Load world state on server start

Source/AgrarianGame/AgrarianGameGameMode.cpp

@@ -3,8 +3,10 @@
 #include "AgrarianGameGameMode.h"
 #include "AgrarianGameCharacter.h"
 #include "AgrarianDebugHUD.h"
+#include "AgrarianCampfire.h"
 #include "AgrarianGameState.h"
 #include "AgrarianPersistenceSubsystem.h"
+#include "AgrarianShelterActor.h"
 #include "TimerManager.h"
 
 AAgrarianGameGameMode::AAgrarianGameGameMode()
@@ -17,6 +19,11 @@ void AAgrarianGameGameMode::BeginPlay()
 {
 	Super::BeginPlay();
 
+	if (HasAuthority())
+	{
+		LoadWorldOnServerStart();
+	}
+
 	if (HasAuthority() && ServerAutoSaveIntervalSeconds > 0.0f)
 	{
 		GetWorldTimerManager().SetTimer(
@@ -53,6 +60,51 @@ void AAgrarianGameGameMode::Logout(AController* Exiting)
 	Super::Logout(Exiting);
 }
 
+void AAgrarianGameGameMode::RegisterPersistentActorClasses(UAgrarianPersistenceSubsystem* Persistence) const
+{
+	if (!Persistence)
+	{
+		return;
+	}
+
+	Persistence->RegisterWorldActorClass(TEXT("primitive_shelter"), AAgrarianShelterActor::StaticClass());
+	Persistence->RegisterWorldActorClass(TEXT("campfire"), AAgrarianCampfire::StaticClass());
+}
+
+void AAgrarianGameGameMode::LoadWorldOnServerStart()
+{
+	if (!HasAuthority() || !bLoadWorldOnServerStart)
+	{
+		return;
+	}
+
+	UAgrarianPersistenceSubsystem* Persistence = GetGameInstance() ? GetGameInstance()->GetSubsystem<UAgrarianPersistenceSubsystem>() : nullptr;
+	if (!Persistence)
+	{
+		UE_LOG(LogTemp, Warning, TEXT("Agrarian startup load skipped: persistence subsystem unavailable."));
+		return;
+	}
+
+	RegisterPersistentActorClasses(Persistence);
+	if (!Persistence->DoesSaveExist())
+	{
+		UE_LOG(LogTemp, Log, TEXT("Agrarian startup load skipped: no save exists."));
+		return;
+	}
+
+	int32 RestoredPlayerCount = 0;
+	int32 RestoredActorCount = 0;
+	constexpr bool bClearExistingActors = false;
+	const bool bLoaded = Persistence->LoadCurrentWorld(RestoredPlayerCount, RestoredActorCount, bClearExistingActors);
+	UE_LOG(
+		LogTemp,
+		Log,
+		TEXT("Agrarian startup load %s. Restored players: %d. Restored actors: %d."),
+		bLoaded ? TEXT("completed") : TEXT("completed with world-state warning"),
+		RestoredPlayerCount,
+		RestoredActorCount);
+}
+
 void AAgrarianGameGameMode::RunServerAutoSave()
 {
 	if (!HasAuthority())

Source/AgrarianGame/AgrarianGameGameMode.h

@@ -26,7 +26,12 @@ public:
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|Persistence", meta = (ClampMin = "0"))
 	float ServerAutoSaveIntervalSeconds = 300.0f;
 
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|Persistence")
+	bool bLoadWorldOnServerStart = true;
+
 protected:
+	void RegisterPersistentActorClasses(UAgrarianPersistenceSubsystem* Persistence) const;
+	void LoadWorldOnServerStart();
 	void RunServerAutoSave();
 
 	FTimerHandle ServerAutoSaveTimerHandle;