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minetest/src/rollback.cpp
Loïc Blot 7528986e44 Code modernization: src/p*, src/q*, src/r*, src/s* (partial) (#6282) 
* Code modernization: src/p*, src/q*, src/r*, src/s* (partial)

* empty function
* default constructor/destructor
* for range-based loops
* use emplace_back instead of push_back
* C++ STL header style
* Spelling: vertice -> vertex
2017-08-19 14:25:35 +02:00

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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "rollback.h"
#include <fstream>
#include <list>
#include <sstream>
#include "log.h"
#include "mapnode.h"
#include "gamedef.h"
#include "nodedef.h"
#include "util/serialize.h"
#include "util/string.h"
#include "util/numeric.h"
#include "inventorymanager.h" // deserializing InventoryLocations
#include "sqlite3.h"
#include "filesys.h"
#define POINTS_PER_NODE (16.0)
#define SQLRES(f, good) \
if ((f) != (good)) {\
throw FileNotGoodException(std::string("RollbackManager: " \
"SQLite3 error (" __FILE__ ":" TOSTRING(__LINE__) \
"): ") + sqlite3_errmsg(db)); \
}
#define SQLOK(f) SQLRES(f, SQLITE_OK)
#define SQLOK_ERRSTREAM(s, m) \
if ((s) != SQLITE_OK) { \
errorstream << "RollbackManager: " << (m) << ": " \
<< sqlite3_errmsg(db) << std::endl; \
}
#define FINALIZE_STATEMENT(statement) \
SQLOK_ERRSTREAM(sqlite3_finalize(statement), "Failed to finalize " #statement)
class ItemStackRow : public ItemStack {
public:
ItemStackRow & operator = (const ItemStack & other)
{
*static_cast<ItemStack *>(this) = other;
return *this;
}
int id;
};
struct ActionRow {
int id;
int actor;
time_t timestamp;
int type;
std::string location, list;
int index, add;
ItemStackRow stack;
int nodeMeta;
int x, y, z;
int oldNode;
int oldParam1, oldParam2;
std::string oldMeta;
int newNode;
int newParam1, newParam2;
std::string newMeta;
int guessed;
};
struct Entity {
int id;
std::string name;
};
RollbackManager::RollbackManager(const std::string & world_path,
IGameDef * gamedef_) :
gamedef(gamedef_)
{
verbosestream << "RollbackManager::RollbackManager(" << world_path
<< ")" << std::endl;
std::string txt_filename = world_path + DIR_DELIM "rollback.txt";
std::string migrating_flag = txt_filename + ".migrating";
database_path = world_path + DIR_DELIM "rollback.sqlite";
bool created = initDatabase();
if (fs::PathExists(txt_filename) && (created ||
fs::PathExists(migrating_flag))) {
std::ofstream of(migrating_flag.c_str());
of.close();
migrate(txt_filename);
fs::DeleteSingleFileOrEmptyDirectory(migrating_flag);
}
}
RollbackManager::~RollbackManager()
{
flush();
FINALIZE_STATEMENT(stmt_insert);
FINALIZE_STATEMENT(stmt_replace);
FINALIZE_STATEMENT(stmt_select);
FINALIZE_STATEMENT(stmt_select_range);
FINALIZE_STATEMENT(stmt_select_withActor);
FINALIZE_STATEMENT(stmt_knownActor_select);
FINALIZE_STATEMENT(stmt_knownActor_insert);
FINALIZE_STATEMENT(stmt_knownNode_select);
FINALIZE_STATEMENT(stmt_knownNode_insert);
SQLOK_ERRSTREAM(sqlite3_close(db), "Could not close db");
}
void RollbackManager::registerNewActor(const int id, const std::string &name)
{
Entity actor = {id, name};
knownActors.push_back(actor);
}
void RollbackManager::registerNewNode(const int id, const std::string &name)
{
Entity node = {id, name};
knownNodes.push_back(node);
}
int RollbackManager::getActorId(const std::string &name)
{
for (std::vector<Entity>::const_iterator iter = knownActors.begin();
iter != knownActors.end(); ++iter) {
if (iter->name == name) {
return iter->id;
}
}
SQLOK(sqlite3_bind_text(stmt_knownActor_insert, 1, name.c_str(), name.size(), NULL));
SQLRES(sqlite3_step(stmt_knownActor_insert), SQLITE_DONE);
SQLOK(sqlite3_reset(stmt_knownActor_insert));
int id = sqlite3_last_insert_rowid(db);
registerNewActor(id, name);
return id;
}
int RollbackManager::getNodeId(const std::string &name)
{
for (std::vector<Entity>::const_iterator iter = knownNodes.begin();
iter != knownNodes.end(); ++iter) {
if (iter->name == name) {
return iter->id;
}
}
SQLOK(sqlite3_bind_text(stmt_knownNode_insert, 1, name.c_str(), name.size(), NULL));
SQLRES(sqlite3_step(stmt_knownNode_insert), SQLITE_DONE);
SQLOK(sqlite3_reset(stmt_knownNode_insert));
int id = sqlite3_last_insert_rowid(db);
registerNewNode(id, name);
return id;
}
const char * RollbackManager::getActorName(const int id)
{
for (std::vector<Entity>::const_iterator iter = knownActors.begin();
iter != knownActors.end(); ++iter) {
if (iter->id == id) {
return iter->name.c_str();
}
}
return "";
}
const char * RollbackManager::getNodeName(const int id)
{
for (std::vector<Entity>::const_iterator iter = knownNodes.begin();
iter != knownNodes.end(); ++iter) {
if (iter->id == id) {
return iter->name.c_str();
}
}
return "";
}
bool RollbackManager::createTables()
{
SQLOK(sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS `actor` (\n"
" `id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,\n"
" `name` TEXT NOT NULL\n"
");\n"
"CREATE TABLE IF NOT EXISTS `node` (\n"
" `id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,\n"
" `name` TEXT NOT NULL\n"
");\n"
"CREATE TABLE IF NOT EXISTS `action` (\n"
" `id` INTEGER PRIMARY KEY AUTOINCREMENT,\n"
" `actor` INTEGER NOT NULL,\n"
" `timestamp` TIMESTAMP NOT NULL,\n"
" `type` INTEGER NOT NULL,\n"
" `list` TEXT,\n"
" `index` INTEGER,\n"
" `add` INTEGER,\n"
" `stackNode` INTEGER,\n"
" `stackQuantity` INTEGER,\n"
" `nodeMeta` INTEGER,\n"
" `x` INT,\n"
" `y` INT,\n"
" `z` INT,\n"
" `oldNode` INTEGER,\n"
" `oldParam1` INTEGER,\n"
" `oldParam2` INTEGER,\n"
" `oldMeta` TEXT,\n"
" `newNode` INTEGER,\n"
" `newParam1` INTEGER,\n"
" `newParam2` INTEGER,\n"
" `newMeta` TEXT,\n"
" `guessedActor` INTEGER,\n"
" FOREIGN KEY (`actor`) REFERENCES `actor`(`id`),\n"
" FOREIGN KEY (`stackNode`) REFERENCES `node`(`id`),\n"
" FOREIGN KEY (`oldNode`) REFERENCES `node`(`id`),\n"
" FOREIGN KEY (`newNode`) REFERENCES `node`(`id`)\n"
");\n"
"CREATE INDEX IF NOT EXISTS `actionIndex` ON `action`(`x`,`y`,`z`,`timestamp`,`actor`);\n",
NULL, NULL, NULL));
verbosestream << "SQL Rollback: SQLite3 database structure was created" << std::endl;
return true;
}
bool RollbackManager::initDatabase()
{
verbosestream << "RollbackManager: Database connection setup" << std::endl;
bool needs_create = !fs::PathExists(database_path);
SQLOK(sqlite3_open_v2(database_path.c_str(), &db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL));
if (needs_create) {
createTables();
}
SQLOK(sqlite3_prepare_v2(db,
"INSERT INTO `action` (\n"
" `actor`, `timestamp`, `type`,\n"
" `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodeMeta`,\n"
" `x`, `y`, `z`,\n"
" `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
" `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
" `guessedActor`\n"
") VALUES (\n"
" ?, ?, ?,\n"
" ?, ?, ?, ?, ?, ?,\n"
" ?, ?, ?,\n"
" ?, ?, ?, ?,\n"
" ?, ?, ?, ?,\n"
" ?"
");",
-1, &stmt_insert, NULL));
SQLOK(sqlite3_prepare_v2(db,
"REPLACE INTO `action` (\n"
" `actor`, `timestamp`, `type`,\n"
" `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodeMeta`,\n"
" `x`, `y`, `z`,\n"
" `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
" `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
" `guessedActor`, `id`\n"
") VALUES (\n"
" ?, ?, ?,\n"
" ?, ?, ?, ?, ?, ?,\n"
" ?, ?, ?,\n"
" ?, ?, ?, ?,\n"
" ?, ?, ?, ?,\n"
" ?, ?\n"
");",
-1, &stmt_replace, NULL));
SQLOK(sqlite3_prepare_v2(db,
"SELECT\n"
" `actor`, `timestamp`, `type`,\n"
" `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodemeta`,\n"
" `x`, `y`, `z`,\n"
" `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
" `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
" `guessedActor`\n"
" FROM `action`\n"
" WHERE `timestamp` >= ?\n"
" ORDER BY `timestamp` DESC, `id` DESC",
-1, &stmt_select, NULL));
SQLOK(sqlite3_prepare_v2(db,
"SELECT\n"
" `actor`, `timestamp`, `type`,\n"
" `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodemeta`,\n"
" `x`, `y`, `z`,\n"
" `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
" `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
" `guessedActor`\n"
"FROM `action`\n"
"WHERE `timestamp` >= ?\n"
" AND `x` IS NOT NULL\n"
" AND `y` IS NOT NULL\n"
" AND `z` IS NOT NULL\n"
" AND `x` BETWEEN ? AND ?\n"
" AND `y` BETWEEN ? AND ?\n"
" AND `z` BETWEEN ? AND ?\n"
"ORDER BY `timestamp` DESC, `id` DESC\n"
"LIMIT 0,?",
-1, &stmt_select_range, NULL));
SQLOK(sqlite3_prepare_v2(db,
"SELECT\n"
" `actor`, `timestamp`, `type`,\n"
" `list`, `index`, `add`, `stackNode`, `stackQuantity`, `nodemeta`,\n"
" `x`, `y`, `z`,\n"
" `oldNode`, `oldParam1`, `oldParam2`, `oldMeta`,\n"
" `newNode`, `newParam1`, `newParam2`, `newMeta`,\n"
" `guessedActor`\n"
"FROM `action`\n"
"WHERE `timestamp` >= ?\n"
" AND `actor` = ?\n"
"ORDER BY `timestamp` DESC, `id` DESC\n",
-1, &stmt_select_withActor, NULL));
SQLOK(sqlite3_prepare_v2(db, "SELECT `id`, `name` FROM `actor`",
-1, &stmt_knownActor_select, NULL));
SQLOK(sqlite3_prepare_v2(db, "INSERT INTO `actor` (`name`) VALUES (?)",
-1, &stmt_knownActor_insert, NULL));
SQLOK(sqlite3_prepare_v2(db, "SELECT `id`, `name` FROM `node`",
-1, &stmt_knownNode_select, NULL));
SQLOK(sqlite3_prepare_v2(db, "INSERT INTO `node` (`name`) VALUES (?)",
-1, &stmt_knownNode_insert, NULL));
verbosestream << "SQL prepared statements setup correctly" << std::endl;
while (sqlite3_step(stmt_knownActor_select) == SQLITE_ROW) {
registerNewActor(
sqlite3_column_int(stmt_knownActor_select, 0),
reinterpret_cast<const char *>(sqlite3_column_text(stmt_knownActor_select, 1))
);
}
SQLOK(sqlite3_reset(stmt_knownActor_select));
while (sqlite3_step(stmt_knownNode_select) == SQLITE_ROW) {
registerNewNode(
sqlite3_column_int(stmt_knownNode_select, 0),
reinterpret_cast<const char *>(sqlite3_column_text(stmt_knownNode_select, 1))
);
}
SQLOK(sqlite3_reset(stmt_knownNode_select));
return needs_create;
}
bool RollbackManager::registerRow(const ActionRow & row)
{
sqlite3_stmt * stmt_do = (row.id) ? stmt_replace : stmt_insert;
bool nodeMeta = false;
SQLOK(sqlite3_bind_int (stmt_do, 1, row.actor));
SQLOK(sqlite3_bind_int64(stmt_do, 2, row.timestamp));
SQLOK(sqlite3_bind_int (stmt_do, 3, row.type));
if (row.type == RollbackAction::TYPE_MODIFY_INVENTORY_STACK) {
const std::string & loc = row.location;
nodeMeta = (loc.substr(0, 9) == "nodemeta:");
SQLOK(sqlite3_bind_text(stmt_do, 4, row.list.c_str(), row.list.size(), NULL));
SQLOK(sqlite3_bind_int (stmt_do, 5, row.index));
SQLOK(sqlite3_bind_int (stmt_do, 6, row.add));
SQLOK(sqlite3_bind_int (stmt_do, 7, row.stack.id));
SQLOK(sqlite3_bind_int (stmt_do, 8, row.stack.count));
SQLOK(sqlite3_bind_int (stmt_do, 9, (int) nodeMeta));
if (nodeMeta) {
std::string::size_type p1, p2;
p1 = loc.find(':') + 1;
p2 = loc.find(',');
std::string x = loc.substr(p1, p2 - p1);
p1 = p2 + 1;
p2 = loc.find(',', p1);
std::string y = loc.substr(p1, p2 - p1);
std::string z = loc.substr(p2 + 1);
SQLOK(sqlite3_bind_int(stmt_do, 10, atoi(x.c_str())));
SQLOK(sqlite3_bind_int(stmt_do, 11, atoi(y.c_str())));
SQLOK(sqlite3_bind_int(stmt_do, 12, atoi(z.c_str())));
}
} else {
SQLOK(sqlite3_bind_null(stmt_do, 4));
SQLOK(sqlite3_bind_null(stmt_do, 5));
SQLOK(sqlite3_bind_null(stmt_do, 6));
SQLOK(sqlite3_bind_null(stmt_do, 7));
SQLOK(sqlite3_bind_null(stmt_do, 8));
SQLOK(sqlite3_bind_null(stmt_do, 9));
}
if (row.type == RollbackAction::TYPE_SET_NODE) {
SQLOK(sqlite3_bind_int (stmt_do, 10, row.x));
SQLOK(sqlite3_bind_int (stmt_do, 11, row.y));
SQLOK(sqlite3_bind_int (stmt_do, 12, row.z));
SQLOK(sqlite3_bind_int (stmt_do, 13, row.oldNode));
SQLOK(sqlite3_bind_int (stmt_do, 14, row.oldParam1));
SQLOK(sqlite3_bind_int (stmt_do, 15, row.oldParam2));
SQLOK(sqlite3_bind_text(stmt_do, 16, row.oldMeta.c_str(), row.oldMeta.size(), NULL));
SQLOK(sqlite3_bind_int (stmt_do, 17, row.newNode));
SQLOK(sqlite3_bind_int (stmt_do, 18, row.newParam1));
SQLOK(sqlite3_bind_int (stmt_do, 19, row.newParam2));
SQLOK(sqlite3_bind_text(stmt_do, 20, row.newMeta.c_str(), row.newMeta.size(), NULL));
SQLOK(sqlite3_bind_int (stmt_do, 21, row.guessed ? 1 : 0));
} else {
if (!nodeMeta) {
SQLOK(sqlite3_bind_null(stmt_do, 10));
SQLOK(sqlite3_bind_null(stmt_do, 11));
SQLOK(sqlite3_bind_null(stmt_do, 12));
}
SQLOK(sqlite3_bind_null(stmt_do, 13));
SQLOK(sqlite3_bind_null(stmt_do, 14));
SQLOK(sqlite3_bind_null(stmt_do, 15));
SQLOK(sqlite3_bind_null(stmt_do, 16));
SQLOK(sqlite3_bind_null(stmt_do, 17));
SQLOK(sqlite3_bind_null(stmt_do, 18));
SQLOK(sqlite3_bind_null(stmt_do, 19));
SQLOK(sqlite3_bind_null(stmt_do, 20));
SQLOK(sqlite3_bind_null(stmt_do, 21));
}
if (row.id) {
SQLOK(sqlite3_bind_int(stmt_do, 22, row.id));
}
int written = sqlite3_step(stmt_do);
SQLOK(sqlite3_reset(stmt_do));
return written == SQLITE_DONE;
}
const std::list<ActionRow> RollbackManager::actionRowsFromSelect(sqlite3_stmt* stmt)
{
std::list<ActionRow> rows;
const unsigned char * text;
size_t size;
while (sqlite3_step(stmt) == SQLITE_ROW) {
ActionRow row;
row.actor = sqlite3_column_int (stmt, 0);
row.timestamp = sqlite3_column_int64(stmt, 1);
row.type = sqlite3_column_int (stmt, 2);
if (row.type == RollbackAction::TYPE_MODIFY_INVENTORY_STACK) {
text = sqlite3_column_text (stmt, 3);
size = sqlite3_column_bytes(stmt, 3);
row.list = std::string(reinterpret_cast<const char*>(text), size);
row.index = sqlite3_column_int(stmt, 4);
row.add = sqlite3_column_int(stmt, 5);
row.stack.id = sqlite3_column_int(stmt, 6);
row.stack.count = sqlite3_column_int(stmt, 7);
row.nodeMeta = sqlite3_column_int(stmt, 8);
}
if (row.type == RollbackAction::TYPE_SET_NODE || row.nodeMeta) {
row.x = sqlite3_column_int(stmt, 9);
row.y = sqlite3_column_int(stmt, 10);
row.z = sqlite3_column_int(stmt, 11);
}
if (row.type == RollbackAction::TYPE_SET_NODE) {
row.oldNode = sqlite3_column_int(stmt, 12);
row.oldParam1 = sqlite3_column_int(stmt, 13);
row.oldParam2 = sqlite3_column_int(stmt, 14);
text = sqlite3_column_text (stmt, 15);
size = sqlite3_column_bytes(stmt, 15);
row.oldMeta = std::string(reinterpret_cast<const char*>(text), size);
row.newNode = sqlite3_column_int(stmt, 16);
row.newParam1 = sqlite3_column_int(stmt, 17);
row.newParam2 = sqlite3_column_int(stmt, 18);
text = sqlite3_column_text(stmt, 19);
size = sqlite3_column_bytes(stmt, 19);
row.newMeta = std::string(reinterpret_cast<const char*>(text), size);
row.guessed = sqlite3_column_int(stmt, 20);
}
if (row.nodeMeta) {
row.location = "nodemeta:";
row.location += itos(row.x);
row.location += ',';
row.location += itos(row.y);
row.location += ',';
row.location += itos(row.z);
} else {
row.location = getActorName(row.actor);
}
rows.push_back(row);
}
SQLOK(sqlite3_reset(stmt));
return rows;
}
ActionRow RollbackManager::actionRowFromRollbackAction(const RollbackAction & action)
{
ActionRow row;
row.id = 0;
row.actor = getActorId(action.actor);
row.timestamp = action.unix_time;
row.type = action.type;
if (row.type == RollbackAction::TYPE_MODIFY_INVENTORY_STACK) {
row.location = action.inventory_location;
row.list = action.inventory_list;
row.index = action.inventory_index;
row.add = action.inventory_add;
row.stack = action.inventory_stack;
row.stack.id = getNodeId(row.stack.name);
} else {
row.x = action.p.X;
row.y = action.p.Y;
row.z = action.p.Z;
row.oldNode = getNodeId(action.n_old.name);
row.oldParam1 = action.n_old.param1;
row.oldParam2 = action.n_old.param2;
row.oldMeta = action.n_old.meta;
row.newNode = getNodeId(action.n_new.name);
row.newParam1 = action.n_new.param1;
row.newParam2 = action.n_new.param2;
row.newMeta = action.n_new.meta;
row.guessed = action.actor_is_guess;
}
return row;
}
const std::list<RollbackAction> RollbackManager::rollbackActionsFromActionRows(
const std::list<ActionRow> & rows)
{
std::list<RollbackAction> actions;
for (const ActionRow &row : rows) {
RollbackAction action;
action.actor = (row.actor) ? getActorName(row.actor) : "";
action.unix_time = row.timestamp;
action.type = static_cast<RollbackAction::Type>(row.type);
switch (action.type) {
case RollbackAction::TYPE_MODIFY_INVENTORY_STACK:
action.inventory_location = row.location;
action.inventory_list = row.list;
action.inventory_index = row.index;
action.inventory_add = row.add;
action.inventory_stack = row.stack;
if (action.inventory_stack.name.empty()) {
action.inventory_stack.name = getNodeName(row.stack.id);
}
break;
case RollbackAction::TYPE_SET_NODE:
action.p = v3s16(row.x, row.y, row.z);
action.n_old.name = getNodeName(row.oldNode);
action.n_old.param1 = row.oldParam1;
action.n_old.param2 = row.oldParam2;
action.n_old.meta = row.oldMeta;
action.n_new.name = getNodeName(row.newNode);
action.n_new.param1 = row.newParam1;
action.n_new.param2 = row.newParam2;
action.n_new.meta = row.newMeta;
break;
default:
throw ("W.T.F.");
break;
}
actions.push_back(action);
}
return actions;
}
const std::list<ActionRow> RollbackManager::getRowsSince(time_t firstTime, const std::string & actor)
{
sqlite3_stmt *stmt_stmt = actor.empty() ? stmt_select : stmt_select_withActor;
sqlite3_bind_int64(stmt_stmt, 1, firstTime);
if (!actor.empty()) {
sqlite3_bind_int(stmt_stmt, 2, getActorId(actor));
}
const std::list<ActionRow> & rows = actionRowsFromSelect(stmt_stmt);
sqlite3_reset(stmt_stmt);
return rows;
}
const std::list<ActionRow> RollbackManager::getRowsSince_range(
time_t start_time, v3s16 p, int range, int limit)
{
sqlite3_bind_int64(stmt_select_range, 1, start_time);
sqlite3_bind_int (stmt_select_range, 2, static_cast<int>(p.X - range));
sqlite3_bind_int (stmt_select_range, 3, static_cast<int>(p.X + range));
sqlite3_bind_int (stmt_select_range, 4, static_cast<int>(p.Y - range));
sqlite3_bind_int (stmt_select_range, 5, static_cast<int>(p.Y + range));
sqlite3_bind_int (stmt_select_range, 6, static_cast<int>(p.Z - range));
sqlite3_bind_int (stmt_select_range, 7, static_cast<int>(p.Z + range));
sqlite3_bind_int (stmt_select_range, 8, limit);
const std::list<ActionRow> & rows = actionRowsFromSelect(stmt_select_range);
sqlite3_reset(stmt_select_range);
return rows;
}
const std::list<RollbackAction> RollbackManager::getActionsSince_range(
time_t start_time, v3s16 p, int range, int limit)
{
return rollbackActionsFromActionRows(getRowsSince_range(start_time, p, range, limit));
}
const std::list<RollbackAction> RollbackManager::getActionsSince(
time_t start_time, const std::string & actor)
{
return rollbackActionsFromActionRows(getRowsSince(start_time, actor));
}
void RollbackManager::migrate(const std::string & file_path)
{
std::cout << "Migrating from rollback.txt to rollback.sqlite." << std::endl;
std::ifstream fh(file_path.c_str(), std::ios::in | std::ios::ate);
if (!fh.good()) {
throw FileNotGoodException("Unable to open rollback.txt");
}
std::streampos file_size = fh.tellg();
if (file_size < 10) {
errorstream << "Empty rollback log." << std::endl;
return;
}
fh.seekg(0);
sqlite3_stmt *stmt_begin;
sqlite3_stmt *stmt_commit;
SQLOK(sqlite3_prepare_v2(db, "BEGIN", -1, &stmt_begin, NULL));
SQLOK(sqlite3_prepare_v2(db, "COMMIT", -1, &stmt_commit, NULL));
std::string bit;
int i = 0;
time_t start = time(0);
time_t t = start;
SQLRES(sqlite3_step(stmt_begin), SQLITE_DONE);
sqlite3_reset(stmt_begin);
do {
ActionRow row;
row.id = 0;
// Get the timestamp
std::getline(fh, bit, ' ');
bit = trim(bit);
if (!atoi(bit.c_str())) {
std::getline(fh, bit);
continue;
}
row.timestamp = atoi(bit.c_str());
// Get the actor
row.actor = getActorId(deSerializeJsonString(fh));
// Get the action type
std::getline(fh, bit, '[');
std::getline(fh, bit, ' ');
if (bit == "modify_inventory_stack") {
row.type = RollbackAction::TYPE_MODIFY_INVENTORY_STACK;
row.location = trim(deSerializeJsonString(fh));
std::getline(fh, bit, ' ');
row.list = trim(deSerializeJsonString(fh));
std::getline(fh, bit, ' ');
std::getline(fh, bit, ' ');
row.index = atoi(trim(bit).c_str());
std::getline(fh, bit, ' ');
row.add = (int)(trim(bit) == "add");
row.stack.deSerialize(deSerializeJsonString(fh));
row.stack.id = getNodeId(row.stack.name);
std::getline(fh, bit);
} else if (bit == "set_node") {
row.type = RollbackAction::TYPE_SET_NODE;
std::getline(fh, bit, '(');
std::getline(fh, bit, ',');
row.x = atoi(trim(bit).c_str());
std::getline(fh, bit, ',');
row.y = atoi(trim(bit).c_str());
std::getline(fh, bit, ')');
row.z = atoi(trim(bit).c_str());
std::getline(fh, bit, ' ');
row.oldNode = getNodeId(trim(deSerializeJsonString(fh)));
std::getline(fh, bit, ' ');
std::getline(fh, bit, ' ');
row.oldParam1 = atoi(trim(bit).c_str());
std::getline(fh, bit, ' ');
row.oldParam2 = atoi(trim(bit).c_str());
row.oldMeta = trim(deSerializeJsonString(fh));
std::getline(fh, bit, ' ');
row.newNode = getNodeId(trim(deSerializeJsonString(fh)));
std::getline(fh, bit, ' ');
std::getline(fh, bit, ' ');
row.newParam1 = atoi(trim(bit).c_str());
std::getline(fh, bit, ' ');
row.newParam2 = atoi(trim(bit).c_str());
row.newMeta = trim(deSerializeJsonString(fh));
std::getline(fh, bit, ' ');
std::getline(fh, bit, ' ');
std::getline(fh, bit);
row.guessed = (int)(trim(bit) == "actor_is_guess");
} else {
errorstream << "Unrecognized rollback action type \""
<< bit << "\"!" << std::endl;
continue;
}
registerRow(row);
++i;
if (time(0) - t >= 1) {
SQLRES(sqlite3_step(stmt_commit), SQLITE_DONE);
sqlite3_reset(stmt_commit);
t = time(0);
std::cout
<< " Done: " << static_cast<int>((static_cast<float>(fh.tellg()) / static_cast<float>(file_size)) * 100) << "%"
<< " Speed: " << i / (t - start) << "/second \r" << std::flush;
SQLRES(sqlite3_step(stmt_begin), SQLITE_DONE);
sqlite3_reset(stmt_begin);
}
} while (fh.good());
SQLRES(sqlite3_step(stmt_commit), SQLITE_DONE);
sqlite3_reset(stmt_commit);
SQLOK(sqlite3_finalize(stmt_begin));
SQLOK(sqlite3_finalize(stmt_commit));
std::cout
<< " Done: 100% " << std::endl
<< "Now you can delete the old rollback.txt file." << std::endl;
}
// Get nearness factor for subject's action for this action
// Return value: 0 = impossible, >0 = factor
float RollbackManager::getSuspectNearness(bool is_guess, v3s16 suspect_p,
time_t suspect_t, v3s16 action_p, time_t action_t)
{
// Suspect cannot cause things in the past
if (action_t < suspect_t) {
return 0; // 0 = cannot be
}
// Start from 100
int f = 100;
// Distance (1 node = -x points)
f -= POINTS_PER_NODE * intToFloat(suspect_p, 1).getDistanceFrom(intToFloat(action_p, 1));
// Time (1 second = -x points)
f -= 1 * (action_t - suspect_t);
// If is a guess, halve the points
if (is_guess) {
f *= 0.5;
}
// Limit to 0
if (f < 0) {
f = 0;
}
return f;
}
void RollbackManager::reportAction(const RollbackAction &action_)
{
// Ignore if not important
if (!action_.isImportant(gamedef)) {
return;
}
RollbackAction action = action_;
action.unix_time = time(0);
// Figure out actor
action.actor = current_actor;
action.actor_is_guess = current_actor_is_guess;
if (action.actor.empty()) { // If actor is not known, find out suspect or cancel
v3s16 p;
if (!action.getPosition(&p)) {
return;
}
action.actor = getSuspect(p, 83, 1);
if (action.actor.empty()) {
return;
}
action.actor_is_guess = true;
}
addAction(action);
}
std::string RollbackManager::getActor()
{
return current_actor;
}
bool RollbackManager::isActorGuess()
{
return current_actor_is_guess;
}
void RollbackManager::setActor(const std::string & actor, bool is_guess)
{
current_actor = actor;
current_actor_is_guess = is_guess;
}
std::string RollbackManager::getSuspect(v3s16 p, float nearness_shortcut,
float min_nearness)
{
if (!current_actor.empty()) {
return current_actor;
}
int cur_time = time(0);
time_t first_time = cur_time - (100 - min_nearness);
RollbackAction likely_suspect;
float likely_suspect_nearness = 0;
for (std::list<RollbackAction>::const_reverse_iterator
i = action_latest_buffer.rbegin();
i != action_latest_buffer.rend(); ++i) {
if (i->unix_time < first_time) {
break;
}
if (i->actor.empty()) {
continue;
}
// Find position of suspect or continue
v3s16 suspect_p;
if (!i->getPosition(&suspect_p)) {
continue;
}
float f = getSuspectNearness(i->actor_is_guess, suspect_p,
i->unix_time, p, cur_time);
if (f >= min_nearness && f > likely_suspect_nearness) {
likely_suspect_nearness = f;
likely_suspect = *i;
if (likely_suspect_nearness >= nearness_shortcut) {
break;
}
}
}
// No likely suspect was found
if (likely_suspect_nearness == 0) {
return "";
}
// Likely suspect was found
return likely_suspect.actor;
}
void RollbackManager::flush()
{
sqlite3_exec(db, "BEGIN", NULL, NULL, NULL);
std::list<RollbackAction>::const_iterator iter;
for (iter = action_todisk_buffer.begin();
iter != action_todisk_buffer.end();
++iter) {
if (iter->actor.empty()) {
continue;
}
registerRow(actionRowFromRollbackAction(*iter));
}
sqlite3_exec(db, "COMMIT", NULL, NULL, NULL);
action_todisk_buffer.clear();
}
void RollbackManager::addAction(const RollbackAction & action)
{
action_todisk_buffer.push_back(action);
action_latest_buffer.push_back(action);
// Flush to disk sometimes
if (action_todisk_buffer.size() >= 500) {
flush();
}
}
std::list<RollbackAction> RollbackManager::getEntriesSince(time_t first_time)
{
flush();
return getActionsSince(first_time);
}
std::list<RollbackAction> RollbackManager::getNodeActors(v3s16 pos, int range,
time_t seconds, int limit)
{
flush();
time_t cur_time = time(0);
time_t first_time = cur_time - seconds;
return getActionsSince_range(first_time, pos, range, limit);
}
std::list<RollbackAction> RollbackManager::getRevertActions(
const std::string &actor_filter,
time_t seconds)
{
time_t cur_time = time(0);
time_t first_time = cur_time - seconds;
flush();
return getActionsSince(first_time, actor_filter);
}
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