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', 8 );
  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 all this has been loaded from the database (loadFromXxx)
  71                 $upgraded,         # Whether the row was upgraded on load
  72                 $locked,           # True if the image row is locked
  73                 $missing,          # True if file is not present in file system. Not to be cached in memcached
  74                 $deleted;          # Bitfield akin to rev_deleted
  75
  76         /**#@-*/
  77
  78         /**
  79          * @var LocalRepo
  80          */
  81         var $repo;
  82
  83         protected $repoClass = 'LocalRepo';
  84
  85         /**
  86          * Create a LocalFile from a title
  87          * Do not call this except from inside a repo class.
  88          *
  89          * Note: $unused param is only here to avoid an E_STRICT
  90          *
  91          * @param $title
  92          * @param $repo
  93          * @param $unused
  94          *
  95          * @return LocalFile
  96          */
  97         static function newFromTitle( $title, $repo, $unused = null ) {
  98                 return new self( $title, $repo );
  99         }
 100
 101         /**
 102          * Create a LocalFile from a title
 103          * Do not call this except from inside a repo class.
 104          *
 105          * @param $row
 106          * @param $repo
 107          *
 108          * @return LocalFile
 109          */
 110         static function newFromRow( $row, $repo ) {
 111                 $title = Title::makeTitle( NS_FILE, $row->img_name );
 112                 $file = new self( $title, $repo );
 113                 $file->loadFromRow( $row );
 114
 115                 return $file;
 116         }
 117
 118         /**
 119          * Create a LocalFile from a SHA-1 key
 120          * Do not call this except from inside a repo class.
 121          *
 122          * @param $sha1 string base-36 SHA-1
 123          * @param $repo LocalRepo
 124          * @param string|bool $timestamp MW_timestamp (optional)
 125          *
 126          * @return bool|LocalFile
 127          */
 128         static function newFromKey( $sha1, $repo, $timestamp = false ) {
 129                 $dbr = $repo->getSlaveDB();
 130
 131                 $conds = array( 'img_sha1' => $sha1 );
 132                 if ( $timestamp ) {
 133                         $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
 134                 }
 135
 136                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
 137                 if ( $row ) {
 138                         return self::newFromRow( $row, $repo );
 139                 } else {
 140                         return false;
 141                 }
 142         }
 143
 144         /**
 145          * Fields in the image table
 146          * @return array
 147          */
 148         static function selectFields() {
 149                 return array(
 150                         'img_name',
 151                         'img_size',
 152                         'img_width',
 153                         'img_height',
 154                         'img_metadata',
 155                         'img_bits',
 156                         'img_media_type',
 157                         'img_major_mime',
 158                         'img_minor_mime',
 159                         'img_description',
 160                         'img_user',
 161                         'img_user_text',
 162                         'img_timestamp',
 163                         'img_sha1',
 164                 );
 165         }
 166
 167         /**
 168          * Constructor.
 169          * Do not call this except from inside a repo class.
 170          */
 171         function __construct( $title, $repo ) {
 172                 parent::__construct( $title, $repo );
 173
 174                 $this->metadata = '';
 175                 $this->historyLine = 0;
 176                 $this->historyRes = null;
 177                 $this->dataLoaded = false;
 178
 179                 $this->assertRepoDefined();
 180                 $this->assertTitleDefined();
 181         }
 182
 183         /**
 184          * Get the memcached key for the main data for this file, or false if
 185          * there is no access to the shared cache.
 186          * @return bool
 187          */
 188         function getCacheKey() {
 189                 $hashedName = md5( $this->getName() );
 190
 191                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 192         }
 193
 194         /**
 195          * Try to load file metadata from memcached. Returns true on success.
 196          * @return bool
 197          */
 198         function loadFromCache() {
 199                 global $wgMemc;
 200
 201                 wfProfileIn( __METHOD__ );
 202                 $this->dataLoaded = false;
 203                 $key = $this->getCacheKey();
 204
 205                 if ( !$key ) {
 206                         wfProfileOut( __METHOD__ );
 207                         return false;
 208                 }
 209
 210                 $cachedValues = $wgMemc->get( $key );
 211
 212                 // Check if the key existed and belongs to this version of MediaWiki
 213                 if ( isset( $cachedValues['version'] ) && ( $cachedValues['version'] == MW_FILE_VERSION ) ) {
 214                         wfDebug( "Pulling file metadata from cache key $key\n" );
 215                         $this->fileExists = $cachedValues['fileExists'];
 216                         if ( $this->fileExists ) {
 217                                 $this->setProps( $cachedValues );
 218                         }
 219                         $this->dataLoaded = true;
 220                 }
 221
 222                 if ( $this->dataLoaded ) {
 223                         wfIncrStats( 'image_cache_hit' );
 224                 } else {
 225                         wfIncrStats( 'image_cache_miss' );
 226                 }
 227
 228                 wfProfileOut( __METHOD__ );
 229                 return $this->dataLoaded;
 230         }
 231
 232         /**
 233          * Save the file metadata to memcached
 234          */
 235         function saveToCache() {
 236                 global $wgMemc;
 237
 238                 $this->load();
 239                 $key = $this->getCacheKey();
 240
 241                 if ( !$key ) {
 242                         return;
 243                 }
 244
 245                 $fields = $this->getCacheFields( '' );
 246                 $cache = array( 'version' => MW_FILE_VERSION );
 247                 $cache['fileExists'] = $this->fileExists;
 248
 249                 if ( $this->fileExists ) {
 250                         foreach ( $fields as $field ) {
 251                                 $cache[$field] = $this->$field;
 252                         }
 253                 }
 254
 255                 $wgMemc->set( $key, $cache, 60 * 60 * 24 * 7 ); // A week
 256         }
 257
 258         /**
 259          * Load metadata from the file itself
 260          */
 261         function loadFromFile() {
 262                 $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 263                 $this->setProps( $props );
 264         }
 265
 266         /**
 267          * @param $prefix string
 268          * @return array
 269          */
 270         function getCacheFields( $prefix = 'img_' ) {
 271                 static $fields = array( 'size', 'width', 'height', 'bits', 'media_type',
 272                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user', 'user_text', 'description' );
 273                 static $results = array();
 274
 275                 if ( $prefix == '' ) {
 276                         return $fields;
 277                 }
 278
 279                 if ( !isset( $results[$prefix] ) ) {
 280                         $prefixedFields = array();
 281                         foreach ( $fields as $field ) {
 282                                 $prefixedFields[] = $prefix . $field;
 283                         }
 284                         $results[$prefix] = $prefixedFields;
 285                 }
 286
 287                 return $results[$prefix];
 288         }
 289
 290         /**
 291          * Load file metadata from the DB
 292          */
 293         function loadFromDB() {
 294                 # Polymorphic function name to distinguish foreign and local fetches
 295                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 296                 wfProfileIn( $fname );
 297
 298                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 299                 $this->dataLoaded = true;
 300
 301                 $dbr = $this->repo->getMasterDB();
 302
 303                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 304                         array( 'img_name' => $this->getName() ), $fname );
 305
 306                 if ( $row ) {
 307                         $this->loadFromRow( $row );
 308                 } else {
 309                         $this->fileExists = false;
 310                 }
 311
 312                 wfProfileOut( $fname );
 313         }
 314
 315         /**
 316          * Decode a row from the database (either object or array) to an array
 317          * with timestamps and MIME types decoded, and the field prefix removed.
 318          * @param $row
 319          * @param $prefix string
 320          * @throws MWException
 321          * @return array
 322          */
 323         function decodeRow( $row, $prefix = 'img_' ) {
 324                 $array = (array)$row;
 325                 $prefixLength = strlen( $prefix );
 326
 327                 // Sanity check prefix once
 328                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 329                         throw new MWException( __METHOD__ .  ': incorrect $prefix parameter' );
 330                 }
 331
 332                 $decoded = array();
 333
 334                 foreach ( $array as $name => $value ) {
 335                         $decoded[substr( $name, $prefixLength )] = $value;
 336                 }
 337
 338                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 339
 340                 if ( empty( $decoded['major_mime'] ) ) {
 341                         $decoded['mime'] = 'unknown/unknown';
 342                 } else {
 343                         if ( !$decoded['minor_mime'] ) {
 344                                 $decoded['minor_mime'] = 'unknown';
 345                         }
 346                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 347                 }
 348
 349                 # Trim zero padding from char/binary field
 350                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 351
 352                 return $decoded;
 353         }
 354
 355         /**
 356          * Load file metadata from a DB result row
 357          */
 358         function loadFromRow( $row, $prefix = 'img_' ) {
 359                 $this->dataLoaded = true;
 360                 $array = $this->decodeRow( $row, $prefix );
 361
 362                 foreach ( $array as $name => $value ) {
 363                         $this->$name = $value;
 364                 }
 365
 366                 $this->fileExists = true;
 367                 $this->maybeUpgradeRow();
 368         }
 369
 370         /**
 371          * Load file metadata from cache or DB, unless already loaded
 372          */
 373         function load() {
 374                 if ( !$this->dataLoaded ) {
 375                         if ( !$this->loadFromCache() ) {
 376                                 $this->loadFromDB();
 377                                 $this->saveToCache();
 378                         }
 379                         $this->dataLoaded = true;
 380                 }
 381         }
 382
 383         /**
 384          * Upgrade a row if it needs it
 385          */
 386         function maybeUpgradeRow() {
 387                 global $wgUpdateCompatibleMetadata;
 388                 if ( wfReadOnly() ) {
 389                         return;
 390                 }
 391
 392                 if ( is_null( $this->media_type ) ||
 393                         $this->mime == 'image/svg'
 394                 ) {
 395                         $this->upgradeRow();
 396                         $this->upgraded = true;
 397                 } else {
 398                         $handler = $this->getHandler();
 399                         if ( $handler ) {
 400                                 $validity = $handler->isMetadataValid( $this, $this->metadata );
 401                                 if ( $validity === MediaHandler::METADATA_BAD
 402                                         || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata )
 403                                 ) {
 404                                         $this->upgradeRow();
 405                                         $this->upgraded = true;
 406                                 }
 407                         }
 408                 }
 409         }
 410
 411         function getUpgraded() {
 412                 return $this->upgraded;
 413         }
 414
 415         /**
 416          * Fix assorted version-related problems with the image row by reloading it from the file
 417          */
 418         function upgradeRow() {
 419                 wfProfileIn( __METHOD__ );
 420
 421                 $this->lock(); // begin
 422
 423                 $this->loadFromFile();
 424
 425                 # Don't destroy file info of missing files
 426                 if ( !$this->fileExists ) {
 427                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 428                         wfProfileOut( __METHOD__ );
 429                         return;
 430                 }
 431
 432                 $dbw = $this->repo->getMasterDB();
 433                 list( $major, $minor ) = self::splitMime( $this->mime );
 434
 435                 if ( wfReadOnly() ) {
 436                         wfProfileOut( __METHOD__ );
 437                         return;
 438                 }
 439                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 440
 441                 $dbw->update( 'image',
 442                         array(
 443                                 'img_width'      => $this->width,
 444                                 'img_height'     => $this->height,
 445                                 'img_bits'       => $this->bits,
 446                                 'img_media_type' => $this->media_type,
 447                                 'img_major_mime' => $major,
 448                                 'img_minor_mime' => $minor,
 449                                 'img_metadata'   => $this->metadata,
 450                                 'img_sha1'       => $this->sha1,
 451                         ),
 452                         array( 'img_name' => $this->getName() ),
 453                         __METHOD__
 454                 );
 455
 456                 $this->saveToCache();
 457
 458                 $this->unlock(); // done
 459
 460                 wfProfileOut( __METHOD__ );
 461         }
 462
 463         /**
 464          * Set properties in this object to be equal to those given in the
 465          * associative array $info. Only cacheable fields can be set.
 466          *
 467          * If 'mime' is given, it will be split into major_mime/minor_mime.
 468          * If major_mime/minor_mime are given, $this->mime will also be set.
 469          */
 470         function setProps( $info ) {
 471                 $this->dataLoaded = true;
 472                 $fields = $this->getCacheFields( '' );
 473                 $fields[] = 'fileExists';
 474
 475                 foreach ( $fields as $field ) {
 476                         if ( isset( $info[$field] ) ) {
 477                                 $this->$field = $info[$field];
 478                         }
 479                 }
 480
 481                 // Fix up mime fields
 482                 if ( isset( $info['major_mime'] ) ) {
 483                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 484                 } elseif ( isset( $info['mime'] ) ) {
 485                         $this->mime = $info['mime'];
 486                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 487                 }
 488         }
 489
 490         /** splitMime inherited */
 491         /** getName inherited */
 492         /** getTitle inherited */
 493         /** getURL inherited */
 494         /** getViewURL inherited */
 495         /** getPath inherited */
 496         /** isVisible inhereted */
 497
 498         /**
 499          * @return bool
 500          */
 501         function isMissing() {
 502                 if ( $this->missing === null ) {
 503                         list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl() );
 504                         $this->missing = !$fileExists;
 505                 }
 506                 return $this->missing;
 507         }
 508
 509         /**
 510          * Return the width of the image
 511          *
 512          * @param $page int
 513          * @return bool|int Returns false on error
 514          */
 515         public function getWidth( $page = 1 ) {
 516                 $this->load();
 517
 518                 if ( $this->isMultipage() ) {
 519                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 520                         if ( $dim ) {
 521                                 return $dim['width'];
 522                         } else {
 523                                 return false;
 524                         }
 525                 } else {
 526                         return $this->width;
 527                 }
 528         }
 529
 530         /**
 531          * Return the height of the image
 532          *
 533          * @param $page int
 534          * @return bool|int Returns false on error
 535          */
 536         public function getHeight( $page = 1 ) {
 537                 $this->load();
 538
 539                 if ( $this->isMultipage() ) {
 540                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 541                         if ( $dim ) {
 542                                 return $dim['height'];
 543                         } else {
 544                                 return false;
 545                         }
 546                 } else {
 547                         return $this->height;
 548                 }
 549         }
 550
 551         /**
 552          * Returns ID or name of user who uploaded the file
 553          *
 554          * @param $type string 'text' or 'id'
 555          * @return int|string
 556          */
 557         function getUser( $type = 'text' ) {
 558                 $this->load();
 559
 560                 if ( $type == 'text' ) {
 561                         return $this->user_text;
 562                 } elseif ( $type == 'id' ) {
 563                         return $this->user;
 564                 }
 565         }
 566
 567         /**
 568          * Get handler-specific metadata
 569          * @return string
 570          */
 571         function getMetadata() {
 572                 $this->load();
 573                 return $this->metadata;
 574         }
 575
 576         /**
 577          * @return int
 578          */
 579         function getBitDepth() {
 580                 $this->load();
 581                 return $this->bits;
 582         }
 583
 584         /**
 585          * Return the size of the image file, in bytes
 586          * @return int
 587          */
 588         public function getSize() {
 589                 $this->load();
 590                 return $this->size;
 591         }
 592
 593         /**
 594          * Returns the mime type of the file.
 595          * @return string
 596          */
 597         function getMimeType() {
 598                 $this->load();
 599                 return $this->mime;
 600         }
 601
 602         /**
 603          * Return the type of the media in the file.
 604          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 605          * @return string
 606          */
 607         function getMediaType() {
 608                 $this->load();
 609                 return $this->media_type;
 610         }
 611
 612         /** canRender inherited */
 613         /** mustRender inherited */
 614         /** allowInlineDisplay inherited */
 615         /** isSafeFile inherited */
 616         /** isTrustedFile inherited */
 617
 618         /**
 619          * Returns true if the file exists on disk.
 620          * @return boolean Whether file exist on disk.
 621          */
 622         public function exists() {
 623                 $this->load();
 624                 return $this->fileExists;
 625         }
 626
 627         /** getTransformScript inherited */
 628         /** getUnscaledThumb inherited */
 629         /** thumbName inherited */
 630         /** createThumb inherited */
 631         /** transform inherited */
 632
 633         /**
 634          * Fix thumbnail files from 1.4 or before, with extreme prejudice
 635          * @TODO: do we still care about this? Perhaps a maintenance script
 636          *        can be made instead. Enabling this code results in a serious
 637          *        RTT regression for wikis without 404 handling.
 638          */
 639         function migrateThumbFile( $thumbName ) {
 640                 $thumbDir = $this->getThumbPath();
 641
 642                 /* Old code for bug 2532
 643                 $thumbPath = "$thumbDir/$thumbName";
 644                 if ( is_dir( $thumbPath ) ) {
 645                         // Directory where file should be
 646                         // This happened occasionally due to broken migration code in 1.5
 647                         // Rename to broken-*
 648                         for ( $i = 0; $i < 100 ; $i++ ) {
 649                                 $broken = $this->repo->getZonePath( 'public' ) . "/broken-$i-$thumbName";
 650                                 if ( !file_exists( $broken ) ) {
 651                                         rename( $thumbPath, $broken );
 652                                         break;
 653                                 }
 654                         }
 655                         // Doesn't exist anymore
 656                         clearstatcache();
 657                 }
 658                 */
 659
 660                 /*
 661                 if ( $this->repo->fileExists( $thumbDir ) ) {
 662                         // Delete file where directory should be
 663                         $this->repo->cleanupBatch( array( $thumbDir ) );
 664                 }
 665                 */
 666         }
 667
 668         /** getHandler inherited */
 669         /** iconThumb inherited */
 670         /** getLastError inherited */
 671
 672         /**
 673          * Get all thumbnail names previously generated for this file
 674          * @param $archiveName string|bool Name of an archive file, default false
 675          * @return array first element is the base dir, then files in that base dir.
 676          */
 677         function getThumbnails( $archiveName = false ) {
 678                 if ( $archiveName ) {
 679                         $dir = $this->getArchiveThumbPath( $archiveName );
 680                 } else {
 681                         $dir = $this->getThumbPath();
 682                 }
 683
 684                 $backend = $this->repo->getBackend();
 685                 $files = array( $dir );
 686                 $iterator = $backend->getFileList( array( 'dir' => $dir ) );
 687                 foreach ( $iterator as $file ) {
 688                         $files[] = $file;
 689                 }
 690
 691                 return $files;
 692         }
 693
 694         /**
 695          * Refresh metadata in memcached, but don't touch thumbnails or squid
 696          */
 697         function purgeMetadataCache() {
 698                 $this->loadFromDB();
 699                 $this->saveToCache();
 700                 $this->purgeHistory();
 701         }
 702
 703         /**
 704          * Purge the shared history (OldLocalFile) cache
 705          */
 706         function purgeHistory() {
 707                 global $wgMemc;
 708
 709                 $hashedName = md5( $this->getName() );
 710                 $oldKey = $this->repo->getSharedCacheKey( 'oldfile', $hashedName );
 711
 712                 // Must purge thumbnails for old versions too! bug 30192
 713                 foreach( $this->getHistory() as $oldFile ) {
 714                         $oldFile->purgeThumbnails();
 715                 }
 716
 717                 if ( $oldKey ) {
 718                         $wgMemc->delete( $oldKey );
 719                 }
 720         }
 721
 722         /**
 723          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid
 724          */
 725         function purgeCache( $options = array() ) {
 726                 // Refresh metadata cache
 727                 $this->purgeMetadataCache();
 728
 729                 // Delete thumbnails
 730                 $this->purgeThumbnails( $options );
 731
 732                 // Purge squid cache for this file
 733                 SquidUpdate::purge( array( $this->getURL() ) );
 734         }
 735
 736         /**
 737          * Delete cached transformed files for an archived version only.
 738          * @param $archiveName string name of the archived file
 739          */
 740         function purgeOldThumbnails( $archiveName ) {
 741                 global $wgUseSquid;
 742                 wfProfileIn( __METHOD__ );
 743
 744                 // Get a list of old thumbnails and URLs
 745                 $files = $this->getThumbnails( $archiveName );
 746                 $dir = array_shift( $files );
 747                 $this->purgeThumbList( $dir, $files );
 748
 749                 // Purge any custom thumbnail caches
 750                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, $archiveName ) );
 751
 752                 // Purge the squid
 753                 if ( $wgUseSquid ) {
 754                         $urls = array();
 755                         foreach( $files as $file ) {
 756                                 $urls[] = $this->getArchiveThumbUrl( $archiveName, $file );
 757                         }
 758                         SquidUpdate::purge( $urls );
 759                 }
 760
 761                 wfProfileOut( __METHOD__ );
 762         }
 763
 764         /**
 765          * Delete cached transformed files for the current version only.
 766          */
 767         function purgeThumbnails( $options = array() ) {
 768                 global $wgUseSquid;
 769                 wfProfileIn( __METHOD__ );
 770
 771                 // Delete thumbnails
 772                 $files = $this->getThumbnails();
 773
 774                 // Give media handler a chance to filter the purge list
 775                 if ( !empty( $options['forThumbRefresh'] ) ) {
 776                         $handler = $this->getHandler();
 777                         if ( $handler ) {
 778                                 $handler->filterThumbnailPurgeList( $files, $options );
 779                         }
 780                 }
 781
 782                 $dir = array_shift( $files );
 783                 $this->purgeThumbList( $dir, $files );
 784
 785                 // Purge any custom thumbnail caches
 786                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, false ) );
 787
 788                 // Purge the squid
 789                 if ( $wgUseSquid ) {
 790                         $urls = array();
 791                         foreach( $files as $file ) {
 792                                 $urls[] = $this->getThumbUrl( $file );
 793                         }
 794                         SquidUpdate::purge( $urls );
 795                 }
 796
 797                 wfProfileOut( __METHOD__ );
 798         }
 799
 800         /**
 801          * Delete a list of thumbnails visible at urls
 802          * @param $dir string base dir of the files.
 803          * @param $files array of strings: relative filenames (to $dir)
 804          */
 805         protected function purgeThumbList( $dir, $files ) {
 806                 $fileListDebug = strtr(
 807                         var_export( $files, true ),
 808                         array("\n"=>'')
 809                 );
 810                 wfDebug( __METHOD__ . ": $fileListDebug\n" );
 811
 812                 $purgeList = array();
 813                 foreach ( $files as $file ) {
 814                         # Check that the base file name is part of the thumb name
 815                         # This is a basic sanity check to avoid erasing unrelated directories
 816                         if ( strpos( $file, $this->getName() ) !== false ) {
 817                                 $purgeList[] = "{$dir}/{$file}";
 818                         }
 819                 }
 820
 821                 # Delete the thumbnails
 822                 $this->repo->quickPurgeBatch( $purgeList );
 823                 # Clear out the thumbnail directory if empty
 824                 $this->repo->quickCleanDir( $dir );
 825         }
 826
 827         /** purgeDescription inherited */
 828         /** purgeEverything inherited */
 829
 830         /**
 831          * @param $limit null
 832          * @param $start null
 833          * @param $end null
 834          * @param $inc bool
 835          * @return array
 836          */
 837         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
 838                 $dbr = $this->repo->getSlaveDB();
 839                 $tables = array( 'oldimage' );
 840                 $fields = OldLocalFile::selectFields();
 841                 $conds = $opts = $join_conds = array();
 842                 $eq = $inc ? '=' : '';
 843                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
 844
 845                 if ( $start ) {
 846                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
 847                 }
 848
 849                 if ( $end ) {
 850                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
 851                 }
 852
 853                 if ( $limit ) {
 854                         $opts['LIMIT'] = $limit;
 855                 }
 856
 857                 // Search backwards for time > x queries
 858                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
 859                 $opts['ORDER BY'] = "oi_timestamp $order";
 860                 $opts['USE INDEX'] = array( 'oldimage' => 'oi_name_timestamp' );
 861
 862                 wfRunHooks( 'LocalFile::getHistory', array( &$this, &$tables, &$fields,
 863                         &$conds, &$opts, &$join_conds ) );
 864
 865                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
 866                 $r = array();
 867
 868                 foreach ( $res as $row ) {
 869                         if ( $this->repo->oldFileFromRowFactory ) {
 870                                 $r[] = call_user_func( $this->repo->oldFileFromRowFactory, $row, $this->repo );
 871                         } else {
 872                                 $r[] = OldLocalFile::newFromRow( $row, $this->repo );
 873                         }
 874                 }
 875
 876                 if ( $order == 'ASC' ) {
 877                         $r = array_reverse( $r ); // make sure it ends up descending
 878                 }
 879
 880                 return $r;
 881         }
 882
 883         /**
 884          * Return the history of this file, line by line.
 885          * starts with current version, then old versions.
 886          * uses $this->historyLine to check which line to return:
 887          *  0      return line for current version
 888          *  1      query for old versions, return first one
 889          *  2, ... return next old version from above query
 890          * @return bool
 891          */
 892         public function nextHistoryLine() {
 893                 # Polymorphic function name to distinguish foreign and local fetches
 894                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 895
 896                 $dbr = $this->repo->getSlaveDB();
 897
 898                 if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
 899                         $this->historyRes = $dbr->select( 'image',
 900                                 array(
 901                                         '*',
 902                                         "'' AS oi_archive_name",
 903                                         '0 as oi_deleted',
 904                                         'img_sha1'
 905                                 ),
 906                                 array( 'img_name' => $this->title->getDBkey() ),
 907                                 $fname
 908                         );
 909
 910                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
 911                                 $this->historyRes = null;
 912                                 return false;
 913                         }
 914                 } elseif ( $this->historyLine == 1 ) {
 915                         $this->historyRes = $dbr->select( 'oldimage', '*',
 916                                 array( 'oi_name' => $this->title->getDBkey() ),
 917                                 $fname,
 918                                 array( 'ORDER BY' => 'oi_timestamp DESC' )
 919                         );
 920                 }
 921                 $this->historyLine ++;
 922
 923                 return $dbr->fetchObject( $this->historyRes );
 924         }
 925
 926         /**
 927          * Reset the history pointer to the first element of the history
 928          */
 929         public function resetHistory() {
 930                 $this->historyLine = 0;
 931
 932                 if ( !is_null( $this->historyRes ) ) {
 933                         $this->historyRes = null;
 934                 }
 935         }
 936
 937         /** getHashPath inherited */
 938         /** getRel inherited */
 939         /** getUrlRel inherited */
 940         /** getArchiveRel inherited */
 941         /** getArchivePath inherited */
 942         /** getThumbPath inherited */
 943         /** getArchiveUrl inherited */
 944         /** getThumbUrl inherited */
 945         /** getArchiveVirtualUrl inherited */
 946         /** getThumbVirtualUrl inherited */
 947         /** isHashed inherited */
 948
 949         /**
 950          * Upload a file and record it in the DB
 951          * @param $srcPath String: source storage path or virtual URL
 952          * @param $comment String: upload description
 953          * @param $pageText String: text to use for the new description page,
 954          *                  if a new description page is created
 955          * @param $flags Integer|bool: flags for publish()
 956          * @param $props Array|bool: File properties, if known. This can be used to reduce the
 957          *               upload time when uploading virtual URLs for which the file info
 958          *               is already known
 959          * @param $timestamp String|bool: timestamp for img_timestamp, or false to use the current time
 960          * @param $user User|null: User object or null to use $wgUser
 961          *
 962          * @return FileRepoStatus object. On success, the value member contains the
 963          *     archive name, or an empty string if it was a new file.
 964          */
 965         function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false, $timestamp = false, $user = null ) {
 966                 global $wgContLang;
 967
 968                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
 969                         return $this->readOnlyFatalStatus();
 970                 }
 971
 972                 // truncate nicely or the DB will do it for us
 973                 // non-nicely (dangling multi-byte chars, non-truncated version in cache).
 974                 $comment = $wgContLang->truncate( $comment, 255 );
 975                 $this->lock(); // begin
 976                 $status = $this->publish( $srcPath, $flags );
 977
 978                 if ( $status->successCount > 0 ) {
 979                         # Essentially we are displacing any existing current file and saving
 980                         # a new current file at the old location. If just the first succeeded,
 981                         # we still need to displace the current DB entry and put in a new one.
 982                         if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp, $user ) ) {
 983                                 $status->fatal( 'filenotfound', $srcPath );
 984                         }
 985                 }
 986
 987                 $this->unlock(); // done
 988
 989                 return $status;
 990         }
 991
 992         /**
 993          * Record a file upload in the upload log and the image table
 994          * @param $oldver
 995          * @param $desc string
 996          * @param $license string
 997          * @param $copyStatus string
 998          * @param $source string
 999          * @param $watch bool
1000          * @param $timestamp string|bool
1001          * @return bool
1002          */
1003         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
1004                 $watch = false, $timestamp = false )
1005         {
1006                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
1007
1008                 if ( !$this->recordUpload2( $oldver, $desc, $pageText ) ) {
1009                         return false;
1010                 }
1011
1012                 if ( $watch ) {
1013                         global $wgUser;
1014                         $wgUser->addWatch( $this->getTitle() );
1015                 }
1016                 return true;
1017         }
1018
1019         /**
1020          * Record a file upload in the upload log and the image table
1021          * @param $oldver
1022          * @param $comment string
1023          * @param $pageText string
1024          * @param $props bool|array
1025          * @param $timestamp bool|string
1026          * @param $user null|User
1027          * @return bool
1028          */
1029         function recordUpload2(
1030                 $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null
1031         ) {
1032                 wfProfileIn( __METHOD__ );
1033
1034                 if ( is_null( $user ) ) {
1035                         global $wgUser;
1036                         $user = $wgUser;
1037                 }
1038
1039                 $dbw = $this->repo->getMasterDB();
1040                 $dbw->begin( __METHOD__ );
1041
1042                 if ( !$props ) {
1043                         wfProfileIn( __METHOD__ . '-getProps' );
1044                         $props = $this->repo->getFileProps( $this->getVirtualUrl() );
1045                         wfProfileOut( __METHOD__ . -'getProps' );
1046                 }
1047
1048                 if ( $timestamp === false ) {
1049                         $timestamp = $dbw->timestamp();
1050                 }
1051
1052                 $props['description'] = $comment;
1053                 $props['user'] = $user->getId();
1054                 $props['user_text'] = $user->getName();
1055                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1056                 $this->setProps( $props );
1057
1058                 # Fail now if the file isn't there
1059                 if ( !$this->fileExists ) {
1060                         wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
1061                         wfProfileOut( __METHOD__ );
1062                         return false;
1063                 }
1064
1065                 $reupload = false;
1066
1067                 # Test to see if the row exists using INSERT IGNORE
1068                 # This avoids race conditions by locking the row until the commit, and also
1069                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
1070                 $dbw->insert( 'image',
1071                         array(
1072                                 'img_name'        => $this->getName(),
1073                                 'img_size'        => $this->size,
1074                                 'img_width'       => intval( $this->width ),
1075                                 'img_height'      => intval( $this->height ),
1076                                 'img_bits'        => $this->bits,
1077                                 'img_media_type'  => $this->media_type,
1078                                 'img_major_mime'  => $this->major_mime,
1079                                 'img_minor_mime'  => $this->minor_mime,
1080                                 'img_timestamp'   => $timestamp,
1081                                 'img_description' => $comment,
1082                                 'img_user'        => $user->getId(),
1083                                 'img_user_text'   => $user->getName(),
1084                                 'img_metadata'    => $this->metadata,
1085                                 'img_sha1'        => $this->sha1
1086                         ),
1087                         __METHOD__,
1088                         'IGNORE'
1089                 );
1090                 if ( $dbw->affectedRows() == 0 ) {
1091                         # (bug 34993) Note: $oldver can be empty here, if the previous
1092                         # version of the file was broken. Allow registration of the new
1093                         # version to continue anyway, because that's better than having
1094                         # an image that's not fixable by user operations.
1095
1096                         $reupload = true;
1097                         # Collision, this is an update of a file
1098                         # Insert previous contents into oldimage
1099                         $dbw->insertSelect( 'oldimage', 'image',
1100                                 array(
1101                                         'oi_name'         => 'img_name',
1102                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1103                                         'oi_size'         => 'img_size',
1104                                         'oi_width'        => 'img_width',
1105                                         'oi_height'       => 'img_height',
1106                                         'oi_bits'         => 'img_bits',
1107                                         'oi_timestamp'    => 'img_timestamp',
1108                                         'oi_description'  => 'img_description',
1109                                         'oi_user'         => 'img_user',
1110                                         'oi_user_text'    => 'img_user_text',
1111                                         'oi_metadata'     => 'img_metadata',
1112                                         'oi_media_type'   => 'img_media_type',
1113                                         'oi_major_mime'   => 'img_major_mime',
1114                                         'oi_minor_mime'   => 'img_minor_mime',
1115                                         'oi_sha1'         => 'img_sha1'
1116                                 ),
1117                                 array( 'img_name' => $this->getName() ),
1118                                 __METHOD__
1119                         );
1120
1121                         # Update the current image row
1122                         $dbw->update( 'image',
1123                                 array( /* SET */
1124                                         'img_size'        => $this->size,
1125                                         'img_width'       => intval( $this->width ),
1126                                         'img_height'      => intval( $this->height ),
1127                                         'img_bits'        => $this->bits,
1128                                         'img_media_type'  => $this->media_type,
1129                                         'img_major_mime'  => $this->major_mime,
1130                                         'img_minor_mime'  => $this->minor_mime,
1131                                         'img_timestamp'   => $timestamp,
1132                                         'img_description' => $comment,
1133                                         'img_user'        => $user->getId(),
1134                                         'img_user_text'   => $user->getName(),
1135                                         'img_metadata'    => $this->metadata,
1136                                         'img_sha1'        => $this->sha1
1137                                 ),
1138                                 array( 'img_name' => $this->getName() ),
1139                                 __METHOD__
1140                         );
1141                 } else {
1142                         # This is a new file, so update the image count
1143                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
1144                 }
1145
1146                 $descTitle = $this->getTitle();
1147                 $wikiPage = new WikiFilePage( $descTitle );
1148                 $wikiPage->setFile( $this );
1149
1150                 # Add the log entry
1151                 $log = new LogPage( 'upload' );
1152                 $action = $reupload ? 'overwrite' : 'upload';
1153                 $log->addEntry( $action, $descTitle, $comment, array(), $user );
1154
1155                 wfProfileIn( __METHOD__ . '-edit' );
1156                 if ( $descTitle->exists() ) {
1157                         # Create a null revision
1158                         $latest = $descTitle->getLatestRevID();
1159                         $nullRevision = Revision::newNullRevision(
1160                                 $dbw,
1161                                 $descTitle->getArticleID(),
1162                                 $log->getRcComment(),
1163                                 false
1164                         );
1165                         if (!is_null($nullRevision)) {
1166                                 $nullRevision->insertOn( $dbw );
1167
1168                                 wfRunHooks( 'NewRevisionFromEditComplete', array( $wikiPage, $nullRevision, $latest, $user ) );
1169                                 $wikiPage->updateRevisionOn( $dbw, $nullRevision );
1170                         }
1171                         # Invalidate the cache for the description page
1172                         $descTitle->invalidateCache();
1173                         $descTitle->purgeSquid();
1174                 } else {
1175                         # New file; create the description page.
1176                         # There's already a log entry, so don't make a second RC entry
1177                         # Squid and file cache for the description page are purged by doEdit.
1178                         $wikiPage->doEdit( $pageText, $comment, EDIT_NEW | EDIT_SUPPRESS_RC, false, $user );
1179                 }
1180                 wfProfileOut( __METHOD__ . '-edit' );
1181
1182                 # Commit the transaction now, in case something goes wrong later
1183                 # The most important thing is that files don't get lost, especially archives
1184                 $dbw->commit( __METHOD__ );
1185
1186                 # Save to cache and purge the squid
1187                 # We shall not saveToCache before the commit since otherwise
1188                 # in case of a rollback there is an usable file from memcached
1189                 # which in fact doesn't really exist (bug 24978)
1190                 $this->saveToCache();
1191
1192                 if ( $reupload ) {
1193                         # Delete old thumbnails
1194                         wfProfileIn( __METHOD__ . '-purge' );
1195                         $this->purgeThumbnails();
1196                         wfProfileOut( __METHOD__ . '-purge' );
1197
1198                         # Remove the old file from the squid cache
1199                         SquidUpdate::purge( array( $this->getURL() ) );
1200                 }
1201
1202                 # Hooks, hooks, the magic of hooks...
1203                 wfProfileIn( __METHOD__ . '-hooks' );
1204                 wfRunHooks( 'FileUpload', array( $this, $reupload, $descTitle->exists() ) );
1205                 wfProfileOut( __METHOD__ . '-hooks' );
1206
1207                 # Invalidate cache for all pages using this file
1208                 $update = new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' );
1209                 $update->doUpdate();
1210
1211                 # Invalidate cache for all pages that redirects on this page
1212                 $redirs = $this->getTitle()->getRedirectsHere();
1213
1214                 foreach ( $redirs as $redir ) {
1215                         $update = new HTMLCacheUpdate( $redir, 'imagelinks' );
1216                         $update->doUpdate();
1217                 }
1218
1219                 wfProfileOut( __METHOD__ );
1220                 return true;
1221         }
1222
1223         /**
1224          * Move or copy a file to its public location. If a file exists at the
1225          * destination, move it to an archive. Returns a FileRepoStatus object with
1226          * the archive name in the "value" member on success.
1227          *
1228          * The archive name should be passed through to recordUpload for database
1229          * registration.
1230          *
1231          * @param $srcPath String: local filesystem path to the source image
1232          * @param $flags Integer: a bitwise combination of:
1233          *     File::DELETE_SOURCE      Delete the source file, i.e. move rather than copy
1234          * @return FileRepoStatus object. On success, the value member contains the
1235          *     archive name, or an empty string if it was a new file.
1236          */
1237         function publish( $srcPath, $flags = 0 ) {
1238                 return $this->publishTo( $srcPath, $this->getRel(), $flags );
1239         }
1240
1241         /**
1242          * Move or copy a file to a specified location. Returns a FileRepoStatus
1243          * object with the archive name in the "value" member on success.
1244          *
1245          * The archive name should be passed through to recordUpload for database
1246          * registration.
1247          *
1248          * @param $srcPath String: local filesystem path to the source image
1249          * @param $dstRel String: target relative path
1250          * @param $flags Integer: a bitwise combination of:
1251          *     File::DELETE_SOURCE      Delete the source file, i.e. move rather than copy
1252          * @return FileRepoStatus object. On success, the value member contains the
1253          *     archive name, or an empty string if it was a new file.
1254          */
1255         function publishTo( $srcPath, $dstRel, $flags = 0 ) {
1256                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1257                         return $this->readOnlyFatalStatus();
1258                 }
1259
1260                 $this->lock(); // begin
1261
1262                 $archiveName = wfTimestamp( TS_MW ) . '!'. $this->getName();
1263                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1264                 $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1265                 $status = $this->repo->publish( $srcPath, $dstRel, $archiveRel, $flags );
1266
1267                 if ( $status->value == 'new' ) {
1268                         $status->value = '';
1269                 } else {
1270                         $status->value = $archiveName;
1271                 }
1272
1273                 $this->unlock(); // done
1274
1275                 return $status;
1276         }
1277
1278         /** getLinksTo inherited */
1279         /** getExifData inherited */
1280         /** isLocal inherited */
1281         /** wasDeleted inherited */
1282
1283         /**
1284          * Move file to the new title
1285          *
1286          * Move current, old version and all thumbnails
1287          * to the new filename. Old file is deleted.
1288          *
1289          * Cache purging is done; checks for validity
1290          * and logging are caller's responsibility
1291          *
1292          * @param $target Title New file name
1293          * @return FileRepoStatus object.
1294          */
1295         function move( $target ) {
1296                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1297                         return $this->readOnlyFatalStatus();
1298                 }
1299
1300                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1301                 $batch = new LocalFileMoveBatch( $this, $target );
1302
1303                 $this->lock(); // begin
1304                 $batch->addCurrent();
1305                 $archiveNames = $batch->addOlds();
1306                 $status = $batch->execute();
1307                 $this->unlock(); // done
1308
1309                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1310
1311                 $this->purgeEverything();
1312                 foreach ( $archiveNames as $archiveName ) {
1313                         $this->purgeOldThumbnails( $archiveName );
1314                 }
1315                 if ( $status->isOK() ) {
1316                         // Now switch the object
1317                         $this->title = $target;
1318                         // Force regeneration of the name and hashpath
1319                         unset( $this->name );
1320                         unset( $this->hashPath );
1321                         // Purge the new image
1322                         $this->purgeEverything();
1323                 }
1324
1325                 return $status;
1326         }
1327
1328         /**
1329          * Delete all versions of the file.
1330          *
1331          * Moves the files into an archive directory (or deletes them)
1332          * and removes the database rows.
1333          *
1334          * Cache purging is done; logging is caller's responsibility.
1335          *
1336          * @param $reason
1337          * @param $suppress
1338          * @return FileRepoStatus object.
1339          */
1340         function delete( $reason, $suppress = false ) {
1341                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1342                         return $this->readOnlyFatalStatus();
1343                 }
1344
1345                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1346
1347                 $this->lock(); // begin
1348                 $batch->addCurrent();
1349                 # Get old version relative paths
1350                 $archiveNames = $batch->addOlds();
1351                 $status = $batch->execute();
1352                 $this->unlock(); // done
1353
1354                 if ( $status->isOK() ) {
1355                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => -1 ) ) );
1356                 }
1357
1358                 $this->purgeEverything();
1359                 foreach ( $archiveNames as $archiveName ) {
1360                         $this->purgeOldThumbnails( $archiveName );
1361                 }
1362
1363                 return $status;
1364         }
1365
1366         /**
1367          * Delete an old version of the file.
1368          *
1369          * Moves the file into an archive directory (or deletes it)
1370          * and removes the database row.
1371          *
1372          * Cache purging is done; logging is caller's responsibility.
1373          *
1374          * @param $archiveName String
1375          * @param $reason String
1376          * @param $suppress Boolean
1377          * @throws MWException or FSException on database or file store failure
1378          * @return FileRepoStatus object.
1379          */
1380         function deleteOld( $archiveName, $reason, $suppress = false ) {
1381                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1382                         return $this->readOnlyFatalStatus();
1383                 }
1384
1385                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1386
1387                 $this->lock(); // begin
1388                 $batch->addOld( $archiveName );
1389                 $status = $batch->execute();
1390                 $this->unlock(); // done
1391
1392                 $this->purgeOldThumbnails( $archiveName );
1393                 if ( $status->isOK() ) {
1394                         $this->purgeDescription();
1395                         $this->purgeHistory();
1396                 }
1397
1398                 return $status;
1399         }
1400
1401         /**
1402          * Restore all or specified deleted revisions to the given file.
1403          * Permissions and logging are left to the caller.
1404          *
1405          * May throw database exceptions on error.
1406          *
1407          * @param $versions array set of record ids of deleted items to restore,
1408          *                    or empty to restore all revisions.
1409          * @param $unsuppress Boolean
1410          * @return FileRepoStatus
1411          */
1412         function restore( $versions = array(), $unsuppress = false ) {
1413                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1414                         return $this->readOnlyFatalStatus();
1415                 }
1416
1417                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1418
1419                 $this->lock(); // begin
1420                 if ( !$versions ) {
1421                         $batch->addAll();
1422                 } else {
1423                         $batch->addIds( $versions );
1424                 }
1425                 $status = $batch->execute();
1426                 if ( $status->isGood() ) {
1427                         $cleanupStatus = $batch->cleanup();
1428                         $cleanupStatus->successCount = 0;
1429                         $cleanupStatus->failCount = 0;
1430                         $status->merge( $cleanupStatus );
1431                 }
1432                 $this->unlock(); // done
1433
1434                 return $status;
1435         }
1436
1437         /** isMultipage inherited */
1438         /** pageCount inherited */
1439         /** scaleHeight inherited */
1440         /** getImageSize inherited */
1441
1442         /**
1443          * Get the URL of the file description page.
1444          * @return String
1445          */
1446         function getDescriptionUrl() {
1447                 return $this->title->getLocalUrl();
1448         }
1449
1450         /**
1451          * Get the HTML text of the description page
1452          * This is not used by ImagePage for local files, since (among other things)
1453          * it skips the parser cache.
1454          * @return bool|mixed
1455          */
1456         function getDescriptionText() {
1457                 global $wgParser;
1458                 $revision = Revision::newFromTitle( $this->title );
1459                 if ( !$revision ) return false;
1460                 $text = $revision->getText();
1461                 if ( !$text ) return false;
1462                 $pout = $wgParser->parse( $text, $this->title, new ParserOptions() );
1463                 return $pout->getText();
1464         }
1465
1466         /**
1467          * @return string
1468          */
1469         function getDescription() {
1470                 $this->load();
1471                 return $this->description;
1472         }
1473
1474         /**
1475          * @return bool|string
1476          */
1477         function getTimestamp() {
1478                 $this->load();
1479                 return $this->timestamp;
1480         }
1481
1482         /**
1483          * @return string
1484          */
1485         function getSha1() {
1486                 $this->load();
1487                 // Initialise now if necessary
1488                 if ( $this->sha1 == '' && $this->fileExists ) {
1489                         $this->lock(); // begin
1490
1491                         $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
1492                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1493                                 $dbw = $this->repo->getMasterDB();
1494                                 $dbw->update( 'image',
1495                                         array( 'img_sha1' => $this->sha1 ),
1496                                         array( 'img_name' => $this->getName() ),
1497                                         __METHOD__ );
1498                                 $this->saveToCache();
1499                         }
1500
1501                         $this->unlock(); // done
1502                 }
1503
1504                 return $this->sha1;
1505         }
1506
1507         /**
1508          * @return bool
1509          */
1510         function isCacheable() {
1511                 $this->load();
1512                 return strlen( $this->metadata ) <= self::CACHE_FIELD_MAX_LEN; // avoid OOMs
1513         }
1514
1515         /**
1516          * Start a transaction and lock the image for update
1517          * Increments a reference counter if the lock is already held
1518          * @return boolean True if the image exists, false otherwise
1519          */
1520         function lock() {
1521                 $dbw = $this->repo->getMasterDB();
1522
1523                 if ( !$this->locked ) {
1524                         $dbw->begin( __METHOD__ );
1525                         $this->locked++;
1526                 }
1527
1528                 return $dbw->selectField( 'image', '1',
1529                         array( 'img_name' => $this->getName() ), __METHOD__, array( 'FOR UPDATE' ) );
1530         }
1531
1532         /**
1533          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1534          * the transaction and thereby releases the image lock.
1535          */
1536         function unlock() {
1537                 if ( $this->locked ) {
1538                         --$this->locked;
1539                         if ( !$this->locked ) {
1540                                 $dbw = $this->repo->getMasterDB();
1541                                 $dbw->commit( __METHOD__ );
1542                         }
1543                 }
1544         }
1545
1546         /**
1547          * Roll back the DB transaction and mark the image unlocked
1548          */
1549         function unlockAndRollback() {
1550                 $this->locked = false;
1551                 $dbw = $this->repo->getMasterDB();
1552                 $dbw->rollback( __METHOD__ );
1553         }
1554
1555         /**
1556          * @return Status
1557          */
1558         protected function readOnlyFatalStatus() {
1559                 return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
1560                         $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
1561         }
1562 } // LocalFile class
1563
1564 # ------------------------------------------------------------------------------
1565
1566 /**
1567  * Helper class for file deletion
1568  * @ingroup FileAbstraction
1569  */
1570 class LocalFileDeleteBatch {
1571
1572         /**
1573          * @var LocalFile
1574          */
1575         var $file;
1576
1577         var $reason, $srcRels = array(), $archiveUrls = array(), $deletionBatch, $suppress;
1578         var $status;
1579
1580         /**
1581          * @param $file File
1582          * @param $reason string
1583          * @param $suppress bool
1584          */
1585         function __construct( File $file, $reason = '', $suppress = false ) {
1586                 $this->file = $file;
1587                 $this->reason = $reason;
1588                 $this->suppress = $suppress;
1589                 $this->status = $file->repo->newGood();
1590         }
1591
1592         function addCurrent() {
1593                 $this->srcRels['.'] = $this->file->getRel();
1594         }
1595
1596         /**
1597          * @param $oldName string
1598          */
1599         function addOld( $oldName ) {
1600                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
1601                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
1602         }
1603
1604         /**
1605          * Add the old versions of the image to the batch
1606          * @return Array List of archive names from old versions
1607          */
1608         function addOlds() {
1609                 $archiveNames = array();
1610
1611                 $dbw = $this->file->repo->getMasterDB();
1612                 $result = $dbw->select( 'oldimage',
1613                         array( 'oi_archive_name' ),
1614                         array( 'oi_name' => $this->file->getName() ),
1615                         __METHOD__
1616                 );
1617
1618                 foreach ( $result as $row ) {
1619                         $this->addOld( $row->oi_archive_name );
1620                         $archiveNames[] = $row->oi_archive_name;
1621                 }
1622
1623                 return $archiveNames;
1624         }
1625
1626         /**
1627          * @return array
1628          */
1629         function getOldRels() {
1630                 if ( !isset( $this->srcRels['.'] ) ) {
1631                         $oldRels =& $this->srcRels;
1632                         $deleteCurrent = false;
1633                 } else {
1634                         $oldRels = $this->srcRels;
1635                         unset( $oldRels['.'] );
1636                         $deleteCurrent = true;
1637                 }
1638
1639                 return array( $oldRels, $deleteCurrent );
1640         }
1641
1642         /**
1643          * @return array
1644          */
1645         protected function getHashes() {
1646                 $hashes = array();
1647                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1648
1649                 if ( $deleteCurrent ) {
1650                         $hashes['.'] = $this->file->getSha1();
1651                 }
1652
1653                 if ( count( $oldRels ) ) {
1654                         $dbw = $this->file->repo->getMasterDB();
1655                         $res = $dbw->select(
1656                                 'oldimage',
1657                                 array( 'oi_archive_name', 'oi_sha1' ),
1658                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1659                                 __METHOD__
1660                         );
1661
1662                         foreach ( $res as $row ) {
1663                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
1664                                         // Get the hash from the file
1665                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
1666                                         $props = $this->file->repo->getFileProps( $oldUrl );
1667
1668                                         if ( $props['fileExists'] ) {
1669                                                 // Upgrade the oldimage row
1670                                                 $dbw->update( 'oldimage',
1671                                                         array( 'oi_sha1' => $props['sha1'] ),
1672                                                         array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ),
1673                                                         __METHOD__ );
1674                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
1675                                         } else {
1676                                                 $hashes[$row->oi_archive_name] = false;
1677                                         }
1678                                 } else {
1679                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
1680                                 }
1681                         }
1682                 }
1683
1684                 $missing = array_diff_key( $this->srcRels, $hashes );
1685
1686                 foreach ( $missing as $name => $rel ) {
1687                         $this->status->error( 'filedelete-old-unregistered', $name );
1688                 }
1689
1690                 foreach ( $hashes as $name => $hash ) {
1691                         if ( !$hash ) {
1692                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
1693                                 unset( $hashes[$name] );
1694                         }
1695                 }
1696
1697                 return $hashes;
1698         }
1699
1700         function doDBInserts() {
1701                 global $wgUser;
1702
1703                 $dbw = $this->file->repo->getMasterDB();
1704                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
1705                 $encUserId = $dbw->addQuotes( $wgUser->getId() );
1706                 $encReason = $dbw->addQuotes( $this->reason );
1707                 $encGroup = $dbw->addQuotes( 'deleted' );
1708                 $ext = $this->file->getExtension();
1709                 $dotExt = $ext === '' ? '' : ".$ext";
1710                 $encExt = $dbw->addQuotes( $dotExt );
1711                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1712
1713                 // Bitfields to further suppress the content
1714                 if ( $this->suppress ) {
1715                         $bitfield = 0;
1716                         // This should be 15...
1717                         $bitfield |= Revision::DELETED_TEXT;
1718                         $bitfield |= Revision::DELETED_COMMENT;
1719                         $bitfield |= Revision::DELETED_USER;
1720                         $bitfield |= Revision::DELETED_RESTRICTED;
1721                 } else {
1722                         $bitfield = 'oi_deleted';
1723                 }
1724
1725                 if ( $deleteCurrent ) {
1726                         $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) );
1727                         $where = array( 'img_name' => $this->file->getName() );
1728                         $dbw->insertSelect( 'filearchive', 'image',
1729                                 array(
1730                                         'fa_storage_group' => $encGroup,
1731                                         'fa_storage_key'   => "CASE WHEN img_sha1='' THEN '' ELSE $concat END",
1732                                         'fa_deleted_user'      => $encUserId,
1733                                         'fa_deleted_timestamp' => $encTimestamp,
1734                                         'fa_deleted_reason'    => $encReason,
1735                                         'fa_deleted'               => $this->suppress ? $bitfield : 0,
1736
1737                                         'fa_name'         => 'img_name',
1738                                         'fa_archive_name' => 'NULL',
1739                                         'fa_size'         => 'img_size',
1740                                         'fa_width'        => 'img_width',
1741                                         'fa_height'       => 'img_height',
1742                                         'fa_metadata'     => 'img_metadata',
1743                                         'fa_bits'         => 'img_bits',
1744                                         'fa_media_type'   => 'img_media_type',
1745                                         'fa_major_mime'   => 'img_major_mime',
1746                                         'fa_minor_mime'   => 'img_minor_mime',
1747                                         'fa_description'  => 'img_description',
1748                                         'fa_user'         => 'img_user',
1749                                         'fa_user_text'    => 'img_user_text',
1750                                         'fa_timestamp'    => 'img_timestamp'
1751                                 ), $where, __METHOD__ );
1752                 }
1753
1754                 if ( count( $oldRels ) ) {
1755                         $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) );
1756                         $where = array(
1757                                 'oi_name' => $this->file->getName(),
1758                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')' );
1759                         $dbw->insertSelect( 'filearchive', 'oldimage',
1760                                 array(
1761                                         'fa_storage_group' => $encGroup,
1762                                         'fa_storage_key'   => "CASE WHEN oi_sha1='' THEN '' ELSE $concat END",
1763                                         'fa_deleted_user'      => $encUserId,
1764                                         'fa_deleted_timestamp' => $encTimestamp,
1765                                         'fa_deleted_reason'    => $encReason,
1766                                         'fa_deleted'           => $this->suppress ? $bitfield : 'oi_deleted',
1767
1768                                         'fa_name'         => 'oi_name',
1769                                         'fa_archive_name' => 'oi_archive_name',
1770                                         'fa_size'         => 'oi_size',
1771                                         'fa_width'        => 'oi_width',
1772                                         'fa_height'       => 'oi_height',
1773                                         'fa_metadata'     => 'oi_metadata',
1774                                         'fa_bits'         => 'oi_bits',
1775                                         'fa_media_type'   => 'oi_media_type',
1776                                         'fa_major_mime'   => 'oi_major_mime',
1777                                         'fa_minor_mime'   => 'oi_minor_mime',
1778                                         'fa_description'  => 'oi_description',
1779                                         'fa_user'         => 'oi_user',
1780                                         'fa_user_text'    => 'oi_user_text',
1781                                         'fa_timestamp'    => 'oi_timestamp',
1782                                 ), $where, __METHOD__ );
1783                 }
1784         }
1785
1786         function doDBDeletes() {
1787                 $dbw = $this->file->repo->getMasterDB();
1788                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1789
1790                 if ( count( $oldRels ) ) {
1791                         $dbw->delete( 'oldimage',
1792                                 array(
1793                                         'oi_name' => $this->file->getName(),
1794                                         'oi_archive_name' => array_keys( $oldRels )
1795                                 ), __METHOD__ );
1796                 }
1797
1798                 if ( $deleteCurrent ) {
1799                         $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ );
1800                 }
1801         }
1802
1803         /**
1804          * Run the transaction
1805          * @return FileRepoStatus
1806          */
1807         function execute() {
1808                 global $wgUseSquid;
1809                 wfProfileIn( __METHOD__ );
1810
1811                 $this->file->lock();
1812                 // Leave private files alone
1813                 $privateFiles = array();
1814                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1815                 $dbw = $this->file->repo->getMasterDB();
1816
1817                 if ( !empty( $oldRels ) ) {
1818                         $res = $dbw->select( 'oldimage',
1819                                 array( 'oi_archive_name' ),
1820                                 array( 'oi_name' => $this->file->getName(),
1821                                         'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1822                                         $dbw->bitAnd( 'oi_deleted', File::DELETED_FILE ) => File::DELETED_FILE ),
1823                                 __METHOD__ );
1824
1825                         foreach ( $res as $row ) {
1826                                 $privateFiles[$row->oi_archive_name] = 1;
1827                         }
1828                 }
1829                 // Prepare deletion batch
1830                 $hashes = $this->getHashes();
1831                 $this->deletionBatch = array();
1832                 $ext = $this->file->getExtension();
1833                 $dotExt = $ext === '' ? '' : ".$ext";
1834
1835                 foreach ( $this->srcRels as $name => $srcRel ) {
1836                         // Skip files that have no hash (missing source).
1837                         // Keep private files where they are.
1838                         if ( isset( $hashes[$name] ) && !array_key_exists( $name, $privateFiles ) ) {
1839                                 $hash = $hashes[$name];
1840                                 $key = $hash . $dotExt;
1841                                 $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1842                                 $this->deletionBatch[$name] = array( $srcRel, $dstRel );
1843                         }
1844                 }
1845
1846                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
1847                 // We acquire this lock by running the inserts now, before the file operations.
1848                 //
1849                 // This potentially has poor lock contention characteristics -- an alternative
1850                 // scheme would be to insert stub filearchive entries with no fa_name and commit
1851                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
1852                 $this->doDBInserts();
1853
1854                 // Removes non-existent file from the batch, so we don't get errors.
1855                 $this->deletionBatch = $this->removeNonexistentFiles( $this->deletionBatch );
1856
1857                 // Execute the file deletion batch
1858                 $status = $this->file->repo->deleteBatch( $this->deletionBatch );
1859
1860                 if ( !$status->isGood() ) {
1861                         $this->status->merge( $status );
1862                 }
1863
1864                 if ( !$this->status->isOK() ) {
1865                         // Critical file deletion error
1866                         // Roll back inserts, release lock and abort
1867                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
1868                         $this->file->unlockAndRollback();
1869                         wfProfileOut( __METHOD__ );
1870                         return $this->status;
1871                 }
1872
1873                 // Delete image/oldimage rows
1874                 $this->doDBDeletes();
1875
1876                 // Commit and return
1877                 $this->file->unlock();
1878                 wfProfileOut( __METHOD__ );
1879
1880                 return $this->status;
1881         }
1882
1883         /**
1884          * Removes non-existent files from a deletion batch.
1885          * @param $batch array
1886          * @return array
1887          */
1888         function removeNonexistentFiles( $batch ) {
1889                 $files = $newBatch = array();
1890
1891                 foreach ( $batch as $batchItem ) {
1892                         list( $src, $dest ) = $batchItem;
1893                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
1894                 }
1895
1896                 $result = $this->file->repo->fileExistsBatch( $files );
1897
1898                 foreach ( $batch as $batchItem ) {
1899                         if ( $result[$batchItem[0]] ) {
1900                                 $newBatch[] = $batchItem;
1901                         }
1902                 }
1903
1904                 return $newBatch;
1905         }
1906 }
1907
1908 # ------------------------------------------------------------------------------
1909
1910 /**
1911  * Helper class for file undeletion
1912  * @ingroup FileAbstraction
1913  */
1914 class LocalFileRestoreBatch {
1915         /**
1916          * @var LocalFile
1917          */
1918         var $file;
1919
1920         var $cleanupBatch, $ids, $all, $unsuppress = false;
1921
1922         /**
1923          * @param $file File
1924          * @param $unsuppress bool
1925          */
1926         function __construct( File $file, $unsuppress = false ) {
1927                 $this->file = $file;
1928                 $this->cleanupBatch = $this->ids = array();
1929                 $this->ids = array();
1930                 $this->unsuppress = $unsuppress;
1931         }
1932
1933         /**
1934          * Add a file by ID
1935          */
1936         function addId( $fa_id ) {
1937                 $this->ids[] = $fa_id;
1938         }
1939
1940         /**
1941          * Add a whole lot of files by ID
1942          */
1943         function addIds( $ids ) {
1944                 $this->ids = array_merge( $this->ids, $ids );
1945         }
1946
1947         /**
1948          * Add all revisions of the file
1949          */
1950         function addAll() {
1951                 $this->all = true;
1952         }
1953
1954         /**
1955          * Run the transaction, except the cleanup batch.
1956          * The cleanup batch should be run in a separate transaction, because it locks different
1957          * rows and there's no need to keep the image row locked while it's acquiring those locks
1958          * The caller may have its own transaction open.
1959          * So we save the batch and let the caller call cleanup()
1960          * @return FileRepoStatus
1961          */
1962         function execute() {
1963                 global $wgLang;
1964
1965                 if ( !$this->all && !$this->ids ) {
1966                         // Do nothing
1967                         return $this->file->repo->newGood();
1968                 }
1969
1970                 $exists = $this->file->lock();
1971                 $dbw = $this->file->repo->getMasterDB();
1972                 $status = $this->file->repo->newGood();
1973
1974                 // Fetch all or selected archived revisions for the file,
1975                 // sorted from the most recent to the oldest.
1976                 $conditions = array( 'fa_name' => $this->file->getName() );
1977
1978                 if ( !$this->all ) {
1979                         $conditions[] = 'fa_id IN (' . $dbw->makeList( $this->ids ) . ')';
1980                 }
1981
1982                 $result = $dbw->select( 'filearchive', '*',
1983                         $conditions,
1984                         __METHOD__,
1985                         array( 'ORDER BY' => 'fa_timestamp DESC' )
1986                 );
1987
1988                 $idsPresent = array();
1989                 $storeBatch = array();
1990                 $insertBatch = array();
1991                 $insertCurrent = false;
1992                 $deleteIds = array();
1993                 $first = true;
1994                 $archiveNames = array();
1995
1996                 foreach ( $result as $row ) {
1997                         $idsPresent[] = $row->fa_id;
1998
1999                         if ( $row->fa_name != $this->file->getName() ) {
2000                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
2001                                 $status->failCount++;
2002                                 continue;
2003                         }
2004
2005                         if ( $row->fa_storage_key == '' ) {
2006                                 // Revision was missing pre-deletion
2007                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
2008                                 $status->failCount++;
2009                                 continue;
2010                         }
2011
2012                         $deletedRel = $this->file->repo->getDeletedHashPath( $row->fa_storage_key ) . $row->fa_storage_key;
2013                         $deletedUrl = $this->file->repo->getVirtualUrl() . '/deleted/' . $deletedRel;
2014
2015                         $sha1 = substr( $row->fa_storage_key, 0, strcspn( $row->fa_storage_key, '.' ) );
2016
2017                         # Fix leading zero
2018                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
2019                                 $sha1 = substr( $sha1, 1 );
2020                         }
2021
2022                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
2023                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
2024                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
2025                                 || is_null( $row->fa_metadata ) ) {
2026                                 // Refresh our metadata
2027                                 // Required for a new current revision; nice for older ones too. :)
2028                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
2029                         } else {
2030                                 $props = array(
2031                                         'minor_mime' => $row->fa_minor_mime,
2032                                         'major_mime' => $row->fa_major_mime,
2033                                         'media_type' => $row->fa_media_type,
2034                                         'metadata'   => $row->fa_metadata
2035                                 );
2036                         }
2037
2038                         if ( $first && !$exists ) {
2039                                 // This revision will be published as the new current version
2040                                 $destRel = $this->file->getRel();
2041                                 $insertCurrent = array(
2042                                         'img_name'        => $row->fa_name,
2043                                         'img_size'        => $row->fa_size,
2044                                         'img_width'       => $row->fa_width,
2045                                         'img_height'      => $row->fa_height,
2046                                         'img_metadata'    => $props['metadata'],
2047                                         'img_bits'        => $row->fa_bits,
2048                                         'img_media_type'  => $props['media_type'],
2049                                         'img_major_mime'  => $props['major_mime'],
2050                                         'img_minor_mime'  => $props['minor_mime'],
2051                                         'img_description' => $row->fa_description,
2052                                         'img_user'        => $row->fa_user,
2053                                         'img_user_text'   => $row->fa_user_text,
2054                                         'img_timestamp'   => $row->fa_timestamp,
2055                                         'img_sha1'        => $sha1
2056                                 );
2057
2058                                 // The live (current) version cannot be hidden!
2059                                 if ( !$this->unsuppress && $row->fa_deleted ) {
2060                                         $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2061                                         $this->cleanupBatch[] = $row->fa_storage_key;
2062                                 }
2063                         } else {
2064                                 $archiveName = $row->fa_archive_name;
2065
2066                                 if ( $archiveName == '' ) {
2067                                         // This was originally a current version; we
2068                                         // have to devise a new archive name for it.
2069                                         // Format is <timestamp of archiving>!<name>
2070                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
2071
2072                                         do {
2073                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
2074                                                 $timestamp++;
2075                                         } while ( isset( $archiveNames[$archiveName] ) );
2076                                 }
2077
2078                                 $archiveNames[$archiveName] = true;
2079                                 $destRel = $this->file->getArchiveRel( $archiveName );
2080                                 $insertBatch[] = array(
2081                                         'oi_name'         => $row->fa_name,
2082                                         'oi_archive_name' => $archiveName,
2083                                         'oi_size'         => $row->fa_size,
2084                                         'oi_width'        => $row->fa_width,
2085                                         'oi_height'       => $row->fa_height,
2086                                         'oi_bits'         => $row->fa_bits,
2087                                         'oi_description'  => $row->fa_description,
2088                                         'oi_user'         => $row->fa_user,
2089                                         'oi_user_text'    => $row->fa_user_text,
2090                                         'oi_timestamp'    => $row->fa_timestamp,
2091                                         'oi_metadata'     => $props['metadata'],
2092                                         'oi_media_type'   => $props['media_type'],
2093                                         'oi_major_mime'   => $props['major_mime'],
2094                                         'oi_minor_mime'   => $props['minor_mime'],
2095                                         'oi_deleted'      => $this->unsuppress ? 0 : $row->fa_deleted,
2096                                         'oi_sha1'         => $sha1 );
2097                         }
2098
2099                         $deleteIds[] = $row->fa_id;
2100
2101                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
2102                                 // private files can stay where they are
2103                                 $status->successCount++;
2104                         } else {
2105                                 $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2106                                 $this->cleanupBatch[] = $row->fa_storage_key;
2107                         }
2108
2109                         $first = false;
2110                 }
2111
2112                 unset( $result );
2113
2114                 // Add a warning to the status object for missing IDs
2115                 $missingIds = array_diff( $this->ids, $idsPresent );
2116
2117                 foreach ( $missingIds as $id ) {
2118                         $status->error( 'undelete-missing-filearchive', $id );
2119                 }
2120
2121                 // Remove missing files from batch, so we don't get errors when undeleting them
2122                 $storeBatch = $this->removeNonexistentFiles( $storeBatch );
2123
2124                 // Run the store batch
2125                 // Use the OVERWRITE_SAME flag to smooth over a common error
2126                 $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
2127                 $status->merge( $storeStatus );
2128
2129                 if ( !$status->isGood() ) {
2130                         // Even if some files could be copied, fail entirely as that is the
2131                         // easiest thing to do without data loss
2132                         $this->cleanupFailedBatch( $storeStatus, $storeBatch );
2133                         $status->ok = false;
2134                         $this->file->unlock();
2135
2136                         return $status;
2137                 }
2138
2139                 // Run the DB updates
2140                 // Because we have locked the image row, key conflicts should be rare.
2141                 // If they do occur, we can roll back the transaction at this time with
2142                 // no data loss, but leaving unregistered files scattered throughout the
2143                 // public zone.
2144                 // This is not ideal, which is why it's important to lock the image row.
2145                 if ( $insertCurrent ) {
2146                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
2147                 }
2148
2149                 if ( $insertBatch ) {
2150                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
2151                 }
2152
2153                 if ( $deleteIds ) {
2154                         $dbw->delete( 'filearchive',
2155                                 array( 'fa_id IN (' . $dbw->makeList( $deleteIds ) . ')' ),
2156                                 __METHOD__ );
2157                 }
2158
2159                 // If store batch is empty (all files are missing), deletion is to be considered successful
2160                 if ( $status->successCount > 0 || !$storeBatch ) {
2161                         if ( !$exists ) {
2162                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
2163
2164                                 DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
2165
2166                                 $this->file->purgeEverything();
2167                         } else {
2168                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
2169                                 $this->file->purgeDescription();
2170                                 $this->file->purgeHistory();
2171                         }
2172                 }
2173
2174                 $this->file->unlock();
2175
2176                 return $status;
2177         }
2178
2179         /**
2180          * Removes non-existent files from a store batch.
2181          * @param $triplets array
2182          * @return array
2183          */
2184         function removeNonexistentFiles( $triplets ) {
2185                 $files = $filteredTriplets = array();
2186                 foreach ( $triplets as $file ) {
2187                         $files[$file[0]] = $file[0];
2188                 }
2189
2190                 $result = $this->file->repo->fileExistsBatch( $files );
2191
2192                 foreach ( $triplets as $file ) {
2193                         if ( $result[$file[0]] ) {
2194                                 $filteredTriplets[] = $file;
2195                         }
2196                 }
2197
2198                 return $filteredTriplets;
2199         }
2200
2201         /**
2202          * Removes non-existent files from a cleanup batch.
2203          * @param $batch array
2204          * @return array
2205          */
2206         function removeNonexistentFromCleanup( $batch ) {
2207                 $files = $newBatch = array();
2208                 $repo = $this->file->repo;
2209
2210                 foreach ( $batch as $file ) {
2211                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
2212                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
2213                 }
2214
2215                 $result = $repo->fileExistsBatch( $files );
2216
2217                 foreach ( $batch as $file ) {
2218                         if ( $result[$file] ) {
2219                                 $newBatch[] = $file;
2220                         }
2221                 }
2222
2223                 return $newBatch;
2224         }
2225
2226         /**
2227          * Delete unused files in the deleted zone.
2228          * This should be called from outside the transaction in which execute() was called.
2229          * @return FileRepoStatus|void
2230          */
2231         function cleanup() {
2232                 if ( !$this->cleanupBatch ) {
2233                         return $this->file->repo->newGood();
2234                 }
2235
2236                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
2237
2238                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
2239
2240                 return $status;
2241         }
2242
2243         /**
2244          * Cleanup a failed batch. The batch was only partially successful, so
2245          * rollback by removing all items that were succesfully copied.
2246          *
2247          * @param Status $storeStatus
2248          * @param array $storeBatch
2249          */
2250         function cleanupFailedBatch( $storeStatus, $storeBatch ) {
2251                 $cleanupBatch = array();
2252
2253                 foreach ( $storeStatus->success as $i => $success ) {
2254                         // Check if this item of the batch was successfully copied
2255                         if ( $success ) {
2256                                 // Item was successfully copied and needs to be removed again
2257                                 // Extract ($dstZone, $dstRel) from the batch
2258                                 $cleanupBatch[] = array( $storeBatch[$i][1], $storeBatch[$i][2] );
2259                         }
2260                 }
2261                 $this->file->repo->cleanupBatch( $cleanupBatch );
2262         }
2263 }
2264
2265 # ------------------------------------------------------------------------------
2266
2267 /**
2268  * Helper class for file movement
2269  * @ingroup FileAbstraction
2270  */
2271 class LocalFileMoveBatch {
2272
2273         /**
2274          * @var LocalFile
2275          */
2276         var $file;
2277
2278         /**
2279          * @var Title
2280          */
2281         var $target;
2282
2283         var $cur, $olds, $oldCount, $archive;
2284
2285         /**
2286          * @var DatabaseBase
2287          */
2288         var $db;
2289
2290         /**
2291          * @param File $file
2292          * @param Title $target
2293          */
2294         function __construct( File $file, Title $target ) {
2295                 $this->file = $file;
2296                 $this->target = $target;
2297                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
2298                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
2299                 $this->oldName = $this->file->getName();
2300                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2301                 $this->oldRel = $this->oldHash . $this->oldName;
2302                 $this->newRel = $this->newHash . $this->newName;
2303                 $this->db = $file->getRepo()->getMasterDb();
2304         }
2305
2306         /**
2307          * Add the current image to the batch
2308          */
2309         function addCurrent() {
2310                 $this->cur = array( $this->oldRel, $this->newRel );
2311         }
2312
2313         /**
2314          * Add the old versions of the image to the batch
2315          * @return Array List of archive names from old versions
2316          */
2317         function addOlds() {
2318                 $archiveBase = 'archive';
2319                 $this->olds = array();
2320                 $this->oldCount = 0;
2321                 $archiveNames = array();
2322
2323                 $result = $this->db->select( 'oldimage',
2324                         array( 'oi_archive_name', 'oi_deleted' ),
2325                         array( 'oi_name' => $this->oldName ),
2326                         __METHOD__
2327                 );
2328
2329                 foreach ( $result as $row ) {
2330                         $archiveNames[] = $row->oi_archive_name;
2331                         $oldName = $row->oi_archive_name;
2332                         $bits = explode( '!', $oldName, 2 );
2333
2334                         if ( count( $bits ) != 2 ) {
2335                                 wfDebug( "Old file name missing !: '$oldName' \n" );
2336                                 continue;
2337                         }
2338
2339                         list( $timestamp, $filename ) = $bits;
2340
2341                         if ( $this->oldName != $filename ) {
2342                                 wfDebug( "Old file name doesn't match: '$oldName' \n" );
2343                                 continue;
2344                         }
2345
2346                         $this->oldCount++;
2347
2348                         // Do we want to add those to oldCount?
2349                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2350                                 continue;
2351                         }
2352
2353                         $this->olds[] = array(
2354                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2355                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2356                         );
2357                 }
2358
2359                 return $archiveNames;
2360         }
2361
2362         /**
2363          * Perform the move.
2364          * @return FileRepoStatus
2365          */
2366         function execute() {
2367                 $repo = $this->file->repo;
2368                 $status = $repo->newGood();
2369
2370                 $triplets = $this->getMoveTriplets();
2371                 $triplets = $this->removeNonexistentFiles( $triplets );
2372
2373                 // Copy the files into their new location
2374                 $statusMove = $repo->storeBatch( $triplets );
2375                 wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: {$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2376                 if ( !$statusMove->isGood() ) {
2377                         wfDebugLog( 'imagemove', "Error in moving files: " . $statusMove->getWikiText() );
2378                         $this->cleanupTarget( $triplets );
2379                         $statusMove->ok = false;
2380                         return $statusMove;
2381                 }
2382
2383                 $this->file->lock(); // begin
2384                 $statusDb = $this->doDBUpdates();
2385                 wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: {$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2386                 if ( !$statusDb->isGood() ) {
2387                         $this->file->unlockAndRollback();
2388                         // Something went wrong with the DB updates, so remove the target files
2389                         $this->cleanupTarget( $triplets );
2390                         $statusDb->ok = false;
2391                         return $statusDb;
2392                 }
2393                 $this->file->unlock(); // done
2394
2395                 // Everything went ok, remove the source files
2396                 $this->cleanupSource( $triplets );
2397
2398                 $status->merge( $statusDb );
2399                 $status->merge( $statusMove );
2400
2401                 return $status;
2402         }
2403
2404         /**
2405          * Do the database updates and return a new FileRepoStatus indicating how
2406          * many rows where updated.
2407          *
2408          * @return FileRepoStatus
2409          */
2410         function doDBUpdates() {
2411                 $repo = $this->file->repo;
2412                 $status = $repo->newGood();
2413                 $dbw = $this->db;
2414
2415                 // Update current image
2416                 $dbw->update(
2417                         'image',
2418                         array( 'img_name' => $this->newName ),
2419                         array( 'img_name' => $this->oldName ),
2420                         __METHOD__
2421                 );
2422
2423                 if ( $dbw->affectedRows() ) {
2424                         $status->successCount++;
2425                 } else {
2426                         $status->failCount++;
2427                         $status->fatal( 'imageinvalidfilename' );
2428                         return $status;
2429                 }
2430
2431                 // Update old images
2432                 $dbw->update(
2433                         'oldimage',
2434                         array(
2435                                 'oi_name' => $this->newName,
2436                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name',
2437                                         $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2438                         ),
2439                         array( 'oi_name' => $this->oldName ),
2440                         __METHOD__
2441                 );
2442
2443                 $affected = $dbw->affectedRows();
2444                 $total = $this->oldCount;
2445                 $status->successCount += $affected;
2446                 // Bug 34934: $total is based on files that actually exist.
2447                 // There may be more DB rows than such files, in which case $affected
2448                 // can be greater than $total. We use max() to avoid negatives here.
2449                 $status->failCount += max( 0, $total - $affected );
2450                 if ( $status->failCount ) {
2451                         $status->error( 'imageinvalidfilename' );
2452                 }
2453
2454                 return $status;
2455         }
2456
2457         /**
2458          * Generate triplets for FileRepo::storeBatch().
2459          * @return array
2460          */
2461         function getMoveTriplets() {
2462                 $moves = array_merge( array( $this->cur ), $this->olds );
2463                 $triplets = array();    // The format is: (srcUrl, destZone, destUrl)
2464
2465                 foreach ( $moves as $move ) {
2466                         // $move: (oldRelativePath, newRelativePath)
2467                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2468                         $triplets[] = array( $srcUrl, 'public', $move[1] );
2469                         wfDebugLog( 'imagemove', "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}" );
2470                 }
2471
2472                 return $triplets;
2473         }
2474
2475         /**
2476          * Removes non-existent files from move batch.
2477          * @param $triplets array
2478          * @return array
2479          */
2480         function removeNonexistentFiles( $triplets ) {
2481                 $files = array();
2482
2483                 foreach ( $triplets as $file ) {
2484                         $files[$file[0]] = $file[0];
2485                 }
2486
2487                 $result = $this->file->repo->fileExistsBatch( $files );
2488                 $filteredTriplets = array();
2489
2490                 foreach ( $triplets as $file ) {
2491                         if ( $result[$file[0]] ) {
2492                                 $filteredTriplets[] = $file;
2493                         } else {
2494                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
2495                         }
2496                 }
2497
2498                 return $filteredTriplets;
2499         }
2500
2501         /**
2502          * Cleanup a partially moved array of triplets by deleting the target
2503          * files. Called if something went wrong half way.
2504          */
2505         function cleanupTarget( $triplets ) {
2506                 // Create dest pairs from the triplets
2507                 $pairs = array();
2508                 foreach ( $triplets as $triplet ) {
2509                         $pairs[] = array( $triplet[1], $triplet[2] );
2510                 }
2511
2512                 $this->file->repo->cleanupBatch( $pairs );
2513         }
2514
2515         /**
2516          * Cleanup a fully moved array of triplets by deleting the source files.
2517          * Called at the end of the move process if everything else went ok.
2518          */
2519         function cleanupSource( $triplets ) {
2520                 // Create source file names from the triplets
2521                 $files = array();
2522                 foreach ( $triplets as $triplet ) {
2523                         $files[] = $triplet[0];
2524                 }
2525
2526                 $this->file->repo->cleanupBatch( $files );
2527         }
2528 }