src/rollback.cpp

   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 #include "rollback.h"
  21 #include <fstream>
  22 #include <list>
  23 #include <sstream>
  24 #include "log.h"
  25 #include "mapnode.h"
  26 #include "gamedef.h"
  27 #include "nodedef.h"
  28 #include "util/serialize.h"
  29 #include "util/string.h"
  30 #include "util/numeric.h"
  31 #include "inventorymanager.h" // deserializing InventoryLocations
  32 #include "sqlite3.h"
  33 #include "filesys.h"
  34
  35 #define POINTS_PER_NODE (16.0)
  36
  37 #define SQLRES(f, good) \
  38         if ((f) != (good)) {\
  39                 throw FileNotGoodException(std::string("RollbackManager: " \
  40                         "SQLite3 error (" __FILE__ ":" TOSTRING(__LINE__) \
  41                         "): ") + sqlite3_errmsg(db)); \
  42         }
  43 #define SQLOK(f) SQLRES(f, SQLITE_OK)
  44
  45 #define SQLOK_ERRSTREAM(s, m)                             \
  46         if ((s) != SQLITE_OK) {                               \
  47                 errorstream << "RollbackManager: " << (m) << ": " \
  48                         << sqlite3_errmsg(db) << std::endl;           \
  49         }
  50
  51 #define FINALIZE_STATEMENT(statement) \
  52         SQLOK_ERRSTREAM(sqlite3_finalize(statement), "Failed to finalize " #statement)
  53
  54 class ItemStackRow : public ItemStack {
  55 public:
  56         ItemStackRow & operator = (const ItemStack & other)
  57         {
  58                 *static_cast<ItemStack *>(this) = other;
  59                 return *this;
  60         }
  61
  62         int id;
  63 };
  64
  65 struct ActionRow {
  66         int          id;
  67         int          actor;
  68         time_t       timestamp;
  69         int          type;
  70         std::string  location, list;
  71         int          index, add;
  72         ItemStackRow stack;
  73         int          nodeMeta;
  74         int          x, y, z;
  75         int          oldNode;
  76         int          oldParam1, oldParam2;
  77         std::string  oldMeta;
  78         int          newNode;
  79         int          newParam1, newParam2;
  80         std::string  newMeta;
  81         int          guessed;
  82 };
  83
  84
  85 struct Entity {
  86         int         id;
  87         std::string name;
  88 };
  89
  90
  91
  92 RollbackManager::RollbackManager(const std::string & world_path,
  93                 IGameDef * gamedef_) :
  94         gamedef(gamedef_)
  95 {
  96         verbosestream << "RollbackManager::RollbackManager(" << world_path
  97                 << ")" << std::endl;
  98
  99         database_path = world_path + DIR_DELIM "rollback.sqlite";
 100
 101         initDatabase();
 102 }
 103
 104
 105 RollbackManager::~RollbackManager()
 106 {
 107         flush();
 108
 109         FINALIZE_STATEMENT(stmt_insert);
 110         FINALIZE_STATEMENT(stmt_replace);
 111         FINALIZE_STATEMENT(stmt_select);
 112         FINALIZE_STATEMENT(stmt_select_range);
 113         FINALIZE_STATEMENT(stmt_select_withActor);
 114         FINALIZE_STATEMENT(stmt_knownActor_select);
 115         FINALIZE_STATEMENT(stmt_knownActor_insert);
 116         FINALIZE_STATEMENT(stmt_knownNode_select);
 117         FINALIZE_STATEMENT(stmt_knownNode_insert);
 118
 119         SQLOK_ERRSTREAM(sqlite3_close(db), "Could not close db");
 120 }
 121
 122
 123 void RollbackManager::registerNewActor(const int id, const std::string &name)
 124 {
 125         Entity actor = {id, name};
 126         knownActors.push_back(actor);
 127 }
 128
 129
 130 void RollbackManager::registerNewNode(const int id, const std::string &name)
 131 {
 132         Entity node = {id, name};
 133         knownNodes.push_back(node);
 134 }
 135
 136
 137 int RollbackManager::getActorId(const std::string &name)
 138 {
 139         for (std::vector<Entity>::const_iterator iter = knownActors.begin();
 140                         iter != knownActors.end(); ++iter) {
 141                 if (iter->name == name) {
 142                         return iter->id;
 143                 }
 144         }
 145
 146         SQLOK(sqlite3_bind_text(stmt_knownActor_insert, 1, name.c_str(), name.size(), NULL));
 147         SQLRES(sqlite3_step(stmt_knownActor_insert), SQLITE_DONE);
 148         SQLOK(sqlite3_reset(stmt_knownActor_insert));
 149
 150         int id = sqlite3_last_insert_rowid(db);
 151         registerNewActor(id, name);
 152
 153         return id;
 154 }
 155
 156
 157 int RollbackManager::getNodeId(const std::string &name)
 158 {
 159         for (std::vector<Entity>::const_iterator iter = knownNodes.begin();
 160                         iter != knownNodes.end(); ++iter) {
 161                 if (iter->name == name) {
 162                         return iter->id;
 163                 }
 164         }
 165
 166         SQLOK(sqlite3_bind_text(stmt_knownNode_insert, 1, name.c_str(), name.size(), NULL));
 167         SQLRES(sqlite3_step(stmt_knownNode_insert), SQLITE_DONE);
 168         SQLOK(sqlite3_reset(stmt_knownNode_insert));
 169
 170         int id = sqlite3_last_insert_rowid(db);
 171         registerNewNode(id, name);
 172
 173         return id;
 174 }
 175
 176
 177 const char * RollbackManager::getActorName(const int id)
 178 {
 179         for (std::vector<Entity>::const_iterator iter = knownActors.begin();
 180                         iter != knownActors.end(); ++iter) {
 181                 if (iter->id == id) {
 182                         return iter->name.c_str();
 183                 }
 184         }
 185
 186         return "";
 187 }
 188
 189
 190 const char * RollbackManager::getNodeName(const int id)
 191 {
 192         for (std::vector<Entity>::const_iterator iter = knownNodes.begin();
 193                         iter != knownNodes.end(); ++iter) {
 194                 if (iter->id == id) {
 195                         return iter->name.c_str();
 196                 }
 197         }
 198
 199         return "";
 200 }
 201
 202
 203 bool RollbackManager::createTables()
 204 {
 205         SQLOK(sqlite3_exec(db,
 206                 "CREATE TABLE IF NOT EXISTS `actor` (\n"
 207                 "       `id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,\n"
 208                 "       `name` TEXT NOT NULL\n"
 209                 ");\n"
 210                 "CREATE TABLE IF NOT EXISTS `node` (\n"
 211                 "       `id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,\n"
 212                 "       `name` TEXT NOT NULL\n"
 213                 ");\n"
 214                 "CREATE TABLE IF NOT EXISTS `action` (\n"
 215                 "       `id` INTEGER PRIMARY KEY AUTOINCREMENT,\n"
 216                 "       `actor` INTEGER NOT NULL,\n"
 217                 "       `timestamp` TIMESTAMP NOT NULL,\n"
 218                 "       `type` INTEGER NOT NULL,\n"
 219                 "       `list` TEXT,\n"
 220                 "       `index` INTEGER,\n"
 221                 "       `add` INTEGER,\n"
 222                 "       `stackNode` INTEGER,\n"
 223                 "       `stackQuantity` INTEGER,\n"
 224                 "       `nodeMeta` INTEGER,\n"
 225                 "       `x` INT,\n"
 226                 "       `y` INT,\n"
 227                 "       `z` INT,\n"
 228                 "       `oldNode` INTEGER,\n"
 229                 "       `oldParam1` INTEGER,\n"
 230                 "       `oldParam2` INTEGER,\n"
 231                 "       `oldMeta` TEXT,\n"
 232                 "       `newNode` INTEGER,\n"
 233                 "       `newParam1` INTEGER,\n"
 234                 "       `newParam2` INTEGER,\n"
 235                 "       `newMeta` TEXT,\n"
 236                 "       `guessedActor` INTEGER,\n"
 237                 "       FOREIGN KEY (`actor`) REFERENCES `actor`(`id`),\n"
 238                 "       FOREIGN KEY (`stackNode`) REFERENCES `node`(`id`),\n"
 239                 "       FOREIGN KEY (`oldNode`)   REFERENCES `node`(`id`),\n"
 240                 "       FOREIGN KEY (`newNode`)   REFERENCES `node`(`id`)\n"
 241                 ");\n"
 242                 "CREATE INDEX IF NOT EXISTS `actionIndex` ON `action`(`x`,`y`,`z`,`timestamp`,`actor`);\n",
 243                 NULL, NULL, NULL));
 244         verbosestream << "SQL Rollback: SQLite3 database structure was created" << std::endl;
 245
 246         return true;
 247 }
 248
 249
 250 bool RollbackManager::initDatabase()
 251 {
 252         verbosestream << "RollbackManager: Database connection setup" << std::endl;
 253
 254         bool needs_create = !fs::PathExists(database_path);
 255         SQLOK(sqlite3_open_v2(database_path.c_str(), &db,
 256                         SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL));
 257
 258         if (needs_create) {
 259                 createTables();
 260         }
 261
 262         SQLOK(sqlite3_prepare_v2(db,
 263                 "INSERT INTO `action` (\n"
 264                 "       `actor`, `timestamp`, `type`,\n"
 265                 "       `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodeMeta`,\n"
 266                 "       `x`, `y`, `z`,\n"
 267                 "       `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
 268                 "       `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
 269                 "       `guessedActor`\n"
 270                 ") VALUES (\n"
 271                 "       ?, ?, ?,\n"
 272                 "       ?, ?, ?, ?, ?, ?,\n"
 273                 "       ?, ?, ?,\n"
 274                 "       ?, ?, ?, ?,\n"
 275                 "       ?, ?, ?, ?,\n"
 276                 "       ?"
 277                 ");",
 278                 -1, &stmt_insert, NULL));
 279
 280         SQLOK(sqlite3_prepare_v2(db,
 281                 "REPLACE INTO `action` (\n"
 282                 "       `actor`, `timestamp`, `type`,\n"
 283                 "       `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodeMeta`,\n"
 284                 "       `x`, `y`, `z`,\n"
 285                 "       `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
 286                 "       `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
 287                 "       `guessedActor`, `id`\n"
 288                 ") VALUES (\n"
 289                 "       ?, ?, ?,\n"
 290                 "       ?, ?, ?, ?, ?, ?,\n"
 291                 "       ?, ?, ?,\n"
 292                 "       ?, ?, ?, ?,\n"
 293                 "       ?, ?, ?, ?,\n"
 294                 "       ?, ?\n"
 295                 ");",
 296                 -1, &stmt_replace, NULL));
 297
 298         SQLOK(sqlite3_prepare_v2(db,
 299                 "SELECT\n"
 300                 "       `actor`, `timestamp`, `type`,\n"
 301                 "       `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodemeta`,\n"
 302                 "       `x`, `y`, `z`,\n"
 303                 "       `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
 304                 "       `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
 305                 "       `guessedActor`\n"
 306                 " FROM `action`\n"
 307                 " WHERE `timestamp` >= ?\n"
 308                 " ORDER BY `timestamp` DESC, `id` DESC",
 309                 -1, &stmt_select, NULL));
 310
 311         SQLOK(sqlite3_prepare_v2(db,
 312                 "SELECT\n"
 313                 "       `actor`, `timestamp`, `type`,\n"
 314                 "       `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodemeta`,\n"
 315                 "       `x`, `y`, `z`,\n"
 316                 "       `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
 317                 "       `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
 318                 "       `guessedActor`\n"
 319                 "FROM `action`\n"
 320                 "WHERE `timestamp` >= ?\n"
 321                 "       AND `x` IS NOT NULL\n"
 322                 "       AND `y` IS NOT NULL\n"
 323                 "       AND `z` IS NOT NULL\n"
 324                 "       AND `x` BETWEEN ? AND ?\n"
 325                 "       AND `y` BETWEEN ? AND ?\n"
 326                 "       AND `z` BETWEEN ? AND ?\n"
 327                 "ORDER BY `timestamp` DESC, `id` DESC\n"
 328                 "LIMIT 0,?",
 329                 -1, &stmt_select_range, NULL));
 330
 331         SQLOK(sqlite3_prepare_v2(db,
 332                 "SELECT\n"
 333                 "       `actor`, `timestamp`, `type`,\n"
 334                 "       `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodemeta`,\n"
 335                 "       `x`, `y`, `z`,\n"
 336                 "       `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
 337                 "       `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
 338                 "       `guessedActor`\n"
 339                 "FROM `action`\n"
 340                 "WHERE `timestamp` >= ?\n"
 341                 "       AND `actor` = ?\n"
 342                 "ORDER BY `timestamp` DESC, `id` DESC\n",
 343                 -1, &stmt_select_withActor, NULL));
 344
 345         SQLOK(sqlite3_prepare_v2(db, "SELECT `id`, `name` FROM `actor`",
 346                         -1, &stmt_knownActor_select, NULL));
 347
 348         SQLOK(sqlite3_prepare_v2(db, "INSERT INTO `actor` (`name`) VALUES (?)",
 349                         -1, &stmt_knownActor_insert, NULL));
 350
 351         SQLOK(sqlite3_prepare_v2(db, "SELECT `id`, `name` FROM `node`",
 352                         -1, &stmt_knownNode_select, NULL));
 353
 354         SQLOK(sqlite3_prepare_v2(db, "INSERT INTO `node` (`name`) VALUES (?)",
 355                         -1, &stmt_knownNode_insert, NULL));
 356
 357         verbosestream << "SQL prepared statements setup correctly" << std::endl;
 358
 359         while (sqlite3_step(stmt_knownActor_select) == SQLITE_ROW) {
 360                 registerNewActor(
 361                         sqlite3_column_int(stmt_knownActor_select, 0),
 362                         reinterpret_cast<const char *>(sqlite3_column_text(stmt_knownActor_select, 1))
 363                 );
 364         }
 365         SQLOK(sqlite3_reset(stmt_knownActor_select));
 366
 367         while (sqlite3_step(stmt_knownNode_select) == SQLITE_ROW) {
 368                 registerNewNode(
 369                         sqlite3_column_int(stmt_knownNode_select, 0),
 370                         reinterpret_cast<const char *>(sqlite3_column_text(stmt_knownNode_select, 1))
 371                 );
 372         }
 373         SQLOK(sqlite3_reset(stmt_knownNode_select));
 374
 375         return needs_create;
 376 }
 377
 378
 379 bool RollbackManager::registerRow(const ActionRow & row)
 380 {
 381         sqlite3_stmt * stmt_do = (row.id) ? stmt_replace : stmt_insert;
 382
 383         bool nodeMeta = false;
 384
 385         SQLOK(sqlite3_bind_int  (stmt_do, 1, row.actor));
 386         SQLOK(sqlite3_bind_int64(stmt_do, 2, row.timestamp));
 387         SQLOK(sqlite3_bind_int  (stmt_do, 3, row.type));
 388
 389         if (row.type == RollbackAction::TYPE_MODIFY_INVENTORY_STACK) {
 390                 const std::string & loc = row.location;
 391                 nodeMeta = (loc.substr(0, 9) == "nodemeta:");
 392
 393                 SQLOK(sqlite3_bind_text(stmt_do, 4, row.list.c_str(), row.list.size(), NULL));
 394                 SQLOK(sqlite3_bind_int (stmt_do, 5, row.index));
 395                 SQLOK(sqlite3_bind_int (stmt_do, 6, row.add));
 396                 SQLOK(sqlite3_bind_int (stmt_do, 7, row.stack.id));
 397                 SQLOK(sqlite3_bind_int (stmt_do, 8, row.stack.count));
 398                 SQLOK(sqlite3_bind_int (stmt_do, 9, (int) nodeMeta));
 399
 400                 if (nodeMeta) {
 401                         std::string::size_type p1, p2;
 402                         p1 = loc.find(':') + 1;
 403                         p2 = loc.find(',');
 404                         std::string x = loc.substr(p1, p2 - p1);
 405                         p1 = p2 + 1;
 406                         p2 = loc.find(',', p1);
 407                         std::string y = loc.substr(p1, p2 - p1);
 408                         std::string z = loc.substr(p2 + 1);
 409                         SQLOK(sqlite3_bind_int(stmt_do, 10, atoi(x.c_str())));
 410                         SQLOK(sqlite3_bind_int(stmt_do, 11, atoi(y.c_str())));
 411                         SQLOK(sqlite3_bind_int(stmt_do, 12, atoi(z.c_str())));
 412                 }
 413         } else {
 414                 SQLOK(sqlite3_bind_null(stmt_do, 4));
 415                 SQLOK(sqlite3_bind_null(stmt_do, 5));
 416                 SQLOK(sqlite3_bind_null(stmt_do, 6));
 417                 SQLOK(sqlite3_bind_null(stmt_do, 7));
 418                 SQLOK(sqlite3_bind_null(stmt_do, 8));
 419                 SQLOK(sqlite3_bind_null(stmt_do, 9));
 420         }
 421
 422         if (row.type == RollbackAction::TYPE_SET_NODE) {
 423                 SQLOK(sqlite3_bind_int (stmt_do, 10, row.x));
 424                 SQLOK(sqlite3_bind_int (stmt_do, 11, row.y));
 425                 SQLOK(sqlite3_bind_int (stmt_do, 12, row.z));
 426                 SQLOK(sqlite3_bind_int (stmt_do, 13, row.oldNode));
 427                 SQLOK(sqlite3_bind_int (stmt_do, 14, row.oldParam1));
 428                 SQLOK(sqlite3_bind_int (stmt_do, 15, row.oldParam2));
 429                 SQLOK(sqlite3_bind_text(stmt_do, 16, row.oldMeta.c_str(), row.oldMeta.size(), NULL));
 430                 SQLOK(sqlite3_bind_int (stmt_do, 17, row.newNode));
 431                 SQLOK(sqlite3_bind_int (stmt_do, 18, row.newParam1));
 432                 SQLOK(sqlite3_bind_int (stmt_do, 19, row.newParam2));
 433                 SQLOK(sqlite3_bind_text(stmt_do, 20, row.newMeta.c_str(), row.newMeta.size(), NULL));
 434                 SQLOK(sqlite3_bind_int (stmt_do, 21, row.guessed ? 1 : 0));
 435         } else {
 436                 if (!nodeMeta) {
 437                         SQLOK(sqlite3_bind_null(stmt_do, 10));
 438                         SQLOK(sqlite3_bind_null(stmt_do, 11));
 439                         SQLOK(sqlite3_bind_null(stmt_do, 12));
 440                 }
 441                 SQLOK(sqlite3_bind_null(stmt_do, 13));
 442                 SQLOK(sqlite3_bind_null(stmt_do, 14));
 443                 SQLOK(sqlite3_bind_null(stmt_do, 15));
 444                 SQLOK(sqlite3_bind_null(stmt_do, 16));
 445                 SQLOK(sqlite3_bind_null(stmt_do, 17));
 446                 SQLOK(sqlite3_bind_null(stmt_do, 18));
 447                 SQLOK(sqlite3_bind_null(stmt_do, 19));
 448                 SQLOK(sqlite3_bind_null(stmt_do, 20));
 449                 SQLOK(sqlite3_bind_null(stmt_do, 21));
 450         }
 451
 452         if (row.id) {
 453                 SQLOK(sqlite3_bind_int(stmt_do, 22, row.id));
 454         }
 455
 456         int written = sqlite3_step(stmt_do);
 457
 458         SQLOK(sqlite3_reset(stmt_do));
 459
 460         return written == SQLITE_DONE;
 461 }
 462
 463
 464 const std::list<ActionRow> RollbackManager::actionRowsFromSelect(sqlite3_stmt* stmt)
 465 {
 466         std::list<ActionRow> rows;
 467         const unsigned char * text;
 468         size_t size;
 469
 470         while (sqlite3_step(stmt) == SQLITE_ROW) {
 471                 ActionRow row;
 472
 473                 row.actor     = sqlite3_column_int  (stmt, 0);
 474                 row.timestamp = sqlite3_column_int64(stmt, 1);
 475                 row.type      = sqlite3_column_int  (stmt, 2);
 476                 row.nodeMeta  = 0;
 477
 478                 if (row.type == RollbackAction::TYPE_MODIFY_INVENTORY_STACK) {
 479                         text = sqlite3_column_text (stmt, 3);
 480                         size = sqlite3_column_bytes(stmt, 3);
 481                         row.list        = std::string(reinterpret_cast<const char*>(text), size);
 482                         row.index       = sqlite3_column_int(stmt, 4);
 483                         row.add         = sqlite3_column_int(stmt, 5);
 484                         row.stack.id    = sqlite3_column_int(stmt, 6);
 485                         row.stack.count = sqlite3_column_int(stmt, 7);
 486                         row.nodeMeta    = sqlite3_column_int(stmt, 8);
 487                 }
 488
 489                 if (row.type == RollbackAction::TYPE_SET_NODE || row.nodeMeta) {
 490                         row.x = sqlite3_column_int(stmt,  9);
 491                         row.y = sqlite3_column_int(stmt, 10);
 492                         row.z = sqlite3_column_int(stmt, 11);
 493                 }
 494
 495                 if (row.type == RollbackAction::TYPE_SET_NODE) {
 496                         row.oldNode   = sqlite3_column_int(stmt, 12);
 497                         row.oldParam1 = sqlite3_column_int(stmt, 13);
 498                         row.oldParam2 = sqlite3_column_int(stmt, 14);
 499                         text = sqlite3_column_text (stmt, 15);
 500                         size = sqlite3_column_bytes(stmt, 15);
 501                         row.oldMeta   = std::string(reinterpret_cast<const char*>(text), size);
 502                         row.newNode   = sqlite3_column_int(stmt, 16);
 503                         row.newParam1 = sqlite3_column_int(stmt, 17);
 504                         row.newParam2 = sqlite3_column_int(stmt, 18);
 505                         text = sqlite3_column_text(stmt, 19);
 506                         size = sqlite3_column_bytes(stmt, 19);
 507                         row.newMeta   = std::string(reinterpret_cast<const char*>(text), size);
 508                         row.guessed   = sqlite3_column_int(stmt, 20);
 509                 }
 510
 511                 if (row.nodeMeta) {
 512                         row.location = "nodemeta:";
 513                         row.location += itos(row.x);
 514                         row.location += ',';
 515                         row.location += itos(row.y);
 516                         row.location += ',';
 517                         row.location += itos(row.z);
 518                 } else {
 519                         row.location = getActorName(row.actor);
 520                 }
 521
 522                 rows.push_back(row);
 523         }
 524
 525         SQLOK(sqlite3_reset(stmt));
 526
 527         return rows;
 528 }
 529
 530
 531 ActionRow RollbackManager::actionRowFromRollbackAction(const RollbackAction & action)
 532 {
 533         ActionRow row;
 534
 535         row.id        = 0;
 536         row.actor     = getActorId(action.actor);
 537         row.timestamp = action.unix_time;
 538         row.type      = action.type;
 539
 540         if (row.type == RollbackAction::TYPE_MODIFY_INVENTORY_STACK) {
 541                 row.location = action.inventory_location;
 542                 row.list     = action.inventory_list;
 543                 row.index    = action.inventory_index;
 544                 row.add      = action.inventory_add;
 545                 row.stack    = action.inventory_stack;
 546                 row.stack.id = getNodeId(row.stack.name);
 547         } else {
 548                 row.x         = action.p.X;
 549                 row.y         = action.p.Y;
 550                 row.z         = action.p.Z;
 551                 row.oldNode   = getNodeId(action.n_old.name);
 552                 row.oldParam1 = action.n_old.param1;
 553                 row.oldParam2 = action.n_old.param2;
 554                 row.oldMeta   = action.n_old.meta;
 555                 row.newNode   = getNodeId(action.n_new.name);
 556                 row.newParam1 = action.n_new.param1;
 557                 row.newParam2 = action.n_new.param2;
 558                 row.newMeta   = action.n_new.meta;
 559                 row.guessed   = action.actor_is_guess;
 560         }
 561
 562         return row;
 563 }
 564
 565
 566 const std::list<RollbackAction> RollbackManager::rollbackActionsFromActionRows(
 567                 const std::list<ActionRow> & rows)
 568 {
 569         std::list<RollbackAction> actions;
 570
 571         for (const ActionRow &row : rows) {
 572                 RollbackAction action;
 573                 action.actor     = (row.actor) ? getActorName(row.actor) : "";
 574                 action.unix_time = row.timestamp;
 575                 action.type      = static_cast<RollbackAction::Type>(row.type);
 576
 577                 switch (action.type) {
 578                 case RollbackAction::TYPE_MODIFY_INVENTORY_STACK:
 579                         action.inventory_location = row.location;
 580                         action.inventory_list     = row.list;
 581                         action.inventory_index    = row.index;
 582                         action.inventory_add      = row.add;
 583                         action.inventory_stack    = row.stack;
 584                         if (action.inventory_stack.name.empty()) {
 585                                 action.inventory_stack.name = getNodeName(row.stack.id);
 586                         }
 587                         break;
 588
 589                 case RollbackAction::TYPE_SET_NODE:
 590                         action.p            = v3s16(row.x, row.y, row.z);
 591                         action.n_old.name   = getNodeName(row.oldNode);
 592                         action.n_old.param1 = row.oldParam1;
 593                         action.n_old.param2 = row.oldParam2;
 594                         action.n_old.meta   = row.oldMeta;
 595                         action.n_new.name   = getNodeName(row.newNode);
 596                         action.n_new.param1 = row.newParam1;
 597                         action.n_new.param2 = row.newParam2;
 598                         action.n_new.meta   = row.newMeta;
 599                         break;
 600
 601                 default:
 602                         throw ("W.T.F.");
 603                         break;
 604                 }
 605
 606                 actions.push_back(action);
 607         }
 608
 609         return actions;
 610 }
 611
 612
 613 const std::list<ActionRow> RollbackManager::getRowsSince(time_t firstTime, const std::string & actor)
 614 {
 615         sqlite3_stmt *stmt_stmt = actor.empty() ? stmt_select : stmt_select_withActor;
 616         sqlite3_bind_int64(stmt_stmt, 1, firstTime);
 617
 618         if (!actor.empty()) {
 619                 sqlite3_bind_int(stmt_stmt, 2, getActorId(actor));
 620         }
 621
 622         const std::list<ActionRow> & rows = actionRowsFromSelect(stmt_stmt);
 623         sqlite3_reset(stmt_stmt);
 624
 625         return rows;
 626 }
 627
 628
 629 const std::list<ActionRow> RollbackManager::getRowsSince_range(
 630                 time_t start_time, v3s16 p, int range, int limit)
 631 {
 632
 633         sqlite3_bind_int64(stmt_select_range, 1, start_time);
 634         sqlite3_bind_int  (stmt_select_range, 2, static_cast<int>(p.X - range));
 635         sqlite3_bind_int  (stmt_select_range, 3, static_cast<int>(p.X + range));
 636         sqlite3_bind_int  (stmt_select_range, 4, static_cast<int>(p.Y - range));
 637         sqlite3_bind_int  (stmt_select_range, 5, static_cast<int>(p.Y + range));
 638         sqlite3_bind_int  (stmt_select_range, 6, static_cast<int>(p.Z - range));
 639         sqlite3_bind_int  (stmt_select_range, 7, static_cast<int>(p.Z + range));
 640         sqlite3_bind_int  (stmt_select_range, 8, limit);
 641
 642         const std::list<ActionRow> & rows = actionRowsFromSelect(stmt_select_range);
 643         sqlite3_reset(stmt_select_range);
 644
 645         return rows;
 646 }
 647
 648
 649 const std::list<RollbackAction> RollbackManager::getActionsSince_range(
 650                 time_t start_time, v3s16 p, int range, int limit)
 651 {
 652         return rollbackActionsFromActionRows(getRowsSince_range(start_time, p, range, limit));
 653 }
 654
 655
 656 const std::list<RollbackAction> RollbackManager::getActionsSince(
 657                 time_t start_time, const std::string & actor)
 658 {
 659         return rollbackActionsFromActionRows(getRowsSince(start_time, actor));
 660 }
 661
 662
 663 // Get nearness factor for subject's action for this action
 664 // Return value: 0 = impossible, >0 = factor
 665 float RollbackManager::getSuspectNearness(bool is_guess, v3s16 suspect_p,
 666                 time_t suspect_t, v3s16 action_p, time_t action_t)
 667 {
 668         // Suspect cannot cause things in the past
 669         if (action_t < suspect_t) {
 670                 return 0;        // 0 = cannot be
 671         }
 672         // Start from 100
 673         int f = 100;
 674         // Distance (1 node = -x points)
 675         f -= POINTS_PER_NODE * intToFloat(suspect_p, 1).getDistanceFrom(intToFloat(action_p, 1));
 676         // Time (1 second = -x points)
 677         f -= 1 * (action_t - suspect_t);
 678         // If is a guess, halve the points
 679         if (is_guess) {
 680                 f *= 0.5;
 681         }
 682         // Limit to 0
 683         if (f < 0) {
 684                 f = 0;
 685         }
 686         return f;
 687 }
 688
 689
 690 void RollbackManager::reportAction(const RollbackAction &action_)
 691 {
 692         // Ignore if not important
 693         if (!action_.isImportant(gamedef)) {
 694                 return;
 695         }
 696
 697         RollbackAction action = action_;
 698         action.unix_time = time(0);
 699
 700         // Figure out actor
 701         action.actor = current_actor;
 702         action.actor_is_guess = current_actor_is_guess;
 703
 704         if (action.actor.empty()) { // If actor is not known, find out suspect or cancel
 705                 v3s16 p;
 706                 if (!action.getPosition(&p)) {
 707                         return;
 708                 }
 709
 710                 action.actor = getSuspect(p, 83, 1);
 711                 if (action.actor.empty()) {
 712                         return;
 713                 }
 714
 715                 action.actor_is_guess = true;
 716         }
 717
 718         addAction(action);
 719 }
 720
 721 std::string RollbackManager::getActor()
 722 {
 723         return current_actor;
 724 }
 725
 726 bool RollbackManager::isActorGuess()
 727 {
 728         return current_actor_is_guess;
 729 }
 730
 731 void RollbackManager::setActor(const std::string & actor, bool is_guess)
 732 {
 733         current_actor = actor;
 734         current_actor_is_guess = is_guess;
 735 }
 736
 737 std::string RollbackManager::getSuspect(v3s16 p, float nearness_shortcut,
 738                 float min_nearness)
 739 {
 740         if (!current_actor.empty()) {
 741                 return current_actor;
 742         }
 743         int cur_time = time(0);
 744         time_t first_time = cur_time - (100 - min_nearness);
 745         RollbackAction likely_suspect;
 746         float likely_suspect_nearness = 0;
 747         for (std::list<RollbackAction>::const_reverse_iterator
 748              i = action_latest_buffer.rbegin();
 749              i != action_latest_buffer.rend(); ++i) {
 750                 if (i->unix_time < first_time) {
 751                         break;
 752                 }
 753                 if (i->actor.empty()) {
 754                         continue;
 755                 }
 756                 // Find position of suspect or continue
 757                 v3s16 suspect_p;
 758                 if (!i->getPosition(&suspect_p)) {
 759                         continue;
 760                 }
 761                 float f = getSuspectNearness(i->actor_is_guess, suspect_p,
 762                                              i->unix_time, p, cur_time);
 763                 if (f >= min_nearness && f > likely_suspect_nearness) {
 764                         likely_suspect_nearness = f;
 765                         likely_suspect = *i;
 766                         if (likely_suspect_nearness >= nearness_shortcut) {
 767                                 break;
 768                         }
 769                 }
 770         }
 771         // No likely suspect was found
 772         if (likely_suspect_nearness == 0) {
 773                 return "";
 774         }
 775         // Likely suspect was found
 776         return likely_suspect.actor;
 777 }
 778
 779
 780 void RollbackManager::flush()
 781 {
 782         sqlite3_exec(db, "BEGIN", NULL, NULL, NULL);
 783
 784         std::list<RollbackAction>::const_iterator iter;
 785
 786         for (iter  = action_todisk_buffer.begin();
 787                         iter != action_todisk_buffer.end();
 788                         ++iter) {
 789                 if (iter->actor.empty()) {
 790                         continue;
 791                 }
 792
 793                 registerRow(actionRowFromRollbackAction(*iter));
 794         }
 795
 796         sqlite3_exec(db, "COMMIT", NULL, NULL, NULL);
 797         action_todisk_buffer.clear();
 798 }
 799
 800
 801 void RollbackManager::addAction(const RollbackAction & action)
 802 {
 803         action_todisk_buffer.push_back(action);
 804         action_latest_buffer.push_back(action);
 805
 806         // Flush to disk sometimes
 807         if (action_todisk_buffer.size() >= 500) {
 808                 flush();
 809         }
 810 }
 811
 812 std::list<RollbackAction> RollbackManager::getNodeActors(v3s16 pos, int range,
 813                 time_t seconds, int limit)
 814 {
 815         flush();
 816         time_t cur_time = time(0);
 817         time_t first_time = cur_time - seconds;
 818
 819         return getActionsSince_range(first_time, pos, range, limit);
 820 }
 821
 822 std::list<RollbackAction> RollbackManager::getRevertActions(
 823                 const std::string &actor_filter,
 824                 time_t seconds)
 825 {
 826         time_t cur_time = time(0);
 827         time_t first_time = cur_time - seconds;
 828
 829         flush();
 830
 831         return getActionsSince(first_time, actor_filter);
 832 }
 833