LiteLoaderBDS-1.16.40/LiteLoader/include/llapi/utils/PlayerMap.h

#pragma once
#include "llapi/Global.h"
class ServerPlayer;
struct DePlayerCB {
    void* userdata;
    void (*cb)(void*, ServerPlayer*);
    void operator()(ServerPlayer* sp) {
        cb(userdata, sp);
    }
};

LIAPI void _regDePlayerCB(DePlayerCB);

template <typename T>
class playerMap {
public:
    std::unordered_map<ServerPlayer*, T> _map;

private:
    static void onDelete(playerMap<T>& thi, ServerPlayer* sp) {
        thi._map.erase(sp);
    }

public:
    playerMap() {
        DePlayerCB cb;
        cb.userdata = this;
        cb.cb = (decltype(cb.cb))(&playerMap<T>::onDelete);
        _regDePlayerCB(cb);
    }
    inline T& get(ServerPlayer* sp) {
        auto it = _map.find(sp);
        if (it == _map.end()) {
            if constexpr (std::is_constructible<T, ServerPlayer&>()) {
                _map.emplace(sp, *sp);
            } else {
                _map.operator[](sp);
            }
            return get(sp);
        } else {
            return it->second;
        }
    }
    T& operator[](ServerPlayer* sp) {
        return get(sp);
    }
    T& operator[](ServerPlayer& sp) {
        return get(&sp);
    }
};