src/Database/DBStructure.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Database;
  23
  24 use Exception;
  25 use Friendica\Core\Hook;
  26 use Friendica\Core\Logger;
  27 use Friendica\DI;
  28 use Friendica\Model\Item;
  29 use Friendica\Model\User;
  30 use Friendica\Util\DateTimeFormat;
  31
  32 /**
  33  * This class contains functions that doesn't need to know if pdo, mysqli or whatever is used.
  34  */
  35 class DBStructure
  36 {
  37         const UPDATE_NOT_CHECKED = 0; // Database check wasn't executed before
  38         const UPDATE_SUCCESSFUL  = 1; // Database check was successful
  39         const UPDATE_FAILED      = 2; // Database check failed
  40
  41         const RENAME_COLUMN      = 0;
  42         const RENAME_PRIMARY_KEY = 1;
  43
  44         /**
  45          * Database structure definition loaded from config/dbstructure.config.php
  46          *
  47          * @var array
  48          */
  49         private static $definition = [];
  50
  51         /**
  52          * Set a database version to trigger update functions
  53          *
  54          * @param string $version
  55          * @return void
  56          */
  57         public static function setDatabaseVersion(string $version)
  58         {
  59                 if (!is_numeric($version)) {
  60                         throw new \Asika\SimpleConsole\CommandArgsException('The version number must be numeric');
  61                 }
  62
  63                 DI::config()->set('system', 'build', $version);
  64                 echo DI::l10n()->t('The database version had been set to %s.', $version);
  65         }
  66
  67         /**
  68          * Drop unused tables
  69          *
  70          * @param boolean $execute
  71          * @return void
  72          */
  73         public static function dropTables(bool $execute)
  74         {
  75                 $old_tables = ['fserver', 'gcign', 'gcontact', 'gcontact-relation', 'gfollower' ,'glink', 'item-delivery-data',
  76                 'item_id', 'poll', 'poll_result', 'queue', 'retriever_rule', 'sign', 'spam', 'term'];
  77
  78                 $tables = DBA::selectToArray(['INFORMATION_SCHEMA' => 'TABLES'], ['TABLE_NAME'],
  79                         ['TABLE_SCHEMA' => DBA::databaseName(), 'TABLE_TYPE' => 'BASE TABLE']);
  80
  81                 if (empty($tables)) {
  82                         echo DI::l10n()->t('No unused tables found.');
  83                         return;
  84                 }
  85
  86                 if (!$execute) {
  87                         echo DI::l10n()->t('These tables are not used for friendica and will be deleted when you execute "dbstructure drop -e":') . "\n\n";
  88                 }
  89
  90                 foreach ($tables as $table) {
  91                         if (in_array($table['TABLE_NAME'], $old_tables)) {
  92                                 if ($execute) {
  93                                         $sql = 'DROP TABLE ' . DBA::quoteIdentifier($table['TABLE_NAME']) . ';';
  94                                         echo $sql . "\n";
  95
  96                                         $result = DBA::e($sql);
  97                                         if (!DBA::isResult($result)) {
  98                                                 self::printUpdateError($sql);
  99                                         }
 100                                 } else {
 101                                         echo $table['TABLE_NAME'] . "\n";
 102                                 }
 103                         }
 104                 }
 105         }
 106
 107         /**
 108          * Converts all tables from MyISAM/InnoDB Antelope to InnoDB Barracuda
 109          */
 110         public static function convertToInnoDB()
 111         {
 112                 $tables = DBA::selectToArray(
 113                         ['information_schema' => 'tables'],
 114                         ['table_name'],
 115                         ['engine' => 'MyISAM', 'table_schema' => DBA::databaseName()]
 116                 );
 117
 118                 $tables = array_merge($tables, DBA::selectToArray(
 119                         ['information_schema' => 'tables'],
 120                         ['table_name'],
 121                         ['engine' => 'InnoDB', 'ROW_FORMAT' => ['COMPACT', 'REDUNDANT'], 'table_schema' => DBA::databaseName()]
 122                 ));
 123
 124                 if (!DBA::isResult($tables)) {
 125                         echo DI::l10n()->t('There are no tables on MyISAM or InnoDB with the Antelope file format.') . "\n";
 126                         return;
 127                 }
 128
 129                 foreach ($tables AS $table) {
 130                         $sql = "ALTER TABLE " . DBA::quoteIdentifier($table['table_name']) . " ENGINE=InnoDB ROW_FORMAT=DYNAMIC;";
 131                         echo $sql . "\n";
 132
 133                         $result = DBA::e($sql);
 134                         if (!DBA::isResult($result)) {
 135                                 self::printUpdateError($sql);
 136                         }
 137                 }
 138         }
 139
 140         /**
 141          * Print out database error messages
 142          *
 143          * @param string $message Message to be added to the error message
 144          *
 145          * @return string Error message
 146          */
 147         private static function printUpdateError($message)
 148         {
 149                 echo DI::l10n()->t("\nError %d occurred during database update:\n%s\n",
 150                         DBA::errorNo(), DBA::errorMessage());
 151
 152                 return DI::l10n()->t('Errors encountered performing database changes: ') . $message . EOL;
 153         }
 154
 155         public static function printStructure($basePath)
 156         {
 157                 $database = self::definition($basePath, false);
 158
 159                 echo "-- ------------------------------------------\n";
 160                 echo "-- " . FRIENDICA_PLATFORM . " " . FRIENDICA_VERSION . " (" . FRIENDICA_CODENAME, ")\n";
 161                 echo "-- DB_UPDATE_VERSION " . DB_UPDATE_VERSION . "\n";
 162                 echo "-- ------------------------------------------\n\n\n";
 163                 foreach ($database AS $name => $structure) {
 164                         echo "--\n";
 165                         echo "-- TABLE $name\n";
 166                         echo "--\n";
 167                         self::createTable($name, $structure, true, false);
 168
 169                         echo "\n";
 170                 }
 171
 172                 View::printStructure($basePath);
 173         }
 174
 175         /**
 176          * Loads the database structure definition from the static/dbstructure.config.php file.
 177          * On first pass, defines DB_UPDATE_VERSION constant.
 178          *
 179          * @see static/dbstructure.config.php
 180          * @param boolean $with_addons_structure Whether to tack on addons additional tables
 181          * @param string  $basePath              The base path of this application
 182          * @return array
 183          * @throws Exception
 184          */
 185         public static function definition($basePath, $with_addons_structure = true)
 186         {
 187                 if (!self::$definition) {
 188
 189                         $filename = $basePath . '/static/dbstructure.config.php';
 190
 191                         if (!is_readable($filename)) {
 192                                 throw new Exception('Missing database structure config file static/dbstructure.config.php');
 193                         }
 194
 195                         $definition = require $filename;
 196
 197                         if (!$definition) {
 198                                 throw new Exception('Corrupted database structure config file static/dbstructure.config.php');
 199                         }
 200
 201                         self::$definition = $definition;
 202                 } else {
 203                         $definition = self::$definition;
 204                 }
 205
 206                 if ($with_addons_structure) {
 207                         Hook::callAll('dbstructure_definition', $definition);
 208                 }
 209
 210                 return $definition;
 211         }
 212
 213         /**
 214          * Get field data for the given table
 215          *
 216          * @param string $table
 217          * @param array $data data fields
 218          * @return array fields for the given
 219          */
 220         public static function getFieldsForTable(string $table, array $data = [])
 221         {
 222                 $definition = DBStructure::definition('', false);
 223                 if (empty($definition[$table])) {
 224                         return [];
 225                 }
 226
 227                 $fieldnames = array_keys($definition[$table]['fields']);
 228
 229                 $fields = [];
 230
 231                 // Assign all field that are present in the table
 232                 foreach ($fieldnames as $field) {
 233                         if (isset($data[$field])) {
 234                                 $fields[$field] = $data[$field];
 235                         }
 236                 }
 237
 238                 return $fields;
 239         }
 240
 241         private static function createTable($name, $structure, $verbose, $action)
 242         {
 243                 $r = true;
 244
 245                 $engine = "";
 246                 $comment = "";
 247                 $sql_rows = [];
 248                 $primary_keys = [];
 249                 $foreign_keys = [];
 250
 251                 foreach ($structure["fields"] AS $fieldname => $field) {
 252                         $sql_rows[] = "`" . DBA::escape($fieldname) . "` " . self::FieldCommand($field);
 253                         if (!empty($field['primary'])) {
 254                                 $primary_keys[] = $fieldname;
 255                         }
 256                         if (!empty($field['foreign'])) {
 257                                 $foreign_keys[$fieldname] = $field;
 258                         }
 259                 }
 260
 261                 if (!empty($structure["indexes"])) {
 262                         foreach ($structure["indexes"] AS $indexname => $fieldnames) {
 263                                 $sql_index = self::createIndex($indexname, $fieldnames, "");
 264                                 if (!is_null($sql_index)) {
 265                                         $sql_rows[] = $sql_index;
 266                                 }
 267                         }
 268                 }
 269
 270                 foreach ($foreign_keys AS $fieldname => $parameters) {
 271                         $sql_rows[] = self::foreignCommand($name, $fieldname, $parameters);
 272                 }
 273
 274                 if (isset($structure["engine"])) {
 275                         $engine = " ENGINE=" . $structure["engine"];
 276                 }
 277
 278                 if (isset($structure["comment"])) {
 279                         $comment = " COMMENT='" . DBA::escape($structure["comment"]) . "'";
 280                 }
 281
 282                 $sql = implode(",\n\t", $sql_rows);
 283
 284                 $sql = sprintf("CREATE TABLE IF NOT EXISTS `%s` (\n\t", DBA::escape($name)) . $sql .
 285                         "\n)" . $engine . " DEFAULT COLLATE utf8mb4_general_ci" . $comment;
 286                 if ($verbose) {
 287                         echo $sql . ";\n";
 288                 }
 289
 290                 if ($action) {
 291                         $r = DBA::e($sql);
 292                 }
 293
 294                 return $r;
 295         }
 296
 297         private static function FieldCommand($parameters, $create = true)
 298         {
 299                 $fieldstruct = $parameters["type"];
 300
 301                 if (isset($parameters["Collation"])) {
 302                         $fieldstruct .= " COLLATE " . $parameters["Collation"];
 303                 }
 304
 305                 if (isset($parameters["not null"])) {
 306                         $fieldstruct .= " NOT NULL";
 307                 }
 308
 309                 if (isset($parameters["default"])) {
 310                         if (strpos(strtolower($parameters["type"]), "int") !== false) {
 311                                 $fieldstruct .= " DEFAULT " . $parameters["default"];
 312                         } else {
 313                                 $fieldstruct .= " DEFAULT '" . $parameters["default"] . "'";
 314                         }
 315                 }
 316                 if (isset($parameters["extra"])) {
 317                         $fieldstruct .= " " . $parameters["extra"];
 318                 }
 319
 320                 if (isset($parameters["comment"])) {
 321                         $fieldstruct .= " COMMENT '" . DBA::escape($parameters["comment"]) . "'";
 322                 }
 323
 324                 /*if (($parameters["primary"] != "") && $create)
 325                         $fieldstruct .= " PRIMARY KEY";*/
 326
 327                 return ($fieldstruct);
 328         }
 329
 330         private static function createIndex($indexname, $fieldnames, $method = "ADD")
 331         {
 332                 $method = strtoupper(trim($method));
 333                 if ($method != "" && $method != "ADD") {
 334                         throw new Exception("Invalid parameter 'method' in self::createIndex(): '$method'");
 335                 }
 336
 337                 if (in_array($fieldnames[0], ["UNIQUE", "FULLTEXT"])) {
 338                         $index_type = array_shift($fieldnames);
 339                         $method .= " " . $index_type;
 340                 }
 341
 342                 $names = "";
 343                 foreach ($fieldnames AS $fieldname) {
 344                         if ($names != "") {
 345                                 $names .= ",";
 346                         }
 347
 348                         if (preg_match('|(.+)\((\d+)\)|', $fieldname, $matches)) {
 349                                 $names .= "`" . DBA::escape($matches[1]) . "`(" . intval($matches[2]) . ")";
 350                         } else {
 351                                 $names .= "`" . DBA::escape($fieldname) . "`";
 352                         }
 353                 }
 354
 355                 if ($indexname == "PRIMARY") {
 356                         return sprintf("%s PRIMARY KEY(%s)", $method, $names);
 357                 }
 358
 359
 360                 $sql = sprintf("%s INDEX `%s` (%s)", $method, DBA::escape($indexname), $names);
 361                 return ($sql);
 362         }
 363
 364         /**
 365          * Perform a database structure dryrun (means: just simulating)
 366          *
 367          * @throws Exception
 368          */
 369         public static function dryRun()
 370         {
 371                 self::update(DI::app()->getBasePath(), true, false);
 372         }
 373
 374         /**
 375          * Updates DB structure and returns eventual errors messages
 376          *
 377          * @param bool $enable_maintenance_mode Set the maintenance mode
 378          * @param bool $verbose                 Display the SQL commands
 379          *
 380          * @return string Empty string if the update is successful, error messages otherwise
 381          * @throws Exception
 382          */
 383         public static function performUpdate(bool $enable_maintenance_mode = true, bool $verbose = false)
 384         {
 385                 if ($enable_maintenance_mode) {
 386                         DI::config()->set('system', 'maintenance', 1);
 387                 }
 388
 389                 $status = self::update(DI::app()->getBasePath(), $verbose, true);
 390
 391                 if ($enable_maintenance_mode) {
 392                         DI::config()->set('system', 'maintenance', 0);
 393                         DI::config()->set('system', 'maintenance_reason', '');
 394                 }
 395
 396                 return $status;
 397         }
 398
 399         /**
 400          * Updates DB structure from the installation and returns eventual errors messages
 401          *
 402          * @param string $basePath   The base path of this application
 403          *
 404          * @return string Empty string if the update is successful, error messages otherwise
 405          * @throws Exception
 406          */
 407         public static function install(string $basePath)
 408         {
 409                 return self::update($basePath, false, true, true);
 410         }
 411
 412         /**
 413          * Updates DB structure and returns eventual errors messages
 414          *
 415          * @param string $basePath   The base path of this application
 416          * @param bool   $verbose
 417          * @param bool   $action     Whether to actually apply the update
 418          * @param bool   $install    Is this the initial update during the installation?
 419          * @param array  $tables     An array of the database tables
 420          * @param array  $definition An array of the definition tables
 421          * @return string Empty string if the update is successful, error messages otherwise
 422          * @throws Exception
 423          */
 424         private static function update($basePath, $verbose, $action, $install = false, array $tables = null, array $definition = null)
 425         {
 426                 $in_maintenance_mode = DI::config()->get('system', 'maintenance');
 427
 428                 if ($action && !$install && self::isUpdating()) {
 429                         return DI::l10n()->t('Another database update is currently running.');
 430                 }
 431
 432                 if ($in_maintenance_mode) {
 433                         DI::config()->set('system', 'maintenance_reason', DI::l10n()->t('%s: Database update', DateTimeFormat::utcNow() . ' ' . date('e')));
 434                 }
 435
 436                 // ensure that all initial values exist. This test has to be done prior and after the structure check.
 437                 // Prior is needed if the specific tables already exists - after is needed when they had been created.
 438                 self::checkInitialValues();
 439
 440                 $errors = '';
 441
 442                 Logger::info('updating structure');
 443
 444                 // Get the current structure
 445                 $database = [];
 446
 447                 if (is_null($tables)) {
 448                         $tables = DBA::toArray(DBA::p("SHOW TABLES"));
 449                 }
 450
 451                 if (DBA::isResult($tables)) {
 452                         foreach ($tables AS $table) {
 453                                 $table = current($table);
 454
 455                                 Logger::info('updating structure', ['table' => $table]);
 456                                 $database[$table] = self::tableStructure($table);
 457                         }
 458                 }
 459
 460                 // Get the definition
 461                 if (is_null($definition)) {
 462                         $definition = self::definition($basePath);
 463                 }
 464
 465                 // MySQL >= 5.7.4 doesn't support the IGNORE keyword in ALTER TABLE statements
 466                 if ((version_compare(DBA::serverInfo(), '5.7.4') >= 0) &&
 467                         !(strpos(DBA::serverInfo(), 'MariaDB') !== false)) {
 468                         $ignore = '';
 469                 } else {
 470                         $ignore = ' IGNORE';
 471                 }
 472
 473                 // Compare it
 474                 foreach ($definition AS $name => $structure) {
 475                         $is_new_table = false;
 476                         $group_by = "";
 477                         $sql3 = "";
 478                         $is_unique = false;
 479                         $temp_name = $name;
 480                         if (!isset($database[$name])) {
 481                                 $r = self::createTable($name, $structure, $verbose, $action);
 482                                 if (!DBA::isResult($r)) {
 483                                         $errors .= self::printUpdateError($name);
 484                                 }
 485                                 $is_new_table = true;
 486                         } else {
 487                                 foreach ($structure["indexes"] AS $indexname => $fieldnames) {
 488                                         if (isset($database[$name]["indexes"][$indexname])) {
 489                                                 $current_index_definition = implode(",", $database[$name]["indexes"][$indexname]);
 490                                         } else {
 491                                                 $current_index_definition = "__NOT_SET__";
 492                                         }
 493                                         $new_index_definition = implode(",", $fieldnames);
 494                                         if ($current_index_definition != $new_index_definition) {
 495                                                 if ($fieldnames[0] == "UNIQUE") {
 496                                                         $is_unique = true;
 497                                                         if ($ignore == "") {
 498                                                                 $temp_name = "temp-" . $name;
 499                                                         }
 500                                                 }
 501                                         }
 502                                 }
 503
 504                                 /*
 505                                  * Drop the index if it isn't present in the definition
 506                                  * or the definition differ from current status
 507                                  * and index name doesn't start with "local_"
 508                                  */
 509                                 foreach ($database[$name]["indexes"] as $indexname => $fieldnames) {
 510                                         $current_index_definition = implode(",", $fieldnames);
 511                                         if (isset($structure["indexes"][$indexname])) {
 512                                                 $new_index_definition = implode(",", $structure["indexes"][$indexname]);
 513                                         } else {
 514                                                 $new_index_definition = "__NOT_SET__";
 515                                         }
 516                                         if ($current_index_definition != $new_index_definition && substr($indexname, 0, 6) != 'local_') {
 517                                                 $sql2 = self::dropIndex($indexname);
 518                                                 if ($sql3 == "") {
 519                                                         $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 520                                                 } else {
 521                                                         $sql3 .= ", " . $sql2;
 522                                                 }
 523                                         }
 524                                 }
 525                                 // Compare the field structure field by field
 526                                 foreach ($structure["fields"] AS $fieldname => $parameters) {
 527                                         if (!isset($database[$name]["fields"][$fieldname])) {
 528                                                 $sql2 = self::addTableField($fieldname, $parameters);
 529                                                 if ($sql3 == "") {
 530                                                         $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 531                                                 } else {
 532                                                         $sql3 .= ", " . $sql2;
 533                                                 }
 534                                         } else {
 535                                                 // Compare the field definition
 536                                                 $field_definition = $database[$name]["fields"][$fieldname];
 537
 538                                                 // Remove the relation data that is used for the referential integrity
 539                                                 unset($parameters['relation']);
 540                                                 unset($parameters['foreign']);
 541
 542                                                 // We change the collation after the indexes had been changed.
 543                                                 // This is done to avoid index length problems.
 544                                                 // So here we always ensure that there is no need to change it.
 545                                                 unset($parameters['Collation']);
 546                                                 unset($field_definition['Collation']);
 547
 548                                                 // Only update the comment when it is defined
 549                                                 if (!isset($parameters['comment'])) {
 550                                                         $parameters['comment'] = "";
 551                                                 }
 552
 553                                                 $current_field_definition = DBA::cleanQuery(implode(",", $field_definition));
 554                                                 $new_field_definition = DBA::cleanQuery(implode(",", $parameters));
 555                                                 if ($current_field_definition != $new_field_definition) {
 556                                                         $sql2 = self::modifyTableField($fieldname, $parameters);
 557                                                         if ($sql3 == "") {
 558                                                                 $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 559                                                         } else {
 560                                                                 $sql3 .= ", " . $sql2;
 561                                                         }
 562                                                 }
 563                                         }
 564                                 }
 565                         }
 566
 567                         /*
 568                          * Create the index if the index don't exists in database
 569                          * or the definition differ from the current status.
 570                          * Don't create keys if table is new
 571                          */
 572                         if (!$is_new_table) {
 573                                 foreach ($structure["indexes"] AS $indexname => $fieldnames) {
 574                                         if (isset($database[$name]["indexes"][$indexname])) {
 575                                                 $current_index_definition = implode(",", $database[$name]["indexes"][$indexname]);
 576                                         } else {
 577                                                 $current_index_definition = "__NOT_SET__";
 578                                         }
 579                                         $new_index_definition = implode(",", $fieldnames);
 580                                         if ($current_index_definition != $new_index_definition) {
 581                                                 $sql2 = self::createIndex($indexname, $fieldnames);
 582
 583                                                 // Fetch the "group by" fields for unique indexes
 584                                                 $group_by = self::groupBy($fieldnames);
 585                                                 if ($sql2 != "") {
 586                                                         if ($sql3 == "") {
 587                                                                 $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 588                                                         } else {
 589                                                                 $sql3 .= ", " . $sql2;
 590                                                         }
 591                                                 }
 592                                         }
 593                                 }
 594
 595                                 $existing_foreign_keys = $database[$name]['foreign_keys'];
 596
 597                                 // Foreign keys
 598                                 // Compare the field structure field by field
 599                                 foreach ($structure["fields"] AS $fieldname => $parameters) {
 600                                         if (empty($parameters['foreign'])) {
 601                                                 continue;
 602                                         }
 603
 604                                         $constraint = self::getConstraintName($name, $fieldname, $parameters);
 605
 606                                         unset($existing_foreign_keys[$constraint]);
 607
 608                                         if (empty($database[$name]['foreign_keys'][$constraint])) {
 609                                                 $sql2 = self::addForeignKey($name, $fieldname, $parameters);
 610
 611                                                 if ($sql3 == "") {
 612                                                         $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 613                                                 } else {
 614                                                         $sql3 .= ", " . $sql2;
 615                                                 }
 616                                         }
 617                                 }
 618
 619                                 foreach ($existing_foreign_keys as $param) {
 620                                         $sql2 = self::dropForeignKey($param['CONSTRAINT_NAME']);
 621
 622                                         if ($sql3 == "") {
 623                                                 $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 624                                         } else {
 625                                                 $sql3 .= ", " . $sql2;
 626                                         }
 627                                 }
 628
 629                                 if (isset($database[$name]["table_status"]["TABLE_COMMENT"])) {
 630                                         $structurecomment = $structure["comment"] ?? '';
 631                                         if ($database[$name]["table_status"]["TABLE_COMMENT"] != $structurecomment) {
 632                                                 $sql2 = "COMMENT = '" . DBA::escape($structurecomment) . "'";
 633
 634                                                 if ($sql3 == "") {
 635                                                         $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 636                                                 } else {
 637                                                         $sql3 .= ", " . $sql2;
 638                                                 }
 639                                         }
 640                                 }
 641
 642                                 if (isset($database[$name]["table_status"]["ENGINE"]) && isset($structure['engine'])) {
 643                                         if ($database[$name]["table_status"]["ENGINE"] != $structure['engine']) {
 644                                                 $sql2 = "ENGINE = '" . DBA::escape($structure['engine']) . "'";
 645
 646                                                 if ($sql3 == "") {
 647                                                         $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 648                                                 } else {
 649                                                         $sql3 .= ", " . $sql2;
 650                                                 }
 651                                         }
 652                                 }
 653
 654                                 if (isset($database[$name]["table_status"]["TABLE_COLLATION"])) {
 655                                         if ($database[$name]["table_status"]["TABLE_COLLATION"] != 'utf8mb4_general_ci') {
 656                                                 $sql2 = "DEFAULT COLLATE utf8mb4_general_ci";
 657
 658                                                 if ($sql3 == "") {
 659                                                         $sql3 = "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 660                                                 } else {
 661                                                         $sql3 .= ", " . $sql2;
 662                                                 }
 663                                         }
 664                                 }
 665
 666                                 if ($sql3 != "") {
 667                                         $sql3 .= "; ";
 668                                 }
 669
 670                                 // Now have a look at the field collations
 671                                 // Compare the field structure field by field
 672                                 foreach ($structure["fields"] AS $fieldname => $parameters) {
 673                                         // Compare the field definition
 674                                         $field_definition = ($database[$name]["fields"][$fieldname] ?? '') ?: ['Collation' => ''];
 675
 676                                         // Define the default collation if not given
 677                                         if (!isset($parameters['Collation']) && !empty($field_definition['Collation'])) {
 678                                                 $parameters['Collation'] = 'utf8mb4_general_ci';
 679                                         } else {
 680                                                 $parameters['Collation'] = null;
 681                                         }
 682
 683                                         if ($field_definition['Collation'] != $parameters['Collation']) {
 684                                                 $sql2 = self::modifyTableField($fieldname, $parameters);
 685                                                 if (($sql3 == "") || (substr($sql3, -2, 2) == "; ")) {
 686                                                         $sql3 .= "ALTER" . $ignore . " TABLE `" . $temp_name . "` " . $sql2;
 687                                                 } else {
 688                                                         $sql3 .= ", " . $sql2;
 689                                                 }
 690                                         }
 691                                 }
 692                         }
 693
 694                         if ($sql3 != "") {
 695                                 if (substr($sql3, -2, 2) != "; ") {
 696                                         $sql3 .= ";";
 697                                 }
 698
 699                                 $field_list = '';
 700                                 if ($is_unique && $ignore == '') {
 701                                         foreach ($database[$name]["fields"] AS $fieldname => $parameters) {
 702                                                 $field_list .= 'ANY_VALUE(`' . $fieldname . '`),';
 703                                         }
 704                                         $field_list = rtrim($field_list, ',');
 705                                 }
 706
 707                                 if ($verbose) {
 708                                         // Ensure index conversion to unique removes duplicates
 709                                         if ($is_unique && ($temp_name != $name)) {
 710                                                 if ($ignore != "") {
 711                                                         echo "SET session old_alter_table=1;\n";
 712                                                 } else {
 713                                                         echo "DROP TABLE IF EXISTS `" . $temp_name . "`;\n";
 714                                                         echo "CREATE TABLE `" . $temp_name . "` LIKE `" . $name . "`;\n";
 715                                                 }
 716                                         }
 717
 718                                         echo $sql3 . "\n";
 719
 720                                         if ($is_unique && ($temp_name != $name)) {
 721                                                 if ($ignore != "") {
 722                                                         echo "SET session old_alter_table=0;\n";
 723                                                 } else {
 724                                                         echo "INSERT INTO `" . $temp_name . "` SELECT " . DBA::anyValueFallback($field_list) . " FROM `" . $name . "`" . $group_by . ";\n";
 725                                                         echo "DROP TABLE `" . $name . "`;\n";
 726                                                         echo "RENAME TABLE `" . $temp_name . "` TO `" . $name . "`;\n";
 727                                                 }
 728                                         }
 729                                 }
 730
 731                                 if ($action) {
 732                                         if ($in_maintenance_mode) {
 733                                                 DI::config()->set('system', 'maintenance_reason', DI::l10n()->t('%s: updating %s table.', DateTimeFormat::utcNow() . ' ' . date('e'), $name));
 734                                         }
 735
 736                                         // Ensure index conversion to unique removes duplicates
 737                                         if ($is_unique && ($temp_name != $name)) {
 738                                                 if ($ignore != "") {
 739                                                         DBA::e("SET session old_alter_table=1;");
 740                                                 } else {
 741                                                         $r = DBA::e("DROP TABLE IF EXISTS `" . $temp_name . "`;");
 742                                                         if (!DBA::isResult($r)) {
 743                                                                 $errors .= self::printUpdateError($sql3);
 744                                                                 return $errors;
 745                                                         }
 746
 747                                                         $r = DBA::e("CREATE TABLE `" . $temp_name . "` LIKE `" . $name . "`;");
 748                                                         if (!DBA::isResult($r)) {
 749                                                                 $errors .= self::printUpdateError($sql3);
 750                                                                 return $errors;
 751                                                         }
 752                                                 }
 753                                         }
 754
 755                                         $r = DBA::e($sql3);
 756                                         if (!DBA::isResult($r)) {
 757                                                 $errors .= self::printUpdateError($sql3);
 758                                         }
 759                                         if ($is_unique && ($temp_name != $name)) {
 760                                                 if ($ignore != "") {
 761                                                         DBA::e("SET session old_alter_table=0;");
 762                                                 } else {
 763                                                         $r = DBA::e("INSERT INTO `" . $temp_name . "` SELECT " . $field_list . " FROM `" . $name . "`" . $group_by . ";");
 764                                                         if (!DBA::isResult($r)) {
 765                                                                 $errors .= self::printUpdateError($sql3);
 766                                                                 return $errors;
 767                                                         }
 768                                                         $r = DBA::e("DROP TABLE `" . $name . "`;");
 769                                                         if (!DBA::isResult($r)) {
 770                                                                 $errors .= self::printUpdateError($sql3);
 771                                                                 return $errors;
 772                                                         }
 773                                                         $r = DBA::e("RENAME TABLE `" . $temp_name . "` TO `" . $name . "`;");
 774                                                         if (!DBA::isResult($r)) {
 775                                                                 $errors .= self::printUpdateError($sql3);
 776                                                                 return $errors;
 777                                                         }
 778                                                 }
 779                                         }
 780                                 }
 781                         }
 782                 }
 783
 784                 View::create(false, $action);
 785
 786                 self::checkInitialValues();
 787
 788                 if ($action && !$install) {
 789                         if ($errors) {
 790                                 DI::config()->set('system', 'dbupdate', self::UPDATE_FAILED);
 791                         } else {
 792                                 DI::config()->set('system', 'dbupdate', self::UPDATE_SUCCESSFUL);
 793                         }
 794                 }
 795
 796                 return $errors;
 797         }
 798
 799         private static function tableStructure($table)
 800         {
 801                 // This query doesn't seem to be executable as a prepared statement
 802                 $indexes = DBA::toArray(DBA::p("SHOW INDEX FROM " . DBA::quoteIdentifier($table)));
 803
 804                 $fields = DBA::selectToArray(['INFORMATION_SCHEMA' => 'COLUMNS'],
 805                         ['COLUMN_NAME', 'COLUMN_TYPE', 'IS_NULLABLE', 'COLUMN_DEFAULT', 'EXTRA',
 806                         'COLUMN_KEY', 'COLLATION_NAME', 'COLUMN_COMMENT'],
 807                         ["`TABLE_SCHEMA` = ? AND `TABLE_NAME` = ?",
 808                         DBA::databaseName(), $table]);
 809
 810                 $foreign_keys = DBA::selectToArray(['INFORMATION_SCHEMA' => 'KEY_COLUMN_USAGE'],
 811                         ['COLUMN_NAME', 'CONSTRAINT_NAME', 'REFERENCED_TABLE_NAME', 'REFERENCED_COLUMN_NAME'],
 812                         ["`TABLE_SCHEMA` = ? AND `TABLE_NAME` = ? AND `REFERENCED_TABLE_SCHEMA` IS NOT NULL",
 813                         DBA::databaseName(), $table]);
 814
 815                 $table_status = DBA::selectFirst(['INFORMATION_SCHEMA' => 'TABLES'],
 816                         ['ENGINE', 'TABLE_COLLATION', 'TABLE_COMMENT'],
 817                         ["`TABLE_SCHEMA` = ? AND `TABLE_NAME` = ?",
 818                         DBA::databaseName(), $table]);
 819
 820                 $fielddata = [];
 821                 $indexdata = [];
 822                 $foreigndata = [];
 823
 824                 if (DBA::isResult($foreign_keys)) {
 825                         foreach ($foreign_keys as $foreign_key) {
 826                                 $parameters = ['foreign' => [$foreign_key['REFERENCED_TABLE_NAME'] => $foreign_key['REFERENCED_COLUMN_NAME']]];
 827                                 $constraint = self::getConstraintName($table, $foreign_key['COLUMN_NAME'], $parameters);
 828                                 $foreigndata[$constraint] = $foreign_key;
 829                         }
 830                 }
 831
 832                 if (DBA::isResult($indexes)) {
 833                         foreach ($indexes AS $index) {
 834                                 if ($index["Key_name"] != "PRIMARY" && $index["Non_unique"] == "0" && !isset($indexdata[$index["Key_name"]])) {
 835                                         $indexdata[$index["Key_name"]] = ["UNIQUE"];
 836                                 }
 837
 838                                 if ($index["Index_type"] == "FULLTEXT" && !isset($indexdata[$index["Key_name"]])) {
 839                                         $indexdata[$index["Key_name"]] = ["FULLTEXT"];
 840                                 }
 841
 842                                 $column = $index["Column_name"];
 843
 844                                 if ($index["Sub_part"] != "") {
 845                                         $column .= "(" . $index["Sub_part"] . ")";
 846                                 }
 847
 848                                 $indexdata[$index["Key_name"]][] = $column;
 849                         }
 850                 }
 851
 852                 $fielddata = [];
 853                 if (DBA::isResult($fields)) {
 854                         foreach ($fields AS $field) {
 855                                 $search = ['tinyint(1)', 'tinyint(3) unsigned', 'tinyint(4)', 'smallint(5) unsigned', 'smallint(6)', 'mediumint(8) unsigned', 'mediumint(9)', 'bigint(20)', 'int(10) unsigned', 'int(11)'];
 856                                 $replace = ['boolean', 'tinyint unsigned', 'tinyint', 'smallint unsigned', 'smallint', 'mediumint unsigned', 'mediumint', 'bigint', 'int unsigned', 'int'];
 857                                 $field['COLUMN_TYPE'] = str_replace($search, $replace, $field['COLUMN_TYPE']);
 858
 859                                 $fielddata[$field['COLUMN_NAME']]['type'] = $field['COLUMN_TYPE'];
 860
 861                                 if ($field['IS_NULLABLE'] == 'NO') {
 862                                         $fielddata[$field['COLUMN_NAME']]['not null'] = true;
 863                                 }
 864
 865                                 if (isset($field['COLUMN_DEFAULT']) && ($field['COLUMN_DEFAULT'] != 'NULL')) {
 866                                         $fielddata[$field['COLUMN_NAME']]['default'] = trim($field['COLUMN_DEFAULT'], "'");
 867                                 }
 868
 869                                 if (!empty($field['EXTRA'])) {
 870                                         $fielddata[$field['COLUMN_NAME']]['extra'] = $field['EXTRA'];
 871                                 }
 872
 873                                 if ($field['COLUMN_KEY'] == 'PRI') {
 874                                         $fielddata[$field['COLUMN_NAME']]['primary'] = true;
 875                                 }
 876
 877                                 $fielddata[$field['COLUMN_NAME']]['Collation'] = $field['COLLATION_NAME'];
 878                                 $fielddata[$field['COLUMN_NAME']]['comment'] = $field['COLUMN_COMMENT'];
 879                         }
 880                 }
 881
 882                 return ["fields" => $fielddata, "indexes" => $indexdata,
 883                         "foreign_keys" => $foreigndata, "table_status" => $table_status];
 884         }
 885
 886         private static function dropIndex($indexname)
 887         {
 888                 $sql = sprintf("DROP INDEX `%s`", DBA::escape($indexname));
 889                 return ($sql);
 890         }
 891
 892         private static function addTableField($fieldname, $parameters)
 893         {
 894                 $sql = sprintf("ADD `%s` %s", DBA::escape($fieldname), self::FieldCommand($parameters));
 895                 return ($sql);
 896         }
 897
 898         private static function modifyTableField($fieldname, $parameters)
 899         {
 900                 $sql = sprintf("MODIFY `%s` %s", DBA::escape($fieldname), self::FieldCommand($parameters, false));
 901                 return ($sql);
 902         }
 903
 904         private static function getConstraintName(string $tablename, string $fieldname, array $parameters)
 905         {
 906                 $foreign_table = array_keys($parameters['foreign'])[0];
 907                 $foreign_field = array_values($parameters['foreign'])[0];
 908
 909                 return $tablename . "-" . $fieldname. "-" . $foreign_table. "-" . $foreign_field;
 910         }
 911
 912         private static function foreignCommand(string $tablename, string $fieldname, array $parameters) {
 913                 $foreign_table = array_keys($parameters['foreign'])[0];
 914                 $foreign_field = array_values($parameters['foreign'])[0];
 915
 916                 $sql = "FOREIGN KEY (`" . $fieldname . "`) REFERENCES `" . $foreign_table . "` (`" . $foreign_field . "`)";
 917
 918                 if (!empty($parameters['foreign']['on update'])) {
 919                         $sql .= " ON UPDATE " . strtoupper($parameters['foreign']['on update']);
 920                 } else {
 921                         $sql .= " ON UPDATE RESTRICT";
 922                 }
 923
 924                 if (!empty($parameters['foreign']['on delete'])) {
 925                         $sql .= " ON DELETE " . strtoupper($parameters['foreign']['on delete']);
 926                 } else {
 927                         $sql .= " ON DELETE CASCADE";
 928                 }
 929
 930                 return $sql;
 931         }
 932
 933         private static function addForeignKey(string $tablename, string $fieldname, array $parameters)
 934         {
 935                 return sprintf("ADD %s", self::foreignCommand($tablename, $fieldname, $parameters));
 936         }
 937
 938         private static function dropForeignKey(string $constraint)
 939         {
 940                 return sprintf("DROP FOREIGN KEY `%s`", $constraint);
 941         }
 942
 943         /**
 944          * Constructs a GROUP BY clause from a UNIQUE index definition.
 945          *
 946          * @param array $fieldnames
 947          * @return string
 948          */
 949         private static function groupBy(array $fieldnames)
 950         {
 951                 if ($fieldnames[0] != "UNIQUE") {
 952                         return "";
 953                 }
 954
 955                 array_shift($fieldnames);
 956
 957                 $names = "";
 958                 foreach ($fieldnames AS $fieldname) {
 959                         if ($names != "") {
 960                                 $names .= ",";
 961                         }
 962
 963                         if (preg_match('|(.+)\((\d+)\)|', $fieldname, $matches)) {
 964                                 $names .= "`" . DBA::escape($matches[1]) . "`";
 965                         } else {
 966                                 $names .= "`" . DBA::escape($fieldname) . "`";
 967                         }
 968                 }
 969
 970                 $sql = sprintf(" GROUP BY %s", $names);
 971                 return $sql;
 972         }
 973
 974         /**
 975          * Renames columns or the primary key of a table
 976          *
 977          * @todo You cannot rename a primary key if "auto increment" is set
 978          *
 979          * @param string $table            Table name
 980          * @param array  $columns          Columns Syntax for Rename: [ $old1 => [ $new1, $type1 ], $old2 => [ $new2, $type2 ], ... ]
 981          *                                 Syntax for Primary Key: [ $col1, $col2, ...]
 982          * @param int    $type             The type of renaming (Default is Column)
 983          *
 984          * @return boolean Was the renaming successful?
 985          * @throws Exception
 986          */
 987         public static function rename($table, $columns, $type = self::RENAME_COLUMN)
 988         {
 989                 if (empty($table) || empty($columns)) {
 990                         return false;
 991                 }
 992
 993                 if (!is_array($columns)) {
 994                         return false;
 995                 }
 996
 997                 $table = DBA::escape($table);
 998
 999                 $sql = "ALTER TABLE `" . $table . "`";
1000                 switch ($type) {
1001                         case self::RENAME_COLUMN:
1002                                 if (!self::existsColumn($table, array_keys($columns))) {
1003                                         return false;
1004                                 }
1005                                 $sql .= implode(',', array_map(
1006                                         function ($to, $from) {
1007                                                 return " CHANGE `" . $from . "` `" . $to[0] . "` " . $to[1];
1008                                         },
1009                                         $columns,
1010                                         array_keys($columns)
1011                                 ));
1012                                 break;
1013                         case self::RENAME_PRIMARY_KEY:
1014                                 if (!self::existsColumn($table, $columns)) {
1015                                         return false;
1016                                 }
1017                                 $sql .= " DROP PRIMARY KEY, ADD PRIMARY KEY(`" . implode('`, `', $columns) . "`)";
1018                                 break;
1019                         default:
1020                                 return false;
1021                 }
1022
1023                 $sql .= ";";
1024
1025                 $stmt = DBA::p($sql);
1026
1027                 if (is_bool($stmt)) {
1028                         $retval = $stmt;
1029                 } else {
1030                         $retval = true;
1031                 }
1032
1033                 DBA::close($stmt);
1034
1035                 return $retval;
1036         }
1037
1038         /**
1039          *    Check if the columns of the table exists
1040          *
1041          * @param string $table   Table name
1042          * @param array  $columns Columns to check ( Syntax: [ $col1, $col2, .. ] )
1043          *
1044          * @return boolean Does the table exist?
1045          * @throws Exception
1046          */
1047         public static function existsColumn($table, $columns = [])
1048         {
1049                 if (empty($table)) {
1050                         return false;
1051                 }
1052
1053                 if (is_null($columns) || empty($columns)) {
1054                         return self::existsTable($table);
1055                 }
1056
1057                 $table = DBA::escape($table);
1058
1059                 foreach ($columns AS $column) {
1060                         $sql = "SHOW COLUMNS FROM `" . $table . "` LIKE '" . $column . "';";
1061
1062                         $stmt = DBA::p($sql);
1063
1064                         if (is_bool($stmt)) {
1065                                 $retval = $stmt;
1066                         } else {
1067                                 $retval = (DBA::numRows($stmt) > 0);
1068                         }
1069
1070                         DBA::close($stmt);
1071
1072                         if (!$retval) {
1073                                 return false;
1074                         }
1075                 }
1076
1077                 return true;
1078         }
1079
1080         /**
1081          * Check if a foreign key exists for the given table field
1082          *
1083          * @param string $table
1084          * @param string $field
1085          * @return boolean
1086          */
1087         public static function existsForeignKeyForField(string $table, string $field)
1088         {
1089                 return DBA::exists(['INFORMATION_SCHEMA' => 'KEY_COLUMN_USAGE'],
1090                         ["`TABLE_SCHEMA` = ? AND `TABLE_NAME` = ? AND `COLUMN_NAME` = ? AND `REFERENCED_TABLE_SCHEMA` IS NOT NULL",
1091                         DBA::databaseName(), $table, $field]);
1092         }
1093         /**
1094          *    Check if a table exists
1095          *
1096          * @param string|array $table Table name
1097          *
1098          * @return boolean Does the table exist?
1099          * @throws Exception
1100          */
1101         public static function existsTable($table)
1102         {
1103                 if (empty($table)) {
1104                         return false;
1105                 }
1106
1107                 if (is_array($table)) {
1108                         $condition = ['table_schema' => key($table), 'table_name' => current($table)];
1109                 } else {
1110                         $condition = ['table_schema' => DBA::databaseName(), 'table_name' => $table];
1111                 }
1112
1113                 $result = DBA::exists(['information_schema' => 'tables'], $condition);
1114
1115                 return $result;
1116         }
1117
1118         /**
1119          * Returns the columns of a table
1120          *
1121          * @param string $table Table name
1122          *
1123          * @return array An array of the table columns
1124          * @throws Exception
1125          */
1126         public static function getColumns($table)
1127         {
1128                 $stmtColumns = DBA::p("SHOW COLUMNS FROM `" . $table . "`");
1129                 return DBA::toArray($stmtColumns);
1130         }
1131
1132         /**
1133          * Check if initial database values do exist - or create them
1134          */
1135         public static function checkInitialValues(bool $verbose = false)
1136         {
1137                 if (self::existsTable('verb')) {
1138                         if (!DBA::exists('verb', ['id' => 1])) {
1139                                 foreach (Item::ACTIVITIES as $index => $activity) {
1140                                         DBA::insert('verb', ['id' => $index + 1, 'name' => $activity], Database::INSERT_IGNORE);
1141                                 }
1142                                 if ($verbose) {
1143                                         echo "verb: activities added\n";
1144                                 }
1145                         } elseif ($verbose) {
1146                                 echo "verb: activities already added\n";
1147                         }
1148
1149                         if (!DBA::exists('verb', ['id' => 0])) {
1150                                 DBA::insert('verb', ['name' => '']);
1151                                 $lastid = DBA::lastInsertId();
1152                                 if ($lastid != 0) {
1153                                         DBA::update('verb', ['id' => 0], ['id' => $lastid]);
1154                                         if ($verbose) {
1155                                                 echo "Zero verb added\n";
1156                                         }
1157                                 }
1158                         } elseif ($verbose) {
1159                                 echo "Zero verb already added\n";
1160                         }
1161                 } elseif ($verbose) {
1162                         echo "verb: Table not found\n";
1163                 }
1164
1165                 if (self::existsTable('user') && !DBA::exists('user', ['uid' => 0])) {
1166                         $user = [
1167                                 "verified" => true,
1168                                 "page-flags" => User::PAGE_FLAGS_SOAPBOX,
1169                                 "account-type" => User::ACCOUNT_TYPE_RELAY,
1170                         ];
1171                         DBA::insert('user', $user);
1172                         $lastid = DBA::lastInsertId();
1173                         if ($lastid != 0) {
1174                                 DBA::update('user', ['uid' => 0], ['uid' => $lastid]);
1175                                 if ($verbose) {
1176                                         echo "Zero user added\n";
1177                                 }
1178                         }
1179                 } elseif (self::existsTable('user') && $verbose) {
1180                         echo "Zero user already added\n";
1181                 } elseif ($verbose) {
1182                         echo "user: Table not found\n";
1183                 }
1184
1185                 if (self::existsTable('contact') && !DBA::exists('contact', ['id' => 0])) {
1186                         DBA::insert('contact', ['nurl' => '']);
1187                         $lastid = DBA::lastInsertId();
1188                         if ($lastid != 0) {
1189                                 DBA::update('contact', ['id' => 0], ['id' => $lastid]);
1190                                 if ($verbose) {
1191                                         echo "Zero contact added\n";
1192                                 }
1193                         }
1194                 } elseif (self::existsTable('contact') && $verbose) {
1195                         echo "Zero contact already added\n";
1196                 } elseif ($verbose) {
1197                         echo "contact: Table not found\n";
1198                 }
1199
1200                 if (self::existsTable('tag') && !DBA::exists('tag', ['id' => 0])) {
1201                         DBA::insert('tag', ['name' => '']);
1202                         $lastid = DBA::lastInsertId();
1203                         if ($lastid != 0) {
1204                                 DBA::update('tag', ['id' => 0], ['id' => $lastid]);
1205                                 if ($verbose) {
1206                                         echo "Zero tag added\n";
1207                                 }
1208                         }
1209                 } elseif (self::existsTable('tag') && $verbose) {
1210                         echo "Zero tag already added\n";
1211                 } elseif ($verbose) {
1212                         echo "tag: Table not found\n";
1213                 }
1214
1215                 if (self::existsTable('permissionset')) {
1216                         if (!DBA::exists('permissionset', ['id' => 0])) {
1217                                 DBA::insert('permissionset', ['allow_cid' => '', 'allow_gid' => '', 'deny_cid' => '', 'deny_gid' => '']);
1218                                 $lastid = DBA::lastInsertId();
1219                                 if ($lastid != 0) {
1220                                         DBA::update('permissionset', ['id' => 0], ['id' => $lastid]);
1221                                         if ($verbose) {
1222                                                 echo "Zero permissionset added\n";
1223                                         }
1224                                 }
1225                         } elseif ($verbose) {
1226                                 echo "Zero permissionset already added\n";
1227                         }
1228                         if (!self::existsForeignKeyForField('item', 'psid')) {
1229                                 $sets = DBA::p("SELECT `psid`, `item`.`uid`, `item`.`private` FROM `item`
1230                                         LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`
1231                                         WHERE `permissionset`.`id` IS NULL AND NOT `psid` IS NULL");
1232                                 while ($set = DBA::fetch($sets)) {
1233                                         if (($set['private'] == Item::PRIVATE) && ($set['uid'] != 0)) {
1234                                                 $owner = User::getOwnerDataById($set['uid']);
1235                                                 if ($owner) {
1236                                                         $permission = '<' . $owner['id'] . '>';
1237                                                 } else {
1238                                                         $permission = '<>';
1239                                                 }
1240                                         } else {
1241                                                 $permission = '';
1242                                         }
1243                                         $fields = ['id' => $set['psid'], 'uid' => $set['uid'], 'allow_cid' => $permission,
1244                                                 'allow_gid' => '', 'deny_cid' => '', 'deny_gid' => ''];
1245                                         DBA::insert('permissionset', $fields);
1246                                 }
1247                                 DBA::close($sets);
1248                         }
1249                 } elseif ($verbose) {
1250                         echo "permissionset: Table not found\n";
1251                 }
1252
1253                 if (!self::existsForeignKeyForField('tokens', 'client_id')) {
1254                         $tokens = DBA::p("SELECT `tokens`.`id` FROM `tokens`
1255                                 LEFT JOIN `clients` ON `clients`.`client_id` = `tokens`.`client_id`
1256                                 WHERE `clients`.`client_id` IS NULL");
1257                         while ($token = DBA::fetch($tokens)) {
1258                                 DBA::delete('tokens', ['id' => $token['id']]);
1259                         }
1260                         DBA::close($tokens);
1261                 }
1262         }
1263
1264         /**
1265          * Checks if a database update is currently running
1266          *
1267          * @return boolean
1268          */
1269         private static function isUpdating()
1270         {
1271                 $isUpdate = false;
1272
1273                 $processes = DBA::select(['information_schema' => 'processlist'], ['info'],
1274                         ['db' => DBA::databaseName(), 'command' => ['Query', 'Execute']]);
1275
1276                 while ($process = DBA::fetch($processes)) {
1277                         $parts = explode(' ', $process['info']);
1278                         if (in_array(strtolower(array_shift($parts)), ['alter', 'create', 'drop', 'rename'])) {
1279                                 $isUpdate = true;
1280                         }
1281                 }
1282
1283                 DBA::close($processes);
1284
1285                 return $isUpdate;
1286         }
1287 }