DisplayClusterEventWrapper.h

#pragma once

#include "IDisplayCluster.h"
#include "Cluster/IDisplayClusterClusterManager.h"
#include "Cluster/DisplayClusterClusterEvent.h"
#include "DisplayClusterEventParameterHelper.h"
#include "Templates/IsInvocable.h"

static constexpr int32 CLUSTER_EVENT_WRAPPER_EVENT_ID = 1337420;

template <typename MemberFunctionType, MemberFunctionType MemberFunction>
class ClusterEventWrapperEvent;

template <typename ObjectType, typename ReturnType, typename... ArgTypes,
		  ReturnType (ObjectType::*MemberFunction)(ArgTypes...)>
class ClusterEventWrapperEvent<ReturnType (ObjectType::*)(ArgTypes...), MemberFunction>
{
	static_assert(TIsDerivedFrom<ObjectType, UObject>::IsDerived, "Object needs to derive from UObject");

public:
	using MemberFunctionType = decltype(MemberFunction);

	ClusterEventWrapperEvent(const TCHAR* MethodName) : MethodName{MethodName} {}

	void Attach(ObjectType* NewObject)
	{

		UE_LOG(LogTemp, Warning, TEXT("[DisplayClusterEventWrapper] Attach()."))
		
		checkf(Object == nullptr, TEXT("The event is already attached."));
		Object = NewObject;
		ObjectId = Object->GetUniqueID();
		
		UE_LOG(LogTemp, Warning, TEXT("[DisplayClusterEventWrapper] Object UniqueID: %d."), ObjectId)

		EDisplayClusterOperationMode OperationMode = IDisplayCluster::Get().GetOperationMode();
		if (OperationMode == EDisplayClusterOperationMode::Cluster)
		{
			IDisplayClusterClusterManager* ClusterManager = IDisplayCluster::Get().GetClusterMgr();
			check(ClusterManager != nullptr);

			check(!ClusterEventListenerDelegate.IsBound());
			ClusterEventListenerDelegate = FOnClusterEventBinaryListener::CreateLambda(
				[this](const FDisplayClusterClusterEventBinary& Event)
				{
					if (Event.EventId != CLUSTER_EVENT_WRAPPER_EVENT_ID)
					{
						return;
					}

					FMemoryReader MemoryReader(Event.EventData);

					uint32 EventObjectId;
					// This reads the value!
					MemoryReader << EventObjectId;
					if (EventObjectId != ObjectId)
					{
						// Event does not belong to this object.
						UE_LOG(LogTemp, Warning, TEXT("[DisplayClusterEventWrapper] Event does not belong to this object %d vs %d (this object)."), EventObjectId, ObjectId)
						return;
					}

					FString EventMethodName;
					// This reads the value!
					MemoryReader << EventMethodName;
					if (EventMethodName != MethodName)
					{
						// This event does not belong to this method.
						UE_LOG(LogTemp, Warning, TEXT("[DisplayClusterEventWrapper] This event does not belong to this method. %s vs %s (this object)."), *EventMethodName, *MethodName)
						return;