includes/filerepo/file/LocalFile.php

   1 <?php
   2 /**
   3  * Local file in the wiki's own database.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup FileAbstraction
  22  */
  23
  24 /**
  25  * Bump this number when serialized cache records may be incompatible.
  26  */
  27 define( 'MW_FILE_VERSION', 9 );
  28
  29 /**
  30  * Class to represent a local file in the wiki's own database
  31  *
  32  * Provides methods to retrieve paths (physical, logical, URL),
  33  * to generate image thumbnails or for uploading.
  34  *
  35  * Note that only the repo object knows what its file class is called. You should
  36  * never name a file class explictly outside of the repo class. Instead use the
  37  * repo's factory functions to generate file objects, for example:
  38  *
  39  * RepoGroup::singleton()->getLocalRepo()->newFile( $title );
  40  *
  41  * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
  42  * in most cases.
  43  *
  44  * @ingroup FileAbstraction
  45  */
  46 class LocalFile extends File {
  47         const CACHE_FIELD_MAX_LEN = 1000;
  48
  49         /** @var bool Does the file exist on disk? (loadFromXxx) */
  50         protected $fileExists;
  51
  52         /** @var int Image width */
  53         protected $width;
  54
  55         /** @var int Image height */
  56         protected $height;
  57
  58         /** @var int Returned by getimagesize (loadFromXxx) */
  59         protected $bits;
  60
  61         /** @var string MEDIATYPE_xxx (bitmap, drawing, audio...) */
  62         protected $media_type;
  63
  64         /** @var string MIME type, determined by MimeMagic::guessMimeType */
  65         protected $mime;
  66
  67         /** @var int Size in bytes (loadFromXxx) */
  68         protected $size;
  69
  70         /** @var string Handler-specific metadata */
  71         protected $metadata;
  72
  73         /** @var string SHA-1 base 36 content hash */
  74         protected $sha1;
  75
  76         /** @var bool Whether or not core data has been loaded from the database (loadFromXxx) */
  77         protected $dataLoaded;
  78
  79         /** @var bool Whether or not lazy-loaded data has been loaded from the database */
  80         protected $extraDataLoaded;
  81
  82         /** @var int Bitfield akin to rev_deleted */
  83         protected $deleted;
  84
  85         /** @var string */
  86         protected $repoClass = 'LocalRepo';
  87
  88         /** @var int Number of line to return by nextHistoryLine() (constructor) */
  89         private $historyLine;
  90
  91         /** @var int Result of the query for the file's history (nextHistoryLine) */
  92         private $historyRes;
  93
  94         /** @var string Major MIME type */
  95         private $major_mime;
  96
  97         /** @var string Minor MIME type */
  98         private $minor_mime;
  99
 100         /** @var string Upload timestamp */
 101         private $timestamp;
 102
 103         /** @var int User ID of uploader */
 104         private $user;
 105
 106         /** @var string User name of uploader */
 107         private $user_text;
 108
 109         /** @var string Description of current revision of the file */
 110         private $description;
 111
 112         /** @var string TS_MW timestamp of the last change of the file description */
 113         private $descriptionTouched;
 114
 115         /** @var bool Whether the row was upgraded on load */
 116         private $upgraded;
 117
 118         /** @var bool True if the image row is locked */
 119         private $locked;
 120
 121         /** @var bool True if the image row is locked with a lock initiated transaction */
 122         private $lockedOwnTrx;
 123
 124         /** @var bool True if file is not present in file system. Not to be cached in memcached */
 125         private $missing;
 126
 127         // @note: higher than IDBAccessObject constants
 128         const LOAD_ALL = 16; // integer; load all the lazy fields too (like metadata)
 129
 130         /**
 131          * Create a LocalFile from a title
 132          * Do not call this except from inside a repo class.
 133          *
 134          * Note: $unused param is only here to avoid an E_STRICT
 135          *
 136          * @param Title $title
 137          * @param FileRepo $repo
 138          * @param null $unused
 139          *
 140          * @return LocalFile
 141          */
 142         static function newFromTitle( $title, $repo, $unused = null ) {
 143                 return new self( $title, $repo );
 144         }
 145
 146         /**
 147          * Create a LocalFile from a title
 148          * Do not call this except from inside a repo class.
 149          *
 150          * @param stdClass $row
 151          * @param FileRepo $repo
 152          *
 153          * @return LocalFile
 154          */
 155         static function newFromRow( $row, $repo ) {
 156                 $title = Title::makeTitle( NS_FILE, $row->img_name );
 157                 $file = new self( $title, $repo );
 158                 $file->loadFromRow( $row );
 159
 160                 return $file;
 161         }
 162
 163         /**
 164          * Create a LocalFile from a SHA-1 key
 165          * Do not call this except from inside a repo class.
 166          *
 167          * @param string $sha1 Base-36 SHA-1
 168          * @param LocalRepo $repo
 169          * @param string|bool $timestamp MW_timestamp (optional)
 170          * @return bool|LocalFile
 171          */
 172         static function newFromKey( $sha1, $repo, $timestamp = false ) {
 173                 $dbr = $repo->getSlaveDB();
 174
 175                 $conds = array( 'img_sha1' => $sha1 );
 176                 if ( $timestamp ) {
 177                         $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
 178                 }
 179
 180                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
 181                 if ( $row ) {
 182                         return self::newFromRow( $row, $repo );
 183                 } else {
 184                         return false;
 185                 }
 186         }
 187
 188         /**
 189          * Fields in the image table
 190          * @return array
 191          */
 192         static function selectFields() {
 193                 return array(
 194                         'img_name',
 195                         'img_size',
 196                         'img_width',
 197                         'img_height',
 198                         'img_metadata',
 199                         'img_bits',
 200                         'img_media_type',
 201                         'img_major_mime',
 202                         'img_minor_mime',
 203                         'img_description',
 204                         'img_user',
 205                         'img_user_text',
 206                         'img_timestamp',
 207                         'img_sha1',
 208                 );
 209         }
 210
 211         /**
 212          * Constructor.
 213          * Do not call this except from inside a repo class.
 214          * @param Title $title
 215          * @param FileRepo $repo
 216          */
 217         function __construct( $title, $repo ) {
 218                 parent::__construct( $title, $repo );
 219
 220                 $this->metadata = '';
 221                 $this->historyLine = 0;
 222                 $this->historyRes = null;
 223                 $this->dataLoaded = false;
 224                 $this->extraDataLoaded = false;
 225
 226                 $this->assertRepoDefined();
 227                 $this->assertTitleDefined();
 228         }
 229
 230         /**
 231          * Get the memcached key for the main data for this file, or false if
 232          * there is no access to the shared cache.
 233          * @return string|bool
 234          */
 235         function getCacheKey() {
 236                 $hashedName = md5( $this->getName() );
 237
 238                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 239         }
 240
 241         /**
 242          * Try to load file metadata from memcached. Returns true on success.
 243          * @return bool
 244          */
 245         function loadFromCache() {
 246                 $this->dataLoaded = false;
 247                 $this->extraDataLoaded = false;
 248                 $key = $this->getCacheKey();
 249
 250                 if ( !$key ) {
 251                         return false;
 252                 }
 253
 254                 $cache = ObjectCache::getMainWANInstance();
 255                 $cachedValues = $cache->get( $key );
 256
 257                 // Check if the key existed and belongs to this version of MediaWiki
 258                 if ( is_array( $cachedValues ) && $cachedValues['version'] == MW_FILE_VERSION ) {
 259                         $this->fileExists = $cachedValues['fileExists'];
 260                         if ( $this->fileExists ) {
 261                                 $this->setProps( $cachedValues );
 262                         }
 263                         $this->dataLoaded = true;
 264                         $this->extraDataLoaded = true;
 265                         foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 266                                 $this->extraDataLoaded = $this->extraDataLoaded && isset( $cachedValues[$field] );
 267                         }
 268                 }
 269
 270                 if ( $this->dataLoaded ) {
 271                         wfIncrStats( 'image_cache.hit' );
 272                 } else {
 273                         wfIncrStats( 'image_cache.miss' );
 274                 }
 275
 276                 return $this->dataLoaded;
 277         }
 278
 279         /**
 280          * Save the file metadata to memcached
 281          */
 282         function saveToCache() {
 283                 $this->load();
 284
 285                 $key = $this->getCacheKey();
 286                 if ( !$key ) {
 287                         return;
 288                 }
 289
 290                 $fields = $this->getCacheFields( '' );
 291                 $cacheVal = array( 'version' => MW_FILE_VERSION );
 292                 $cacheVal['fileExists'] = $this->fileExists;
 293
 294                 if ( $this->fileExists ) {
 295                         foreach ( $fields as $field ) {
 296                                 $cacheVal[$field] = $this->$field;
 297                         }
 298                 }
 299
 300                 // Strip off excessive entries from the subset of fields that can become large.
 301                 // If the cache value gets to large it will not fit in memcached and nothing will
 302                 // get cached at all, causing master queries for any file access.
 303                 foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 304                         if ( isset( $cacheVal[$field] ) && strlen( $cacheVal[$field] ) > 100 * 1024 ) {
 305                                 unset( $cacheVal[$field] ); // don't let the value get too big
 306                         }
 307                 }
 308
 309                 // Cache presence for 1 week and negatives for 1 day
 310                 $ttl = $this->fileExists ? 86400 * 7 : 86400;
 311                 $opts = Database::getCacheSetOptions( $this->repo->getSlaveDB() );
 312                 ObjectCache::getMainWANInstance()->set( $key, $cacheVal, $ttl, $opts );
 313         }
 314
 315         /**
 316          * Purge the file object/metadata cache
 317          */
 318         public function invalidateCache() {
 319                 $key = $this->getCacheKey();
 320                 if ( !$key ) {
 321                         return;
 322                 }
 323
 324                 $this->repo->getMasterDB()->onTransactionPreCommitOrIdle( function() use ( $key ) {
 325                         ObjectCache::getMainWANInstance()->delete( $key );
 326                 } );
 327         }
 328
 329         /**
 330          * Load metadata from the file itself
 331          */
 332         function loadFromFile() {
 333                 $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 334                 $this->setProps( $props );
 335         }
 336
 337         /**
 338          * @param string $prefix
 339          * @return array
 340          */
 341         function getCacheFields( $prefix = 'img_' ) {
 342                 static $fields = array( 'size', 'width', 'height', 'bits', 'media_type',
 343                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user',
 344                         'user_text', 'description' );
 345                 static $results = array();
 346
 347                 if ( $prefix == '' ) {
 348                         return $fields;
 349                 }
 350
 351                 if ( !isset( $results[$prefix] ) ) {
 352                         $prefixedFields = array();
 353                         foreach ( $fields as $field ) {
 354                                 $prefixedFields[] = $prefix . $field;
 355                         }
 356                         $results[$prefix] = $prefixedFields;
 357                 }
 358
 359                 return $results[$prefix];
 360         }
 361
 362         /**
 363          * @param string $prefix
 364          * @return array
 365          */
 366         function getLazyCacheFields( $prefix = 'img_' ) {
 367                 static $fields = array( 'metadata' );
 368                 static $results = array();
 369
 370                 if ( $prefix == '' ) {
 371                         return $fields;
 372                 }
 373
 374                 if ( !isset( $results[$prefix] ) ) {
 375                         $prefixedFields = array();
 376                         foreach ( $fields as $field ) {
 377                                 $prefixedFields[] = $prefix . $field;
 378                         }
 379                         $results[$prefix] = $prefixedFields;
 380                 }
 381
 382                 return $results[$prefix];
 383         }
 384
 385         /**
 386          * Load file metadata from the DB
 387          * @param int $flags
 388          */
 389         function loadFromDB( $flags = 0 ) {
 390                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 391
 392                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 393                 $this->dataLoaded = true;
 394                 $this->extraDataLoaded = true;
 395
 396                 $dbr = ( $flags & self::READ_LATEST )
 397                         ? $this->repo->getMasterDB()
 398                         : $this->repo->getSlaveDB();
 399
 400                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 401                         array( 'img_name' => $this->getName() ), $fname );
 402
 403                 if ( $row ) {
 404                         $this->loadFromRow( $row );
 405                 } else {
 406                         $this->fileExists = false;
 407                 }
 408         }
 409
 410         /**
 411          * Load lazy file metadata from the DB.
 412          * This covers fields that are sometimes not cached.
 413          */
 414         protected function loadExtraFromDB() {
 415                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 416
 417                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 418                 $this->extraDataLoaded = true;
 419
 420                 $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getSlaveDB(), $fname );
 421                 if ( !$fieldMap ) {
 422                         $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getMasterDB(), $fname );
 423                 }
 424
 425                 if ( $fieldMap ) {
 426                         foreach ( $fieldMap as $name => $value ) {
 427                                 $this->$name = $value;
 428                         }
 429                 } else {
 430                         throw new MWException( "Could not find data for image '{$this->getName()}'." );
 431                 }
 432         }
 433
 434         /**
 435          * @param IDatabase $dbr
 436          * @param string $fname
 437          * @return array|bool
 438          */
 439         private function loadFieldsWithTimestamp( $dbr, $fname ) {
 440                 $fieldMap = false;
 441
 442                 $row = $dbr->selectRow( 'image', $this->getLazyCacheFields( 'img_' ),
 443                         array( 'img_name' => $this->getName(), 'img_timestamp' => $this->getTimestamp() ),
 444                         $fname );
 445                 if ( $row ) {
 446                         $fieldMap = $this->unprefixRow( $row, 'img_' );
 447                 } else {
 448                         # File may have been uploaded over in the meantime; check the old versions
 449                         $row = $dbr->selectRow( 'oldimage', $this->getLazyCacheFields( 'oi_' ),
 450                                 array( 'oi_name' => $this->getName(), 'oi_timestamp' => $this->getTimestamp() ),
 451                                 $fname );
 452                         if ( $row ) {
 453                                 $fieldMap = $this->unprefixRow( $row, 'oi_' );
 454                         }
 455                 }
 456
 457                 return $fieldMap;
 458         }
 459
 460         /**
 461          * @param array|object $row
 462          * @param string $prefix
 463          * @throws MWException
 464          * @return array
 465          */
 466         protected function unprefixRow( $row, $prefix = 'img_' ) {
 467                 $array = (array)$row;
 468                 $prefixLength = strlen( $prefix );
 469
 470                 // Sanity check prefix once
 471                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 472                         throw new MWException( __METHOD__ . ': incorrect $prefix parameter' );
 473                 }
 474
 475                 $decoded = array();
 476                 foreach ( $array as $name => $value ) {
 477                         $decoded[substr( $name, $prefixLength )] = $value;
 478                 }
 479
 480                 return $decoded;
 481         }
 482
 483         /**
 484          * Decode a row from the database (either object or array) to an array
 485          * with timestamps and MIME types decoded, and the field prefix removed.
 486          * @param object $row
 487          * @param string $prefix
 488          * @throws MWException
 489          * @return array
 490          */
 491         function decodeRow( $row, $prefix = 'img_' ) {
 492                 $decoded = $this->unprefixRow( $row, $prefix );
 493
 494                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 495
 496                 $decoded['metadata'] = $this->repo->getSlaveDB()->decodeBlob( $decoded['metadata'] );
 497
 498                 if ( empty( $decoded['major_mime'] ) ) {
 499                         $decoded['mime'] = 'unknown/unknown';
 500                 } else {
 501                         if ( !$decoded['minor_mime'] ) {
 502                                 $decoded['minor_mime'] = 'unknown';
 503                         }
 504                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 505                 }
 506
 507                 // Trim zero padding from char/binary field
 508                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 509
 510                 // Normalize some fields to integer type, per their database definition.
 511                 // Use unary + so that overflows will be upgraded to double instead of
 512                 // being trucated as with intval(). This is important to allow >2GB
 513                 // files on 32-bit systems.
 514                 foreach ( array( 'size', 'width', 'height', 'bits' ) as $field ) {
 515                         $decoded[$field] = +$decoded[$field];
 516                 }
 517
 518                 return $decoded;
 519         }
 520
 521         /**
 522          * Load file metadata from a DB result row
 523          *
 524          * @param object $row
 525          * @param string $prefix
 526          */
 527         function loadFromRow( $row, $prefix = 'img_' ) {
 528                 $this->dataLoaded = true;
 529                 $this->extraDataLoaded = true;
 530
 531                 $array = $this->decodeRow( $row, $prefix );
 532
 533                 foreach ( $array as $name => $value ) {
 534                         $this->$name = $value;
 535                 }
 536
 537                 $this->fileExists = true;
 538                 $this->maybeUpgradeRow();
 539         }
 540
 541         /**
 542          * Load file metadata from cache or DB, unless already loaded
 543          * @param int $flags
 544          */
 545         function load( $flags = 0 ) {
 546                 if ( !$this->dataLoaded ) {
 547                         if ( ( $flags & self::READ_LATEST ) || !$this->loadFromCache() ) {
 548                                 $this->loadFromDB( $flags );
 549                                 $this->saveToCache();
 550                         }
 551                         $this->dataLoaded = true;
 552                 }
 553                 if ( ( $flags & self::LOAD_ALL ) && !$this->extraDataLoaded ) {
 554                         // @note: loads on name/timestamp to reduce race condition problems
 555                         $this->loadExtraFromDB();
 556                 }
 557         }
 558
 559         /**
 560          * Upgrade a row if it needs it
 561          */
 562         function maybeUpgradeRow() {
 563                 global $wgUpdateCompatibleMetadata;
 564                 if ( wfReadOnly() ) {
 565                         return;
 566                 }
 567
 568                 if ( is_null( $this->media_type ) ||
 569                         $this->mime == 'image/svg'
 570                 ) {
 571                         $this->upgradeRow();
 572                         $this->upgraded = true;
 573                 } else {
 574                         $handler = $this->getHandler();
 575                         if ( $handler ) {
 576                                 $validity = $handler->isMetadataValid( $this, $this->getMetadata() );
 577                                 if ( $validity === MediaHandler::METADATA_BAD
 578                                         || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata )
 579                                 ) {
 580                                         $this->upgradeRow();
 581                                         $this->upgraded = true;
 582                                 }
 583                         }
 584                 }
 585         }
 586
 587         function getUpgraded() {
 588                 return $this->upgraded;
 589         }
 590
 591         /**
 592          * Fix assorted version-related problems with the image row by reloading it from the file
 593          */
 594         function upgradeRow() {
 595
 596                 $this->lock(); // begin
 597
 598                 $this->loadFromFile();
 599
 600                 # Don't destroy file info of missing files
 601                 if ( !$this->fileExists ) {
 602                         $this->unlock();
 603                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 604
 605                         return;
 606                 }
 607
 608                 $dbw = $this->repo->getMasterDB();
 609                 list( $major, $minor ) = self::splitMime( $this->mime );
 610
 611                 if ( wfReadOnly() ) {
 612                         $this->unlock();
 613
 614                         return;
 615                 }
 616                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 617
 618                 $dbw->update( 'image',
 619                         array(
 620                                 'img_size' => $this->size, // sanity
 621                                 'img_width' => $this->width,
 622                                 'img_height' => $this->height,
 623                                 'img_bits' => $this->bits,
 624                                 'img_media_type' => $this->media_type,
 625                                 'img_major_mime' => $major,
 626                                 'img_minor_mime' => $minor,
 627                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
 628                                 'img_sha1' => $this->sha1,
 629                         ),
 630                         array( 'img_name' => $this->getName() ),
 631                         __METHOD__
 632                 );
 633
 634                 $this->invalidateCache();
 635
 636                 $this->unlock(); // done
 637
 638         }
 639
 640         /**
 641          * Set properties in this object to be equal to those given in the
 642          * associative array $info. Only cacheable fields can be set.
 643          * All fields *must* be set in $info except for getLazyCacheFields().
 644          *
 645          * If 'mime' is given, it will be split into major_mime/minor_mime.
 646          * If major_mime/minor_mime are given, $this->mime will also be set.
 647          *
 648          * @param array $info
 649          */
 650         function setProps( $info ) {
 651                 $this->dataLoaded = true;
 652                 $fields = $this->getCacheFields( '' );
 653                 $fields[] = 'fileExists';
 654
 655                 foreach ( $fields as $field ) {
 656                         if ( isset( $info[$field] ) ) {
 657                                 $this->$field = $info[$field];
 658                         }
 659                 }
 660
 661                 // Fix up mime fields
 662                 if ( isset( $info['major_mime'] ) ) {
 663                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 664                 } elseif ( isset( $info['mime'] ) ) {
 665                         $this->mime = $info['mime'];
 666                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 667                 }
 668         }
 669
 670         /** splitMime inherited */
 671         /** getName inherited */
 672         /** getTitle inherited */
 673         /** getURL inherited */
 674         /** getViewURL inherited */
 675         /** getPath inherited */
 676         /** isVisible inherited */
 677
 678         /**
 679          * @return bool
 680          */
 681         function isMissing() {
 682                 if ( $this->missing === null ) {
 683                         list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl() );
 684                         $this->missing = !$fileExists;
 685                 }
 686
 687                 return $this->missing;
 688         }
 689
 690         /**
 691          * Return the width of the image
 692          *
 693          * @param int $page
 694          * @return int
 695          */
 696         public function getWidth( $page = 1 ) {
 697                 $this->load();
 698
 699                 if ( $this->isMultipage() ) {
 700                         $handler = $this->getHandler();
 701                         if ( !$handler ) {
 702                                 return 0;
 703                         }
 704                         $dim = $handler->getPageDimensions( $this, $page );
 705                         if ( $dim ) {
 706                                 return $dim['width'];
 707                         } else {
 708                                 // For non-paged media, the false goes through an
 709                                 // intval, turning failure into 0, so do same here.
 710                                 return 0;
 711                         }
 712                 } else {
 713                         return $this->width;
 714                 }
 715         }
 716
 717         /**
 718          * Return the height of the image
 719          *
 720          * @param int $page
 721          * @return int
 722          */
 723         public function getHeight( $page = 1 ) {
 724                 $this->load();
 725
 726                 if ( $this->isMultipage() ) {
 727                         $handler = $this->getHandler();
 728                         if ( !$handler ) {
 729                                 return 0;
 730                         }
 731                         $dim = $handler->getPageDimensions( $this, $page );
 732                         if ( $dim ) {
 733                                 return $dim['height'];
 734                         } else {
 735                                 // For non-paged media, the false goes through an
 736                                 // intval, turning failure into 0, so do same here.
 737                                 return 0;
 738                         }
 739                 } else {
 740                         return $this->height;
 741                 }
 742         }
 743
 744         /**
 745          * Returns ID or name of user who uploaded the file
 746          *
 747          * @param string $type 'text' or 'id'
 748          * @return int|string
 749          */
 750         function getUser( $type = 'text' ) {
 751                 $this->load();
 752
 753                 if ( $type == 'text' ) {
 754                         return $this->user_text;
 755                 } elseif ( $type == 'id' ) {
 756                         return (int)$this->user;
 757                 }
 758         }
 759
 760         /**
 761          * Get short description URL for a file based on the page ID.
 762          *
 763          * @return string|null
 764          * @throws MWException
 765          * @since 1.27
 766          */
 767         public function getDescriptionShortUrl() {
 768                 $pageId = $this->title->getArticleID();
 769
 770                 if ( $pageId !== null ) {
 771                         $url = $this->repo->makeUrl( array( 'curid' => $pageId ) );
 772                         if ( $url !== false ) {
 773                                 return $url;
 774                         }
 775                 }
 776                 return null;
 777         }
 778
 779         /**
 780          * Get handler-specific metadata
 781          * @return string
 782          */
 783         function getMetadata() {
 784                 $this->load( self::LOAD_ALL ); // large metadata is loaded in another step
 785                 return $this->metadata;
 786         }
 787
 788         /**
 789          * @return int
 790          */
 791         function getBitDepth() {
 792                 $this->load();
 793
 794                 return (int)$this->bits;
 795         }
 796
 797         /**
 798          * Returns the size of the image file, in bytes
 799          * @return int
 800          */
 801         public function getSize() {
 802                 $this->load();
 803
 804                 return $this->size;
 805         }
 806
 807         /**
 808          * Returns the MIME type of the file.
 809          * @return string
 810          */
 811         function getMimeType() {
 812                 $this->load();
 813
 814                 return $this->mime;
 815         }
 816
 817         /**
 818          * Returns the type of the media in the file.
 819          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 820          * @return string
 821          */
 822         function getMediaType() {
 823                 $this->load();
 824
 825                 return $this->media_type;
 826         }
 827
 828         /** canRender inherited */
 829         /** mustRender inherited */
 830         /** allowInlineDisplay inherited */
 831         /** isSafeFile inherited */
 832         /** isTrustedFile inherited */
 833
 834         /**
 835          * Returns true if the file exists on disk.
 836          * @return bool Whether file exist on disk.
 837          */
 838         public function exists() {
 839                 $this->load();
 840
 841                 return $this->fileExists;
 842         }
 843
 844         /** getTransformScript inherited */
 845         /** getUnscaledThumb inherited */
 846         /** thumbName inherited */
 847         /** createThumb inherited */
 848         /** transform inherited */
 849
 850         /** getHandler inherited */
 851         /** iconThumb inherited */
 852         /** getLastError inherited */
 853
 854         /**
 855          * Get all thumbnail names previously generated for this file
 856          * @param string|bool $archiveName Name of an archive file, default false
 857          * @return array First element is the base dir, then files in that base dir.
 858          */
 859         function getThumbnails( $archiveName = false ) {
 860                 if ( $archiveName ) {
 861                         $dir = $this->getArchiveThumbPath( $archiveName );
 862                 } else {
 863                         $dir = $this->getThumbPath();
 864                 }
 865
 866                 $backend = $this->repo->getBackend();
 867                 $files = array( $dir );
 868                 try {
 869                         $iterator = $backend->getFileList( array( 'dir' => $dir ) );
 870                         foreach ( $iterator as $file ) {
 871                                 $files[] = $file;
 872                         }
 873                 } catch ( FileBackendError $e ) {
 874                 } // suppress (bug 54674)
 875
 876                 return $files;
 877         }
 878
 879         /**
 880          * Refresh metadata in memcached, but don't touch thumbnails or CDN
 881          */
 882         function purgeMetadataCache() {
 883                 $this->invalidateCache();
 884         }
 885
 886         /**
 887          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the CDN.
 888          *
 889          * @param array $options An array potentially with the key forThumbRefresh.
 890          *
 891          * @note This used to purge old thumbnails by default as well, but doesn't anymore.
 892          */
 893         function purgeCache( $options = array() ) {
 894                 // Refresh metadata cache
 895                 $this->purgeMetadataCache();
 896
 897                 // Delete thumbnails
 898                 $this->purgeThumbnails( $options );
 899
 900                 // Purge CDN cache for this file
 901                 DeferredUpdates::addUpdate(
 902                         new CdnCacheUpdate( array( $this->getUrl() ) ),
 903                         DeferredUpdates::PRESEND
 904                 );
 905         }
 906
 907         /**
 908          * Delete cached transformed files for an archived version only.
 909          * @param string $archiveName Name of the archived file
 910          */
 911         function purgeOldThumbnails( $archiveName ) {
 912                 // Get a list of old thumbnails and URLs
 913                 $files = $this->getThumbnails( $archiveName );
 914
 915                 // Purge any custom thumbnail caches
 916                 Hooks::run( 'LocalFilePurgeThumbnails', array( $this, $archiveName ) );
 917
 918                 $dir = array_shift( $files );
 919                 $this->purgeThumbList( $dir, $files );
 920
 921                 // Purge the CDN
 922                 $urls = array();
 923                 foreach ( $files as $file ) {
 924                         $urls[] = $this->getArchiveThumbUrl( $archiveName, $file );
 925                 }
 926                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $urls ), DeferredUpdates::PRESEND );
 927         }
 928
 929         /**
 930          * Delete cached transformed files for the current version only.
 931          * @param array $options
 932          */
 933         public function purgeThumbnails( $options = array() ) {
 934                 // Delete thumbnails
 935                 $files = $this->getThumbnails();
 936                 // Always purge all files from CDN regardless of handler filters
 937                 $urls = array();
 938                 foreach ( $files as $file ) {
 939                         $urls[] = $this->getThumbUrl( $file );
 940                 }
 941                 array_shift( $urls ); // don't purge directory
 942
 943                 // Give media handler a chance to filter the file purge list
 944                 if ( !empty( $options['forThumbRefresh'] ) ) {
 945                         $handler = $this->getHandler();
 946                         if ( $handler ) {
 947                                 $handler->filterThumbnailPurgeList( $files, $options );
 948                         }
 949                 }
 950
 951                 // Purge any custom thumbnail caches
 952                 Hooks::run( 'LocalFilePurgeThumbnails', array( $this, false ) );
 953
 954                 $dir = array_shift( $files );
 955                 $this->purgeThumbList( $dir, $files );
 956
 957                 // Purge the CDN
 958                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $urls ), DeferredUpdates::PRESEND );
 959         }
 960
 961         /**
 962          * Delete a list of thumbnails visible at urls
 963          * @param string $dir Base dir of the files.
 964          * @param array $files Array of strings: relative filenames (to $dir)
 965          */
 966         protected function purgeThumbList( $dir, $files ) {
 967                 $fileListDebug = strtr(
 968                         var_export( $files, true ),
 969                         array( "\n" => '' )
 970                 );
 971                 wfDebug( __METHOD__ . ": $fileListDebug\n" );
 972
 973                 $purgeList = array();
 974                 foreach ( $files as $file ) {
 975                         # Check that the base file name is part of the thumb name
 976                         # This is a basic sanity check to avoid erasing unrelated directories
 977                         if ( strpos( $file, $this->getName() ) !== false
 978                                 || strpos( $file, "-thumbnail" ) !== false // "short" thumb name
 979                         ) {
 980                                 $purgeList[] = "{$dir}/{$file}";
 981                         }
 982                 }
 983
 984                 # Delete the thumbnails
 985                 $this->repo->quickPurgeBatch( $purgeList );
 986                 # Clear out the thumbnail directory if empty
 987                 $this->repo->quickCleanDir( $dir );
 988         }
 989
 990         /** purgeDescription inherited */
 991         /** purgeEverything inherited */
 992
 993         /**
 994          * @param int $limit Optional: Limit to number of results
 995          * @param int $start Optional: Timestamp, start from
 996          * @param int $end Optional: Timestamp, end at
 997          * @param bool $inc
 998          * @return OldLocalFile[]
 999          */
1000         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
1001                 $dbr = $this->repo->getSlaveDB();
1002                 $tables = array( 'oldimage' );
1003                 $fields = OldLocalFile::selectFields();
1004                 $conds = $opts = $join_conds = array();
1005                 $eq = $inc ? '=' : '';
1006                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
1007
1008                 if ( $start ) {
1009                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
1010                 }
1011
1012                 if ( $end ) {
1013                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
1014                 }
1015
1016                 if ( $limit ) {
1017                         $opts['LIMIT'] = $limit;
1018                 }
1019
1020                 // Search backwards for time > x queries
1021                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
1022                 $opts['ORDER BY'] = "oi_timestamp $order";
1023                 $opts['USE INDEX'] = array( 'oldimage' => 'oi_name_timestamp' );
1024
1025                 Hooks::run( 'LocalFile::getHistory', array( &$this, &$tables, &$fields,
1026                         &$conds, &$opts, &$join_conds ) );
1027
1028                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
1029                 $r = array();
1030
1031                 foreach ( $res as $row ) {
1032                         $r[] = $this->repo->newFileFromRow( $row );
1033                 }
1034
1035                 if ( $order == 'ASC' ) {
1036                         $r = array_reverse( $r ); // make sure it ends up descending
1037                 }
1038
1039                 return $r;
1040         }
1041
1042         /**
1043          * Returns the history of this file, line by line.
1044          * starts with current version, then old versions.
1045          * uses $this->historyLine to check which line to return:
1046          *  0      return line for current version
1047          *  1      query for old versions, return first one
1048          *  2, ... return next old version from above query
1049          * @return bool
1050          */
1051         public function nextHistoryLine() {
1052                 # Polymorphic function name to distinguish foreign and local fetches
1053                 $fname = get_class( $this ) . '::' . __FUNCTION__;
1054
1055                 $dbr = $this->repo->getSlaveDB();
1056
1057                 if ( $this->historyLine == 0 ) { // called for the first time, return line from cur
1058                         $this->historyRes = $dbr->select( 'image',
1059                                 array(
1060                                         '*',
1061                                         "'' AS oi_archive_name",
1062                                         '0 as oi_deleted',
1063                                         'img_sha1'
1064                                 ),
1065                                 array( 'img_name' => $this->title->getDBkey() ),
1066                                 $fname
1067                         );
1068
1069                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
1070                                 $this->historyRes = null;
1071
1072                                 return false;
1073                         }
1074                 } elseif ( $this->historyLine == 1 ) {
1075                         $this->historyRes = $dbr->select( 'oldimage', '*',
1076                                 array( 'oi_name' => $this->title->getDBkey() ),
1077                                 $fname,
1078                                 array( 'ORDER BY' => 'oi_timestamp DESC' )
1079                         );
1080                 }
1081                 $this->historyLine++;
1082
1083                 return $dbr->fetchObject( $this->historyRes );
1084         }
1085
1086         /**
1087          * Reset the history pointer to the first element of the history
1088          */
1089         public function resetHistory() {
1090                 $this->historyLine = 0;
1091
1092                 if ( !is_null( $this->historyRes ) ) {
1093                         $this->historyRes = null;
1094                 }
1095         }
1096
1097         /** getHashPath inherited */
1098         /** getRel inherited */
1099         /** getUrlRel inherited */
1100         /** getArchiveRel inherited */
1101         /** getArchivePath inherited */
1102         /** getThumbPath inherited */
1103         /** getArchiveUrl inherited */
1104         /** getThumbUrl inherited */
1105         /** getArchiveVirtualUrl inherited */
1106         /** getThumbVirtualUrl inherited */
1107         /** isHashed inherited */
1108
1109         /**
1110          * Upload a file and record it in the DB
1111          * @param string $srcPath Source storage path, virtual URL, or filesystem path
1112          * @param string $comment Upload description
1113          * @param string $pageText Text to use for the new description page,
1114          *   if a new description page is created
1115          * @param int|bool $flags Flags for publish()
1116          * @param array|bool $props File properties, if known. This can be used to
1117          *   reduce the upload time when uploading virtual URLs for which the file
1118          *   info is already known
1119          * @param string|bool $timestamp Timestamp for img_timestamp, or false to use the
1120          *   current time
1121          * @param User|null $user User object or null to use $wgUser
1122          *
1123          * @return FileRepoStatus On success, the value member contains the
1124          *     archive name, or an empty string if it was a new file.
1125          */
1126         function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false,
1127                 $timestamp = false, $user = null
1128         ) {
1129                 global $wgContLang;
1130
1131                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1132                         return $this->readOnlyFatalStatus();
1133                 }
1134
1135                 if ( !$props ) {
1136                         if ( $this->repo->isVirtualUrl( $srcPath )
1137                                 || FileBackend::isStoragePath( $srcPath )
1138                         ) {
1139                                 $props = $this->repo->getFileProps( $srcPath );
1140                         } else {
1141                                 $props = FSFile::getPropsFromPath( $srcPath );
1142                         }
1143                 }
1144
1145                 $options = array();
1146                 $handler = MediaHandler::getHandler( $props['mime'] );
1147                 if ( $handler ) {
1148                         $options['headers'] = $handler->getStreamHeaders( $props['metadata'] );
1149                 } else {
1150                         $options['headers'] = array();
1151                 }
1152
1153                 // Trim spaces on user supplied text
1154                 $comment = trim( $comment );
1155
1156                 // Truncate nicely or the DB will do it for us
1157                 // non-nicely (dangling multi-byte chars, non-truncated version in cache).
1158                 $comment = $wgContLang->truncate( $comment, 255 );
1159                 $this->lock(); // begin
1160                 $status = $this->publish( $srcPath, $flags, $options );
1161
1162                 if ( $status->successCount >= 2 ) {
1163                         // There will be a copy+(one of move,copy,store).
1164                         // The first succeeding does not commit us to updating the DB
1165                         // since it simply copied the current version to a timestamped file name.
1166                         // It is only *preferable* to avoid leaving such files orphaned.
1167                         // Once the second operation goes through, then the current version was
1168                         // updated and we must therefore update the DB too.
1169                         if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp, $user ) ) {
1170                                 $status->fatal( 'filenotfound', $srcPath );
1171                         }
1172                 }
1173
1174                 $this->unlock(); // done
1175
1176                 return $status;
1177         }
1178
1179         /**
1180          * Record a file upload in the upload log and the image table
1181          * @param string $oldver
1182          * @param string $desc
1183          * @param string $license
1184          * @param string $copyStatus
1185          * @param string $source
1186          * @param bool $watch
1187          * @param string|bool $timestamp
1188          * @param User|null $user User object or null to use $wgUser
1189          * @return bool
1190          */
1191         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
1192                 $watch = false, $timestamp = false, User $user = null ) {
1193                 if ( !$user ) {
1194                         global $wgUser;
1195                         $user = $wgUser;
1196                 }
1197
1198                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
1199
1200                 if ( !$this->recordUpload2( $oldver, $desc, $pageText, false, $timestamp, $user ) ) {
1201                         return false;
1202                 }
1203
1204                 if ( $watch ) {
1205                         $user->addWatch( $this->getTitle() );
1206                 }
1207
1208                 return true;
1209         }
1210
1211         /**
1212          * Record a file upload in the upload log and the image table
1213          * @param string $oldver
1214          * @param string $comment
1215          * @param string $pageText
1216          * @param bool|array $props
1217          * @param string|bool $timestamp
1218          * @param null|User $user
1219          * @return bool
1220          */
1221         function recordUpload2(
1222                 $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null
1223         ) {
1224                 if ( is_null( $user ) ) {
1225                         global $wgUser;
1226                         $user = $wgUser;
1227                 }
1228
1229                 $dbw = $this->repo->getMasterDB();
1230
1231                 # Imports or such might force a certain timestamp; otherwise we generate
1232                 # it and can fudge it slightly to keep (name,timestamp) unique on re-upload.
1233                 if ( $timestamp === false ) {
1234                         $timestamp = $dbw->timestamp();
1235                         $allowTimeKludge = true;
1236                 } else {
1237                         $allowTimeKludge = false;
1238                 }
1239
1240                 $props = $props ?: $this->repo->getFileProps( $this->getVirtualUrl() );
1241                 $props['description'] = $comment;
1242                 $props['user'] = $user->getId();
1243                 $props['user_text'] = $user->getName();
1244                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1245                 $this->setProps( $props );
1246
1247                 # Fail now if the file isn't there
1248                 if ( !$this->fileExists ) {
1249                         wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
1250
1251                         return false;
1252                 }
1253
1254                 $dbw->startAtomic( __METHOD__ );
1255
1256                 # Test to see if the row exists using INSERT IGNORE
1257                 # This avoids race conditions by locking the row until the commit, and also
1258                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
1259                 $dbw->insert( 'image',
1260                         array(
1261                                 'img_name' => $this->getName(),
1262                                 'img_size' => $this->size,
1263                                 'img_width' => intval( $this->width ),
1264                                 'img_height' => intval( $this->height ),
1265                                 'img_bits' => $this->bits,
1266                                 'img_media_type' => $this->media_type,
1267                                 'img_major_mime' => $this->major_mime,
1268                                 'img_minor_mime' => $this->minor_mime,
1269                                 'img_timestamp' => $timestamp,
1270                                 'img_description' => $comment,
1271                                 'img_user' => $user->getId(),
1272                                 'img_user_text' => $user->getName(),
1273                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1274                                 'img_sha1' => $this->sha1
1275                         ),
1276                         __METHOD__,
1277                         'IGNORE'
1278                 );
1279
1280                 $reupload = ( $dbw->affectedRows() == 0 );
1281                 if ( $reupload ) {
1282                         if ( $allowTimeKludge ) {
1283                                 # Use LOCK IN SHARE MODE to ignore any transaction snapshotting
1284                                 $ltimestamp = $dbw->selectField(
1285                                         'image',
1286                                         'img_timestamp',
1287                                         array( 'img_name' => $this->getName() ),
1288                                         __METHOD__,
1289                                         array( 'LOCK IN SHARE MODE' )
1290                                 );
1291                                 $lUnixtime = $ltimestamp ? wfTimestamp( TS_UNIX, $ltimestamp ) : false;
1292                                 # Avoid a timestamp that is not newer than the last version
1293                                 # TODO: the image/oldimage tables should be like page/revision with an ID field
1294                                 if ( $lUnixtime && wfTimestamp( TS_UNIX, $timestamp ) <= $lUnixtime ) {
1295                                         sleep( 1 ); // fast enough re-uploads would go far in the future otherwise
1296                                         $timestamp = $dbw->timestamp( $lUnixtime + 1 );
1297                                         $this->timestamp = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1298                                 }
1299                         }
1300
1301                         # (bug 34993) Note: $oldver can be empty here, if the previous
1302                         # version of the file was broken. Allow registration of the new
1303                         # version to continue anyway, because that's better than having
1304                         # an image that's not fixable by user operations.
1305                         # Collision, this is an update of a file
1306                         # Insert previous contents into oldimage
1307                         $dbw->insertSelect( 'oldimage', 'image',
1308                                 array(
1309                                         'oi_name' => 'img_name',
1310                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1311                                         'oi_size' => 'img_size',
1312                                         'oi_width' => 'img_width',
1313                                         'oi_height' => 'img_height',
1314                                         'oi_bits' => 'img_bits',
1315                                         'oi_timestamp' => 'img_timestamp',
1316                                         'oi_description' => 'img_description',
1317                                         'oi_user' => 'img_user',
1318                                         'oi_user_text' => 'img_user_text',
1319                                         'oi_metadata' => 'img_metadata',
1320                                         'oi_media_type' => 'img_media_type',
1321                                         'oi_major_mime' => 'img_major_mime',
1322                                         'oi_minor_mime' => 'img_minor_mime',
1323                                         'oi_sha1' => 'img_sha1'
1324                                 ),
1325                                 array( 'img_name' => $this->getName() ),
1326                                 __METHOD__
1327                         );
1328
1329                         # Update the current image row
1330                         $dbw->update( 'image',
1331                                 array(
1332                                         'img_size' => $this->size,
1333                                         'img_width' => intval( $this->width ),
1334                                         'img_height' => intval( $this->height ),
1335                                         'img_bits' => $this->bits,
1336                                         'img_media_type' => $this->media_type,
1337                                         'img_major_mime' => $this->major_mime,
1338                                         'img_minor_mime' => $this->minor_mime,
1339                                         'img_timestamp' => $timestamp,
1340                                         'img_description' => $comment,
1341                                         'img_user' => $user->getId(),
1342                                         'img_user_text' => $user->getName(),
1343                                         'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1344                                         'img_sha1' => $this->sha1
1345                                 ),
1346                                 array( 'img_name' => $this->getName() ),
1347                                 __METHOD__
1348                         );
1349                 }
1350
1351                 $descTitle = $this->getTitle();
1352                 $descId = $descTitle->getArticleID();
1353                 $wikiPage = new WikiFilePage( $descTitle );
1354                 $wikiPage->setFile( $this );
1355
1356                 // Add the log entry...
1357                 $logEntry = new ManualLogEntry( 'upload', $reupload ? 'overwrite' : 'upload' );
1358                 $logEntry->setPerformer( $user );
1359                 $logEntry->setComment( $comment );
1360                 $logEntry->setTarget( $descTitle );
1361                 // Allow people using the api to associate log entries with the upload.
1362                 // Log has a timestamp, but sometimes different from upload timestamp.
1363                 $logEntry->setParameters(
1364                         array(
1365                                 'img_sha1' => $this->sha1,
1366                                 'img_timestamp' => $timestamp,
1367                         )
1368                 );
1369                 // Note we keep $logId around since during new image
1370                 // creation, page doesn't exist yet, so log_page = 0
1371                 // but we want it to point to the page we're making,
1372                 // so we later modify the log entry.
1373                 // For a similar reason, we avoid making an RC entry
1374                 // now and wait until the page exists.
1375                 $logId = $logEntry->insert();
1376
1377                 if ( $descTitle->exists() ) {
1378                         // Use own context to get the action text in content language
1379                         $formatter = LogFormatter::newFromEntry( $logEntry );
1380                         $formatter->setContext( RequestContext::newExtraneousContext( $descTitle ) );
1381                         $editSummary = $formatter->getPlainActionText();
1382
1383                         $nullRevision = Revision::newNullRevision(
1384                                 $dbw,
1385                                 $descId,
1386                                 $editSummary,
1387                                 false,
1388                                 $user
1389                         );
1390                         if ( $nullRevision ) {
1391                                 $nullRevision->insertOn( $dbw );
1392                                 Hooks::run(
1393                                         'NewRevisionFromEditComplete',
1394                                         array( $wikiPage, $nullRevision, $nullRevision->getParentId(), $user )
1395                                 );
1396                                 $wikiPage->updateRevisionOn( $dbw, $nullRevision );
1397                                 // Associate null revision id
1398                                 $logEntry->setAssociatedRevId( $nullRevision->getId() );
1399                         }
1400
1401                         $newPageContent = null;
1402                 } else {
1403                         // Make the description page and RC log entry post-commit
1404                         $newPageContent = ContentHandler::makeContent( $pageText, $descTitle );
1405                 }
1406
1407                 # Defer purges, page creation, and link updates in case they error out.
1408                 # The most important thing is that files and the DB registry stay synced.
1409                 $dbw->endAtomic( __METHOD__ );
1410
1411                 # Do some cache purges after final commit so that:
1412                 # a) Changes are more likely to be seen post-purge
1413                 # b) They won't cause rollback of the log publish/update above
1414                 $that = $this;
1415                 $dbw->onTransactionIdle( function () use (
1416                         $that, $reupload, $wikiPage, $newPageContent, $comment, $user, $logEntry, $logId, $descId
1417                 ) {
1418                         # Update memcache after the commit
1419                         $that->invalidateCache();
1420
1421                         $updateLogPage = false;
1422                         if ( $newPageContent ) {
1423                                 # New file page; create the description page.
1424                                 # There's already a log entry, so don't make a second RC entry
1425                                 # CDN and file cache for the description page are purged by doEditContent.
1426                                 $status = $wikiPage->doEditContent(
1427                                         $newPageContent,
1428                                         $comment,
1429                                         EDIT_NEW | EDIT_SUPPRESS_RC,
1430                                         false,
1431                                         $user
1432                                 );
1433
1434                                 if ( isset( $status->value['revision'] ) ) {
1435                                         // Associate new page revision id
1436                                         $logEntry->setAssociatedRevId( $status->value['revision']->getId() );
1437                                 }
1438                                 // This relies on the resetArticleID() call in WikiPage::insertOn(),
1439                                 // which is triggered on $descTitle by doEditContent() above.
1440                                 if ( isset( $status->value['revision'] ) ) {
1441                                         /** @var $rev Revision */
1442                                         $rev = $status->value['revision'];
1443                                         $updateLogPage = $rev->getPage();
1444                                 }
1445                         } else {
1446                                 # Existing file page: invalidate description page cache
1447                                 $wikiPage->getTitle()->invalidateCache();
1448                                 $wikiPage->getTitle()->purgeSquid();
1449                                 # Allow the new file version to be patrolled from the page footer
1450                                 Article::purgePatrolFooterCache( $descId );
1451                         }
1452
1453                         # Update associated rev id. This should be done by $logEntry->insert() earlier,
1454                         # but setAssociatedRevId() wasn't called at that point yet...
1455                         $logParams = $logEntry->getParameters();
1456                         $logParams['associated_rev_id'] = $logEntry->getAssociatedRevId();
1457                         $update = array( 'log_params' => LogEntryBase::makeParamBlob( $logParams ) );
1458                         if ( $updateLogPage ) {
1459                                 # Also log page, in case where we just created it above
1460                                 $update['log_page'] = $updateLogPage;
1461                         }
1462                         $that->getRepo()->getMasterDB()->update(
1463                                 'logging',
1464                                 $update,
1465                                 array( 'log_id' => $logId ),
1466                                 __METHOD__
1467                         );
1468                         $that->getRepo()->getMasterDB()->insert(
1469                                 'log_search',
1470                                 array(
1471                                         'ls_field' => 'associated_rev_id',
1472                                         'ls_value' => $logEntry->getAssociatedRevId(),
1473                                         'ls_log_id' => $logId,
1474                                 ),
1475                                 __METHOD__
1476                         );
1477
1478                         # Now that the log entry is up-to-date, make an RC entry.
1479                         $logEntry->publish( $logId );
1480                         # Run hook for other updates (typically more cache purging)
1481                         Hooks::run( 'FileUpload', array( $that, $reupload, !$newPageContent ) );
1482
1483                         if ( $reupload ) {
1484                                 # Delete old thumbnails
1485                                 $that->purgeThumbnails();
1486                                 # Remove the old file from the CDN cache
1487                                 DeferredUpdates::addUpdate(
1488                                         new CdnCacheUpdate( array( $that->getUrl() ) ),
1489                                         DeferredUpdates::PRESEND
1490                                 );
1491                         } else {
1492                                 # Update backlink pages pointing to this title if created
1493                                 LinksUpdate::queueRecursiveJobsForTable( $that->getTitle(), 'imagelinks' );
1494                         }
1495                 } );
1496
1497                 if ( !$reupload ) {
1498                         # This is a new file, so update the image count
1499                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
1500                 }
1501
1502                 # Invalidate cache for all pages using this file
1503                 DeferredUpdates::addUpdate( new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' ) );
1504
1505                 return true;
1506         }
1507
1508         /**
1509          * Move or copy a file to its public location. If a file exists at the
1510          * destination, move it to an archive. Returns a FileRepoStatus object with
1511          * the archive name in the "value" member on success.
1512          *
1513          * The archive name should be passed through to recordUpload for database
1514          * registration.
1515          *
1516          * @param string $srcPath Local filesystem path or virtual URL to the source image
1517          * @param int $flags A bitwise combination of:
1518          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1519          * @param array $options Optional additional parameters
1520          * @return FileRepoStatus On success, the value member contains the
1521          *     archive name, or an empty string if it was a new file.
1522          */
1523         function publish( $srcPath, $flags = 0, array $options = array() ) {
1524                 return $this->publishTo( $srcPath, $this->getRel(), $flags, $options );
1525         }
1526
1527         /**
1528          * Move or copy a file to a specified location. Returns a FileRepoStatus
1529          * object with the archive name in the "value" member on success.
1530          *
1531          * The archive name should be passed through to recordUpload for database
1532          * registration.
1533          *
1534          * @param string $srcPath Local filesystem path or virtual URL to the source image
1535          * @param string $dstRel Target relative path
1536          * @param int $flags A bitwise combination of:
1537          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1538          * @param array $options Optional additional parameters
1539          * @return FileRepoStatus On success, the value member contains the
1540          *     archive name, or an empty string if it was a new file.
1541          */
1542         function publishTo( $srcPath, $dstRel, $flags = 0, array $options = array() ) {
1543                 $repo = $this->getRepo();
1544                 if ( $repo->getReadOnlyReason() !== false ) {
1545                         return $this->readOnlyFatalStatus();
1546                 }
1547
1548                 $this->lock(); // begin
1549
1550                 $archiveName = wfTimestamp( TS_MW ) . '!' . $this->getName();
1551                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1552
1553                 if ( $repo->hasSha1Storage() ) {
1554                         $sha1 = $repo->isVirtualUrl( $srcPath )
1555                                 ? $repo->getFileSha1( $srcPath )
1556                                 : File::sha1Base36( $srcPath );
1557                         $dst = $repo->getBackend()->getPathForSHA1( $sha1 );
1558                         $status = $repo->quickImport( $srcPath, $dst );
1559                         if ( $flags & File::DELETE_SOURCE ) {
1560                                 unlink( $srcPath );
1561                         }
1562
1563                         if ( $this->exists() ) {
1564                                 $status->value = $archiveName;
1565                         }
1566                 } else {
1567                         $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1568                         $status = $repo->publish( $srcPath, $dstRel, $archiveRel, $flags, $options );
1569
1570                         if ( $status->value == 'new' ) {
1571                                 $status->value = '';
1572                         } else {
1573                                 $status->value = $archiveName;
1574                         }
1575                 }
1576
1577                 $this->unlock(); // done
1578
1579                 return $status;
1580         }
1581
1582         /** getLinksTo inherited */
1583         /** getExifData inherited */
1584         /** isLocal inherited */
1585         /** wasDeleted inherited */
1586
1587         /**
1588          * Move file to the new title
1589          *
1590          * Move current, old version and all thumbnails
1591          * to the new filename. Old file is deleted.
1592          *
1593          * Cache purging is done; checks for validity
1594          * and logging are caller's responsibility
1595          *
1596          * @param Title $target New file name
1597          * @return FileRepoStatus
1598          */
1599         function move( $target ) {
1600                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1601                         return $this->readOnlyFatalStatus();
1602                 }
1603
1604                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1605                 $batch = new LocalFileMoveBatch( $this, $target );
1606
1607                 $this->lock(); // begin
1608                 $batch->addCurrent();
1609                 $archiveNames = $batch->addOlds();
1610                 $status = $batch->execute();
1611                 $this->unlock(); // done
1612
1613                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1614
1615                 // Purge the source and target files...
1616                 $oldTitleFile = wfLocalFile( $this->title );
1617                 $newTitleFile = wfLocalFile( $target );
1618                 // Hack: the lock()/unlock() pair is nested in a transaction so the locking is not
1619                 // tied to BEGIN/COMMIT. To avoid slow purges in the transaction, move them outside.
1620                 $this->getRepo()->getMasterDB()->onTransactionIdle(
1621                         function () use ( $oldTitleFile, $newTitleFile, $archiveNames ) {
1622                                 $oldTitleFile->purgeEverything();
1623                                 foreach ( $archiveNames as $archiveName ) {
1624                                         $oldTitleFile->purgeOldThumbnails( $archiveName );
1625                                 }
1626                                 $newTitleFile->purgeEverything();
1627                         }
1628                 );
1629
1630                 if ( $status->isOK() ) {
1631                         // Now switch the object
1632                         $this->title = $target;
1633                         // Force regeneration of the name and hashpath
1634                         unset( $this->name );
1635                         unset( $this->hashPath );
1636                 }
1637
1638                 return $status;
1639         }
1640
1641         /**
1642          * Delete all versions of the file.
1643          *
1644          * Moves the files into an archive directory (or deletes them)
1645          * and removes the database rows.
1646          *
1647          * Cache purging is done; logging is caller's responsibility.
1648          *
1649          * @param string $reason
1650          * @param bool $suppress
1651          * @param User|null $user
1652          * @return FileRepoStatus
1653          */
1654         function delete( $reason, $suppress = false, $user = null ) {
1655                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1656                         return $this->readOnlyFatalStatus();
1657                 }
1658
1659                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress, $user );
1660
1661                 $this->lock(); // begin
1662                 $batch->addCurrent();
1663                 # Get old version relative paths
1664                 $archiveNames = $batch->addOlds();
1665                 $status = $batch->execute();
1666                 $this->unlock(); // done
1667
1668                 if ( $status->isOK() ) {
1669                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => -1 ) ) );
1670                 }
1671
1672                 // Hack: the lock()/unlock() pair is nested in a transaction so the locking is not
1673                 // tied to BEGIN/COMMIT. To avoid slow purges in the transaction, move them outside.
1674                 $that = $this;
1675                 $this->getRepo()->getMasterDB()->onTransactionIdle(
1676                         function () use ( $that, $archiveNames ) {
1677                                 $that->purgeEverything();
1678                                 foreach ( $archiveNames as $archiveName ) {
1679                                         $that->purgeOldThumbnails( $archiveName );
1680                                 }
1681                         }
1682                 );
1683
1684                 // Purge the CDN
1685                 $purgeUrls = array();
1686                 foreach ( $archiveNames as $archiveName ) {
1687                         $purgeUrls[] = $this->getArchiveUrl( $archiveName );
1688                 }
1689                 DeferredUpdates::addUpdate( new CdnCacheUpdate( $purgeUrls ), DeferredUpdates::PRESEND );
1690
1691                 return $status;
1692         }
1693
1694         /**
1695          * Delete an old version of the file.
1696          *
1697          * Moves the file into an archive directory (or deletes it)
1698          * and removes the database row.
1699          *
1700          * Cache purging is done; logging is caller's responsibility.
1701          *
1702          * @param string $archiveName
1703          * @param string $reason
1704          * @param bool $suppress
1705          * @param User|null $user
1706          * @throws MWException Exception on database or file store failure
1707          * @return FileRepoStatus
1708          */
1709         function deleteOld( $archiveName, $reason, $suppress = false, $user = null ) {
1710                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1711                         return $this->readOnlyFatalStatus();
1712                 }
1713
1714                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress, $user );
1715
1716                 $this->lock(); // begin
1717                 $batch->addOld( $archiveName );
1718                 $status = $batch->execute();
1719                 $this->unlock(); // done
1720
1721                 $this->purgeOldThumbnails( $archiveName );
1722                 if ( $status->isOK() ) {
1723                         $this->purgeDescription();
1724                 }
1725
1726                 DeferredUpdates::addUpdate(
1727                         new CdnCacheUpdate( array( $this->getArchiveUrl( $archiveName ) ) ),
1728                         DeferredUpdates::PRESEND
1729                 );
1730
1731                 return $status;
1732         }
1733
1734         /**
1735          * Restore all or specified deleted revisions to the given file.
1736          * Permissions and logging are left to the caller.
1737          *
1738          * May throw database exceptions on error.
1739          *
1740          * @param array $versions Set of record ids of deleted items to restore,
1741          *   or empty to restore all revisions.
1742          * @param bool $unsuppress
1743          * @return FileRepoStatus
1744          */
1745         function restore( $versions = array(), $unsuppress = false ) {
1746                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1747                         return $this->readOnlyFatalStatus();
1748                 }
1749
1750                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1751
1752                 $this->lock(); // begin
1753                 if ( !$versions ) {
1754                         $batch->addAll();
1755                 } else {
1756                         $batch->addIds( $versions );
1757                 }
1758                 $status = $batch->execute();
1759                 if ( $status->isGood() ) {
1760                         $cleanupStatus = $batch->cleanup();
1761                         $cleanupStatus->successCount = 0;
1762                         $cleanupStatus->failCount = 0;
1763                         $status->merge( $cleanupStatus );
1764                 }
1765                 $this->unlock(); // done
1766
1767                 return $status;
1768         }
1769
1770         /** isMultipage inherited */
1771         /** pageCount inherited */
1772         /** scaleHeight inherited */
1773         /** getImageSize inherited */
1774
1775         /**
1776          * Get the URL of the file description page.
1777          * @return string
1778          */
1779         function getDescriptionUrl() {
1780                 return $this->title->getLocalURL();
1781         }
1782
1783         /**
1784          * Get the HTML text of the description page
1785          * This is not used by ImagePage for local files, since (among other things)
1786          * it skips the parser cache.
1787          *
1788          * @param Language $lang What language to get description in (Optional)
1789          * @return bool|mixed
1790          */
1791         function getDescriptionText( $lang = null ) {
1792                 $revision = Revision::newFromTitle( $this->title, false, Revision::READ_NORMAL );
1793                 if ( !$revision ) {
1794                         return false;
1795                 }
1796                 $content = $revision->getContent();
1797                 if ( !$content ) {
1798                         return false;
1799                 }
1800                 $pout = $content->getParserOutput( $this->title, null, new ParserOptions( null, $lang ) );
1801
1802                 return $pout->getText();
1803         }
1804
1805         /**
1806          * @param int $audience
1807          * @param User $user
1808          * @return string
1809          */
1810         function getDescription( $audience = self::FOR_PUBLIC, User $user = null ) {
1811                 $this->load();
1812                 if ( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
1813                         return '';
1814                 } elseif ( $audience == self::FOR_THIS_USER
1815                         && !$this->userCan( self::DELETED_COMMENT, $user )
1816                 ) {
1817                         return '';
1818                 } else {
1819                         return $this->description;
1820                 }
1821         }
1822
1823         /**
1824          * @return bool|string
1825          */
1826         function getTimestamp() {
1827                 $this->load();
1828
1829                 return $this->timestamp;
1830         }
1831
1832         /**
1833          * @return bool|string
1834          */
1835         public function getDescriptionTouched() {
1836                 // The DB lookup might return false, e.g. if the file was just deleted, or the shared DB repo
1837                 // itself gets it from elsewhere. To avoid repeating the DB lookups in such a case, we
1838                 // need to differentiate between null (uninitialized) and false (failed to load).
1839                 if ( $this->descriptionTouched === null ) {
1840                         $cond = array(
1841                                 'page_namespace' => $this->title->getNamespace(),
1842                                 'page_title' => $this->title->getDBkey()
1843                         );
1844                         $touched = $this->repo->getSlaveDB()->selectField( 'page', 'page_touched', $cond, __METHOD__ );
1845                         $this->descriptionTouched = $touched ? wfTimestamp( TS_MW, $touched ) : false;
1846                 }
1847
1848                 return $this->descriptionTouched;
1849         }
1850
1851         /**
1852          * @return string
1853          */
1854         function getSha1() {
1855                 $this->load();
1856                 // Initialise now if necessary
1857                 if ( $this->sha1 == '' && $this->fileExists ) {
1858                         $this->lock(); // begin
1859
1860                         $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
1861                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1862                                 $dbw = $this->repo->getMasterDB();
1863                                 $dbw->update( 'image',
1864                                         array( 'img_sha1' => $this->sha1 ),
1865                                         array( 'img_name' => $this->getName() ),
1866                                         __METHOD__ );
1867                                 $this->invalidateCache();
1868                         }
1869
1870                         $this->unlock(); // done
1871                 }
1872
1873                 return $this->sha1;
1874         }
1875
1876         /**
1877          * @return bool Whether to cache in RepoGroup (this avoids OOMs)
1878          */
1879         function isCacheable() {
1880                 $this->load();
1881
1882                 // If extra data (metadata) was not loaded then it must have been large
1883                 return $this->extraDataLoaded
1884                 && strlen( serialize( $this->metadata ) ) <= self::CACHE_FIELD_MAX_LEN;
1885         }
1886
1887         /**
1888          * Start a transaction and lock the image for update
1889          * Increments a reference counter if the lock is already held
1890          * @throws MWException Throws an error if the lock was not acquired
1891          * @return bool Whether the file lock owns/spawned the DB transaction
1892          */
1893         function lock() {
1894                 $dbw = $this->repo->getMasterDB();
1895
1896                 if ( !$this->locked ) {
1897                         if ( !$dbw->trxLevel() ) {
1898                                 $dbw->begin( __METHOD__ );
1899                                 $this->lockedOwnTrx = true;
1900                         }
1901                         $this->locked++;
1902                         // Bug 54736: use simple lock to handle when the file does not exist.
1903                         // SELECT FOR UPDATE prevents changes, not other SELECTs with FOR UPDATE.
1904                         // Also, that would cause contention on INSERT of similarly named rows.
1905                         $backend = $this->getRepo()->getBackend();
1906                         $lockPaths = array( $this->getPath() ); // represents all versions of the file
1907                         $status = $backend->lockFiles( $lockPaths, LockManager::LOCK_EX, 5 );
1908                         if ( !$status->isGood() ) {
1909                                 throw new MWException( "Could not acquire lock for '{$this->getName()}.'" );
1910                         }
1911                         $dbw->onTransactionIdle( function () use ( $backend, $lockPaths ) {
1912                                 $backend->unlockFiles( $lockPaths, LockManager::LOCK_EX ); // release on commit
1913                         } );
1914                 }
1915
1916                 return $this->lockedOwnTrx;
1917         }
1918
1919         /**
1920          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1921          * the transaction and thereby releases the image lock.
1922          */
1923         function unlock() {
1924                 if ( $this->locked ) {
1925                         --$this->locked;
1926                         if ( !$this->locked && $this->lockedOwnTrx ) {
1927                                 $dbw = $this->repo->getMasterDB();
1928                                 $dbw->commit( __METHOD__ );
1929                                 $this->lockedOwnTrx = false;
1930                         }
1931                 }
1932         }
1933
1934         /**
1935          * Roll back the DB transaction and mark the image unlocked
1936          */
1937         function unlockAndRollback() {
1938                 $this->locked = false;
1939                 $dbw = $this->repo->getMasterDB();
1940                 $dbw->rollback( __METHOD__ );
1941                 $this->lockedOwnTrx = false;
1942         }
1943
1944         /**
1945          * @return Status
1946          */
1947         protected function readOnlyFatalStatus() {
1948                 return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
1949                         $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
1950         }
1951
1952         /**
1953          * Clean up any dangling locks
1954          */
1955         function __destruct() {
1956                 $this->unlock();
1957         }
1958 } // LocalFile class
1959
1960 # ------------------------------------------------------------------------------
1961
1962 /**
1963  * Helper class for file deletion
1964  * @ingroup FileAbstraction
1965  */
1966 class LocalFileDeleteBatch {
1967         /** @var LocalFile */
1968         private $file;
1969
1970         /** @var string */
1971         private $reason;
1972
1973         /** @var array */
1974         private $srcRels = array();
1975
1976         /** @var array */
1977         private $archiveUrls = array();
1978
1979         /** @var array Items to be processed in the deletion batch */
1980         private $deletionBatch;
1981
1982         /** @var bool Whether to suppress all suppressable fields when deleting */
1983         private $suppress;
1984
1985         /** @var FileRepoStatus */
1986         private $status;
1987
1988         /** @var User */
1989         private $user;
1990
1991         /**
1992          * @param File $file
1993          * @param string $reason
1994          * @param bool $suppress
1995          * @param User|null $user
1996          */
1997         function __construct( File $file, $reason = '', $suppress = false, $user = null ) {
1998                 $this->file = $file;
1999                 $this->reason = $reason;
2000                 $this->suppress = $suppress;
2001                 if ( $user ) {
2002                         $this->user = $user;
2003                 } else {
2004                         global $wgUser;
2005                         $this->user = $wgUser;
2006                 }
2007                 $this->status = $file->repo->newGood();
2008         }
2009
2010         public function addCurrent() {
2011                 $this->srcRels['.'] = $this->file->getRel();
2012         }
2013
2014         /**
2015          * @param string $oldName
2016          */
2017         public function addOld( $oldName ) {
2018                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
2019                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
2020         }
2021
2022         /**
2023          * Add the old versions of the image to the batch
2024          * @return array List of archive names from old versions
2025          */
2026         public function addOlds() {
2027                 $archiveNames = array();
2028
2029                 $dbw = $this->file->repo->getMasterDB();
2030                 $result = $dbw->select( 'oldimage',
2031                         array( 'oi_archive_name' ),
2032                         array( 'oi_name' => $this->file->getName() ),
2033                         __METHOD__
2034                 );
2035
2036                 foreach ( $result as $row ) {
2037                         $this->addOld( $row->oi_archive_name );
2038                         $archiveNames[] = $row->oi_archive_name;
2039                 }
2040
2041                 return $archiveNames;
2042         }
2043
2044         /**
2045          * @return array
2046          */
2047         protected function getOldRels() {
2048                 if ( !isset( $this->srcRels['.'] ) ) {
2049                         $oldRels =& $this->srcRels;
2050                         $deleteCurrent = false;
2051                 } else {
2052                         $oldRels = $this->srcRels;
2053                         unset( $oldRels['.'] );
2054                         $deleteCurrent = true;
2055                 }
2056
2057                 return array( $oldRels, $deleteCurrent );
2058         }
2059
2060         /**
2061          * @return array
2062          */
2063         protected function getHashes() {
2064                 $hashes = array();
2065                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2066
2067                 if ( $deleteCurrent ) {
2068                         $hashes['.'] = $this->file->getSha1();
2069                 }
2070
2071                 if ( count( $oldRels ) ) {
2072                         $dbw = $this->file->repo->getMasterDB();
2073                         $res = $dbw->select(
2074                                 'oldimage',
2075                                 array( 'oi_archive_name', 'oi_sha1' ),
2076                                 array( 'oi_archive_name' => array_keys( $oldRels ),
2077                                         'oi_name' => $this->file->getName() ), // performance
2078                                 __METHOD__
2079                         );
2080
2081                         foreach ( $res as $row ) {
2082                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
2083                                         // Get the hash from the file
2084                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
2085                                         $props = $this->file->repo->getFileProps( $oldUrl );
2086
2087                                         if ( $props['fileExists'] ) {
2088                                                 // Upgrade the oldimage row
2089                                                 $dbw->update( 'oldimage',
2090                                                         array( 'oi_sha1' => $props['sha1'] ),
2091                                                         array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ),
2092                                                         __METHOD__ );
2093                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
2094                                         } else {
2095                                                 $hashes[$row->oi_archive_name] = false;
2096                                         }
2097                                 } else {
2098                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
2099                                 }
2100                         }
2101                 }
2102
2103                 $missing = array_diff_key( $this->srcRels, $hashes );
2104
2105                 foreach ( $missing as $name => $rel ) {
2106                         $this->status->error( 'filedelete-old-unregistered', $name );
2107                 }
2108
2109                 foreach ( $hashes as $name => $hash ) {
2110                         if ( !$hash ) {
2111                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
2112                                 unset( $hashes[$name] );
2113                         }
2114                 }
2115
2116                 return $hashes;
2117         }
2118
2119         protected function doDBInserts() {
2120                 $dbw = $this->file->repo->getMasterDB();
2121                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
2122                 $encUserId = $dbw->addQuotes( $this->user->getId() );
2123                 $encReason = $dbw->addQuotes( $this->reason );
2124                 $encGroup = $dbw->addQuotes( 'deleted' );
2125                 $ext = $this->file->getExtension();
2126                 $dotExt = $ext === '' ? '' : ".$ext";
2127                 $encExt = $dbw->addQuotes( $dotExt );
2128                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2129
2130                 // Bitfields to further suppress the content
2131                 if ( $this->suppress ) {
2132                         $bitfield = 0;
2133                         // This should be 15...
2134                         $bitfield |= Revision::DELETED_TEXT;
2135                         $bitfield |= Revision::DELETED_COMMENT;
2136                         $bitfield |= Revision::DELETED_USER;
2137                         $bitfield |= Revision::DELETED_RESTRICTED;
2138                 } else {
2139                         $bitfield = 'oi_deleted';
2140                 }
2141
2142                 if ( $deleteCurrent ) {
2143                         $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) );
2144                         $where = array( 'img_name' => $this->file->getName() );
2145                         $dbw->insertSelect( 'filearchive', 'image',
2146                                 array(
2147                                         'fa_storage_group' => $encGroup,
2148                                         'fa_storage_key' => $dbw->conditional(
2149                                                 array( 'img_sha1' => '' ),
2150                                                 $dbw->addQuotes( '' ),
2151                                                 $concat
2152                                         ),
2153                                         'fa_deleted_user' => $encUserId,
2154                                         'fa_deleted_timestamp' => $encTimestamp,
2155                                         'fa_deleted_reason' => $encReason,
2156                                         'fa_deleted' => $this->suppress ? $bitfield : 0,
2157
2158                                         'fa_name' => 'img_name',
2159                                         'fa_archive_name' => 'NULL',
2160                                         'fa_size' => 'img_size',
2161                                         'fa_width' => 'img_width',
2162                                         'fa_height' => 'img_height',
2163                                         'fa_metadata' => 'img_metadata',
2164                                         'fa_bits' => 'img_bits',
2165                                         'fa_media_type' => 'img_media_type',
2166                                         'fa_major_mime' => 'img_major_mime',
2167                                         'fa_minor_mime' => 'img_minor_mime',
2168                                         'fa_description' => 'img_description',
2169                                         'fa_user' => 'img_user',
2170                                         'fa_user_text' => 'img_user_text',
2171                                         'fa_timestamp' => 'img_timestamp',
2172                                         'fa_sha1' => 'img_sha1',
2173                                 ), $where, __METHOD__ );
2174                 }
2175
2176                 if ( count( $oldRels ) ) {
2177                         $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) );
2178                         $where = array(
2179                                 'oi_name' => $this->file->getName(),
2180                                 'oi_archive_name' => array_keys( $oldRels ) );
2181                         $dbw->insertSelect( 'filearchive', 'oldimage',
2182                                 array(
2183                                         'fa_storage_group' => $encGroup,
2184                                         'fa_storage_key' => $dbw->conditional(
2185                                                 array( 'oi_sha1' => '' ),
2186                                                 $dbw->addQuotes( '' ),
2187                                                 $concat
2188                                         ),
2189                                         'fa_deleted_user' => $encUserId,
2190                                         'fa_deleted_timestamp' => $encTimestamp,
2191                                         'fa_deleted_reason' => $encReason,
2192                                         'fa_deleted' => $this->suppress ? $bitfield : 'oi_deleted',
2193
2194                                         'fa_name' => 'oi_name',
2195                                         'fa_archive_name' => 'oi_archive_name',
2196                                         'fa_size' => 'oi_size',
2197                                         'fa_width' => 'oi_width',
2198                                         'fa_height' => 'oi_height',
2199                                         'fa_metadata' => 'oi_metadata',
2200                                         'fa_bits' => 'oi_bits',
2201                                         'fa_media_type' => 'oi_media_type',
2202                                         'fa_major_mime' => 'oi_major_mime',
2203                                         'fa_minor_mime' => 'oi_minor_mime',
2204                                         'fa_description' => 'oi_description',
2205                                         'fa_user' => 'oi_user',
2206                                         'fa_user_text' => 'oi_user_text',
2207                                         'fa_timestamp' => 'oi_timestamp',
2208                                         'fa_sha1' => 'oi_sha1',
2209                                 ), $where, __METHOD__ );
2210                 }
2211         }
2212
2213         function doDBDeletes() {
2214                 $dbw = $this->file->repo->getMasterDB();
2215                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2216
2217                 if ( count( $oldRels ) ) {
2218                         $dbw->delete( 'oldimage',
2219                                 array(
2220                                         'oi_name' => $this->file->getName(),
2221                                         'oi_archive_name' => array_keys( $oldRels )
2222                                 ), __METHOD__ );
2223                 }
2224
2225                 if ( $deleteCurrent ) {
2226                         $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ );
2227                 }
2228         }
2229
2230         /**
2231          * Run the transaction
2232          * @return FileRepoStatus
2233          */
2234         public function execute() {
2235                 $repo = $this->file->getRepo();
2236                 $this->file->lock();
2237
2238                 // Prepare deletion batch
2239                 $hashes = $this->getHashes();
2240                 $this->deletionBatch = array();
2241                 $ext = $this->file->getExtension();
2242                 $dotExt = $ext === '' ? '' : ".$ext";
2243
2244                 foreach ( $this->srcRels as $name => $srcRel ) {
2245                         // Skip files that have no hash (e.g. missing DB record, or sha1 field and file source)
2246                         if ( isset( $hashes[$name] ) ) {
2247                                 $hash = $hashes[$name];
2248                                 $key = $hash . $dotExt;
2249                                 $dstRel = $repo->getDeletedHashPath( $key ) . $key;
2250                                 $this->deletionBatch[$name] = array( $srcRel, $dstRel );
2251                         }
2252                 }
2253
2254                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
2255                 // We acquire this lock by running the inserts now, before the file operations.
2256                 // This potentially has poor lock contention characteristics -- an alternative
2257                 // scheme would be to insert stub filearchive entries with no fa_name and commit
2258                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
2259                 $this->doDBInserts();
2260
2261                 if ( !$repo->hasSha1Storage() ) {
2262                         // Removes non-existent file from the batch, so we don't get errors.
2263                         // This also handles files in the 'deleted' zone deleted via revision deletion.
2264                         $checkStatus = $this->removeNonexistentFiles( $this->deletionBatch );
2265                         if ( !$checkStatus->isGood() ) {
2266                                 $this->status->merge( $checkStatus );
2267                                 return $this->status;
2268                         }
2269                         $this->deletionBatch = $checkStatus->value;
2270
2271                         // Execute the file deletion batch
2272                         $status = $this->file->repo->deleteBatch( $this->deletionBatch );
2273
2274                         if ( !$status->isGood() ) {
2275                                 $this->status->merge( $status );
2276                         }
2277                 }
2278
2279                 if ( !$this->status->isOK() ) {
2280                         // Critical file deletion error
2281                         // Roll back inserts, release lock and abort
2282                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
2283                         $this->file->unlockAndRollback();
2284
2285                         return $this->status;
2286                 }
2287
2288                 // Delete image/oldimage rows
2289                 $this->doDBDeletes();
2290
2291                 // Commit and return
2292                 $this->file->unlock();
2293
2294                 return $this->status;
2295         }
2296
2297         /**
2298          * Removes non-existent files from a deletion batch.
2299          * @param array $batch
2300          * @return Status
2301          */
2302         protected function removeNonexistentFiles( $batch ) {
2303                 $files = $newBatch = array();
2304
2305                 foreach ( $batch as $batchItem ) {
2306                         list( $src, ) = $batchItem;
2307                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
2308                 }
2309
2310                 $result = $this->file->repo->fileExistsBatch( $files );
2311                 if ( in_array( null, $result, true ) ) {
2312                         return Status::newFatal( 'backend-fail-internal',
2313                                 $this->file->repo->getBackend()->getName() );
2314                 }
2315
2316                 foreach ( $batch as $batchItem ) {
2317                         if ( $result[$batchItem[0]] ) {
2318                                 $newBatch[] = $batchItem;
2319                         }
2320                 }
2321
2322                 return Status::newGood( $newBatch );
2323         }
2324 }
2325
2326 # ------------------------------------------------------------------------------
2327
2328 /**
2329  * Helper class for file undeletion
2330  * @ingroup FileAbstraction
2331  */
2332 class LocalFileRestoreBatch {
2333         /** @var LocalFile */
2334         private $file;
2335
2336         /** @var array List of file IDs to restore */
2337         private $cleanupBatch;
2338
2339         /** @var array List of file IDs to restore */
2340         private $ids;
2341
2342         /** @var bool Add all revisions of the file */
2343         private $all;
2344
2345         /** @var bool Whether to remove all settings for suppressed fields */
2346         private $unsuppress = false;
2347
2348         /**
2349          * @param File $file
2350          * @param bool $unsuppress
2351          */
2352         function __construct( File $file, $unsuppress = false ) {
2353                 $this->file = $file;
2354                 $this->cleanupBatch = $this->ids = array();
2355                 $this->ids = array();
2356                 $this->unsuppress = $unsuppress;
2357         }
2358
2359         /**
2360          * Add a file by ID
2361          * @param int $fa_id
2362          */
2363         public function addId( $fa_id ) {
2364                 $this->ids[] = $fa_id;
2365         }
2366
2367         /**
2368          * Add a whole lot of files by ID
2369          * @param int[] $ids
2370          */
2371         public function addIds( $ids ) {
2372                 $this->ids = array_merge( $this->ids, $ids );
2373         }
2374
2375         /**
2376          * Add all revisions of the file
2377          */
2378         public function addAll() {
2379                 $this->all = true;
2380         }
2381
2382         /**
2383          * Run the transaction, except the cleanup batch.
2384          * The cleanup batch should be run in a separate transaction, because it locks different
2385          * rows and there's no need to keep the image row locked while it's acquiring those locks
2386          * The caller may have its own transaction open.
2387          * So we save the batch and let the caller call cleanup()
2388          * @return FileRepoStatus
2389          */
2390         public function execute() {
2391                 global $wgLang;
2392
2393                 $repo = $this->file->getRepo();
2394                 if ( !$this->all && !$this->ids ) {
2395                         // Do nothing
2396                         return $repo->newGood();
2397                 }
2398
2399                 $lockOwnsTrx = $this->file->lock();
2400
2401                 $dbw = $this->file->repo->getMasterDB();
2402                 $status = $this->file->repo->newGood();
2403
2404                 $exists = (bool)$dbw->selectField( 'image', '1',
2405                         array( 'img_name' => $this->file->getName() ),
2406                         __METHOD__,
2407                         // The lock() should already prevents changes, but this still may need
2408                         // to bypass any transaction snapshot. However, if lock() started the
2409                         // trx (which it probably did) then snapshot is post-lock and up-to-date.
2410                         $lockOwnsTrx ? array() : array( 'LOCK IN SHARE MODE' )
2411                 );
2412
2413                 // Fetch all or selected archived revisions for the file,
2414                 // sorted from the most recent to the oldest.
2415                 $conditions = array( 'fa_name' => $this->file->getName() );
2416
2417                 if ( !$this->all ) {
2418                         $conditions['fa_id'] = $this->ids;
2419                 }
2420
2421                 $result = $dbw->select(
2422                         'filearchive',
2423                         ArchivedFile::selectFields(),
2424                         $conditions,
2425                         __METHOD__,
2426                         array( 'ORDER BY' => 'fa_timestamp DESC' )
2427                 );
2428
2429                 $idsPresent = array();
2430                 $storeBatch = array();
2431                 $insertBatch = array();
2432                 $insertCurrent = false;
2433                 $deleteIds = array();
2434                 $first = true;
2435                 $archiveNames = array();
2436
2437                 foreach ( $result as $row ) {
2438                         $idsPresent[] = $row->fa_id;
2439
2440                         if ( $row->fa_name != $this->file->getName() ) {
2441                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
2442                                 $status->failCount++;
2443                                 continue;
2444                         }
2445
2446                         if ( $row->fa_storage_key == '' ) {
2447                                 // Revision was missing pre-deletion
2448                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
2449                                 $status->failCount++;
2450                                 continue;
2451                         }
2452
2453                         $deletedRel = $repo->getDeletedHashPath( $row->fa_storage_key ) .
2454                                 $row->fa_storage_key;
2455                         $deletedUrl = $repo->getVirtualUrl() . '/deleted/' . $deletedRel;
2456
2457                         if ( isset( $row->fa_sha1 ) ) {
2458                                 $sha1 = $row->fa_sha1;
2459                         } else {
2460                                 // old row, populate from key
2461                                 $sha1 = LocalRepo::getHashFromKey( $row->fa_storage_key );
2462                         }
2463
2464                         # Fix leading zero
2465                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
2466                                 $sha1 = substr( $sha1, 1 );
2467                         }
2468
2469                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
2470                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
2471                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
2472                                 || is_null( $row->fa_metadata )
2473                         ) {
2474                                 // Refresh our metadata
2475                                 // Required for a new current revision; nice for older ones too. :)
2476                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
2477                         } else {
2478                                 $props = array(
2479                                         'minor_mime' => $row->fa_minor_mime,
2480                                         'major_mime' => $row->fa_major_mime,
2481                                         'media_type' => $row->fa_media_type,
2482                                         'metadata' => $row->fa_metadata
2483                                 );
2484                         }
2485
2486                         if ( $first && !$exists ) {
2487                                 // This revision will be published as the new current version
2488                                 $destRel = $this->file->getRel();
2489                                 $insertCurrent = array(
2490                                         'img_name' => $row->fa_name,
2491                                         'img_size' => $row->fa_size,
2492                                         'img_width' => $row->fa_width,
2493                                         'img_height' => $row->fa_height,
2494                                         'img_metadata' => $props['metadata'],
2495                                         'img_bits' => $row->fa_bits,
2496                                         'img_media_type' => $props['media_type'],
2497                                         'img_major_mime' => $props['major_mime'],
2498                                         'img_minor_mime' => $props['minor_mime'],
2499                                         'img_description' => $row->fa_description,
2500                                         'img_user' => $row->fa_user,
2501                                         'img_user_text' => $row->fa_user_text,
2502                                         'img_timestamp' => $row->fa_timestamp,
2503                                         'img_sha1' => $sha1
2504                                 );
2505
2506                                 // The live (current) version cannot be hidden!
2507                                 if ( !$this->unsuppress && $row->fa_deleted ) {
2508                                         $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2509                                         $this->cleanupBatch[] = $row->fa_storage_key;
2510                                 }
2511                         } else {
2512                                 $archiveName = $row->fa_archive_name;
2513
2514                                 if ( $archiveName == '' ) {
2515                                         // This was originally a current version; we
2516                                         // have to devise a new archive name for it.
2517                                         // Format is <timestamp of archiving>!<name>
2518                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
2519
2520                                         do {
2521                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
2522                                                 $timestamp++;
2523                                         } while ( isset( $archiveNames[$archiveName] ) );
2524                                 }
2525
2526                                 $archiveNames[$archiveName] = true;
2527                                 $destRel = $this->file->getArchiveRel( $archiveName );
2528                                 $insertBatch[] = array(
2529                                         'oi_name' => $row->fa_name,
2530                                         'oi_archive_name' => $archiveName,
2531                                         'oi_size' => $row->fa_size,
2532                                         'oi_width' => $row->fa_width,
2533                                         'oi_height' => $row->fa_height,
2534                                         'oi_bits' => $row->fa_bits,
2535                                         'oi_description' => $row->fa_description,
2536                                         'oi_user' => $row->fa_user,
2537                                         'oi_user_text' => $row->fa_user_text,
2538                                         'oi_timestamp' => $row->fa_timestamp,
2539                                         'oi_metadata' => $props['metadata'],
2540                                         'oi_media_type' => $props['media_type'],
2541                                         'oi_major_mime' => $props['major_mime'],
2542                                         'oi_minor_mime' => $props['minor_mime'],
2543                                         'oi_deleted' => $this->unsuppress ? 0 : $row->fa_deleted,
2544                                         'oi_sha1' => $sha1 );
2545                         }
2546
2547                         $deleteIds[] = $row->fa_id;
2548
2549                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
2550                                 // private files can stay where they are
2551                                 $status->successCount++;
2552                         } else {
2553                                 $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2554                                 $this->cleanupBatch[] = $row->fa_storage_key;
2555                         }
2556
2557                         $first = false;
2558                 }
2559
2560                 unset( $result );
2561
2562                 // Add a warning to the status object for missing IDs
2563                 $missingIds = array_diff( $this->ids, $idsPresent );
2564
2565                 foreach ( $missingIds as $id ) {
2566                         $status->error( 'undelete-missing-filearchive', $id );
2567                 }
2568
2569                 if ( !$repo->hasSha1Storage() ) {
2570                         // Remove missing files from batch, so we don't get errors when undeleting them
2571                         $checkStatus = $this->removeNonexistentFiles( $storeBatch );
2572                         if ( !$checkStatus->isGood() ) {
2573                                 $status->merge( $checkStatus );
2574                                 return $status;
2575                         }
2576                         $storeBatch = $checkStatus->value;
2577
2578                         // Run the store batch
2579                         // Use the OVERWRITE_SAME flag to smooth over a common error
2580                         $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
2581                         $status->merge( $storeStatus );
2582
2583                         if ( !$status->isGood() ) {
2584                                 // Even if some files could be copied, fail entirely as that is the
2585                                 // easiest thing to do without data loss
2586                                 $this->cleanupFailedBatch( $storeStatus, $storeBatch );
2587                                 $status->ok = false;
2588                                 $this->file->unlock();
2589
2590                                 return $status;
2591                         }
2592                 }
2593
2594                 // Run the DB updates
2595                 // Because we have locked the image row, key conflicts should be rare.
2596                 // If they do occur, we can roll back the transaction at this time with
2597                 // no data loss, but leaving unregistered files scattered throughout the
2598                 // public zone.
2599                 // This is not ideal, which is why it's important to lock the image row.
2600                 if ( $insertCurrent ) {
2601                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
2602                 }
2603
2604                 if ( $insertBatch ) {
2605                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
2606                 }
2607
2608                 if ( $deleteIds ) {
2609                         $dbw->delete( 'filearchive',
2610                                 array( 'fa_id' => $deleteIds ),
2611                                 __METHOD__ );
2612                 }
2613
2614                 // If store batch is empty (all files are missing), deletion is to be considered successful
2615                 if ( $status->successCount > 0 || !$storeBatch || $repo->hasSha1Storage() ) {
2616                         if ( !$exists ) {
2617                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
2618
2619                                 DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
2620
2621                                 $this->file->purgeEverything();
2622                         } else {
2623                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
2624                                 $this->file->purgeDescription();
2625                         }
2626                 }
2627
2628                 $this->file->unlock();
2629
2630                 return $status;
2631         }
2632
2633         /**
2634          * Removes non-existent files from a store batch.
2635          * @param array $triplets
2636          * @return Status
2637          */
2638         protected function removeNonexistentFiles( $triplets ) {
2639                 $files = $filteredTriplets = array();
2640                 foreach ( $triplets as $file ) {
2641                         $files[$file[0]] = $file[0];
2642                 }
2643
2644                 $result = $this->file->repo->fileExistsBatch( $files );
2645                 if ( in_array( null, $result, true ) ) {
2646                         return Status::newFatal( 'backend-fail-internal',
2647                                 $this->file->repo->getBackend()->getName() );
2648                 }
2649
2650                 foreach ( $triplets as $file ) {
2651                         if ( $result[$file[0]] ) {
2652                                 $filteredTriplets[] = $file;
2653                         }
2654                 }
2655
2656                 return Status::newGood( $filteredTriplets );
2657         }
2658
2659         /**
2660          * Removes non-existent files from a cleanup batch.
2661          * @param array $batch
2662          * @return array
2663          */
2664         protected function removeNonexistentFromCleanup( $batch ) {
2665                 $files = $newBatch = array();
2666                 $repo = $this->file->repo;
2667
2668                 foreach ( $batch as $file ) {
2669                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
2670                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
2671                 }
2672
2673                 $result = $repo->fileExistsBatch( $files );
2674
2675                 foreach ( $batch as $file ) {
2676                         if ( $result[$file] ) {
2677                                 $newBatch[] = $file;
2678                         }
2679                 }
2680
2681                 return $newBatch;
2682         }
2683
2684         /**
2685          * Delete unused files in the deleted zone.
2686          * This should be called from outside the transaction in which execute() was called.
2687          * @return FileRepoStatus
2688          */
2689         public function cleanup() {
2690                 if ( !$this->cleanupBatch ) {
2691                         return $this->file->repo->newGood();
2692                 }
2693
2694                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
2695
2696                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
2697
2698                 return $status;
2699         }
2700
2701         /**
2702          * Cleanup a failed batch. The batch was only partially successful, so
2703          * rollback by removing all items that were succesfully copied.
2704          *
2705          * @param Status $storeStatus
2706          * @param array $storeBatch
2707          */
2708         protected function cleanupFailedBatch( $storeStatus, $storeBatch ) {
2709                 $cleanupBatch = array();
2710
2711                 foreach ( $storeStatus->success as $i => $success ) {
2712                         // Check if this item of the batch was successfully copied
2713                         if ( $success ) {
2714                                 // Item was successfully copied and needs to be removed again
2715                                 // Extract ($dstZone, $dstRel) from the batch
2716                                 $cleanupBatch[] = array( $storeBatch[$i][1], $storeBatch[$i][2] );
2717                         }
2718                 }
2719                 $this->file->repo->cleanupBatch( $cleanupBatch );
2720         }
2721 }
2722
2723 # ------------------------------------------------------------------------------
2724
2725 /**
2726  * Helper class for file movement
2727  * @ingroup FileAbstraction
2728  */
2729 class LocalFileMoveBatch {
2730         /** @var LocalFile */
2731         protected $file;
2732
2733         /** @var Title */
2734         protected $target;
2735
2736         protected $cur;
2737
2738         protected $olds;
2739
2740         protected $oldCount;
2741
2742         protected $archive;
2743
2744         /** @var DatabaseBase */
2745         protected $db;
2746
2747         /**
2748          * @param File $file
2749          * @param Title $target
2750          */
2751         function __construct( File $file, Title $target ) {
2752                 $this->file = $file;
2753                 $this->target = $target;
2754                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
2755                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
2756                 $this->oldName = $this->file->getName();
2757                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2758                 $this->oldRel = $this->oldHash . $this->oldName;
2759                 $this->newRel = $this->newHash . $this->newName;
2760                 $this->db = $file->getRepo()->getMasterDb();
2761         }
2762
2763         /**
2764          * Add the current image to the batch
2765          */
2766         public function addCurrent() {
2767                 $this->cur = array( $this->oldRel, $this->newRel );
2768         }
2769
2770         /**
2771          * Add the old versions of the image to the batch
2772          * @return array List of archive names from old versions
2773          */
2774         public function addOlds() {
2775                 $archiveBase = 'archive';
2776                 $this->olds = array();
2777                 $this->oldCount = 0;
2778                 $archiveNames = array();
2779
2780                 $result = $this->db->select( 'oldimage',
2781                         array( 'oi_archive_name', 'oi_deleted' ),
2782                         array( 'oi_name' => $this->oldName ),
2783                         __METHOD__,
2784                         array( 'LOCK IN SHARE MODE' ) // ignore snapshot
2785                 );
2786
2787                 foreach ( $result as $row ) {
2788                         $archiveNames[] = $row->oi_archive_name;
2789                         $oldName = $row->oi_archive_name;
2790                         $bits = explode( '!', $oldName, 2 );
2791
2792                         if ( count( $bits ) != 2 ) {
2793                                 wfDebug( "Old file name missing !: '$oldName' \n" );
2794                                 continue;
2795                         }
2796
2797                         list( $timestamp, $filename ) = $bits;
2798
2799                         if ( $this->oldName != $filename ) {
2800                                 wfDebug( "Old file name doesn't match: '$oldName' \n" );
2801                                 continue;
2802                         }
2803
2804                         $this->oldCount++;
2805
2806                         // Do we want to add those to oldCount?
2807                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2808                                 continue;
2809                         }
2810
2811                         $this->olds[] = array(
2812                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2813                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2814                         );
2815                 }
2816
2817                 return $archiveNames;
2818         }
2819
2820         /**
2821          * Perform the move.
2822          * @return FileRepoStatus
2823          */
2824         public function execute() {
2825                 $repo = $this->file->repo;
2826                 $status = $repo->newGood();
2827
2828                 $triplets = $this->getMoveTriplets();
2829                 $checkStatus = $this->removeNonexistentFiles( $triplets );
2830                 if ( !$checkStatus->isGood() ) {
2831                         $status->merge( $checkStatus );
2832                         return $status;
2833                 }
2834                 $triplets = $checkStatus->value;
2835                 $destFile = wfLocalFile( $this->target );
2836
2837                 $this->file->lock(); // begin
2838                 $destFile->lock(); // quickly fail if destination is not available
2839                 // Rename the file versions metadata in the DB.
2840                 // This implicitly locks the destination file, which avoids race conditions.
2841                 // If we moved the files from A -> C before DB updates, another process could
2842                 // move files from B -> C at this point, causing storeBatch() to fail and thus
2843                 // cleanupTarget() to trigger. It would delete the C files and cause data loss.
2844                 $statusDb = $this->doDBUpdates();
2845                 if ( !$statusDb->isGood() ) {
2846                         $destFile->unlock();
2847                         $this->file->unlockAndRollback();
2848                         $statusDb->ok = false;
2849
2850                         return $statusDb;
2851                 }
2852                 wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: " .
2853                         "{$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2854
2855                 if ( !$repo->hasSha1Storage() ) {
2856                         // Copy the files into their new location.
2857                         // If a prior process fataled copying or cleaning up files we tolerate any
2858                         // of the existing files if they are identical to the ones being stored.
2859                         $statusMove = $repo->storeBatch( $triplets, FileRepo::OVERWRITE_SAME );
2860                         wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: " .
2861                                 "{$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2862                         if ( !$statusMove->isGood() ) {
2863                                 // Delete any files copied over (while the destination is still locked)
2864                                 $this->cleanupTarget( $triplets );
2865                                 $destFile->unlock();
2866                                 $this->file->unlockAndRollback(); // unlocks the destination
2867                                 wfDebugLog( 'imagemove', "Error in moving files: " . $statusMove->getWikiText() );
2868                                 $statusMove->ok = false;
2869
2870                                 return $statusMove;
2871                         }
2872                         $status->merge( $statusMove );
2873                 }
2874
2875                 $destFile->unlock();
2876                 $this->file->unlock(); // done
2877
2878                 // Everything went ok, remove the source files
2879                 $this->cleanupSource( $triplets );
2880
2881                 $status->merge( $statusDb );
2882
2883                 return $status;
2884         }
2885
2886         /**
2887          * Do the database updates and return a new FileRepoStatus indicating how
2888          * many rows where updated.
2889          *
2890          * @return FileRepoStatus
2891          */
2892         protected function doDBUpdates() {
2893                 $repo = $this->file->repo;
2894                 $status = $repo->newGood();
2895                 $dbw = $this->db;
2896
2897                 // Update current image
2898                 $dbw->update(
2899                         'image',
2900                         array( 'img_name' => $this->newName ),
2901                         array( 'img_name' => $this->oldName ),
2902                         __METHOD__
2903                 );
2904
2905                 if ( $dbw->affectedRows() ) {
2906                         $status->successCount++;
2907                 } else {
2908                         $status->failCount++;
2909                         $status->fatal( 'imageinvalidfilename' );
2910
2911                         return $status;
2912                 }
2913
2914                 // Update old images
2915                 $dbw->update(
2916                         'oldimage',
2917                         array(
2918                                 'oi_name' => $this->newName,
2919                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name',
2920                                         $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2921                         ),
2922                         array( 'oi_name' => $this->oldName ),
2923                         __METHOD__
2924                 );
2925
2926                 $affected = $dbw->affectedRows();
2927                 $total = $this->oldCount;
2928                 $status->successCount += $affected;
2929                 // Bug 34934: $total is based on files that actually exist.
2930                 // There may be more DB rows than such files, in which case $affected
2931                 // can be greater than $total. We use max() to avoid negatives here.
2932                 $status->failCount += max( 0, $total - $affected );
2933                 if ( $status->failCount ) {
2934                         $status->error( 'imageinvalidfilename' );
2935                 }
2936
2937                 return $status;
2938         }
2939
2940         /**
2941          * Generate triplets for FileRepo::storeBatch().
2942          * @return array
2943          */
2944         protected function getMoveTriplets() {
2945                 $moves = array_merge( array( $this->cur ), $this->olds );
2946                 $triplets = array(); // The format is: (srcUrl, destZone, destUrl)
2947
2948                 foreach ( $moves as $move ) {
2949                         // $move: (oldRelativePath, newRelativePath)
2950                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2951                         $triplets[] = array( $srcUrl, 'public', $move[1] );
2952                         wfDebugLog(
2953                                 'imagemove',
2954                                 "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}"
2955                         );
2956                 }
2957
2958                 return $triplets;
2959         }
2960
2961         /**
2962          * Removes non-existent files from move batch.
2963          * @param array $triplets
2964          * @return Status
2965          */
2966         protected function removeNonexistentFiles( $triplets ) {
2967                 $files = array();
2968
2969                 foreach ( $triplets as $file ) {
2970                         $files[$file[0]] = $file[0];
2971                 }
2972
2973                 $result = $this->file->repo->fileExistsBatch( $files );
2974                 if ( in_array( null, $result, true ) ) {
2975                         return Status::newFatal( 'backend-fail-internal',
2976                                 $this->file->repo->getBackend()->getName() );
2977                 }
2978
2979                 $filteredTriplets = array();
2980                 foreach ( $triplets as $file ) {
2981                         if ( $result[$file[0]] ) {
2982                                 $filteredTriplets[] = $file;
2983                         } else {
2984                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
2985                         }
2986                 }
2987
2988                 return Status::newGood( $filteredTriplets );
2989         }
2990
2991         /**
2992          * Cleanup a partially moved array of triplets by deleting the target
2993          * files. Called if something went wrong half way.
2994          * @param array $triplets
2995          */
2996         protected function cleanupTarget( $triplets ) {
2997                 // Create dest pairs from the triplets
2998                 $pairs = array();
2999                 foreach ( $triplets as $triplet ) {
3000                         // $triplet: (old source virtual URL, dst zone, dest rel)
3001                         $pairs[] = array( $triplet[1], $triplet[2] );
3002                 }
3003
3004                 $this->file->repo->cleanupBatch( $pairs );
3005         }
3006
3007         /**
3008          * Cleanup a fully moved array of triplets by deleting the source files.
3009          * Called at the end of the move process if everything else went ok.
3010          * @param array $triplets
3011          */
3012         protected function cleanupSource( $triplets ) {
3013                 // Create source file names from the triplets
3014                 $files = array();
3015                 foreach ( $triplets as $triplet ) {
3016                         $files[] = $triplet[0];
3017                 }
3018
3019                 $this->file->repo->cleanupBatch( $files );
3020         }
3021 }