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Implement player attribute backend (#4155)

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* This backend permit mods to store extra players attributes to a common interface.
* Add the obj:set_attribute(attr, value) Lua call
* Add the obj:get_attribute(attr) Lua call

Examples:
* player:set_attribute("home:home", "10,25,-78")
* player:get_attribute("default:mana")

Attributes are saved as a json in the player file in extended_attributes
key

They are saved only if a modification on the attributes occurs and loaded
when emergePlayer is called (they are attached to PlayerSAO).
This commit is contained in:
Loïc Blot 2017-01-27 08:59:30 +01:00 • committed by GitHub
parent 2a89531071
commit b7a98e9850
9 changed files with 128 additions and 6 deletions
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38
src/remoteplayer.cpp
View file

@ -19,13 +19,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
*/
#include "remoteplayer.h"
#include <json/json.h>
#include "content_sao.h"
#include "filesys.h"
#include "gamedef.h"
#include "porting.h" // strlcpy
#include "server.h"
#include "settings.h"
/*
RemotePlayer
*/
@ -112,9 +113,23 @@ void RemotePlayer::save(std::string savedir, IGameDef *gamedef)
}
infostream << "Didn't find free file for player " << m_name << std::endl;
return;
}
void RemotePlayer::serializeExtraAttributes(std::string &output)
{
assert(m_sao);
Json::Value json_root;
const PlayerAttributes &attrs = m_sao->getExtendedAttributes();
for (PlayerAttributes::const_iterator it = attrs.begin(); it != attrs.end(); ++it) {
json_root[(*it).first] = (*it).second;
}
Json::FastWriter writer;
output = writer.write(json_root);
m_sao->setExtendedAttributeModified(false);
}
void RemotePlayer::deSerialize(std::istream &is, const std::string &playername,
PlayerSAO *sao)
{
@ -150,6 +165,20 @@ void RemotePlayer::deSerialize(std::istream &is, const std::string &playername,
try {
sao->setBreath(args.getS32("breath"), false);
} catch (SettingNotFoundException &e) {}
try {
std::string extended_attributes = args.get("extended_attributes");
Json::Reader reader;
Json::Value attr_root;
reader.parse(extended_attributes, attr_root);
const Json::Value::Members attr_list = attr_root.getMemberNames();
for (Json::Value::Members::const_iterator it = attr_list.begin();
it != attr_list.end(); ++it) {
Json::Value attr_value = attr_root[*it];
sao->setExtendedAttribute(*it, attr_value.asString());
}
} catch (SettingNotFoundException &e) {}
}
inventory.deSerialize(is);
@ -175,7 +204,6 @@ void RemotePlayer::serialize(std::ostream &os)
Settings args;
args.setS32("version", 1);
args.set("name", m_name);
//args.set("password", m_password);
// This should not happen
assert(m_sao);
@ -185,6 +213,10 @@ void RemotePlayer::serialize(std::ostream &os)
args.setFloat("yaw", m_sao->getYaw());
args.setS32("breath", m_sao->getBreath());
std::string extended_attrs = "";
serializeExtraAttributes(extended_attrs);
args.set("extended_attributes", extended_attrs);
args.writeLines(os);
os<<"PlayerArgsEnd\n";