Blueprint spawnable smart nav link component

FlameSmartNavLinkComponent.cpp

#include "FlameSmartNavLinkComponent.h"

#include "Navigation/PathFollowingComponent.h"

UFlameSmartNavLinkComponent::UFlameSmartNavLinkComponent()
{
	SetMoveReachedLink(this, &ThisClass::NotifySmartLinkReached);
}

void UFlameSmartNavLinkComponent::ResumePathFollowing(AActor* Agent)
{
	if (Agent)
	{
		UPathFollowingComponent* PathComp = Agent->FindComponentByClass<UPathFollowingComponent>();
		if (!PathComp)
		{
			APawn* PawnOwner = Cast<APawn>(Agent);
			if (PawnOwner && PawnOwner->GetController())
			{
				PathComp = PawnOwner->GetController()->FindComponentByClass<UPathFollowingComponent>();
			}
		}

		if (PathComp)
		{
			PathComp->FinishUsingCustomLink(this);
		}
	}
}

void UFlameSmartNavLinkComponent::K2_SetEnabled(bool bNewEnabled)
{
	SetEnabled(bNewEnabled);
}

void UFlameSmartNavLinkComponent::NotifySmartLinkReached(UNavLinkCustomComponent* LinkComp, UObject* PathingAgent, const FVector& DestPoint)
{
	UPathFollowingComponent* PathComp = Cast<UPathFollowingComponent>(PathingAgent);
	if (PathComp)
	{
		AActor* PathOwner = PathComp->GetOwner();
		AController* ControllerOwner = Cast<AController>(PathOwner);
		if (ControllerOwner)
		{
			PathOwner = ControllerOwner->GetPawn();
		}

		OnSmartLinkReached.Broadcast(PathOwner, DestPoint);
	}
}

FlameSmartNavLinkComponent.h

#include "CoreMinimal.h"
#include "NavLinkCustomComponent.h"
#include "FlameSmartNavLinkComponent.generated.h"

DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FSmartNavLinkReachedDelegate, AActor*, Agent, const FVector&, Destination);

/**
 * Equivalent to the "smart link" functionality of ANavLinkProxy, but with support for adding it to custom blueprints.
 */
UCLASS(ClassGroup = "Navigation", meta = (BlueprintSpawnableComponent))
class FLAME_API UFlameSmartNavLinkComponent : public UNavLinkCustomComponent
{
	GENERATED_BODY()

public:
	UFlameSmartNavLinkComponent();

	UPROPERTY(BlueprintAssignable)
	FSmartNavLinkReachedDelegate OnSmartLinkReached;

	UFUNCTION(BlueprintCallable, Category = "AI|Navigation")
	void ResumePathFollowing(AActor* Agent);

	UFUNCTION(BlueprintCallable, Category = "AI|Navigation", meta = (DisplayName = "Set Enabled"))
	void K2_SetEnabled(bool bNewEnabled);

	UFUNCTION(BlueprintCallable, Category = "AI|Navigation", meta = (DisplayName = "Is Enabled"))
	FORCEINLINE bool K2_IsEnabled() const { return IsEnabled(); }

	UFUNCTION(BlueprintCallable, Category = "AI|Navigation", meta = (DisplayName = "Has Moving Agents"))
	FORCEINLINE bool K2_HasMovingAgents() const { return HasMovingAgents(); }

private:
	void NotifySmartLinkReached(UNavLinkCustomComponent* LinkComp, UObject* PathingAgent, const FVector& DestPoint);
};