mirror of https://github.com/minetest/minetest.git
417 lines
12 KiB
C++
417 lines
12 KiB
C++
/*
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Minetest-c55
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Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "rollback_interface.h"
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#include <sstream>
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#include "util/serialize.h"
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#include "util/string.h"
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#include "util/numeric.h"
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#include "map.h"
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#include "gamedef.h"
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#include "nodedef.h"
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#include "nodemetadata.h"
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#include "exceptions.h"
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#include "log.h"
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#include "inventorymanager.h"
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#include "inventory.h"
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#include "mapblock.h"
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#define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
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RollbackNode::RollbackNode(Map *map, v3s16 p, IGameDef *gamedef)
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{
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INodeDefManager *ndef = gamedef->ndef();
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MapNode n = map->getNodeNoEx(p);
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name = ndef->get(n).name;
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param1 = n.param1;
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param2 = n.param2;
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NodeMetadata *metap = map->getNodeMetadata(p);
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if(metap){
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std::ostringstream os(std::ios::binary);
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metap->serialize(os);
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meta = os.str();
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}
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}
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std::string RollbackAction::toString() const
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{
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switch(type){
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case TYPE_SET_NODE: {
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std::ostringstream os(std::ios::binary);
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os<<"[set_node";
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os<<" ";
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os<<"("<<itos(p.X)<<","<<itos(p.Y)<<","<<itos(p.Z)<<")";
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os<<" ";
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os<<serializeJsonString(n_old.name);
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os<<" ";
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os<<itos(n_old.param1);
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os<<" ";
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os<<itos(n_old.param2);
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os<<" ";
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os<<serializeJsonString(n_old.meta);
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os<<" ";
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os<<serializeJsonString(n_new.name);
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os<<" ";
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os<<itos(n_new.param1);
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os<<" ";
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os<<itos(n_new.param2);
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os<<" ";
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os<<serializeJsonString(n_new.meta);
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os<<"]";
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return os.str(); }
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case TYPE_MODIFY_INVENTORY_STACK: {
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std::ostringstream os(std::ios::binary);
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os<<"[modify_inventory_stack";
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os<<" ";
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os<<serializeJsonString(inventory_location);
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os<<" ";
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os<<serializeJsonString(inventory_list);
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os<<" ";
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os<<inventory_index;
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os<<" ";
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os<<(inventory_add?"add":"remove");
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os<<" ";
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os<<serializeJsonString(inventory_stack);
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os<<"]";
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return os.str(); }
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default:
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return "none";
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}
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}
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void RollbackAction::fromStream(std::istream &is) throw(SerializationError)
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{
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int c = is.get();
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if(c != '['){
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is.putback(c);
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throw SerializationError("RollbackAction: starting [ not found");
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}
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std::string id;
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std::getline(is, id, ' ');
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if(id == "set_node")
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{
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c = is.get();
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if(c != '('){
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is.putback(c);
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throw SerializationError("RollbackAction: starting ( not found");
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}
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// Position
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std::string px_raw;
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std::string py_raw;
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std::string pz_raw;
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std::getline(is, px_raw, ',');
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std::getline(is, py_raw, ',');
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std::getline(is, pz_raw, ')');
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c = is.get();
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if(c != ' '){
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is.putback(c);
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throw SerializationError("RollbackAction: after-p ' ' not found");
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}
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v3s16 loaded_p(stoi(px_raw), stoi(py_raw), stoi(pz_raw));
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// Old node
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std::string old_name;
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try{
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old_name = deSerializeJsonString(is);
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}catch(SerializationError &e){
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errorstream<<"Serialization error in RollbackAction::fromStream(): "
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<<"old_name: "<<e.what()<<std::endl;
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throw e;
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}
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c = is.get();
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if(c != ' '){
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is.putback(c);
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throw SerializationError("RollbackAction: after-old_name ' ' not found");
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}
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std::string old_p1_raw;
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std::string old_p2_raw;
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std::getline(is, old_p1_raw, ' ');
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std::getline(is, old_p2_raw, ' ');
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int old_p1 = stoi(old_p1_raw);
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int old_p2 = stoi(old_p2_raw);
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std::string old_meta;
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try{
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old_meta = deSerializeJsonString(is);
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}catch(SerializationError &e){
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errorstream<<"Serialization error in RollbackAction::fromStream(): "
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<<"old_meta: "<<e.what()<<std::endl;
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throw e;
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}
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c = is.get();
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if(c != ' '){
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is.putback(c);
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throw SerializationError("RollbackAction: after-old_meta ' ' not found");
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}
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// New node
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std::string new_name;
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try{
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new_name = deSerializeJsonString(is);
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}catch(SerializationError &e){
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errorstream<<"Serialization error in RollbackAction::fromStream(): "
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<<"new_name: "<<e.what()<<std::endl;
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throw e;
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}
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c = is.get();
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if(c != ' '){
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is.putback(c);
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throw SerializationError("RollbackAction: after-new_name ' ' not found");
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}
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std::string new_p1_raw;
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std::string new_p2_raw;
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std::getline(is, new_p1_raw, ' ');
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std::getline(is, new_p2_raw, ' ');
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int new_p1 = stoi(new_p1_raw);
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int new_p2 = stoi(new_p2_raw);
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std::string new_meta;
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try{
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new_meta = deSerializeJsonString(is);
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}catch(SerializationError &e){
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errorstream<<"Serialization error in RollbackAction::fromStream(): "
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<<"new_meta: "<<e.what()<<std::endl;
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throw e;
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}
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c = is.get();
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if(c != ']'){
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is.putback(c);
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throw SerializationError("RollbackAction: after-new_meta ] not found");
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}
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// Set values
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type = TYPE_SET_NODE;
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p = loaded_p;
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n_old.name = old_name;
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n_old.param1 = old_p1;
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n_old.param2 = old_p2;
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n_old.meta = old_meta;
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n_new.name = new_name;
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n_new.param1 = new_p1;
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n_new.param2 = new_p2;
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n_new.meta = new_meta;
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}
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else if(id == "modify_inventory_stack")
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{
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// Location
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std::string location;
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try{
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location = deSerializeJsonString(is);
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}catch(SerializationError &e){
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errorstream<<"Serialization error in RollbackAction::fromStream(): "
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<<"location: "<<e.what()<<std::endl;
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throw e;
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}
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c = is.get();
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if(c != ' '){
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is.putback(c);
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throw SerializationError("RollbackAction: after-loc ' ' not found");
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}
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// List
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std::string listname;
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try{
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listname = deSerializeJsonString(is);
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}catch(SerializationError &e){
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errorstream<<"Serialization error in RollbackAction::fromStream(): "
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<<"listname: "<<e.what()<<std::endl;
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throw e;
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}
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c = is.get();
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if(c != ' '){
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is.putback(c);
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throw SerializationError("RollbackAction: after-list ' ' not found");
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}
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// Index
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std::string index_raw;
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std::getline(is, index_raw, ' ');
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// add/remove
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std::string addremove;
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std::getline(is, addremove, ' ');
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if(addremove != "add" && addremove != "remove"){
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throw SerializationError("RollbackAction: addremove is not add or remove");
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}
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// Itemstring
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std::string stack;
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try{
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stack = deSerializeJsonString(is);
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}catch(SerializationError &e){
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errorstream<<"Serialization error in RollbackAction::fromStream(): "
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<<"stack: "<<e.what()<<std::endl;
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throw e;
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}
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// Set values
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type = TYPE_MODIFY_INVENTORY_STACK;
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inventory_location = location;
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inventory_list = listname;
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inventory_index = stoi(index_raw);
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inventory_add = (addremove == "add");
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inventory_stack = stack;
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}
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else
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{
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throw SerializationError("RollbackAction: Unknown id");
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}
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}
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bool RollbackAction::isImportant(IGameDef *gamedef) const
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{
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switch(type){
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case TYPE_SET_NODE: {
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// If names differ, action is always important
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if(n_old.name != n_new.name)
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return true;
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// If metadata differs, action is always important
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if(n_old.meta != n_new.meta)
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return true;
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INodeDefManager *ndef = gamedef->ndef();
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// Both are of the same name, so a single definition is needed
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const ContentFeatures &def = ndef->get(n_old.name);
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// If the type is flowing liquid, action is not important
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if(def.liquid_type == LIQUID_FLOWING)
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return false;
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// Otherwise action is important
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return true; }
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default:
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return true;
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}
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}
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bool RollbackAction::getPosition(v3s16 *dst) const
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{
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switch(type){
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case RollbackAction::TYPE_SET_NODE:
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if(dst) *dst = p;
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return true;
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case RollbackAction::TYPE_MODIFY_INVENTORY_STACK: {
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InventoryLocation loc;
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loc.deSerialize(inventory_location);
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if(loc.type != InventoryLocation::NODEMETA)
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return false;
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if(dst) *dst = loc.p;
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return true; }
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default:
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return false;
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}
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}
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bool RollbackAction::applyRevert(Map *map, InventoryManager *imgr, IGameDef *gamedef) const
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{
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try{
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switch(type){
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case TYPE_NOTHING:
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return true;
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case TYPE_SET_NODE: {
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INodeDefManager *ndef = gamedef->ndef();
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// Make sure position is loaded from disk
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map->emergeBlock(getContainerPos(p, MAP_BLOCKSIZE), false);
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// Check current node
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MapNode current_node = map->getNodeNoEx(p);
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std::string current_name = ndef->get(current_node).name;
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// If current node not the new node, it's bad
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if(current_name != n_new.name)
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return false;
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/*// If current node not the new node and not ignore, it's bad
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if(current_name != n_new.name && current_name != "ignore")
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return false;*/
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// Create rollback node
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MapNode n(ndef, n_old.name, n_old.param1, n_old.param2);
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// Set rollback node
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try{
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if(!map->addNodeWithEvent(p, n)){
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infostream<<"RollbackAction::applyRevert(): "
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<<"AddNodeWithEvent failed at "
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<<PP(p)<<" for "<<n_old.name<<std::endl;
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return false;
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}
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NodeMetadata *meta = map->getNodeMetadata(p);
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if(n_old.meta != ""){
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if(!meta){
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meta = new NodeMetadata(gamedef);
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map->setNodeMetadata(p, meta);
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}
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std::istringstream is(n_old.meta, std::ios::binary);
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meta->deSerialize(is);
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} else {
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map->removeNodeMetadata(p);
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}
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// NOTE: This same code is in scriptapi.cpp
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// Inform other things that the metadata has changed
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v3s16 blockpos = getContainerPos(p, MAP_BLOCKSIZE);
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MapEditEvent event;
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event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
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event.p = blockpos;
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map->dispatchEvent(&event);
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// Set the block to be saved
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MapBlock *block = map->getBlockNoCreateNoEx(blockpos);
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if(block)
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block->raiseModified(MOD_STATE_WRITE_NEEDED,
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"NodeMetaRef::reportMetadataChange");
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}catch(InvalidPositionException &e){
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infostream<<"RollbackAction::applyRevert(): "
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<<"InvalidPositionException: "<<e.what()<<std::endl;
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return false;
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}
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// Success
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return true; }
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case TYPE_MODIFY_INVENTORY_STACK: {
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InventoryLocation loc;
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loc.deSerialize(inventory_location);
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ItemStack stack;
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stack.deSerialize(inventory_stack, gamedef->idef());
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Inventory *inv = imgr->getInventory(loc);
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if(!inv){
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infostream<<"RollbackAction::applyRevert(): Could not get "
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"inventory at "<<inventory_location<<std::endl;
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return false;
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}
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InventoryList *list = inv->getList(inventory_list);
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if(!list){
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infostream<<"RollbackAction::applyRevert(): Could not get "
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"inventory list \""<<inventory_list<<"\" in "
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<<inventory_location<<std::endl;
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return false;
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}
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if(list->getSize() <= inventory_index){
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infostream<<"RollbackAction::applyRevert(): List index "
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<<inventory_index<<" too large in "
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<<"inventory list \""<<inventory_list<<"\" in "
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<<inventory_location<<std::endl;
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}
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// If item was added, take away item, otherwise add removed item
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if(inventory_add){
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// Silently ignore different current item
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if(list->getItem(inventory_index).name != stack.name)
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return false;
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list->takeItem(inventory_index, stack.count);
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} else {
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list->addItem(inventory_index, stack);
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}
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// Inventory was modified; send to clients
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imgr->setInventoryModified(loc);
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return true; }
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default:
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errorstream<<"RollbackAction::applyRevert(): type not handled"
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<<std::endl;
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return false;
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}
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}catch(SerializationError &e){
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errorstream<<"RollbackAction::applyRevert(): n_old.name="<<n_old.name
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<<", SerializationError: "<<e.what()<<std::endl;
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}
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return false;
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}
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