON response"));
        }
    }
    else
    {
        UE_LOG(LogTemp, Error, TEXT("Request failed"));
    }
}


static std::string replaceOtherStr(std::string& replacedStr, std::string from, std::string to) {
    const unsigned int pos = replacedStr.find(from);
    const int len = from.length();

    if (pos == std::string::npos || from.empty()) {
        return replacedStr;
    }

    return replacedStr.replace(pos, len, to);
}


void UfurcraeaUEOpenAIBPLibrary::ResponseMessageToPythonCode(FString ResponseMessage)
{
    //ResponseMessage の文字列から「```python」で始まり「```」で終わるまでの文字列を抜き出して
    


        // FString から標準文字列に変換
        FString aFString= ResponseMessage;
        std::string aString = TCHAR_TO_ANSI(*aFString);
        long aStartIndex = aString.find("```python");
        
        long aEndIndex = aString.rfind("```");

		long aLength = aEndIndex - aStartIndex;
        std::string aPythonCode =aString.substr(aStartIndex+9, aLength-9);

        replaceOtherStr(aPythonCode, "?", "//");
		// 標準文字列から FString に変換
		FString PythonCode = FString(aPythonCode.c_str());
        

        UE_LOG(LogTemp, Warning, TEXT("ResponseMessageToPythonCode() StartIndex: %u"), aStartIndex);
        UE_LOG(LogTemp, Warning, TEXT("ResponseMessageToPythonCode() EndIndex: %u"), aEndIndex);

        if (aStartIndex != 0 && aEndIndex != 0)
        {
            


            //FString PythonCode2 = ResponseMessage.Mid(StartIndex + 1, PythonCodeLength);
            UE_LOG(LogTemp, Warning, TEXT("ResponseMessageToPythonCode() 1 PythonCode: %s"), *PythonCode);
            //UE_LOG(LogTemp, Warning, TEXT("ResponseMessageToPythonCode() 2 PythonCode2: %s"), *PythonCode2);
            
             // Define the file path in the Saved directory
            FString FilePath = FPaths::ProjectSavedDir() / TEXT("ExtractedPythonCode.py");

            // Save the Python code to the file
            if (FFileHelper::SaveStringToFile(PythonCode, *FilePath))
            {
                UE_LOG(LogTemp, Warning, TEXT("Python code saved to: %s"), *FilePath);

                // Ensure the file path is correctly formatted for the exec command
                FString RelativeFilePath = FPaths::ConvertRelativePathToFull(FilePath);
                FString Command = FString::Printf(TEXT("py \"%s\""), *RelativeFilePath);
                //FString Command = FString::Printf(TEXT("\"%s\""), *RelativeFilePath);
				//GEngine->Exec(nullptr, *Command);

                UPythonBridge* bridge = UPythonBridge::Get();
                bridge->FunctionImplementedInPython();
                bridge->ExecuteCommand(RelativeFilePath);
            }
            else
            {
                UE_LOG(LogTemp, Error, TEXT("Failed to save Python code to file"));
            }


        }
        else 
        {
            UE_LOG(LogTemp, Warning, TEXT("ResponseMessageToPythonCode() PythonCode: in None"));
        }

    
}

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Engine.h"
#include "UObject/NoExportTypes.h"
#include "PythonBridge.generated.h"

/**
 * 
 */
UCLASS(Blueprintable)
class FURCRAEAUEOPENAI_API UPythonBridge : public UObject
{
	GENERATED_BODY()

public:
    UFUNCTION(BlueprintCallable, Category = Python)
    static UPythonBridge* Get();

    UFUNCTION(BlueprintImplementableEvent, Category = Python)
    void FunctionImplementedInPython() const;

    UFUNCTION(BlueprintImplementableEvent, Category = Python)
    void ExecuteCommand(const FString& CommandName) const;
};

// Fill out your copyright notice in the Description page of Project Settings.


#include "PythonBridge.h"

UPythonBridge* UPythonBridge::Get()
{
    TArray<UClass*> PythonBridgeClasses;
    GetDerivedClasses(UPythonBridge::StaticClass(), PythonBridgeClasses);
    int32 NumClasses = PythonBridgeClasses.Num();
    if (NumClasses > 0)
    {
        return Cast<UPythonBridge>(PythonBridgeClasses[NumClasses - 1]->GetDefaultObject());
    }
	return nullptr;
}
/*
void UPythonBridge::FunctionImplementedInPython() const
{
    UE_LOG(LogTemp, Warning, TEXT("Hello World! FunctionImplementedInPython"));
}

void UPythonBridge::ExecuteCommand(const FString& CommandName) const
{
    UE_LOG(LogTemp, Warning, TEXT("Hello World! ExecuteCommand"));
}
*/

import unreal
@unreal.uclass()
class PythonBridgeImplementation(unreal.PythonBridge):
    @unreal.ufunction(override=True)
    def function_implemented_in_python(self):
        print("function_implemented_in_python")
    @unreal.ufunction(override=True)
    def execute_command(self, command_name):
        print("execute_command  command_name="+command_name)
        exec(open(command_name).read())

https://dev.epicgames.com/documentation/en-us/unreal-engine/python-api/?application_version=5.3に乗ってるpythonでpep8に準拠してunrealengine5.3のpythonでレベルにcubeを10個並べて

import unreal

def spawn_cubes(num_cubes=10, spacing=200.0):
    # //??????????
    actor_spawned = []
    world = unreal.EditorLevelLibrary.get_editor_world()

    # ??????????????????
    cube_mesh = unreal.EditorAssetLibrary.load_asset('/Engine/BasicShapes/Cube')

    for i in range(num_cubes):
        # ??????????????
        spawn_location = unreal.Vector(i * spacing, 0, 0)

        # ?????????
        cube_actor = unreal.EditorLevelLibrary.spawn_actor_from_object(cube_mesh, spawn_location)
        actor_spawned.append(cube_actor)

    return actor_spawned

# ?????10????
spawned_cubes = spawn_cubes()