LiveConfigJson.h

// Copyright (c) 2026 Nicholas Arthur
// Licensed under the MIT License
 
#pragma once
 
#include "CoreMinimal.h"
#include "Subsystems/EngineSubsystem.h"
#include "LiveConfigSystem.h"
#include "LiveConfigJson.generated.h"
 
UCLASS(BlueprintType)
class LIVECONFIG_API ULiveConfigJsonSystem : public UEngineSubsystem
{
    GENERATED_BODY()
public:
    static ULiveConfigJsonSystem* Get();
    
    // USubsystem
    virtual void Initialize(FSubsystemCollectionBase& Collection) override;
    virtual void Deinitialize() override;
    // ~USubsystem
    
    void LoadJsonFromFiles();
 
    UFUNCTION(Exec)
    void VerifyJsonIntegrity();
 
    void SavePropertyToFile(const FLiveConfigPropertyDefinition& PropertyDefinition);
    void DeletePropertyFile(FName PropertyName);
    void RenamePropertyOnDisk(FName OldPropertyName, FName NewPropertyName);
 
    static FString GetPropertyPath(FName PropertyName);
    static FString GetLiveConfigDirectory();
    
    void FlushPendingSaves();
 
    // for testing
    bool bDisableFileOperations = false;
private:
    void LoadJsonFromDirectory(const FString& Dir);
    void LoadJsonFromFile(const FString& Path, const FString& FileName);
    
    void QueueSave();
    bool OnTick(float DeltaTime);
 
    TMap<FName, FLiveConfigPropertyDefinition> QueuedSaves;
    TSet<FName> QueuedDeletions;
    FTSTicker::FDelegateHandle TickHandle;
};