FlaxEngine/Source/Engine/Serialization/JsonTools.h

// Copyright (c) Wojciech Figat. All rights reserved.

#pragma once

#include "Json.h"
#include "Engine/Core/Types/String.h"
#include "Engine/Core/Types/Guid.h"
#include "Engine/Core/Types/DateTime.h"
#include "Engine/Core/Math/BoundingBox.h"
#include "Engine/Core/Math/BoundingSphere.h"
#include "Engine/Core/Math/Vector2.h"
#include "Engine/Core/Math/Vector3.h"
#include "Engine/Core/Math/Vector4.h"
#include "Engine/Core/Math/Color.h"
#include "Engine/Core/Math/Quaternion.h"
#include "Engine/Core/Math/Ray.h"
#include "Engine/Core/Math/Transform.h"
#include "Engine/Core/Math/Rectangle.h"
#include "Engine/Core/Math/Plane.h"
#include "Engine/Core/Math/Matrix.h"
#include "ISerializable.h"

struct CommonValue;

/// <summary>
/// Json value container utilities.
/// </summary>
class FLAXENGINE_API JsonTools
{
public:
    typedef rapidjson_flax::Document Document;
    typedef rapidjson_flax::Value Value;

public:
    FORCE_INLINE static void MergeDocuments(Document& target, Document& source)
    {
        MergeObjects(target, source, target.GetAllocator());
    }

    static void MergeObjects(Value& target, Value& source, Value::AllocatorType& allocator)
    {
        ASSERT(target.IsObject() && source.IsObject());
        for (auto itr = source.MemberBegin(); itr != source.MemberEnd(); ++itr)
            target.AddMember(itr->name, itr->value, allocator);
    }

    static void ChangeIds(Document& doc, const Dictionary<Guid, Guid, HeapAllocation>& mapping);

public:
    FORCE_INLINE static Vector2 GetVector2(const Value& value)
    {
#if USE_LARGE_WORLDS
        return GetDouble2(value);
#else
        return GetFloat2(value);
#endif
    }

    FORCE_INLINE static Vector3 GetVector3(const Value& value)
    {
#if USE_LARGE_WORLDS
        return GetDouble3(value);
#else
        return GetFloat3(value);
#endif
    }

    FORCE_INLINE static Vector4 GetVector4(const Value& value)
    {
#if USE_LARGE_WORLDS
        return GetDouble4(value);
#else
        return GetFloat4(value);
#endif
    }

    static Float2 GetFloat2(const Value& value);
    static Float3 GetFloat3(const Value& value);
    static Float4 GetFloat4(const Value& value);

    static Double2 GetDouble2(const Value& value);
    static Double3 GetDouble3(const Value& value);
    static Double4 GetDouble4(const Value& value);

    static Color GetColor(const Value& value);
    static Quaternion GetQuaternion(const Value& value);
    static Ray GetRay(const Value& value);
    static Matrix GetMatrix(const Value& value);
    static Transform GetTransform(const Value& value);
    static void GetTransform(Transform& result, const Value& value);
    static Plane GetPlane(const Value& value);

    static Rectangle GetRectangle(const Value& value)
    {
        return Rectangle(
            GetVector2(value, "Location", Vector2::Zero),
            GetVector2(value, "Size", Vector2::Zero)
        );
    }

    static BoundingSphere GetBoundingSphere(const Value& value);
    static BoundingBox GetBoundingBox(const Value& value);
    static Guid GetGuid(const Value& value);
    static DateTime GetDate(const Value& value);
    static DateTime GetDateTime(const Value& value);
    static CommonValue GetCommonValue(const Value& value);

public:
    FORCE_INLINE static String GetString(const Value& node, const char* name)
    {
        auto member = node.FindMember(name);
        return member != node.MemberEnd() ? member->value.GetText() : String::Empty;
    }

public:
    FORCE_INLINE static bool GetBool(const Value& node, const char* name, const bool defaultValue)
    {
        auto member = node.FindMember(name);
        return member != node.MemberEnd() ? member->value.GetBool() : defaultValue;
    }

    FORCE_INLINE static float GetFloat(const Value& node, const char* name, const float defaultValue)
    {
        auto member = node.FindMember(name);
        return member != node.MemberEnd() && member->value.IsNumber() ? member->value.GetFloat() : defaultValue;
    }

    FORCE_INLINE static int32 GetInt(const Value& node, const char* name, const int32 defaultValue)
    {
        auto member = node.FindMember(name);
        return member != node.MemberEnd() && member->value.IsInt() ? member->value.GetInt() : defaultValue;
    }

    template<class T>
    FORCE_INLINE static T GetEnum(const Value& node, const char* name, const T defaultValue)
    {
        auto member = node.FindMember(name);
        return member != node.MemberEnd() && member->value.IsInt() ? static_cast<T>(member->value.GetInt()) : defaultValue;
    }

    FORCE_INLINE static String GetString(const Value& node, const char* name, const String& defaultValue)
    {
        auto member = node.FindMember(name);
        return member != node.MemberEnd() ? member->value.GetText() : defaultValue;
    }

#define DECLARE_GETTER(type) \
	FORCE_INLINE static type Get##type(const Value& node, const char* name, const type& defaultValue) \
	{ \
		const auto member = node.FindMember(name); \
		return member != node.MemberEnd() ? Get##type(member->value) : defaultValue; \
	}

    DECLARE_GETTER(Rectangle);
    DECLARE_GETTER(Transform);
    DECLARE_GETTER(Vector2);
    DECLARE_GETTER(Vector3);
    DECLARE_GETTER(Vector4);
    DECLARE_GETTER(Float2);
    DECLARE_GETTER(Float3);
    DECLARE_GETTER(Float4);
    DECLARE_GETTER(Double2);
    DECLARE_GETTER(Double3);
    DECLARE_GETTER(Double4);
    DECLARE_GETTER(Color);
    DECLARE_GETTER(Quaternion);
    DECLARE_GETTER(BoundingBox);
    DECLARE_GETTER(BoundingSphere);
    DECLARE_GETTER(Matrix);
    DECLARE_GETTER(Ray);
    DECLARE_GETTER(Plane);
    DECLARE_GETTER(DateTime);

#undef DECLARE_GETTER

    FORCE_INLINE static Guid GetGuid(const Value& node, const char* name)
    {
        auto member = node.FindMember(name);
        return member != node.MemberEnd() ? GetGuid(member->value) : Guid::Empty;
    }

    FORCE_INLINE static bool GetGuidIfValid(Guid& result, const Value& node, const char* name)
    {
        auto member = node.FindMember(name);
        if (member != node.MemberEnd())
        {
            result = GetGuid(member->value);
            return result.IsValid();
        }
        return false;
    }

public:
    FORCE_INLINE static void GetBool(bool& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsBool())
        {
            result = member->value.GetBool();
        }
    }

    FORCE_INLINE static void GetFloat(float& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsNumber())
        {
            result = member->value.GetFloat();
        }
    }

    FORCE_INLINE static void GetInt(byte& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsInt())
        {
            result = (byte)member->value.GetInt();
        }
    }

    FORCE_INLINE static void GetInt(int32& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsInt())
        {
            result = member->value.GetInt();
        }
    }

    FORCE_INLINE static void GetInt(uint32& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsInt())
        {
            result = (uint32)member->value.GetInt();
        }
    }

    FORCE_INLINE static void GetInt(int16& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsInt())
        {
            result = (int16)member->value.GetInt();
        }
    }

    FORCE_INLINE static void GetInt(uint16& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsInt())
        {
            result = (uint16)member->value.GetInt();
        }
    }

    template<class T>
    FORCE_INLINE static void GetEnum(T& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd() && member->value.IsInt())
        {
            result = static_cast<T>(member->value.GetInt());
        }
    }

    FORCE_INLINE static void GetString(String& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd())
        {
            result = member->value.GetText();
        }
    }

#define DECLARE_GETTER(type) \
	FORCE_INLINE static void Get##type(type& result, const Value& node, const char* name) \
	{ \
		const auto member = node.FindMember(name); \
		if (member != node.MemberEnd()) \
		{ \
			result = Get##type(member->value); \
		} \
	}

    DECLARE_GETTER(Rectangle);
    DECLARE_GETTER(Vector2);
    DECLARE_GETTER(Vector3);
    DECLARE_GETTER(Vector4);
    DECLARE_GETTER(Float2);
    DECLARE_GETTER(Float3);
    DECLARE_GETTER(Float4);
    DECLARE_GETTER(Double2);
    DECLARE_GETTER(Double3);
    DECLARE_GETTER(Double4);
    DECLARE_GETTER(Color);
    DECLARE_GETTER(Quaternion);
    DECLARE_GETTER(BoundingBox);
    DECLARE_GETTER(BoundingSphere);
    DECLARE_GETTER(Ray);
    DECLARE_GETTER(Plane);
    DECLARE_GETTER(DateTime);

#undef DECLARE_GETTER

#define DECLARE_GETTER(type) \
	FORCE_INLINE static void Get##type(type& result, const Value& node, const char* name) \
	{ \
		const auto member = node.FindMember(name); \
		if (member != node.MemberEnd()) \
		{ \
			Get##type(result, member->value); \
		} \
	}

    DECLARE_GETTER(Transform);

#undef DECLARE_GETTER

    template<typename T>
    FORCE_INLINE static void GetReference(T& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd())
        {
            result = GetGuid(member->value);
        }
    }

    FORCE_INLINE static void GetGuid(Guid& result, const Value& node, const char* name)
    {
        const auto member = node.FindMember(name);
        if (member != node.MemberEnd())
        {
            result = GetGuid(member->value);
        }
    }
};