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path: root/cmake/Modules/FindNcursesw.cmake

	Commit message (Collapse)	Author	Age
*	Add server side ncurses terminal	est31	2015-11-06
	This adds a chat console the server owner can use for administration or to talk with players. It runs in its own thread, which makes the user interface immune to the server's lag, behaving just like a client, except timeout. As it uses the same console code as the f10 console, things like nick completion or a scroll buffer basically come for free. The terminal itself is written in a general way so that adding a client version later on is just about implementing an interface. Fatal errors are printed after the console exists and the ncurses terminal buffer gets cleaned up with endwin(), so that the error still remains visible. The server owner can chose their username their entered text will have in chat and where players can send PMs to. Once the username is secured with a password to prevent anybody to take over the server, the owner can execute admin tasks over the console. This change includes a contribution by @kahrl who has improved ncurses library detection.

generated by cgit v1.2.3 (git 2.39.1) at 2025-01-13 14:13:25 +0000

/*
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 "rollback_interface.h"
#include <sstream>
#include "util/serialize.h"
#include "util/string.h"
#include "util/numeric.h"
#include "map.h"
#include "gamedef.h"
#include "nodedef.h"
#include "nodemetadata.h"
#include "exceptions.h"
#include "log.h"
#include "inventorymanager.h"
#include "inventory.h"
#include "mapblock.h"

#define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"

RollbackNode::RollbackNode(Map *map, v3s16 p, IGameDef *gamedef)
{
	INodeDefManager *ndef = gamedef->ndef();
	MapNode n = map->getNodeNoEx(p);
	name = ndef->get(n).name;
	param1 = n.param1;
	param2 = n.param2;
	NodeMetadata *metap = map->getNodeMetadata(p);
	if(metap){
		std::ostringstream os(std::ios::binary);
		metap->serialize(os);
		meta = os.str();
	}
}

std::string RollbackAction::toString() const
{
	switch(type){
	case TYPE_SET_NODE: {
		std::ostringstream os(std::ios::binary);
		os<<"[set_node";
		os<<" ";
		os<<"("<<itos(p.X)<<","<<itos(p.Y)<<","<<itos(p.Z)<<")";
		os<<" ";
		os<<serializeJsonString(n_old.name);
		os<<" ";
		os<<itos(n_old.param1);
		os<<" ";
		os<<itos(n_old.param2);
		os<<" ";
		os<<serializeJsonString(n_old.meta);
		os<<" ";
		os<<serializeJsonString(n_new.name);
		os<<" ";
		os<<itos(n_new.param1);
		os<<" ";
		os<<itos(n_new.param2);
		os<<" ";
		os<<serializeJsonString(n_new.meta);
		os<<"]";
		return os.str(); }
	case TYPE_MODIFY_INVENTORY_STACK: {
		std::ostringstream os(std::ios::binary);
		os<<"[modify_inventory_stack";
		os<<" ";
		os<<serializeJsonString(inventory_location);
		os<<" ";
		os<<serializeJsonString(inventory_list);
		os<<" ";
		os<<inventory_index;
		os<<" ";
		os<<(inventory_add?"add":"remove");
		os<<" ";
		os<<serializeJsonString(inventory_stack);
		os<<"]";
		return os.str(); }
	default:
		return "none";
	}
}

void RollbackAction::fromStream(std::istream &is) throw(SerializationError)
{
	int c = is.get();
	if(c != '['){
		is.putback(c);
		throw SerializationError("RollbackAction: starting [ not found");
	}
	
	std::string id;
	std::getline(is, id, ' ');
	
	if(id == "set_node")
	{
		c = is.get();
		if(c != '('){
			is.putback(c);
			throw SerializationError("RollbackAction: starting ( not found");
		}
		// Position
		std::string px_raw;
		std::string py_raw;
		std::string pz_raw;
		std::getline(is, px_raw, ',');
		std::getline(is, py_raw, ',');
		std::getline(is, pz_raw, ')');
		c = is.get();
		if(c != ' '){
			is.putback(c);
			throw SerializationError("RollbackAction: after-p ' ' not found");
		}
		v3s16 loaded_p(stoi(px_raw), stoi(py_raw), stoi(pz_raw));
		// Old node
		std::string old_name;
		try{
			old_name = deSerializeJsonString(is);
		}catch(SerializationError &e){
			errorstream<<"Serialization error in RollbackAction::fromStream(): "
					<<"old_name: "<<e.what()<<std::endl;
			throw e;
		}
		c = is.get();
		if(c != ' '){
			is.putback(c);
			throw SerializationError("RollbackAction: after-old_name ' ' not found");
		}
		std::string old_p1_raw;
		std::string old_p2_raw;
		std::getline(is, old_p1_raw, ' ');
		std::getline(is, old_p2_raw, ' ');
		int old_p1 = stoi(old_p1_raw);
		int old_p2 = stoi(old_p2_raw);
		std::string old_meta;
		try{
			old_meta = deSerializeJsonString(is);
		}catch(SerializationError &e){
			errorstream<<"Serialization error in RollbackAction::fromStream(): "
					<<"old_meta: "<<e.what()<<std::endl;
			throw e;
		}
		c = is.get();
		if(c != ' '){
			is.putback(c);
			throw SerializationError("RollbackAction: after-old_meta ' ' not found");
		}
		// New node
		std::string new_name;
		try{
			new_name = deSerializeJsonString(is);
		}catch(SerializationError &e){
			errorstream<<"Serialization error in RollbackAction::fromStream(): "
					<<"new_name: "<<e.what()<<std::endl;
			throw e;
		}
		c = is.get();
		if(c != ' '){
			is.putback(c);
			throw SerializationError("RollbackAction: after-new_name ' ' not found");
		}
		std::string new_p1_raw;
		std::string new_p2_raw;
		std::getline(is, new_p1_raw, ' ');
		std::getline(is, new_p2_raw, ' ');
		int new_p1 = stoi(new_p1_raw);
		int new_p2 = stoi(new_p2_raw);
		std::string new_meta;
		try{
			new_meta = deSerializeJsonString(is);
		}catch(SerializationError &e){
			errorstream<<"Serialization error in RollbackAction::fromStream(): "
					<<"new_meta: "<<e.what()<<std::endl;
			throw e;
		}
		c = is.get();
		if(c != ']'){
			is.putback(c);
			throw SerializationError("RollbackAction: after-new_meta ] not found");
		}
		// Set values
		type = TYPE_SET_NODE;
		p = loaded_p;
		n_old.name = old_name;
		n_old.param1 = old_p1;
		n_old.param2 = old_p2;
		n_old.meta = old_meta;
		n_new.name = new_name;
		n_new.param1 = new_p1;
		n_new.param2 = new_p2;
		n_new.meta = new_meta;
	}
	else if(id == "modify_inventory_stack")
	{
		// Location
		std::string location;
		try{
			location = deSerializeJsonString(is);
		}catch(SerializationError &e){
			errorstream<<"Serialization error in RollbackAction::fromStream(): "
					<<"location: "<<e.what()<<std::endl;
			throw e;
		}
		c = is.get();
		if(c != ' '){
			is.putback(c);
			throw SerializationError("RollbackAction: after-loc ' ' not found");
		}
		// List
		std::string listname;
		try{
			listname = deSerializeJsonString(is);
		}catch(SerializationError &e){
			errorstream<<"Serialization error in RollbackAction::fromStream(): "
					<<"listname: "<<e.what()<<std::endl;
			throw e;
		}
		c = is.get();
		if(c != ' '){
			is.putback(c);
			throw SerializationError("RollbackAction: after-list ' ' not found");
		}
		// Index
		std::string index_raw;
		std::getline(is, index_raw, ' ');
		// add/remove
		std::string addremove;
		std::getline(is, addremove, ' ');
		if(addremove != "add" && addremove != "remove"){
			throw SerializationError("RollbackAction: addremove is not add or remove");
		}
		// Itemstring
		std::string stack;
		try{
			stack = deSerializeJsonString(is);
		}catch(SerializationError &e){
			errorstream<<"Serialization error in RollbackAction::fromStream(): "
					<<"stack: "<<e.what()<<std::endl;
			throw e;
		}
		// Set values
		type = TYPE_MODIFY_INVENTORY_STACK;
		inventory_location = location;
		inventory_list = listname;
		inventory_index = stoi(index_raw);
		inventory_add = (addremove == "add");
		inventory_stack = stack;
	}
	else
	{
		throw SerializationError("RollbackAction: Unknown id");
	}
}

bool RollbackAction::isImportant(IGameDef *gamedef) const
{
	switch(type){
	case TYPE_SET_NODE: {
		// If names differ, action is always important
		if(n_old.name != n_new.name)
			return true;
		// If metadata differs, action is always important
		if(n_old.meta != n_new.meta)
			return true;
		INodeDefManager *ndef = gamedef->ndef();
		// Both are of the same name, so a single definition is needed
		const ContentFeatures &def = ndef->get(n_old.name);
		// If the type is flowing liquid, action is not important
		if(def.liquid_type == LIQUID_FLOWING)
			return false;
		// Otherwise action is important
		return true; }
	default:
		return true;
	}
}

bool RollbackAction::getPosition(v3s16 *dst) const
{
	switch(type){
	case RollbackAction::TYPE_SET_NODE:
		if(dst) *dst = p;
		return true;
	case RollbackAction::TYPE_MODIFY_INVENTORY_STACK: {
		InventoryLocation loc;
		loc.deSerialize(inventory_location);
		if(loc.type != InventoryLocation::NODEMETA)
			return false;
		if(dst) *dst = loc.p;
		return true; }
	default:
		return false;
	}
}

bool RollbackAction::applyRevert(Map *map, InventoryManager *imgr, IGameDef *gamedef) const
{
	try{
		switch(type){
		case TYPE_NOTHING:
			return true;
		case TYPE_SET_NODE: {
			INodeDefManager *ndef = gamedef->ndef();
			// Make sure position is loaded from disk
			map->emergeBlock(getContainerPos(p, MAP_BLOCKSIZE), false);
			// Check current node
			MapNode current_node = map->getNodeNoEx(p);
			std::string current_name = ndef->get(current_node).name;
			// If current node not the new node, it's bad
			if(current_name != n_new.name)
				return false;
			/*// If current node not the new node and not ignore, it's bad
			if(current_name != n_new.name && current_name != "ignore")
				return false;*/
			// Create rollback node
			MapNode n(ndef, n_old.name, n_old.param1, n_old.param2);
			// Set rollback node
			try{
				if(!map->addNodeWithEvent(p, n)){
					infostream<<"RollbackAction::applyRevert(): "
							<<"AddNodeWithEvent failed at "
							<<PP(p)<<" for "<<n_old.name<<std::endl;
					return false;
				}
				NodeMetadata *meta = map->getNodeMetadata(p);
				if(n_old.meta != ""){
					if(!meta){
						meta = new NodeMetadata(gamedef);
						if(!map->setNodeMetadata(p, meta)){
							delete meta;
							infostream<<"RollbackAction::applyRevert(): "
									<<"setNodeMetadata failed at "
									<<PP(p)<<" for "<<n_old.name<<std::endl;
							return false;
						}
					}
					std::istringstream is(n_old.meta, std::ios::binary);
					meta->deSerialize(is);
				} else {
					map->removeNodeMetadata(p);
				}
				// NOTE: This same code is in scriptapi.cpp
				// Inform other things that the metadata has changed
				v3s16 blockpos = getContainerPos(p, MAP_BLOCKSIZE);
				MapEditEvent event;
				event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
				event.p = blockpos;
				map->dispatchEvent(&event);
				// Set the block to be saved
				MapBlock *block = map->getBlockNoCreateNoEx(blockpos);
				if(block)
					block->raiseModified(MOD_STATE_WRITE_NEEDED,
							"NodeMetaRef::reportMetadataChange");
			}catch(InvalidPositionException &e){
				infostream<<"RollbackAction::applyRevert(): "
						<<"InvalidPositionException: "<<e.what()<<std::endl;
				return false;
			}
			// Success
			return true; }
		case TYPE_MODIFY_INVENTORY_STACK: {
			InventoryLocation loc;
			loc.deSerialize(inventory_location);
			ItemStack stack;
			stack.deSerialize(inventory_stack, gamedef->idef());
			Inventory *inv = imgr->getInventory(loc);
			if(!inv){
				infostream<<"RollbackAction::applyRevert(): Could not get "
						"inventory at "<<inventory_location<<std::endl;
				return false;
			}
			InventoryList *list = inv->getList(inventory_list);
			if(!list){
				infostream<<"RollbackAction::applyRevert(): Could not get "
						"inventory list \""<<inventory_list<<"\" in "
						<<inventory_location<<std::endl;
				return false;
			}
			if(list->getSize() <= inventory_index){
				infostream<<"RollbackAction::applyRevert(): List index "
						<<inventory_index<<" too large in "
						<<"inventory list \""<<inventory_list<<"\" in "
						<<inventory_location<<std::endl;
			}
			// If item was added, take away item, otherwise add removed item
			if(inventory_add){
				// Silently ignore different current item
				if(list->getItem(inventory_index).name != stack.name)
					return false;
				list->takeItem(inventory_index, stack.count);
			} else {
				list->addItem(inventory_index, stack);
			}
			// Inventory was modified; send to clients
			imgr->setInventoryModified(loc);
			return true; }
		default:
			errorstream<<"RollbackAction::applyRevert(): type not handled"
					<<std::endl;
			return false;
		}
	}catch(SerializationError &e){
		errorstream<<"RollbackAction::applyRevert(): n_old.name="<<n_old.name
				<<", SerializationError: "<<e.what()<<std::endl;
	}
	return false;
}