src/remoteplayer.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2016 celeron55, Perttu Ahola <celeron55@gmail.com>
   4 Copyright (C) 2014-2016 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include "remoteplayer.h"
  22 #include <json/json.h>
  23 #include "content_sao.h"
  24 #include "filesys.h"
  25 #include "gamedef.h"
  26 #include "porting.h"  // strlcpy
  27 #include "server.h"
  28 #include "settings.h"
  29 #include "convert_json.h"
  30
  31 /*
  32         RemotePlayer
  33 */
  34 // static config cache for remoteplayer
  35 bool RemotePlayer::m_setting_cache_loaded = false;
  36 float RemotePlayer::m_setting_chat_message_limit_per_10sec = 0.0f;
  37 u16 RemotePlayer::m_setting_chat_message_limit_trigger_kick = 0;
  38
  39 RemotePlayer::RemotePlayer(const char *name, IItemDefManager *idef):
  40         Player(name, idef)
  41 {
  42         if (!RemotePlayer::m_setting_cache_loaded) {
  43                 RemotePlayer::m_setting_chat_message_limit_per_10sec =
  44                         g_settings->getFloat("chat_message_limit_per_10sec");
  45                 RemotePlayer::m_setting_chat_message_limit_trigger_kick =
  46                         g_settings->getU16("chat_message_limit_trigger_kick");
  47                 RemotePlayer::m_setting_cache_loaded = true;
  48         }
  49         movement_acceleration_default   = g_settings->getFloat("movement_acceleration_default")   * BS;
  50         movement_acceleration_air       = g_settings->getFloat("movement_acceleration_air")       * BS;
  51         movement_acceleration_fast      = g_settings->getFloat("movement_acceleration_fast")      * BS;
  52         movement_speed_walk             = g_settings->getFloat("movement_speed_walk")             * BS;
  53         movement_speed_crouch           = g_settings->getFloat("movement_speed_crouch")           * BS;
  54         movement_speed_fast             = g_settings->getFloat("movement_speed_fast")             * BS;
  55         movement_speed_climb            = g_settings->getFloat("movement_speed_climb")            * BS;
  56         movement_speed_jump             = g_settings->getFloat("movement_speed_jump")             * BS;
  57         movement_liquid_fluidity        = g_settings->getFloat("movement_liquid_fluidity")        * BS;
  58         movement_liquid_fluidity_smooth = g_settings->getFloat("movement_liquid_fluidity_smooth") * BS;
  59         movement_liquid_sink            = g_settings->getFloat("movement_liquid_sink")            * BS;
  60         movement_gravity                = g_settings->getFloat("movement_gravity")                * BS;
  61
  62         // copy defaults
  63         m_cloud_params.density = 0.4f;
  64         m_cloud_params.color_bright = video::SColor(229, 240, 240, 255);
  65         m_cloud_params.color_ambient = video::SColor(255, 0, 0, 0);
  66         m_cloud_params.height = 120.0f;
  67         m_cloud_params.thickness = 16.0f;
  68         m_cloud_params.speed = v2f(0.0f, -2.0f);
  69 }
  70
  71 void RemotePlayer::serializeExtraAttributes(std::string &output)
  72 {
  73         assert(m_sao);
  74         Json::Value json_root;
  75
  76         const StringMap &attrs = m_sao->getMeta().getStrings();
  77         for (const auto &attr : attrs) {
  78                 json_root[attr.first] = attr.second;
  79         }
  80
  81         output = fastWriteJson(json_root);
  82 }
  83
  84
  85 void RemotePlayer::deSerialize(std::istream &is, const std::string &playername,
  86                 PlayerSAO *sao)
  87 {
  88         Settings args;
  89
  90         if (!args.parseConfigLines(is, "PlayerArgsEnd")) {
  91                 throw SerializationError("PlayerArgsEnd of player " + playername + " not found!");
  92         }
  93
  94         m_dirty = true;
  95         //args.getS32("version"); // Version field value not used
  96         const std::string &name = args.get("name");
  97         strlcpy(m_name, name.c_str(), PLAYERNAME_SIZE);
  98
  99         if (sao) {
 100                 try {
 101                         sao->setHPRaw(args.getU16("hp"));
 102                 } catch(SettingNotFoundException &e) {
 103                         sao->setHPRaw(PLAYER_MAX_HP_DEFAULT);
 104                 }
 105
 106                 try {
 107                         sao->setBasePosition(args.getV3F("position"));
 108                 } catch (SettingNotFoundException &e) {}
 109
 110                 try {
 111                         sao->setLookPitch(args.getFloat("pitch"));
 112                 } catch (SettingNotFoundException &e) {}
 113                 try {
 114                         sao->setPlayerYaw(args.getFloat("yaw"));
 115                 } catch (SettingNotFoundException &e) {}
 116
 117                 try {
 118                         sao->setBreath(args.getU16("breath"), false);
 119                 } catch (SettingNotFoundException &e) {}
 120
 121                 try {
 122                         const std::string &extended_attributes = args.get("extended_attributes");
 123                         std::istringstream iss(extended_attributes);
 124                         Json::CharReaderBuilder builder;
 125                         builder.settings_["collectComments"] = false;
 126                         std::string errs;
 127
 128                         Json::Value attr_root;
 129                         Json::parseFromStream(builder, iss, &attr_root, &errs);
 130
 131                         const Json::Value::Members attr_list = attr_root.getMemberNames();
 132                         for (const auto &it : attr_list) {
 133                                 Json::Value attr_value = attr_root[it];
 134                                 sao->getMeta().setString(it, attr_value.asString());
 135                         }
 136                         sao->getMeta().setModified(false);
 137                 } catch (SettingNotFoundException &e) {}
 138         }
 139
 140         try {
 141                 inventory.deSerialize(is);
 142         } catch (SerializationError &e) {
 143                 errorstream << "Failed to deserialize player inventory. player_name="
 144                         << name << " " << e.what() << std::endl;
 145         }
 146
 147         if (!inventory.getList("craftpreview") && inventory.getList("craftresult")) {
 148                 // Convert players without craftpreview
 149                 inventory.addList("craftpreview", 1);
 150
 151                 bool craftresult_is_preview = true;
 152                 if(args.exists("craftresult_is_preview"))
 153                         craftresult_is_preview = args.getBool("craftresult_is_preview");
 154                 if(craftresult_is_preview)
 155                 {
 156                         // Clear craftresult
 157                         inventory.getList("craftresult")->changeItem(0, ItemStack());
 158                 }
 159         }
 160 }
 161
 162 void RemotePlayer::serialize(std::ostream &os)
 163 {
 164         // Utilize a Settings object for storing values
 165         Settings args;
 166         args.setS32("version", 1);
 167         args.set("name", m_name);
 168
 169         // This should not happen
 170         assert(m_sao);
 171         args.setU16("hp", m_sao->getHP());
 172         args.setV3F("position", m_sao->getBasePosition());
 173         args.setFloat("pitch", m_sao->getLookPitch());
 174         args.setFloat("yaw", m_sao->getRotation().Y);
 175         args.setU16("breath", m_sao->getBreath());
 176
 177         std::string extended_attrs;
 178         serializeExtraAttributes(extended_attrs);
 179         args.set("extended_attributes", extended_attrs);
 180
 181         args.writeLines(os);
 182
 183         os<<"PlayerArgsEnd\n";
 184
 185         inventory.serialize(os);
 186 }
 187
 188 const RemotePlayerChatResult RemotePlayer::canSendChatMessage()
 189 {
 190         // Rate limit messages
 191         u32 now = time(NULL);
 192         float time_passed = now - m_last_chat_message_sent;
 193         m_last_chat_message_sent = now;
 194
 195         // If this feature is disabled
 196         if (m_setting_chat_message_limit_per_10sec <= 0.0) {
 197                 return RPLAYER_CHATRESULT_OK;
 198         }
 199
 200         m_chat_message_allowance += time_passed * (m_setting_chat_message_limit_per_10sec / 8.0f);
 201         if (m_chat_message_allowance > m_setting_chat_message_limit_per_10sec) {
 202                 m_chat_message_allowance = m_setting_chat_message_limit_per_10sec;
 203         }
 204
 205         if (m_chat_message_allowance < 1.0f) {
 206                 infostream << "Player " << m_name
 207                                 << " chat limited due to excessive message amount." << std::endl;
 208
 209                 // Kick player if flooding is too intensive
 210                 m_message_rate_overhead++;
 211                 if (m_message_rate_overhead > RemotePlayer::m_setting_chat_message_limit_trigger_kick) {
 212                         return RPLAYER_CHATRESULT_KICK;
 213                 }
 214
 215                 return RPLAYER_CHATRESULT_FLOODING;
 216         }
 217
 218         // Reinit message overhead
 219         if (m_message_rate_overhead > 0) {
 220                 m_message_rate_overhead = 0;
 221         }
 222
 223         m_chat_message_allowance -= 1.0f;
 224         return RPLAYER_CHATRESULT_OK;
 225 }
 226
 227 void RemotePlayer::onSuccessfulSave()
 228 {
 229         setModified(false);
 230         if (m_sao)
 231                 m_sao->getMeta().setModified(false);
 232 }