SpawnHub.h

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// Fill out your copyright notice in the Description page of Project Settings.
 
#pragma once
 
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include <concepts>
 
#include "CK_UE.h"
#include "Interface/Spawn/SpawnSystemInterface.h"
#include "SpawnHub.generated.h"
 
class UStageManagementSubsystem;
class UEnemySpawnDirectorSystemComponent;
class ITargetableInterface;
 
template <typename T>
concept CSpawnSystem = std::derived_from<T, UActorComponent> && std::derived_from<T, ISpawnSystemInterface>;
 
 
UCLASS()
class CK_UE_API ASpawnHub : public AActor
{
    GENERATED_BODY()
 
public:
    void InitializeHub(UStageManagementSubsystem* InStageManager);
    void RegisterSpawnSystem(UActorComponent* SpawnSystem);
    void UnregisterSpawnSystem(UActorComponent* SpawnSystem);
 
    TArray<ITargetableInterface*> GetAllSpawnedTargetableEntity() const;
 
    // 블루프린트에서 사용하는 진입점. C++에서는 GetOrCreateSpawnSystem<T>()를 사용한다.
    // MustImplement가 클래스 피커를 ISpawnSystemInterface 구현체로 좁힌다.
    UFUNCTION(BlueprintCallable, Category="SpawnHub", meta=(DeterminesOutputType="SpawnSystemClass"))
    UActorComponent* GetOrCreateSpawnSystem(UPARAM(meta=(MustImplement="/Script/CK_UE.SpawnSystemInterface")) TSubclassOf<UActorComponent> SpawnSystemClass);
 
public:
    template <CSpawnSystem TSpawnSystem>
    TSpawnSystem* GetSpawnSystem() const;
 
    template <CSpawnSystem TSpawnSystem>
    TSpawnSystem* GetOrCreateSpawnSystem();
 
    // 등록된 스폰 시스템 중 TSpawnSystem 타입인 것들만 추려서 반환한다.
    template <CSpawnSystem TSpawnSystem>
    TArray<TSpawnSystem*> GetRegisteredSpawnSystems() const;
 
private:
    UPROPERTY(Transient)
    TWeakObjectPtr<UStageManagementSubsystem> StageManager;
 
    UPROPERTY(Transient)
    TArray<TWeakObjectPtr<UActorComponent>> RegisteredSpawnSystems;
};
 
 
template <CSpawnSystem TSpawnSystem>
TSpawnSystem* ASpawnHub::GetSpawnSystem() const
{
    TSpawnSystem* SpawnSystem = FindComponentByClass<TSpawnSystem>();
 
    if (SpawnSystem == nullptr)
    {
        LOG_ERROR(LogCK, "%s가 존재하지 않습니다. ", NAMEOF(TSpawnSystem));
    }
 
    return SpawnSystem;
}
 
 
template <CSpawnSystem TSpawnSystem>
TSpawnSystem* ASpawnHub::GetOrCreateSpawnSystem()
{
    TSpawnSystem* SpawnSystem = FindComponentByClass<TSpawnSystem>();
 
    if (SpawnSystem)
    {
        RegisterSpawnSystem(SpawnSystem);
        return SpawnSystem;
    }
 
    SpawnSystem = NewObject<TSpawnSystem>(this, TSpawnSystem::StaticClass());
    SpawnSystem->RegisterComponent();
    SpawnSystem->Initialize(StageManager.Get());
    RegisterSpawnSystem(SpawnSystem);
    return SpawnSystem;
}
 
 
template <CSpawnSystem TSpawnSystem>
TArray<TSpawnSystem*> ASpawnHub::GetRegisteredSpawnSystems() const
{
    TArray<TSpawnSystem*> Result;
 
    for (const TWeakObjectPtr<UActorComponent>& Weak : RegisteredSpawnSystems)
    {
        if (TSpawnSystem* SpawnSystem = Cast<TSpawnSystem>(Weak.Get()))
        {
            Result.Add(SpawnSystem);
        }
    }
 
    return Result;
}