minetest/src/script/lua_api/l_util.cpp

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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.
*/
#include "lua_api/l_util.h"
#include "lua_api/l_internal.h"
#include "common/c_converter.h"
#include "common/c_content.h"
#include "lua_api/l_async_events.h"
#include "debug.h"
#include "log.h"
#include "tool.h"
#include "settings.h"
#include "main.h" //required for g_settings, g_settings_path
#include "json/json.h"
// debug(...)
// Writes a line to dstream
int ModApiUtil::l_debug(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
// Handle multiple parameters to behave like standard lua print()
int n = lua_gettop(L);
lua_getglobal(L, "tostring");
for (int i = 1; i <= n; i++) {
/*
Call tostring(i-th argument).
This is what print() does, and it behaves a bit
differently from directly calling lua_tostring.
*/
lua_pushvalue(L, -1); /* function to be called */
lua_pushvalue(L, i); /* value to print */
lua_call(L, 1, 1);
const char *s = lua_tostring(L, -1);
if (i>1)
dstream << "\t";
if (s)
dstream << s;
lua_pop(L, 1);
}
dstream << std::endl;
return 0;
}
// log([level,] text)
// Writes a line to the logger.
// The one-argument version logs to infostream.
// The two-argument version accept a log level: error, action, info, or verbose.
int ModApiUtil::l_log(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
std::string text;
LogMessageLevel level = LMT_INFO;
if (lua_isnone(L, 2)) {
text = lua_tostring(L, 1);
}
else {
std::string levelname = luaL_checkstring(L, 1);
text = luaL_checkstring(L, 2);
if(levelname == "error")
level = LMT_ERROR;
else if(levelname == "action")
level = LMT_ACTION;
else if(levelname == "verbose")
level = LMT_VERBOSE;
}
log_printline(level, text);
return 0;
}
// setting_set(name, value)
int ModApiUtil::l_setting_set(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
const char *name = luaL_checkstring(L, 1);
const char *value = luaL_checkstring(L, 2);
g_settings->set(name, value);
return 0;
}
// setting_get(name)
int ModApiUtil::l_setting_get(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
const char *name = luaL_checkstring(L, 1);
try{
std::string value = g_settings->get(name);
lua_pushstring(L, value.c_str());
} catch(SettingNotFoundException &e){
lua_pushnil(L);
}
return 1;
}
// setting_setbool(name)
int ModApiUtil::l_setting_setbool(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
const char *name = luaL_checkstring(L, 1);
bool value = lua_toboolean(L, 2);
g_settings->setBool(name, value);
return 0;
}
// setting_getbool(name)
int ModApiUtil::l_setting_getbool(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
const char *name = luaL_checkstring(L, 1);
try{
bool value = g_settings->getBool(name);
lua_pushboolean(L, value);
} catch(SettingNotFoundException &e){
lua_pushnil(L);
}
return 1;
}
// setting_save()
int ModApiUtil::l_setting_save(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
if(g_settings_path != "")
g_settings->updateConfigFile(g_settings_path.c_str());
return 0;
}
// parse_json(str[, nullvalue])
int ModApiUtil::l_parse_json(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
const char *jsonstr = luaL_checkstring(L, 1);
// Use passed nullvalue or default to nil
int nullindex = 2;
if (lua_isnone(L, nullindex)) {
lua_pushnil(L);
nullindex = lua_gettop(L);
}
Json::Value root;
{
Json::Reader reader;
std::istringstream stream(jsonstr);
if (!reader.parse(stream, root)) {
errorstream << "Failed to parse json data "
<< reader.getFormattedErrorMessages();
errorstream << "data: \"" << jsonstr << "\""
<< std::endl;
lua_pushnil(L);
return 1;
}
}
if (!push_json_value(L, root, nullindex)) {
errorstream << "Failed to parse json data, "
<< "depth exceeds lua stack limit" << std::endl;
errorstream << "data: \"" << jsonstr << "\"" << std::endl;
lua_pushnil(L);
}
return 1;
}
// write_json(data[, styled]) -> string or nil and error message
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int ModApiUtil::l_write_json(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
bool styled = false;
if (!lua_isnone(L, 2)) {
styled = lua_toboolean(L, 2);
lua_pop(L, 1);
}
Json::Value root;
try {
read_json_value(L, root, 1);
} catch (SerializationError &e) {
lua_pushnil(L);
lua_pushstring(L, e.what());
return 2;
}
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std::string out;
if (styled) {
Json::StyledWriter writer;
out = writer.write(root);
} else {
Json::FastWriter writer;
out = writer.write(root);
}
lua_pushlstring(L, out.c_str(), out.size());
return 1;
}
// get_dig_params(groups, tool_capabilities[, time_from_last_punch])
int ModApiUtil::l_get_dig_params(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
std::map<std::string, int> groups;
read_groups(L, 1, groups);
ToolCapabilities tp = read_tool_capabilities(L, 2);
if(lua_isnoneornil(L, 3))
push_dig_params(L, getDigParams(groups, &tp));
else
push_dig_params(L, getDigParams(groups, &tp,
luaL_checknumber(L, 3)));
return 1;
}
// get_hit_params(groups, tool_capabilities[, time_from_last_punch])
int ModApiUtil::l_get_hit_params(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
std::map<std::string, int> groups;
read_groups(L, 1, groups);
ToolCapabilities tp = read_tool_capabilities(L, 2);
if(lua_isnoneornil(L, 3))
push_hit_params(L, getHitParams(groups, &tp));
else
push_hit_params(L, getHitParams(groups, &tp,
luaL_checknumber(L, 3)));
return 1;
}
// get_password_hash(name, raw_password)
int ModApiUtil::l_get_password_hash(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
std::string name = luaL_checkstring(L, 1);
std::string raw_password = luaL_checkstring(L, 2);
std::string hash = translatePassword(name,
narrow_to_wide(raw_password));
lua_pushstring(L, hash.c_str());
return 1;
}
// is_yes(arg)
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int ModApiUtil::l_is_yes(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
lua_getglobal(L, "tostring"); // function to be called
lua_pushvalue(L, 1); // 1st argument
lua_call(L, 1, 1); // execute function
std::string str(lua_tostring(L, -1)); // get result
lua_pop(L, 1);
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bool yes = is_yes(str);
lua_pushboolean(L, yes);
return 1;
}
void ModApiUtil::Initialize(lua_State *L, int top)
{
API_FCT(debug);
API_FCT(log);
API_FCT(setting_set);
API_FCT(setting_get);
API_FCT(setting_setbool);
API_FCT(setting_getbool);
API_FCT(setting_save);
API_FCT(parse_json);
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API_FCT(write_json);
API_FCT(get_dig_params);
API_FCT(get_hit_params);
API_FCT(get_password_hash);
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API_FCT(is_yes);
}
void ModApiUtil::InitializeAsync(AsyncEngine& engine)
{
ASYNC_API_FCT(debug);
ASYNC_API_FCT(log);
//ASYNC_API_FCT(setting_set);
ASYNC_API_FCT(setting_get);
//ASYNC_API_FCT(setting_setbool);
ASYNC_API_FCT(setting_getbool);
//ASYNC_API_FCT(setting_save);
ASYNC_API_FCT(parse_json);
ASYNC_API_FCT(is_yes);
}