luanti/src/script/lua_api/l_playermeta.cpp

// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
// Copyright (C) 2017-8 rubenwardy <rw@rubenwardy.com>

#include "lua_api/l_playermeta.h"
#include "lua_api/l_internal.h"
#include "common/c_content.h"
#include "serverenvironment.h"
#include "remoteplayer.h"
#include "server/player_sao.h"

/*
	PlayerMetaRef
*/

IMetadata *PlayerMetaRef::getmeta(bool auto_create)
{
	auto *player = m_env->getPlayer(m_name);
	auto *sao = player ? player->getPlayerSAO() : nullptr;
	return sao ? &sao->getMeta() : nullptr;
}

void PlayerMetaRef::clearMeta()
{
	if (auto *meta = getmeta(true))
		meta->clear();
}

void PlayerMetaRef::reportMetadataChange(const std::string *name)
{
	// the server saves these on its own
}

// Creates an PlayerMetaRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
void PlayerMetaRef::create(lua_State *L, ServerEnvironment *env, std::string_view name)
{
	PlayerMetaRef *o = new PlayerMetaRef(env, name);
	*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
	luaL_getmetatable(L, className);
	lua_setmetatable(L, -2);
}

void PlayerMetaRef::Register(lua_State *L)
{
	registerMetadataClass(L, className, methods);
}

const char PlayerMetaRef::className[] = "PlayerMetaRef";
const luaL_Reg PlayerMetaRef::methods[] = {
	luamethod(MetaDataRef, contains),
	luamethod(MetaDataRef, get),
	luamethod(MetaDataRef, get_string),
	luamethod(MetaDataRef, set_string),
	luamethod(MetaDataRef, get_int),
	luamethod(MetaDataRef, set_int),
	luamethod(MetaDataRef, get_float),
	luamethod(MetaDataRef, set_float),
	luamethod(MetaDataRef, get_keys),
	luamethod(MetaDataRef, to_table),
	luamethod(MetaDataRef, from_table),
	luamethod(MetaDataRef, equals),
	{0,0}
};