UDelayTaskManager.h

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// Copyright (c) 2025 Doppleddiggong. All rights reserved. Unauthorized copying, modification, or distribution of this file, via any medium is strictly prohibited. Proprietary and confidential.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Macro.h"
#include "Subsystems/GameInstanceSubsystem.h"
#include "Delegates/Delegate.h"
#include "UDelayTaskManager.generated.h"
 
USTRUCT(BlueprintType)
struct FDelayHandle
{
    GENERATED_BODY()
 
    uint64 SeqIndex = 0;
 
    bool IsValid() const
    {
        return SeqIndex != 0;
    }
};
 
DECLARE_DYNAMIC_DELEGATE(FDelayCallback);
 
UCLASS()
class LATTELIBRARY_API UDelayTaskManager : public UGameInstanceSubsystem
{
    GENERATED_BODY()
 
public:
    DEFINE_SUBSYSTEM_GETTER_INLINE(UDelayTaskManager);
 
    virtual void Initialize(FSubsystemCollectionBase& Collection) override;
    virtual void Deinitialize() override;
 
    UFUNCTION(BlueprintCallable, Category="Sequence")
    FDelayHandle DelayCallBack(UObject* Owner, float Seconds, FDelayCallback Callback);
 
    // C++용 람다/함수버전
    FDelayHandle Delay(UObject* Owner, float Seconds, TFunction<void()> Action);
    // 다음 틱에 실행
    FDelayHandle NextTick(UObject* Owner, TFunction<void()> Action);
 
    UFUNCTION(BlueprintCallable, Category="Sequence")
    bool Cancel(const FDelayHandle& Handle);
 
    UFUNCTION(BlueprintCallable, Category="Sequence")
    void CancelAll(UObject* Owner);
 
private:
    // 타이머 만료 시 ID 기반 실행(핸들 전달 금지)
    UFUNCTION()
    void ExecuteById(uint64 SeqIndex);
 
    // 내부 제거 헬퍼
    void RemoveEntryById(uint64 SeqIndex);
private:
    struct FEntry
    {
        TWeakObjectPtr<UObject> Owner;
        TFunction<void()> Action;
        uint64 SeqIndex = 0;
        // 실제 엔진 핸들(로그/취소용)
        FTimerHandle TimerHandle;
    };
 
    // 키를 uint64 ID로 통일
    TMap<uint64, FEntry> Entries;
    
    // Owner -> 여러 ID
    TMultiMap<TWeakObjectPtr<UObject>, uint64> OwnerIndex;
 
    // ID 시퀀스
    uint64 NextSeqIndex = 1;
};