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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 "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;
- }
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