Add server autosave interval

Source/AgrarianGame/AgrarianGameGameMode.cpp

@@ -5,6 +5,7 @@
 #include "AgrarianDebugHUD.h"
 #include "AgrarianGameState.h"
 #include "AgrarianPersistenceSubsystem.h"
+#include "TimerManager.h"
 
 AAgrarianGameGameMode::AAgrarianGameGameMode()
 {
@@ -12,6 +13,22 @@ AAgrarianGameGameMode::AAgrarianGameGameMode()
 	HUDClass = AAgrarianDebugHUD::StaticClass();
 }
 
+void AAgrarianGameGameMode::BeginPlay()
+{
+	Super::BeginPlay();
+
+	if (HasAuthority() && ServerAutoSaveIntervalSeconds > 0.0f)
+	{
+		GetWorldTimerManager().SetTimer(
+			ServerAutoSaveTimerHandle,
+			this,
+			&AAgrarianGameGameMode::RunServerAutoSave,
+			ServerAutoSaveIntervalSeconds,
+			true,
+			ServerAutoSaveIntervalSeconds);
+	}
+}
+
 void AAgrarianGameGameMode::RestartPlayer(AController* NewPlayer)
 {
 	Super::RestartPlayer(NewPlayer);
@@ -35,3 +52,21 @@ void AAgrarianGameGameMode::Logout(AController* Exiting)
 
 	Super::Logout(Exiting);
 }
+
+void AAgrarianGameGameMode::RunServerAutoSave()
+{
+	if (!HasAuthority())
+	{
+		return;
+	}
+
+	UAgrarianPersistenceSubsystem* Persistence = GetGameInstance() ? GetGameInstance()->GetSubsystem<UAgrarianPersistenceSubsystem>() : nullptr;
+	if (!Persistence)
+	{
+		UE_LOG(LogTemp, Warning, TEXT("Agrarian server autosave skipped: persistence subsystem unavailable."));
+		return;
+	}
+
+	const bool bSaved = Persistence->SaveCurrentWorld();
+	UE_LOG(LogTemp, Log, TEXT("Agrarian server autosave %s."), bSaved ? TEXT("completed") : TEXT("failed"));
+}

Source/AgrarianGame/AgrarianGameGameMode.h

@@ -19,8 +19,17 @@ public:
 	/** Constructor */
 	AAgrarianGameGameMode();
 
+	virtual void BeginPlay() override;
 	virtual void RestartPlayer(AController* NewPlayer) override;
 	virtual void Logout(AController* Exiting) override;
+
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Agrarian|Persistence", meta = (ClampMin = "0"))
+	float ServerAutoSaveIntervalSeconds = 300.0f;
+
+protected:
+	void RunServerAutoSave();
+
+	FTimerHandle ServerAutoSaveTimerHandle;
 };