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#ifndef COMPONENTS_LUA_STORAGE_H
#define COMPONENTS_LUA_STORAGE_H
#include <map>
#include <sol/sol.hpp>
#include "serialization.hpp"
namespace LuaUtil
{
class LuaStorage
{
public:
static void initLuaBindings(lua_State*);
explicit LuaStorage(lua_State* lua) : mLua(lua) {}
void clearTemporary();
void load(const std::string& path);
void save(const std::string& path) const;
sol::object getReadOnlySection(std::string_view sectionName);
sol::object getMutableSection(std::string_view sectionName);
sol::table getAllSections();
void set(std::string_view section, std::string_view key, const sol::object& value) { getSection(section)->set(key, value); }
using ListenerFn = std::function<void(std::string_view, std::string_view, const sol::object&)>;
void setListener(ListenerFn fn) { mListener = std::move(fn); }
private:
class Value
{
public:
Value() {}
Value(const sol::object& value) : mSerializedValue(serialize(value)) {}
sol::object getCopy(lua_State* L) const;
sol::object getReadOnly(lua_State* L) const;
private:
std::string mSerializedValue;
mutable sol::object mReadOnlyValue = sol::nil;
};
struct Section
{
explicit Section(LuaStorage* storage, std::string name) : mStorage(storage), mSectionName(std::move(name)) {}
const Value& get(std::string_view key) const;
void set(std::string_view key, const sol::object& value);
bool wasChanged(int64_t& lastCheck);
sol::table asTable();
LuaStorage* mStorage;
std::string mSectionName;
std::map<std::string, Value, std::less<>> mValues;
bool mPermanent = true;
int64_t mChangeCounter = 0;
static Value sEmpty;
};
struct SectionMutableView
{
std::shared_ptr<Section> mSection = nullptr;
int64_t mLastCheck = 0;
};
struct SectionReadOnlyView
{
std::shared_ptr<Section> mSection = nullptr;
int64_t mLastCheck = 0;
};
const std::shared_ptr<Section>& getSection(std::string_view sectionName);
lua_State* mLua;
std::map<std::string_view, std::shared_ptr<Section>> mData;
std::optional<ListenerFn> mListener;
};
}
#endif // COMPONENTS_LUA_STORAGE_H
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