src/rollback.h

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #pragma once
  21
  22 #include <string>
  23 #include "irr_v3d.h"
  24 #include "rollback_interface.h"
  25 #include <list>
  26 #include <vector>
  27 #include "sqlite3.h"
  28
  29 class IGameDef;
  30
  31 struct ActionRow;
  32 struct Entity;
  33
  34 class RollbackManager: public IRollbackManager
  35 {
  36 public:
  37         RollbackManager(const std::string & world_path, IGameDef * gamedef);
  38         ~RollbackManager();
  39
  40         void reportAction(const RollbackAction & action_);
  41         std::string getActor();
  42         bool isActorGuess();
  43         void setActor(const std::string & actor, bool is_guess);
  44         std::string getSuspect(v3s16 p, float nearness_shortcut,
  45                         float min_nearness);
  46         void flush();
  47
  48         void addAction(const RollbackAction & action);
  49         std::list<RollbackAction> getEntriesSince(time_t first_time);
  50         std::list<RollbackAction> getNodeActors(v3s16 pos, int range,
  51                         time_t seconds, int limit);
  52         std::list<RollbackAction> getRevertActions(
  53                         const std::string & actor_filter, time_t seconds);
  54
  55 private:
  56         void registerNewActor(const int id, const std::string & name);
  57         void registerNewNode(const int id, const std::string & name);
  58         int getActorId(const std::string & name);
  59         int getNodeId(const std::string & name);
  60         const char * getActorName(const int id);
  61         const char * getNodeName(const int id);
  62         bool createTables();
  63         bool initDatabase();
  64         bool registerRow(const ActionRow & row);
  65         const std::list<ActionRow> actionRowsFromSelect(sqlite3_stmt * stmt);
  66         ActionRow actionRowFromRollbackAction(const RollbackAction & action);
  67         const std::list<RollbackAction> rollbackActionsFromActionRows(
  68                         const std::list<ActionRow> & rows);
  69         const std::list<ActionRow> getRowsSince(time_t firstTime,
  70                         const std::string & actor);
  71         const std::list<ActionRow> getRowsSince_range(time_t firstTime, v3s16 p,
  72                         int range, int limit);
  73         const std::list<RollbackAction> getActionsSince_range(time_t firstTime, v3s16 p,
  74                         int range, int limit);
  75         const std::list<RollbackAction> getActionsSince(time_t firstTime,
  76                         const std::string & actor = "");
  77         void migrate(const std::string & filepath);
  78         static float getSuspectNearness(bool is_guess, v3s16 suspect_p,
  79                 time_t suspect_t, v3s16 action_p, time_t action_t);
  80
  81
  82         IGameDef *gamedef = nullptr;
  83
  84         std::string current_actor;
  85         bool current_actor_is_guess = false;
  86
  87         std::list<RollbackAction> action_todisk_buffer;
  88         std::list<RollbackAction> action_latest_buffer;
  89
  90         std::string database_path;
  91         sqlite3 * db;
  92         sqlite3_stmt * stmt_insert;
  93         sqlite3_stmt * stmt_replace;
  94         sqlite3_stmt * stmt_select;
  95         sqlite3_stmt * stmt_select_range;
  96         sqlite3_stmt * stmt_select_withActor;
  97         sqlite3_stmt * stmt_knownActor_select;
  98         sqlite3_stmt * stmt_knownActor_insert;
  99         sqlite3_stmt * stmt_knownNode_select;
 100         sqlite3_stmt * stmt_knownNode_insert;
 101
 102         std::vector<Entity> knownActors;
 103         std::vector<Entity> knownNodes;
 104 };