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/*
Minetest
Copyright (C) 2013 PilzAdam <pilzadam@minetest.net>
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.
*/
#include "lua_api/l_settings.h"
#include "lua_api/l_internal.h"
#include "cpp_api/s_security.h"
#include "settings.h"
#include "log.h"
// garbage collector
int LuaSettings::gc_object(lua_State* L)
{
LuaSettings* o = *(LuaSettings **)(lua_touserdata(L, 1));
delete o;
return 0;
}
// get(self, key) -> value
int LuaSettings::l_get(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
LuaSettings* o = checkobject(L, 1);
std::string key = std::string(luaL_checkstring(L, 2));
if (o->m_settings->exists(key)) {
std::string value = o->m_settings->get(key);
lua_pushstring(L, value.c_str());
} else {
lua_pushnil(L);
}
return 1;
}
// get_bool(self, key) -> boolean
int LuaSettings::l_get_bool(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
LuaSettings* o = checkobject(L, 1);
std::string key = std::string(luaL_checkstring(L, 2));
if (o->m_settings->exists(key)) {
bool value = o->m_settings->getBool(key);
lua_pushboolean(L, value);
} else {
lua_pushnil(L);
}
return 1;
}
// set(self, key, value)
int LuaSettings::l_set(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
LuaSettings* o = checkobject(L, 1);
std::string key = std::string(luaL_checkstring(L, 2));
const char* value = luaL_checkstring(L, 3);
if (!o->m_settings->set(key, value))
throw LuaError("Invalid sequence found in setting parameters");
return 0;
}
// remove(self, key) -> success
int LuaSettings::l_remove(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
LuaSettings* o = checkobject(L, 1);
std::string key = std::string(luaL_checkstring(L, 2));
bool success = o->m_settings->remove(key);
lua_pushboolean(L, success);
return 1;
}
// get_names(self) -> {key1, ...}
int LuaSettings::l_get_names(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
LuaSettings* o = checkobject(L, 1);
std::vector<std::string> keys = o->m_settings->getNames();
lua_newtable(L);
for (unsigned int i=0; i < keys.size(); i++)
{
lua_pushstring(L, keys[i].c_str());
lua_rawseti(L, -2, i + 1);
}
return 1;
}
// write(self) -> success
int LuaSettings::l_write(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
LuaSettings* o = checkobject(L, 1);
if (!o->m_write_allowed) {
throw LuaError("Settings: writing " + o->m_filename +
" not allowed with mod security on.");
}
bool success = o->m_settings->updateConfigFile(o->m_filename.c_str());
lua_pushboolean(L, success);
return 1;
}
// to_table(self) -> {[key1]=value1,...}
int LuaSettings::l_to_table(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
LuaSettings* o = checkobject(L, 1);
std::vector<std::string> keys = o->m_settings->getNames();
lua_newtable(L);
for (unsigned int i=0; i < keys.size(); i++)
{
lua_pushstring(L, o->m_settings->get(keys[i]).c_str());
lua_setfield(L, -2, keys[i].c_str());
}
return 1;
}
LuaSettings::LuaSettings(const char* filename, bool write_allowed)
{
m_write_allowed = write_allowed;
m_filename = std::string(filename);
m_settings = new Settings();
m_settings->readConfigFile(m_filename.c_str());
}
LuaSettings::~LuaSettings()
{
delete m_settings;
}
void LuaSettings::Register(lua_State* L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Can be created from Lua (Settings(filename))
lua_register(L, className, create_object);
}
// LuaSettings(filename)
// Creates an LuaSettings and leaves it on top of stack
int LuaSettings::create_object(lua_State* L)
{
NO_MAP_LOCK_REQUIRED;
bool write_allowed = true;
const char* filename = luaL_checkstring(L, 1);
CHECK_SECURE_PATH_POSSIBLE_WRITE(L, filename, &write_allowed);
LuaSettings* o = new LuaSettings(filename, write_allowed);
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
return 1;
}
LuaSettings* LuaSettings::checkobject(lua_State* L, int narg)
{
NO_MAP_LOCK_REQUIRED;
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(LuaSettings**)ud; // unbox pointer
}
const char LuaSettings::className[] = "Settings";
const luaL_reg LuaSettings::methods[] = {
luamethod(LuaSettings, get),
luamethod(LuaSettings, get_bool),
luamethod(LuaSettings, set),
luamethod(LuaSettings, remove),
luamethod(LuaSettings, get_names),
luamethod(LuaSettings, write),
luamethod(LuaSettings, to_table),
{0,0}
};
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