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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.
*/

#pragma once

#include "common/c_content.h"
#include "lua_api/l_base.h"

class Settings;

class LuaSettings : public ModApiBase
{
private:
	static const char className[];
	static const luaL_Reg methods[];

	// garbage collector
	static int gc_object(lua_State *L);

	// get(self, key) -> value
	static int l_get(lua_State *L);

	// get_bool(self, key) -> boolean
	static int l_get_bool(lua_State *L);

	// get_np_group(self, key) -> noiseparam
	static int l_get_np_group(lua_State *L);

	// set(self, key, value)
	static int l_set(lua_State *L);

	// set_bool(self, key, value)
	static int l_set_bool(lua_State *L);

	// set_np_group(self, key, value)
	static int l_set_np_group(lua_State *L);

	// remove(self, key) -> success
	static int l_remove(lua_State *L);

	// get_names(self) -> {key1, ...}
	static int l_get_names(lua_State *L);

	// write(self) -> success
	static int l_write(lua_State *L);

	// to_table(self) -> {[key1]=value1,...}
	static int l_to_table(lua_State *L);

	Settings *m_settings = nullptr;
	std::string m_filename;
	bool m_is_own_settings = false;
	bool m_write_allowed = true;

public:
	LuaSettings(Settings *settings, const std::string &filename);
	LuaSettings(const std::string &filename, bool write_allowed);
	~LuaSettings();

	static void create(lua_State *L, Settings *settings, const std::string &filename);

	// LuaSettings(filename)
	// Creates a LuaSettings and leaves it on top of the stack
	static int create_object(lua_State *L);

	static LuaSettings *checkobject(lua_State *L, int narg);

	static void Register(lua_State *L);
};
1' href='#n311'>311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565
/*
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 "lua_api/l_settings.h"
#include "common/c_converter.h"
#include "common/c_content.h"
#include "cpp_api/s_async.h"
#include "serialization.h"
#include <json/json.h>
#include "cpp_api/s_security.h"
#include "porting.h"
#include "convert_json.h"
#include "debug.h"
#include "log.h"
#include "tool.h"
#include "filesys.h"
#include "settings.h"
#include "util/auth.h"
#include "util/base64.h"
#include "config.h"
#include "version.h"
#include "util/hex.h"
#include "util/sha1.h"
#include <algorithm>


// log([level,] text)
// Writes a line to the logger.
// The one-argument version logs to infostream.
// The two-argument version accepts a log level.
// Either the special case "deprecated" for deprecation notices, or any specified in
// Logger::stringToLevel(name).
int ModApiUtil::l_log(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	std::string text;
	LogLevel level = LL_NONE;
	if (lua_isnone(L, 2)) {
		text = luaL_checkstring(L, 1);
	} else {
		std::string name = luaL_checkstring(L, 1);
		text = luaL_checkstring(L, 2);
		if (name == "deprecated") {
			log_deprecated(L, text);
			return 0;
		}
		level = Logger::stringToLevel(name);
		if (level == LL_MAX) {
			warningstream << "Tried to log at unknown level '" << name
				<< "'.  Defaulting to \"none\"." << std::endl;
			level = LL_NONE;
		}
	}
	g_logger.log(level, text);
	return 0;
}

// get_us_time()
int ModApiUtil::l_get_us_time(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	lua_pushnumber(L, porting::getTimeUs());
	return 1;
}

// 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;

	{
		std::istringstream stream(jsonstr);

		Json::CharReaderBuilder builder;
		builder.settings_["collectComments"] = false;
		std::string errs;

		if (!Json::parseFromStream(builder, stream, &root, &errs)) {
			errorstream << "Failed to parse json data " << errs << std::endl;
			size_t jlen = strlen(jsonstr);
			if (jlen > 100) {
				errorstream << "Data (" << jlen
					<< " bytes) printed to warningstream." << std::endl;
				warningstream << "data: \"" << jsonstr << "\"" << std::endl;
			} else {
				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
int ModApiUtil::l_write_json(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;

	bool styled = false;
	if (!lua_isnone(L, 2)) {
		styled = readParam<bool>(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;
	}

	std::string out;
	if (styled) {
		out = root.toStyledString();
	} else {
		out = fastWriteJson(root);
	}
	lua_pushlstring(L, out.c_str(), out.size());
	return 1;
}

// get_dig_params(groups, tool_capabilities)
int ModApiUtil::l_get_dig_params(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	ItemGroupList groups;
	read_groups(L, 1, groups);
	ToolCapabilities tp = read_tool_capabilities(L, 2);
	push_dig_params(L, getDigParams(groups, &tp));
	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::unordered_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, readParam<float>(L, 3)));
	return 1;
}

// check_password_entry(name, entry, password)
int ModApiUtil::l_check_password_entry(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	std::string name = luaL_checkstring(L, 1);
	std::string entry = luaL_checkstring(L, 2);
	std::string password = luaL_checkstring(L, 3);

	if (base64_is_valid(entry)) {
		std::string hash = translate_password(name, password);
		lua_pushboolean(L, hash == entry);
		return 1;
	}

	std::string salt;
	std::string verifier;

	if (!decode_srp_verifier_and_salt(entry, &verifier, &salt)) {
		// invalid format
		warningstream << "Invalid password format for " << name << std::endl;
		lua_pushboolean(L, false);
		return 1;
	}
	std::string gen_verifier = generate_srp_verifier(name, password, salt);

	lua_pushboolean(L, gen_verifier == verifier);
	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 = translate_password(name, raw_password);
	lua_pushstring(L, hash.c_str());
	return 1;
}

// is_yes(arg)
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 = readParam<std::string>(L, -1); // get result
	lua_pop(L, 1);

	bool yes = is_yes(str);
	lua_pushboolean(L, yes);
	return 1;
}

// is_nan(arg)
int ModApiUtil::l_is_nan(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;

	lua_pushboolean(L, isNaN(L, 1));
	return 1;
}

// get_builtin_path()
int ModApiUtil::l_get_builtin_path(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;

	std::string path = porting::path_share + DIR_DELIM + "builtin" + DIR_DELIM;
	lua_pushstring(L, path.c_str());

	return 1;
}

// compress(data, method, level)
int ModApiUtil::l_compress(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;

	size_t size;
	const char *data = luaL_checklstring(L, 1, &size);

	int level = -1;
	if (!lua_isnone(L, 3) && !lua_isnil(L, 3))
		level = readParam<float>(L, 3);

	std::ostringstream os;
	compressZlib(std::string(data, size), os, level);

	std::string out = os.str();

	lua_pushlstring(L, out.data(), out.size());
	return 1;
}

// decompress(data, method)
int ModApiUtil::l_decompress(lua_State *L)