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, float min_nearness);
  45         void flush();
  46
  47         void addAction(const RollbackAction &action);
  48         std::list<RollbackAction> getEntriesSince(time_t first_time);
  49         std::list<RollbackAction> getNodeActors(
  50                         v3s16 pos, int range, time_t seconds, int limit);
  51         std::list<RollbackAction> getRevertActions(
  52                         const std::string &actor_filter, time_t seconds);
  53
  54 private:
  55         void registerNewActor(const int id, const std::string &name);
  56         void registerNewNode(const int id, const std::string &name);
  57         int getActorId(const std::string &name);
  58         int getNodeId(const std::string &name);
  59         const char *getActorName(const int id);
  60         const char *getNodeName(const int id);
  61         bool createTables();
  62         bool initDatabase();
  63         bool registerRow(const ActionRow &row);
  64         const std::list<ActionRow> actionRowsFromSelect(sqlite3_stmt *stmt);
  65         ActionRow actionRowFromRollbackAction(const RollbackAction &action);
  66         const std::list<RollbackAction> rollbackActionsFromActionRows(
  67                         const std::list<ActionRow> &rows);
  68         const std::list<ActionRow> getRowsSince(
  69                         time_t firstTime, const std::string &actor);
  70         const std::list<ActionRow> getRowsSince_range(
  71                         time_t firstTime, v3s16 p, int range, int limit);
  72         const std::list<RollbackAction> getActionsSince_range(
  73                         time_t firstTime, v3s16 p, int range, int limit);
  74         const std::list<RollbackAction> getActionsSince(
  75                         time_t firstTime, const std::string &actor = "");
  76         void migrate(const std::string &filepath);
  77         static float getSuspectNearness(bool is_guess, v3s16 suspect_p, time_t suspect_t,
  78                         v3s16 action_p, time_t action_t);
  79
  80         IGameDef *gamedef = nullptr;
  81
  82         std::string current_actor;
  83         bool current_actor_is_guess = false;
  84
  85         std::list<RollbackAction> action_todisk_buffer;
  86         std::list<RollbackAction> action_latest_buffer;
  87
  88         std::string database_path;
  89         sqlite3 *db;
  90         sqlite3_stmt *stmt_insert;
  91         sqlite3_stmt *stmt_replace;
  92         sqlite3_stmt *stmt_select;
  93         sqlite3_stmt *stmt_select_range;
  94         sqlite3_stmt *stmt_select_withActor;
  95         sqlite3_stmt *stmt_knownActor_select;
  96         sqlite3_stmt *stmt_knownActor_insert;
  97         sqlite3_stmt *stmt_knownNode_select;
  98         sqlite3_stmt *stmt_knownNode_insert;
  99
 100         std::vector<Entity> knownActors;
 101         std::vector<Entity> knownNodes;
 102 };