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;
}
// 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;
}
if (n_old.meta.empty()) {
map->removeNodeMetadata(p);
} else {
NodeMetadata *meta = map->getNodeMetadata(p);
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);
}
// Inform other things that the meta data 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,
MOD_REASON_REPORT_META_CHANGE);
}
} 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);
std::string real_name = gamedef->idef()->getAlias(inventory_stack.name);
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 != real_name)
return false;
list->takeItem(inventory_index, inventory_stack.count);
} else {
list->addItem(inventory_index, inventory_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;
}
