OpenMW/apps/openmw/mwlua/localscripts.hpp

#ifndef MWLUA_LOCALSCRIPTS_H
#define MWLUA_LOCALSCRIPTS_H

#include <memory>
#include <set>
#include <string>

#include <components/lua/luastate.hpp>
#include <components/lua/scriptscontainer.hpp>

#include "../mwbase/luamanager.hpp"

#include "object.hpp"

namespace MWLua
{
    struct Context;

    struct SelfObject : public LObject
    {
        class CachedStat
        {
        public:
            using Setter = void (*)(int, std::string_view, const MWWorld::Ptr&, const sol::object&);

        private:
            Setter mSetter; // Function that updates a stat's property
            int mIndex; // Optional index to disambiguate the stat
            std::string_view mProp; // Name of the stat's property
        public:
            CachedStat(Setter setter, int index, std::string_view prop)
                : mSetter(setter)
                , mIndex(index)
                , mProp(std::move(prop))
            {
            }

            void operator()(const MWWorld::Ptr& ptr, const sol::object& object) const
            {
                mSetter(mIndex, mProp, ptr, object);
            }

            bool operator<(const CachedStat& other) const
            {
                return std::tie(mSetter, mIndex, mProp) < std::tie(other.mSetter, other.mIndex, other.mProp);
            }
        };

        SelfObject(const LObject& obj)
            : LObject(obj)
            , mIsActive(false)
        {
        }
        MWBase::LuaManager::ActorControls mControls;
        std::map<CachedStat, sol::object> mStatsCache;
        bool mIsActive;
    };

    class LocalScripts : public LuaUtil::ScriptsContainer
    {
    public:
        static void initializeSelfPackage(const Context&);
        LocalScripts(LuaUtil::LuaState* lua, const LObject& obj);

        MWBase::LuaManager::ActorControls* getActorControls() { return &mData.mControls; }
        const MWWorld::Ptr& getPtr() const { return mData.ptr(); }

        struct OnActive
        {
        };
        struct OnInactive
        {
        };
        struct OnActivated
        {
            LObject mActivatingActor;
        };
        struct OnConsume
        {
            LObject mConsumable;
        };
        using EngineEvent = std::variant<OnActive, OnInactive, OnConsume, OnActivated>;

        void receiveEngineEvent(const EngineEvent&);

        void applyStatsCache();

    protected:
        SelfObject mData;

    private:
        EngineHandlerList mOnActiveHandlers{ "onActive" };
        EngineHandlerList mOnInactiveHandlers{ "onInactive" };
        EngineHandlerList mOnConsumeHandlers{ "onConsume" };
        EngineHandlerList mOnActivatedHandlers{ "onActivated" };
    };

}

#endif // MWLUA_LOCALSCRIPTS_H