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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include "lua_api/l_base.h"
#include "lua_api/l_metadata.h"
#include "irrlichttypes_bloated.h"
#include "nodemetadata.h"
class ServerEnvironment;
class NodeMetadata;
/*
NodeMetaRef
*/
class NodeMetaRef : public MetaDataRef {
private:
bool m_is_local = false;
// Set for server metadata
v3s16 m_p;
ServerEnvironment *m_env = nullptr;
// Set for client metadata
Metadata *m_local_meta = nullptr;
static const char className[];
static const luaL_Reg methodsServer[];
static const luaL_Reg methodsClient[];
static NodeMetaRef *checkobject(lua_State *L, int narg);
/**
* Retrieve metadata for a node.
* If @p auto_create is set and the specified node has no metadata information
* associated with it yet, the method attempts to attach a new metadata object
* to the node and returns a pointer to the metadata when successful.
*
* However, it is NOT guaranteed that the method will return a pointer,
* and @c NULL may be returned in case of an error regardless of @p auto_create.
*
* @param ref specifies the node for which the associated metadata is retrieved.
* @param auto_create when true, try to create metadata information for the node if it has none.
* @return pointer to a @c NodeMetadata object or @c NULL in case of error.
*/
virtual Metadata* getmeta(bool auto_create);
virtual void clearMeta();
virtual void reportMetadataChange(const std::string *name = nullptr);
virtual void handleToTable(lua_State *L, Metadata *_meta);
virtual bool handleFromTable(lua_State *L, int table, Metadata *_meta);
// Exported functions
// garbage collector
static int gc_object(lua_State *L);
// get_inventory(self)
static int l_get_inventory(lua_State *L);
// mark_as_private(self, <string> or {<string>, <string>, ...})
static int l_mark_as_private(lua_State *L);
public:
NodeMetaRef(v3s16 p, ServerEnvironment *env);
NodeMetaRef(Metadata *meta);
~NodeMetaRef() = default;
// Creates an NodeMetaRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
static void create(lua_State *L, v3s16 p, ServerEnvironment *env);
// Client-sided version of the above
static void createClient(lua_State *L, Metadata *meta);
static void RegisterCommon(lua_State *L);
static void Register(lua_State *L);
static void RegisterClient(lua_State *L);
};
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