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 use \MediaWiki\Logger\LoggerFactory;
  25
  26 /**
  27  * Bump this number when serialized cache records may be incompatible.
  28  */
  29 define( 'MW_FILE_VERSION', 9 );
  30
  31 /**
  32  * Class to represent a local file in the wiki's own database
  33  *
  34  * Provides methods to retrieve paths (physical, logical, URL),
  35  * to generate image thumbnails or for uploading.
  36  *
  37  * Note that only the repo object knows what its file class is called. You should
  38  * never name a file class explictly outside of the repo class. Instead use the
  39  * repo's factory functions to generate file objects, for example:
  40  *
  41  * RepoGroup::singleton()->getLocalRepo()->newFile( $title );
  42  *
  43  * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
  44  * in most cases.
  45  *
  46  * @ingroup FileAbstraction
  47  */
  48 class LocalFile extends File {
  49         const CACHE_FIELD_MAX_LEN = 1000;
  50
  51         /** @var bool Does the file exist on disk? (loadFromXxx) */
  52         protected $fileExists;
  53
  54         /** @var int Image width */
  55         protected $width;
  56
  57         /** @var int Image height */
  58         protected $height;
  59
  60         /** @var int Returned by getimagesize (loadFromXxx) */
  61         protected $bits;
  62
  63         /** @var string MEDIATYPE_xxx (bitmap, drawing, audio...) */
  64         protected $media_type;
  65
  66         /** @var string MIME type, determined by MimeMagic::guessMimeType */
  67         protected $mime;
  68
  69         /** @var int Size in bytes (loadFromXxx) */
  70         protected $size;
  71
  72         /** @var string Handler-specific metadata */
  73         protected $metadata;
  74
  75         /** @var string SHA-1 base 36 content hash */
  76         protected $sha1;
  77
  78         /** @var bool Whether or not core data has been loaded from the database (loadFromXxx) */
  79         protected $dataLoaded;
  80
  81         /** @var bool Whether or not lazy-loaded data has been loaded from the database */
  82         protected $extraDataLoaded;
  83
  84         /** @var int Bitfield akin to rev_deleted */
  85         protected $deleted;
  86
  87         /** @var string */
  88         protected $repoClass = 'LocalRepo';
  89
  90         /** @var int Number of line to return by nextHistoryLine() (constructor) */
  91         private $historyLine;
  92
  93         /** @var int Result of the query for the file's history (nextHistoryLine) */
  94         private $historyRes;
  95
  96         /** @var string Major MIME type */
  97         private $major_mime;
  98
  99         /** @var string Minor MIME type */
 100         private $minor_mime;
 101
 102         /** @var string Upload timestamp */
 103         private $timestamp;
 104
 105         /** @var int User ID of uploader */
 106         private $user;
 107
 108         /** @var string User name of uploader */
 109         private $user_text;
 110
 111         /** @var string Description of current revision of the file */
 112         private $description;
 113
 114         /** @var string TS_MW timestamp of the last change of the file description */
 115         private $descriptionTouched;
 116
 117         /** @var bool Whether the row was upgraded on load */
 118         private $upgraded;
 119
 120         /** @var bool True if the image row is locked */
 121         private $locked;
 122
 123         /** @var bool True if the image row is locked with a lock initiated transaction */
 124         private $lockedOwnTrx;
 125
 126         /** @var bool True if file is not present in file system. Not to be cached in memcached */
 127         private $missing;
 128
 129         // @note: higher than IDBAccessObject constants
 130         const LOAD_ALL = 16; // integer; load all the lazy fields too (like metadata)
 131
 132         const ATOMIC_SECTION_LOCK = 'LocalFile::lockingTransaction';
 133
 134         /**
 135          * Create a LocalFile from a title
 136          * Do not call this except from inside a repo class.
 137          *
 138          * Note: $unused param is only here to avoid an E_STRICT
 139          *
 140          * @param Title $title
 141          * @param FileRepo $repo
 142          * @param null $unused
 143          *
 144          * @return LocalFile
 145          */
 146         static function newFromTitle( $title, $repo, $unused = null ) {
 147                 return new self( $title, $repo );
 148         }
 149
 150         /**
 151          * Create a LocalFile from a title
 152          * Do not call this except from inside a repo class.
 153          *
 154          * @param stdClass $row
 155          * @param FileRepo $repo
 156          *
 157          * @return LocalFile
 158          */
 159         static function newFromRow( $row, $repo ) {
 160                 $title = Title::makeTitle( NS_FILE, $row->img_name );
 161                 $file = new self( $title, $repo );
 162                 $file->loadFromRow( $row );
 163
 164                 return $file;
 165         }
 166
 167         /**
 168          * Create a LocalFile from a SHA-1 key
 169          * Do not call this except from inside a repo class.
 170          *
 171          * @param string $sha1 Base-36 SHA-1
 172          * @param LocalRepo $repo
 173          * @param string|bool $timestamp MW_timestamp (optional)
 174          * @return bool|LocalFile
 175          */
 176         static function newFromKey( $sha1, $repo, $timestamp = false ) {
 177                 $dbr = $repo->getSlaveDB();
 178
 179                 $conds = [ 'img_sha1' => $sha1 ];
 180                 if ( $timestamp ) {
 181                         $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
 182                 }
 183
 184                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
 185                 if ( $row ) {
 186                         return self::newFromRow( $row, $repo );
 187                 } else {
 188                         return false;
 189                 }
 190         }
 191
 192         /**
 193          * Fields in the image table
 194          * @return array
 195          */
 196         static function selectFields() {
 197                 return [
 198                         'img_name',
 199                         'img_size',
 200                         'img_width',
 201                         'img_height',
 202                         'img_metadata',
 203                         'img_bits',
 204                         'img_media_type',
 205                         'img_major_mime',
 206                         'img_minor_mime',
 207                         'img_description',
 208                         'img_user',
 209                         'img_user_text',
 210                         'img_timestamp',
 211                         'img_sha1',
 212                 ];
 213         }
 214
 215         /**
 216          * Constructor.
 217          * Do not call this except from inside a repo class.
 218          * @param Title $title
 219          * @param FileRepo $repo
 220          */
 221         function __construct( $title, $repo ) {
 222                 parent::__construct( $title, $repo );
 223
 224                 $this->metadata = '';
 225                 $this->historyLine = 0;
 226                 $this->historyRes = null;
 227                 $this->dataLoaded = false;
 228                 $this->extraDataLoaded = false;
 229
 230                 $this->assertRepoDefined();
 231                 $this->assertTitleDefined();
 232         }
 233
 234         /**
 235          * Get the memcached key for the main data for this file, or false if
 236          * there is no access to the shared cache.
 237          * @return string|bool
 238          */
 239         function getCacheKey() {
 240                 $hashedName = md5( $this->getName() );
 241
 242                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 243         }
 244
 245         /**
 246          * Try to load file metadata from memcached. Returns true on success.
 247          * @return bool
 248          */
 249         private function loadFromCache() {
 250                 $this->dataLoaded = false;
 251                 $this->extraDataLoaded = false;
 252                 $key = $this->getCacheKey();
 253
 254                 if ( !$key ) {
 255                         return false;
 256                 }
 257
 258                 $cache = ObjectCache::getMainWANInstance();
 259                 $cachedValues = $cache->get( $key );
 260
 261                 // Check if the key existed and belongs to this version of MediaWiki
 262                 if ( is_array( $cachedValues ) && $cachedValues['version'] == MW_FILE_VERSION ) {
 263                         $this->fileExists = $cachedValues['fileExists'];
 264                         if ( $this->fileExists ) {
 265                                 $this->setProps( $cachedValues );
 266                         }
 267                         $this->dataLoaded = true;
 268                         $this->extraDataLoaded = true;
 269                         foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 270                                 $this->extraDataLoaded = $this->extraDataLoaded && isset( $cachedValues[$field] );
 271                         }
 272                 }
 273
 274                 return $this->dataLoaded;
 275         }
 276
 277         /**
 278          * Save the file metadata to memcached
 279          */
 280         private function saveToCache() {
 281                 $this->load();
 282
 283                 $key = $this->getCacheKey();
 284                 if ( !$key ) {
 285                         return;
 286                 }
 287
 288                 $fields = $this->getCacheFields( '' );
 289                 $cacheVal = [ 'version' => MW_FILE_VERSION ];
 290                 $cacheVal['fileExists'] = $this->fileExists;
 291
 292                 if ( $this->fileExists ) {
 293                         foreach ( $fields as $field ) {
 294                                 $cacheVal[$field] = $this->$field;
 295                         }
 296                 }
 297
 298                 // Strip off excessive entries from the subset of fields that can become large.
 299                 // If the cache value gets to large it will not fit in memcached and nothing will
 300                 // get cached at all, causing master queries for any file access.
 301                 foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 302                         if ( isset( $cacheVal[$field] ) && strlen( $cacheVal[$field] ) > 100 * 1024 ) {
 303                                 unset( $cacheVal[$field] ); // don't let the value get too big
 304                         }
 305                 }
 306
 307                 // Cache presence for 1 week and negatives for 1 day
 308                 $ttl = $this->fileExists ? 86400 * 7 : 86400;
 309                 $opts = Database::getCacheSetOptions( $this->repo->getSlaveDB() );
 310                 ObjectCache::getMainWANInstance()->set( $key, $cacheVal, $ttl, $opts );
 311         }
 312
 313         /**
 314          * Purge the file object/metadata cache
 315          */
 316         public function invalidateCache() {
 317                 $key = $this->getCacheKey();
 318                 if ( !$key ) {
 319                         return;
 320                 }
 321
 322                 $this->repo->getMasterDB()->onTransactionPreCommitOrIdle( function() use ( $key ) {
 323                         ObjectCache::getMainWANInstance()->delete( $key );
 324                 } );
 325         }
 326
 327         /**
 328          * Load metadata from the file itself
 329          */
 330         function loadFromFile() {
 331                 $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 332                 $this->setProps( $props );
 333         }
 334
 335         /**
 336          * @param string $prefix
 337          * @return array
 338          */
 339         function getCacheFields( $prefix = 'img_' ) {
 340                 static $fields = [ 'size', 'width', 'height', 'bits', 'media_type',
 341                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user',
 342                         'user_text', 'description' ];
 343                 static $results = [];
 344
 345                 if ( $prefix == '' ) {
 346                         return $fields;
 347                 }
 348
 349                 if ( !isset( $results[$prefix] ) ) {
 350                         $prefixedFields = [];
 351                         foreach ( $fields as $field ) {
 352                                 $prefixedFields[] = $prefix . $field;
 353                         }
 354                         $results[$prefix] = $prefixedFields;
 355                 }
 356
 357                 return $results[$prefix];
 358         }
 359
 360         /**
 361          * @param string $prefix
 362          * @return array
 363          */
 364         function getLazyCacheFields( $prefix = 'img_' ) {
 365                 static $fields = [ 'metadata' ];
 366                 static $results = [];
 367
 368                 if ( $prefix == '' ) {
 369                         return $fields;
 370                 }
 371
 372                 if ( !isset( $results[$prefix] ) ) {
 373                         $prefixedFields = [];
 374                         foreach ( $fields as $field ) {
 375                                 $prefixedFields[] = $prefix . $field;
 376                         }
 377                         $results[$prefix] = $prefixedFields;
 378                 }
 379
 380                 return $results[$prefix];
 381         }
 382
 383         /**
 384          * Load file metadata from the DB
 385          * @param int $flags
 386          */
 387         function loadFromDB( $flags = 0 ) {
 388                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 389
 390                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 391                 $this->dataLoaded = true;
 392                 $this->extraDataLoaded = true;
 393
 394                 $dbr = ( $flags & self::READ_LATEST )
 395                         ? $this->repo->getMasterDB()
 396                         : $this->repo->getSlaveDB();
 397
 398                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 399                         [ 'img_name' => $this->getName() ], $fname );
 400
 401                 if ( $row ) {
 402                         $this->loadFromRow( $row );
 403                 } else {
 404                         $this->fileExists = false;
 405                 }
 406         }
 407
 408         /**
 409          * Load lazy file metadata from the DB.
 410          * This covers fields that are sometimes not cached.
 411          */
 412         protected function loadExtraFromDB() {
 413                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 414
 415                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 416                 $this->extraDataLoaded = true;
 417
 418                 $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getSlaveDB(), $fname );
 419                 if ( !$fieldMap ) {
 420                         $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getMasterDB(), $fname );
 421                 }
 422
 423                 if ( $fieldMap ) {
 424                         foreach ( $fieldMap as $name => $value ) {
 425                                 $this->$name = $value;
 426                         }
 427                 } else {
 428                         throw new MWException( "Could not find data for image '{$this->getName()}'." );
 429                 }
 430         }
 431
 432         /**
 433          * @param IDatabase $dbr
 434          * @param string $fname
 435          * @return array|bool
 436          */
 437         private function loadFieldsWithTimestamp( $dbr, $fname ) {
 438                 $fieldMap = false;
 439
 440                 $row = $dbr->selectRow( 'image', $this->getLazyCacheFields( 'img_' ),
 441                         [ 'img_name' => $this->getName(), 'img_timestamp' => $this->getTimestamp() ],
 442                         $fname );
 443                 if ( $row ) {
 444                         $fieldMap = $this->unprefixRow( $row, 'img_' );
 445                 } else {
 446                         # File may have been uploaded over in the meantime; check the old versions
 447                         $row = $dbr->selectRow( 'oldimage', $this->getLazyCacheFields( 'oi_' ),
 448                                 [ 'oi_name' => $this->getName(), 'oi_timestamp' => $this->getTimestamp() ],
 449                                 $fname );
 450                         if ( $row ) {
 451                                 $fieldMap = $this->unprefixRow( $row, 'oi_' );
 452                         }
 453                 }
 454
 455                 return $fieldMap;
 456         }
 457
 458         /**
 459          * @param array|object $row
 460          * @param string $prefix
 461          * @throws MWException
 462          * @return array
 463          */
 464         protected function unprefixRow( $row, $prefix = 'img_' ) {
 465                 $array = (array)$row;
 466                 $prefixLength = strlen( $prefix );
 467
 468                 // Sanity check prefix once
 469                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 470                         throw new MWException( __METHOD__ . ': incorrect $prefix parameter' );
 471                 }
 472
 473                 $decoded = [];
 474                 foreach ( $array as $name => $value ) {
 475                         $decoded[substr( $name, $prefixLength )] = $value;
 476                 }
 477
 478                 return $decoded;
 479         }
 480
 481         /**
 482          * Decode a row from the database (either object or array) to an array
 483          * with timestamps and MIME types decoded, and the field prefix removed.
 484          * @param object $row
 485          * @param string $prefix
 486          * @throws MWException
 487          * @return array
 488          */
 489         function decodeRow( $row, $prefix = 'img_' ) {
 490                 $decoded = $this->unprefixRow( $row, $prefix );
 491
 492                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 493
 494                 $decoded['metadata'] = $this->repo->getSlaveDB()->decodeBlob( $decoded['metadata'] );
 495
 496                 if ( empty( $decoded['major_mime'] ) ) {
 497                         $decoded['mime'] = 'unknown/unknown';
 498                 } else {
 499                         if ( !$decoded['minor_mime'] ) {
 500                                 $decoded['minor_mime'] = 'unknown';
 501                         }
 502                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 503                 }
 504
 505                 // Trim zero padding from char/binary field
 506                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 507
 508                 // Normalize some fields to integer type, per their database definition.
 509                 // Use unary + so that overflows will be upgraded to double instead of
 510                 // being trucated as with intval(). This is important to allow >2GB
 511                 // files on 32-bit systems.
 512                 foreach ( [ 'size', 'width', 'height', 'bits' ] as $field ) {
 513                         $decoded[$field] = +$decoded[$field];
 514                 }
 515
 516                 return $decoded;
 517         }
 518
 519         /**
 520          * Load file metadata from a DB result row
 521          *
 522          * @param object $row
 523          * @param string $prefix
 524          */
 525         function loadFromRow( $row, $prefix = 'img_' ) {
 526                 $this->dataLoaded = true;
 527                 $this->extraDataLoaded = true;
 528
 529                 $array = $this->decodeRow( $row, $prefix );
 530
 531                 foreach ( $array as $name => $value ) {
 532                         $this->$name = $value;
 533                 }
 534
 535                 $this->fileExists = true;
 536                 $this->maybeUpgradeRow();
 537         }
 538
 539         /**
 540          * Load file metadata from cache or DB, unless already loaded
 541          * @param int $flags
 542          */
 543         function load( $flags = 0 ) {
 544                 if ( !$this->dataLoaded ) {
 545                         if ( ( $flags & self::READ_LATEST ) || !$this->loadFromCache() ) {
 546                                 $this->loadFromDB( $flags );
 547                                 $this->saveToCache();
 548                         }
 549                         $this->dataLoaded = true;
 550                 }
 551                 if ( ( $flags & self::LOAD_ALL ) && !$this->extraDataLoaded ) {
 552                         // @note: loads on name/timestamp to reduce race condition problems
 553                         $this->loadExtraFromDB();
 554                 }
 555         }
 556
 557         /**
 558          * Upgrade a row if it needs it
 559          */
 560         function maybeUpgradeRow() {
 561                 global $wgUpdateCompatibleMetadata;
 562                 if ( wfReadOnly() ) {
 563                         return;
 564                 }
 565
 566                 $upgrade = false;
 567                 if ( is_null( $this->media_type ) ||
 568                         $this->mime == 'image/svg'
 569                 ) {
 570                         $upgrade = true;
 571                 } else {
 572                         $handler = $this->getHandler();
 573                         if ( $handler ) {
 574                                 $validity = $handler->isMetadataValid( $this, $this->getMetadata() );
 575                                 if ( $validity === MediaHandler::METADATA_BAD
 576                                         || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata )
 577                                 ) {
 578                                         $upgrade = true;
 579                                 }
 580                         }
 581                 }
 582
 583                 if ( $upgrade ) {
 584                         try {
 585                                 $this->upgradeRow();
 586                         } catch ( LocalFileLockError $e ) {
 587                                 // let the other process handle it (or do it next time)
 588                         }
 589                         $this->upgraded = true; // avoid rework/retries
 590                 }
 591         }
 592
 593         function getUpgraded() {
 594                 return $this->upgraded;
 595         }
 596
 597         /**
 598          * Fix assorted version-related problems with the image row by reloading it from the file
 599          */
 600         function upgradeRow() {
 601                 $this->lock(); // begin
 602
 603                 $this->loadFromFile();
 604
 605                 # Don't destroy file info of missing files
 606                 if ( !$this->fileExists ) {
 607                         $this->unlock();
 608                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 609
 610                         return;
 611                 }
 612
 613                 $dbw = $this->repo->getMasterDB();
 614                 list( $major, $minor ) = self::splitMime( $this->mime );
 615
 616                 if ( wfReadOnly() ) {
 617                         $this->unlock();
 618
 619                         return;
 620                 }
 621                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 622
 623                 $dbw->update( 'image',
 624                         [
 625                                 'img_size' => $this->size, // sanity
 626                                 'img_width' => $this->width,
 627                                 'img_height' => $this->height,
 628                                 'img_bits' => $this->bits,
 629                                 'img_media_type' => $this->media_type,
 630                                 'img_major_mime' => $major,
 631                                 'img_minor_mime' => $minor,
 632                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
 633                                 'img_sha1' => $this->sha1,
 634                         ],
 635                         [ 'img_name' => $this->getName() ],
 636                         __METHOD__
 637                 );
 638
 639                 $this->invalidateCache();
 640
 641                 $this->unlock(); // done
 642
 643         }
 644
 645         /**
 646          * Set properties in this object to be equal to those given in the
 647          * associative array $info. Only cacheable fields can be set.
 648          * All fields *must* be set in $info except for getLazyCacheFields().
 649          *
 650          * If 'mime' is given, it will be split into major_mime/minor_mime.
 651          * If major_mime/minor_mime are given, $this->mime will also be set.
 652          *
 653          * @param array $info
 654          */
 655         function setProps( $info ) {
 656                 $this->dataLoaded = true;
 657                 $fields = $this->getCacheFields( '' );
 658                 $fields[] = 'fileExists';
 659
 660                 foreach ( $fields as $field ) {
 661                         if ( isset( $info[$field] ) ) {
 662                                 $this->$field = $info[$field];
 663                         }
 664                 }
 665
 666                 // Fix up mime fields
 667                 if ( isset( $info['major_mime'] ) ) {
 668                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 669                 } elseif ( isset( $info['mime'] ) ) {
 670                         $this->mime = $info['mime'];
 671                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 672                 }
 673         }
 674
 675         /** splitMime inherited */
 676         /** getName inherited */
 677         /** getTitle inherited */
 678         /** getURL inherited */
 679         /** getViewURL inherited */
 680         /** getPath inherited */
 681         /** isVisible inherited */
 682
 683         /**
 684          * @return bool
 685          */
 686         function isMissing() {
 687                 if ( $this->missing === null ) {
 688                         list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl() );
 689                         $this->missing = !$fileExists;
 690                 }
 691
 692                 return $this->missing;
 693         }
 694
 695         /**
 696          * Return the width of the image
 697          *
 698          * @param int $page
 699          * @return int
 700          */
 701         public function getWidth( $page = 1 ) {
 702                 $this->load();
 703
 704                 if ( $this->isMultipage() ) {
 705                         $handler = $this->getHandler();
 706                         if ( !$handler ) {
 707                                 return 0;
 708                         }
 709                         $dim = $handler->getPageDimensions( $this, $page );
 710                         if ( $dim ) {
 711                                 return $dim['width'];
 712                         } else {
 713                                 // For non-paged media, the false goes through an
 714                                 // intval, turning failure into 0, so do same here.
 715                                 return 0;
 716                         }
 717                 } else {
 718                         return $this->width;
 719                 }
 720         }
 721
 722         /**
 723          * Return the height of the image
 724          *
 725          * @param int $page
 726          * @return int
 727          */
 728         public function getHeight( $page = 1 ) {
 729                 $this->load();
 730
 731                 if ( $this->isMultipage() ) {
 732                         $handler = $this->getHandler();
 733                         if ( !$handler ) {
 734                                 return 0;
 735                         }
 736                         $dim = $handler->getPageDimensions( $this, $page );
 737                         if ( $dim ) {
 738                                 return $dim['height'];
 739                         } else {
 740                                 // For non-paged media, the false goes through an
 741                                 // intval, turning failure into 0, so do same here.
 742                                 return 0;
 743                         }
 744                 } else {
 745                         return $this->height;
 746                 }
 747         }
 748
 749         /**
 750          * Returns ID or name of user who uploaded the file
 751          *
 752          * @param string $type 'text' or 'id'
 753          * @return int|string
 754          */
 755         function getUser( $type = 'text' ) {
 756                 $this->load();
 757
 758                 if ( $type == 'text' ) {
 759                         return $this->user_text;
 760                 } elseif ( $type == 'id' ) {
 761                         return (int)$this->user;
 762                 }
 763         }
 764
 765         /**
 766          * Get short description URL for a file based on the page ID.
 767          *
 768          * @return string|null
 769          * @throws MWException
 770          * @since 1.27
 771          */
 772         public function getDescriptionShortUrl() {
 773                 $pageId = $this->title->getArticleID();
 774
 775                 if ( $pageId !== null ) {
 776                         $url = $this->repo->makeUrl( [ 'curid' => $pageId ] );
 777                         if ( $url !== false ) {
 778                                 return $url;
 779                         }
 780                 }
 781                 return null;
 782         }
 783
 784         /**
 785          * Get handler-specific metadata
 786          * @return string
 787          */
 788         function getMetadata() {
 789                 $this->load( self::LOAD_ALL ); // large metadata is loaded in another step
 790                 return $this->metadata;
 791         }
 792
 793         /**
 794          * @return int
 795          */
 796         function getBitDepth() {
 797                 $this->load();
 798
 799                 return (int)$this->bits;
 800         }
 801
 802         /**
 803          * Returns the size of the image file, in bytes
 804          * @return int
 805          */
 806         public function getSize() {
 807                 $this->load();
 808
 809                 return $this->size;
 810         }
 811
 812         /**
 813          * Returns the MIME type of the file.
 814          * @return string
 815          */
 816         function getMimeType() {
 817                 $this->load();
 818
 819                 return $this->mime;
 820         }
 821
 822         /**
 823          * Returns the type of the media in the file.
 824          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 825          * @return string
 826          */
 827         function getMediaType() {
 828                 $this->load();
 829
 830                 return $this->media_type;
 831         }
 832
 833         /** canRender inherited */
 834         /** mustRender inherited */
 835         /** allowInlineDisplay inherited */
 836         /** isSafeFile inherited */
 837         /** isTrustedFile inherited */
 838
 839         /**
 840          * Returns true if the file exists on disk.
 841          * @return bool Whether file exist on disk.
 842          */
 843         public function exists() {
 844                 $this->load();
 845
 846                 return $this->fileExists;
 847         }
 848
 849         /** getTransformScript inherited */
 850         /** getUnscaledThumb inherited */
 851         /** thumbName inherited */
 852         /** createThumb inherited */
 853         /** transform inherited */
 854
 855         /** getHandler inherited */
 856         /** iconThumb inherited */
 857         /** getLastError inherited */
 858
 859         /**
 860          * Get all thumbnail names previously generated for this file
 861          * @param string|bool $archiveName Name of an archive file, default false
 862          * @return array First element is the base dir, then files in that base dir.
 863          */
 864         function getThumbnails( $archiveName = false ) {
 865                 if ( $archiveName ) {
 866                         $dir = $this->getArchiveThumbPath( $archiveName );
 867                 } else {
 868                         $dir = $this->getThumbPath();
 869                 }
 870
 871                 $backend = $this->repo->getBackend();
 872                 $files = [ $dir ];
 873                 try {
 874                         $iterator = $backend->getFileList( [ 'dir' => $dir ] );
 875                         foreach ( $iterator as $file ) {
 876                                 $files[] = $file;
 877                         }
 878                 } catch ( FileBackendError $e ) {
 879                 } // suppress (bug 54674)
 880
 881                 return $files;
 882         }
 883
 884         /**
 885          * Refresh metadata in memcached, but don't touch thumbnails or CDN
 886          */
 887         function purgeMetadataCache() {
 888                 $this->invalidateCache();
 889         }
 890
 891         /**
 892          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the CDN.
 893          *
 894          * @param array $options An array potentially with the key forThumbRefresh.
 895          *
 896          * @note This used to purge old thumbnails by default as well, but doesn't anymore.
 897          */
 898         function purgeCache( $options = [] ) {
 899                 // Refresh metadata cache
 900                 $this->purgeMetadataCache();
 901
 902                 // Delete thumbnails
 903                 $this->purgeThumbnails( $options );
 904
 905                 // Purge CDN cache for this file
 906                 DeferredUpdates::addUpdate(
 907                         new CdnCacheUpdate( [ $this->getUrl() ] ),
 908                         DeferredUpdates::PRESEND
 909                 );
 910         }
 911
 912         /**
 913          * Delete cached transformed files for an archived version only.
 914          * @param string $archiveName Name of the archived file
 915          */
 916         function purgeOldThumbnails( $archiveName ) {
 917                 // Get a list of old thumbnails and URLs
 918                 $files = $this->getThumbnails( $archiveName );
 919
 920                 // Purge any custom thumbnail caches
 921                 Hooks::run( 'LocalFilePurgeThumbnails', [ $this, $archiveName ] );
 922
 923                 // Delete thumbnails
 924                 $dir = array_shift( $files );
 925                 $this->purgeThumbList( $dir, $files );
 926
 927                 // Purge the CDN
 928                 $urls = [];
 929                 foreach ( $files as $file ) {
 930                         $urls[] = $this->getArchiveThumbUrl( $archiveName, $file );
 931                 }
 932                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $urls ), DeferredUpdates::PRESEND );
 933         }
 934
 935         /**
 936          * Delete cached transformed files for the current version only.
 937          * @param array $options
 938          */
 939         public function purgeThumbnails( $options = [] ) {
 940                 $files = $this->getThumbnails();
 941                 // Always purge all files from CDN regardless of handler filters
 942                 $urls = [];
 943                 foreach ( $files as $file ) {
 944                         $urls[] = $this->getThumbUrl( $file );
 945                 }
 946                 array_shift( $urls ); // don't purge directory
 947
 948                 // Give media handler a chance to filter the file purge list
 949                 if ( !empty( $options['forThumbRefresh'] ) ) {
 950                         $handler = $this->getHandler();
 951                         if ( $handler ) {
 952                                 $handler->filterThumbnailPurgeList( $files, $options );
 953                         }
 954                 }
 955
 956                 // Purge any custom thumbnail caches
 957                 Hooks::run( 'LocalFilePurgeThumbnails', [ $this, false ] );
 958
 959                 // Delete thumbnails
 960                 $dir = array_shift( $files );
 961                 $this->purgeThumbList( $dir, $files );
 962
 963                 // Purge the CDN
 964                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $urls ), DeferredUpdates::PRESEND );
 965         }
 966
 967         /**
 968          * Delete a list of thumbnails visible at urls
 969          * @param string $dir Base dir of the files.
 970          * @param array $files Array of strings: relative filenames (to $dir)
 971          */
 972         protected function purgeThumbList( $dir, $files ) {
 973                 $fileListDebug = strtr(
 974                         var_export( $files, true ),
 975                         [ "\n" => '' ]
 976                 );
 977                 wfDebug( __METHOD__ . ": $fileListDebug\n" );
 978
 979                 $purgeList = [];
 980                 foreach ( $files as $file ) {
 981                         # Check that the base file name is part of the thumb name
 982                         # This is a basic sanity check to avoid erasing unrelated directories
 983                         if ( strpos( $file, $this->getName() ) !== false
 984                                 || strpos( $file, "-thumbnail" ) !== false // "short" thumb name
 985                         ) {
 986                                 $purgeList[] = "{$dir}/{$file}";
 987                         }
 988                 }
 989
 990                 # Delete the thumbnails
 991                 $this->repo->quickPurgeBatch( $purgeList );
 992                 # Clear out the thumbnail directory if empty
 993                 $this->repo->quickCleanDir( $dir );
 994         }
 995
 996         /** purgeDescription inherited */
 997         /** purgeEverything inherited */
 998
 999         /**
1000          * @param int $limit Optional: Limit to number of results
1001          * @param int $start Optional: Timestamp, start from
1002          * @param int $end Optional: Timestamp, end at
1003          * @param bool $inc
1004          * @return OldLocalFile[]
1005          */
1006         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
1007                 $dbr = $this->repo->getSlaveDB();
1008                 $tables = [ 'oldimage' ];
1009                 $fields = OldLocalFile::selectFields();
1010                 $conds = $opts = $join_conds = [];
1011                 $eq = $inc ? '=' : '';
1012                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
1013
1014                 if ( $start ) {
1015                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
1016                 }
1017
1018                 if ( $end ) {
1019                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
1020                 }
1021
1022                 if ( $limit ) {
1023                         $opts['LIMIT'] = $limit;
1024                 }
1025
1026                 // Search backwards for time > x queries
1027                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
1028                 $opts['ORDER BY'] = "oi_timestamp $order";
1029                 $opts['USE INDEX'] = [ 'oldimage' => 'oi_name_timestamp' ];
1030
1031                 Hooks::run( 'LocalFile::getHistory', [ &$this, &$tables, &$fields,
1032                         &$conds, &$opts, &$join_conds ] );
1033
1034                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
1035                 $r = [];
1036
1037                 foreach ( $res as $row ) {
1038                         $r[] = $this->repo->newFileFromRow( $row );
1039                 }
1040
1041                 if ( $order == 'ASC' ) {
1042                         $r = array_reverse( $r ); // make sure it ends up descending
1043                 }
1044
1045                 return $r;
1046         }
1047
1048         /**
1049          * Returns the history of this file, line by line.
1050          * starts with current version, then old versions.
1051          * uses $this->historyLine to check which line to return:
1052          *  0      return line for current version
1053          *  1      query for old versions, return first one
1054          *  2, ... return next old version from above query
1055          * @return bool
1056          */
1057         public function nextHistoryLine() {
1058                 # Polymorphic function name to distinguish foreign and local fetches
1059                 $fname = get_class( $this ) . '::' . __FUNCTION__;
1060
1061                 $dbr = $this->repo->getSlaveDB();
1062
1063                 if ( $this->historyLine == 0 ) { // called for the first time, return line from cur
1064                         $this->historyRes = $dbr->select( 'image',
1065                                 [
1066                                         '*',
1067                                         "'' AS oi_archive_name",
1068                                         '0 as oi_deleted',
1069                                         'img_sha1'
1070                                 ],
1071                                 [ 'img_name' => $this->title->getDBkey() ],
1072                                 $fname
1073                         );
1074
1075                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
1076                                 $this->historyRes = null;
1077
1078                                 return false;
1079                         }
1080                 } elseif ( $this->historyLine == 1 ) {
1081                         $this->historyRes = $dbr->select( 'oldimage', '*',
1082                                 [ 'oi_name' => $this->title->getDBkey() ],
1083                                 $fname,
1084                                 [ 'ORDER BY' => 'oi_timestamp DESC' ]
1085                         );
1086                 }
1087                 $this->historyLine++;
1088
1089                 return $dbr->fetchObject( $this->historyRes );
1090         }
1091
1092         /**
1093          * Reset the history pointer to the first element of the history
1094          */
1095         public function resetHistory() {
1096                 $this->historyLine = 0;
1097
1098                 if ( !is_null( $this->historyRes ) ) {
1099                         $this->historyRes = null;
1100                 }
1101         }
1102
1103         /** getHashPath inherited */
1104         /** getRel inherited */
1105         /** getUrlRel inherited */
1106         /** getArchiveRel inherited */
1107         /** getArchivePath inherited */
1108         /** getThumbPath inherited */
1109         /** getArchiveUrl inherited */
1110         /** getThumbUrl inherited */
1111         /** getArchiveVirtualUrl inherited */
1112         /** getThumbVirtualUrl inherited */
1113         /** isHashed inherited */
1114
1115         /**
1116          * Upload a file and record it in the DB
1117          * @param string|FSFile $src Source storage path, virtual URL, or filesystem path
1118          * @param string $comment Upload description
1119          * @param string $pageText Text to use for the new description page,
1120          *   if a new description page is created
1121          * @param int|bool $flags Flags for publish()
1122          * @param array|bool $props File properties, if known. This can be used to
1123          *   reduce the upload time when uploading virtual URLs for which the file
1124          *   info is already known
1125          * @param string|bool $timestamp Timestamp for img_timestamp, or false to use the
1126          *   current time
1127          * @param User|null $user User object or null to use $wgUser
1128          * @param string[] $tags Change tags to add to the log entry and page revision.
1129          *   (This doesn't check $user's permissions.)
1130          * @return FileRepoStatus On success, the value member contains the
1131          *     archive name, or an empty string if it was a new file.
1132          */
1133         function upload( $src, $comment, $pageText, $flags = 0, $props = false,
1134                 $timestamp = false, $user = null, $tags = []
1135         ) {
1136                 global $wgContLang;
1137
1138                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1139                         return $this->readOnlyFatalStatus();
1140                 }
1141
1142                 $srcPath = ( $src instanceof FSFile ) ? $src->getPath() : $src;
1143                 if ( !$props ) {
1144                         if ( $this->repo->isVirtualUrl( $srcPath )
1145                                 || FileBackend::isStoragePath( $srcPath )
1146                         ) {
1147                                 $props = $this->repo->getFileProps( $srcPath );
1148                         } else {
1149                                 $props = FSFile::getPropsFromPath( $srcPath );
1150                         }
1151                 }
1152
1153                 $options = [];
1154                 $handler = MediaHandler::getHandler( $props['mime'] );
1155                 if ( $handler ) {
1156                         $options['headers'] = $handler->getStreamHeaders( $props['metadata'] );
1157                 } else {
1158                         $options['headers'] = [];
1159                 }
1160
1161                 // Trim spaces on user supplied text
1162                 $comment = trim( $comment );
1163
1164                 // Truncate nicely or the DB will do it for us
1165                 // non-nicely (dangling multi-byte chars, non-truncated version in cache).
1166                 $comment = $wgContLang->truncate( $comment, 255 );
1167                 $this->lock(); // begin
1168                 $status = $this->publish( $src, $flags, $options );
1169
1170                 if ( $status->successCount >= 2 ) {
1171                         // There will be a copy+(one of move,copy,store).
1172                         // The first succeeding does not commit us to updating the DB
1173                         // since it simply copied the current version to a timestamped file name.
1174                         // It is only *preferable* to avoid leaving such files orphaned.
1175                         // Once the second operation goes through, then the current version was
1176                         // updated and we must therefore update the DB too.
1177                         $oldver = $status->value;
1178                         if ( !$this->recordUpload2( $oldver, $comment, $pageText, $props, $timestamp, $user, $tags ) ) {
1179                                 $status->fatal( 'filenotfound', $srcPath );
1180                         }
1181                 }
1182
1183                 $this->unlock(); // done
1184
1185                 return $status;
1186         }
1187
1188         /**
1189          * Record a file upload in the upload log and the image table
1190          * @param string $oldver
1191          * @param string $desc
1192          * @param string $license
1193          * @param string $copyStatus
1194          * @param string $source
1195          * @param bool $watch
1196          * @param string|bool $timestamp
1197          * @param User|null $user User object or null to use $wgUser
1198          * @return bool
1199          */
1200         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
1201                 $watch = false, $timestamp = false, User $user = null ) {
1202                 if ( !$user ) {
1203                         global $wgUser;
1204                         $user = $wgUser;
1205                 }
1206
1207                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
1208
1209                 if ( !$this->recordUpload2( $oldver, $desc, $pageText, false, $timestamp, $user ) ) {
1210                         return false;
1211                 }
1212
1213                 if ( $watch ) {
1214                         $user->addWatch( $this->getTitle() );
1215                 }
1216
1217                 return true;
1218         }
1219
1220         /**
1221          * Record a file upload in the upload log and the image table
1222          * @param string $oldver
1223          * @param string $comment
1224          * @param string $pageText
1225          * @param bool|array $props
1226          * @param string|bool $timestamp
1227          * @param null|User $user
1228          * @param string[] $tags
1229          * @return bool
1230          */
1231         function recordUpload2(
1232                 $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null, $tags = []
1233         ) {
1234                 if ( is_null( $user ) ) {
1235                         global $wgUser;
1236                         $user = $wgUser;
1237                 }
1238
1239                 $dbw = $this->repo->getMasterDB();
1240
1241                 # Imports or such might force a certain timestamp; otherwise we generate
1242                 # it and can fudge it slightly to keep (name,timestamp) unique on re-upload.
1243                 if ( $timestamp === false ) {
1244                         $timestamp = $dbw->timestamp();
1245                         $allowTimeKludge = true;
1246                 } else {
1247                         $allowTimeKludge = false;
1248                 }
1249
1250                 $props = $props ?: $this->repo->getFileProps( $this->getVirtualUrl() );
1251                 $props['description'] = $comment;
1252                 $props['user'] = $user->getId();
1253                 $props['user_text'] = $user->getName();
1254                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1255                 $this->setProps( $props );
1256
1257                 # Fail now if the file isn't there
1258                 if ( !$this->fileExists ) {
1259                         wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
1260
1261                         return false;
1262                 }
1263
1264                 $dbw->startAtomic( __METHOD__ );
1265
1266                 # Test to see if the row exists using INSERT IGNORE
1267                 # This avoids race conditions by locking the row until the commit, and also
1268                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
1269                 $dbw->insert( 'image',
1270                         [
1271                                 'img_name' => $this->getName(),
1272                                 'img_size' => $this->size,
1273                                 'img_width' => intval( $this->width ),
1274                                 'img_height' => intval( $this->height ),
1275                                 'img_bits' => $this->bits,
1276                                 'img_media_type' => $this->media_type,
1277                                 'img_major_mime' => $this->major_mime,
1278                                 'img_minor_mime' => $this->minor_mime,
1279                                 'img_timestamp' => $timestamp,
1280                                 'img_description' => $comment,
1281                                 'img_user' => $user->getId(),
1282                                 'img_user_text' => $user->getName(),
1283                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1284                                 'img_sha1' => $this->sha1
1285                         ],
1286                         __METHOD__,
1287                         'IGNORE'
1288                 );
1289
1290                 $reupload = ( $dbw->affectedRows() == 0 );
1291                 if ( $reupload ) {
1292                         if ( $allowTimeKludge ) {
1293                                 # Use LOCK IN SHARE MODE to ignore any transaction snapshotting
1294                                 $ltimestamp = $dbw->selectField(
1295                                         'image',
1296                                         'img_timestamp',
1297                                         [ 'img_name' => $this->getName() ],
1298                                         __METHOD__,
1299                                         [ 'LOCK IN SHARE MODE' ]
1300                                 );
1301                                 $lUnixtime = $ltimestamp ? wfTimestamp( TS_UNIX, $ltimestamp ) : false;
1302                                 # Avoid a timestamp that is not newer than the last version
1303                                 # TODO: the image/oldimage tables should be like page/revision with an ID field
1304                                 if ( $lUnixtime && wfTimestamp( TS_UNIX, $timestamp ) <= $lUnixtime ) {
1305                                         sleep( 1 ); // fast enough re-uploads would go far in the future otherwise
1306                                         $timestamp = $dbw->timestamp( $lUnixtime + 1 );
1307                                         $this->timestamp = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1308                                 }
1309                         }
1310
1311                         # (bug 34993) Note: $oldver can be empty here, if the previous
1312                         # version of the file was broken. Allow registration of the new
1313                         # version to continue anyway, because that's better than having
1314                         # an image that's not fixable by user operations.
1315                         # Collision, this is an update of a file
1316                         # Insert previous contents into oldimage
1317                         $dbw->insertSelect( 'oldimage', 'image',
1318                                 [
1319                                         'oi_name' => 'img_name',
1320                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1321                                         'oi_size' => 'img_size',
1322                                         'oi_width' => 'img_width',
1323                                         'oi_height' => 'img_height',
1324                                         'oi_bits' => 'img_bits',
1325                                         'oi_timestamp' => 'img_timestamp',
1326                                         'oi_description' => 'img_description',
1327                                         'oi_user' => 'img_user',
1328                                         'oi_user_text' => 'img_user_text',
1329                                         'oi_metadata' => 'img_metadata',
1330                                         'oi_media_type' => 'img_media_type',
1331                                         'oi_major_mime' => 'img_major_mime',
1332                                         'oi_minor_mime' => 'img_minor_mime',
1333                                         'oi_sha1' => 'img_sha1'
1334                                 ],
1335                                 [ 'img_name' => $this->getName() ],
1336                                 __METHOD__
1337                         );
1338
1339                         # Update the current image row
1340                         $dbw->update( 'image',
1341                                 [
1342                                         'img_size' => $this->size,
1343                                         'img_width' => intval( $this->width ),
1344                                         'img_height' => intval( $this->height ),
1345                                         'img_bits' => $this->bits,
1346                                         'img_media_type' => $this->media_type,
1347                                         'img_major_mime' => $this->major_mime,
1348                                         'img_minor_mime' => $this->minor_mime,
1349                                         'img_timestamp' => $timestamp,
1350                                         'img_description' => $comment,
1351                                         'img_user' => $user->getId(),
1352                                         'img_user_text' => $user->getName(),
1353                                         'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1354                                         'img_sha1' => $this->sha1
1355                                 ],
1356                                 [ 'img_name' => $this->getName() ],
1357                                 __METHOD__
1358                         );
1359                 }
1360
1361                 $descTitle = $this->getTitle();
1362                 $descId = $descTitle->getArticleID();
1363                 $wikiPage = new WikiFilePage( $descTitle );
1364                 $wikiPage->setFile( $this );
1365
1366                 // Add the log entry...
1367                 $logEntry = new ManualLogEntry( 'upload', $reupload ? 'overwrite' : 'upload' );
1368                 $logEntry->setTimestamp( $this->timestamp );
1369                 $logEntry->setPerformer( $user );
1370                 $logEntry->setComment( $comment );
1371                 $logEntry->setTarget( $descTitle );
1372                 // Allow people using the api to associate log entries with the upload.
1373                 // Log has a timestamp, but sometimes different from upload timestamp.
1374                 $logEntry->setParameters(
1375                         [
1376                                 'img_sha1' => $this->sha1,
1377                                 'img_timestamp' => $timestamp,
1378                         ]
1379                 );
1380                 // Note we keep $logId around since during new image
1381                 // creation, page doesn't exist yet, so log_page = 0
1382                 // but we want it to point to the page we're making,
1383                 // so we later modify the log entry.
1384                 // For a similar reason, we avoid making an RC entry
1385                 // now and wait until the page exists.
1386                 $logId = $logEntry->insert();
1387
1388                 if ( $descTitle->exists() ) {
1389                         // Use own context to get the action text in content language
1390                         $formatter = LogFormatter::newFromEntry( $logEntry );
1391                         $formatter->setContext( RequestContext::newExtraneousContext( $descTitle ) );
1392                         $editSummary = $formatter->getPlainActionText();
1393
1394                         $nullRevision = Revision::newNullRevision(
1395                                 $dbw,
1396                                 $descId,
1397                                 $editSummary,
1398                                 false,
1399                                 $user
1400                         );
1401                         if ( $nullRevision ) {
1402                                 $nullRevision->insertOn( $dbw );
1403                                 Hooks::run(
1404                                         'NewRevisionFromEditComplete',
1405                                         [ $wikiPage, $nullRevision, $nullRevision->getParentId(), $user ]
1406                                 );
1407                                 $wikiPage->updateRevisionOn( $dbw, $nullRevision );
1408                                 // Associate null revision id
1409                                 $logEntry->setAssociatedRevId( $nullRevision->getId() );
1410                         }
1411
1412                         $newPageContent = null;
1413                 } else {
1414                         // Make the description page and RC log entry post-commit
1415                         $newPageContent = ContentHandler::makeContent( $pageText, $descTitle );
1416                 }
1417
1418                 # Defer purges, page creation, and link updates in case they error out.
1419                 # The most important thing is that files and the DB registry stay synced.
1420                 $dbw->endAtomic( __METHOD__ );
1421
1422                 # Do some cache purges after final commit so that:
1423                 # a) Changes are more likely to be seen post-purge
1424                 # b) They won't cause rollback of the log publish/update above
1425                 $that = $this;
1426                 $dbw->onTransactionIdle( function () use (
1427                         $that, $reupload, $wikiPage, $newPageContent, $comment, $user, $logEntry, $logId, $descId, $tags
1428                 ) {
1429                         # Update memcache after the commit
1430                         $that->invalidateCache();
1431
1432                         $updateLogPage = false;
1433                         if ( $newPageContent ) {
1434                                 # New file page; create the description page.
1435                                 # There's already a log entry, so don't make a second RC entry
1436                                 # CDN and file cache for the description page are purged by doEditContent.
1437                                 $status = $wikiPage->doEditContent(
1438                                         $newPageContent,
1439                                         $comment,
1440                                         EDIT_NEW | EDIT_SUPPRESS_RC,
1441                                         false,
1442                                         $user
1443                                 );
1444
1445                                 if ( isset( $status->value['revision'] ) ) {
1446                                         // Associate new page revision id
1447                                         $logEntry->setAssociatedRevId( $status->value['revision']->getId() );
1448                                 }
1449                                 // This relies on the resetArticleID() call in WikiPage::insertOn(),
1450                                 // which is triggered on $descTitle by doEditContent() above.
1451                                 if ( isset( $status->value['revision'] ) ) {
1452                                         /** @var $rev Revision */
1453                                         $rev = $status->value['revision'];
1454                                         $updateLogPage = $rev->getPage();
1455                                 }
1456                         } else {
1457                                 # Existing file page: invalidate description page cache
1458                                 $wikiPage->getTitle()->invalidateCache();
1459                                 $wikiPage->getTitle()->purgeSquid();
1460                                 # Allow the new file version to be patrolled from the page footer
1461                                 Article::purgePatrolFooterCache( $descId );
1462                         }
1463
1464                         # Update associated rev id. This should be done by $logEntry->insert() earlier,
1465                         # but setAssociatedRevId() wasn't called at that point yet...
1466                         $logParams = $logEntry->getParameters();
1467                         $logParams['associated_rev_id'] = $logEntry->getAssociatedRevId();
1468                         $update = [ 'log_params' => LogEntryBase::makeParamBlob( $logParams ) ];
1469                         if ( $updateLogPage ) {
1470                                 # Also log page, in case where we just created it above
1471                                 $update['log_page'] = $updateLogPage;
1472                         }
1473                         $that->getRepo()->getMasterDB()->update(
1474                                 'logging',
1475                                 $update,
1476                                 [ 'log_id' => $logId ],
1477                                 __METHOD__
1478                         );
1479                         $that->getRepo()->getMasterDB()->insert(
1480                                 'log_search',
1481                                 [
1482                                         'ls_field' => 'associated_rev_id',
1483                                         'ls_value' => $logEntry->getAssociatedRevId(),
1484                                         'ls_log_id' => $logId,
1485                                 ],
1486                                 __METHOD__
1487                         );
1488
1489                         # Add change tags, if any
1490                         if ( $tags ) {
1491                                 $logEntry->setTags( $tags );
1492                         }
1493
1494                         # Uploads can be patrolled
1495                         $logEntry->setIsPatrollable( true );
1496
1497                         # Now that the log entry is up-to-date, make an RC entry.
1498                         $logEntry->publish( $logId );
1499
1500                         # Run hook for other updates (typically more cache purging)
1501                         Hooks::run( 'FileUpload', [ $that, $reupload, !$newPageContent ] );
1502
1503                         if ( $reupload ) {
1504                                 # Delete old thumbnails
1505                                 $that->purgeThumbnails();
1506                                 # Remove the old file from the CDN cache
1507                                 DeferredUpdates::addUpdate(
1508                                         new CdnCacheUpdate( [ $that->getUrl() ] ),
1509                                         DeferredUpdates::PRESEND
1510                                 );
1511                         } else {
1512                                 # Update backlink pages pointing to this title if created
1513                                 LinksUpdate::queueRecursiveJobsForTable( $that->getTitle(), 'imagelinks' );
1514                         }
1515                 } );
1516
1517                 if ( !$reupload ) {
1518                         # This is a new file, so update the image count
1519                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => 1 ] ) );
1520                 }
1521
1522                 # Invalidate cache for all pages using this file
1523                 DeferredUpdates::addUpdate( new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' ) );
1524
1525                 return true;
1526         }
1527
1528         /**
1529          * Move or copy a file to its public location. If a file exists at the
1530          * destination, move it to an archive. Returns a FileRepoStatus object with
1531          * the archive name in the "value" member on success.
1532          *
1533          * The archive name should be passed through to recordUpload for database
1534          * registration.
1535          *
1536          * @param string|FSFile $src Local filesystem path or virtual URL to the source image
1537          * @param int $flags A bitwise combination of:
1538          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1539          * @param array $options Optional additional parameters
1540          * @return FileRepoStatus On success, the value member contains the
1541          *     archive name, or an empty string if it was a new file.
1542          */
1543         function publish( $src, $flags = 0, array $options = [] ) {
1544                 return $this->publishTo( $src, $this->getRel(), $flags, $options );
1545         }
1546
1547         /**
1548          * Move or copy a file to a specified location. Returns a FileRepoStatus
1549          * object with the archive name in the "value" member on success.
1550          *
1551          * The archive name should be passed through to recordUpload for database
1552          * registration.
1553          *
1554          * @param string|FSFile $src Local filesystem path or virtual URL to the source image
1555          * @param string $dstRel Target relative path
1556          * @param int $flags A bitwise combination of:
1557          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1558          * @param array $options Optional additional parameters
1559          * @return FileRepoStatus On success, the value member contains the
1560          *     archive name, or an empty string if it was a new file.
1561          */
1562         function publishTo( $src, $dstRel, $flags = 0, array $options = [] ) {
1563                 $srcPath = ( $src instanceof FSFile ) ? $src->getPath() : $src;
1564
1565                 $repo = $this->getRepo();
1566                 if ( $repo->getReadOnlyReason() !== false ) {
1567                         return $this->readOnlyFatalStatus();
1568                 }
1569
1570                 $this->lock(); // begin
1571
1572                 $archiveName = wfTimestamp( TS_MW ) . '!' . $this->getName();
1573                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1574
1575                 if ( $repo->hasSha1Storage() ) {
1576                         $sha1 = $repo->isVirtualUrl( $srcPath )
1577                                 ? $repo->getFileSha1( $srcPath )
1578                                 : FSFile::getSha1Base36FromPath( $srcPath );
1579                         $dst = $repo->getBackend()->getPathForSHA1( $sha1 );
1580                         $status = $repo->quickImport( $src, $dst );
1581                         if ( $flags & File::DELETE_SOURCE ) {
1582                                 unlink( $srcPath );
1583                         }
1584
1585                         if ( $this->exists() ) {
1586                                 $status->value = $archiveName;
1587                         }
1588                 } else {
1589                         $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1590                         $status = $repo->publish( $srcPath, $dstRel, $archiveRel, $flags, $options );
1591
1592                         if ( $status->value == 'new' ) {
1593                                 $status->value = '';
1594                         } else {
1595                                 $status->value = $archiveName;
1596                         }
1597                 }
1598
1599                 $this->unlock(); // done
1600
1601                 return $status;
1602         }
1603
1604         /** getLinksTo inherited */
1605         /** getExifData inherited */
1606         /** isLocal inherited */
1607         /** wasDeleted inherited */
1608
1609         /**
1610          * Move file to the new title
1611          *
1612          * Move current, old version and all thumbnails
1613          * to the new filename. Old file is deleted.
1614          *
1615          * Cache purging is done; checks for validity
1616          * and logging are caller's responsibility
1617          *
1618          * @param Title $target New file name
1619          * @return FileRepoStatus
1620          */
1621         function move( $target ) {
1622                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1623                         return $this->readOnlyFatalStatus();
1624                 }
1625
1626                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1627                 $batch = new LocalFileMoveBatch( $this, $target );
1628
1629                 $this->lock(); // begin
1630                 $batch->addCurrent();
1631                 $archiveNames = $batch->addOlds();
1632                 $status = $batch->execute();
1633                 $this->unlock(); // done
1634
1635                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1636
1637                 // Purge the source and target files...
1638                 $oldTitleFile = wfLocalFile( $this->title );
1639                 $newTitleFile = wfLocalFile( $target );
1640                 // To avoid slow purges in the transaction, move them outside...
1641                 DeferredUpdates::addUpdate(
1642                         new AutoCommitUpdate(
1643                                 $this->getRepo()->getMasterDB(),
1644                                 __METHOD__,
1645                                 function () use ( $oldTitleFile, $newTitleFile, $archiveNames ) {
1646                                         $oldTitleFile->purgeEverything();
1647                                         foreach ( $archiveNames as $archiveName ) {
1648                                                 $oldTitleFile->purgeOldThumbnails( $archiveName );
1649                                         }
1650                                         $newTitleFile->purgeEverything();
1651                                 }
1652                         ),
1653                         DeferredUpdates::PRESEND
1654                 );
1655
1656                 if ( $status->isOK() ) {
1657                         // Now switch the object
1658                         $this->title = $target;
1659                         // Force regeneration of the name and hashpath
1660                         unset( $this->name );
1661                         unset( $this->hashPath );
1662                 }
1663
1664                 return $status;
1665         }
1666
1667         /**
1668          * Delete all versions of the file.
1669          *
1670          * Moves the files into an archive directory (or deletes them)
1671          * and removes the database rows.
1672          *
1673          * Cache purging is done; logging is caller's responsibility.
1674          *
1675          * @param string $reason
1676          * @param bool $suppress
1677          * @param User|null $user
1678          * @return FileRepoStatus
1679          */
1680         function delete( $reason, $suppress = false, $user = null ) {
1681                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1682                         return $this->readOnlyFatalStatus();
1683                 }
1684
1685                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress, $user );
1686
1687                 $this->lock(); // begin
1688                 $batch->addCurrent();
1689                 // Get old version relative paths
1690                 $archiveNames = $batch->addOlds();
1691                 $status = $batch->execute();
1692                 $this->unlock(); // done
1693
1694                 if ( $status->isOK() ) {
1695                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => -1 ] ) );
1696                 }
1697
1698                 // To avoid slow purges in the transaction, move them outside...
1699                 DeferredUpdates::addUpdate(
1700                         new AutoCommitUpdate(
1701                                 $this->getRepo()->getMasterDB(),
1702                                 __METHOD__,
1703                                 function () use ( $archiveNames ) {
1704                                         $this->purgeEverything();
1705                                         foreach ( $archiveNames as $archiveName ) {
1706                                                 $this->purgeOldThumbnails( $archiveName );
1707                                         }
1708                                 }
1709                         ),
1710                         DeferredUpdates::PRESEND
1711                 );
1712
1713                 // Purge the CDN
1714                 $purgeUrls = [];
1715                 foreach ( $archiveNames as $archiveName ) {
1716                         $purgeUrls[] = $this->getArchiveUrl( $archiveName );
1717                 }
1718                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $purgeUrls ), DeferredUpdates::PRESEND );
1719
1720                 return $status;
1721         }
1722
1723         /**
1724          * Delete an old version of the file.
1725          *
1726          * Moves the file into an archive directory (or deletes it)
1727          * and removes the database row.
1728          *
1729          * Cache purging is done; logging is caller's responsibility.
1730          *
1731          * @param string $archiveName
1732          * @param string $reason
1733          * @param bool $suppress
1734          * @param User|null $user
1735          * @throws MWException Exception on database or file store failure
1736          * @return FileRepoStatus
1737          */
1738         function deleteOld( $archiveName, $reason, $suppress = false, $user = null ) {
1739                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1740                         return $this->readOnlyFatalStatus();
1741                 }
1742
1743                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress, $user );
1744
1745                 $this->lock(); // begin
1746                 $batch->addOld( $archiveName );
1747                 $status = $batch->execute();
1748                 $this->unlock(); // done
1749
1750                 $this->purgeOldThumbnails( $archiveName );
1751                 if ( $status->isOK() ) {
1752                         $this->purgeDescription();
1753                 }
1754
1755                 DeferredUpdates::addUpdate(
1756                         new CdnCacheUpdate( [ $this->getArchiveUrl( $archiveName ) ] ),
1757                         DeferredUpdates::PRESEND
1758                 );
1759
1760                 return $status;
1761         }
1762
1763         /**
1764          * Restore all or specified deleted revisions to the given file.
1765          * Permissions and logging are left to the caller.
1766          *
1767          * May throw database exceptions on error.
1768          *
1769          * @param array $versions Set of record ids of deleted items to restore,
1770          *   or empty to restore all revisions.
1771          * @param bool $unsuppress
1772          * @return FileRepoStatus
1773          */
1774         function restore( $versions = [], $unsuppress = false ) {
1775                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1776                         return $this->readOnlyFatalStatus();
1777                 }
1778
1779                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1780
1781                 $this->lock(); // begin
1782                 if ( !$versions ) {
1783                         $batch->addAll();
1784                 } else {
1785                         $batch->addIds( $versions );
1786                 }
1787                 $status = $batch->execute();
1788                 if ( $status->isGood() ) {
1789                         $cleanupStatus = $batch->cleanup();
1790                         $cleanupStatus->successCount = 0;
1791                         $cleanupStatus->failCount = 0;
1792                         $status->merge( $cleanupStatus );
1793                 }
1794                 $this->unlock(); // done
1795
1796                 return $status;
1797         }
1798
1799         /** isMultipage inherited */
1800         /** pageCount inherited */
1801         /** scaleHeight inherited */
1802         /** getImageSize inherited */
1803
1804         /**
1805          * Get the URL of the file description page.
1806          * @return string
1807          */
1808         function getDescriptionUrl() {
1809                 return $this->title->getLocalURL();
1810         }
1811
1812         /**
1813          * Get the HTML text of the description page
1814          * This is not used by ImagePage for local files, since (among other things)
1815          * it skips the parser cache.
1816          *
1817          * @param Language $lang What language to get description in (Optional)
1818          * @return bool|mixed
1819          */
1820         function getDescriptionText( $lang = null ) {
1821                 $revision = Revision::newFromTitle( $this->title, false, Revision::READ_NORMAL );
1822                 if ( !$revision ) {
1823                         return false;
1824                 }
1825                 $content = $revision->getContent();
1826                 if ( !$content ) {
1827                         return false;
1828                 }
1829                 $pout = $content->getParserOutput( $this->title, null, new ParserOptions( null, $lang ) );
1830
1831                 return $pout->getText();
1832         }
1833
1834         /**
1835          * @param int $audience
1836          * @param User $user
1837          * @return string
1838          */
1839         function getDescription( $audience = self::FOR_PUBLIC, User $user = null ) {
1840                 $this->load();
1841                 if ( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
1842                         return '';
1843                 } elseif ( $audience == self::FOR_THIS_USER
1844                         && !$this->userCan( self::DELETED_COMMENT, $user )
1845                 ) {
1846                         return '';
1847                 } else {
1848                         return $this->description;
1849                 }
1850         }
1851
1852         /**
1853          * @return bool|string
1854          */
1855         function getTimestamp() {
1856                 $this->load();
1857
1858                 return $this->timestamp;
1859         }
1860
1861         /**
1862          * @return bool|string
1863          */
1864         public function getDescriptionTouched() {
1865                 // The DB lookup might return false, e.g. if the file was just deleted, or the shared DB repo
1866                 // itself gets it from elsewhere. To avoid repeating the DB lookups in such a case, we
1867                 // need to differentiate between null (uninitialized) and false (failed to load).
1868                 if ( $this->descriptionTouched === null ) {
1869                         $cond = [
1870                                 'page_namespace' => $this->title->getNamespace(),
1871                                 'page_title' => $this->title->getDBkey()
1872                         ];
1873                         $touched = $this->repo->getSlaveDB()->selectField( 'page', 'page_touched', $cond, __METHOD__ );
1874                         $this->descriptionTouched = $touched ? wfTimestamp( TS_MW, $touched ) : false;
1875                 }
1876
1877                 return $this->descriptionTouched;
1878         }
1879
1880         /**
1881          * @return string
1882          */
1883         function getSha1() {
1884                 $this->load();
1885                 // Initialise now if necessary
1886                 if ( $this->sha1 == '' && $this->fileExists ) {
1887                         $this->lock(); // begin
1888
1889                         $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
1890                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1891                                 $dbw = $this->repo->getMasterDB();
1892                                 $dbw->update( 'image',
1893                                         [ 'img_sha1' => $this->sha1 ],
1894                                         [ 'img_name' => $this->getName() ],
1895                                         __METHOD__ );
1896                                 $this->invalidateCache();
1897                         }
1898
1899                         $this->unlock(); // done
1900                 }
1901
1902                 return $this->sha1;
1903         }
1904
1905         /**
1906          * @return bool Whether to cache in RepoGroup (this avoids OOMs)
1907          */
1908         function isCacheable() {
1909                 $this->load();
1910
1911                 // If extra data (metadata) was not loaded then it must have been large
1912                 return $this->extraDataLoaded
1913                 && strlen( serialize( $this->metadata ) ) <= self::CACHE_FIELD_MAX_LEN;
1914         }
1915
1916         /**
1917          * Start an atomic DB section and lock the image for update
1918          * or increments a reference counter if the lock is already held
1919          *
1920          * @throws LocalFileLockError Throws an error if the lock was not acquired
1921          * @return bool Whether the file lock owns/spawned the DB transaction
1922          */
1923         function lock() {
1924                 if ( !$this->locked ) {
1925                         $logger = LoggerFactory::getInstance( 'LocalFile' );
1926
1927                         $dbw = $this->repo->getMasterDB();
1928                         $makesTransaction = !$dbw->trxLevel();
1929                         $dbw->startAtomic( self::ATOMIC_SECTION_LOCK );
1930                         // Bug 54736: use simple lock to handle when the file does not exist.
1931                         // SELECT FOR UPDATE prevents changes, not other SELECTs with FOR UPDATE.
1932                         // Also, that would cause contention on INSERT of similarly named rows.
1933                         $backend = $this->getRepo()->getBackend();
1934                         $lockPaths = [ $this->getPath() ]; // represents all versions of the file
1935                         $status = $backend->lockFiles( $lockPaths, LockManager::LOCK_EX, 10 );
1936                         if ( !$status->isGood() ) {
1937                                 $dbw->endAtomic( self::ATOMIC_SECTION_LOCK );
1938                                 $logger->warning( "Failed to lock '{file}'", [ 'file' => $this->name ] );
1939
1940                                 throw new LocalFileLockError( $status );
1941                         }
1942                         // Release the lock *after* commit to avoid row-level contention.
1943                         // Make sure it triggers on rollback() as well as commit() (T132921).
1944                         $dbw->onTransactionResolution( function () use ( $backend, $lockPaths, $logger ) {
1945                                 $status = $backend->unlockFiles( $lockPaths, LockManager::LOCK_EX );
1946                                 if ( !$status->isGood() ) {
1947                                         $logger->error( "Failed to unlock '{file}'", [ 'file' => $this->name ] );
1948                                 }
1949                         } );
1950                         // Callers might care if the SELECT snapshot is safely fresh
1951                         $this->lockedOwnTrx = $makesTransaction;
1952                 }
1953
1954                 $this->locked++;
1955
1956                 return $this->lockedOwnTrx;
1957         }
1958
1959         /**
1960          * Decrement the lock reference count and end the atomic section if it reaches zero
1961          *
1962          * The commit and loc release will happen when no atomic sections are active, which
1963          * may happen immediately or at some point after calling this
1964          */
1965         function unlock() {
1966                 if ( $this->locked ) {
1967                         --$this->locked;
1968                         if ( !$this->locked ) {
1969                                 $dbw = $this->repo->getMasterDB();
1970                                 $dbw->endAtomic( self::ATOMIC_SECTION_LOCK );
1971                                 $this->lockedOwnTrx = false;
1972                         }
1973                 }
1974         }
1975
1976         /**
1977          * Roll back the DB transaction and mark the image unlocked
1978          */
1979         function unlockAndRollback() {
1980                 $this->locked = false;
1981                 $dbw = $this->repo->getMasterDB();
1982                 $dbw->rollback( __METHOD__ );
1983                 $this->lockedOwnTrx = false;
1984         }
1985
1986         /**
1987          * @return Status
1988          */
1989         protected function readOnlyFatalStatus() {
1990                 return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
1991                         $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
1992         }
1993
1994         /**
1995          * Clean up any dangling locks
1996          */
1997         function __destruct() {
1998                 $this->unlock();
1999         }
2000 } // LocalFile class
2001
2002 # ------------------------------------------------------------------------------
2003
2004 /**
2005  * Helper class for file deletion
2006  * @ingroup FileAbstraction
2007  */
2008 class LocalFileDeleteBatch {
2009         /** @var LocalFile */
2010         private $file;
2011
2012         /** @var string */
2013         private $reason;
2014
2015         /** @var array */
2016         private $srcRels = [];
2017
2018         /** @var array */
2019         private $archiveUrls = [];
2020
2021         /** @var array Items to be processed in the deletion batch */
2022         private $deletionBatch;
2023
2024         /** @var bool Whether to suppress all suppressable fields when deleting */
2025         private $suppress;
2026
2027         /** @var FileRepoStatus */
2028         private $status;
2029
2030         /** @var User */
2031         private $user;
2032
2033         /**
2034          * @param File $file
2035          * @param string $reason
2036          * @param bool $suppress
2037          * @param User|null $user
2038          */
2039         function __construct( File $file, $reason = '', $suppress = false, $user = null ) {
2040                 $this->file = $file;
2041                 $this->reason = $reason;
2042                 $this->suppress = $suppress;
2043                 if ( $user ) {
2044                         $this->user = $user;
2045                 } else {
2046                         global $wgUser;
2047                         $this->user = $wgUser;
2048                 }
2049                 $this->status = $file->repo->newGood();
2050         }
2051
2052         public function addCurrent() {
2053                 $this->srcRels['.'] = $this->file->getRel();
2054         }
2055
2056         /**
2057          * @param string $oldName
2058          */
2059         public function addOld( $oldName ) {
2060                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
2061                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
2062         }
2063
2064         /**
2065          * Add the old versions of the image to the batch
2066          * @return array List of archive names from old versions
2067          */
2068         public function addOlds() {
2069                 $archiveNames = [];
2070
2071                 $dbw = $this->file->repo->getMasterDB();
2072                 $result = $dbw->select( 'oldimage',
2073                         [ 'oi_archive_name' ],
2074                         [ 'oi_name' => $this->file->getName() ],
2075                         __METHOD__
2076                 );
2077
2078                 foreach ( $result as $row ) {
2079                         $this->addOld( $row->oi_archive_name );
2080                         $archiveNames[] = $row->oi_archive_name;
2081                 }
2082
2083                 return $archiveNames;
2084         }
2085
2086         /**
2087          * @return array
2088          */
2089         protected function getOldRels() {
2090                 if ( !isset( $this->srcRels['.'] ) ) {
2091                         $oldRels =& $this->srcRels;
2092                         $deleteCurrent = false;
2093                 } else {
2094                         $oldRels = $this->srcRels;
2095                         unset( $oldRels['.'] );
2096                         $deleteCurrent = true;
2097                 }
2098
2099                 return [ $oldRels, $deleteCurrent ];
2100         }
2101
2102         /**
2103          * @return array
2104          */
2105         protected function getHashes() {
2106                 $hashes = [];
2107                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2108
2109                 if ( $deleteCurrent ) {
2110                         $hashes['.'] = $this->file->getSha1();
2111                 }
2112
2113                 if ( count( $oldRels ) ) {
2114                         $dbw = $this->file->repo->getMasterDB();
2115                         $res = $dbw->select(
2116                                 'oldimage',
2117                                 [ 'oi_archive_name', 'oi_sha1' ],
2118                                 [ 'oi_archive_name' => array_keys( $oldRels ),
2119                                         'oi_name' => $this->file->getName() ], // performance
2120                                 __METHOD__
2121                         );
2122
2123                         foreach ( $res as $row ) {
2124                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
2125                                         // Get the hash from the file
2126                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
2127                                         $props = $this->file->repo->getFileProps( $oldUrl );
2128
2129                                         if ( $props['fileExists'] ) {
2130                                                 // Upgrade the oldimage row
2131                                                 $dbw->update( 'oldimage',
2132                                                         [ 'oi_sha1' => $props['sha1'] ],
2133                                                         [ 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ],
2134                                                         __METHOD__ );
2135                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
2136                                         } else {
2137                                                 $hashes[$row->oi_archive_name] = false;
2138                                         }
2139                                 } else {
2140                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
2141                                 }
2142                         }
2143                 }
2144
2145                 $missing = array_diff_key( $this->srcRels, $hashes );
2146
2147                 foreach ( $missing as $name => $rel ) {
2148                         $this->status->error( 'filedelete-old-unregistered', $name );
2149                 }
2150
2151                 foreach ( $hashes as $name => $hash ) {
2152                         if ( !$hash ) {
2153                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
2154                                 unset( $hashes[$name] );
2155                         }
2156                 }
2157
2158                 return $hashes;
2159         }
2160
2161         protected function doDBInserts() {
2162                 $dbw = $this->file->repo->getMasterDB();
2163                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
2164                 $encUserId = $dbw->addQuotes( $this->user->getId() );
2165                 $encReason = $dbw->addQuotes( $this->reason );
2166                 $encGroup = $dbw->addQuotes( 'deleted' );
2167                 $ext = $this->file->getExtension();
2168                 $dotExt = $ext === '' ? '' : ".$ext";
2169                 $encExt = $dbw->addQuotes( $dotExt );
2170                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2171
2172                 // Bitfields to further suppress the content
2173                 if ( $this->suppress ) {
2174                         $bitfield = 0;
2175                         // This should be 15...
2176                         $bitfield |= Revision::DELETED_TEXT;
2177                         $bitfield |= Revision::DELETED_COMMENT;
2178                         $bitfield |= Revision::DELETED_USER;
2179                         $bitfield |= Revision::DELETED_RESTRICTED;
2180                 } else {
2181                         $bitfield = 'oi_deleted';
2182                 }
2183
2184                 if ( $deleteCurrent ) {
2185                         $concat = $dbw->buildConcat( [ "img_sha1", $encExt ] );
2186                         $where = [ 'img_name' => $this->file->getName() ];
2187                         $dbw->insertSelect( 'filearchive', 'image',
2188                                 [
2189                                         'fa_storage_group' => $encGroup,
2190                                         'fa_storage_key' => $dbw->conditional(
2191                                                 [ 'img_sha1' => '' ],
2192                                                 $dbw->addQuotes( '' ),
2193                                                 $concat
2194                                         ),
2195                                         'fa_deleted_user' => $encUserId,
2196                                         'fa_deleted_timestamp' => $encTimestamp,
2197                                         'fa_deleted_reason' => $encReason,
2198                                         'fa_deleted' => $this->suppress ? $bitfield : 0,
2199
2200                                         'fa_name' => 'img_name',
2201                                         'fa_archive_name' => 'NULL',
2202                                         'fa_size' => 'img_size',
2203                                         'fa_width' => 'img_width',
2204                                         'fa_height' => 'img_height',
2205                                         'fa_metadata' => 'img_metadata',
2206                                         'fa_bits' => 'img_bits',
2207                                         'fa_media_type' => 'img_media_type',
2208                                         'fa_major_mime' => 'img_major_mime',
2209                                         'fa_minor_mime' => 'img_minor_mime',
2210                                         'fa_description' => 'img_description',
2211                                         'fa_user' => 'img_user',
2212                                         'fa_user_text' => 'img_user_text',
2213                                         'fa_timestamp' => 'img_timestamp',
2214                                         'fa_sha1' => 'img_sha1',
2215                                 ], $where, __METHOD__ );
2216                 }
2217
2218                 if ( count( $oldRels ) ) {
2219                         $concat = $dbw->buildConcat( [ "oi_sha1", $encExt ] );
2220                         $where = [
2221                                 'oi_name' => $this->file->getName(),
2222                                 'oi_archive_name' => array_keys( $oldRels ) ];
2223                         $dbw->insertSelect( 'filearchive', 'oldimage',
2224                                 [
2225                                         'fa_storage_group' => $encGroup,
2226                                         'fa_storage_key' => $dbw->conditional(
2227                                                 [ 'oi_sha1' => '' ],
2228                                                 $dbw->addQuotes( '' ),
2229                                                 $concat
2230                                         ),
2231                                         'fa_deleted_user' => $encUserId,
2232                                         'fa_deleted_timestamp' => $encTimestamp,
2233                                         'fa_deleted_reason' => $encReason,
2234                                         'fa_deleted' => $this->suppress ? $bitfield : 'oi_deleted',
2235
2236                                         'fa_name' => 'oi_name',
2237                                         'fa_archive_name' => 'oi_archive_name',
2238                                         'fa_size' => 'oi_size',
2239                                         'fa_width' => 'oi_width',
2240                                         'fa_height' => 'oi_height',
2241                                         'fa_metadata' => 'oi_metadata',
2242                                         'fa_bits' => 'oi_bits',
2243                                         'fa_media_type' => 'oi_media_type',
2244                                         'fa_major_mime' => 'oi_major_mime',
2245                                         'fa_minor_mime' => 'oi_minor_mime',
2246                                         'fa_description' => 'oi_description',
2247                                         'fa_user' => 'oi_user',
2248                                         'fa_user_text' => 'oi_user_text',
2249                                         'fa_timestamp' => 'oi_timestamp',
2250                                         'fa_sha1' => 'oi_sha1',
2251                                 ], $where, __METHOD__ );
2252                 }
2253         }
2254
2255         function doDBDeletes() {
2256                 $dbw = $this->file->repo->getMasterDB();
2257                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2258
2259                 if ( count( $oldRels ) ) {
2260                         $dbw->delete( 'oldimage',
2261                                 [
2262                                         'oi_name' => $this->file->getName(),
2263                                         'oi_archive_name' => array_keys( $oldRels )
2264                                 ], __METHOD__ );
2265                 }
2266
2267                 if ( $deleteCurrent ) {
2268                         $dbw->delete( 'image', [ 'img_name' => $this->file->getName() ], __METHOD__ );
2269                 }
2270         }
2271
2272         /**
2273          * Run the transaction
2274          * @return FileRepoStatus
2275          */
2276         public function execute() {
2277                 $repo = $this->file->getRepo();
2278                 $this->file->lock();
2279
2280                 // Prepare deletion batch
2281                 $hashes = $this->getHashes();
2282                 $this->deletionBatch = [];
2283                 $ext = $this->file->getExtension();
2284                 $dotExt = $ext === '' ? '' : ".$ext";
2285
2286                 foreach ( $this->srcRels as $name => $srcRel ) {
2287                         // Skip files that have no hash (e.g. missing DB record, or sha1 field and file source)
2288                         if ( isset( $hashes[$name] ) ) {
2289                                 $hash = $hashes[$name];
2290                                 $key = $hash . $dotExt;
2291                                 $dstRel = $repo->getDeletedHashPath( $key ) . $key;
2292                                 $this->deletionBatch[$name] = [ $srcRel, $dstRel ];
2293                         }
2294                 }
2295
2296                 if ( !$repo->hasSha1Storage() ) {
2297                         // Removes non-existent file from the batch, so we don't get errors.
2298                         // This also handles files in the 'deleted' zone deleted via revision deletion.
2299                         $checkStatus = $this->removeNonexistentFiles( $this->deletionBatch );
2300                         if ( !$checkStatus->isGood() ) {
2301                                 $this->status->merge( $checkStatus );
2302                                 return $this->status;
2303                         }
2304                         $this->deletionBatch = $checkStatus->value;
2305
2306                         // Execute the file deletion batch
2307                         $status = $this->file->repo->deleteBatch( $this->deletionBatch );
2308                         if ( !$status->isGood() ) {
2309                                 $this->status->merge( $status );
2310                         }
2311                 }
2312
2313                 if ( !$this->status->isOK() ) {
2314                         // Critical file deletion error; abort
2315                         $this->file->unlock();
2316
2317                         return $this->status;
2318                 }
2319
2320                 // Copy the image/oldimage rows to filearchive
2321                 $this->doDBInserts();
2322                 // Delete image/oldimage rows
2323                 $this->doDBDeletes();
2324
2325                 // Commit and return
2326                 $this->file->unlock();
2327
2328                 return $this->status;
2329         }
2330
2331         /**
2332          * Removes non-existent files from a deletion batch.
2333          * @param array $batch
2334          * @return Status
2335          */
2336         protected function removeNonexistentFiles( $batch ) {
2337                 $files = $newBatch = [];
2338
2339                 foreach ( $batch as $batchItem ) {
2340                         list( $src, ) = $batchItem;
2341                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
2342                 }
2343
2344                 $result = $this->file->repo->fileExistsBatch( $files );
2345                 if ( in_array( null, $result, true ) ) {
2346                         return Status::newFatal( 'backend-fail-internal',
2347                                 $this->file->repo->getBackend()->getName() );
2348                 }
2349
2350                 foreach ( $batch as $batchItem ) {
2351                         if ( $result[$batchItem[0]] ) {
2352                                 $newBatch[] = $batchItem;
2353                         }
2354                 }
2355
2356                 return Status::newGood( $newBatch );
2357         }
2358 }
2359
2360 # ------------------------------------------------------------------------------
2361
2362 /**
2363  * Helper class for file undeletion
2364  * @ingroup FileAbstraction
2365  */
2366 class LocalFileRestoreBatch {
2367         /** @var LocalFile */
2368         private $file;
2369
2370         /** @var array List of file IDs to restore */
2371         private $cleanupBatch;
2372
2373         /** @var array List of file IDs to restore */
2374         private $ids;
2375
2376         /** @var bool Add all revisions of the file */
2377         private $all;
2378
2379         /** @var bool Whether to remove all settings for suppressed fields */
2380         private $unsuppress = false;
2381
2382         /**
2383          * @param File $file
2384          * @param bool $unsuppress
2385          */
2386         function __construct( File $file, $unsuppress = false ) {
2387                 $this->file = $file;
2388                 $this->cleanupBatch = $this->ids = [];
2389                 $this->ids = [];
2390                 $this->unsuppress = $unsuppress;
2391         }
2392
2393         /**
2394          * Add a file by ID
2395          * @param int $fa_id
2396          */
2397         public function addId( $fa_id ) {
2398                 $this->ids[] = $fa_id;
2399         }
2400
2401         /**
2402          * Add a whole lot of files by ID
2403          * @param int[] $ids
2404          */
2405         public function addIds( $ids ) {
2406                 $this->ids = array_merge( $this->ids, $ids );
2407         }
2408
2409         /**
2410          * Add all revisions of the file
2411          */
2412         public function addAll() {
2413                 $this->all = true;
2414         }
2415
2416         /**
2417          * Run the transaction, except the cleanup batch.
2418          * The cleanup batch should be run in a separate transaction, because it locks different
2419          * rows and there's no need to keep the image row locked while it's acquiring those locks
2420          * The caller may have its own transaction open.
2421          * So we save the batch and let the caller call cleanup()
2422          * @return FileRepoStatus
2423          */
2424         public function execute() {
2425                 global $wgLang;
2426
2427                 $repo = $this->file->getRepo();
2428                 if ( !$this->all && !$this->ids ) {
2429                         // Do nothing
2430                         return $repo->newGood();
2431                 }
2432
2433                 $lockOwnsTrx = $this->file->lock();
2434
2435                 $dbw = $this->file->repo->getMasterDB();
2436                 $status = $this->file->repo->newGood();
2437
2438                 $exists = (bool)$dbw->selectField( 'image', '1',
2439                         [ 'img_name' => $this->file->getName() ],
2440                         __METHOD__,
2441                         // The lock() should already prevents changes, but this still may need
2442                         // to bypass any transaction snapshot. However, if lock() started the
2443                         // trx (which it probably did) then snapshot is post-lock and up-to-date.
2444                         $lockOwnsTrx ? [] : [ 'LOCK IN SHARE MODE' ]
2445                 );
2446
2447                 // Fetch all or selected archived revisions for the file,
2448                 // sorted from the most recent to the oldest.
2449                 $conditions = [ 'fa_name' => $this->file->getName() ];
2450
2451                 if ( !$this->all ) {
2452                         $conditions['fa_id'] = $this->ids;
2453                 }
2454
2455                 $result = $dbw->select(
2456                         'filearchive',
2457                         ArchivedFile::selectFields(),
2458                         $conditions,
2459                         __METHOD__,
2460                         [ 'ORDER BY' => 'fa_timestamp DESC' ]
2461                 );
2462
2463                 $idsPresent = [];
2464                 $storeBatch = [];
2465                 $insertBatch = [];
2466                 $insertCurrent = false;
2467                 $deleteIds = [];
2468                 $first = true;
2469                 $archiveNames = [];
2470
2471                 foreach ( $result as $row ) {
2472                         $idsPresent[] = $row->fa_id;
2473
2474                         if ( $row->fa_name != $this->file->getName() ) {
2475                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
2476                                 $status->failCount++;
2477                                 continue;
2478                         }
2479
2480                         if ( $row->fa_storage_key == '' ) {
2481                                 // Revision was missing pre-deletion
2482                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
2483                                 $status->failCount++;
2484                                 continue;
2485                         }
2486
2487                         $deletedRel = $repo->getDeletedHashPath( $row->fa_storage_key ) .
2488                                 $row->fa_storage_key;
2489                         $deletedUrl = $repo->getVirtualUrl() . '/deleted/' . $deletedRel;
2490
2491                         if ( isset( $row->fa_sha1 ) ) {
2492                                 $sha1 = $row->fa_sha1;
2493                         } else {
2494                                 // old row, populate from key
2495                                 $sha1 = LocalRepo::getHashFromKey( $row->fa_storage_key );
2496                         }
2497
2498                         # Fix leading zero
2499                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
2500                                 $sha1 = substr( $sha1, 1 );
2501                         }
2502
2503                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
2504                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
2505                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
2506                                 || is_null( $row->fa_metadata )
2507                         ) {
2508                                 // Refresh our metadata
2509                                 // Required for a new current revision; nice for older ones too. :)
2510                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
2511                         } else {
2512                                 $props = [
2513                                         'minor_mime' => $row->fa_minor_mime,
2514                                         'major_mime' => $row->fa_major_mime,
2515                                         'media_type' => $row->fa_media_type,
2516                                         'metadata' => $row->fa_metadata
2517                                 ];
2518                         }
2519
2520                         if ( $first && !$exists ) {
2521                                 // This revision will be published as the new current version
2522                                 $destRel = $this->file->getRel();
2523                                 $insertCurrent = [
2524                                         'img_name' => $row->fa_name,
2525                                         'img_size' => $row->fa_size,
2526                                         'img_width' => $row->fa_width,
2527                                         'img_height' => $row->fa_height,
2528                                         'img_metadata' => $props['metadata'],
2529                                         'img_bits' => $row->fa_bits,
2530                                         'img_media_type' => $props['media_type'],
2531                                         'img_major_mime' => $props['major_mime'],
2532                                         'img_minor_mime' => $props['minor_mime'],
2533                                         'img_description' => $row->fa_description,
2534                                         'img_user' => $row->fa_user,
2535                                         'img_user_text' => $row->fa_user_text,
2536                                         'img_timestamp' => $row->fa_timestamp,
2537                                         'img_sha1' => $sha1
2538                                 ];
2539
2540                                 // The live (current) version cannot be hidden!
2541                                 if ( !$this->unsuppress && $row->fa_deleted ) {
2542                                         $storeBatch[] = [ $deletedUrl, 'public', $destRel ];
2543                                         $this->cleanupBatch[] = $row->fa_storage_key;
2544                                 }
2545                         } else {
2546                                 $archiveName = $row->fa_archive_name;
2547
2548                                 if ( $archiveName == '' ) {
2549                                         // This was originally a current version; we
2550                                         // have to devise a new archive name for it.
2551                                         // Format is <timestamp of archiving>!<name>
2552                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
2553
2554                                         do {
2555                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
2556                                                 $timestamp++;
2557                                         } while ( isset( $archiveNames[$archiveName] ) );
2558                                 }
2559
2560                                 $archiveNames[$archiveName] = true;
2561                                 $destRel = $this->file->getArchiveRel( $archiveName );
2562                                 $insertBatch[] = [
2563                                         'oi_name' => $row->fa_name,
2564                                         'oi_archive_name' => $archiveName,
2565                                         'oi_size' => $row->fa_size,
2566                                         'oi_width' => $row->fa_width,
2567                                         'oi_height' => $row->fa_height,
2568                                         'oi_bits' => $row->fa_bits,
2569                                         'oi_description' => $row->fa_description,
2570                                         'oi_user' => $row->fa_user,
2571                                         'oi_user_text' => $row->fa_user_text,
2572                                         'oi_timestamp' => $row->fa_timestamp,
2573                                         'oi_metadata' => $props['metadata'],
2574                                         'oi_media_type' => $props['media_type'],
2575                                         'oi_major_mime' => $props['major_mime'],
2576                                         'oi_minor_mime' => $props['minor_mime'],
2577                                         'oi_deleted' => $this->unsuppress ? 0 : $row->fa_deleted,
2578                                         'oi_sha1' => $sha1 ];
2579                         }
2580
2581                         $deleteIds[] = $row->fa_id;
2582
2583                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
2584                                 // private files can stay where they are
2585                                 $status->successCount++;
2586                         } else {
2587                                 $storeBatch[] = [ $deletedUrl, 'public', $destRel ];
2588                                 $this->cleanupBatch[] = $row->fa_storage_key;
2589                         }
2590
2591                         $first = false;
2592                 }
2593
2594                 unset( $result );
2595
2596                 // Add a warning to the status object for missing IDs
2597                 $missingIds = array_diff( $this->ids, $idsPresent );
2598
2599                 foreach ( $missingIds as $id ) {
2600                         $status->error( 'undelete-missing-filearchive', $id );
2601                 }
2602
2603                 if ( !$repo->hasSha1Storage() ) {
2604                         // Remove missing files from batch, so we don't get errors when undeleting them
2605                         $checkStatus = $this->removeNonexistentFiles( $storeBatch );
2606                         if ( !$checkStatus->isGood() ) {
2607                                 $status->merge( $checkStatus );
2608                                 return $status;
2609                         }
2610                         $storeBatch = $checkStatus->value;
2611
2612                         // Run the store batch
2613                         // Use the OVERWRITE_SAME flag to smooth over a common error
2614                         $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
2615                         $status->merge( $storeStatus );
2616
2617                         if ( !$status->isGood() ) {
2618                                 // Even if some files could be copied, fail entirely as that is the
2619                                 // easiest thing to do without data loss
2620                                 $this->cleanupFailedBatch( $storeStatus, $storeBatch );
2621                                 $status->ok = false;
2622                                 $this->file->unlock();
2623
2624                                 return $status;
2625                         }
2626                 }
2627
2628                 // Run the DB updates
2629                 // Because we have locked the image row, key conflicts should be rare.
2630                 // If they do occur, we can roll back the transaction at this time with
2631                 // no data loss, but leaving unregistered files scattered throughout the
2632                 // public zone.
2633                 // This is not ideal, which is why it's important to lock the image row.
2634                 if ( $insertCurrent ) {
2635                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
2636                 }
2637
2638                 if ( $insertBatch ) {
2639                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
2640                 }
2641
2642                 if ( $deleteIds ) {
2643                         $dbw->delete( 'filearchive',
2644                                 [ 'fa_id' => $deleteIds ],
2645                                 __METHOD__ );
2646                 }
2647
2648                 // If store batch is empty (all files are missing), deletion is to be considered successful
2649                 if ( $status->successCount > 0 || !$storeBatch || $repo->hasSha1Storage() ) {
2650                         if ( !$exists ) {
2651                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
2652
2653                                 DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => 1 ] ) );
2654
2655                                 $this->file->purgeEverything();
2656                         } else {
2657                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
2658                                 $this->file->purgeDescription();
2659                         }
2660                 }
2661
2662                 $this->file->unlock();
2663
2664                 return $status;
2665         }
2666
2667         /**
2668          * Removes non-existent files from a store batch.
2669          * @param array $triplets
2670          * @return Status
2671          */
2672         protected function removeNonexistentFiles( $triplets ) {
2673                 $files = $filteredTriplets = [];
2674                 foreach ( $triplets as $file ) {
2675                         $files[$file[0]] = $file[0];
2676                 }
2677
2678                 $result = $this->file->repo->fileExistsBatch( $files );
2679                 if ( in_array( null, $result, true ) ) {
2680                         return Status::newFatal( 'backend-fail-internal',
2681                                 $this->file->repo->getBackend()->getName() );
2682                 }
2683
2684                 foreach ( $triplets as $file ) {
2685                         if ( $result[$file[0]] ) {
2686                                 $filteredTriplets[] = $file;
2687                         }
2688                 }
2689
2690                 return Status::newGood( $filteredTriplets );
2691         }
2692
2693         /**
2694          * Removes non-existent files from a cleanup batch.
2695          * @param array $batch
2696          * @return array
2697          */
2698         protected function removeNonexistentFromCleanup( $batch ) {
2699                 $files = $newBatch = [];
2700                 $repo = $this->file->repo;
2701
2702                 foreach ( $batch as $file ) {
2703                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
2704                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
2705                 }
2706
2707                 $result = $repo->fileExistsBatch( $files );
2708
2709                 foreach ( $batch as $file ) {
2710                         if ( $result[$file] ) {
2711                                 $newBatch[] = $file;
2712                         }
2713                 }
2714
2715                 return $newBatch;
2716         }
2717
2718         /**
2719          * Delete unused files in the deleted zone.
2720          * This should be called from outside the transaction in which execute() was called.
2721          * @return FileRepoStatus
2722          */
2723         public function cleanup() {
2724                 if ( !$this->cleanupBatch ) {
2725                         return $this->file->repo->newGood();
2726                 }
2727
2728                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
2729
2730                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
2731
2732                 return $status;
2733         }
2734
2735         /**
2736          * Cleanup a failed batch. The batch was only partially successful, so
2737          * rollback by removing all items that were succesfully copied.
2738          *
2739          * @param Status $storeStatus
2740          * @param array $storeBatch
2741          */
2742         protected function cleanupFailedBatch( $storeStatus, $storeBatch ) {
2743                 $cleanupBatch = [];
2744
2745                 foreach ( $storeStatus->success as $i => $success ) {
2746                         // Check if this item of the batch was successfully copied
2747                         if ( $success ) {
2748                                 // Item was successfully copied and needs to be removed again
2749                                 // Extract ($dstZone, $dstRel) from the batch
2750                                 $cleanupBatch[] = [ $storeBatch[$i][1], $storeBatch[$i][2] ];
2751                         }
2752                 }
2753                 $this->file->repo->cleanupBatch( $cleanupBatch );
2754         }
2755 }
2756
2757 # ------------------------------------------------------------------------------
2758
2759 /**
2760  * Helper class for file movement
2761  * @ingroup FileAbstraction
2762  */
2763 class LocalFileMoveBatch {
2764         /** @var LocalFile */
2765         protected $file;
2766
2767         /** @var Title */
2768         protected $target;
2769
2770         protected $cur;
2771
2772         protected $olds;
2773
2774         protected $oldCount;
2775
2776         protected $archive;
2777
2778         /** @var DatabaseBase */
2779         protected $db;
2780
2781         /**
2782          * @param File $file
2783          * @param Title $target
2784          */
2785         function __construct( File $file, Title $target ) {
2786                 $this->file = $file;
2787                 $this->target = $target;
2788                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
2789                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
2790                 $this->oldName = $this->file->getName();
2791                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2792                 $this->oldRel = $this->oldHash . $this->oldName;
2793                 $this->newRel = $this->newHash . $this->newName;
2794                 $this->db = $file->getRepo()->getMasterDB();
2795         }
2796
2797         /**
2798          * Add the current image to the batch
2799          */
2800         public function addCurrent() {
2801                 $this->cur = [ $this->oldRel, $this->newRel ];
2802         }
2803
2804         /**
2805          * Add the old versions of the image to the batch
2806          * @return array List of archive names from old versions
2807          */
2808         public function addOlds() {
2809                 $archiveBase = 'archive';
2810                 $this->olds = [];
2811                 $this->oldCount = 0;
2812                 $archiveNames = [];
2813
2814                 $result = $this->db->select( 'oldimage',
2815                         [ 'oi_archive_name', 'oi_deleted' ],
2816                         [ 'oi_name' => $this->oldName ],
2817                         __METHOD__,
2818                         [ 'LOCK IN SHARE MODE' ] // ignore snapshot
2819                 );
2820
2821                 foreach ( $result as $row ) {
2822                         $archiveNames[] = $row->oi_archive_name;
2823                         $oldName = $row->oi_archive_name;
2824                         $bits = explode( '!', $oldName, 2 );
2825
2826                         if ( count( $bits ) != 2 ) {
2827                                 wfDebug( "Old file name missing !: '$oldName' \n" );
2828                                 continue;
2829                         }
2830
2831                         list( $timestamp, $filename ) = $bits;
2832
2833                         if ( $this->oldName != $filename ) {
2834                                 wfDebug( "Old file name doesn't match: '$oldName' \n" );
2835                                 continue;
2836                         }
2837
2838                         $this->oldCount++;
2839
2840                         // Do we want to add those to oldCount?
2841                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2842                                 continue;
2843                         }
2844
2845                         $this->olds[] = [
2846                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2847                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2848                         ];
2849                 }
2850
2851                 return $archiveNames;
2852         }
2853
2854         /**
2855          * Perform the move.
2856          * @return FileRepoStatus
2857          */
2858         public function execute() {
2859                 $repo = $this->file->repo;
2860                 $status = $repo->newGood();
2861
2862                 $triplets = $this->getMoveTriplets();
2863                 $checkStatus = $this->removeNonexistentFiles( $triplets );
2864                 if ( !$checkStatus->isGood() ) {
2865                         $status->merge( $checkStatus );
2866                         return $status;
2867                 }
2868                 $triplets = $checkStatus->value;
2869                 $destFile = wfLocalFile( $this->target );
2870
2871                 $this->file->lock(); // begin
2872                 $destFile->lock(); // quickly fail if destination is not available
2873                 // Rename the file versions metadata in the DB.
2874                 // This implicitly locks the destination file, which avoids race conditions.
2875                 // If we moved the files from A -> C before DB updates, another process could
2876                 // move files from B -> C at this point, causing storeBatch() to fail and thus
2877                 // cleanupTarget() to trigger. It would delete the C files and cause data loss.
2878                 $statusDb = $this->doDBUpdates();
2879                 if ( !$statusDb->isGood() ) {
2880                         $destFile->unlock();
2881                         $this->file->unlockAndRollback();
2882                         $statusDb->ok = false;
2883
2884                         return $statusDb;
2885                 }
2886                 wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: " .
2887                         "{$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2888
2889                 if ( !$repo->hasSha1Storage() ) {
2890                         // Copy the files into their new location.
2891                         // If a prior process fataled copying or cleaning up files we tolerate any
2892                         // of the existing files if they are identical to the ones being stored.
2893                         $statusMove = $repo->storeBatch( $triplets, FileRepo::OVERWRITE_SAME );
2894                         wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: " .
2895                                 "{$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2896                         if ( !$statusMove->isGood() ) {
2897                                 // Delete any files copied over (while the destination is still locked)
2898                                 $this->cleanupTarget( $triplets );
2899                                 $destFile->unlock();
2900                                 $this->file->unlockAndRollback(); // unlocks the destination
2901                                 wfDebugLog( 'imagemove', "Error in moving files: "
2902                                         . $statusMove->getWikiText( false, false, 'en' ) );
2903                                 $statusMove->ok = false;
2904
2905                                 return $statusMove;
2906                         }
2907                         $status->merge( $statusMove );
2908                 }
2909
2910                 $destFile->unlock();
2911                 $this->file->unlock(); // done
2912
2913                 // Everything went ok, remove the source files
2914                 $this->cleanupSource( $triplets );
2915
2916                 $status->merge( $statusDb );
2917
2918                 return $status;
2919         }
2920
2921         /**
2922          * Do the database updates and return a new FileRepoStatus indicating how
2923          * many rows where updated.
2924          *
2925          * @return FileRepoStatus
2926          */
2927         protected function doDBUpdates() {
2928                 $repo = $this->file->repo;
2929                 $status = $repo->newGood();
2930                 $dbw = $this->db;
2931
2932                 // Update current image
2933                 $dbw->update(
2934                         'image',
2935                         [ 'img_name' => $this->newName ],
2936                         [ 'img_name' => $this->oldName ],
2937                         __METHOD__
2938                 );
2939
2940                 if ( $dbw->affectedRows() ) {
2941                         $status->successCount++;
2942                 } else {
2943                         $status->failCount++;
2944                         $status->fatal( 'imageinvalidfilename' );
2945
2946                         return $status;
2947                 }
2948
2949                 // Update old images
2950                 $dbw->update(
2951                         'oldimage',
2952                         [
2953                                 'oi_name' => $this->newName,
2954                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name',
2955                                         $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2956                         ],
2957                         [ 'oi_name' => $this->oldName ],
2958                         __METHOD__
2959                 );
2960
2961                 $affected = $dbw->affectedRows();
2962                 $total = $this->oldCount;
2963                 $status->successCount += $affected;
2964                 // Bug 34934: $total is based on files that actually exist.
2965                 // There may be more DB rows than such files, in which case $affected
2966                 // can be greater than $total. We use max() to avoid negatives here.
2967                 $status->failCount += max( 0, $total - $affected );
2968                 if ( $status->failCount ) {
2969                         $status->error( 'imageinvalidfilename' );
2970                 }
2971
2972                 return $status;
2973         }
2974
2975         /**
2976          * Generate triplets for FileRepo::storeBatch().
2977          * @return array
2978          */
2979         protected function getMoveTriplets() {
2980                 $moves = array_merge( [ $this->cur ], $this->olds );
2981                 $triplets = []; // The format is: (srcUrl, destZone, destUrl)
2982
2983                 foreach ( $moves as $move ) {
2984                         // $move: (oldRelativePath, newRelativePath)
2985                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2986                         $triplets[] = [ $srcUrl, 'public', $move[1] ];
2987                         wfDebugLog(
2988                                 'imagemove',
2989                                 "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}"
2990                         );
2991                 }
2992
2993                 return $triplets;
2994         }
2995
2996         /**
2997          * Removes non-existent files from move batch.
2998          * @param array $triplets
2999          * @return Status
3000          */
3001         protected function removeNonexistentFiles( $triplets ) {
3002                 $files = [];
3003
3004                 foreach ( $triplets as $file ) {
3005                         $files[$file[0]] = $file[0];
3006                 }
3007
3008                 $result = $this->file->repo->fileExistsBatch( $files );
3009                 if ( in_array( null, $result, true ) ) {
3010                         return Status::newFatal( 'backend-fail-internal',
3011                                 $this->file->repo->getBackend()->getName() );
3012                 }
3013
3014                 $filteredTriplets = [];
3015                 foreach ( $triplets as $file ) {
3016                         if ( $result[$file[0]] ) {
3017                                 $filteredTriplets[] = $file;
3018                         } else {
3019                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
3020                         }
3021                 }
3022
3023                 return Status::newGood( $filteredTriplets );
3024         }
3025
3026         /**
3027          * Cleanup a partially moved array of triplets by deleting the target
3028          * files. Called if something went wrong half way.
3029          * @param array $triplets
3030          */
3031         protected function cleanupTarget( $triplets ) {
3032                 // Create dest pairs from the triplets
3033                 $pairs = [];
3034                 foreach ( $triplets as $triplet ) {
3035                         // $triplet: (old source virtual URL, dst zone, dest rel)
3036                         $pairs[] = [ $triplet[1], $triplet[2] ];
3037                 }
3038
3039                 $this->file->repo->cleanupBatch( $pairs );
3040         }
3041
3042         /**
3043          * Cleanup a fully moved array of triplets by deleting the source files.
3044          * Called at the end of the move process if everything else went ok.
3045          * @param array $triplets
3046          */
3047         protected function cleanupSource( $triplets ) {
3048                 // Create source file names from the triplets
3049                 $files = [];
3050                 foreach ( $triplets as $triplet ) {
3051                         $files[] = $triplet[0];
3052                 }
3053
3054                 $this->file->repo->cleanupBatch( $files );
3055         }
3056 }
3057
3058 class LocalFileLockError extends ErrorPageError {
3059         public function __construct( Status $status ) {
3060                 parent::__construct(
3061                         'actionfailed',
3062                         $status->getMessage()
3063                 );
3064         }
3065
3066         public function report() {
3067                 global $wgOut;
3068                 $wgOut->setStatusCode( 429 );
3069                 parent::report();
3070         }
3071 }