DlgJsonParser.h

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// Copyright Csaba Molnar, Daniel Butum. All Rights Reserved.
#pragma once
 
#include "CoreTypes.h"
#include "Logging/LogMacros.h"
#include "Dom/JsonValue.h"
#include "Dom/JsonObject.h"
 
#include "IDlgParser.h"
#include "NYReflectionTypes.h"
 
DECLARE_LOG_CATEGORY_EXTERN(LogDlgJsonParser, All, All);
 
 
class DLGSYSTEM_API FDlgJsonParser : public IDlgParser
{
public:
    FDlgJsonParser() {}
 
    FDlgJsonParser(const FString& FilePath)
    {
        InitializeParser(FilePath);
    }
 
    // IDlgParser Interface
    void InitializeParser(const FString& FilePath) override;
    void InitializeParserFromString(const FString& Text) override;
    bool IsValidFile() const override { return bIsValidFile; }
    void ReadAllProperty(const UStruct* ReferenceClass, void* TargetObject, UObject* DefaultObjectOuter = nullptr) override;
 
 
private: // JSON -> UStruct
 
    bool ConvertScalarJsonValueToProperty(const TSharedPtr<FJsonValue>& JsonValue, FNYProperty* Property, void* ContainerPtr, void* ValuePtr);
 
    bool JsonValueToProperty(const TSharedPtr<FJsonValue>& JsonValue, FNYProperty* Property, void* ContainerPtr, void* ValuePtr);
 
    bool JsonAttributesToUStruct(const TMap<FString, TSharedPtr<FJsonValue>>& JsonAttributes,
                                const UStruct* StructDefinition, void* ContainerPtr);
 
    bool JsonObjectToUStruct(const TSharedRef<const FJsonObject>& JsonObject, const UStruct* StructDefinition, void* ContainerPtr)
    {
        return JsonAttributesToUStruct(JsonObject->Values, StructDefinition, ContainerPtr);
    }
 
    bool JsonObjectStringToUStruct(const UStruct* StructDefinition, void* ContainerPtr);
 
private:
    FString JsonString;
    FString FileName;
    bool bIsValidFile = false;
 
    UObject* DefaultObjectOuter = nullptr;
 
    static constexpr int64 CheckFlags = ~CPF_ParmFlags;
};