Add projectile lifespan to return object to pool if no collision

Source/vampires/Projectile.cpp

@@ -56,6 +56,11 @@ void AProjectile::SetActorHiddenInGame(bool bNewHidden)
 	if (bNewHidden)
 	{
 		ResetData_Implementation();
+		GetWorldTimerManager().ClearTimer(ProjectileLifetimeTimerHandle);
+	}
+	else
+	{
+		GetWorldTimerManager().SetTimer(ProjectileLifetimeTimerHandle, this, &AProjectile::ReturnProjectileToPool, ProjectileLifespan, true);		
 	}
 }
 
@@ -110,6 +115,14 @@ void AProjectile::OnProjectileBeginOverlap(UPrimitiveComponent* OverlappedCompon
 			RemainingDamagableEnemies--;
 
 			if (RemainingDamagableEnemies == 0)
+			{
+				ReturnProjectileToPool();
+			}
+		}
+	}
+}
+
+void AProjectile::ReturnProjectileToPool()
 {
 	AGameModeBase* gamemode = UGameplayStatics::GetGameMode(GetWorld());
 
@@ -122,6 +135,3 @@ void AProjectile::OnProjectileBeginOverlap(UPrimitiveComponent* OverlappedCompon
 		}
 	}
 }
-		}
-	}
-}

Source/vampires/Projectile.h

@@ -38,6 +38,12 @@ public:
 	UPROPERTY(EditDefaultsOnly, BlueprintReadWrite)
 	TObjectPtr<UNiagaraComponent> NiagaraRibbonComponent = nullptr;
 
+	UPROPERTY(EditDefaultsOnly, BlueprintReadWrite)
+	float ProjectileLifespan = 15.0f;
+
+private:
+	FTimerHandle ProjectileLifetimeTimerHandle;
+	
 	// Sets default values for this actor's properties
 	AProjectile();
 
@@ -59,4 +65,7 @@ private:
 	void OnProjectileBeginOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
 	                              UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep,
 	                              const FHitResult& SweepResult);
+
+	UFUNCTION()
+	void ReturnProjectileToPool();
 };