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Private nodemeta (#5702)
* Private node metadata that isn't sent to the client
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6945f807ab
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@ -2895,6 +2895,10 @@ Can be obtained via `minetest.get_meta(pos)`.
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#### Methods
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* All methods in MetaDataRef
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* `get_inventory()`: returns `InvRef`
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* `mark_as_private(name or {name1, name2, ...})`: Mark specific vars as private
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This will prevent them from being sent to the client. Note that the "private"
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status will only be remembered if an associated key-value pair exists, meaning
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it's best to call this when initializing all other meta (e.g. on_construct).
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### `ItemStackMetaRef`
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ItemStack metadata: reference extra data and functionality stored in a stack.
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@ -1228,6 +1228,8 @@ minetest.register_node("default:chest_locked", {
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meta:set_string("owner", "")
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local inv = meta:get_inventory()
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inv:set_size("main", 8*4)
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-- this is not really the intended usage but works for testing purposes:
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meta:mark_as_private("owner")
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end,
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can_dig = function(pos,player)
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local meta = minetest.get_meta(pos);
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@ -502,10 +502,16 @@ minetest.register_craftitem("experimental:tester_tool_1", {
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on_use = function(itemstack, user, pointed_thing)
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--print(dump(pointed_thing))
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if pointed_thing.type == "node" then
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if minetest.get_node(pointed_thing.under).name == "experimental:tester_node_1" then
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local node = minetest.get_node(pointed_thing.under)
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if node.name == "experimental:tester_node_1" or node.name == "default:chest" then
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local p = pointed_thing.under
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minetest.log("action", "Tester tool used at "..minetest.pos_to_string(p))
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minetest.dig_node(p)
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if node.name == "experimental:tester_node_1" then
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minetest.dig_node(p)
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else
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minetest.get_meta(p):mark_as_private({"infotext", "formspec"})
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minetest.chat_send_player(user:get_player_name(), "Verify that chest is unusable now.")
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end
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else
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local p = pointed_thing.above
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minetest.log("action", "Tester tool used at "..minetest.pos_to_string(p))
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@ -611,7 +611,7 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
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Node metadata
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*/
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std::ostringstream oss(std::ios_base::binary);
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m_node_metadata.serialize(oss);
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m_node_metadata.serialize(oss, version, disk);
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compressZlib(oss.str(), os);
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/*
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@ -669,11 +669,10 @@ void MapBlock::deSerialize(std::istream &is, u8 version, bool disk)
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u8 flags = readU8(is);
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is_underground = (flags & 0x01) ? true : false;
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m_day_night_differs = (flags & 0x02) ? true : false;
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if (version < 27) {
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if (version < 27)
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m_lighting_complete = 0xFFFF;
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} else {
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else
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m_lighting_complete = readU16(is);
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}
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m_generated = (flags & 0x08) ? false : true;
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/*
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@ -23,6 +23,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "inventory.h"
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#include "log.h"
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#include "util/serialize.h"
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#include "util/basic_macros.h"
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#include "constants.h" // MAP_BLOCKSIZE
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#include <sstream>
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@ -39,28 +40,38 @@ NodeMetadata::~NodeMetadata()
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delete m_inventory;
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}
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void NodeMetadata::serialize(std::ostream &os) const
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void NodeMetadata::serialize(std::ostream &os, u8 version, bool disk) const
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{
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int num_vars = m_stringvars.size();
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int num_vars = disk ? m_stringvars.size() : countNonPrivate();
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writeU32(os, num_vars);
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for (StringMap::const_iterator
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it = m_stringvars.begin();
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it != m_stringvars.end(); ++it) {
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bool priv = isPrivate(it->first);
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if (!disk && priv)
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continue;
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os << serializeString(it->first);
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os << serializeLongString(it->second);
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if (version >= 2)
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writeU8(os, (priv) ? 1 : 0);
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}
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m_inventory->serialize(os);
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}
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void NodeMetadata::deSerialize(std::istream &is)
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void NodeMetadata::deSerialize(std::istream &is, u8 version)
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{
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m_stringvars.clear();
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clear();
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int num_vars = readU32(is);
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for(int i=0; i<num_vars; i++){
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std::string name = deSerializeString(is);
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std::string var = deSerializeLongString(is);
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m_stringvars[name] = var;
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if (version >= 2) {
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if (readU8(is) == 1)
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markPrivate(name, true);
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}
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}
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m_inventory->deSerialize(is);
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@ -69,6 +80,7 @@ void NodeMetadata::deSerialize(std::istream &is)
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void NodeMetadata::clear()
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{
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Metadata::clear();
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m_privatevars.clear();
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m_inventory->clear();
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}
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@ -77,11 +89,34 @@ bool NodeMetadata::empty() const
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return Metadata::empty() && m_inventory->getLists().size() == 0;
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}
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void NodeMetadata::markPrivate(const std::string &name, bool set)
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{
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if (set)
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m_privatevars.insert(name);
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else
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m_privatevars.erase(name);
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}
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int NodeMetadata::countNonPrivate() const
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{
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// m_privatevars can contain names not actually present
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// DON'T: return m_stringvars.size() - m_privatevars.size();
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int n = 0;
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for (StringMap::const_iterator
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it = m_stringvars.begin();
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it != m_stringvars.end(); ++it) {
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if (isPrivate(it->first) == false)
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n++;
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}
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return n;
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}
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/*
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NodeMetadataList
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*/
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void NodeMetadataList::serialize(std::ostream &os) const
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void NodeMetadataList::serialize(std::ostream &os, u8 blockver, bool disk) const
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{
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/*
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Version 0 is a placeholder for "nothing to see here; go away."
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@ -93,7 +128,8 @@ void NodeMetadataList::serialize(std::ostream &os) const
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return;
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}
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writeU8(os, 1); // version
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u8 version = (blockver > 27) ? 2 : 1;
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writeU8(os, version);
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writeU16(os, count);
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for(std::map<v3s16, NodeMetadata*>::const_iterator
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@ -108,7 +144,7 @@ void NodeMetadataList::serialize(std::ostream &os) const
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u16 p16 = p.Z * MAP_BLOCKSIZE * MAP_BLOCKSIZE + p.Y * MAP_BLOCKSIZE + p.X;
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writeU16(os, p16);
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data->serialize(os);
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data->serialize(os, version, disk);
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}
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}
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@ -123,7 +159,7 @@ void NodeMetadataList::deSerialize(std::istream &is, IItemDefManager *item_def_m
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return;
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}
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if (version != 1) {
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if (version > 2) {
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std::string err_str = std::string(FUNCTION_NAME)
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+ ": version " + itos(version) + " not supported";
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infostream << err_str << std::endl;
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@ -132,7 +168,7 @@ void NodeMetadataList::deSerialize(std::istream &is, IItemDefManager *item_def_m
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u16 count = readU16(is);
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for (u16 i=0; i < count; i++) {
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for (u16 i = 0; i < count; i++) {
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u16 p16 = readU16(is);
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v3s16 p;
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@ -143,15 +179,14 @@ void NodeMetadataList::deSerialize(std::istream &is, IItemDefManager *item_def_m
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p.X = p16;
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if (m_data.find(p) != m_data.end()) {
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warningstream<<"NodeMetadataList::deSerialize(): "
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<<"already set data at position"
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<<"("<<p.X<<","<<p.Y<<","<<p.Z<<"): Ignoring."
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<<std::endl;
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warningstream << "NodeMetadataList::deSerialize(): "
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<< "already set data at position " << PP(p)
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<< ": Ignoring." << std::endl;
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continue;
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}
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NodeMetadata *data = new NodeMetadata(item_def_mgr);
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data->deSerialize(is);
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data->deSerialize(is, version);
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m_data[p] = data;
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}
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}
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@ -21,6 +21,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#define NODEMETADATA_HEADER
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#include "metadata.h"
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#include "util/cpp11_container.h"
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/*
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NodeMetadata stores arbitary amounts of data for special blocks.
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@ -40,8 +41,8 @@ public:
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NodeMetadata(IItemDefManager *item_def_mgr);
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~NodeMetadata();
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void serialize(std::ostream &os) const;
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void deSerialize(std::istream &is);
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void serialize(std::ostream &os, u8 version, bool disk=true) const;
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void deSerialize(std::istream &is, u8 version);
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void clear();
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bool empty() const;
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@ -52,8 +53,17 @@ public:
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return m_inventory;
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}
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inline bool isPrivate(const std::string &name) const
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{
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return m_privatevars.count(name) != 0;
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}
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void markPrivate(const std::string &name, bool set);
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private:
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int countNonPrivate() const;
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Inventory *m_inventory;
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UNORDERED_SET<std::string> m_privatevars;
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};
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@ -66,7 +76,7 @@ class NodeMetadataList
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public:
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~NodeMetadataList();
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void serialize(std::ostream &os) const;
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void serialize(std::ostream &os, u8 blockver, bool disk=true) const;
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void deSerialize(std::istream &is, IItemDefManager *item_def_mgr);
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// Add all keys in this list to the vector keys
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@ -44,7 +44,7 @@ RollbackNode::RollbackNode(Map *map, v3s16 p, IGameDef *gamedef)
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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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metap->serialize(os, 1); // FIXME: version bump??
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meta = os.str();
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}
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}
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@ -165,7 +165,7 @@ bool RollbackAction::applyRevert(Map *map, InventoryManager *imgr, IGameDef *gam
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}
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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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meta->deSerialize(is, 1); // FIXME: version bump??
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}
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// Inform other things that the meta data has changed
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v3s16 blockpos = getContainerPos(p, MAP_BLOCKSIZE);
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@ -94,6 +94,32 @@ int NodeMetaRef::l_get_inventory(lua_State *L)
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return 1;
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}
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// mark_as_private(self, <string> or {<string>, <string>, ...})
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int NodeMetaRef::l_mark_as_private(lua_State *L)
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{
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MAP_LOCK_REQUIRED;
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NodeMetaRef *ref = checkobject(L, 1);
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NodeMetadata *meta = dynamic_cast<NodeMetadata*>(ref->getmeta(true));
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assert(meta);
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if (lua_istable(L, 2)) {
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lua_pushnil(L);
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while (lua_next(L, 2) != 0) {
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// key at index -2 and value at index -1
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luaL_checktype(L, -1, LUA_TSTRING);
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meta->markPrivate(lua_tostring(L, -1), true);
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// removes value, keeps key for next iteration
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lua_pop(L, 1);
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}
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} else if (lua_isstring(L, 2)) {
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meta->markPrivate(lua_tostring(L, 2), true);
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}
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ref->reportMetadataChange();
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return 0;
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}
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void NodeMetaRef::handleToTable(lua_State *L, Metadata *_meta)
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{
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// fields
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@ -229,6 +255,7 @@ const luaL_Reg NodeMetaRef::methodsServer[] = {
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luamethod(MetaDataRef, to_table),
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luamethod(MetaDataRef, from_table),
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luamethod(NodeMetaRef, get_inventory),
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luamethod(NodeMetaRef, mark_as_private),
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luamethod(MetaDataRef, equals),
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{0,0}
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};
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@ -73,6 +73,9 @@ private:
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// get_inventory(self)
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static int l_get_inventory(lua_State *L);
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// mark_as_private(self, <string> or {<string>, <string>, ...})
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static int l_mark_as_private(lua_State *L);
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public:
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NodeMetaRef(v3s16 p, ServerEnvironment *env);
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NodeMetaRef(Metadata *meta);
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@ -63,13 +63,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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25: Improved node timer format
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26: Never written; read the same as 25
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27: Added light spreading flags to blocks
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28: Added "private" flag to NodeMetadata
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*/
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// This represents an uninitialized or invalid format
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#define SER_FMT_VER_INVALID 255
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// Highest supported serialization version
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#define SER_FMT_VER_HIGHEST_READ 27
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#define SER_FMT_VER_HIGHEST_READ 28
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// Saved on disk version
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#define SER_FMT_VER_HIGHEST_WRITE 27
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#define SER_FMT_VER_HIGHEST_WRITE 28
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// Lowest supported serialization version
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#define SER_FMT_VER_LOWEST_READ 0
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// Lowest serialization version for writing
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