includes/filerepo/file/LocalFile.php

   1 <?php
   2 /**
   3  * Local file in the wiki's own database.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup FileAbstraction
  22  */
  23
  24 /**
  25  * Bump this number when serialized cache records may be incompatible.
  26  */
  27 define( 'MW_FILE_VERSION', 9 );
  28
  29 /**
  30  * Class to represent a local file in the wiki's own database
  31  *
  32  * Provides methods to retrieve paths (physical, logical, URL),
  33  * to generate image thumbnails or for uploading.
  34  *
  35  * Note that only the repo object knows what its file class is called. You should
  36  * never name a file class explictly outside of the repo class. Instead use the
  37  * repo's factory functions to generate file objects, for example:
  38  *
  39  * RepoGroup::singleton()->getLocalRepo()->newFile( $title );
  40  *
  41  * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
  42  * in most cases.
  43  *
  44  * @ingroup FileAbstraction
  45  */
  46 class LocalFile extends File {
  47         const CACHE_FIELD_MAX_LEN = 1000;
  48
  49         /** @var bool Does the file exist on disk? (loadFromXxx) */
  50         protected $fileExists;
  51
  52         /** @var int Image width */
  53         protected $width;
  54
  55         /** @var int Image height */
  56         protected $height;
  57
  58         /** @var int Returned by getimagesize (loadFromXxx) */
  59         protected $bits;
  60
  61         /** @var string MEDIATYPE_xxx (bitmap, drawing, audio...) */
  62         protected $media_type;
  63
  64         /** @var string MIME type, determined by MimeMagic::guessMimeType */
  65         protected $mime;
  66
  67         /** @var int Size in bytes (loadFromXxx) */
  68         protected $size;
  69
  70         /** @var string Handler-specific metadata */
  71         protected $metadata;
  72
  73         /** @var string SHA-1 base 36 content hash */
  74         protected $sha1;
  75
  76         /** @var bool Whether or not core data has been loaded from the database (loadFromXxx) */
  77         protected $dataLoaded;
  78
  79         /** @var bool Whether or not lazy-loaded data has been loaded from the database */
  80         protected $extraDataLoaded;
  81
  82         /** @var int Bitfield akin to rev_deleted */
  83         protected $deleted;
  84
  85         /** @var string */
  86         protected $repoClass = 'LocalRepo';
  87
  88         /** @var int Number of line to return by nextHistoryLine() (constructor) */
  89         private $historyLine;
  90
  91         /** @var int Result of the query for the file's history (nextHistoryLine) */
  92         private $historyRes;
  93
  94         /** @var string Major MIME type */
  95         private $major_mime;
  96
  97         /** @var string Minor MIME type */
  98         private $minor_mime;
  99
 100         /** @var string Upload timestamp */
 101         private $timestamp;
 102
 103         /** @var int User ID of uploader */
 104         private $user;
 105
 106         /** @var string User name of uploader */
 107         private $user_text;
 108
 109         /** @var string Description of current revision of the file */
 110         private $description;
 111
 112         /** @var string TS_MW timestamp of the last change of the file description */
 113         private $descriptionTouched;
 114
 115         /** @var bool Whether the row was upgraded on load */
 116         private $upgraded;
 117
 118         /** @var bool True if the image row is locked */
 119         private $locked;
 120
 121         /** @var bool True if the image row is locked with a lock initiated transaction */
 122         private $lockedOwnTrx;
 123
 124         /** @var bool True if file is not present in file system. Not to be cached in memcached */
 125         private $missing;
 126
 127         // @note: higher than IDBAccessObject constants
 128         const LOAD_ALL = 16; // integer; load all the lazy fields too (like metadata)
 129
 130         /**
 131          * Create a LocalFile from a title
 132          * Do not call this except from inside a repo class.
 133          *
 134          * Note: $unused param is only here to avoid an E_STRICT
 135          *
 136          * @param Title $title
 137          * @param FileRepo $repo
 138          * @param null $unused
 139          *
 140          * @return LocalFile
 141          */
 142         static function newFromTitle( $title, $repo, $unused = null ) {
 143                 return new self( $title, $repo );
 144         }
 145
 146         /**
 147          * Create a LocalFile from a title
 148          * Do not call this except from inside a repo class.
 149          *
 150          * @param stdClass $row
 151          * @param FileRepo $repo
 152          *
 153          * @return LocalFile
 154          */
 155         static function newFromRow( $row, $repo ) {
 156                 $title = Title::makeTitle( NS_FILE, $row->img_name );
 157                 $file = new self( $title, $repo );
 158                 $file->loadFromRow( $row );
 159
 160                 return $file;
 161         }
 162
 163         /**
 164          * Create a LocalFile from a SHA-1 key
 165          * Do not call this except from inside a repo class.
 166          *
 167          * @param string $sha1 Base-36 SHA-1
 168          * @param LocalRepo $repo
 169          * @param string|bool $timestamp MW_timestamp (optional)
 170          * @return bool|LocalFile
 171          */
 172         static function newFromKey( $sha1, $repo, $timestamp = false ) {
 173                 $dbr = $repo->getSlaveDB();
 174
 175                 $conds = [ 'img_sha1' => $sha1 ];
 176                 if ( $timestamp ) {
 177                         $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
 178                 }
 179
 180                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
 181                 if ( $row ) {
 182                         return self::newFromRow( $row, $repo );
 183                 } else {
 184                         return false;
 185                 }
 186         }
 187
 188         /**
 189          * Fields in the image table
 190          * @return array
 191          */
 192         static function selectFields() {
 193                 return [
 194                         'img_name',
 195                         'img_size',
 196                         'img_width',
 197                         'img_height',
 198                         'img_metadata',
 199                         'img_bits',
 200                         'img_media_type',
 201                         'img_major_mime',
 202                         'img_minor_mime',
 203                         'img_description',
 204                         'img_user',
 205                         'img_user_text',
 206                         'img_timestamp',
 207                         'img_sha1',
 208                 ];
 209         }
 210
 211         /**
 212          * Constructor.
 213          * Do not call this except from inside a repo class.
 214          * @param Title $title
 215          * @param FileRepo $repo
 216          */
 217         function __construct( $title, $repo ) {
 218                 parent::__construct( $title, $repo );
 219
 220                 $this->metadata = '';
 221                 $this->historyLine = 0;
 222                 $this->historyRes = null;
 223                 $this->dataLoaded = false;
 224                 $this->extraDataLoaded = false;
 225
 226                 $this->assertRepoDefined();
 227                 $this->assertTitleDefined();
 228         }
 229
 230         /**
 231          * Get the memcached key for the main data for this file, or false if
 232          * there is no access to the shared cache.
 233          * @return string|bool
 234          */
 235         function getCacheKey() {
 236                 $hashedName = md5( $this->getName() );
 237
 238                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 239         }
 240
 241         /**
 242          * Try to load file metadata from memcached. Returns true on success.
 243          * @return bool
 244          */
 245         private function loadFromCache() {
 246                 $this->dataLoaded = false;
 247                 $this->extraDataLoaded = false;
 248                 $key = $this->getCacheKey();
 249
 250                 if ( !$key ) {
 251                         return false;
 252                 }
 253
 254                 $cache = ObjectCache::getMainWANInstance();
 255                 $cachedValues = $cache->get( $key );
 256
 257                 // Check if the key existed and belongs to this version of MediaWiki
 258                 if ( is_array( $cachedValues ) && $cachedValues['version'] == MW_FILE_VERSION ) {
 259                         $this->fileExists = $cachedValues['fileExists'];
 260                         if ( $this->fileExists ) {
 261                                 $this->setProps( $cachedValues );
 262                         }
 263                         $this->dataLoaded = true;
 264                         $this->extraDataLoaded = true;
 265                         foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 266                                 $this->extraDataLoaded = $this->extraDataLoaded && isset( $cachedValues[$field] );
 267                         }
 268                 }
 269
 270                 return $this->dataLoaded;
 271         }
 272
 273         /**
 274          * Save the file metadata to memcached
 275          */
 276         private function saveToCache() {
 277                 $this->load();
 278
 279                 $key = $this->getCacheKey();
 280                 if ( !$key ) {
 281                         return;
 282                 }
 283
 284                 $fields = $this->getCacheFields( '' );
 285                 $cacheVal = [ 'version' => MW_FILE_VERSION ];
 286                 $cacheVal['fileExists'] = $this->fileExists;
 287
 288                 if ( $this->fileExists ) {
 289                         foreach ( $fields as $field ) {
 290                                 $cacheVal[$field] = $this->$field;
 291                         }
 292                 }
 293
 294                 // Strip off excessive entries from the subset of fields that can become large.
 295                 // If the cache value gets to large it will not fit in memcached and nothing will
 296                 // get cached at all, causing master queries for any file access.
 297                 foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 298                         if ( isset( $cacheVal[$field] ) && strlen( $cacheVal[$field] ) > 100 * 1024 ) {
 299                                 unset( $cacheVal[$field] ); // don't let the value get too big
 300                         }
 301                 }
 302
 303                 // Cache presence for 1 week and negatives for 1 day
 304                 $ttl = $this->fileExists ? 86400 * 7 : 86400;
 305                 $opts = Database::getCacheSetOptions( $this->repo->getSlaveDB() );
 306                 ObjectCache::getMainWANInstance()->set( $key, $cacheVal, $ttl, $opts );
 307         }
 308
 309         /**
 310          * Purge the file object/metadata cache
 311          */
 312         public function invalidateCache() {
 313                 $key = $this->getCacheKey();
 314                 if ( !$key ) {
 315                         return;
 316                 }
 317
 318                 $this->repo->getMasterDB()->onTransactionPreCommitOrIdle( function() use ( $key ) {
 319                         ObjectCache::getMainWANInstance()->delete( $key );
 320                 } );
 321         }
 322
 323         /**
 324          * Load metadata from the file itself
 325          */
 326         function loadFromFile() {
 327                 $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 328                 $this->setProps( $props );
 329         }
 330
 331         /**
 332          * @param string $prefix
 333          * @return array
 334          */
 335         function getCacheFields( $prefix = 'img_' ) {
 336                 static $fields = [ 'size', 'width', 'height', 'bits', 'media_type',
 337                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user',
 338                         'user_text', 'description' ];
 339                 static $results = [];
 340
 341                 if ( $prefix == '' ) {
 342                         return $fields;
 343                 }
 344
 345                 if ( !isset( $results[$prefix] ) ) {
 346                         $prefixedFields = [];
 347                         foreach ( $fields as $field ) {
 348                                 $prefixedFields[] = $prefix . $field;
 349                         }
 350                         $results[$prefix] = $prefixedFields;
 351                 }
 352
 353                 return $results[$prefix];
 354         }
 355
 356         /**
 357          * @param string $prefix
 358          * @return array
 359          */
 360         function getLazyCacheFields( $prefix = 'img_' ) {
 361                 static $fields = [ 'metadata' ];
 362                 static $results = [];
 363
 364                 if ( $prefix == '' ) {
 365                         return $fields;
 366                 }
 367
 368                 if ( !isset( $results[$prefix] ) ) {
 369                         $prefixedFields = [];
 370                         foreach ( $fields as $field ) {
 371                                 $prefixedFields[] = $prefix . $field;
 372                         }
 373                         $results[$prefix] = $prefixedFields;
 374                 }
 375
 376                 return $results[$prefix];
 377         }
 378
 379         /**
 380          * Load file metadata from the DB
 381          * @param int $flags
 382          */
 383         function loadFromDB( $flags = 0 ) {
 384                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 385
 386                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 387                 $this->dataLoaded = true;
 388                 $this->extraDataLoaded = true;
 389
 390                 $dbr = ( $flags & self::READ_LATEST )
 391                         ? $this->repo->getMasterDB()
 392                         : $this->repo->getSlaveDB();
 393
 394                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 395                         [ 'img_name' => $this->getName() ], $fname );
 396
 397                 if ( $row ) {
 398                         $this->loadFromRow( $row );
 399                 } else {
 400                         $this->fileExists = false;
 401                 }
 402         }
 403
 404         /**
 405          * Load lazy file metadata from the DB.
 406          * This covers fields that are sometimes not cached.
 407          */
 408         protected function loadExtraFromDB() {
 409                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 410
 411                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 412                 $this->extraDataLoaded = true;
 413
 414                 $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getSlaveDB(), $fname );
 415                 if ( !$fieldMap ) {
 416                         $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getMasterDB(), $fname );
 417                 }
 418
 419                 if ( $fieldMap ) {
 420                         foreach ( $fieldMap as $name => $value ) {
 421                                 $this->$name = $value;
 422                         }
 423                 } else {
 424                         throw new MWException( "Could not find data for image '{$this->getName()}'." );
 425                 }
 426         }
 427
 428         /**
 429          * @param IDatabase $dbr
 430          * @param string $fname
 431          * @return array|bool
 432          */
 433         private function loadFieldsWithTimestamp( $dbr, $fname ) {
 434                 $fieldMap = false;
 435
 436                 $row = $dbr->selectRow( 'image', $this->getLazyCacheFields( 'img_' ),
 437                         [ 'img_name' => $this->getName(), 'img_timestamp' => $this->getTimestamp() ],
 438                         $fname );
 439                 if ( $row ) {
 440                         $fieldMap = $this->unprefixRow( $row, 'img_' );
 441                 } else {
 442                         # File may have been uploaded over in the meantime; check the old versions
 443                         $row = $dbr->selectRow( 'oldimage', $this->getLazyCacheFields( 'oi_' ),
 444                                 [ 'oi_name' => $this->getName(), 'oi_timestamp' => $this->getTimestamp() ],
 445                                 $fname );
 446                         if ( $row ) {
 447                                 $fieldMap = $this->unprefixRow( $row, 'oi_' );
 448                         }
 449                 }
 450
 451                 return $fieldMap;
 452         }
 453
 454         /**
 455          * @param array|object $row
 456          * @param string $prefix
 457          * @throws MWException
 458          * @return array
 459          */
 460         protected function unprefixRow( $row, $prefix = 'img_' ) {
 461                 $array = (array)$row;
 462                 $prefixLength = strlen( $prefix );
 463
 464                 // Sanity check prefix once
 465                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 466                         throw new MWException( __METHOD__ . ': incorrect $prefix parameter' );
 467                 }
 468
 469                 $decoded = [];
 470                 foreach ( $array as $name => $value ) {
 471                         $decoded[substr( $name, $prefixLength )] = $value;
 472                 }
 473
 474                 return $decoded;
 475         }
 476
 477         /**
 478          * Decode a row from the database (either object or array) to an array
 479          * with timestamps and MIME types decoded, and the field prefix removed.
 480          * @param object $row
 481          * @param string $prefix
 482          * @throws MWException
 483          * @return array
 484          */
 485         function decodeRow( $row, $prefix = 'img_' ) {
 486                 $decoded = $this->unprefixRow( $row, $prefix );
 487
 488                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 489
 490                 $decoded['metadata'] = $this->repo->getSlaveDB()->decodeBlob( $decoded['metadata'] );
 491
 492                 if ( empty( $decoded['major_mime'] ) ) {
 493                         $decoded['mime'] = 'unknown/unknown';
 494                 } else {
 495                         if ( !$decoded['minor_mime'] ) {
 496                                 $decoded['minor_mime'] = 'unknown';
 497                         }
 498                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 499                 }
 500
 501                 // Trim zero padding from char/binary field
 502                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 503
 504                 // Normalize some fields to integer type, per their database definition.
 505                 // Use unary + so that overflows will be upgraded to double instead of
 506                 // being trucated as with intval(). This is important to allow >2GB
 507                 // files on 32-bit systems.
 508                 foreach ( [ 'size', 'width', 'height', 'bits' ] as $field ) {
 509                         $decoded[$field] = +$decoded[$field];
 510                 }
 511
 512                 return $decoded;
 513         }
 514
 515         /**
 516          * Load file metadata from a DB result row
 517          *
 518          * @param object $row
 519          * @param string $prefix
 520          */
 521         function loadFromRow( $row, $prefix = 'img_' ) {
 522                 $this->dataLoaded = true;
 523                 $this->extraDataLoaded = true;
 524
 525                 $array = $this->decodeRow( $row, $prefix );
 526
 527                 foreach ( $array as $name => $value ) {
 528                         $this->$name = $value;
 529                 }
 530
 531                 $this->fileExists = true;
 532                 $this->maybeUpgradeRow();
 533         }
 534
 535         /**
 536          * Load file metadata from cache or DB, unless already loaded
 537          * @param int $flags
 538          */
 539         function load( $flags = 0 ) {
 540                 if ( !$this->dataLoaded ) {
 541                         if ( ( $flags & self::READ_LATEST ) || !$this->loadFromCache() ) {
 542                                 $this->loadFromDB( $flags );
 543                                 $this->saveToCache();
 544                         }
 545                         $this->dataLoaded = true;
 546                 }
 547                 if ( ( $flags & self::LOAD_ALL ) && !$this->extraDataLoaded ) {
 548                         // @note: loads on name/timestamp to reduce race condition problems
 549                         $this->loadExtraFromDB();
 550                 }
 551         }
 552
 553         /**
 554          * Upgrade a row if it needs it
 555          */
 556         function maybeUpgradeRow() {
 557                 global $wgUpdateCompatibleMetadata;
 558                 if ( wfReadOnly() ) {
 559                         return;
 560                 }
 561
 562                 $upgrade = false;
 563                 if ( is_null( $this->media_type ) ||
 564                         $this->mime == 'image/svg'
 565                 ) {
 566                         $upgrade = true;
 567                 } else {
 568                         $handler = $this->getHandler();
 569                         if ( $handler ) {
 570                                 $validity = $handler->isMetadataValid( $this, $this->getMetadata() );
 571                                 if ( $validity === MediaHandler::METADATA_BAD
 572                                         || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata )
 573                                 ) {
 574                                         $upgrade = true;
 575                                 }
 576                         }
 577                 }
 578
 579                 if ( $upgrade ) {
 580                         try {
 581                                 $this->upgradeRow();
 582                         } catch ( LocalFileLockError $e ) {
 583                                 // let the other process handle it (or do it next time)
 584                         }
 585                         $this->upgraded = true; // avoid rework/retries
 586                 }
 587         }
 588
 589         function getUpgraded() {
 590                 return $this->upgraded;
 591         }
 592
 593         /**
 594          * Fix assorted version-related problems with the image row by reloading it from the file
 595          */
 596         function upgradeRow() {
 597                 $this->lock(); // begin
 598
 599                 $this->loadFromFile();
 600
 601                 # Don't destroy file info of missing files
 602                 if ( !$this->fileExists ) {
 603                         $this->unlock();
 604                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 605
 606                         return;
 607                 }
 608
 609                 $dbw = $this->repo->getMasterDB();
 610                 list( $major, $minor ) = self::splitMime( $this->mime );
 611
 612                 if ( wfReadOnly() ) {
 613                         $this->unlock();
 614
 615                         return;
 616                 }
 617                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 618
 619                 $dbw->update( 'image',
 620                         [
 621                                 'img_size' => $this->size, // sanity
 622                                 'img_width' => $this->width,
 623                                 'img_height' => $this->height,
 624                                 'img_bits' => $this->bits,
 625                                 'img_media_type' => $this->media_type,
 626                                 'img_major_mime' => $major,
 627                                 'img_minor_mime' => $minor,
 628                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
 629                                 'img_sha1' => $this->sha1,
 630                         ],
 631                         [ 'img_name' => $this->getName() ],
 632                         __METHOD__
 633                 );
 634
 635                 $this->invalidateCache();
 636
 637                 $this->unlock(); // done
 638
 639         }
 640
 641         /**
 642          * Set properties in this object to be equal to those given in the
 643          * associative array $info. Only cacheable fields can be set.
 644          * All fields *must* be set in $info except for getLazyCacheFields().
 645          *
 646          * If 'mime' is given, it will be split into major_mime/minor_mime.
 647          * If major_mime/minor_mime are given, $this->mime will also be set.
 648          *
 649          * @param array $info
 650          */
 651         function setProps( $info ) {
 652                 $this->dataLoaded = true;
 653                 $fields = $this->getCacheFields( '' );
 654                 $fields[] = 'fileExists';
 655
 656                 foreach ( $fields as $field ) {
 657                         if ( isset( $info[$field] ) ) {
 658                                 $this->$field = $info[$field];
 659                         }
 660                 }
 661
 662                 // Fix up mime fields
 663                 if ( isset( $info['major_mime'] ) ) {
 664                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 665                 } elseif ( isset( $info['mime'] ) ) {
 666                         $this->mime = $info['mime'];
 667                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 668                 }
 669         }
 670
 671         /** splitMime inherited */
 672         /** getName inherited */
 673         /** getTitle inherited */
 674         /** getURL inherited */
 675         /** getViewURL inherited */
 676         /** getPath inherited */
 677         /** isVisible inherited */
 678
 679         /**
 680          * @return bool
 681          */
 682         function isMissing() {
 683                 if ( $this->missing === null ) {
 684                         list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl() );
 685                         $this->missing = !$fileExists;
 686                 }
 687
 688                 return $this->missing;
 689         }
 690
 691         /**
 692          * Return the width of the image
 693          *
 694          * @param int $page
 695          * @return int
 696          */
 697         public function getWidth( $page = 1 ) {
 698                 $this->load();
 699
 700                 if ( $this->isMultipage() ) {
 701                         $handler = $this->getHandler();
 702                         if ( !$handler ) {
 703                                 return 0;
 704                         }
 705                         $dim = $handler->getPageDimensions( $this, $page );
 706                         if ( $dim ) {
 707                                 return $dim['width'];
 708                         } else {
 709                                 // For non-paged media, the false goes through an
 710                                 // intval, turning failure into 0, so do same here.
 711                                 return 0;
 712                         }
 713                 } else {
 714                         return $this->width;
 715                 }
 716         }
 717
 718         /**
 719          * Return the height of the image
 720          *
 721          * @param int $page
 722          * @return int
 723          */
 724         public function getHeight( $page = 1 ) {
 725                 $this->load();
 726
 727                 if ( $this->isMultipage() ) {
 728                         $handler = $this->getHandler();
 729                         if ( !$handler ) {
 730                                 return 0;
 731                         }
 732                         $dim = $handler->getPageDimensions( $this, $page );
 733                         if ( $dim ) {
 734                                 return $dim['height'];
 735                         } else {
 736                                 // For non-paged media, the false goes through an
 737                                 // intval, turning failure into 0, so do same here.
 738                                 return 0;
 739                         }
 740                 } else {
 741                         return $this->height;
 742                 }
 743         }
 744
 745         /**
 746          * Returns ID or name of user who uploaded the file
 747          *
 748          * @param string $type 'text' or 'id'
 749          * @return int|string
 750          */
 751         function getUser( $type = 'text' ) {
 752                 $this->load();
 753
 754                 if ( $type == 'text' ) {
 755                         return $this->user_text;
 756                 } elseif ( $type == 'id' ) {
 757                         return (int)$this->user;
 758                 }
 759         }
 760
 761         /**
 762          * Get short description URL for a file based on the page ID.
 763          *
 764          * @return string|null
 765          * @throws MWException
 766          * @since 1.27
 767          */
 768         public function getDescriptionShortUrl() {
 769                 $pageId = $this->title->getArticleID();
 770
 771                 if ( $pageId !== null ) {
 772                         $url = $this->repo->makeUrl( [ 'curid' => $pageId ] );
 773                         if ( $url !== false ) {
 774                                 return $url;
 775                         }
 776                 }
 777                 return null;
 778         }
 779
 780         /**
 781          * Get handler-specific metadata
 782          * @return string
 783          */
 784         function getMetadata() {
 785                 $this->load( self::LOAD_ALL ); // large metadata is loaded in another step
 786                 return $this->metadata;
 787         }
 788
 789         /**
 790          * @return int
 791          */
 792         function getBitDepth() {
 793                 $this->load();
 794
 795                 return (int)$this->bits;
 796         }
 797
 798         /**
 799          * Returns the size of the image file, in bytes
 800          * @return int
 801          */
 802         public function getSize() {
 803                 $this->load();
 804
 805                 return $this->size;
 806         }
 807
 808         /**
 809          * Returns the MIME type of the file.
 810          * @return string
 811          */
 812         function getMimeType() {
 813                 $this->load();
 814
 815                 return $this->mime;
 816         }
 817
 818         /**
 819          * Returns the type of the media in the file.
 820          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 821          * @return string
 822          */
 823         function getMediaType() {
 824                 $this->load();
 825
 826                 return $this->media_type;
 827         }
 828
 829         /** canRender inherited */
 830         /** mustRender inherited */
 831         /** allowInlineDisplay inherited */
 832         /** isSafeFile inherited */
 833         /** isTrustedFile inherited */
 834
 835         /**
 836          * Returns true if the file exists on disk.
 837          * @return bool Whether file exist on disk.
 838          */
 839         public function exists() {
 840                 $this->load();
 841
 842                 return $this->fileExists;
 843         }
 844
 845         /** getTransformScript inherited */
 846         /** getUnscaledThumb inherited */
 847         /** thumbName inherited */
 848         /** createThumb inherited */
 849         /** transform inherited */
 850
 851         /** getHandler inherited */
 852         /** iconThumb inherited */
 853         /** getLastError inherited */
 854
 855         /**
 856          * Get all thumbnail names previously generated for this file
 857          * @param string|bool $archiveName Name of an archive file, default false
 858          * @return array First element is the base dir, then files in that base dir.
 859          */
 860         function getThumbnails( $archiveName = false ) {
 861                 if ( $archiveName ) {
 862                         $dir = $this->getArchiveThumbPath( $archiveName );
 863                 } else {
 864                         $dir = $this->getThumbPath();
 865                 }
 866
 867                 $backend = $this->repo->getBackend();
 868                 $files = [ $dir ];
 869                 try {
 870                         $iterator = $backend->getFileList( [ 'dir' => $dir ] );
 871                         foreach ( $iterator as $file ) {
 872                                 $files[] = $file;
 873                         }
 874                 } catch ( FileBackendError $e ) {
 875                 } // suppress (bug 54674)
 876
 877                 return $files;
 878         }
 879
 880         /**
 881          * Refresh metadata in memcached, but don't touch thumbnails or CDN
 882          */
 883         function purgeMetadataCache() {
 884                 $this->invalidateCache();
 885         }
 886
 887         /**
 888          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the CDN.
 889          *
 890          * @param array $options An array potentially with the key forThumbRefresh.
 891          *
 892          * @note This used to purge old thumbnails by default as well, but doesn't anymore.
 893          */
 894         function purgeCache( $options = [] ) {
 895                 // Refresh metadata cache
 896                 $this->purgeMetadataCache();
 897
 898                 // Delete thumbnails
 899                 $this->purgeThumbnails( $options );
 900
 901                 // Purge CDN cache for this file
 902                 DeferredUpdates::addUpdate(
 903                         new CdnCacheUpdate( [ $this->getUrl() ] ),
 904                         DeferredUpdates::PRESEND
 905                 );
 906         }
 907
 908         /**
 909          * Delete cached transformed files for an archived version only.
 910          * @param string $archiveName Name of the archived file
 911          */
 912         function purgeOldThumbnails( $archiveName ) {
 913                 // Get a list of old thumbnails and URLs
 914                 $files = $this->getThumbnails( $archiveName );
 915
 916                 // Purge any custom thumbnail caches
 917                 Hooks::run( 'LocalFilePurgeThumbnails', [ $this, $archiveName ] );
 918
 919                 // Delete thumbnails
 920                 $dir = array_shift( $files );
 921                 $this->purgeThumbList( $dir, $files );
 922
 923                 // Purge the CDN
 924                 $urls = [];
 925                 foreach ( $files as $file ) {
 926                         $urls[] = $this->getArchiveThumbUrl( $archiveName, $file );
 927                 }
 928                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $urls ), DeferredUpdates::PRESEND );
 929         }
 930
 931         /**
 932          * Delete cached transformed files for the current version only.
 933          * @param array $options
 934          */
 935         public function purgeThumbnails( $options = [] ) {
 936                 $files = $this->getThumbnails();
 937                 // Always purge all files from CDN regardless of handler filters
 938                 $urls = [];
 939                 foreach ( $files as $file ) {
 940                         $urls[] = $this->getThumbUrl( $file );
 941                 }
 942                 array_shift( $urls ); // don't purge directory
 943
 944                 // Give media handler a chance to filter the file purge list
 945                 if ( !empty( $options['forThumbRefresh'] ) ) {
 946                         $handler = $this->getHandler();
 947                         if ( $handler ) {
 948                                 $handler->filterThumbnailPurgeList( $files, $options );
 949                         }
 950                 }
 951
 952                 // Purge any custom thumbnail caches
 953                 Hooks::run( 'LocalFilePurgeThumbnails', [ $this, false ] );
 954
 955                 // Delete thumbnails
 956                 $dir = array_shift( $files );
 957                 $this->purgeThumbList( $dir, $files );
 958
 959                 // Purge the CDN
 960                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $urls ), DeferredUpdates::PRESEND );
 961         }
 962
 963         /**
 964          * Delete a list of thumbnails visible at urls
 965          * @param string $dir Base dir of the files.
 966          * @param array $files Array of strings: relative filenames (to $dir)
 967          */
 968         protected function purgeThumbList( $dir, $files ) {
 969                 $fileListDebug = strtr(
 970                         var_export( $files, true ),
 971                         [ "\n" => '' ]
 972                 );
 973                 wfDebug( __METHOD__ . ": $fileListDebug\n" );
 974
 975                 $purgeList = [];
 976                 foreach ( $files as $file ) {
 977                         # Check that the base file name is part of the thumb name
 978                         # This is a basic sanity check to avoid erasing unrelated directories
 979                         if ( strpos( $file, $this->getName() ) !== false
 980                                 || strpos( $file, "-thumbnail" ) !== false // "short" thumb name
 981                         ) {
 982                                 $purgeList[] = "{$dir}/{$file}";
 983                         }
 984                 }
 985
 986                 # Delete the thumbnails
 987                 $this->repo->quickPurgeBatch( $purgeList );
 988                 # Clear out the thumbnail directory if empty
 989                 $this->repo->quickCleanDir( $dir );
 990         }
 991
 992         /** purgeDescription inherited */
 993         /** purgeEverything inherited */
 994
 995         /**
 996          * @param int $limit Optional: Limit to number of results
 997          * @param int $start Optional: Timestamp, start from
 998          * @param int $end Optional: Timestamp, end at
 999          * @param bool $inc
1000          * @return OldLocalFile[]
1001          */
1002         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
1003                 $dbr = $this->repo->getSlaveDB();
1004                 $tables = [ 'oldimage' ];
1005                 $fields = OldLocalFile::selectFields();
1006                 $conds = $opts = $join_conds = [];
1007                 $eq = $inc ? '=' : '';
1008                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
1009
1010                 if ( $start ) {
1011                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
1012                 }
1013
1014                 if ( $end ) {
1015                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
1016                 }
1017
1018                 if ( $limit ) {
1019                         $opts['LIMIT'] = $limit;
1020                 }
1021
1022                 // Search backwards for time > x queries
1023                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
1024                 $opts['ORDER BY'] = "oi_timestamp $order";
1025                 $opts['USE INDEX'] = [ 'oldimage' => 'oi_name_timestamp' ];
1026
1027                 Hooks::run( 'LocalFile::getHistory', [ &$this, &$tables, &$fields,
1028                         &$conds, &$opts, &$join_conds ] );
1029
1030                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
1031                 $r = [];
1032
1033                 foreach ( $res as $row ) {
1034                         $r[] = $this->repo->newFileFromRow( $row );
1035                 }
1036
1037                 if ( $order == 'ASC' ) {
1038                         $r = array_reverse( $r ); // make sure it ends up descending
1039                 }
1040
1041                 return $r;
1042         }
1043
1044         /**
1045          * Returns the history of this file, line by line.
1046          * starts with current version, then old versions.
1047          * uses $this->historyLine to check which line to return:
1048          *  0      return line for current version
1049          *  1      query for old versions, return first one
1050          *  2, ... return next old version from above query
1051          * @return bool
1052          */
1053         public function nextHistoryLine() {
1054                 # Polymorphic function name to distinguish foreign and local fetches
1055                 $fname = get_class( $this ) . '::' . __FUNCTION__;
1056
1057                 $dbr = $this->repo->getSlaveDB();
1058
1059                 if ( $this->historyLine == 0 ) { // called for the first time, return line from cur
1060                         $this->historyRes = $dbr->select( 'image',
1061                                 [
1062                                         '*',
1063                                         "'' AS oi_archive_name",
1064                                         '0 as oi_deleted',
1065                                         'img_sha1'
1066                                 ],
1067                                 [ 'img_name' => $this->title->getDBkey() ],
1068                                 $fname
1069                         );
1070
1071                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
1072                                 $this->historyRes = null;
1073
1074                                 return false;
1075                         }
1076                 } elseif ( $this->historyLine == 1 ) {
1077                         $this->historyRes = $dbr->select( 'oldimage', '*',
1078                                 [ 'oi_name' => $this->title->getDBkey() ],
1079                                 $fname,
1080                                 [ 'ORDER BY' => 'oi_timestamp DESC' ]
1081                         );
1082                 }
1083                 $this->historyLine++;
1084
1085                 return $dbr->fetchObject( $this->historyRes );
1086         }
1087
1088         /**
1089          * Reset the history pointer to the first element of the history
1090          */
1091         public function resetHistory() {
1092                 $this->historyLine = 0;
1093
1094                 if ( !is_null( $this->historyRes ) ) {
1095                         $this->historyRes = null;
1096                 }
1097         }
1098
1099         /** getHashPath inherited */
1100         /** getRel inherited */
1101         /** getUrlRel inherited */
1102         /** getArchiveRel inherited */
1103         /** getArchivePath inherited */
1104         /** getThumbPath inherited */
1105         /** getArchiveUrl inherited */
1106         /** getThumbUrl inherited */
1107         /** getArchiveVirtualUrl inherited */
1108         /** getThumbVirtualUrl inherited */
1109         /** isHashed inherited */
1110
1111         /**
1112          * Upload a file and record it in the DB
1113          * @param string|FSFile $src Source storage path, virtual URL, or filesystem path
1114          * @param string $comment Upload description
1115          * @param string $pageText Text to use for the new description page,
1116          *   if a new description page is created
1117          * @param int|bool $flags Flags for publish()
1118          * @param array|bool $props File properties, if known. This can be used to
1119          *   reduce the upload time when uploading virtual URLs for which the file
1120          *   info is already known
1121          * @param string|bool $timestamp Timestamp for img_timestamp, or false to use the
1122          *   current time
1123          * @param User|null $user User object or null to use $wgUser
1124          * @param string[] $tags Change tags to add to the log entry and page revision.
1125          *   (This doesn't check $user's permissions.)
1126          * @return FileRepoStatus On success, the value member contains the
1127          *     archive name, or an empty string if it was a new file.
1128          */
1129         function upload( $src, $comment, $pageText, $flags = 0, $props = false,
1130                 $timestamp = false, $user = null, $tags = []
1131         ) {
1132                 global $wgContLang;
1133
1134                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1135                         return $this->readOnlyFatalStatus();
1136                 }
1137
1138                 $srcPath = ( $src instanceof FSFile ) ? $src->getPath() : $src;
1139                 if ( !$props ) {
1140                         if ( $this->repo->isVirtualUrl( $srcPath )
1141                                 || FileBackend::isStoragePath( $srcPath )
1142                         ) {
1143                                 $props = $this->repo->getFileProps( $srcPath );
1144                         } else {
1145                                 $props = FSFile::getPropsFromPath( $srcPath );
1146                         }
1147                 }
1148
1149                 $options = [];
1150                 $handler = MediaHandler::getHandler( $props['mime'] );
1151                 if ( $handler ) {
1152                         $options['headers'] = $handler->getStreamHeaders( $props['metadata'] );
1153                 } else {
1154                         $options['headers'] = [];
1155                 }
1156
1157                 // Trim spaces on user supplied text
1158                 $comment = trim( $comment );
1159
1160                 // Truncate nicely or the DB will do it for us
1161                 // non-nicely (dangling multi-byte chars, non-truncated version in cache).
1162                 $comment = $wgContLang->truncate( $comment, 255 );
1163                 $this->lock(); // begin
1164                 $status = $this->publish( $src, $flags, $options );
1165
1166                 if ( $status->successCount >= 2 ) {
1167                         // There will be a copy+(one of move,copy,store).
1168                         // The first succeeding does not commit us to updating the DB
1169                         // since it simply copied the current version to a timestamped file name.
1170                         // It is only *preferable* to avoid leaving such files orphaned.
1171                         // Once the second operation goes through, then the current version was
1172                         // updated and we must therefore update the DB too.
1173                         $oldver = $status->value;
1174                         if ( !$this->recordUpload2( $oldver, $comment, $pageText, $props, $timestamp, $user, $tags ) ) {
1175                                 $status->fatal( 'filenotfound', $srcPath );
1176                         }
1177                 }
1178
1179                 $this->unlock(); // done
1180
1181                 return $status;
1182         }
1183
1184         /**
1185          * Record a file upload in the upload log and the image table
1186          * @param string $oldver
1187          * @param string $desc
1188          * @param string $license
1189          * @param string $copyStatus
1190          * @param string $source
1191          * @param bool $watch
1192          * @param string|bool $timestamp
1193          * @param User|null $user User object or null to use $wgUser
1194          * @return bool
1195          */
1196         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
1197                 $watch = false, $timestamp = false, User $user = null ) {
1198                 if ( !$user ) {
1199                         global $wgUser;
1200                         $user = $wgUser;
1201                 }
1202
1203                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
1204
1205                 if ( !$this->recordUpload2( $oldver, $desc, $pageText, false, $timestamp, $user ) ) {
1206                         return false;
1207                 }
1208
1209                 if ( $watch ) {
1210                         $user->addWatch( $this->getTitle() );
1211                 }
1212
1213                 return true;
1214         }
1215
1216         /**
1217          * Record a file upload in the upload log and the image table
1218          * @param string $oldver
1219          * @param string $comment
1220          * @param string $pageText
1221          * @param bool|array $props
1222          * @param string|bool $timestamp
1223          * @param null|User $user
1224          * @param string[] $tags
1225          * @return bool
1226          */
1227         function recordUpload2(
1228                 $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null, $tags = []
1229         ) {
1230                 if ( is_null( $user ) ) {
1231                         global $wgUser;
1232                         $user = $wgUser;
1233                 }
1234
1235                 $dbw = $this->repo->getMasterDB();
1236
1237                 # Imports or such might force a certain timestamp; otherwise we generate
1238                 # it and can fudge it slightly to keep (name,timestamp) unique on re-upload.
1239                 if ( $timestamp === false ) {
1240                         $timestamp = $dbw->timestamp();
1241                         $allowTimeKludge = true;
1242                 } else {
1243                         $allowTimeKludge = false;
1244                 }
1245
1246                 $props = $props ?: $this->repo->getFileProps( $this->getVirtualUrl() );
1247                 $props['description'] = $comment;
1248                 $props['user'] = $user->getId();
1249                 $props['user_text'] = $user->getName();
1250                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1251                 $this->setProps( $props );
1252
1253                 # Fail now if the file isn't there
1254                 if ( !$this->fileExists ) {
1255                         wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
1256
1257                         return false;
1258                 }
1259
1260                 $dbw->startAtomic( __METHOD__ );
1261
1262                 # Test to see if the row exists using INSERT IGNORE
1263                 # This avoids race conditions by locking the row until the commit, and also
1264                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
1265                 $dbw->insert( 'image',
1266                         [
1267                                 'img_name' => $this->getName(),
1268                                 'img_size' => $this->size,
1269                                 'img_width' => intval( $this->width ),
1270                                 'img_height' => intval( $this->height ),
1271                                 'img_bits' => $this->bits,
1272                                 'img_media_type' => $this->media_type,
1273                                 'img_major_mime' => $this->major_mime,
1274                                 'img_minor_mime' => $this->minor_mime,
1275                                 'img_timestamp' => $timestamp,
1276                                 'img_description' => $comment,
1277                                 'img_user' => $user->getId(),
1278                                 'img_user_text' => $user->getName(),
1279                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1280                                 'img_sha1' => $this->sha1
1281                         ],
1282                         __METHOD__,
1283                         'IGNORE'
1284                 );
1285
1286                 $reupload = ( $dbw->affectedRows() == 0 );
1287                 if ( $reupload ) {
1288                         if ( $allowTimeKludge ) {
1289                                 # Use LOCK IN SHARE MODE to ignore any transaction snapshotting
1290                                 $ltimestamp = $dbw->selectField(
1291                                         'image',
1292                                         'img_timestamp',
1293                                         [ 'img_name' => $this->getName() ],
1294                                         __METHOD__,
1295                                         [ 'LOCK IN SHARE MODE' ]
1296                                 );
1297                                 $lUnixtime = $ltimestamp ? wfTimestamp( TS_UNIX, $ltimestamp ) : false;
1298                                 # Avoid a timestamp that is not newer than the last version
1299                                 # TODO: the image/oldimage tables should be like page/revision with an ID field
1300                                 if ( $lUnixtime && wfTimestamp( TS_UNIX, $timestamp ) <= $lUnixtime ) {
1301                                         sleep( 1 ); // fast enough re-uploads would go far in the future otherwise
1302                                         $timestamp = $dbw->timestamp( $lUnixtime + 1 );
1303                                         $this->timestamp = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1304                                 }
1305                         }
1306
1307                         # (bug 34993) Note: $oldver can be empty here, if the previous
1308                         # version of the file was broken. Allow registration of the new
1309                         # version to continue anyway, because that's better than having
1310                         # an image that's not fixable by user operations.
1311                         # Collision, this is an update of a file
1312                         # Insert previous contents into oldimage
1313                         $dbw->insertSelect( 'oldimage', 'image',
1314                                 [
1315                                         'oi_name' => 'img_name',
1316                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1317                                         'oi_size' => 'img_size',
1318                                         'oi_width' => 'img_width',
1319                                         'oi_height' => 'img_height',
1320                                         'oi_bits' => 'img_bits',
1321                                         'oi_timestamp' => 'img_timestamp',
1322                                         'oi_description' => 'img_description',
1323                                         'oi_user' => 'img_user',
1324                                         'oi_user_text' => 'img_user_text',
1325                                         'oi_metadata' => 'img_metadata',
1326                                         'oi_media_type' => 'img_media_type',
1327                                         'oi_major_mime' => 'img_major_mime',
1328                                         'oi_minor_mime' => 'img_minor_mime',
1329                                         'oi_sha1' => 'img_sha1'
1330                                 ],
1331                                 [ 'img_name' => $this->getName() ],
1332                                 __METHOD__
1333                         );
1334
1335                         # Update the current image row
1336                         $dbw->update( 'image',
1337                                 [
1338                                         'img_size' => $this->size,
1339                                         'img_width' => intval( $this->width ),
1340                                         'img_height' => intval( $this->height ),
1341                                         'img_bits' => $this->bits,
1342                                         'img_media_type' => $this->media_type,
1343                                         'img_major_mime' => $this->major_mime,
1344                                         'img_minor_mime' => $this->minor_mime,
1345                                         'img_timestamp' => $timestamp,
1346                                         'img_description' => $comment,
1347                                         'img_user' => $user->getId(),
1348                                         'img_user_text' => $user->getName(),
1349                                         'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1350                                         'img_sha1' => $this->sha1
1351                                 ],
1352                                 [ 'img_name' => $this->getName() ],
1353                                 __METHOD__
1354                         );
1355                 }
1356
1357                 $descTitle = $this->getTitle();
1358                 $descId = $descTitle->getArticleID();
1359                 $wikiPage = new WikiFilePage( $descTitle );
1360                 $wikiPage->setFile( $this );
1361
1362                 // Add the log entry...
1363                 $logEntry = new ManualLogEntry( 'upload', $reupload ? 'overwrite' : 'upload' );
1364                 $logEntry->setTimestamp( $this->timestamp );
1365                 $logEntry->setPerformer( $user );
1366                 $logEntry->setComment( $comment );
1367                 $logEntry->setTarget( $descTitle );
1368                 // Allow people using the api to associate log entries with the upload.
1369                 // Log has a timestamp, but sometimes different from upload timestamp.
1370                 $logEntry->setParameters(
1371                         [
1372                                 'img_sha1' => $this->sha1,
1373                                 'img_timestamp' => $timestamp,
1374                         ]
1375                 );
1376                 // Note we keep $logId around since during new image
1377                 // creation, page doesn't exist yet, so log_page = 0
1378                 // but we want it to point to the page we're making,
1379                 // so we later modify the log entry.
1380                 // For a similar reason, we avoid making an RC entry
1381                 // now and wait until the page exists.
1382                 $logId = $logEntry->insert();
1383
1384                 if ( $descTitle->exists() ) {
1385                         // Use own context to get the action text in content language
1386                         $formatter = LogFormatter::newFromEntry( $logEntry );
1387                         $formatter->setContext( RequestContext::newExtraneousContext( $descTitle ) );
1388                         $editSummary = $formatter->getPlainActionText();
1389
1390                         $nullRevision = Revision::newNullRevision(
1391                                 $dbw,
1392                                 $descId,
1393                                 $editSummary,
1394                                 false,
1395                                 $user
1396                         );
1397                         if ( $nullRevision ) {
1398                                 $nullRevision->insertOn( $dbw );
1399                                 Hooks::run(
1400                                         'NewRevisionFromEditComplete',
1401                                         [ $wikiPage, $nullRevision, $nullRevision->getParentId(), $user ]
1402                                 );
1403                                 $wikiPage->updateRevisionOn( $dbw, $nullRevision );
1404                                 // Associate null revision id
1405                                 $logEntry->setAssociatedRevId( $nullRevision->getId() );
1406                         }
1407
1408                         $newPageContent = null;
1409                 } else {
1410                         // Make the description page and RC log entry post-commit
1411                         $newPageContent = ContentHandler::makeContent( $pageText, $descTitle );
1412                 }
1413
1414                 # Defer purges, page creation, and link updates in case they error out.
1415                 # The most important thing is that files and the DB registry stay synced.
1416                 $dbw->endAtomic( __METHOD__ );
1417
1418                 # Do some cache purges after final commit so that:
1419                 # a) Changes are more likely to be seen post-purge
1420                 # b) They won't cause rollback of the log publish/update above
1421                 $that = $this;
1422                 $dbw->onTransactionIdle( function () use (
1423                         $that, $reupload, $wikiPage, $newPageContent, $comment, $user, $logEntry, $logId, $descId, $tags
1424                 ) {
1425                         # Update memcache after the commit
1426                         $that->invalidateCache();
1427
1428                         $updateLogPage = false;
1429                         if ( $newPageContent ) {
1430                                 # New file page; create the description page.
1431                                 # There's already a log entry, so don't make a second RC entry
1432                                 # CDN and file cache for the description page are purged by doEditContent.
1433                                 $status = $wikiPage->doEditContent(
1434                                         $newPageContent,
1435                                         $comment,
1436                                         EDIT_NEW | EDIT_SUPPRESS_RC,
1437                                         false,
1438                                         $user
1439                                 );
1440
1441                                 if ( isset( $status->value['revision'] ) ) {
1442                                         // Associate new page revision id
1443                                         $logEntry->setAssociatedRevId( $status->value['revision']->getId() );
1444                                 }
1445                                 // This relies on the resetArticleID() call in WikiPage::insertOn(),
1446                                 // which is triggered on $descTitle by doEditContent() above.
1447                                 if ( isset( $status->value['revision'] ) ) {
1448                                         /** @var $rev Revision */
1449                                         $rev = $status->value['revision'];
1450                                         $updateLogPage = $rev->getPage();
1451                                 }
1452                         } else {
1453                                 # Existing file page: invalidate description page cache
1454                                 $wikiPage->getTitle()->invalidateCache();
1455                                 $wikiPage->getTitle()->purgeSquid();
1456                                 # Allow the new file version to be patrolled from the page footer
1457                                 Article::purgePatrolFooterCache( $descId );
1458                         }
1459
1460                         # Update associated rev id. This should be done by $logEntry->insert() earlier,
1461                         # but setAssociatedRevId() wasn't called at that point yet...
1462                         $logParams = $logEntry->getParameters();
1463                         $logParams['associated_rev_id'] = $logEntry->getAssociatedRevId();
1464                         $update = [ 'log_params' => LogEntryBase::makeParamBlob( $logParams ) ];
1465                         if ( $updateLogPage ) {
1466                                 # Also log page, in case where we just created it above
1467                                 $update['log_page'] = $updateLogPage;
1468                         }
1469                         $that->getRepo()->getMasterDB()->update(
1470                                 'logging',
1471                                 $update,
1472                                 [ 'log_id' => $logId ],
1473                                 __METHOD__
1474                         );
1475                         $that->getRepo()->getMasterDB()->insert(
1476                                 'log_search',
1477                                 [
1478                                         'ls_field' => 'associated_rev_id',
1479                                         'ls_value' => $logEntry->getAssociatedRevId(),
1480                                         'ls_log_id' => $logId,
1481                                 ],
1482                                 __METHOD__
1483                         );
1484
1485                         # Add change tags, if any
1486                         if ( $tags ) {
1487                                 $logEntry->setTags( $tags );
1488                         }
1489
1490                         # Uploads can be patrolled
1491                         $logEntry->setIsPatrollable( true );
1492
1493                         # Now that the log entry is up-to-date, make an RC entry.
1494                         $logEntry->publish( $logId );
1495
1496                         # Run hook for other updates (typically more cache purging)
1497                         Hooks::run( 'FileUpload', [ $that, $reupload, !$newPageContent ] );
1498
1499                         if ( $reupload ) {
1500                                 # Delete old thumbnails
1501                                 $that->purgeThumbnails();
1502                                 # Remove the old file from the CDN cache
1503                                 DeferredUpdates::addUpdate(
1504                                         new CdnCacheUpdate( [ $that->getUrl() ] ),
1505                                         DeferredUpdates::PRESEND
1506                                 );
1507                         } else {
1508                                 # Update backlink pages pointing to this title if created
1509                                 LinksUpdate::queueRecursiveJobsForTable( $that->getTitle(), 'imagelinks' );
1510                         }
1511                 } );
1512
1513                 if ( !$reupload ) {
1514                         # This is a new file, so update the image count
1515                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => 1 ] ) );
1516                 }
1517
1518                 # Invalidate cache for all pages using this file
1519                 DeferredUpdates::addUpdate( new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' ) );
1520
1521                 return true;
1522         }
1523
1524         /**
1525          * Move or copy a file to its public location. If a file exists at the
1526          * destination, move it to an archive. Returns a FileRepoStatus object with
1527          * the archive name in the "value" member on success.
1528          *
1529          * The archive name should be passed through to recordUpload for database
1530          * registration.
1531          *
1532          * @param string|FSFile $src Local filesystem path or virtual URL to the source image
1533          * @param int $flags A bitwise combination of:
1534          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1535          * @param array $options Optional additional parameters
1536          * @return FileRepoStatus On success, the value member contains the
1537          *     archive name, or an empty string if it was a new file.
1538          */
1539         function publish( $src, $flags = 0, array $options = [] ) {
1540                 return $this->publishTo( $src, $this->getRel(), $flags, $options );
1541         }
1542
1543         /**
1544          * Move or copy a file to a specified location. Returns a FileRepoStatus
1545          * object with the archive name in the "value" member on success.
1546          *
1547          * The archive name should be passed through to recordUpload for database
1548          * registration.
1549          *
1550          * @param string|FSFile $src Local filesystem path or virtual URL to the source image
1551          * @param string $dstRel Target relative path
1552          * @param int $flags A bitwise combination of:
1553          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1554          * @param array $options Optional additional parameters
1555          * @return FileRepoStatus On success, the value member contains the
1556          *     archive name, or an empty string if it was a new file.
1557          */
1558         function publishTo( $src, $dstRel, $flags = 0, array $options = [] ) {
1559                 $srcPath = ( $src instanceof FSFile ) ? $src->getPath() : $src;
1560
1561                 $repo = $this->getRepo();
1562                 if ( $repo->getReadOnlyReason() !== false ) {
1563                         return $this->readOnlyFatalStatus();
1564                 }
1565
1566                 $this->lock(); // begin
1567
1568                 $archiveName = wfTimestamp( TS_MW ) . '!' . $this->getName();
1569                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1570
1571                 if ( $repo->hasSha1Storage() ) {
1572                         $sha1 = $repo->isVirtualUrl( $srcPath )
1573                                 ? $repo->getFileSha1( $srcPath )
1574                                 : FSFile::getSha1Base36FromPath( $srcPath );
1575                         $dst = $repo->getBackend()->getPathForSHA1( $sha1 );
1576                         $status = $repo->quickImport( $src, $dst );
1577                         if ( $flags & File::DELETE_SOURCE ) {
1578                                 unlink( $srcPath );
1579                         }
1580
1581                         if ( $this->exists() ) {
1582                                 $status->value = $archiveName;
1583                         }
1584                 } else {
1585                         $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1586                         $status = $repo->publish( $srcPath, $dstRel, $archiveRel, $flags, $options );
1587
1588                         if ( $status->value == 'new' ) {
1589                                 $status->value = '';
1590                         } else {
1591                                 $status->value = $archiveName;
1592                         }
1593                 }
1594
1595                 $this->unlock(); // done
1596
1597                 return $status;
1598         }
1599
1600         /** getLinksTo inherited */
1601         /** getExifData inherited */
1602         /** isLocal inherited */
1603         /** wasDeleted inherited */
1604
1605         /**
1606          * Move file to the new title
1607          *
1608          * Move current, old version and all thumbnails
1609          * to the new filename. Old file is deleted.
1610          *
1611          * Cache purging is done; checks for validity
1612          * and logging are caller's responsibility
1613          *
1614          * @param Title $target New file name
1615          * @return FileRepoStatus
1616          */
1617         function move( $target ) {
1618                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1619                         return $this->readOnlyFatalStatus();
1620                 }
1621
1622                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1623                 $batch = new LocalFileMoveBatch( $this, $target );
1624
1625                 $this->lock(); // begin
1626                 $batch->addCurrent();
1627                 $archiveNames = $batch->addOlds();
1628                 $status = $batch->execute();
1629                 $this->unlock(); // done
1630
1631                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1632
1633                 // Purge the source and target files...
1634                 $oldTitleFile = wfLocalFile( $this->title );
1635                 $newTitleFile = wfLocalFile( $target );
1636                 // Hack: the lock()/unlock() pair is nested in a transaction so the locking is not
1637                 // tied to BEGIN/COMMIT. To avoid slow purges in the transaction, move them outside.
1638                 $this->getRepo()->getMasterDB()->onTransactionIdle(
1639                         function () use ( $oldTitleFile, $newTitleFile, $archiveNames ) {
1640                                 $oldTitleFile->purgeEverything();
1641                                 foreach ( $archiveNames as $archiveName ) {
1642                                         $oldTitleFile->purgeOldThumbnails( $archiveName );
1643                                 }
1644                                 $newTitleFile->purgeEverything();
1645                         }
1646                 );
1647
1648                 if ( $status->isOK() ) {
1649                         // Now switch the object
1650                         $this->title = $target;
1651                         // Force regeneration of the name and hashpath
1652                         unset( $this->name );
1653                         unset( $this->hashPath );
1654                 }
1655
1656                 return $status;
1657         }
1658
1659         /**
1660          * Delete all versions of the file.
1661          *
1662          * Moves the files into an archive directory (or deletes them)
1663          * and removes the database rows.
1664          *
1665          * Cache purging is done; logging is caller's responsibility.
1666          *
1667          * @param string $reason
1668          * @param bool $suppress
1669          * @param User|null $user
1670          * @return FileRepoStatus
1671          */
1672         function delete( $reason, $suppress = false, $user = null ) {
1673                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1674                         return $this->readOnlyFatalStatus();
1675                 }
1676
1677                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress, $user );
1678
1679                 $this->lock(); // begin
1680                 $batch->addCurrent();
1681                 # Get old version relative paths
1682                 $archiveNames = $batch->addOlds();
1683                 $status = $batch->execute();
1684                 $this->unlock(); // done
1685
1686                 if ( $status->isOK() ) {
1687                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => -1 ] ) );
1688                 }
1689
1690                 // Hack: the lock()/unlock() pair is nested in a transaction so the locking is not
1691                 // tied to BEGIN/COMMIT. To avoid slow purges in the transaction, move them outside.
1692                 $that = $this;
1693                 $this->getRepo()->getMasterDB()->onTransactionIdle(
1694                         function () use ( $that, $archiveNames ) {
1695                                 $that->purgeEverything();
1696                                 foreach ( $archiveNames as $archiveName ) {
1697                                         $that->purgeOldThumbnails( $archiveName );
1698                                 }
1699                         }
1700                 );
1701
1702                 // Purge the CDN
1703                 $purgeUrls = [];
1704                 foreach ( $archiveNames as $archiveName ) {
1705                         $purgeUrls[] = $this->getArchiveUrl( $archiveName );
1706                 }
1707                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $purgeUrls ), DeferredUpdates::PRESEND );
1708
1709                 return $status;
1710         }
1711
1712         /**
1713          * Delete an old version of the file.
1714          *
1715          * Moves the file into an archive directory (or deletes it)
1716          * and removes the database row.
1717          *
1718          * Cache purging is done; logging is caller's responsibility.
1719          *
1720          * @param string $archiveName
1721          * @param string $reason
1722          * @param bool $suppress
1723          * @param User|null $user
1724          * @throws MWException Exception on database or file store failure
1725          * @return FileRepoStatus
1726          */
1727         function deleteOld( $archiveName, $reason, $suppress = false, $user = null ) {
1728                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1729                         return $this->readOnlyFatalStatus();
1730                 }
1731
1732                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress, $user );
1733
1734                 $this->lock(); // begin
1735                 $batch->addOld( $archiveName );
1736                 $status = $batch->execute();
1737                 $this->unlock(); // done
1738
1739                 $this->purgeOldThumbnails( $archiveName );
1740                 if ( $status->isOK() ) {
1741                         $this->purgeDescription();
1742                 }
1743
1744                 DeferredUpdates::addUpdate(
1745                         new CdnCacheUpdate( [ $this->getArchiveUrl( $archiveName ) ] ),
1746                         DeferredUpdates::PRESEND
1747                 );
1748
1749                 return $status;
1750         }
1751
1752         /**
1753          * Restore all or specified deleted revisions to the given file.
1754          * Permissions and logging are left to the caller.
1755          *
1756          * May throw database exceptions on error.
1757          *
1758          * @param array $versions Set of record ids of deleted items to restore,
1759          *   or empty to restore all revisions.
1760          * @param bool $unsuppress
1761          * @return FileRepoStatus
1762          */
1763         function restore( $versions = [], $unsuppress = false ) {
1764                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1765                         return $this->readOnlyFatalStatus();
1766                 }
1767
1768                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1769
1770                 $this->lock(); // begin
1771                 if ( !$versions ) {
1772                         $batch->addAll();
1773                 } else {
1774                         $batch->addIds( $versions );
1775                 }
1776                 $status = $batch->execute();
1777                 if ( $status->isGood() ) {
1778                         $cleanupStatus = $batch->cleanup();
1779                         $cleanupStatus->successCount = 0;
1780                         $cleanupStatus->failCount = 0;
1781                         $status->merge( $cleanupStatus );
1782                 }
1783                 $this->unlock(); // done
1784
1785                 return $status;
1786         }
1787
1788         /** isMultipage inherited */
1789         /** pageCount inherited */
1790         /** scaleHeight inherited */
1791         /** getImageSize inherited */
1792
1793         /**
1794          * Get the URL of the file description page.
1795          * @return string
1796          */
1797         function getDescriptionUrl() {
1798                 return $this->title->getLocalURL();
1799         }
1800
1801         /**
1802          * Get the HTML text of the description page
1803          * This is not used by ImagePage for local files, since (among other things)
1804          * it skips the parser cache.
1805          *
1806          * @param Language $lang What language to get description in (Optional)
1807          * @return bool|mixed
1808          */
1809         function getDescriptionText( $lang = null ) {
1810                 $revision = Revision::newFromTitle( $this->title, false, Revision::READ_NORMAL );
1811                 if ( !$revision ) {
1812                         return false;
1813                 }
1814                 $content = $revision->getContent();
1815                 if ( !$content ) {
1816                         return false;
1817                 }
1818                 $pout = $content->getParserOutput( $this->title, null, new ParserOptions( null, $lang ) );
1819
1820                 return $pout->getText();
1821         }
1822
1823         /**
1824          * @param int $audience
1825          * @param User $user
1826          * @return string
1827          */
1828         function getDescription( $audience = self::FOR_PUBLIC, User $user = null ) {
1829                 $this->load();
1830                 if ( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
1831                         return '';
1832                 } elseif ( $audience == self::FOR_THIS_USER
1833                         && !$this->userCan( self::DELETED_COMMENT, $user )
1834                 ) {
1835                         return '';
1836                 } else {
1837                         return $this->description;
1838                 }
1839         }
1840
1841         /**
1842          * @return bool|string
1843          */
1844         function getTimestamp() {
1845                 $this->load();
1846
1847                 return $this->timestamp;
1848         }
1849
1850         /**
1851          * @return bool|string
1852          */
1853         public function getDescriptionTouched() {
1854                 // The DB lookup might return false, e.g. if the file was just deleted, or the shared DB repo
1855                 // itself gets it from elsewhere. To avoid repeating the DB lookups in such a case, we
1856                 // need to differentiate between null (uninitialized) and false (failed to load).
1857                 if ( $this->descriptionTouched === null ) {
1858                         $cond = [
1859                                 'page_namespace' => $this->title->getNamespace(),
1860                                 'page_title' => $this->title->getDBkey()
1861                         ];
1862                         $touched = $this->repo->getSlaveDB()->selectField( 'page', 'page_touched', $cond, __METHOD__ );
1863                         $this->descriptionTouched = $touched ? wfTimestamp( TS_MW, $touched ) : false;
1864                 }
1865
1866                 return $this->descriptionTouched;
1867         }
1868
1869         /**
1870          * @return string
1871          */
1872         function getSha1() {
1873                 $this->load();
1874                 // Initialise now if necessary
1875                 if ( $this->sha1 == '' && $this->fileExists ) {
1876                         $this->lock(); // begin
1877
1878                         $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
1879                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1880                                 $dbw = $this->repo->getMasterDB();
1881                                 $dbw->update( 'image',
1882                                         [ 'img_sha1' => $this->sha1 ],
1883                                         [ 'img_name' => $this->getName() ],
1884                                         __METHOD__ );
1885                                 $this->invalidateCache();
1886                         }
1887
1888                         $this->unlock(); // done
1889                 }
1890
1891                 return $this->sha1;
1892         }
1893
1894         /**
1895          * @return bool Whether to cache in RepoGroup (this avoids OOMs)
1896          */
1897         function isCacheable() {
1898                 $this->load();
1899
1900                 // If extra data (metadata) was not loaded then it must have been large
1901                 return $this->extraDataLoaded
1902                 && strlen( serialize( $this->metadata ) ) <= self::CACHE_FIELD_MAX_LEN;
1903         }
1904
1905         /**
1906          * Start a transaction and lock the image for update
1907          * Increments a reference counter if the lock is already held
1908          * @throws LocalFileLockError Throws an error if the lock was not acquired
1909          * @return bool Whether the file lock owns/spawned the DB transaction
1910          */
1911         function lock() {
1912                 if ( !$this->locked ) {
1913                         $dbw = $this->repo->getMasterDB();
1914                         if ( !$dbw->trxLevel() ) {
1915                                 $dbw->begin( __METHOD__ );
1916                                 $this->lockedOwnTrx = true;
1917                         }
1918                         // Bug 54736: use simple lock to handle when the file does not exist.
1919                         // SELECT FOR UPDATE prevents changes, not other SELECTs with FOR UPDATE.
1920                         // Also, that would cause contention on INSERT of similarly named rows.
1921                         $backend = $this->getRepo()->getBackend();
1922                         $lockPaths = [ $this->getPath() ]; // represents all versions of the file
1923                         $status = $backend->lockFiles( $lockPaths, LockManager::LOCK_EX, 10 );
1924                         if ( !$status->isGood() ) {
1925                                 if ( $this->lockedOwnTrx ) {
1926                                         $dbw->rollback( __METHOD__ );
1927                                 }
1928                                 throw new LocalFileLockError( $status );
1929                         }
1930                         // Release the lock *after* commit to avoid row-level contention
1931                         $this->locked++;
1932                         $dbw->onTransactionIdle( function () use ( $backend, $lockPaths ) {
1933                                 $backend->unlockFiles( $lockPaths, LockManager::LOCK_EX );
1934                         } );
1935                 }
1936
1937                 return $this->lockedOwnTrx;
1938         }
1939
1940         /**
1941          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1942          * the transaction and thereby releases the image lock.
1943          */
1944         function unlock() {
1945                 if ( $this->locked ) {
1946                         --$this->locked;
1947                         if ( !$this->locked && $this->lockedOwnTrx ) {
1948                                 $dbw = $this->repo->getMasterDB();
1949                                 $dbw->commit( __METHOD__ );
1950                                 $this->lockedOwnTrx = false;
1951                         }
1952                 }
1953         }
1954
1955         /**
1956          * Roll back the DB transaction and mark the image unlocked
1957          */
1958         function unlockAndRollback() {
1959                 $this->locked = false;
1960                 $dbw = $this->repo->getMasterDB();
1961                 $dbw->rollback( __METHOD__ );
1962                 $this->lockedOwnTrx = false;
1963         }
1964
1965         /**
1966          * @return Status
1967          */
1968         protected function readOnlyFatalStatus() {
1969                 return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
1970                         $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
1971         }
1972
1973         /**
1974          * Clean up any dangling locks
1975          */
1976         function __destruct() {
1977                 $this->unlock();
1978         }
1979 } // LocalFile class
1980
1981 # ------------------------------------------------------------------------------
1982
1983 /**
1984  * Helper class for file deletion
1985  * @ingroup FileAbstraction
1986  */
1987 class LocalFileDeleteBatch {
1988         /** @var LocalFile */
1989         private $file;
1990
1991         /** @var string */
1992         private $reason;
1993
1994         /** @var array */
1995         private $srcRels = [];
1996
1997         /** @var array */
1998         private $archiveUrls = [];
1999
2000         /** @var array Items to be processed in the deletion batch */
2001         private $deletionBatch;
2002
2003         /** @var bool Whether to suppress all suppressable fields when deleting */
2004         private $suppress;
2005
2006         /** @var FileRepoStatus */
2007         private $status;
2008
2009         /** @var User */
2010         private $user;
2011
2012         /**
2013          * @param File $file
2014          * @param string $reason
2015          * @param bool $suppress
2016          * @param User|null $user
2017          */
2018         function __construct( File $file, $reason = '', $suppress = false, $user = null ) {
2019                 $this->file = $file;
2020                 $this->reason = $reason;
2021                 $this->suppress = $suppress;
2022                 if ( $user ) {
2023                         $this->user = $user;
2024                 } else {
2025                         global $wgUser;
2026                         $this->user = $wgUser;
2027                 }
2028                 $this->status = $file->repo->newGood();
2029         }
2030
2031         public function addCurrent() {
2032                 $this->srcRels['.'] = $this->file->getRel();
2033         }
2034
2035         /**
2036          * @param string $oldName
2037          */
2038         public function addOld( $oldName ) {
2039                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
2040                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
2041         }
2042
2043         /**
2044          * Add the old versions of the image to the batch
2045          * @return array List of archive names from old versions
2046          */
2047         public function addOlds() {
2048                 $archiveNames = [];
2049
2050                 $dbw = $this->file->repo->getMasterDB();
2051                 $result = $dbw->select( 'oldimage',
2052                         [ 'oi_archive_name' ],
2053                         [ 'oi_name' => $this->file->getName() ],
2054                         __METHOD__
2055                 );
2056
2057                 foreach ( $result as $row ) {
2058                         $this->addOld( $row->oi_archive_name );
2059                         $archiveNames[] = $row->oi_archive_name;
2060                 }
2061
2062                 return $archiveNames;
2063         }
2064
2065         /**
2066          * @return array
2067          */
2068         protected function getOldRels() {
2069                 if ( !isset( $this->srcRels['.'] ) ) {
2070                         $oldRels =& $this->srcRels;
2071                         $deleteCurrent = false;
2072                 } else {
2073                         $oldRels = $this->srcRels;
2074                         unset( $oldRels['.'] );
2075                         $deleteCurrent = true;
2076                 }
2077
2078                 return [ $oldRels, $deleteCurrent ];
2079         }
2080
2081         /**
2082          * @return array
2083          */
2084         protected function getHashes() {
2085                 $hashes = [];
2086                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2087
2088                 if ( $deleteCurrent ) {
2089                         $hashes['.'] = $this->file->getSha1();
2090                 }
2091
2092                 if ( count( $oldRels ) ) {
2093                         $dbw = $this->file->repo->getMasterDB();
2094                         $res = $dbw->select(
2095                                 'oldimage',
2096                                 [ 'oi_archive_name', 'oi_sha1' ],
2097                                 [ 'oi_archive_name' => array_keys( $oldRels ),
2098                                         'oi_name' => $this->file->getName() ], // performance
2099                                 __METHOD__
2100                         );
2101
2102                         foreach ( $res as $row ) {
2103                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
2104                                         // Get the hash from the file
2105                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
2106                                         $props = $this->file->repo->getFileProps( $oldUrl );
2107
2108                                         if ( $props['fileExists'] ) {
2109                                                 // Upgrade the oldimage row
2110                                                 $dbw->update( 'oldimage',
2111                                                         [ 'oi_sha1' => $props['sha1'] ],
2112                                                         [ 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ],
2113                                                         __METHOD__ );
2114                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
2115                                         } else {
2116                                                 $hashes[$row->oi_archive_name] = false;
2117                                         }
2118                                 } else {
2119                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
2120                                 }
2121                         }
2122                 }
2123
2124                 $missing = array_diff_key( $this->srcRels, $hashes );
2125
2126                 foreach ( $missing as $name => $rel ) {
2127                         $this->status->error( 'filedelete-old-unregistered', $name );
2128                 }
2129
2130                 foreach ( $hashes as $name => $hash ) {
2131                         if ( !$hash ) {
2132                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
2133                                 unset( $hashes[$name] );
2134                         }
2135                 }
2136
2137                 return $hashes;
2138         }
2139
2140         protected function doDBInserts() {
2141                 $dbw = $this->file->repo->getMasterDB();
2142                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
2143                 $encUserId = $dbw->addQuotes( $this->user->getId() );
2144                 $encReason = $dbw->addQuotes( $this->reason );
2145                 $encGroup = $dbw->addQuotes( 'deleted' );
2146                 $ext = $this->file->getExtension();
2147                 $dotExt = $ext === '' ? '' : ".$ext";
2148                 $encExt = $dbw->addQuotes( $dotExt );
2149                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2150
2151                 // Bitfields to further suppress the content
2152                 if ( $this->suppress ) {
2153                         $bitfield = 0;
2154                         // This should be 15...
2155                         $bitfield |= Revision::DELETED_TEXT;
2156                         $bitfield |= Revision::DELETED_COMMENT;
2157                         $bitfield |= Revision::DELETED_USER;
2158                         $bitfield |= Revision::DELETED_RESTRICTED;
2159                 } else {
2160                         $bitfield = 'oi_deleted';
2161                 }
2162
2163                 if ( $deleteCurrent ) {
2164                         $concat = $dbw->buildConcat( [ "img_sha1", $encExt ] );
2165                         $where = [ 'img_name' => $this->file->getName() ];
2166                         $dbw->insertSelect( 'filearchive', 'image',
2167                                 [
2168                                         'fa_storage_group' => $encGroup,
2169                                         'fa_storage_key' => $dbw->conditional(
2170                                                 [ 'img_sha1' => '' ],
2171                                                 $dbw->addQuotes( '' ),
2172                                                 $concat
2173                                         ),
2174                                         'fa_deleted_user' => $encUserId,
2175                                         'fa_deleted_timestamp' => $encTimestamp,
2176                                         'fa_deleted_reason' => $encReason,
2177                                         'fa_deleted' => $this->suppress ? $bitfield : 0,
2178
2179                                         'fa_name' => 'img_name',
2180                                         'fa_archive_name' => 'NULL',
2181                                         'fa_size' => 'img_size',
2182                                         'fa_width' => 'img_width',
2183                                         'fa_height' => 'img_height',
2184                                         'fa_metadata' => 'img_metadata',
2185                                         'fa_bits' => 'img_bits',
2186                                         'fa_media_type' => 'img_media_type',
2187                                         'fa_major_mime' => 'img_major_mime',
2188                                         'fa_minor_mime' => 'img_minor_mime',
2189                                         'fa_description' => 'img_description',
2190                                         'fa_user' => 'img_user',
2191                                         'fa_user_text' => 'img_user_text',
2192                                         'fa_timestamp' => 'img_timestamp',
2193                                         'fa_sha1' => 'img_sha1',
2194                                 ], $where, __METHOD__ );
2195                 }
2196
2197                 if ( count( $oldRels ) ) {
2198                         $concat = $dbw->buildConcat( [ "oi_sha1", $encExt ] );
2199                         $where = [
2200                                 'oi_name' => $this->file->getName(),
2201                                 'oi_archive_name' => array_keys( $oldRels ) ];
2202                         $dbw->insertSelect( 'filearchive', 'oldimage',
2203                                 [
2204                                         'fa_storage_group' => $encGroup,
2205                                         'fa_storage_key' => $dbw->conditional(
2206                                                 [ 'oi_sha1' => '' ],
2207                                                 $dbw->addQuotes( '' ),
2208                                                 $concat
2209                                         ),
2210                                         'fa_deleted_user' => $encUserId,
2211                                         'fa_deleted_timestamp' => $encTimestamp,
2212                                         'fa_deleted_reason' => $encReason,
2213                                         'fa_deleted' => $this->suppress ? $bitfield : 'oi_deleted',
2214
2215                                         'fa_name' => 'oi_name',
2216                                         'fa_archive_name' => 'oi_archive_name',
2217                                         'fa_size' => 'oi_size',
2218                                         'fa_width' => 'oi_width',
2219                                         'fa_height' => 'oi_height',
2220                                         'fa_metadata' => 'oi_metadata',
2221                                         'fa_bits' => 'oi_bits',
2222                                         'fa_media_type' => 'oi_media_type',
2223                                         'fa_major_mime' => 'oi_major_mime',
2224                                         'fa_minor_mime' => 'oi_minor_mime',
2225                                         'fa_description' => 'oi_description',
2226                                         'fa_user' => 'oi_user',
2227                                         'fa_user_text' => 'oi_user_text',
2228                                         'fa_timestamp' => 'oi_timestamp',
2229                                         'fa_sha1' => 'oi_sha1',
2230                                 ], $where, __METHOD__ );
2231                 }
2232         }
2233
2234         function doDBDeletes() {
2235                 $dbw = $this->file->repo->getMasterDB();
2236                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2237
2238                 if ( count( $oldRels ) ) {
2239                         $dbw->delete( 'oldimage',
2240                                 [
2241                                         'oi_name' => $this->file->getName(),
2242                                         'oi_archive_name' => array_keys( $oldRels )
2243                                 ], __METHOD__ );
2244                 }
2245
2246                 if ( $deleteCurrent ) {
2247                         $dbw->delete( 'image', [ 'img_name' => $this->file->getName() ], __METHOD__ );
2248                 }
2249         }
2250
2251         /**
2252          * Run the transaction
2253          * @return FileRepoStatus
2254          */
2255         public function execute() {
2256                 $repo = $this->file->getRepo();
2257                 $this->file->lock();
2258
2259                 // Prepare deletion batch
2260                 $hashes = $this->getHashes();
2261                 $this->deletionBatch = [];
2262                 $ext = $this->file->getExtension();
2263                 $dotExt = $ext === '' ? '' : ".$ext";
2264
2265                 foreach ( $this->srcRels as $name => $srcRel ) {
2266                         // Skip files that have no hash (e.g. missing DB record, or sha1 field and file source)
2267                         if ( isset( $hashes[$name] ) ) {
2268                                 $hash = $hashes[$name];
2269                                 $key = $hash . $dotExt;
2270                                 $dstRel = $repo->getDeletedHashPath( $key ) . $key;
2271                                 $this->deletionBatch[$name] = [ $srcRel, $dstRel ];
2272                         }
2273                 }
2274
2275                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
2276                 // We acquire this lock by running the inserts now, before the file operations.
2277                 // This potentially has poor lock contention characteristics -- an alternative
2278                 // scheme would be to insert stub filearchive entries with no fa_name and commit
2279                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
2280                 $this->doDBInserts();
2281
2282                 if ( !$repo->hasSha1Storage() ) {
2283                         // Removes non-existent file from the batch, so we don't get errors.
2284                         // This also handles files in the 'deleted' zone deleted via revision deletion.
2285                         $checkStatus = $this->removeNonexistentFiles( $this->deletionBatch );
2286                         if ( !$checkStatus->isGood() ) {
2287                                 $this->status->merge( $checkStatus );
2288                                 return $this->status;
2289                         }
2290                         $this->deletionBatch = $checkStatus->value;
2291
2292                         // Execute the file deletion batch
2293                         $status = $this->file->repo->deleteBatch( $this->deletionBatch );
2294
2295                         if ( !$status->isGood() ) {
2296                                 $this->status->merge( $status );
2297                         }
2298                 }
2299
2300                 if ( !$this->status->isOK() ) {
2301                         // Critical file deletion error
2302                         // Roll back inserts, release lock and abort
2303                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
2304                         $this->file->unlockAndRollback();
2305
2306                         return $this->status;
2307                 }
2308
2309                 // Delete image/oldimage rows
2310                 $this->doDBDeletes();
2311
2312                 // Commit and return
2313                 $this->file->unlock();
2314
2315                 return $this->status;
2316         }
2317
2318         /**
2319          * Removes non-existent files from a deletion batch.
2320          * @param array $batch
2321          * @return Status
2322          */
2323         protected function removeNonexistentFiles( $batch ) {
2324                 $files = $newBatch = [];
2325
2326                 foreach ( $batch as $batchItem ) {
2327                         list( $src, ) = $batchItem;
2328                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
2329                 }
2330
2331                 $result = $this->file->repo->fileExistsBatch( $files );
2332                 if ( in_array( null, $result, true ) ) {
2333                         return Status::newFatal( 'backend-fail-internal',
2334                                 $this->file->repo->getBackend()->getName() );
2335                 }
2336
2337                 foreach ( $batch as $batchItem ) {
2338                         if ( $result[$batchItem[0]] ) {
2339                                 $newBatch[] = $batchItem;
2340                         }
2341                 }
2342
2343                 return Status::newGood( $newBatch );
2344         }
2345 }
2346
2347 # ------------------------------------------------------------------------------
2348
2349 /**
2350  * Helper class for file undeletion
2351  * @ingroup FileAbstraction
2352  */
2353 class LocalFileRestoreBatch {
2354         /** @var LocalFile */
2355         private $file;
2356
2357         /** @var array List of file IDs to restore */
2358         private $cleanupBatch;
2359
2360         /** @var array List of file IDs to restore */
2361         private $ids;
2362
2363         /** @var bool Add all revisions of the file */
2364         private $all;
2365
2366         /** @var bool Whether to remove all settings for suppressed fields */
2367         private $unsuppress = false;
2368
2369         /**
2370          * @param File $file
2371          * @param bool $unsuppress
2372          */
2373         function __construct( File $file, $unsuppress = false ) {
2374                 $this->file = $file;
2375                 $this->cleanupBatch = $this->ids = [];
2376                 $this->ids = [];
2377                 $this->unsuppress = $unsuppress;
2378         }
2379
2380         /**
2381          * Add a file by ID
2382          * @param int $fa_id
2383          */
2384         public function addId( $fa_id ) {
2385                 $this->ids[] = $fa_id;
2386         }
2387
2388         /**
2389          * Add a whole lot of files by ID
2390          * @param int[] $ids
2391          */
2392         public function addIds( $ids ) {
2393                 $this->ids = array_merge( $this->ids, $ids );
2394         }
2395
2396         /**
2397          * Add all revisions of the file
2398          */
2399         public function addAll() {
2400                 $this->all = true;
2401         }
2402
2403         /**
2404          * Run the transaction, except the cleanup batch.
2405          * The cleanup batch should be run in a separate transaction, because it locks different
2406          * rows and there's no need to keep the image row locked while it's acquiring those locks
2407          * The caller may have its own transaction open.
2408          * So we save the batch and let the caller call cleanup()
2409          * @return FileRepoStatus
2410          */
2411         public function execute() {
2412                 global $wgLang;
2413
2414                 $repo = $this->file->getRepo();
2415                 if ( !$this->all && !$this->ids ) {
2416                         // Do nothing
2417                         return $repo->newGood();
2418                 }
2419
2420                 $lockOwnsTrx = $this->file->lock();
2421
2422                 $dbw = $this->file->repo->getMasterDB();
2423                 $status = $this->file->repo->newGood();
2424
2425                 $exists = (bool)$dbw->selectField( 'image', '1',
2426                         [ 'img_name' => $this->file->getName() ],
2427                         __METHOD__,
2428                         // The lock() should already prevents changes, but this still may need
2429                         // to bypass any transaction snapshot. However, if lock() started the
2430                         // trx (which it probably did) then snapshot is post-lock and up-to-date.
2431                         $lockOwnsTrx ? [] : [ 'LOCK IN SHARE MODE' ]
2432                 );
2433
2434                 // Fetch all or selected archived revisions for the file,
2435                 // sorted from the most recent to the oldest.
2436                 $conditions = [ 'fa_name' => $this->file->getName() ];
2437
2438                 if ( !$this->all ) {
2439                         $conditions['fa_id'] = $this->ids;
2440                 }
2441
2442                 $result = $dbw->select(
2443                         'filearchive',
2444                         ArchivedFile::selectFields(),
2445                         $conditions,
2446                         __METHOD__,
2447                         [ 'ORDER BY' => 'fa_timestamp DESC' ]
2448                 );
2449
2450                 $idsPresent = [];
2451                 $storeBatch = [];
2452                 $insertBatch = [];
2453                 $insertCurrent = false;
2454                 $deleteIds = [];
2455                 $first = true;
2456                 $archiveNames = [];
2457
2458                 foreach ( $result as $row ) {
2459                         $idsPresent[] = $row->fa_id;
2460
2461                         if ( $row->fa_name != $this->file->getName() ) {
2462                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
2463                                 $status->failCount++;
2464                                 continue;
2465                         }
2466
2467                         if ( $row->fa_storage_key == '' ) {
2468                                 // Revision was missing pre-deletion
2469                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
2470                                 $status->failCount++;
2471                                 continue;
2472                         }
2473
2474                         $deletedRel = $repo->getDeletedHashPath( $row->fa_storage_key ) .
2475                                 $row->fa_storage_key;
2476                         $deletedUrl = $repo->getVirtualUrl() . '/deleted/' . $deletedRel;
2477
2478                         if ( isset( $row->fa_sha1 ) ) {
2479                                 $sha1 = $row->fa_sha1;
2480                         } else {
2481                                 // old row, populate from key
2482                                 $sha1 = LocalRepo::getHashFromKey( $row->fa_storage_key );
2483                         }
2484
2485                         # Fix leading zero
2486                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
2487                                 $sha1 = substr( $sha1, 1 );
2488                         }
2489
2490                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
2491                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
2492                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
2493                                 || is_null( $row->fa_metadata )
2494                         ) {
2495                                 // Refresh our metadata
2496                                 // Required for a new current revision; nice for older ones too. :)
2497                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
2498                         } else {
2499                                 $props = [
2500                                         'minor_mime' => $row->fa_minor_mime,
2501                                         'major_mime' => $row->fa_major_mime,
2502                                         'media_type' => $row->fa_media_type,
2503                                         'metadata' => $row->fa_metadata
2504                                 ];
2505                         }
2506
2507                         if ( $first && !$exists ) {
2508                                 // This revision will be published as the new current version
2509                                 $destRel = $this->file->getRel();
2510                                 $insertCurrent = [
2511                                         'img_name' => $row->fa_name,
2512                                         'img_size' => $row->fa_size,
2513                                         'img_width' => $row->fa_width,
2514                                         'img_height' => $row->fa_height,
2515                                         'img_metadata' => $props['metadata'],
2516                                         'img_bits' => $row->fa_bits,
2517                                         'img_media_type' => $props['media_type'],
2518                                         'img_major_mime' => $props['major_mime'],
2519                                         'img_minor_mime' => $props['minor_mime'],
2520                                         'img_description' => $row->fa_description,
2521                                         'img_user' => $row->fa_user,
2522                                         'img_user_text' => $row->fa_user_text,
2523                                         'img_timestamp' => $row->fa_timestamp,
2524                                         'img_sha1' => $sha1
2525                                 ];
2526
2527                                 // The live (current) version cannot be hidden!
2528                                 if ( !$this->unsuppress && $row->fa_deleted ) {
2529                                         $storeBatch[] = [ $deletedUrl, 'public', $destRel ];
2530                                         $this->cleanupBatch[] = $row->fa_storage_key;
2531                                 }
2532                         } else {
2533                                 $archiveName = $row->fa_archive_name;
2534
2535                                 if ( $archiveName == '' ) {
2536                                         // This was originally a current version; we
2537                                         // have to devise a new archive name for it.
2538                                         // Format is <timestamp of archiving>!<name>
2539                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
2540
2541                                         do {
2542                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
2543                                                 $timestamp++;
2544                                         } while ( isset( $archiveNames[$archiveName] ) );
2545                                 }
2546
2547                                 $archiveNames[$archiveName] = true;
2548                                 $destRel = $this->file->getArchiveRel( $archiveName );
2549                                 $insertBatch[] = [
2550                                         'oi_name' => $row->fa_name,
2551                                         'oi_archive_name' => $archiveName,
2552                                         'oi_size' => $row->fa_size,
2553                                         'oi_width' => $row->fa_width,
2554                                         'oi_height' => $row->fa_height,
2555                                         'oi_bits' => $row->fa_bits,
2556                                         'oi_description' => $row->fa_description,
2557                                         'oi_user' => $row->fa_user,
2558                                         'oi_user_text' => $row->fa_user_text,
2559                                         'oi_timestamp' => $row->fa_timestamp,
2560                                         'oi_metadata' => $props['metadata'],
2561                                         'oi_media_type' => $props['media_type'],
2562                                         'oi_major_mime' => $props['major_mime'],
2563                                         'oi_minor_mime' => $props['minor_mime'],
2564                                         'oi_deleted' => $this->unsuppress ? 0 : $row->fa_deleted,
2565                                         'oi_sha1' => $sha1 ];
2566                         }
2567
2568                         $deleteIds[] = $row->fa_id;
2569
2570                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
2571                                 // private files can stay where they are
2572                                 $status->successCount++;
2573                         } else {
2574                                 $storeBatch[] = [ $deletedUrl, 'public', $destRel ];
2575                                 $this->cleanupBatch[] = $row->fa_storage_key;
2576                         }
2577
2578                         $first = false;
2579                 }
2580
2581                 unset( $result );
2582
2583                 // Add a warning to the status object for missing IDs
2584                 $missingIds = array_diff( $this->ids, $idsPresent );
2585
2586                 foreach ( $missingIds as $id ) {
2587                         $status->error( 'undelete-missing-filearchive', $id );
2588                 }
2589
2590                 if ( !$repo->hasSha1Storage() ) {
2591                         // Remove missing files from batch, so we don't get errors when undeleting them
2592                         $checkStatus = $this->removeNonexistentFiles( $storeBatch );
2593                         if ( !$checkStatus->isGood() ) {
2594                                 $status->merge( $checkStatus );
2595                                 return $status;
2596                         }
2597                         $storeBatch = $checkStatus->value;
2598
2599                         // Run the store batch
2600                         // Use the OVERWRITE_SAME flag to smooth over a common error
2601                         $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
2602                         $status->merge( $storeStatus );
2603
2604                         if ( !$status->isGood() ) {
2605                                 // Even if some files could be copied, fail entirely as that is the
2606                                 // easiest thing to do without data loss
2607                                 $this->cleanupFailedBatch( $storeStatus, $storeBatch );
2608                                 $status->ok = false;
2609                                 $this->file->unlock();
2610
2611                                 return $status;
2612                         }
2613                 }
2614
2615                 // Run the DB updates
2616                 // Because we have locked the image row, key conflicts should be rare.
2617                 // If they do occur, we can roll back the transaction at this time with
2618                 // no data loss, but leaving unregistered files scattered throughout the
2619                 // public zone.
2620                 // This is not ideal, which is why it's important to lock the image row.
2621                 if ( $insertCurrent ) {
2622                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
2623                 }
2624
2625                 if ( $insertBatch ) {
2626                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
2627                 }
2628
2629                 if ( $deleteIds ) {
2630                         $dbw->delete( 'filearchive',
2631                                 [ 'fa_id' => $deleteIds ],
2632                                 __METHOD__ );
2633                 }
2634
2635                 // If store batch is empty (all files are missing), deletion is to be considered successful
2636                 if ( $status->successCount > 0 || !$storeBatch || $repo->hasSha1Storage() ) {
2637                         if ( !$exists ) {
2638                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
2639
2640                                 DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => 1 ] ) );
2641
2642                                 $this->file->purgeEverything();
2643                         } else {
2644                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
2645                                 $this->file->purgeDescription();
2646                         }
2647                 }
2648
2649                 $this->file->unlock();
2650
2651                 return $status;
2652         }
2653
2654         /**
2655          * Removes non-existent files from a store batch.
2656          * @param array $triplets
2657          * @return Status
2658          */
2659         protected function removeNonexistentFiles( $triplets ) {
2660                 $files = $filteredTriplets = [];
2661                 foreach ( $triplets as $file ) {
2662                         $files[$file[0]] = $file[0];
2663                 }
2664
2665                 $result = $this->file->repo->fileExistsBatch( $files );
2666                 if ( in_array( null, $result, true ) ) {
2667                         return Status::newFatal( 'backend-fail-internal',
2668                                 $this->file->repo->getBackend()->getName() );
2669                 }
2670
2671                 foreach ( $triplets as $file ) {
2672                         if ( $result[$file[0]] ) {
2673                                 $filteredTriplets[] = $file;
2674                         }
2675                 }
2676
2677                 return Status::newGood( $filteredTriplets );
2678         }
2679
2680         /**
2681          * Removes non-existent files from a cleanup batch.
2682          * @param array $batch
2683          * @return array
2684          */
2685         protected function removeNonexistentFromCleanup( $batch ) {
2686                 $files = $newBatch = [];
2687                 $repo = $this->file->repo;
2688
2689                 foreach ( $batch as $file ) {
2690                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
2691                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
2692                 }
2693
2694                 $result = $repo->fileExistsBatch( $files );
2695
2696                 foreach ( $batch as $file ) {
2697                         if ( $result[$file] ) {
2698                                 $newBatch[] = $file;
2699                         }
2700                 }
2701
2702                 return $newBatch;
2703         }
2704
2705         /**
2706          * Delete unused files in the deleted zone.
2707          * This should be called from outside the transaction in which execute() was called.
2708          * @return FileRepoStatus
2709          */
2710         public function cleanup() {
2711                 if ( !$this->cleanupBatch ) {
2712                         return $this->file->repo->newGood();
2713                 }
2714
2715                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
2716
2717                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
2718
2719                 return $status;
2720         }
2721
2722         /**
2723          * Cleanup a failed batch. The batch was only partially successful, so
2724          * rollback by removing all items that were succesfully copied.
2725          *
2726          * @param Status $storeStatus
2727          * @param array $storeBatch
2728          */
2729         protected function cleanupFailedBatch( $storeStatus, $storeBatch ) {
2730                 $cleanupBatch = [];
2731
2732                 foreach ( $storeStatus->success as $i => $success ) {
2733                         // Check if this item of the batch was successfully copied
2734                         if ( $success ) {
2735                                 // Item was successfully copied and needs to be removed again
2736                                 // Extract ($dstZone, $dstRel) from the batch
2737                                 $cleanupBatch[] = [ $storeBatch[$i][1], $storeBatch[$i][2] ];
2738                         }
2739                 }
2740                 $this->file->repo->cleanupBatch( $cleanupBatch );
2741         }
2742 }
2743
2744 # ------------------------------------------------------------------------------
2745
2746 /**
2747  * Helper class for file movement
2748  * @ingroup FileAbstraction
2749  */
2750 class LocalFileMoveBatch {
2751         /** @var LocalFile */
2752         protected $file;
2753
2754         /** @var Title */
2755         protected $target;
2756
2757         protected $cur;
2758
2759         protected $olds;
2760
2761         protected $oldCount;
2762
2763         protected $archive;
2764
2765         /** @var DatabaseBase */
2766         protected $db;
2767
2768         /**
2769          * @param File $file
2770          * @param Title $target
2771          */
2772         function __construct( File $file, Title $target ) {
2773                 $this->file = $file;
2774                 $this->target = $target;
2775                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
2776                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
2777                 $this->oldName = $this->file->getName();
2778                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2779                 $this->oldRel = $this->oldHash . $this->oldName;
2780                 $this->newRel = $this->newHash . $this->newName;
2781                 $this->db = $file->getRepo()->getMasterDB();
2782         }
2783
2784         /**
2785          * Add the current image to the batch
2786          */
2787         public function addCurrent() {
2788                 $this->cur = [ $this->oldRel, $this->newRel ];
2789         }
2790
2791         /**
2792          * Add the old versions of the image to the batch
2793          * @return array List of archive names from old versions
2794          */
2795         public function addOlds() {
2796                 $archiveBase = 'archive';
2797                 $this->olds = [];
2798                 $this->oldCount = 0;
2799                 $archiveNames = [];
2800
2801                 $result = $this->db->select( 'oldimage',
2802                         [ 'oi_archive_name', 'oi_deleted' ],
2803                         [ 'oi_name' => $this->oldName ],
2804                         __METHOD__,
2805                         [ 'LOCK IN SHARE MODE' ] // ignore snapshot
2806                 );
2807
2808                 foreach ( $result as $row ) {
2809                         $archiveNames[] = $row->oi_archive_name;
2810                         $oldName = $row->oi_archive_name;
2811                         $bits = explode( '!', $oldName, 2 );
2812
2813                         if ( count( $bits ) != 2 ) {
2814                                 wfDebug( "Old file name missing !: '$oldName' \n" );
2815                                 continue;
2816                         }
2817
2818                         list( $timestamp, $filename ) = $bits;
2819
2820                         if ( $this->oldName != $filename ) {
2821                                 wfDebug( "Old file name doesn't match: '$oldName' \n" );
2822                                 continue;
2823                         }
2824
2825                         $this->oldCount++;
2826
2827                         // Do we want to add those to oldCount?
2828                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2829                                 continue;
2830                         }
2831
2832                         $this->olds[] = [
2833                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2834                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2835                         ];
2836                 }
2837
2838                 return $archiveNames;
2839         }
2840
2841         /**
2842          * Perform the move.
2843          * @return FileRepoStatus
2844          */
2845         public function execute() {
2846                 $repo = $this->file->repo;
2847                 $status = $repo->newGood();
2848
2849                 $triplets = $this->getMoveTriplets();
2850                 $checkStatus = $this->removeNonexistentFiles( $triplets );
2851                 if ( !$checkStatus->isGood() ) {
2852                         $status->merge( $checkStatus );
2853                         return $status;
2854                 }
2855                 $triplets = $checkStatus->value;
2856                 $destFile = wfLocalFile( $this->target );
2857
2858                 $this->file->lock(); // begin
2859                 $destFile->lock(); // quickly fail if destination is not available
2860                 // Rename the file versions metadata in the DB.
2861                 // This implicitly locks the destination file, which avoids race conditions.
2862                 // If we moved the files from A -> C before DB updates, another process could
2863                 // move files from B -> C at this point, causing storeBatch() to fail and thus
2864                 // cleanupTarget() to trigger. It would delete the C files and cause data loss.
2865                 $statusDb = $this->doDBUpdates();
2866                 if ( !$statusDb->isGood() ) {
2867                         $destFile->unlock();
2868                         $this->file->unlockAndRollback();
2869                         $statusDb->ok = false;
2870
2871                         return $statusDb;
2872                 }
2873                 wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: " .
2874                         "{$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2875
2876                 if ( !$repo->hasSha1Storage() ) {
2877                         // Copy the files into their new location.
2878                         // If a prior process fataled copying or cleaning up files we tolerate any
2879                         // of the existing files if they are identical to the ones being stored.
2880                         $statusMove = $repo->storeBatch( $triplets, FileRepo::OVERWRITE_SAME );
2881                         wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: " .
2882                                 "{$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2883                         if ( !$statusMove->isGood() ) {
2884                                 // Delete any files copied over (while the destination is still locked)
2885                                 $this->cleanupTarget( $triplets );
2886                                 $destFile->unlock();
2887                                 $this->file->unlockAndRollback(); // unlocks the destination
2888                                 wfDebugLog( 'imagemove', "Error in moving files: "
2889                                         . $statusMove->getWikiText( false, false, 'en' ) );
2890                                 $statusMove->ok = false;
2891
2892                                 return $statusMove;
2893                         }
2894                         $status->merge( $statusMove );
2895                 }
2896
2897                 $destFile->unlock();
2898                 $this->file->unlock(); // done
2899
2900                 // Everything went ok, remove the source files
2901                 $this->cleanupSource( $triplets );
2902
2903                 $status->merge( $statusDb );
2904
2905                 return $status;
2906         }
2907
2908         /**
2909          * Do the database updates and return a new FileRepoStatus indicating how
2910          * many rows where updated.
2911          *
2912          * @return FileRepoStatus
2913          */
2914         protected function doDBUpdates() {
2915                 $repo = $this->file->repo;
2916                 $status = $repo->newGood();
2917                 $dbw = $this->db;
2918
2919                 // Update current image
2920                 $dbw->update(
2921                         'image',
2922                         [ 'img_name' => $this->newName ],
2923                         [ 'img_name' => $this->oldName ],
2924                         __METHOD__
2925                 );
2926
2927                 if ( $dbw->affectedRows() ) {
2928                         $status->successCount++;
2929                 } else {
2930                         $status->failCount++;
2931                         $status->fatal( 'imageinvalidfilename' );
2932
2933                         return $status;
2934                 }
2935
2936                 // Update old images
2937                 $dbw->update(
2938                         'oldimage',
2939                         [
2940                                 'oi_name' => $this->newName,
2941                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name',
2942                                         $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2943                         ],
2944                         [ 'oi_name' => $this->oldName ],
2945                         __METHOD__
2946                 );
2947
2948                 $affected = $dbw->affectedRows();
2949                 $total = $this->oldCount;
2950                 $status->successCount += $affected;
2951                 // Bug 34934: $total is based on files that actually exist.
2952                 // There may be more DB rows than such files, in which case $affected
2953                 // can be greater than $total. We use max() to avoid negatives here.
2954                 $status->failCount += max( 0, $total - $affected );
2955                 if ( $status->failCount ) {
2956                         $status->error( 'imageinvalidfilename' );
2957                 }
2958
2959                 return $status;
2960         }
2961
2962         /**
2963          * Generate triplets for FileRepo::storeBatch().
2964          * @return array
2965          */
2966         protected function getMoveTriplets() {
2967                 $moves = array_merge( [ $this->cur ], $this->olds );
2968                 $triplets = []; // The format is: (srcUrl, destZone, destUrl)
2969
2970                 foreach ( $moves as $move ) {
2971                         // $move: (oldRelativePath, newRelativePath)
2972                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2973                         $triplets[] = [ $srcUrl, 'public', $move[1] ];
2974                         wfDebugLog(
2975                                 'imagemove',
2976                                 "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}"
2977                         );
2978                 }
2979
2980                 return $triplets;
2981         }
2982
2983         /**
2984          * Removes non-existent files from move batch.
2985          * @param array $triplets
2986          * @return Status
2987          */
2988         protected function removeNonexistentFiles( $triplets ) {
2989                 $files = [];
2990
2991                 foreach ( $triplets as $file ) {
2992                         $files[$file[0]] = $file[0];
2993                 }
2994
2995                 $result = $this->file->repo->fileExistsBatch( $files );
2996                 if ( in_array( null, $result, true ) ) {
2997                         return Status::newFatal( 'backend-fail-internal',
2998                                 $this->file->repo->getBackend()->getName() );
2999                 }
3000
3001                 $filteredTriplets = [];
3002                 foreach ( $triplets as $file ) {
3003                         if ( $result[$file[0]] ) {
3004                                 $filteredTriplets[] = $file;
3005                         } else {
3006                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
3007                         }
3008                 }
3009
3010                 return Status::newGood( $filteredTriplets );
3011         }
3012
3013         /**
3014          * Cleanup a partially moved array of triplets by deleting the target
3015          * files. Called if something went wrong half way.
3016          * @param array $triplets
3017          */
3018         protected function cleanupTarget( $triplets ) {
3019                 // Create dest pairs from the triplets
3020                 $pairs = [];
3021                 foreach ( $triplets as $triplet ) {
3022                         // $triplet: (old source virtual URL, dst zone, dest rel)
3023                         $pairs[] = [ $triplet[1], $triplet[2] ];
3024                 }
3025
3026                 $this->file->repo->cleanupBatch( $pairs );
3027         }
3028
3029         /**
3030          * Cleanup a fully moved array of triplets by deleting the source files.
3031          * Called at the end of the move process if everything else went ok.
3032          * @param array $triplets
3033          */
3034         protected function cleanupSource( $triplets ) {
3035                 // Create source file names from the triplets
3036                 $files = [];
3037                 foreach ( $triplets as $triplet ) {
3038                         $files[] = $triplet[0];
3039                 }
3040
3041                 $this->file->repo->cleanupBatch( $files );
3042         }
3043 }
3044
3045 class LocalFileLockError extends ErrorPageError {
3046         public function __construct( Status $status ) {
3047                 parent::__construct(
3048                         'actionfailed',
3049                         $status->getMessage()
3050                 );
3051         }
3052
3053         public function report() {
3054                 global $wgOut;
3055                 $wgOut->setStatusCode( 429 );
3056                 parent::report();
3057         }
3058 }