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// Copyright 2016 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <type_traits>
#include <vector>
#include "Common/Config/ConfigInfo.h"
#include "Common/Config/Enums.h"
#include "Common/StringUtil.h"
namespace Config
{
namespace detail
{
template <typename T, std::enable_if_t<!std::is_enum<T>::value>* = nullptr>
std::optional<T> TryParse(const std::string& str_value)
{
T value;
if (!::TryParse(str_value, &value))
return std::nullopt;
return value;
}
template <typename T, std::enable_if_t<std::is_enum<T>::value>* = nullptr>
std::optional<T> TryParse(const std::string& str_value)
{
const auto result = TryParse<std::underlying_type_t<T>>(str_value);
if (result)
return static_cast<T>(*result);
return {};
}
template <>
inline std::optional<std::string> TryParse(const std::string& str_value)
{
return str_value;
}
}
template <typename T>
struct ConfigInfo;
class Layer;
using LayerMap = std::map<ConfigLocation, std::optional<std::string>>;
class ConfigLayerLoader
{
public:
explicit ConfigLayerLoader(LayerType layer);
virtual ~ConfigLayerLoader();
virtual void Load(Layer* config_layer) = 0;
virtual void Save(Layer* config_layer) = 0;
LayerType GetLayer() const;
private:
const LayerType m_layer;
};
class Section
{
public:
using iterator = LayerMap::iterator;
Section(iterator begin_, iterator end_) : m_begin(begin_), m_end(end_) {}
iterator begin() const { return m_begin; }
iterator end() const { return m_end; }
private:
iterator m_begin;
iterator m_end;
};
class ConstSection
{
public:
using iterator = LayerMap::const_iterator;
ConstSection(iterator begin_, iterator end_) : m_begin(begin_), m_end(end_) {}
iterator begin() const { return m_begin; }
iterator end() const { return m_end; }
private:
iterator m_begin;
iterator m_end;
};
class Layer
{
public:
explicit Layer(LayerType layer);
explicit Layer(std::unique_ptr<ConfigLayerLoader> loader);
virtual ~Layer();
// Convenience functions
bool Exists(const ConfigLocation& location) const;
bool DeleteKey(const ConfigLocation& location);
void DeleteAllKeys();
template <typename T>
T Get(const ConfigInfo<T>& config_info)
{
return Get<T>(config_info.location).value_or(config_info.default_value);
}
template <typename T>
std::optional<T> Get(const ConfigLocation& location)
{
const std::optional<std::string>& str_value = m_map[location];
if (!str_value)
return std::nullopt;
return detail::TryParse<T>(*str_value);
}
template <typename T>
void Set(const ConfigInfo<T>& config_info, const std::common_type_t<T>& value)
{
Set(config_info.location, value);
}
template <typename T>
void Set(const ConfigLocation& location, const T& value)
{
Set(location, ValueToString(value));
}
void Set(const ConfigLocation& location, const std::string& new_value)
{
std::optional<std::string>& current_value = m_map[location];
if (current_value == new_value)
return;
m_is_dirty = true;
current_value = new_value;
}
Section GetSection(System system, const std::string& section);
ConstSection GetSection(System system, const std::string& section) const;
// Explicit load and save of layers
void Load();
void Save();
LayerType GetLayer() const;
const LayerMap& GetLayerMap() const;
protected:
bool m_is_dirty = false;
LayerMap m_map;
const LayerType m_layer;
std::unique_ptr<ConfigLayerLoader> m_loader;
};
}
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