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         /**#@+
  50          * @private
  51          */
  52         var
  53                 $fileExists,       # does the file exist on disk? (loadFromXxx)
  54                 $historyLine,      # Number of line to return by nextHistoryLine() (constructor)
  55                 $historyRes,       # result of the query for the file's history (nextHistoryLine)
  56                 $width,            # \
  57                 $height,           #  |
  58                 $bits,             #   --- returned by getimagesize (loadFromXxx)
  59                 $attr,             # /
  60                 $media_type,       # MEDIATYPE_xxx (bitmap, drawing, audio...)
  61                 $mime,             # MIME type, determined by MimeMagic::guessMimeType
  62                 $major_mime,       # Major mime type
  63                 $minor_mime,       # Minor mime type
  64                 $size,             # Size in bytes (loadFromXxx)
  65                 $metadata,         # Handler-specific metadata
  66                 $timestamp,        # Upload timestamp
  67                 $sha1,             # SHA-1 base 36 content hash
  68                 $user, $user_text, # User, who uploaded the file
  69                 $description,      # Description of current revision of the file
  70                 $dataLoaded,       # Whether or not core data has been loaded from the database (loadFromXxx)
  71                 $extraDataLoaded,  # Whether or not lazy-loaded data has been loaded from the database
  72                 $upgraded,         # Whether the row was upgraded on load
  73                 $locked,           # True if the image row is locked
  74                 $lockedOwnTrx,     # True if the image row is locked with a lock initiated transaction
  75                 $missing,          # True if file is not present in file system. Not to be cached in memcached
  76                 $deleted;          # Bitfield akin to rev_deleted
  77
  78         /**#@-*/
  79
  80         /**
  81          * @var LocalRepo
  82          */
  83         var $repo;
  84
  85         protected $repoClass = 'LocalRepo';
  86
  87         const LOAD_ALL = 1; // integer; load all the lazy fields too (like metadata)
  88
  89         /**
  90          * Create a LocalFile from a title
  91          * Do not call this except from inside a repo class.
  92          *
  93          * Note: $unused param is only here to avoid an E_STRICT
  94          *
  95          * @param $title
  96          * @param $repo
  97          * @param $unused
  98          *
  99          * @return LocalFile
 100          */
 101         static function newFromTitle( $title, $repo, $unused = null ) {
 102                 return new self( $title, $repo );
 103         }
 104
 105         /**
 106          * Create a LocalFile from a title
 107          * Do not call this except from inside a repo class.
 108          *
 109          * @param $row
 110          * @param $repo
 111          *
 112          * @return LocalFile
 113          */
 114         static function newFromRow( $row, $repo ) {
 115                 $title = Title::makeTitle( NS_FILE, $row->img_name );
 116                 $file = new self( $title, $repo );
 117                 $file->loadFromRow( $row );
 118
 119                 return $file;
 120         }
 121
 122         /**
 123          * Create a LocalFile from a SHA-1 key
 124          * Do not call this except from inside a repo class.
 125          *
 126          * @param string $sha1 base-36 SHA-1
 127          * @param $repo LocalRepo
 128          * @param string|bool $timestamp MW_timestamp (optional)
 129          *
 130          * @return bool|LocalFile
 131          */
 132         static function newFromKey( $sha1, $repo, $timestamp = false ) {
 133                 $dbr = $repo->getSlaveDB();
 134
 135                 $conds = array( 'img_sha1' => $sha1 );
 136                 if ( $timestamp ) {
 137                         $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
 138                 }
 139
 140                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
 141                 if ( $row ) {
 142                         return self::newFromRow( $row, $repo );
 143                 } else {
 144                         return false;
 145                 }
 146         }
 147
 148         /**
 149          * Fields in the image table
 150          * @return array
 151          */
 152         static function selectFields() {
 153                 return array(
 154                         'img_name',
 155                         'img_size',
 156                         'img_width',
 157                         'img_height',
 158                         'img_metadata',
 159                         'img_bits',
 160                         'img_media_type',
 161                         'img_major_mime',
 162                         'img_minor_mime',
 163                         'img_description',
 164                         'img_user',
 165                         'img_user_text',
 166                         'img_timestamp',
 167                         'img_sha1',
 168                 );
 169         }
 170
 171         /**
 172          * Constructor.
 173          * Do not call this except from inside a repo class.
 174          */
 175         function __construct( $title, $repo ) {
 176                 parent::__construct( $title, $repo );
 177
 178                 $this->metadata = '';
 179                 $this->historyLine = 0;
 180                 $this->historyRes = null;
 181                 $this->dataLoaded = false;
 182                 $this->extraDataLoaded = false;
 183
 184                 $this->assertRepoDefined();
 185                 $this->assertTitleDefined();
 186         }
 187
 188         /**
 189          * Get the memcached key for the main data for this file, or false if
 190          * there is no access to the shared cache.
 191          * @return bool
 192          */
 193         function getCacheKey() {
 194                 $hashedName = md5( $this->getName() );
 195
 196                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 197         }
 198
 199         /**
 200          * Try to load file metadata from memcached. Returns true on success.
 201          * @return bool
 202          */
 203         function loadFromCache() {
 204                 global $wgMemc;
 205
 206                 wfProfileIn( __METHOD__ );
 207                 $this->dataLoaded = false;
 208                 $this->extraDataLoaded = false;
 209                 $key = $this->getCacheKey();
 210
 211                 if ( !$key ) {
 212                         wfProfileOut( __METHOD__ );
 213                         return false;
 214                 }
 215
 216                 $cachedValues = $wgMemc->get( $key );
 217
 218                 // Check if the key existed and belongs to this version of MediaWiki
 219                 if ( isset( $cachedValues['version'] ) && $cachedValues['version'] == MW_FILE_VERSION ) {
 220                         wfDebug( "Pulling file metadata from cache key $key\n" );
 221                         $this->fileExists = $cachedValues['fileExists'];
 222                         if ( $this->fileExists ) {
 223                                 $this->setProps( $cachedValues );
 224                         }
 225                         $this->dataLoaded = true;
 226                         $this->extraDataLoaded = true;
 227                         foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 228                                 $this->extraDataLoaded = $this->extraDataLoaded && isset( $cachedValues[$field] );
 229                         }
 230                 }
 231
 232                 if ( $this->dataLoaded ) {
 233                         wfIncrStats( 'image_cache_hit' );
 234                 } else {
 235                         wfIncrStats( 'image_cache_miss' );
 236                 }
 237
 238                 wfProfileOut( __METHOD__ );
 239                 return $this->dataLoaded;
 240         }
 241
 242         /**
 243          * Save the file metadata to memcached
 244          */
 245         function saveToCache() {
 246                 global $wgMemc;
 247
 248                 $this->load();
 249                 $key = $this->getCacheKey();
 250
 251                 if ( !$key ) {
 252                         return;
 253                 }
 254
 255                 $fields = $this->getCacheFields( '' );
 256                 $cache = array( 'version' => MW_FILE_VERSION );
 257                 $cache['fileExists'] = $this->fileExists;
 258
 259                 if ( $this->fileExists ) {
 260                         foreach ( $fields as $field ) {
 261                                 $cache[$field] = $this->$field;
 262                         }
 263                 }
 264
 265                 // Strip off excessive entries from the subset of fields that can become large.
 266                 // If the cache value gets to large it will not fit in memcached and nothing will
 267                 // get cached at all, causing master queries for any file access.
 268                 foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 269                         if ( isset( $cache[$field] ) && strlen( $cache[$field] ) > 100 * 1024 ) {
 270                                 unset( $cache[$field] ); // don't let the value get too big
 271                         }
 272                 }
 273
 274                 // Cache presence for 1 week and negatives for 1 day
 275                 $wgMemc->set( $key, $cache, $this->fileExists ? 86400 * 7 : 86400 );
 276         }
 277
 278         /**
 279          * Load metadata from the file itself
 280          */
 281         function loadFromFile() {
 282                 $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 283                 $this->setProps( $props );
 284         }
 285
 286         /**
 287          * @param $prefix string
 288          * @return array
 289          */
 290         function getCacheFields( $prefix = 'img_' ) {
 291                 static $fields = array( 'size', 'width', 'height', 'bits', 'media_type',
 292                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user', 'user_text', 'description' );
 293                 static $results = array();
 294
 295                 if ( $prefix == '' ) {
 296                         return $fields;
 297                 }
 298
 299                 if ( !isset( $results[$prefix] ) ) {
 300                         $prefixedFields = array();
 301                         foreach ( $fields as $field ) {
 302                                 $prefixedFields[] = $prefix . $field;
 303                         }
 304                         $results[$prefix] = $prefixedFields;
 305                 }
 306
 307                 return $results[$prefix];
 308         }
 309
 310         /**
 311          * @return array
 312          */
 313         function getLazyCacheFields( $prefix = 'img_' ) {
 314                 static $fields = array( 'metadata' );
 315                 static $results = array();
 316
 317                 if ( $prefix == '' ) {
 318                         return $fields;
 319                 }
 320
 321                 if ( !isset( $results[$prefix] ) ) {
 322                         $prefixedFields = array();
 323                         foreach ( $fields as $field ) {
 324                                 $prefixedFields[] = $prefix . $field;
 325                         }
 326                         $results[$prefix] = $prefixedFields;
 327                 }
 328
 329                 return $results[$prefix];
 330         }
 331
 332         /**
 333          * Load file metadata from the DB
 334          */
 335         function loadFromDB() {
 336                 # Polymorphic function name to distinguish foreign and local fetches
 337                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 338                 wfProfileIn( $fname );
 339
 340                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 341                 $this->dataLoaded = true;
 342                 $this->extraDataLoaded = true;
 343
 344                 $dbr = $this->repo->getMasterDB();
 345                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 346                         array( 'img_name' => $this->getName() ), $fname );
 347
 348                 if ( $row ) {
 349                         $this->loadFromRow( $row );
 350                 } else {
 351                         $this->fileExists = false;
 352                 }
 353
 354                 wfProfileOut( $fname );
 355         }
 356
 357         /**
 358          * Load lazy file metadata from the DB.
 359          * This covers fields that are sometimes not cached.
 360          */
 361         protected function loadExtraFromDB() {
 362                 # Polymorphic function name to distinguish foreign and local fetches
 363                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 364                 wfProfileIn( $fname );
 365
 366                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 367                 $this->extraDataLoaded = true;
 368
 369                 $dbr = $this->repo->getSlaveDB();
 370                 // In theory the file could have just been renamed/deleted...oh well
 371                 $row = $dbr->selectRow( 'image', $this->getLazyCacheFields( 'img_' ),
 372                         array( 'img_name' => $this->getName() ), $fname );
 373
 374                 if ( !$row ) { // fallback to master
 375                         $dbr = $this->repo->getMasterDB();
 376                         $row = $dbr->selectRow( 'image', $this->getLazyCacheFields( 'img_' ),
 377                                 array( 'img_name' => $this->getName() ), $fname );
 378                 }
 379
 380                 if ( $row ) {
 381                         foreach ( $this->unprefixRow( $row, 'img_' ) as $name => $value ) {
 382                                 $this->$name = $value;
 383                         }
 384                 } else {
 385                         wfProfileOut( $fname );
 386                         throw new MWException( "Could not find data for image '{$this->getName()}'." );
 387                 }
 388
 389                 wfProfileOut( $fname );
 390         }
 391
 392         /**
 393          * @param Row $row
 394          * @param $prefix string
 395          * @return Array
 396          */
 397         protected function unprefixRow( $row, $prefix = 'img_' ) {
 398                 $array = (array)$row;
 399                 $prefixLength = strlen( $prefix );
 400
 401                 // Sanity check prefix once
 402                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 403                         throw new MWException( __METHOD__ . ': incorrect $prefix parameter' );
 404                 }
 405
 406                 $decoded = array();
 407                 foreach ( $array as $name => $value ) {
 408                         $decoded[substr( $name, $prefixLength )] = $value;
 409                 }
 410                 return $decoded;
 411         }
 412
 413         /**
 414          * Decode a row from the database (either object or array) to an array
 415          * with timestamps and MIME types decoded, and the field prefix removed.
 416          * @param $row
 417          * @param $prefix string
 418          * @throws MWException
 419          * @return array
 420          */
 421         function decodeRow( $row, $prefix = 'img_' ) {
 422                 $decoded = $this->unprefixRow( $row, $prefix );
 423
 424                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 425
 426                 if ( empty( $decoded['major_mime'] ) ) {
 427                         $decoded['mime'] = 'unknown/unknown';
 428                 } else {
 429                         if ( !$decoded['minor_mime'] ) {
 430                                 $decoded['minor_mime'] = 'unknown';
 431                         }
 432                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 433                 }
 434
 435                 # Trim zero padding from char/binary field
 436                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 437
 438                 return $decoded;
 439         }
 440
 441         /**
 442          * Load file metadata from a DB result row
 443          */
 444         function loadFromRow( $row, $prefix = 'img_' ) {
 445                 $this->dataLoaded = true;
 446                 $this->extraDataLoaded = true;
 447
 448                 $array = $this->decodeRow( $row, $prefix );
 449
 450                 foreach ( $array as $name => $value ) {
 451                         $this->$name = $value;
 452                 }
 453
 454                 $this->fileExists = true;
 455                 $this->maybeUpgradeRow();
 456         }
 457
 458         /**
 459          * Load file metadata from cache or DB, unless already loaded
 460          * @param integer $flags
 461          */
 462         function load( $flags = 0 ) {
 463                 if ( !$this->dataLoaded ) {
 464                         if ( !$this->loadFromCache() ) {
 465                                 $this->loadFromDB();
 466                                 $this->saveToCache();
 467                         }
 468                         $this->dataLoaded = true;
 469                 }
 470                 if ( ( $flags & self::LOAD_ALL ) && !$this->extraDataLoaded ) {
 471                         $this->loadExtraFromDB();
 472                 }
 473         }
 474
 475         /**
 476          * Upgrade a row if it needs it
 477          */
 478         function maybeUpgradeRow() {
 479                 global $wgUpdateCompatibleMetadata;
 480                 if ( wfReadOnly() ) {
 481                         return;
 482                 }
 483
 484                 if ( is_null( $this->media_type ) ||
 485                         $this->mime == 'image/svg'
 486                 ) {
 487                         $this->upgradeRow();
 488                         $this->upgraded = true;
 489                 } else {
 490                         $handler = $this->getHandler();
 491                         if ( $handler ) {
 492                                 $validity = $handler->isMetadataValid( $this, $this->getMetadata() );
 493                                 if ( $validity === MediaHandler::METADATA_BAD
 494                                         || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata )
 495                                 ) {
 496                                         $this->upgradeRow();
 497                                         $this->upgraded = true;
 498                                 }
 499                         }
 500                 }
 501         }
 502
 503         function getUpgraded() {
 504                 return $this->upgraded;
 505         }
 506
 507         /**
 508          * Fix assorted version-related problems with the image row by reloading it from the file
 509          */
 510         function upgradeRow() {
 511                 wfProfileIn( __METHOD__ );
 512
 513                 $this->lock(); // begin
 514
 515                 $this->loadFromFile();
 516
 517                 # Don't destroy file info of missing files
 518                 if ( !$this->fileExists ) {
 519                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 520                         wfProfileOut( __METHOD__ );
 521                         return;
 522                 }
 523
 524                 $dbw = $this->repo->getMasterDB();
 525                 list( $major, $minor ) = self::splitMime( $this->mime );
 526
 527                 if ( wfReadOnly() ) {
 528                         wfProfileOut( __METHOD__ );
 529                         return;
 530                 }
 531                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 532
 533                 $dbw->update( 'image',
 534                         array(
 535                                 'img_size' => $this->size, // sanity
 536                                 'img_width' => $this->width,
 537                                 'img_height' => $this->height,
 538                                 'img_bits' => $this->bits,
 539                                 'img_media_type' => $this->media_type,
 540                                 'img_major_mime' => $major,
 541                                 'img_minor_mime' => $minor,
 542                                 'img_metadata' => $this->metadata,
 543                                 'img_sha1' => $this->sha1,
 544                         ),
 545                         array( 'img_name' => $this->getName() ),
 546                         __METHOD__
 547                 );
 548
 549                 $this->saveToCache();
 550
 551                 $this->unlock(); // done
 552
 553                 wfProfileOut( __METHOD__ );
 554         }
 555
 556         /**
 557          * Set properties in this object to be equal to those given in the
 558          * associative array $info. Only cacheable fields can be set.
 559          * All fields *must* be set in $info except for getLazyCacheFields().
 560          *
 561          * If 'mime' is given, it will be split into major_mime/minor_mime.
 562          * If major_mime/minor_mime are given, $this->mime will also be set.
 563          */
 564         function setProps( $info ) {
 565                 $this->dataLoaded = true;
 566                 $fields = $this->getCacheFields( '' );
 567                 $fields[] = 'fileExists';
 568
 569                 foreach ( $fields as $field ) {
 570                         if ( isset( $info[$field] ) ) {
 571                                 $this->$field = $info[$field];
 572                         }
 573                 }
 574
 575                 // Fix up mime fields
 576                 if ( isset( $info['major_mime'] ) ) {
 577                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 578                 } elseif ( isset( $info['mime'] ) ) {
 579                         $this->mime = $info['mime'];
 580                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 581                 }
 582         }
 583
 584         /** splitMime inherited */
 585         /** getName inherited */
 586         /** getTitle inherited */
 587         /** getURL inherited */
 588         /** getViewURL inherited */
 589         /** getPath inherited */
 590         /** isVisible inhereted */
 591
 592         /**
 593          * @return bool
 594          */
 595         function isMissing() {
 596                 if ( $this->missing === null ) {
 597                         list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl() );
 598                         $this->missing = !$fileExists;
 599                 }
 600                 return $this->missing;
 601         }
 602
 603         /**
 604          * Return the width of the image
 605          *
 606          * @param $page int
 607          * @return bool|int Returns false on error
 608          */
 609         public function getWidth( $page = 1 ) {
 610                 $this->load();
 611
 612                 if ( $this->isMultipage() ) {
 613                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 614                         if ( $dim ) {
 615                                 return $dim['width'];
 616                         } else {
 617                                 return false;
 618                         }
 619                 } else {
 620                         return $this->width;
 621                 }
 622         }
 623
 624         /**
 625          * Return the height of the image
 626          *
 627          * @param $page int
 628          * @return bool|int Returns false on error
 629          */
 630         public function getHeight( $page = 1 ) {
 631                 $this->load();
 632
 633                 if ( $this->isMultipage() ) {
 634                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 635                         if ( $dim ) {
 636                                 return $dim['height'];
 637                         } else {
 638                                 return false;
 639                         }
 640                 } else {
 641                         return $this->height;
 642                 }
 643         }
 644
 645         /**
 646          * Returns ID or name of user who uploaded the file
 647          *
 648          * @param string $type 'text' or 'id'
 649          * @return int|string
 650          */
 651         function getUser( $type = 'text' ) {
 652                 $this->load();
 653
 654                 if ( $type == 'text' ) {
 655                         return $this->user_text;
 656                 } elseif ( $type == 'id' ) {
 657                         return $this->user;
 658                 }
 659         }
 660
 661         /**
 662          * Get handler-specific metadata
 663          * @return string
 664          */
 665         function getMetadata() {
 666                 $this->load( self::LOAD_ALL ); // large metadata is loaded in another step
 667                 return $this->metadata;
 668         }
 669
 670         /**
 671          * @return int
 672          */
 673         function getBitDepth() {
 674                 $this->load();
 675                 return $this->bits;
 676         }
 677
 678         /**
 679          * Return the size of the image file, in bytes
 680          * @return int
 681          */
 682         public function getSize() {
 683                 $this->load();
 684                 return $this->size;
 685         }
 686
 687         /**
 688          * Returns the mime type of the file.
 689          * @return string
 690          */
 691         function getMimeType() {
 692                 $this->load();
 693                 return $this->mime;
 694         }
 695
 696         /**
 697          * Return the type of the media in the file.
 698          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 699          * @return string
 700          */
 701         function getMediaType() {
 702                 $this->load();
 703                 return $this->media_type;
 704         }
 705
 706         /** canRender inherited */
 707         /** mustRender inherited */
 708         /** allowInlineDisplay inherited */
 709         /** isSafeFile inherited */
 710         /** isTrustedFile inherited */
 711
 712         /**
 713          * Returns true if the file exists on disk.
 714          * @return boolean Whether file exist on disk.
 715          */
 716         public function exists() {
 717                 $this->load();
 718                 return $this->fileExists;
 719         }
 720
 721         /** getTransformScript inherited */
 722         /** getUnscaledThumb inherited */
 723         /** thumbName inherited */
 724         /** createThumb inherited */
 725         /** transform inherited */
 726
 727         /**
 728          * Fix thumbnail files from 1.4 or before, with extreme prejudice
 729          * @todo : do we still care about this? Perhaps a maintenance script
 730          *        can be made instead. Enabling this code results in a serious
 731          *        RTT regression for wikis without 404 handling.
 732          */
 733         function migrateThumbFile( $thumbName ) {
 734                 /* Old code for bug 2532
 735                 $thumbDir = $this->getThumbPath();
 736                 $thumbPath = "$thumbDir/$thumbName";
 737                 if ( is_dir( $thumbPath ) ) {
 738                         // Directory where file should be
 739                         // This happened occasionally due to broken migration code in 1.5
 740                         // Rename to broken-*
 741                         for ( $i = 0; $i < 100; $i++ ) {
 742                                 $broken = $this->repo->getZonePath( 'public' ) . "/broken-$i-$thumbName";
 743                                 if ( !file_exists( $broken ) ) {
 744                                         rename( $thumbPath, $broken );
 745                                         break;
 746                                 }
 747                         }
 748                         // Doesn't exist anymore
 749                         clearstatcache();
 750                 }
 751                 */
 752
 753                 /*
 754                 if ( $this->repo->fileExists( $thumbDir ) ) {
 755                         // Delete file where directory should be
 756                         $this->repo->cleanupBatch( array( $thumbDir ) );
 757                 }
 758                 */
 759         }
 760
 761         /** getHandler inherited */
 762         /** iconThumb inherited */
 763         /** getLastError inherited */
 764
 765         /**
 766          * Get all thumbnail names previously generated for this file
 767          * @param string|bool $archiveName Name of an archive file, default false
 768          * @return array first element is the base dir, then files in that base dir.
 769          */
 770         function getThumbnails( $archiveName = false ) {
 771                 if ( $archiveName ) {
 772                         $dir = $this->getArchiveThumbPath( $archiveName );
 773                 } else {
 774                         $dir = $this->getThumbPath();
 775                 }
 776
 777                 $backend = $this->repo->getBackend();
 778                 $files = array( $dir );
 779                 $iterator = $backend->getFileList( array( 'dir' => $dir ) );
 780                 foreach ( $iterator as $file ) {
 781                         $files[] = $file;
 782                 }
 783
 784                 return $files;
 785         }
 786
 787         /**
 788          * Refresh metadata in memcached, but don't touch thumbnails or squid
 789          */
 790         function purgeMetadataCache() {
 791                 $this->loadFromDB();
 792                 $this->saveToCache();
 793                 $this->purgeHistory();
 794         }
 795
 796         /**
 797          * Purge the shared history (OldLocalFile) cache
 798          */
 799         function purgeHistory() {
 800                 global $wgMemc;
 801
 802                 $hashedName = md5( $this->getName() );
 803                 $oldKey = $this->repo->getSharedCacheKey( 'oldfile', $hashedName );
 804
 805                 // Must purge thumbnails for old versions too! bug 30192
 806                 foreach ( $this->getHistory() as $oldFile ) {
 807                         $oldFile->purgeThumbnails();
 808                 }
 809
 810                 if ( $oldKey ) {
 811                         $wgMemc->delete( $oldKey );
 812                 }
 813         }
 814
 815         /**
 816          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid
 817          */
 818         function purgeCache( $options = array() ) {
 819                 // Refresh metadata cache
 820                 $this->purgeMetadataCache();
 821
 822                 // Delete thumbnails
 823                 $this->purgeThumbnails( $options );
 824
 825                 // Purge squid cache for this file
 826                 SquidUpdate::purge( array( $this->getURL() ) );
 827         }
 828
 829         /**
 830          * Delete cached transformed files for an archived version only.
 831          * @param string $archiveName name of the archived file
 832          */
 833         function purgeOldThumbnails( $archiveName ) {
 834                 global $wgUseSquid;
 835                 wfProfileIn( __METHOD__ );
 836
 837                 // Get a list of old thumbnails and URLs
 838                 $files = $this->getThumbnails( $archiveName );
 839                 $dir = array_shift( $files );
 840                 $this->purgeThumbList( $dir, $files );
 841
 842                 // Purge any custom thumbnail caches
 843                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, $archiveName ) );
 844
 845                 // Purge the squid
 846                 if ( $wgUseSquid ) {
 847                         $urls = array();
 848                         foreach ( $files as $file ) {
 849                                 $urls[] = $this->getArchiveThumbUrl( $archiveName, $file );
 850                         }
 851                         SquidUpdate::purge( $urls );
 852                 }
 853
 854                 wfProfileOut( __METHOD__ );
 855         }
 856
 857         /**
 858          * Delete cached transformed files for the current version only.
 859          */
 860         function purgeThumbnails( $options = array() ) {
 861                 global $wgUseSquid;
 862                 wfProfileIn( __METHOD__ );
 863
 864                 // Delete thumbnails
 865                 $files = $this->getThumbnails();
 866                 // Always purge all files from squid regardless of handler filters
 867                 if ( $wgUseSquid ) {
 868                         $urls = array();
 869                         foreach ( $files as $file ) {
 870                                 $urls[] = $this->getThumbUrl( $file );
 871                         }
 872                         array_shift( $urls ); // don't purge directory
 873                 }
 874
 875                 // Give media handler a chance to filter the file purge list
 876                 if ( !empty( $options['forThumbRefresh'] ) ) {
 877                         $handler = $this->getHandler();
 878                         if ( $handler ) {
 879                                 $handler->filterThumbnailPurgeList( $files, $options );
 880                         }
 881                 }
 882
 883                 $dir = array_shift( $files );
 884                 $this->purgeThumbList( $dir, $files );
 885
 886                 // Purge any custom thumbnail caches
 887                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, false ) );
 888
 889                 // Purge the squid
 890                 if ( $wgUseSquid ) {
 891                         SquidUpdate::purge( $urls );
 892                 }
 893
 894                 wfProfileOut( __METHOD__ );
 895         }
 896
 897         /**
 898          * Delete a list of thumbnails visible at urls
 899          * @param string $dir base dir of the files.
 900          * @param array $files of strings: relative filenames (to $dir)
 901          */
 902         protected function purgeThumbList( $dir, $files ) {
 903                 $fileListDebug = strtr(
 904                         var_export( $files, true ),
 905                         array( "\n" => '' )
 906                 );
 907                 wfDebug( __METHOD__ . ": $fileListDebug\n" );
 908
 909                 $purgeList = array();
 910                 foreach ( $files as $file ) {
 911                         # Check that the base file name is part of the thumb name
 912                         # This is a basic sanity check to avoid erasing unrelated directories
 913                         if ( strpos( $file, $this->getName() ) !== false
 914                                 || strpos( $file, "-thumbnail" ) !== false // "short" thumb name
 915                         ) {
 916                                 $purgeList[] = "{$dir}/{$file}";
 917                         }
 918                 }
 919
 920                 # Delete the thumbnails
 921                 $this->repo->quickPurgeBatch( $purgeList );
 922                 # Clear out the thumbnail directory if empty
 923                 $this->repo->quickCleanDir( $dir );
 924         }
 925
 926         /** purgeDescription inherited */
 927         /** purgeEverything inherited */
 928
 929         /**
 930          * @param $limit null
 931          * @param $start null
 932          * @param $end null
 933          * @param $inc bool
 934          * @return array
 935          */
 936         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
 937                 $dbr = $this->repo->getSlaveDB();
 938                 $tables = array( 'oldimage' );
 939                 $fields = OldLocalFile::selectFields();
 940                 $conds = $opts = $join_conds = array();
 941                 $eq = $inc ? '=' : '';
 942                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
 943
 944                 if ( $start ) {
 945                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
 946                 }
 947
 948                 if ( $end ) {
 949                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
 950                 }
 951
 952                 if ( $limit ) {
 953                         $opts['LIMIT'] = $limit;
 954                 }
 955
 956                 // Search backwards for time > x queries
 957                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
 958                 $opts['ORDER BY'] = "oi_timestamp $order";
 959                 $opts['USE INDEX'] = array( 'oldimage' => 'oi_name_timestamp' );
 960
 961                 wfRunHooks( 'LocalFile::getHistory', array( &$this, &$tables, &$fields,
 962                         &$conds, &$opts, &$join_conds ) );
 963
 964                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
 965                 $r = array();
 966
 967                 foreach ( $res as $row ) {
 968                         if ( $this->repo->oldFileFromRowFactory ) {
 969                                 $r[] = call_user_func( $this->repo->oldFileFromRowFactory, $row, $this->repo );
 970                         } else {
 971                                 $r[] = OldLocalFile::newFromRow( $row, $this->repo );
 972                         }
 973                 }
 974
 975                 if ( $order == 'ASC' ) {
 976                         $r = array_reverse( $r ); // make sure it ends up descending
 977                 }
 978
 979                 return $r;
 980         }
 981
 982         /**
 983          * Return the history of this file, line by line.
 984          * starts with current version, then old versions.
 985          * uses $this->historyLine to check which line to return:
 986          *  0      return line for current version
 987          *  1      query for old versions, return first one
 988          *  2, ... return next old version from above query
 989          * @return bool
 990          */
 991         public function nextHistoryLine() {
 992                 # Polymorphic function name to distinguish foreign and local fetches
 993                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 994
 995                 $dbr = $this->repo->getSlaveDB();
 996
 997                 if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
 998                         $this->historyRes = $dbr->select( 'image',
 999                                 array(
1000                                         '*',
1001                                         "'' AS oi_archive_name",
1002                                         '0 as oi_deleted',
1003                                         'img_sha1'
1004                                 ),
1005                                 array( 'img_name' => $this->title->getDBkey() ),
1006                                 $fname
1007                         );
1008
1009                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
1010                                 $this->historyRes = null;
1011                                 return false;
1012                         }
1013                 } elseif ( $this->historyLine == 1 ) {
1014                         $this->historyRes = $dbr->select( 'oldimage', '*',
1015                                 array( 'oi_name' => $this->title->getDBkey() ),
1016                                 $fname,
1017                                 array( 'ORDER BY' => 'oi_timestamp DESC' )
1018                         );
1019                 }
1020                 $this->historyLine ++;
1021
1022                 return $dbr->fetchObject( $this->historyRes );
1023         }
1024
1025         /**
1026          * Reset the history pointer to the first element of the history
1027          */
1028         public function resetHistory() {
1029                 $this->historyLine = 0;
1030
1031                 if ( !is_null( $this->historyRes ) ) {
1032                         $this->historyRes = null;
1033                 }
1034         }
1035
1036         /** getHashPath inherited */
1037         /** getRel inherited */
1038         /** getUrlRel inherited */
1039         /** getArchiveRel inherited */
1040         /** getArchivePath inherited */
1041         /** getThumbPath inherited */
1042         /** getArchiveUrl inherited */
1043         /** getThumbUrl inherited */
1044         /** getArchiveVirtualUrl inherited */
1045         /** getThumbVirtualUrl inherited */
1046         /** isHashed inherited */
1047
1048         /**
1049          * Upload a file and record it in the DB
1050          * @param string $srcPath source storage path, virtual URL, or filesystem path
1051          * @param string $comment upload description
1052          * @param string $pageText text to use for the new description page,
1053          *                  if a new description page is created
1054          * @param $flags Integer|bool: flags for publish()
1055          * @param array|bool $props File properties, if known. This can be used to reduce the
1056          *               upload time when uploading virtual URLs for which the file info
1057          *               is already known
1058          * @param string|bool $timestamp timestamp for img_timestamp, or false to use the current time
1059          * @param $user User|null: User object or null to use $wgUser
1060          *
1061          * @return FileRepoStatus object. On success, the value member contains the
1062          *     archive name, or an empty string if it was a new file.
1063          */
1064         function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false, $timestamp = false, $user = null ) {
1065                 global $wgContLang;
1066
1067                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1068                         return $this->readOnlyFatalStatus();
1069                 }
1070
1071                 if ( !$props ) {
1072                         wfProfileIn( __METHOD__ . '-getProps' );
1073                         if ( $this->repo->isVirtualUrl( $srcPath )
1074                                 || FileBackend::isStoragePath( $srcPath ) )
1075                         {
1076                                 $props = $this->repo->getFileProps( $srcPath );
1077                         } else {
1078                                 $props = FSFile::getPropsFromPath( $srcPath );
1079                         }
1080                         wfProfileOut( __METHOD__ . '-getProps' );
1081                 }
1082
1083                 $options = array();
1084                 $handler = MediaHandler::getHandler( $props['mime'] );
1085                 if ( $handler ) {
1086                         $options['headers'] = $handler->getStreamHeaders( $props['metadata'] );
1087                 } else {
1088                         $options['headers'] = array();
1089                 }
1090
1091                 // Trim spaces on user supplied text
1092                 $comment = trim( $comment );
1093
1094                 // truncate nicely or the DB will do it for us
1095                 // non-nicely (dangling multi-byte chars, non-truncated version in cache).
1096                 $comment = $wgContLang->truncate( $comment, 255 );
1097                 $this->lock(); // begin
1098                 $status = $this->publish( $srcPath, $flags, $options );
1099
1100                 if ( $status->successCount > 0 ) {
1101                         # Essentially we are displacing any existing current file and saving
1102                         # a new current file at the old location. If just the first succeeded,
1103                         # we still need to displace the current DB entry and put in a new one.
1104                         if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp, $user ) ) {
1105                                 $status->fatal( 'filenotfound', $srcPath );
1106                         }
1107                 }
1108
1109                 $this->unlock(); // done
1110
1111                 return $status;
1112         }
1113
1114         /**
1115          * Record a file upload in the upload log and the image table
1116          * @param $oldver
1117          * @param $desc string
1118          * @param $license string
1119          * @param $copyStatus string
1120          * @param $source string
1121          * @param $watch bool
1122          * @param $timestamp string|bool
1123          * @param $user User object or null to use $wgUser
1124          * @return bool
1125          */
1126         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
1127                 $watch = false, $timestamp = false, User $user = null )
1128         {
1129                 if ( !$user ) {
1130                         global $wgUser;
1131                         $user = $wgUser;
1132                 }
1133
1134                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
1135
1136                 if ( !$this->recordUpload2( $oldver, $desc, $pageText, false, $timestamp, $user ) ) {
1137                         return false;
1138                 }
1139
1140                 if ( $watch ) {
1141                         $user->addWatch( $this->getTitle() );
1142                 }
1143                 return true;
1144         }
1145
1146         /**
1147          * Record a file upload in the upload log and the image table
1148          * @param $oldver
1149          * @param $comment string
1150          * @param $pageText string
1151          * @param $props bool|array
1152          * @param $timestamp bool|string
1153          * @param $user null|User
1154          * @return bool
1155          */
1156         function recordUpload2(
1157                 $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null
1158         ) {
1159                 wfProfileIn( __METHOD__ );
1160
1161                 if ( is_null( $user ) ) {
1162                         global $wgUser;
1163                         $user = $wgUser;
1164                 }
1165
1166                 $dbw = $this->repo->getMasterDB();
1167                 $dbw->begin( __METHOD__ );
1168
1169                 if ( !$props ) {
1170                         wfProfileIn( __METHOD__ . '-getProps' );
1171                         $props = $this->repo->getFileProps( $this->getVirtualUrl() );
1172                         wfProfileOut( __METHOD__ . '-getProps' );
1173                 }
1174
1175                 if ( $timestamp === false ) {
1176                         $timestamp = $dbw->timestamp();
1177                 }
1178
1179                 $props['description'] = $comment;
1180                 $props['user'] = $user->getId();
1181                 $props['user_text'] = $user->getName();
1182                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1183                 $this->setProps( $props );
1184
1185                 # Fail now if the file isn't there
1186                 if ( !$this->fileExists ) {
1187                         wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
1188                         wfProfileOut( __METHOD__ );
1189                         return false;
1190                 }
1191
1192                 $reupload = false;
1193
1194                 # Test to see if the row exists using INSERT IGNORE
1195                 # This avoids race conditions by locking the row until the commit, and also
1196                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
1197                 $dbw->insert( 'image',
1198                         array(
1199                                 'img_name' => $this->getName(),
1200                                 'img_size' => $this->size,
1201                                 'img_width' => intval( $this->width ),
1202                                 'img_height' => intval( $this->height ),
1203                                 'img_bits' => $this->bits,
1204                                 'img_media_type' => $this->media_type,
1205                                 'img_major_mime' => $this->major_mime,
1206                                 'img_minor_mime' => $this->minor_mime,
1207                                 'img_timestamp' => $timestamp,
1208                                 'img_description' => $comment,
1209                                 'img_user' => $user->getId(),
1210                                 'img_user_text' => $user->getName(),
1211                                 'img_metadata' => $this->metadata,
1212                                 'img_sha1' => $this->sha1
1213                         ),
1214                         __METHOD__,
1215                         'IGNORE'
1216                 );
1217                 if ( $dbw->affectedRows() == 0 ) {
1218                         # (bug 34993) Note: $oldver can be empty here, if the previous
1219                         # version of the file was broken. Allow registration of the new
1220                         # version to continue anyway, because that's better than having
1221                         # an image that's not fixable by user operations.
1222
1223                         $reupload = true;
1224                         # Collision, this is an update of a file
1225                         # Insert previous contents into oldimage
1226                         $dbw->insertSelect( 'oldimage', 'image',
1227                                 array(
1228                                         'oi_name'         => 'img_name',
1229                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1230                                         'oi_size'         => 'img_size',
1231                                         'oi_width'        => 'img_width',
1232                                         'oi_height'       => 'img_height',
1233                                         'oi_bits'         => 'img_bits',
1234                                         'oi_timestamp'    => 'img_timestamp',
1235                                         'oi_description'  => 'img_description',
1236                                         'oi_user'         => 'img_user',
1237                                         'oi_user_text'    => 'img_user_text',
1238                                         'oi_metadata'     => 'img_metadata',
1239                                         'oi_media_type'   => 'img_media_type',
1240                                         'oi_major_mime'   => 'img_major_mime',
1241                                         'oi_minor_mime'   => 'img_minor_mime',
1242                                         'oi_sha1'         => 'img_sha1'
1243                                 ),
1244                                 array( 'img_name' => $this->getName() ),
1245                                 __METHOD__
1246                         );
1247
1248                         # Update the current image row
1249                         $dbw->update( 'image',
1250                                 array( /* SET */
1251                                         'img_size'        => $this->size,
1252                                         'img_width'       => intval( $this->width ),
1253                                         'img_height'      => intval( $this->height ),
1254                                         'img_bits'        => $this->bits,
1255                                         'img_media_type'  => $this->media_type,
1256                                         'img_major_mime'  => $this->major_mime,
1257                                         'img_minor_mime'  => $this->minor_mime,
1258                                         'img_timestamp'   => $timestamp,
1259                                         'img_description' => $comment,
1260                                         'img_user'        => $user->getId(),
1261                                         'img_user_text'   => $user->getName(),
1262                                         'img_metadata'    => $this->metadata,
1263                                         'img_sha1'        => $this->sha1
1264                                 ),
1265                                 array( 'img_name' => $this->getName() ),
1266                                 __METHOD__
1267                         );
1268                 } else {
1269                         # This is a new file, so update the image count
1270                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
1271                 }
1272
1273                 $descTitle = $this->getTitle();
1274                 $wikiPage = new WikiFilePage( $descTitle );
1275                 $wikiPage->setFile( $this );
1276
1277                 # Add the log entry
1278                 $action = $reupload ? 'overwrite' : 'upload';
1279
1280                 $logEntry = new ManualLogEntry( 'upload', $action );
1281                 $logEntry->setPerformer( $user );
1282                 $logEntry->setComment( $comment );
1283                 $logEntry->setTarget( $descTitle );
1284
1285                 // Allow people using the api to associate log entries with the upload.
1286                 // Log has a timestamp, but sometimes different from upload timestamp.
1287                 $logEntry->setParameters(
1288                         array(
1289                                 'img_sha1' => $this->sha1,
1290                                 'img_timestamp' => $timestamp,
1291                         )
1292                 );
1293                 // Note we keep $logId around since during new image
1294                 // creation, page doesn't exist yet, so log_page = 0
1295                 // but we want it to point to the page we're making,
1296                 // so we later modify the log entry.
1297                 $logId = $logEntry->insert();
1298                 $logEntry->publish( $logId );
1299
1300                 wfProfileIn( __METHOD__ . '-edit' );
1301                 $exists = $descTitle->exists();
1302
1303                 if ( $exists ) {
1304                         # Create a null revision
1305                         $latest = $descTitle->getLatestRevID();
1306                         $editSummary = LogFormatter::newFromEntry( $logEntry )->getPlainActionText();
1307
1308                         $nullRevision = Revision::newNullRevision(
1309                                 $dbw,
1310                                 $descTitle->getArticleID(),
1311                                 $editSummary,
1312                                 false
1313                         );
1314                         if ( !is_null( $nullRevision ) ) {
1315                                 $nullRevision->insertOn( $dbw );
1316
1317                                 wfRunHooks( 'NewRevisionFromEditComplete', array( $wikiPage, $nullRevision, $latest, $user ) );
1318                                 $wikiPage->updateRevisionOn( $dbw, $nullRevision );
1319                         }
1320                 }
1321
1322                 # Commit the transaction now, in case something goes wrong later
1323                 # The most important thing is that files don't get lost, especially archives
1324                 # NOTE: once we have support for nested transactions, the commit may be moved
1325                 #       to after $wikiPage->doEdit has been called.
1326                 $dbw->commit( __METHOD__ );
1327
1328                 if ( $exists ) {
1329                         # Invalidate the cache for the description page
1330                         $descTitle->invalidateCache();
1331                         $descTitle->purgeSquid();
1332                 } else {
1333                         # New file; create the description page.
1334                         # There's already a log entry, so don't make a second RC entry
1335                         # Squid and file cache for the description page are purged by doEditContent.
1336                         $content = ContentHandler::makeContent( $pageText, $descTitle );
1337                         $status = $wikiPage->doEditContent( $content, $comment, EDIT_NEW | EDIT_SUPPRESS_RC, false, $user );
1338
1339                         if ( isset( $status->value['revision'] ) ) { // XXX; doEdit() uses a transaction
1340                                 $dbw->begin( __METHOD__ );
1341                                 $dbw->update( 'logging',
1342                                         array( 'log_page' => $status->value['revision']->getPage() ),
1343                                         array( 'log_id' => $logId ),
1344                                         __METHOD__
1345                                 );
1346                                 $dbw->commit( __METHOD__ ); // commit before anything bad can happen
1347                         }
1348                 }
1349                 wfProfileOut( __METHOD__ . '-edit' );
1350
1351                 # Save to cache and purge the squid
1352                 # We shall not saveToCache before the commit since otherwise
1353                 # in case of a rollback there is an usable file from memcached
1354                 # which in fact doesn't really exist (bug 24978)
1355                 $this->saveToCache();
1356
1357                 if ( $reupload ) {
1358                         # Delete old thumbnails
1359                         wfProfileIn( __METHOD__ . '-purge' );
1360                         $this->purgeThumbnails();
1361                         wfProfileOut( __METHOD__ . '-purge' );
1362
1363                         # Remove the old file from the squid cache
1364                         SquidUpdate::purge( array( $this->getURL() ) );
1365                 }
1366
1367                 # Hooks, hooks, the magic of hooks...
1368                 wfProfileIn( __METHOD__ . '-hooks' );
1369                 wfRunHooks( 'FileUpload', array( $this, $reupload, $descTitle->exists() ) );
1370                 wfProfileOut( __METHOD__ . '-hooks' );
1371
1372                 # Invalidate cache for all pages using this file
1373                 $update = new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' );
1374                 $update->doUpdate();
1375                 if ( !$reupload ) {
1376                         LinksUpdate::queueRecursiveJobsForTable( $this->getTitle(), 'imagelinks' );
1377                 }
1378
1379                 # Invalidate cache for all pages that redirects on this page
1380                 $redirs = $this->getTitle()->getRedirectsHere();
1381
1382                 foreach ( $redirs as $redir ) {
1383                         if ( !$reupload && $redir->getNamespace() === NS_FILE ) {
1384                                 LinksUpdate::queueRecursiveJobsForTable( $redir, 'imagelinks' );
1385                         }
1386                         $update = new HTMLCacheUpdate( $redir, 'imagelinks' );
1387                         $update->doUpdate();
1388                 }
1389
1390                 wfProfileOut( __METHOD__ );
1391                 return true;
1392         }
1393
1394         /**
1395          * Move or copy a file to its public location. If a file exists at the
1396          * destination, move it to an archive. Returns a FileRepoStatus object with
1397          * the archive name in the "value" member on success.
1398          *
1399          * The archive name should be passed through to recordUpload for database
1400          * registration.
1401          *
1402          * @param string $srcPath local filesystem path to the source image
1403          * @param $flags Integer: a bitwise combination of:
1404          *     File::DELETE_SOURCE      Delete the source file, i.e. move rather than copy
1405          * @param array $options Optional additional parameters
1406          * @return FileRepoStatus object. On success, the value member contains the
1407          *     archive name, or an empty string if it was a new file.
1408          */
1409         function publish( $srcPath, $flags = 0, array $options = array() ) {
1410                 return $this->publishTo( $srcPath, $this->getRel(), $flags, $options );
1411         }
1412
1413         /**
1414          * Move or copy a file to a specified location. Returns a FileRepoStatus
1415          * object with the archive name in the "value" member on success.
1416          *
1417          * The archive name should be passed through to recordUpload for database
1418          * registration.
1419          *
1420          * @param string $srcPath local filesystem path to the source image
1421          * @param string $dstRel target relative path
1422          * @param $flags Integer: a bitwise combination of:
1423          *     File::DELETE_SOURCE      Delete the source file, i.e. move rather than copy
1424          * @param array $options Optional additional parameters
1425          * @return FileRepoStatus object. On success, the value member contains the
1426          *     archive name, or an empty string if it was a new file.
1427          */
1428         function publishTo( $srcPath, $dstRel, $flags = 0, array $options = array() ) {
1429                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1430                         return $this->readOnlyFatalStatus();
1431                 }
1432
1433                 $this->lock(); // begin
1434
1435                 $archiveName = wfTimestamp( TS_MW ) . '!' . $this->getName();
1436                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1437                 $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1438                 $status = $this->repo->publish( $srcPath, $dstRel, $archiveRel, $flags, $options );
1439
1440                 if ( $status->value == 'new' ) {
1441                         $status->value = '';
1442                 } else {
1443                         $status->value = $archiveName;
1444                 }
1445
1446                 $this->unlock(); // done
1447
1448                 return $status;
1449         }
1450
1451         /** getLinksTo inherited */
1452         /** getExifData inherited */
1453         /** isLocal inherited */
1454         /** wasDeleted inherited */
1455
1456         /**
1457          * Move file to the new title
1458          *
1459          * Move current, old version and all thumbnails
1460          * to the new filename. Old file is deleted.
1461          *
1462          * Cache purging is done; checks for validity
1463          * and logging are caller's responsibility
1464          *
1465          * @param $target Title New file name
1466          * @return FileRepoStatus object.
1467          */
1468         function move( $target ) {
1469                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1470                         return $this->readOnlyFatalStatus();
1471                 }
1472
1473                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1474                 $batch = new LocalFileMoveBatch( $this, $target );
1475
1476                 $this->lock(); // begin
1477                 $batch->addCurrent();
1478                 $archiveNames = $batch->addOlds();
1479                 $status = $batch->execute();
1480                 $this->unlock(); // done
1481
1482                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1483
1484                 $this->purgeEverything();
1485                 foreach ( $archiveNames as $archiveName ) {
1486                         $this->purgeOldThumbnails( $archiveName );
1487                 }
1488                 if ( $status->isOK() ) {
1489                         // Now switch the object
1490                         $this->title = $target;
1491                         // Force regeneration of the name and hashpath
1492                         unset( $this->name );
1493                         unset( $this->hashPath );
1494                         // Purge the new image
1495                         $this->purgeEverything();
1496                 }
1497
1498                 return $status;
1499         }
1500
1501         /**
1502          * Delete all versions of the file.
1503          *
1504          * Moves the files into an archive directory (or deletes them)
1505          * and removes the database rows.
1506          *
1507          * Cache purging is done; logging is caller's responsibility.
1508          *
1509          * @param $reason
1510          * @param $suppress
1511          * @return FileRepoStatus object.
1512          */
1513         function delete( $reason, $suppress = false ) {
1514                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1515                         return $this->readOnlyFatalStatus();
1516                 }
1517
1518                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1519
1520                 $this->lock(); // begin
1521                 $batch->addCurrent();
1522                 # Get old version relative paths
1523                 $archiveNames = $batch->addOlds();
1524                 $status = $batch->execute();
1525                 $this->unlock(); // done
1526
1527                 if ( $status->isOK() ) {
1528                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => -1 ) ) );
1529                 }
1530
1531                 $this->purgeEverything();
1532                 foreach ( $archiveNames as $archiveName ) {
1533                         $this->purgeOldThumbnails( $archiveName );
1534                 }
1535
1536                 return $status;
1537         }
1538
1539         /**
1540          * Delete an old version of the file.
1541          *
1542          * Moves the file into an archive directory (or deletes it)
1543          * and removes the database row.
1544          *
1545          * Cache purging is done; logging is caller's responsibility.
1546          *
1547          * @param $archiveName String
1548          * @param $reason String
1549          * @param $suppress Boolean
1550          * @throws MWException or FSException on database or file store failure
1551          * @return FileRepoStatus object.
1552          */
1553         function deleteOld( $archiveName, $reason, $suppress = false ) {
1554                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1555                         return $this->readOnlyFatalStatus();
1556                 }
1557
1558                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1559
1560                 $this->lock(); // begin
1561                 $batch->addOld( $archiveName );
1562                 $status = $batch->execute();
1563                 $this->unlock(); // done
1564
1565                 $this->purgeOldThumbnails( $archiveName );
1566                 if ( $status->isOK() ) {
1567                         $this->purgeDescription();
1568                         $this->purgeHistory();
1569                 }
1570
1571                 return $status;
1572         }
1573
1574         /**
1575          * Restore all or specified deleted revisions to the given file.
1576          * Permissions and logging are left to the caller.
1577          *
1578          * May throw database exceptions on error.
1579          *
1580          * @param array $versions set of record ids of deleted items to restore,
1581          *                    or empty to restore all revisions.
1582          * @param $unsuppress Boolean
1583          * @return FileRepoStatus
1584          */
1585         function restore( $versions = array(), $unsuppress = false ) {
1586                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1587                         return $this->readOnlyFatalStatus();
1588                 }
1589
1590                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1591
1592                 $this->lock(); // begin
1593                 if ( !$versions ) {
1594                         $batch->addAll();
1595                 } else {
1596                         $batch->addIds( $versions );
1597                 }
1598                 $status = $batch->execute();
1599                 if ( $status->isGood() ) {
1600                         $cleanupStatus = $batch->cleanup();
1601                         $cleanupStatus->successCount = 0;
1602                         $cleanupStatus->failCount = 0;
1603                         $status->merge( $cleanupStatus );
1604                 }
1605                 $this->unlock(); // done
1606
1607                 return $status;
1608         }
1609
1610         /** isMultipage inherited */
1611         /** pageCount inherited */
1612         /** scaleHeight inherited */
1613         /** getImageSize inherited */
1614
1615         /**
1616          * Get the URL of the file description page.
1617          * @return String
1618          */
1619         function getDescriptionUrl() {
1620                 return $this->title->getLocalURL();
1621         }
1622
1623         /**
1624          * Get the HTML text of the description page
1625          * This is not used by ImagePage for local files, since (among other things)
1626          * it skips the parser cache.
1627          * @return bool|mixed
1628          */
1629         function getDescriptionText() {
1630                 $revision = Revision::newFromTitle( $this->title, false, Revision::READ_NORMAL );
1631                 if ( !$revision ) {
1632                         return false;
1633                 }
1634                 $content = $revision->getContent();
1635                 if ( !$content ) {
1636                         return false;
1637                 }
1638                 $pout = $content->getParserOutput( $this->title, null, new ParserOptions() );
1639                 return $pout->getText();
1640         }
1641
1642         /**
1643          * @return string
1644          */
1645         function getDescription( $audience = self::FOR_PUBLIC, User $user = null ) {
1646                 $this->load();
1647                 if ( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
1648                         return '';
1649                 } elseif ( $audience == self::FOR_THIS_USER
1650                         && !$this->userCan( self::DELETED_COMMENT, $user ) )
1651                 {
1652                         return '';
1653                 } else {
1654                         return $this->description;
1655                 }
1656         }
1657
1658         /**
1659          * @return bool|string
1660          */
1661         function getTimestamp() {
1662                 $this->load();
1663                 return $this->timestamp;
1664         }
1665
1666         /**
1667          * @return string
1668          */
1669         function getSha1() {
1670                 $this->load();
1671                 // Initialise now if necessary
1672                 if ( $this->sha1 == '' && $this->fileExists ) {
1673                         $this->lock(); // begin
1674
1675                         $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
1676                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1677                                 $dbw = $this->repo->getMasterDB();
1678                                 $dbw->update( 'image',
1679                                         array( 'img_sha1' => $this->sha1 ),
1680                                         array( 'img_name' => $this->getName() ),
1681                                         __METHOD__ );
1682                                 $this->saveToCache();
1683                         }
1684
1685                         $this->unlock(); // done
1686                 }
1687
1688                 return $this->sha1;
1689         }
1690
1691         /**
1692          * @return bool Whether to cache in RepoGroup (this avoids OOMs)
1693          */
1694         function isCacheable() {
1695                 $this->load();
1696                 // If extra data (metadata) was not loaded then it must have been large
1697                 return $this->extraDataLoaded
1698                         && strlen( serialize( $this->metadata ) ) <= self::CACHE_FIELD_MAX_LEN;
1699         }
1700
1701         /**
1702          * Start a transaction and lock the image for update
1703          * Increments a reference counter if the lock is already held
1704          * @return boolean True if the image exists, false otherwise
1705          */
1706         function lock() {
1707                 $dbw = $this->repo->getMasterDB();
1708
1709                 if ( !$this->locked ) {
1710                         if ( !$dbw->trxLevel() ) {
1711                                 $dbw->begin( __METHOD__ );
1712                                 $this->lockedOwnTrx = true;
1713                         }
1714                         $this->locked++;
1715                 }
1716
1717                 return $dbw->selectField( 'image', '1',
1718                         array( 'img_name' => $this->getName() ), __METHOD__, array( 'FOR UPDATE' ) );
1719         }
1720
1721         /**
1722          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1723          * the transaction and thereby releases the image lock.
1724          */
1725         function unlock() {
1726                 if ( $this->locked ) {
1727                         --$this->locked;
1728                         if ( !$this->locked && $this->lockedOwnTrx ) {
1729                                 $dbw = $this->repo->getMasterDB();
1730                                 $dbw->commit( __METHOD__ );
1731                                 $this->lockedOwnTrx = false;
1732                         }
1733                 }
1734         }
1735
1736         /**
1737          * Roll back the DB transaction and mark the image unlocked
1738          */
1739         function unlockAndRollback() {
1740                 $this->locked = false;
1741                 $dbw = $this->repo->getMasterDB();
1742                 $dbw->rollback( __METHOD__ );
1743                 $this->lockedOwnTrx = false;
1744         }
1745
1746         /**
1747          * @return Status
1748          */
1749         protected function readOnlyFatalStatus() {
1750                 return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
1751                         $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
1752         }
1753 } // LocalFile class
1754
1755 # ------------------------------------------------------------------------------
1756
1757 /**
1758  * Helper class for file deletion
1759  * @ingroup FileAbstraction
1760  */
1761 class LocalFileDeleteBatch {
1762
1763         /**
1764          * @var LocalFile
1765          */
1766         var $file;
1767
1768         var $reason, $srcRels = array(), $archiveUrls = array(), $deletionBatch, $suppress;
1769         var $status;
1770
1771         /**
1772          * @param $file File
1773          * @param $reason string
1774          * @param $suppress bool
1775          */
1776         function __construct( File $file, $reason = '', $suppress = false ) {
1777                 $this->file = $file;
1778                 $this->reason = $reason;
1779                 $this->suppress = $suppress;
1780                 $this->status = $file->repo->newGood();
1781         }
1782
1783         function addCurrent() {
1784                 $this->srcRels['.'] = $this->file->getRel();
1785         }
1786
1787         /**
1788          * @param $oldName string
1789          */
1790         function addOld( $oldName ) {
1791                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
1792                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
1793         }
1794
1795         /**
1796          * Add the old versions of the image to the batch
1797          * @return Array List of archive names from old versions
1798          */
1799         function addOlds() {
1800                 $archiveNames = array();
1801
1802                 $dbw = $this->file->repo->getMasterDB();
1803                 $result = $dbw->select( 'oldimage',
1804                         array( 'oi_archive_name' ),
1805                         array( 'oi_name' => $this->file->getName() ),
1806                         __METHOD__
1807                 );
1808
1809                 foreach ( $result as $row ) {
1810                         $this->addOld( $row->oi_archive_name );
1811                         $archiveNames[] = $row->oi_archive_name;
1812                 }
1813
1814                 return $archiveNames;
1815         }
1816
1817         /**
1818          * @return array
1819          */
1820         function getOldRels() {
1821                 if ( !isset( $this->srcRels['.'] ) ) {
1822                         $oldRels =& $this->srcRels;
1823                         $deleteCurrent = false;
1824                 } else {
1825                         $oldRels = $this->srcRels;
1826                         unset( $oldRels['.'] );
1827                         $deleteCurrent = true;
1828                 }
1829
1830                 return array( $oldRels, $deleteCurrent );
1831         }
1832
1833         /**
1834          * @return array
1835          */
1836         protected function getHashes() {
1837                 $hashes = array();
1838                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1839
1840                 if ( $deleteCurrent ) {
1841                         $hashes['.'] = $this->file->getSha1();
1842                 }
1843
1844                 if ( count( $oldRels ) ) {
1845                         $dbw = $this->file->repo->getMasterDB();
1846                         $res = $dbw->select(
1847                                 'oldimage',
1848                                 array( 'oi_archive_name', 'oi_sha1' ),
1849                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1850                                 __METHOD__
1851                         );
1852
1853                         foreach ( $res as $row ) {
1854                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
1855                                         // Get the hash from the file
1856                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
1857                                         $props = $this->file->repo->getFileProps( $oldUrl );
1858
1859                                         if ( $props['fileExists'] ) {
1860                                                 // Upgrade the oldimage row
1861                                                 $dbw->update( 'oldimage',
1862                                                         array( 'oi_sha1' => $props['sha1'] ),
1863                                                         array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ),
1864                                                         __METHOD__ );
1865                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
1866                                         } else {
1867                                                 $hashes[$row->oi_archive_name] = false;
1868                                         }
1869                                 } else {
1870                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
1871                                 }
1872                         }
1873                 }
1874
1875                 $missing = array_diff_key( $this->srcRels, $hashes );
1876
1877                 foreach ( $missing as $name => $rel ) {
1878                         $this->status->error( 'filedelete-old-unregistered', $name );
1879                 }
1880
1881                 foreach ( $hashes as $name => $hash ) {
1882                         if ( !$hash ) {
1883                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
1884                                 unset( $hashes[$name] );
1885                         }
1886                 }
1887
1888                 return $hashes;
1889         }
1890
1891         function doDBInserts() {
1892                 global $wgUser;
1893
1894                 $dbw = $this->file->repo->getMasterDB();
1895                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
1896                 $encUserId = $dbw->addQuotes( $wgUser->getId() );
1897                 $encReason = $dbw->addQuotes( $this->reason );
1898                 $encGroup = $dbw->addQuotes( 'deleted' );
1899                 $ext = $this->file->getExtension();
1900                 $dotExt = $ext === '' ? '' : ".$ext";
1901                 $encExt = $dbw->addQuotes( $dotExt );
1902                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1903
1904                 // Bitfields to further suppress the content
1905                 if ( $this->suppress ) {
1906                         $bitfield = 0;
1907                         // This should be 15...
1908                         $bitfield |= Revision::DELETED_TEXT;
1909                         $bitfield |= Revision::DELETED_COMMENT;
1910                         $bitfield |= Revision::DELETED_USER;
1911                         $bitfield |= Revision::DELETED_RESTRICTED;
1912                 } else {
1913                         $bitfield = 'oi_deleted';
1914                 }
1915
1916                 if ( $deleteCurrent ) {
1917                         $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) );
1918                         $where = array( 'img_name' => $this->file->getName() );
1919                         $dbw->insertSelect( 'filearchive', 'image',
1920                                 array(
1921                                         'fa_storage_group' => $encGroup,
1922                                         'fa_storage_key'   => "CASE WHEN img_sha1='' THEN '' ELSE $concat END",
1923                                         'fa_deleted_user'      => $encUserId,
1924                                         'fa_deleted_timestamp' => $encTimestamp,
1925                                         'fa_deleted_reason'    => $encReason,
1926                                         'fa_deleted'           => $this->suppress ? $bitfield : 0,
1927
1928                                         'fa_name'         => 'img_name',
1929                                         'fa_archive_name' => 'NULL',
1930                                         'fa_size'         => 'img_size',
1931                                         'fa_width'        => 'img_width',
1932                                         'fa_height'       => 'img_height',
1933                                         'fa_metadata'     => 'img_metadata',
1934                                         'fa_bits'         => 'img_bits',
1935                                         'fa_media_type'   => 'img_media_type',
1936                                         'fa_major_mime'   => 'img_major_mime',
1937                                         'fa_minor_mime'   => 'img_minor_mime',
1938                                         'fa_description'  => 'img_description',
1939                                         'fa_user'         => 'img_user',
1940                                         'fa_user_text'    => 'img_user_text',
1941                                         'fa_timestamp'    => 'img_timestamp',
1942                                         'fa_sha1'         => 'img_sha1',
1943                                 ), $where, __METHOD__ );
1944                 }
1945
1946                 if ( count( $oldRels ) ) {
1947                         $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) );
1948                         $where = array(
1949                                 'oi_name' => $this->file->getName(),
1950                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')' );
1951                         $dbw->insertSelect( 'filearchive', 'oldimage',
1952                                 array(
1953                                         'fa_storage_group' => $encGroup,
1954                                         'fa_storage_key'   => "CASE WHEN oi_sha1='' THEN '' ELSE $concat END",
1955                                         'fa_deleted_user'      => $encUserId,
1956                                         'fa_deleted_timestamp' => $encTimestamp,
1957                                         'fa_deleted_reason'    => $encReason,
1958                                         'fa_deleted'           => $this->suppress ? $bitfield : 'oi_deleted',
1959
1960                                         'fa_name'         => 'oi_name',
1961                                         'fa_archive_name' => 'oi_archive_name',
1962                                         'fa_size'         => 'oi_size',
1963                                         'fa_width'        => 'oi_width',
1964                                         'fa_height'       => 'oi_height',
1965                                         'fa_metadata'     => 'oi_metadata',
1966                                         'fa_bits'         => 'oi_bits',
1967                                         'fa_media_type'   => 'oi_media_type',
1968                                         'fa_major_mime'   => 'oi_major_mime',
1969                                         'fa_minor_mime'   => 'oi_minor_mime',
1970                                         'fa_description'  => 'oi_description',
1971                                         'fa_user'         => 'oi_user',
1972                                         'fa_user_text'    => 'oi_user_text',
1973                                         'fa_timestamp'    => 'oi_timestamp',
1974                                         'fa_sha1'         => 'oi_sha1',
1975                                 ), $where, __METHOD__ );
1976                 }
1977         }
1978
1979         function doDBDeletes() {
1980                 $dbw = $this->file->repo->getMasterDB();
1981                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1982
1983                 if ( count( $oldRels ) ) {
1984                         $dbw->delete( 'oldimage',
1985                                 array(
1986                                         'oi_name' => $this->file->getName(),
1987                                         'oi_archive_name' => array_keys( $oldRels )
1988                                 ), __METHOD__ );
1989                 }
1990
1991                 if ( $deleteCurrent ) {
1992                         $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ );
1993                 }
1994         }
1995
1996         /**
1997          * Run the transaction
1998          * @return FileRepoStatus
1999          */
2000         function execute() {
2001                 wfProfileIn( __METHOD__ );
2002
2003                 $this->file->lock();
2004                 // Leave private files alone
2005                 $privateFiles = array();
2006                 list( $oldRels, ) = $this->getOldRels();
2007                 $dbw = $this->file->repo->getMasterDB();
2008
2009                 if ( !empty( $oldRels ) ) {
2010                         $res = $dbw->select( 'oldimage',
2011                                 array( 'oi_archive_name' ),
2012                                 array( 'oi_name' => $this->file->getName(),
2013                                         'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
2014                                         $dbw->bitAnd( 'oi_deleted', File::DELETED_FILE ) => File::DELETED_FILE ),
2015                                 __METHOD__ );
2016
2017                         foreach ( $res as $row ) {
2018                                 $privateFiles[$row->oi_archive_name] = 1;
2019                         }
2020                 }
2021                 // Prepare deletion batch
2022                 $hashes = $this->getHashes();
2023                 $this->deletionBatch = array();
2024                 $ext = $this->file->getExtension();
2025                 $dotExt = $ext === '' ? '' : ".$ext";
2026
2027                 foreach ( $this->srcRels as $name => $srcRel ) {
2028                         // Skip files that have no hash (missing source).
2029                         // Keep private files where they are.
2030                         if ( isset( $hashes[$name] ) && !array_key_exists( $name, $privateFiles ) ) {
2031                                 $hash = $hashes[$name];
2032                                 $key = $hash . $dotExt;
2033                                 $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
2034                                 $this->deletionBatch[$name] = array( $srcRel, $dstRel );
2035                         }
2036                 }
2037
2038                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
2039                 // We acquire this lock by running the inserts now, before the file operations.
2040                 //
2041                 // This potentially has poor lock contention characteristics -- an alternative
2042                 // scheme would be to insert stub filearchive entries with no fa_name and commit
2043                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
2044                 $this->doDBInserts();
2045
2046                 // Removes non-existent file from the batch, so we don't get errors.
2047                 $this->deletionBatch = $this->removeNonexistentFiles( $this->deletionBatch );
2048
2049                 // Execute the file deletion batch
2050                 $status = $this->file->repo->deleteBatch( $this->deletionBatch );
2051
2052                 if ( !$status->isGood() ) {
2053                         $this->status->merge( $status );
2054                 }
2055
2056                 if ( !$this->status->isOK() ) {
2057                         // Critical file deletion error
2058                         // Roll back inserts, release lock and abort
2059                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
2060                         $this->file->unlockAndRollback();
2061                         wfProfileOut( __METHOD__ );
2062                         return $this->status;
2063                 }
2064
2065                 // Delete image/oldimage rows
2066                 $this->doDBDeletes();
2067
2068                 // Commit and return
2069                 $this->file->unlock();
2070                 wfProfileOut( __METHOD__ );
2071
2072                 return $this->status;
2073         }
2074
2075         /**
2076          * Removes non-existent files from a deletion batch.
2077          * @param $batch array
2078          * @return array
2079          */
2080         function removeNonexistentFiles( $batch ) {
2081                 $files = $newBatch = array();
2082
2083                 foreach ( $batch as $batchItem ) {
2084                         list( $src, ) = $batchItem;
2085                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
2086                 }
2087
2088                 $result = $this->file->repo->fileExistsBatch( $files );
2089
2090                 foreach ( $batch as $batchItem ) {
2091                         if ( $result[$batchItem[0]] ) {
2092                                 $newBatch[] = $batchItem;
2093                         }
2094                 }
2095
2096                 return $newBatch;
2097         }
2098 }
2099
2100 # ------------------------------------------------------------------------------
2101
2102 /**
2103  * Helper class for file undeletion
2104  * @ingroup FileAbstraction
2105  */
2106 class LocalFileRestoreBatch {
2107         /**
2108          * @var LocalFile
2109          */
2110         var $file;
2111
2112         var $cleanupBatch, $ids, $all, $unsuppress = false;
2113
2114         /**
2115          * @param $file File
2116          * @param $unsuppress bool
2117          */
2118         function __construct( File $file, $unsuppress = false ) {
2119                 $this->file = $file;
2120                 $this->cleanupBatch = $this->ids = array();
2121                 $this->ids = array();
2122                 $this->unsuppress = $unsuppress;
2123         }
2124
2125         /**
2126          * Add a file by ID
2127          */
2128         function addId( $fa_id ) {
2129                 $this->ids[] = $fa_id;
2130         }
2131
2132         /**
2133          * Add a whole lot of files by ID
2134          */
2135         function addIds( $ids ) {
2136                 $this->ids = array_merge( $this->ids, $ids );
2137         }
2138
2139         /**
2140          * Add all revisions of the file
2141          */
2142         function addAll() {
2143                 $this->all = true;
2144         }
2145
2146         /**
2147          * Run the transaction, except the cleanup batch.
2148          * The cleanup batch should be run in a separate transaction, because it locks different
2149          * rows and there's no need to keep the image row locked while it's acquiring those locks
2150          * The caller may have its own transaction open.
2151          * So we save the batch and let the caller call cleanup()
2152          * @return FileRepoStatus
2153          */
2154         function execute() {
2155                 global $wgLang;
2156
2157                 if ( !$this->all && !$this->ids ) {
2158                         // Do nothing
2159                         return $this->file->repo->newGood();
2160                 }
2161
2162                 $exists = $this->file->lock();
2163                 $dbw = $this->file->repo->getMasterDB();
2164                 $status = $this->file->repo->newGood();
2165
2166                 // Fetch all or selected archived revisions for the file,
2167                 // sorted from the most recent to the oldest.
2168                 $conditions = array( 'fa_name' => $this->file->getName() );
2169
2170                 if ( !$this->all ) {
2171                         $conditions[] = 'fa_id IN (' . $dbw->makeList( $this->ids ) . ')';
2172                 }
2173
2174                 $result = $dbw->select(
2175                         'filearchive',
2176                         ArchivedFile::selectFields(),
2177                         $conditions,
2178                         __METHOD__,
2179                         array( 'ORDER BY' => 'fa_timestamp DESC' )
2180                 );
2181
2182                 $idsPresent = array();
2183                 $storeBatch = array();
2184                 $insertBatch = array();
2185                 $insertCurrent = false;
2186                 $deleteIds = array();
2187                 $first = true;
2188                 $archiveNames = array();
2189
2190                 foreach ( $result as $row ) {
2191                         $idsPresent[] = $row->fa_id;
2192
2193                         if ( $row->fa_name != $this->file->getName() ) {
2194                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
2195                                 $status->failCount++;
2196                                 continue;
2197                         }
2198
2199                         if ( $row->fa_storage_key == '' ) {
2200                                 // Revision was missing pre-deletion
2201                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
2202                                 $status->failCount++;
2203                                 continue;
2204                         }
2205
2206                         $deletedRel = $this->file->repo->getDeletedHashPath( $row->fa_storage_key ) . $row->fa_storage_key;
2207                         $deletedUrl = $this->file->repo->getVirtualUrl() . '/deleted/' . $deletedRel;
2208
2209                         if ( isset( $row->fa_sha1 ) ) {
2210                                 $sha1 = $row->fa_sha1;
2211                         } else {
2212                                 // old row, populate from key
2213                                 $sha1 = LocalRepo::getHashFromKey( $row->fa_storage_key );
2214                         }
2215
2216                         # Fix leading zero
2217                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
2218                                 $sha1 = substr( $sha1, 1 );
2219                         }
2220
2221                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
2222                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
2223                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
2224                                 || is_null( $row->fa_metadata ) ) {
2225                                 // Refresh our metadata
2226                                 // Required for a new current revision; nice for older ones too. :)
2227                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
2228                         } else {
2229                                 $props = array(
2230                                         'minor_mime' => $row->fa_minor_mime,
2231                                         'major_mime' => $row->fa_major_mime,
2232                                         'media_type' => $row->fa_media_type,
2233                                         'metadata'   => $row->fa_metadata
2234                                 );
2235                         }
2236
2237                         if ( $first && !$exists ) {
2238                                 // This revision will be published as the new current version
2239                                 $destRel = $this->file->getRel();
2240                                 $insertCurrent = array(
2241                                         'img_name'        => $row->fa_name,
2242                                         'img_size'        => $row->fa_size,
2243                                         'img_width'       => $row->fa_width,
2244                                         'img_height'      => $row->fa_height,
2245                                         'img_metadata'    => $props['metadata'],
2246                                         'img_bits'        => $row->fa_bits,
2247                                         'img_media_type'  => $props['media_type'],
2248                                         'img_major_mime'  => $props['major_mime'],
2249                                         'img_minor_mime'  => $props['minor_mime'],
2250                                         'img_description' => $row->fa_description,
2251                                         'img_user'        => $row->fa_user,
2252                                         'img_user_text'   => $row->fa_user_text,
2253                                         'img_timestamp'   => $row->fa_timestamp,
2254                                         'img_sha1'        => $sha1
2255                                 );
2256
2257                                 // The live (current) version cannot be hidden!
2258                                 if ( !$this->unsuppress && $row->fa_deleted ) {
2259                                         $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2260                                         $this->cleanupBatch[] = $row->fa_storage_key;
2261                                 }
2262                         } else {
2263                                 $archiveName = $row->fa_archive_name;
2264
2265                                 if ( $archiveName == '' ) {
2266                                         // This was originally a current version; we
2267                                         // have to devise a new archive name for it.
2268                                         // Format is <timestamp of archiving>!<name>
2269                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
2270
2271                                         do {
2272                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
2273                                                 $timestamp++;
2274                                         } while ( isset( $archiveNames[$archiveName] ) );
2275                                 }
2276
2277                                 $archiveNames[$archiveName] = true;
2278                                 $destRel = $this->file->getArchiveRel( $archiveName );
2279                                 $insertBatch[] = array(
2280                                         'oi_name'         => $row->fa_name,
2281                                         'oi_archive_name' => $archiveName,
2282                                         'oi_size'         => $row->fa_size,
2283                                         'oi_width'        => $row->fa_width,
2284                                         'oi_height'       => $row->fa_height,
2285                                         'oi_bits'         => $row->fa_bits,
2286                                         'oi_description'  => $row->fa_description,
2287                                         'oi_user'         => $row->fa_user,
2288                                         'oi_user_text'    => $row->fa_user_text,
2289                                         'oi_timestamp'    => $row->fa_timestamp,
2290                                         'oi_metadata'     => $props['metadata'],
2291                                         'oi_media_type'   => $props['media_type'],
2292                                         'oi_major_mime'   => $props['major_mime'],
2293                                         'oi_minor_mime'   => $props['minor_mime'],
2294                                         'oi_deleted'      => $this->unsuppress ? 0 : $row->fa_deleted,
2295                                         'oi_sha1'         => $sha1 );
2296                         }
2297
2298                         $deleteIds[] = $row->fa_id;
2299
2300                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
2301                                 // private files can stay where they are
2302                                 $status->successCount++;
2303                         } else {
2304                                 $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2305                                 $this->cleanupBatch[] = $row->fa_storage_key;
2306                         }
2307
2308                         $first = false;
2309                 }
2310
2311                 unset( $result );
2312
2313                 // Add a warning to the status object for missing IDs
2314                 $missingIds = array_diff( $this->ids, $idsPresent );
2315
2316                 foreach ( $missingIds as $id ) {
2317                         $status->error( 'undelete-missing-filearchive', $id );
2318                 }
2319
2320                 // Remove missing files from batch, so we don't get errors when undeleting them
2321                 $storeBatch = $this->removeNonexistentFiles( $storeBatch );
2322
2323                 // Run the store batch
2324                 // Use the OVERWRITE_SAME flag to smooth over a common error
2325                 $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
2326                 $status->merge( $storeStatus );
2327
2328                 if ( !$status->isGood() ) {
2329                         // Even if some files could be copied, fail entirely as that is the
2330                         // easiest thing to do without data loss
2331                         $this->cleanupFailedBatch( $storeStatus, $storeBatch );
2332                         $status->ok = false;
2333                         $this->file->unlock();
2334
2335                         return $status;
2336                 }
2337
2338                 // Run the DB updates
2339                 // Because we have locked the image row, key conflicts should be rare.
2340                 // If they do occur, we can roll back the transaction at this time with
2341                 // no data loss, but leaving unregistered files scattered throughout the
2342                 // public zone.
2343                 // This is not ideal, which is why it's important to lock the image row.
2344                 if ( $insertCurrent ) {
2345                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
2346                 }
2347
2348                 if ( $insertBatch ) {
2349                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
2350                 }
2351
2352                 if ( $deleteIds ) {
2353                         $dbw->delete( 'filearchive',
2354                                 array( 'fa_id IN (' . $dbw->makeList( $deleteIds ) . ')' ),
2355                                 __METHOD__ );
2356                 }
2357
2358                 // If store batch is empty (all files are missing), deletion is to be considered successful
2359                 if ( $status->successCount > 0 || !$storeBatch ) {
2360                         if ( !$exists ) {
2361                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
2362
2363                                 DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
2364
2365                                 $this->file->purgeEverything();
2366                         } else {
2367                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
2368                                 $this->file->purgeDescription();
2369                                 $this->file->purgeHistory();
2370                         }
2371                 }
2372
2373                 $this->file->unlock();
2374
2375                 return $status;
2376         }
2377
2378         /**
2379          * Removes non-existent files from a store batch.
2380          * @param $triplets array
2381          * @return array
2382          */
2383         function removeNonexistentFiles( $triplets ) {
2384                 $files = $filteredTriplets = array();
2385                 foreach ( $triplets as $file ) {
2386                         $files[$file[0]] = $file[0];
2387                 }
2388
2389                 $result = $this->file->repo->fileExistsBatch( $files );
2390
2391                 foreach ( $triplets as $file ) {
2392                         if ( $result[$file[0]] ) {
2393                                 $filteredTriplets[] = $file;
2394                         }
2395                 }
2396
2397                 return $filteredTriplets;
2398         }
2399
2400         /**
2401          * Removes non-existent files from a cleanup batch.
2402          * @param $batch array
2403          * @return array
2404          */
2405         function removeNonexistentFromCleanup( $batch ) {
2406                 $files = $newBatch = array();
2407                 $repo = $this->file->repo;
2408
2409                 foreach ( $batch as $file ) {
2410                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
2411                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
2412                 }
2413
2414                 $result = $repo->fileExistsBatch( $files );
2415
2416                 foreach ( $batch as $file ) {
2417                         if ( $result[$file] ) {
2418                                 $newBatch[] = $file;
2419                         }
2420                 }
2421
2422                 return $newBatch;
2423         }
2424
2425         /**
2426          * Delete unused files in the deleted zone.
2427          * This should be called from outside the transaction in which execute() was called.
2428          * @return FileRepoStatus
2429          */
2430         function cleanup() {
2431                 if ( !$this->cleanupBatch ) {
2432                         return $this->file->repo->newGood();
2433                 }
2434
2435                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
2436
2437                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
2438
2439                 return $status;
2440         }
2441
2442         /**
2443          * Cleanup a failed batch. The batch was only partially successful, so
2444          * rollback by removing all items that were succesfully copied.
2445          *
2446          * @param Status $storeStatus
2447          * @param array $storeBatch
2448          */
2449         function cleanupFailedBatch( $storeStatus, $storeBatch ) {
2450                 $cleanupBatch = array();
2451
2452                 foreach ( $storeStatus->success as $i => $success ) {
2453                         // Check if this item of the batch was successfully copied
2454                         if ( $success ) {
2455                                 // Item was successfully copied and needs to be removed again
2456                                 // Extract ($dstZone, $dstRel) from the batch
2457                                 $cleanupBatch[] = array( $storeBatch[$i][1], $storeBatch[$i][2] );
2458                         }
2459                 }
2460                 $this->file->repo->cleanupBatch( $cleanupBatch );
2461         }
2462 }
2463
2464 # ------------------------------------------------------------------------------
2465
2466 /**
2467  * Helper class for file movement
2468  * @ingroup FileAbstraction
2469  */
2470 class LocalFileMoveBatch {
2471
2472         /**
2473          * @var LocalFile
2474          */
2475         var $file;
2476
2477         /**
2478          * @var Title
2479          */
2480         var $target;
2481
2482         var $cur, $olds, $oldCount, $archive;
2483
2484         /**
2485          * @var DatabaseBase
2486          */
2487         var $db;
2488
2489         /**
2490          * @param File $file
2491          * @param Title $target
2492          */
2493         function __construct( File $file, Title $target ) {
2494                 $this->file = $file;
2495                 $this->target = $target;
2496                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
2497                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
2498                 $this->oldName = $this->file->getName();
2499                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2500                 $this->oldRel = $this->oldHash . $this->oldName;
2501                 $this->newRel = $this->newHash . $this->newName;
2502                 $this->db = $file->getRepo()->getMasterDb();
2503         }
2504
2505         /**
2506          * Add the current image to the batch
2507          */
2508         function addCurrent() {
2509                 $this->cur = array( $this->oldRel, $this->newRel );
2510         }
2511
2512         /**
2513          * Add the old versions of the image to the batch
2514          * @return Array List of archive names from old versions
2515          */
2516         function addOlds() {
2517                 $archiveBase = 'archive';
2518                 $this->olds = array();
2519                 $this->oldCount = 0;
2520                 $archiveNames = array();
2521
2522                 $result = $this->db->select( 'oldimage',
2523                         array( 'oi_archive_name', 'oi_deleted' ),
2524                         array( 'oi_name' => $this->oldName ),
2525                         __METHOD__
2526                 );
2527
2528                 foreach ( $result as $row ) {
2529                         $archiveNames[] = $row->oi_archive_name;
2530                         $oldName = $row->oi_archive_name;
2531                         $bits = explode( '!', $oldName, 2 );
2532
2533                         if ( count( $bits ) != 2 ) {
2534                                 wfDebug( "Old file name missing !: '$oldName' \n" );
2535                                 continue;
2536                         }
2537
2538                         list( $timestamp, $filename ) = $bits;
2539
2540                         if ( $this->oldName != $filename ) {
2541                                 wfDebug( "Old file name doesn't match: '$oldName' \n" );
2542                                 continue;
2543                         }
2544
2545                         $this->oldCount++;
2546
2547                         // Do we want to add those to oldCount?
2548                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2549                                 continue;
2550                         }
2551
2552                         $this->olds[] = array(
2553                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2554                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2555                         );
2556                 }
2557
2558                 return $archiveNames;
2559         }
2560
2561         /**
2562          * Perform the move.
2563          * @return FileRepoStatus
2564          */
2565         function execute() {
2566                 $repo = $this->file->repo;
2567                 $status = $repo->newGood();
2568
2569                 $triplets = $this->getMoveTriplets();
2570                 $triplets = $this->removeNonexistentFiles( $triplets );
2571
2572                 $this->file->lock(); // begin
2573                 // Rename the file versions metadata in the DB.
2574                 // This implicitly locks the destination file, which avoids race conditions.
2575                 // If we moved the files from A -> C before DB updates, another process could
2576                 // move files from B -> C at this point, causing storeBatch() to fail and thus
2577                 // cleanupTarget() to trigger. It would delete the C files and cause data loss.
2578                 $statusDb = $this->doDBUpdates();
2579                 if ( !$statusDb->isGood() ) {
2580                         $this->file->unlockAndRollback();
2581                         $statusDb->ok = false;
2582                         return $statusDb;
2583                 }
2584                 wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: {$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2585
2586                 // Copy the files into their new location.
2587                 // If a prior process fataled copying or cleaning up files we tolerate any
2588                 // of the existing files if they are identical to the ones being stored.
2589                 $statusMove = $repo->storeBatch( $triplets, FileRepo::OVERWRITE_SAME );
2590                 wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: {$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2591                 if ( !$statusMove->isGood() ) {
2592                         // Delete any files copied over (while the destination is still locked)
2593                         $this->cleanupTarget( $triplets );
2594                         $this->file->unlockAndRollback(); // unlocks the destination
2595                         wfDebugLog( 'imagemove', "Error in moving files: " . $statusMove->getWikiText() );
2596                         $statusMove->ok = false;
2597                         return $statusMove;
2598                 }
2599                 $this->file->unlock(); // done
2600
2601                 // Everything went ok, remove the source files
2602                 $this->cleanupSource( $triplets );
2603
2604                 $status->merge( $statusDb );
2605                 $status->merge( $statusMove );
2606
2607                 return $status;
2608         }
2609
2610         /**
2611          * Do the database updates and return a new FileRepoStatus indicating how
2612          * many rows where updated.
2613          *
2614          * @return FileRepoStatus
2615          */
2616         function doDBUpdates() {
2617                 $repo = $this->file->repo;
2618                 $status = $repo->newGood();
2619                 $dbw = $this->db;
2620
2621                 // Update current image
2622                 $dbw->update(
2623                         'image',
2624                         array( 'img_name' => $this->newName ),
2625                         array( 'img_name' => $this->oldName ),
2626                         __METHOD__
2627                 );
2628
2629                 if ( $dbw->affectedRows() ) {
2630                         $status->successCount++;
2631                 } else {
2632                         $status->failCount++;
2633                         $status->fatal( 'imageinvalidfilename' );
2634                         return $status;
2635                 }
2636
2637                 // Update old images
2638                 $dbw->update(
2639                         'oldimage',
2640                         array(
2641                                 'oi_name' => $this->newName,
2642                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name',
2643                                         $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2644                         ),
2645                         array( 'oi_name' => $this->oldName ),
2646                         __METHOD__
2647                 );
2648
2649                 $affected = $dbw->affectedRows();
2650                 $total = $this->oldCount;
2651                 $status->successCount += $affected;
2652                 // Bug 34934: $total is based on files that actually exist.
2653                 // There may be more DB rows than such files, in which case $affected
2654                 // can be greater than $total. We use max() to avoid negatives here.
2655                 $status->failCount += max( 0, $total - $affected );
2656                 if ( $status->failCount ) {
2657                         $status->error( 'imageinvalidfilename' );
2658                 }
2659
2660                 return $status;
2661         }
2662
2663         /**
2664          * Generate triplets for FileRepo::storeBatch().
2665          * @return array
2666          */
2667         function getMoveTriplets() {
2668                 $moves = array_merge( array( $this->cur ), $this->olds );
2669                 $triplets = array(); // The format is: (srcUrl, destZone, destUrl)
2670
2671                 foreach ( $moves as $move ) {
2672                         // $move: (oldRelativePath, newRelativePath)
2673                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2674                         $triplets[] = array( $srcUrl, 'public', $move[1] );
2675                         wfDebugLog( 'imagemove', "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}" );
2676                 }
2677
2678                 return $triplets;
2679         }
2680
2681         /**
2682          * Removes non-existent files from move batch.
2683          * @param $triplets array
2684          * @return array
2685          */
2686         function removeNonexistentFiles( $triplets ) {
2687                 $files = array();
2688
2689                 foreach ( $triplets as $file ) {
2690                         $files[$file[0]] = $file[0];
2691                 }
2692
2693                 $result = $this->file->repo->fileExistsBatch( $files );
2694                 $filteredTriplets = array();
2695
2696                 foreach ( $triplets as $file ) {
2697                         if ( $result[$file[0]] ) {
2698                                 $filteredTriplets[] = $file;
2699                         } else {
2700                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
2701                         }
2702                 }
2703
2704                 return $filteredTriplets;
2705         }
2706
2707         /**
2708          * Cleanup a partially moved array of triplets by deleting the target
2709          * files. Called if something went wrong half way.
2710          */
2711         function cleanupTarget( $triplets ) {
2712                 // Create dest pairs from the triplets
2713                 $pairs = array();
2714                 foreach ( $triplets as $triplet ) {
2715                         // $triplet: (old source virtual URL, dst zone, dest rel)
2716                         $pairs[] = array( $triplet[1], $triplet[2] );
2717                 }
2718
2719                 $this->file->repo->cleanupBatch( $pairs );
2720         }
2721
2722         /**
2723          * Cleanup a fully moved array of triplets by deleting the source files.
2724          * Called at the end of the move process if everything else went ok.
2725          */
2726         function cleanupSource( $triplets ) {
2727                 // Create source file names from the triplets
2728                 $files = array();
2729                 foreach ( $triplets as $triplet ) {
2730                         $files[] = $triplet[0];
2731                 }
2732
2733                 $this->file->repo->cleanupBatch( $files );
2734         }
2735 }