Game Manager for UE4 - Split code out from Game Instance

GameManager.cpp

// Copyright Redpoint Games 2018, MIT Licensed.

#include "GameManager.h"
#include "Engine.h"

UGameManager::UGameManager(const FObjectInitializer& ObjectInitializer)
	: Super(ObjectInitializer)
{
}

void UGameManager::FinishDestroy()
{
	Super::FinishDestroy();
}

UWorld* UGameManager::GetWorld() const
{
	UGameInstance* GameInstance = Cast<UGameInstance>(GetOuter());

	if (GameInstance == nullptr)
	{
		return nullptr;
	}

	struct FWorldContext* WorldContext = GameInstance->GetWorldContext();
	if (WorldContext != nullptr)
	{
		return WorldContext->World();
	}

	return nullptr;
}

FTimerManager* UGameManager::GetTimerManager() const
{
	UGameInstance* GameInstance = Cast<UGameInstance>(GetOuter());

	if (GameInstance == nullptr)
	{
		return nullptr;
	}

	return GameInstance->TimerManager; 
}

FLatentActionManager* UGameManager::GetLatentActionManager() const
{
	UGameInstance* GameInstance = Cast<UGameInstance>(GetOuter());

	if (GameInstance == nullptr)
	{
		return nullptr;
	}

	return GameInstance->LatentActionManager; 
}

GameManager.h

// Copyright Redpoint Games 2018, MIT Licensed.

#pragma once

#include "CoreMinimal.h"
#include "ObjectMacros.h"
#include "TimerManager.h"
#include "Engine/LatentActionManager.h"
#include "Engine/GameInstance.h"
#include "GameManager.generated.h"

/**
 * The base class for game managers, which are persist objects that are capable of latent actions, similar to the game instance.
 */
UCLASS(Transient, BlueprintType, Blueprintable)
class MINUTEOFMAYHEM_API UGameManager : public UObject
{
	GENERATED_UCLASS_BODY()

public:
	//~ Begin UObject Interface
	virtual class UWorld* GetWorld() const override;
	virtual void FinishDestroy() override;
	//~ End UObject Interface

	FTimerManager* GetTimerManager() const;

	FLatentActionManager* GetLatentActionManager() const;
};