includes/filerepo/LocalFile.php

   1 <?php
   2 /**
   3  * Local file in the wiki's own database
   4  *
   5  * @file
   6  * @ingroup FileRepo
   7  */
   8
   9 /**
  10  * Bump this number when serialized cache records may be incompatible.
  11  */
  12 define( 'MW_FILE_VERSION', 8 );
  13
  14 /**
  15  * Class to represent a local file in the wiki's own database
  16  *
  17  * Provides methods to retrieve paths (physical, logical, URL),
  18  * to generate image thumbnails or for uploading.
  19  *
  20  * Note that only the repo object knows what its file class is called. You should
  21  * never name a file class explictly outside of the repo class. Instead use the
  22  * repo's factory functions to generate file objects, for example:
  23  *
  24  * RepoGroup::singleton()->getLocalRepo()->newFile($title);
  25  *
  26  * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
  27  * in most cases.
  28  *
  29  * @ingroup FileRepo
  30  */
  31 class LocalFile extends File {
  32         /**#@+
  33          * @private
  34          */
  35         var
  36                 $fileExists,       # does the file file exist on disk? (loadFromXxx)
  37                 $historyLine,      # Number of line to return by nextHistoryLine() (constructor)
  38                 $historyRes,       # result of the query for the file's history (nextHistoryLine)
  39                 $width,            # \
  40                 $height,           #  |
  41                 $bits,             #   --- returned by getimagesize (loadFromXxx)
  42                 $attr,             # /
  43                 $media_type,       # MEDIATYPE_xxx (bitmap, drawing, audio...)
  44                 $mime,             # MIME type, determined by MimeMagic::guessMimeType
  45                 $major_mime,       # Major mime type
  46                 $minor_mime,       # Minor mime type
  47                 $size,             # Size in bytes (loadFromXxx)
  48                 $metadata,         # Handler-specific metadata
  49                 $timestamp,        # Upload timestamp
  50                 $sha1,             # SHA-1 base 36 content hash
  51                 $user, $user_text, # User, who uploaded the file
  52                 $description,      # Description of current revision of the file
  53                 $dataLoaded,       # Whether or not all this has been loaded from the database (loadFromXxx)
  54                 $upgraded,         # Whether the row was upgraded on load
  55                 $locked,           # True if the image row is locked
  56                 $missing,          # True if file is not present in file system. Not to be cached in memcached
  57                 $deleted;          # Bitfield akin to rev_deleted
  58
  59         /**#@-*/
  60
  61         /**
  62          * Create a LocalFile from a title
  63          * Do not call this except from inside a repo class.
  64          *
  65          * Note: $unused param is only here to avoid an E_STRICT
  66          */
  67         static function newFromTitle( $title, $repo, $unused = null ) {
  68                 return new self( $title, $repo );
  69         }
  70
  71         /**
  72          * Create a LocalFile from a title
  73          * Do not call this except from inside a repo class.
  74          */
  75         static function newFromRow( $row, $repo ) {
  76                 $title = Title::makeTitle( NS_FILE, $row->img_name );
  77                 $file = new self( $title, $repo );
  78                 $file->loadFromRow( $row );
  79
  80                 return $file;
  81         }
  82
  83         /**
  84          * Create a LocalFile from a SHA-1 key
  85          * Do not call this except from inside a repo class.
  86          * @param $sha1
  87          * @param $repo LocalRepo
  88          * @param $timestamp
  89          */
  90         static function newFromKey( $sha1, $repo, $timestamp = false ) {
  91                 $conds = array( 'img_sha1' => $sha1 );
  92
  93                 if ( $timestamp ) {
  94                         $conds['img_timestamp'] = $timestamp;
  95                 }
  96
  97                 $dbr = $repo->getSlaveDB();
  98                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
  99
 100                 if ( $row ) {
 101                         return self::newFromRow( $row, $repo );
 102                 } else {
 103                         return false;
 104                 }
 105         }
 106
 107         /**
 108          * Fields in the image table
 109          */
 110         static function selectFields() {
 111                 return array(
 112                         'img_name',
 113                         'img_size',
 114                         'img_width',
 115                         'img_height',
 116                         'img_metadata',
 117                         'img_bits',
 118                         'img_media_type',
 119                         'img_major_mime',
 120                         'img_minor_mime',
 121                         'img_description',
 122                         'img_user',
 123                         'img_user_text',
 124                         'img_timestamp',
 125                         'img_sha1',
 126                 );
 127         }
 128
 129         /**
 130          * Constructor.
 131          * Do not call this except from inside a repo class.
 132          */
 133         function __construct( $title, $repo ) {
 134                 if ( !is_object( $title ) ) {
 135                         throw new MWException( __CLASS__ . ' constructor given bogus title.' );
 136                 }
 137
 138                 parent::__construct( $title, $repo );
 139
 140                 $this->metadata = '';
 141                 $this->historyLine = 0;
 142                 $this->historyRes = null;
 143                 $this->dataLoaded = false;
 144         }
 145
 146         /**
 147          * Get the memcached key for the main data for this file, or false if
 148          * there is no access to the shared cache.
 149          */
 150         function getCacheKey() {
 151                 $hashedName = md5( $this->getName() );
 152
 153                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 154         }
 155
 156         /**
 157          * Try to load file metadata from memcached. Returns true on success.
 158          */
 159         function loadFromCache() {
 160                 global $wgMemc;
 161
 162                 wfProfileIn( __METHOD__ );
 163                 $this->dataLoaded = false;
 164                 $key = $this->getCacheKey();
 165
 166                 if ( !$key ) {
 167                         wfProfileOut( __METHOD__ );
 168                         return false;
 169                 }
 170
 171                 $cachedValues = $wgMemc->get( $key );
 172
 173                 // Check if the key existed and belongs to this version of MediaWiki
 174                 if ( isset( $cachedValues['version'] ) && ( $cachedValues['version'] == MW_FILE_VERSION ) ) {
 175                         wfDebug( "Pulling file metadata from cache key $key\n" );
 176                         $this->fileExists = $cachedValues['fileExists'];
 177                         if ( $this->fileExists ) {
 178                                 $this->setProps( $cachedValues );
 179                         }
 180                         $this->dataLoaded = true;
 181                 }
 182
 183                 if ( $this->dataLoaded ) {
 184                         wfIncrStats( 'image_cache_hit' );
 185                 } else {
 186                         wfIncrStats( 'image_cache_miss' );
 187                 }
 188
 189                 wfProfileOut( __METHOD__ );
 190                 return $this->dataLoaded;
 191         }
 192
 193         /**
 194          * Save the file metadata to memcached
 195          */
 196         function saveToCache() {
 197                 global $wgMemc;
 198
 199                 $this->load();
 200                 $key = $this->getCacheKey();
 201
 202                 if ( !$key ) {
 203                         return;
 204                 }
 205
 206                 $fields = $this->getCacheFields( '' );
 207                 $cache = array( 'version' => MW_FILE_VERSION );
 208                 $cache['fileExists'] = $this->fileExists;
 209
 210                 if ( $this->fileExists ) {
 211                         foreach ( $fields as $field ) {
 212                                 $cache[$field] = $this->$field;
 213                         }
 214                 }
 215
 216                 $wgMemc->set( $key, $cache, 60 * 60 * 24 * 7 ); // A week
 217         }
 218
 219         /**
 220          * Load metadata from the file itself
 221          */
 222         function loadFromFile() {
 223                 $this->setProps( self::getPropsFromPath( $this->getPath() ) );
 224         }
 225
 226         function getCacheFields( $prefix = 'img_' ) {
 227                 static $fields = array( 'size', 'width', 'height', 'bits', 'media_type',
 228                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user', 'user_text', 'description' );
 229                 static $results = array();
 230
 231                 if ( $prefix == '' ) {
 232                         return $fields;
 233                 }
 234
 235                 if ( !isset( $results[$prefix] ) ) {
 236                         $prefixedFields = array();
 237                         foreach ( $fields as $field ) {
 238                                 $prefixedFields[] = $prefix . $field;
 239                         }
 240                         $results[$prefix] = $prefixedFields;
 241                 }
 242
 243                 return $results[$prefix];
 244         }
 245
 246         /**
 247          * Load file metadata from the DB
 248          */
 249         function loadFromDB() {
 250                 # Polymorphic function name to distinguish foreign and local fetches
 251                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 252                 wfProfileIn( $fname );
 253
 254                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 255                 $this->dataLoaded = true;
 256
 257                 $dbr = $this->repo->getMasterDB();
 258
 259                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 260                         array( 'img_name' => $this->getName() ), $fname );
 261
 262                 if ( $row ) {
 263                         $this->loadFromRow( $row );
 264                 } else {
 265                         $this->fileExists = false;
 266                 }
 267
 268                 wfProfileOut( $fname );
 269         }
 270
 271         /**
 272          * Decode a row from the database (either object or array) to an array
 273          * with timestamps and MIME types decoded, and the field prefix removed.
 274          */
 275         function decodeRow( $row, $prefix = 'img_' ) {
 276                 $array = (array)$row;
 277                 $prefixLength = strlen( $prefix );
 278
 279                 // Sanity check prefix once
 280                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 281                         throw new MWException( __METHOD__ .  ': incorrect $prefix parameter' );
 282                 }
 283
 284                 $decoded = array();
 285
 286                 foreach ( $array as $name => $value ) {
 287                         $decoded[substr( $name, $prefixLength )] = $value;
 288                 }
 289
 290                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 291
 292                 if ( empty( $decoded['major_mime'] ) ) {
 293                         $decoded['mime'] = 'unknown/unknown';
 294                 } else {
 295                         if ( !$decoded['minor_mime'] ) {
 296                                 $decoded['minor_mime'] = 'unknown';
 297                         }
 298                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 299                 }
 300
 301                 # Trim zero padding from char/binary field
 302                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 303
 304                 return $decoded;
 305         }
 306
 307         /**
 308          * Load file metadata from a DB result row
 309          */
 310         function loadFromRow( $row, $prefix = 'img_' ) {
 311                 $this->dataLoaded = true;
 312                 $array = $this->decodeRow( $row, $prefix );
 313
 314                 foreach ( $array as $name => $value ) {
 315                         $this->$name = $value;
 316                 }
 317
 318                 $this->fileExists = true;
 319                 $this->maybeUpgradeRow();
 320         }
 321
 322         /**
 323          * Load file metadata from cache or DB, unless already loaded
 324          */
 325         function load() {
 326                 if ( !$this->dataLoaded ) {
 327                         if ( !$this->loadFromCache() ) {
 328                                 $this->loadFromDB();
 329                                 $this->saveToCache();
 330                         }
 331                         $this->dataLoaded = true;
 332                 }
 333         }
 334
 335         /**
 336          * Upgrade a row if it needs it
 337          */
 338         function maybeUpgradeRow() {
 339                 if ( wfReadOnly() ) {
 340                         return;
 341                 }
 342
 343                 if ( is_null( $this->media_type ) ||
 344                         $this->mime == 'image/svg'
 345                 ) {
 346                         $this->upgradeRow();
 347                         $this->upgraded = true;
 348                 } else {
 349                         $handler = $this->getHandler();
 350                         if ( $handler && !$handler->isMetadataValid( $this, $this->metadata ) ) {
 351                                 $this->upgradeRow();
 352                                 $this->upgraded = true;
 353                         }
 354                 }
 355         }
 356
 357         function getUpgraded() {
 358                 return $this->upgraded;
 359         }
 360
 361         /**
 362          * Fix assorted version-related problems with the image row by reloading it from the file
 363          */
 364         function upgradeRow() {
 365                 wfProfileIn( __METHOD__ );
 366
 367                 $this->loadFromFile();
 368
 369                 # Don't destroy file info of missing files
 370                 if ( !$this->fileExists ) {
 371                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 372                         wfProfileOut( __METHOD__ );
 373                         return;
 374                 }
 375
 376                 $dbw = $this->repo->getMasterDB();
 377                 list( $major, $minor ) = self::splitMime( $this->mime );
 378
 379                 if ( wfReadOnly() ) {
 380                         wfProfileOut( __METHOD__ );
 381                         return;
 382                 }
 383                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 384
 385                 $dbw->update( 'image',
 386                         array(
 387                                 'img_width' => $this->width,
 388                                 'img_height' => $this->height,
 389                                 'img_bits' => $this->bits,
 390                                 'img_media_type' => $this->media_type,
 391                                 'img_major_mime' => $major,
 392                                 'img_minor_mime' => $minor,
 393                                 'img_metadata' => $this->metadata,
 394                                 'img_sha1' => $this->sha1,
 395                         ), array( 'img_name' => $this->getName() ),
 396                         __METHOD__
 397                 );
 398
 399                 $this->saveToCache();
 400                 wfProfileOut( __METHOD__ );
 401         }
 402
 403         /**
 404          * Set properties in this object to be equal to those given in the
 405          * associative array $info. Only cacheable fields can be set.
 406          *
 407          * If 'mime' is given, it will be split into major_mime/minor_mime.
 408          * If major_mime/minor_mime are given, $this->mime will also be set.
 409          */
 410         function setProps( $info ) {
 411                 $this->dataLoaded = true;
 412                 $fields = $this->getCacheFields( '' );
 413                 $fields[] = 'fileExists';
 414
 415                 foreach ( $fields as $field ) {
 416                         if ( isset( $info[$field] ) ) {
 417                                 $this->$field = $info[$field];
 418                         }
 419                 }
 420
 421                 // Fix up mime fields
 422                 if ( isset( $info['major_mime'] ) ) {
 423                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 424                 } elseif ( isset( $info['mime'] ) ) {
 425                         $this->mime = $info['mime'];
 426                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 427                 }
 428         }
 429
 430         /** splitMime inherited */
 431         /** getName inherited */
 432         /** getTitle inherited */
 433         /** getURL inherited */
 434         /** getViewURL inherited */
 435         /** getPath inherited */
 436         /** isVisible inhereted */
 437
 438         function isMissing() {
 439                 if ( $this->missing === null ) {
 440                         list( $fileExists ) = $this->repo->fileExistsBatch( array( $this->getVirtualUrl() ), FileRepo::FILES_ONLY );
 441                         $this->missing = !$fileExists;
 442                 }
 443                 return $this->missing;
 444         }
 445
 446         /**
 447          * Return the width of the image
 448          *
 449          * Returns false on error
 450          */
 451         public function getWidth( $page = 1 ) {
 452                 $this->load();
 453
 454                 if ( $this->isMultipage() ) {
 455                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 456                         if ( $dim ) {
 457                                 return $dim['width'];
 458                         } else {
 459                                 return false;
 460                         }
 461                 } else {
 462                         return $this->width;
 463                 }
 464         }
 465
 466         /**
 467          * Return the height of the image
 468          *
 469          * Returns false on error
 470          */
 471         public function getHeight( $page = 1 ) {
 472                 $this->load();
 473
 474                 if ( $this->isMultipage() ) {
 475                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 476                         if ( $dim ) {
 477                                 return $dim['height'];
 478                         } else {
 479                                 return false;
 480                         }
 481                 } else {
 482                         return $this->height;
 483                 }
 484         }
 485
 486         /**
 487          * Returns ID or name of user who uploaded the file
 488          *
 489          * @param $type string 'text' or 'id'
 490          */
 491         function getUser( $type = 'text' ) {
 492                 $this->load();
 493
 494                 if ( $type == 'text' ) {
 495                         return $this->user_text;
 496                 } elseif ( $type == 'id' ) {
 497                         return $this->user;
 498                 }
 499         }
 500
 501         /**
 502          * Get handler-specific metadata
 503          */
 504         function getMetadata() {
 505                 $this->load();
 506                 return $this->metadata;
 507         }
 508
 509         function getBitDepth() {
 510                 $this->load();
 511                 return $this->bits;
 512         }
 513
 514         /**
 515          * Return the size of the image file, in bytes
 516          */
 517         public function getSize() {
 518                 $this->load();
 519                 return $this->size;
 520         }
 521
 522         /**
 523          * Returns the mime type of the file.
 524          */
 525         function getMimeType() {
 526                 $this->load();
 527                 return $this->mime;
 528         }
 529
 530         /**
 531          * Return the type of the media in the file.
 532          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 533          */
 534         function getMediaType() {
 535                 $this->load();
 536                 return $this->media_type;
 537         }
 538
 539         /** canRender inherited */
 540         /** mustRender inherited */
 541         /** allowInlineDisplay inherited */
 542         /** isSafeFile inherited */
 543         /** isTrustedFile inherited */
 544
 545         /**
 546          * Returns true if the file file exists on disk.
 547          * @return boolean Whether file file exist on disk.
 548          */
 549         public function exists() {
 550                 $this->load();
 551                 return $this->fileExists;
 552         }
 553
 554         /** getTransformScript inherited */
 555         /** getUnscaledThumb inherited */
 556         /** thumbName inherited */
 557         /** createThumb inherited */
 558         /** getThumbnail inherited */
 559         /** transform inherited */
 560
 561         /**
 562          * Fix thumbnail files from 1.4 or before, with extreme prejudice
 563          */
 564         function migrateThumbFile( $thumbName ) {
 565                 $thumbDir = $this->getThumbPath();
 566                 $thumbPath = "$thumbDir/$thumbName";
 567
 568                 if ( is_dir( $thumbPath ) ) {
 569                         // Directory where file should be
 570                         // This happened occasionally due to broken migration code in 1.5
 571                         // Rename to broken-*
 572                         for ( $i = 0; $i < 100 ; $i++ ) {
 573                                 $broken = $this->repo->getZonePath( 'public' ) . "/broken-$i-$thumbName";
 574                                 if ( !file_exists( $broken ) ) {
 575                                         rename( $thumbPath, $broken );
 576                                         break;
 577                                 }
 578                         }
 579                         // Doesn't exist anymore
 580                         clearstatcache();
 581                 }
 582
 583                 if ( is_file( $thumbDir ) ) {
 584                         // File where directory should be
 585                         unlink( $thumbDir );
 586                         // Doesn't exist anymore
 587                         clearstatcache();
 588                 }
 589         }
 590
 591         /** getHandler inherited */
 592         /** iconThumb inherited */
 593         /** getLastError inherited */
 594
 595         /**
 596          * Get all thumbnail names previously generated for this file
 597          */
 598         function getThumbnails() {
 599                 $this->load();
 600
 601                 $files = array();
 602                 $dir = $this->getThumbPath();
 603
 604                 if ( is_dir( $dir ) ) {
 605                         $handle = opendir( $dir );
 606
 607                         if ( $handle ) {
 608                                 while ( false !== ( $file = readdir( $handle ) ) ) {
 609                                         if ( $file { 0 } != '.' ) {
 610                                                 $files[] = $file;
 611                                         }
 612                                 }
 613
 614                                 closedir( $handle );
 615                         }
 616                 }
 617
 618                 return $files;
 619         }
 620
 621         /**
 622          * Refresh metadata in memcached, but don't touch thumbnails or squid
 623          */
 624         function purgeMetadataCache() {
 625                 $this->loadFromDB();
 626                 $this->saveToCache();
 627                 $this->purgeHistory();
 628         }
 629
 630         /**
 631          * Purge the shared history (OldLocalFile) cache
 632          */
 633         function purgeHistory() {
 634                 global $wgMemc;
 635
 636                 $hashedName = md5( $this->getName() );
 637                 $oldKey = $this->repo->getSharedCacheKey( 'oldfile', $hashedName );
 638
 639                 if ( $oldKey ) {
 640                         $wgMemc->delete( $oldKey );
 641                 }
 642         }
 643
 644         /**
 645          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid
 646          */
 647         function purgeCache() {
 648                 // Refresh metadata cache
 649                 $this->purgeMetadataCache();
 650
 651                 // Delete thumbnails
 652                 $this->purgeThumbnails();
 653
 654                 // Purge squid cache for this file
 655                 SquidUpdate::purge( array( $this->getURL() ) );
 656         }
 657
 658         /**
 659          * Delete cached transformed files
 660          */
 661         function purgeThumbnails() {
 662                 global $wgUseSquid, $wgExcludeFromThumbnailPurge;
 663
 664                 // Delete thumbnails
 665                 $files = $this->getThumbnails();
 666                 $dir = $this->getThumbPath();
 667                 $urls = array();
 668
 669                 foreach ( $files as $file ) {
 670                         // Only remove files not in the $wgExcludeFromThumbnailPurge configuration variable
 671                         $ext = pathinfo( "$dir/$file", PATHINFO_EXTENSION );
 672                         if ( in_array( $ext, $wgExcludeFromThumbnailPurge ) ) {
 673                                 continue;
 674                         }
 675
 676                         # Check that the base file name is part of the thumb name
 677                         # This is a basic sanity check to avoid erasing unrelated directories
 678                         if ( strpos( $file, $this->getName() ) !== false ) {
 679                                 $url = $this->getThumbUrl( $file );
 680                                 $urls[] = $url;
 681                                 @unlink( "$dir/$file" );
 682                         }
 683                 }
 684
 685                 // Purge the squid
 686                 if ( $wgUseSquid ) {
 687                         SquidUpdate::purge( $urls );
 688                 }
 689         }
 690
 691         /** purgeDescription inherited */
 692         /** purgeEverything inherited */
 693
 694         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
 695                 $dbr = $this->repo->getSlaveDB();
 696                 $tables = array( 'oldimage' );
 697                 $fields = OldLocalFile::selectFields();
 698                 $conds = $opts = $join_conds = array();
 699                 $eq = $inc ? '=' : '';
 700                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
 701
 702                 if ( $start ) {
 703                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
 704                 }
 705
 706                 if ( $end ) {
 707                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
 708                 }
 709
 710                 if ( $limit ) {
 711                         $opts['LIMIT'] = $limit;
 712                 }
 713
 714                 // Search backwards for time > x queries
 715                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
 716                 $opts['ORDER BY'] = "oi_timestamp $order";
 717                 $opts['USE INDEX'] = array( 'oldimage' => 'oi_name_timestamp' );
 718
 719                 wfRunHooks( 'LocalFile::getHistory', array( &$this, &$tables, &$fields,
 720                         &$conds, &$opts, &$join_conds ) );
 721
 722                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
 723                 $r = array();
 724
 725                 foreach ( $res as $row ) {
 726                         if ( $this->repo->oldFileFromRowFactory ) {
 727                                 $r[] = call_user_func( $this->repo->oldFileFromRowFactory, $row, $this->repo );
 728                         } else {
 729                                 $r[] = OldLocalFile::newFromRow( $row, $this->repo );
 730                         }
 731                 }
 732
 733                 if ( $order == 'ASC' ) {
 734                         $r = array_reverse( $r ); // make sure it ends up descending
 735                 }
 736
 737                 return $r;
 738         }
 739
 740         /**
 741          * Return the history of this file, line by line.
 742          * starts with current version, then old versions.
 743          * uses $this->historyLine to check which line to return:
 744          *  0      return line for current version
 745          *  1      query for old versions, return first one
 746          *  2, ... return next old version from above query
 747          */
 748         public function nextHistoryLine() {
 749                 # Polymorphic function name to distinguish foreign and local fetches
 750                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 751
 752                 $dbr = $this->repo->getSlaveDB();
 753
 754                 if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
 755                         $this->historyRes = $dbr->select( 'image',
 756                                 array(
 757                                         '*',
 758                                         "'' AS oi_archive_name",
 759                                         '0 as oi_deleted',
 760                                         'img_sha1'
 761                                 ),
 762                                 array( 'img_name' => $this->title->getDBkey() ),
 763                                 $fname
 764                         );
 765
 766                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
 767                                 $this->historyRes = null;
 768                                 return false;
 769                         }
 770                 } elseif ( $this->historyLine == 1 ) {
 771                         $this->historyRes = $dbr->select( 'oldimage', '*',
 772                                 array( 'oi_name' => $this->title->getDBkey() ),
 773                                 $fname,
 774                                 array( 'ORDER BY' => 'oi_timestamp DESC' )
 775                         );
 776                 }
 777                 $this->historyLine ++;
 778
 779                 return $dbr->fetchObject( $this->historyRes );
 780         }
 781
 782         /**
 783          * Reset the history pointer to the first element of the history
 784          */
 785         public function resetHistory() {
 786                 $this->historyLine = 0;
 787
 788                 if ( !is_null( $this->historyRes ) ) {
 789                         $this->historyRes = null;
 790                 }
 791         }
 792
 793         /** getFullPath inherited */
 794         /** getHashPath inherited */
 795         /** getRel inherited */
 796         /** getUrlRel inherited */
 797         /** getArchiveRel inherited */
 798         /** getThumbRel inherited */
 799         /** getArchivePath inherited */
 800         /** getThumbPath inherited */
 801         /** getArchiveUrl inherited */
 802         /** getThumbUrl inherited */
 803         /** getArchiveVirtualUrl inherited */
 804         /** getThumbVirtualUrl inherited */
 805         /** isHashed inherited */
 806
 807         /**
 808          * Upload a file and record it in the DB
 809          * @param $srcPath String: source path or virtual URL
 810          * @param $comment String: upload description
 811          * @param $pageText String: text to use for the new description page,
 812          *                  if a new description page is created
 813          * @param $flags Integer: flags for publish()
 814          * @param $props Array: File properties, if known. This can be used to reduce the
 815          *               upload time when uploading virtual URLs for which the file info
 816          *               is already known
 817          * @param $timestamp String: timestamp for img_timestamp, or false to use the current time
 818          * @param $user Mixed: User object or null to use $wgUser
 819          *
 820          * @return FileRepoStatus object. On success, the value member contains the
 821          *     archive name, or an empty string if it was a new file.
 822          */
 823         function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false, $timestamp = false, $user = null ) {
 824                 $this->lock();
 825                 $status = $this->publish( $srcPath, $flags );
 826
 827                 if ( $status->ok ) {
 828                         if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp, $user ) ) {
 829                                 $status->fatal( 'filenotfound', $srcPath );
 830                         }
 831                 }
 832
 833                 $this->unlock();
 834
 835                 return $status;
 836         }
 837
 838         /**
 839          * Record a file upload in the upload log and the image table
 840          * @deprecated use upload()
 841          */
 842         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
 843                 $watch = false, $timestamp = false )
 844         {
 845                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
 846
 847                 if ( !$this->recordUpload2( $oldver, $desc, $pageText ) ) {
 848                         return false;
 849                 }
 850
 851                 if ( $watch ) {
 852                         global $wgUser;
 853                         $wgUser->addWatch( $this->getTitle() );
 854                 }
 855                 return true;
 856
 857         }
 858
 859         /**
 860          * Record a file upload in the upload log and the image table
 861          */
 862         function recordUpload2(
 863                 $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null
 864         ) {
 865                 if ( is_null( $user ) ) {
 866                         global $wgUser;
 867                         $user = $wgUser;
 868                 }
 869
 870                 $dbw = $this->repo->getMasterDB();
 871                 $dbw->begin();
 872
 873                 if ( !$props ) {
 874                         $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 875                 }
 876
 877                 if ( $timestamp === false ) {
 878                         $timestamp = $dbw->timestamp();
 879                 }
 880
 881                 $props['description'] = $comment;
 882                 $props['user'] = $user->getId();
 883                 $props['user_text'] = $user->getName();
 884                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
 885                 $this->setProps( $props );
 886
 887                 # Delete thumbnails
 888                 $this->purgeThumbnails();
 889
 890                 # The file is already on its final location, remove it from the squid cache
 891                 SquidUpdate::purge( array( $this->getURL() ) );
 892
 893                 # Fail now if the file isn't there
 894                 if ( !$this->fileExists ) {
 895                         wfDebug( __METHOD__ . ": File " . $this->getPath() . " went missing!\n" );
 896                         return false;
 897                 }
 898
 899                 $reupload = false;
 900
 901                 # Test to see if the row exists using INSERT IGNORE
 902                 # This avoids race conditions by locking the row until the commit, and also
 903                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
 904                 $dbw->insert( 'image',
 905                         array(
 906                                 'img_name' => $this->getName(),
 907                                 'img_size' => $this->size,
 908                                 'img_width' => intval( $this->width ),
 909                                 'img_height' => intval( $this->height ),
 910                                 'img_bits' => $this->bits,
 911                                 'img_media_type' => $this->media_type,
 912                                 'img_major_mime' => $this->major_mime,
 913                                 'img_minor_mime' => $this->minor_mime,
 914                                 'img_timestamp' => $timestamp,
 915                                 'img_description' => $comment,
 916                                 'img_user' => $user->getId(),
 917                                 'img_user_text' => $user->getName(),
 918                                 'img_metadata' => $this->metadata,
 919                                 'img_sha1' => $this->sha1
 920                         ),
 921                         __METHOD__,
 922                         'IGNORE'
 923                 );
 924
 925                 if ( $dbw->affectedRows() == 0 ) {
 926                         $reupload = true;
 927
 928                         # Collision, this is an update of a file
 929                         # Insert previous contents into oldimage
 930                         $dbw->insertSelect( 'oldimage', 'image',
 931                                 array(
 932                                         'oi_name' => 'img_name',
 933                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
 934                                         'oi_size' => 'img_size',
 935                                         'oi_width' => 'img_width',
 936                                         'oi_height' => 'img_height',
 937                                         'oi_bits' => 'img_bits',
 938                                         'oi_timestamp' => 'img_timestamp',
 939                                         'oi_description' => 'img_description',
 940                                         'oi_user' => 'img_user',
 941                                         'oi_user_text' => 'img_user_text',
 942                                         'oi_metadata' => 'img_metadata',
 943                                         'oi_media_type' => 'img_media_type',
 944                                         'oi_major_mime' => 'img_major_mime',
 945                                         'oi_minor_mime' => 'img_minor_mime',
 946                                         'oi_sha1' => 'img_sha1'
 947                                 ), array( 'img_name' => $this->getName() ), __METHOD__
 948                         );
 949
 950                         # Update the current image row
 951                         $dbw->update( 'image',
 952                                 array( /* SET */
 953                                         'img_size' => $this->size,
 954                                         'img_width' => intval( $this->width ),
 955                                         'img_height' => intval( $this->height ),
 956                                         'img_bits' => $this->bits,
 957                                         'img_media_type' => $this->media_type,
 958                                         'img_major_mime' => $this->major_mime,
 959                                         'img_minor_mime' => $this->minor_mime,
 960                                         'img_timestamp' => $timestamp,
 961                                         'img_description' => $comment,
 962                                         'img_user' => $user->getId(),
 963                                         'img_user_text' => $user->getName(),
 964                                         'img_metadata' => $this->metadata,
 965                                         'img_sha1' => $this->sha1
 966                                 ), array( /* WHERE */
 967                                         'img_name' => $this->getName()
 968                                 ), __METHOD__
 969                         );
 970                 } else {
 971                         # This is a new file
 972                         # Update the image count
 973                         $site_stats = $dbw->tableName( 'site_stats' );
 974                         $dbw->query( "UPDATE $site_stats SET ss_images=ss_images+1", __METHOD__ );
 975                 }
 976
 977                 $descTitle = $this->getTitle();
 978                 $article = new ImagePage( $descTitle );
 979                 $article->setFile( $this );
 980
 981                 # Add the log entry
 982                 $log = new LogPage( 'upload' );
 983                 $action = $reupload ? 'overwrite' : 'upload';
 984                 $log->addEntry( $action, $descTitle, $comment, array(), $user );
 985
 986                 if ( $descTitle->exists() ) {
 987                         # Create a null revision
 988                         $latest = $descTitle->getLatestRevID();
 989                         $nullRevision = Revision::newNullRevision(
 990                                 $dbw,
 991                                 $descTitle->getArticleId(),
 992                                 $log->getRcComment(),
 993                                 false
 994                         );
 995                         $nullRevision->insertOn( $dbw );
 996
 997                         wfRunHooks( 'NewRevisionFromEditComplete', array( $article, $nullRevision, $latest, $user ) );
 998                         $article->updateRevisionOn( $dbw, $nullRevision );
 999
1000                         # Invalidate the cache for the description page
1001                         $descTitle->invalidateCache();
1002                         $descTitle->purgeSquid();
1003                 } else {
1004                         # New file; create the description page.
1005                         # There's already a log entry, so don't make a second RC entry
1006                         # Squid and file cache for the description page are purged by doEdit.
1007                         $article->doEdit( $pageText, $comment, EDIT_NEW | EDIT_SUPPRESS_RC );
1008                 }
1009
1010                 # Commit the transaction now, in case something goes wrong later
1011                 # The most important thing is that files don't get lost, especially archives
1012                 $dbw->commit();
1013
1014                 # Save to cache and purge the squid
1015                 # We shall not saveToCache before the commit since otherwise
1016                 # in case of a rollback there is an usable file from memcached
1017                 # which in fact doesn't really exist (bug 24978)
1018                 $this->saveToCache();
1019
1020                 # Hooks, hooks, the magic of hooks...
1021                 wfRunHooks( 'FileUpload', array( $this, $reupload, $descTitle->exists() ) );
1022
1023                 # Invalidate cache for all pages using this file
1024                 $update = new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' );
1025                 $update->doUpdate();
1026
1027                 # Invalidate cache for all pages that redirects on this page
1028                 $redirs = $this->getTitle()->getRedirectsHere();
1029
1030                 foreach ( $redirs as $redir ) {
1031                         $update = new HTMLCacheUpdate( $redir, 'imagelinks' );
1032                         $update->doUpdate();
1033                 }
1034
1035                 return true;
1036         }
1037
1038         /**
1039          * Move or copy a file to its public location. If a file exists at the
1040          * destination, move it to an archive. Returns a FileRepoStatus object with
1041          * the archive name in the "value" member on success.
1042          *
1043          * The archive name should be passed through to recordUpload for database
1044          * registration.
1045          *
1046          * @param $srcPath String: local filesystem path to the source image
1047          * @param $flags Integer: a bitwise combination of:
1048          *     File::DELETE_SOURCE      Delete the source file, i.e. move rather than copy
1049          * @param $dstArchiveName string File name if the file is to be published
1050          *     into the archive
1051          * @return FileRepoStatus object. On success, the value member contains the
1052          *     archive name, or an empty string if it was a new file.
1053          */
1054         function publish( $srcPath, $flags = 0, $dstArchiveName = null ) {
1055                 $this->lock();
1056
1057                 if ( $dstArchiveName ) {
1058                         $dstRel = 'archive/' . $this->getHashPath() . $dstArchiveName;
1059                 } else {
1060                         $dstRel = $this->getRel();
1061                 }
1062
1063                 $archiveName = wfTimestamp( TS_MW ) . '!'. $this->getName();
1064                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1065                 $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1066                 $status = $this->repo->publish( $srcPath, $dstRel, $archiveRel, $flags );
1067
1068                 if ( $status->value == 'new' ) {
1069                         $status->value = '';
1070                 } else {
1071                         $status->value = $archiveName;
1072                 }
1073
1074                 $this->unlock();
1075
1076                 return $status;
1077         }
1078
1079         /** getLinksTo inherited */
1080         /** getExifData inherited */
1081         /** isLocal inherited */
1082         /** wasDeleted inherited */
1083
1084         /**
1085          * Move file to the new title
1086          *
1087          * Move current, old version and all thumbnails
1088          * to the new filename. Old file is deleted.
1089          *
1090          * Cache purging is done; checks for validity
1091          * and logging are caller's responsibility
1092          *
1093          * @param $target Title New file name
1094          * @return FileRepoStatus object.
1095          */
1096         function move( $target ) {
1097                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1098                 $this->lock();
1099
1100                 $batch = new LocalFileMoveBatch( $this, $target );
1101                 $batch->addCurrent();
1102                 $batch->addOlds();
1103
1104                 $status = $batch->execute();
1105                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1106
1107                 $this->purgeEverything();
1108                 $this->unlock();
1109
1110                 if ( $status->isOk() ) {
1111                         // Now switch the object
1112                         $this->title = $target;
1113                         // Force regeneration of the name and hashpath
1114                         unset( $this->name );
1115                         unset( $this->hashPath );
1116                         // Purge the new image
1117                         $this->purgeEverything();
1118                 }
1119
1120                 return $status;
1121         }
1122
1123         /**
1124          * Delete all versions of the file.
1125          *
1126          * Moves the files into an archive directory (or deletes them)
1127          * and removes the database rows.
1128          *
1129          * Cache purging is done; logging is caller's responsibility.
1130          *
1131          * @param $reason
1132          * @param $suppress
1133          * @return FileRepoStatus object.
1134          */
1135         function delete( $reason, $suppress = false ) {
1136                 $this->lock();
1137
1138                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1139                 $batch->addCurrent();
1140
1141                 # Get old version relative paths
1142                 $dbw = $this->repo->getMasterDB();
1143                 $result = $dbw->select( 'oldimage',
1144                         array( 'oi_archive_name' ),
1145                         array( 'oi_name' => $this->getName() ) );
1146                 foreach ( $result as $row ) {
1147                         $batch->addOld( $row->oi_archive_name );
1148                 }
1149                 $status = $batch->execute();
1150
1151                 if ( $status->ok ) {
1152                         // Update site_stats
1153                         $site_stats = $dbw->tableName( 'site_stats' );
1154                         $dbw->query( "UPDATE $site_stats SET ss_images=ss_images-1", __METHOD__ );
1155                         $this->purgeEverything();
1156                 }
1157
1158                 $this->unlock();
1159
1160                 return $status;
1161         }
1162
1163         /**
1164          * Delete an old version of the file.
1165          *
1166          * Moves the file into an archive directory (or deletes it)
1167          * and removes the database row.
1168          *
1169          * Cache purging is done; logging is caller's responsibility.
1170          *
1171          * @param $archiveName String
1172          * @param $reason String
1173          * @param $suppress Boolean
1174          * @throws MWException or FSException on database or file store failure
1175          * @return FileRepoStatus object.
1176          */
1177         function deleteOld( $archiveName, $reason, $suppress = false ) {
1178                 $this->lock();
1179
1180                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1181                 $batch->addOld( $archiveName );
1182                 $status = $batch->execute();
1183
1184                 $this->unlock();
1185
1186                 if ( $status->ok ) {
1187                         $this->purgeDescription();
1188                         $this->purgeHistory();
1189                 }
1190
1191                 return $status;
1192         }
1193
1194         /**
1195          * Restore all or specified deleted revisions to the given file.
1196          * Permissions and logging are left to the caller.
1197          *
1198          * May throw database exceptions on error.
1199          *
1200          * @param $versions set of record ids of deleted items to restore,
1201          *                    or empty to restore all revisions.
1202          * @param $unsuppress Boolean
1203          * @return FileRepoStatus
1204          */
1205         function restore( $versions = array(), $unsuppress = false ) {
1206                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1207
1208                 if ( !$versions ) {
1209                         $batch->addAll();
1210                 } else {
1211                         $batch->addIds( $versions );
1212                 }
1213
1214                 $status = $batch->execute();
1215
1216                 if ( !$status->isGood() ) {
1217                         return $status;
1218                 }
1219
1220                 $cleanupStatus = $batch->cleanup();
1221                 $cleanupStatus->successCount = 0;
1222                 $cleanupStatus->failCount = 0;
1223                 $status->merge( $cleanupStatus );
1224
1225                 return $status;
1226         }
1227
1228         /** isMultipage inherited */
1229         /** pageCount inherited */
1230         /** scaleHeight inherited */
1231         /** getImageSize inherited */
1232
1233         /**
1234          * Get the URL of the file description page.
1235          */
1236         function getDescriptionUrl() {
1237                 return $this->title->getLocalUrl();
1238         }
1239
1240         /**
1241          * Get the HTML text of the description page
1242          * This is not used by ImagePage for local files, since (among other things)
1243          * it skips the parser cache.
1244          */
1245         function getDescriptionText() {
1246                 global $wgParser;
1247                 $revision = Revision::newFromTitle( $this->title );
1248                 if ( !$revision ) return false;
1249                 $text = $revision->getText();
1250                 if ( !$text ) return false;
1251                 $pout = $wgParser->parse( $text, $this->title, new ParserOptions() );
1252                 return $pout->getText();
1253         }
1254
1255         function getDescription() {
1256                 $this->load();
1257                 return $this->description;
1258         }
1259
1260         function getTimestamp() {
1261                 $this->load();
1262                 return $this->timestamp;
1263         }
1264
1265         function getSha1() {
1266                 $this->load();
1267                 // Initialise now if necessary
1268                 if ( $this->sha1 == '' && $this->fileExists ) {
1269                         $this->sha1 = File::sha1Base36( $this->getPath() );
1270                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1271                                 $dbw = $this->repo->getMasterDB();
1272                                 $dbw->update( 'image',
1273                                         array( 'img_sha1' => $this->sha1 ),
1274                                         array( 'img_name' => $this->getName() ),
1275                                         __METHOD__ );
1276                                 $this->saveToCache();
1277                         }
1278                 }
1279
1280                 return $this->sha1;
1281         }
1282
1283         /**
1284          * Start a transaction and lock the image for update
1285          * Increments a reference counter if the lock is already held
1286          * @return boolean True if the image exists, false otherwise
1287          */
1288         function lock() {
1289                 $dbw = $this->repo->getMasterDB();
1290
1291                 if ( !$this->locked ) {
1292                         $dbw->begin();
1293                         $this->locked++;
1294                 }
1295
1296                 return $dbw->selectField( 'image', '1', array( 'img_name' => $this->getName() ), __METHOD__ );
1297         }
1298
1299         /**
1300          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1301          * the transaction and thereby releases the image lock.
1302          */
1303         function unlock() {
1304                 if ( $this->locked ) {
1305                         --$this->locked;
1306                         if ( !$this->locked ) {
1307                                 $dbw = $this->repo->getMasterDB();
1308                                 $dbw->commit();
1309                         }
1310                 }
1311         }
1312
1313         /**
1314          * Roll back the DB transaction and mark the image unlocked
1315          */
1316         function unlockAndRollback() {
1317                 $this->locked = false;
1318                 $dbw = $this->repo->getMasterDB();
1319                 $dbw->rollback();
1320         }
1321 } // LocalFile class
1322
1323 # ------------------------------------------------------------------------------
1324
1325 /**
1326  * Helper class for file deletion
1327  * @ingroup FileRepo
1328  */
1329 class LocalFileDeleteBatch {
1330
1331         /**
1332          * @var LocalFile
1333          */
1334         var $file;
1335
1336         var $reason, $srcRels = array(), $archiveUrls = array(), $deletionBatch, $suppress;
1337         var $status;
1338
1339         function __construct( File $file, $reason = '', $suppress = false ) {
1340                 $this->file = $file;
1341                 $this->reason = $reason;
1342                 $this->suppress = $suppress;
1343                 $this->status = $file->repo->newGood();
1344         }
1345
1346         function addCurrent() {
1347                 $this->srcRels['.'] = $this->file->getRel();
1348         }
1349
1350         function addOld( $oldName ) {
1351                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
1352                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
1353         }
1354
1355         function getOldRels() {
1356                 if ( !isset( $this->srcRels['.'] ) ) {
1357                         $oldRels =& $this->srcRels;
1358                         $deleteCurrent = false;
1359                 } else {
1360                         $oldRels = $this->srcRels;
1361                         unset( $oldRels['.'] );
1362                         $deleteCurrent = true;
1363                 }
1364
1365                 return array( $oldRels, $deleteCurrent );
1366         }
1367
1368         /*protected*/ function getHashes() {
1369                 $hashes = array();
1370                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1371
1372                 if ( $deleteCurrent ) {
1373                         $hashes['.'] = $this->file->getSha1();
1374                 }
1375
1376                 if ( count( $oldRels ) ) {
1377                         $dbw = $this->file->repo->getMasterDB();
1378                         $res = $dbw->select(
1379                                 'oldimage',
1380                                 array( 'oi_archive_name', 'oi_sha1' ),
1381                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1382                                 __METHOD__
1383                         );
1384
1385                         foreach ( $res as $row ) {
1386                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
1387                                         // Get the hash from the file
1388                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
1389                                         $props = $this->file->repo->getFileProps( $oldUrl );
1390
1391                                         if ( $props['fileExists'] ) {
1392                                                 // Upgrade the oldimage row
1393                                                 $dbw->update( 'oldimage',
1394                                                         array( 'oi_sha1' => $props['sha1'] ),
1395                                                         array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ),
1396                                                         __METHOD__ );
1397                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
1398                                         } else {
1399                                                 $hashes[$row->oi_archive_name] = false;
1400                                         }
1401                                 } else {
1402                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
1403                                 }
1404                         }
1405                 }
1406
1407                 $missing = array_diff_key( $this->srcRels, $hashes );
1408
1409                 foreach ( $missing as $name => $rel ) {
1410                         $this->status->error( 'filedelete-old-unregistered', $name );
1411                 }
1412
1413                 foreach ( $hashes as $name => $hash ) {
1414                         if ( !$hash ) {
1415                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
1416                                 unset( $hashes[$name] );
1417                         }
1418                 }
1419
1420                 return $hashes;
1421         }
1422
1423         function doDBInserts() {
1424                 global $wgUser;
1425
1426                 $dbw = $this->file->repo->getMasterDB();
1427                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
1428                 $encUserId = $dbw->addQuotes( $wgUser->getId() );
1429                 $encReason = $dbw->addQuotes( $this->reason );
1430                 $encGroup = $dbw->addQuotes( 'deleted' );
1431                 $ext = $this->file->getExtension();
1432                 $dotExt = $ext === '' ? '' : ".$ext";
1433                 $encExt = $dbw->addQuotes( $dotExt );
1434                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1435
1436                 // Bitfields to further suppress the content
1437                 if ( $this->suppress ) {
1438                         $bitfield = 0;
1439                         // This should be 15...
1440                         $bitfield |= Revision::DELETED_TEXT;
1441                         $bitfield |= Revision::DELETED_COMMENT;
1442                         $bitfield |= Revision::DELETED_USER;
1443                         $bitfield |= Revision::DELETED_RESTRICTED;
1444                 } else {
1445                         $bitfield = 'oi_deleted';
1446                 }
1447
1448                 if ( $deleteCurrent ) {
1449                         $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) );
1450                         $where = array( 'img_name' => $this->file->getName() );
1451                         $dbw->insertSelect( 'filearchive', 'image',
1452                                 array(
1453                                         'fa_storage_group' => $encGroup,
1454                                         'fa_storage_key'   => "CASE WHEN img_sha1='' THEN '' ELSE $concat END",
1455                                         'fa_deleted_user'      => $encUserId,
1456                                         'fa_deleted_timestamp' => $encTimestamp,
1457                                         'fa_deleted_reason'    => $encReason,
1458                                         'fa_deleted'               => $this->suppress ? $bitfield : 0,
1459
1460                                         'fa_name'         => 'img_name',
1461                                         'fa_archive_name' => 'NULL',
1462                                         'fa_size'         => 'img_size',
1463                                         'fa_width'        => 'img_width',
1464                                         'fa_height'       => 'img_height',
1465                                         'fa_metadata'     => 'img_metadata',
1466                                         'fa_bits'         => 'img_bits',
1467                                         'fa_media_type'   => 'img_media_type',
1468                                         'fa_major_mime'   => 'img_major_mime',
1469                                         'fa_minor_mime'   => 'img_minor_mime',
1470                                         'fa_description'  => 'img_description',
1471                                         'fa_user'         => 'img_user',
1472                                         'fa_user_text'    => 'img_user_text',
1473                                         'fa_timestamp'    => 'img_timestamp'
1474                                 ), $where, __METHOD__ );
1475                 }
1476
1477                 if ( count( $oldRels ) ) {
1478                         $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) );
1479                         $where = array(
1480                                 'oi_name' => $this->file->getName(),
1481                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')' );
1482                         $dbw->insertSelect( 'filearchive', 'oldimage',
1483                                 array(
1484                                         'fa_storage_group' => $encGroup,
1485                                         'fa_storage_key'   => "CASE WHEN oi_sha1='' THEN '' ELSE $concat END",
1486                                         'fa_deleted_user'      => $encUserId,
1487                                         'fa_deleted_timestamp' => $encTimestamp,
1488                                         'fa_deleted_reason'    => $encReason,
1489                                         'fa_deleted'               => $this->suppress ? $bitfield : 'oi_deleted',
1490
1491                                         'fa_name'         => 'oi_name',
1492                                         'fa_archive_name' => 'oi_archive_name',
1493                                         'fa_size'         => 'oi_size',
1494                                         'fa_width'        => 'oi_width',
1495                                         'fa_height'       => 'oi_height',
1496                                         'fa_metadata'     => 'oi_metadata',
1497                                         'fa_bits'         => 'oi_bits',
1498                                         'fa_media_type'   => 'oi_media_type',
1499                                         'fa_major_mime'   => 'oi_major_mime',
1500                                         'fa_minor_mime'   => 'oi_minor_mime',
1501                                         'fa_description'  => 'oi_description',
1502                                         'fa_user'         => 'oi_user',
1503                                         'fa_user_text'    => 'oi_user_text',
1504                                         'fa_timestamp'    => 'oi_timestamp',
1505                                         'fa_deleted'      => $bitfield
1506                                 ), $where, __METHOD__ );
1507                 }
1508         }
1509
1510         function doDBDeletes() {
1511                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1512
1513                 // https://bugzilla.wikimedia.org/show_bug.cgi?id=13921
1514                 // Create and use a new loadBalancer object, to prevent "1205: Lock wait timeout exceeded;"
1515                 $lb = wfGetLBFactory()->newMainLB();
1516                 $dbw = $lb->getConnection( DB_MASTER );
1517
1518                 if ( count( $oldRels ) ) {
1519                         $dbw->delete( 'oldimage',
1520                                 array(
1521                                         'oi_name' => $this->file->getName(),
1522                                         'oi_archive_name' => array_keys( $oldRels )
1523                                 ), __METHOD__ );
1524                 }
1525
1526                 if ( $deleteCurrent ) {
1527                         $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ );
1528                 }
1529
1530                 $lb->commitMasterChanges();
1531                 $lb->closeAll();
1532         }
1533
1534         /**
1535          * Run the transaction
1536          */
1537         function execute() {
1538                 global $wgUseSquid;
1539                 wfProfileIn( __METHOD__ );
1540
1541                 $this->file->lock();
1542                 // Leave private files alone
1543                 $privateFiles = array();
1544                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1545                 $dbw = $this->file->repo->getMasterDB();
1546
1547                 if ( !empty( $oldRels ) ) {
1548                         $res = $dbw->select( 'oldimage',
1549                                 array( 'oi_archive_name' ),
1550                                 array( 'oi_name' => $this->file->getName(),
1551                                         'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1552                                         $dbw->bitAnd( 'oi_deleted', File::DELETED_FILE ) => File::DELETED_FILE ),
1553                                 __METHOD__ );
1554
1555                         foreach ( $res as $row ) {
1556                                 $privateFiles[$row->oi_archive_name] = 1;
1557                         }
1558                 }
1559                 // Prepare deletion batch
1560                 $hashes = $this->getHashes();
1561                 $this->deletionBatch = array();
1562                 $ext = $this->file->getExtension();
1563                 $dotExt = $ext === '' ? '' : ".$ext";
1564
1565                 foreach ( $this->srcRels as $name => $srcRel ) {
1566                         // Skip files that have no hash (missing source).
1567                         // Keep private files where they are.
1568                         if ( isset( $hashes[$name] ) && !array_key_exists( $name, $privateFiles ) ) {
1569                                 $hash = $hashes[$name];
1570                                 $key = $hash . $dotExt;
1571                                 $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1572                                 $this->deletionBatch[$name] = array( $srcRel, $dstRel );
1573                         }
1574                 }
1575
1576                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
1577                 // We acquire this lock by running the inserts now, before the file operations.
1578                 //
1579                 // This potentially has poor lock contention characteristics -- an alternative
1580                 // scheme would be to insert stub filearchive entries with no fa_name and commit
1581                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
1582                 $this->doDBInserts();
1583
1584                 // Removes non-existent file from the batch, so we don't get errors.
1585                 $this->deletionBatch = $this->removeNonexistentFiles( $this->deletionBatch );
1586
1587                 // Execute the file deletion batch
1588                 $status = $this->file->repo->deleteBatch( $this->deletionBatch );
1589
1590                 if ( !$status->isGood() ) {
1591                         $this->status->merge( $status );
1592                 }
1593
1594                 if ( !$this->status->ok ) {
1595                         // Critical file deletion error
1596                         // Roll back inserts, release lock and abort
1597                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
1598                         $this->file->unlockAndRollback();
1599                         wfProfileOut( __METHOD__ );
1600                         return $this->status;
1601                 }
1602
1603                 // Purge squid
1604                 if ( $wgUseSquid ) {
1605                         $urls = array();
1606
1607                         foreach ( $this->srcRels as $srcRel ) {
1608                                 $urlRel = str_replace( '%2F', '/', rawurlencode( $srcRel ) );
1609                                 $urls[] = $this->file->repo->getZoneUrl( 'public' ) . '/' . $urlRel;
1610                         }
1611                         SquidUpdate::purge( $urls );
1612                 }
1613
1614                 // Delete image/oldimage rows
1615                 $this->doDBDeletes();
1616
1617                 // Commit and return
1618                 $this->file->unlock();
1619                 wfProfileOut( __METHOD__ );
1620
1621                 return $this->status;
1622         }
1623
1624         /**
1625          * Removes non-existent files from a deletion batch.
1626          */
1627         function removeNonexistentFiles( $batch ) {
1628                 $files = $newBatch = array();
1629
1630                 foreach ( $batch as $batchItem ) {
1631                         list( $src, $dest ) = $batchItem;
1632                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
1633                 }
1634
1635                 $result = $this->file->repo->fileExistsBatch( $files, FSRepo::FILES_ONLY );
1636
1637                 foreach ( $batch as $batchItem ) {
1638                         if ( $result[$batchItem[0]] ) {
1639                                 $newBatch[] = $batchItem;
1640                         }
1641                 }
1642
1643                 return $newBatch;
1644         }
1645 }
1646
1647 # ------------------------------------------------------------------------------
1648
1649 /**
1650  * Helper class for file undeletion
1651  * @ingroup FileRepo
1652  */
1653 class LocalFileRestoreBatch {
1654         /**
1655          * @var LocalFile
1656          */
1657         var $file;
1658
1659         var $cleanupBatch, $ids, $all, $unsuppress = false;
1660
1661         function __construct( File $file, $unsuppress = false ) {
1662                 $this->file = $file;
1663                 $this->cleanupBatch = $this->ids = array();
1664                 $this->ids = array();
1665                 $this->unsuppress = $unsuppress;
1666         }
1667
1668         /**
1669          * Add a file by ID
1670          */
1671         function addId( $fa_id ) {
1672                 $this->ids[] = $fa_id;
1673         }
1674
1675         /**
1676          * Add a whole lot of files by ID
1677          */
1678         function addIds( $ids ) {
1679                 $this->ids = array_merge( $this->ids, $ids );
1680         }
1681
1682         /**
1683          * Add all revisions of the file
1684          */
1685         function addAll() {
1686                 $this->all = true;
1687         }
1688
1689         /**
1690          * Run the transaction, except the cleanup batch.
1691          * The cleanup batch should be run in a separate transaction, because it locks different
1692          * rows and there's no need to keep the image row locked while it's acquiring those locks
1693          * The caller may have its own transaction open.
1694          * So we save the batch and let the caller call cleanup()
1695          */
1696         function execute() {
1697                 global $wgLang;
1698
1699                 if ( !$this->all && !$this->ids ) {
1700                         // Do nothing
1701                         return $this->file->repo->newGood();
1702                 }
1703
1704                 $exists = $this->file->lock();
1705                 $dbw = $this->file->repo->getMasterDB();
1706                 $status = $this->file->repo->newGood();
1707
1708                 // Fetch all or selected archived revisions for the file,
1709                 // sorted from the most recent to the oldest.
1710                 $conditions = array( 'fa_name' => $this->file->getName() );
1711
1712                 if ( !$this->all ) {
1713                         $conditions[] = 'fa_id IN (' . $dbw->makeList( $this->ids ) . ')';
1714                 }
1715
1716                 $result = $dbw->select( 'filearchive', '*',
1717                         $conditions,
1718                         __METHOD__,
1719                         array( 'ORDER BY' => 'fa_timestamp DESC' )
1720                 );
1721
1722                 $idsPresent = array();
1723                 $storeBatch = array();
1724                 $insertBatch = array();
1725                 $insertCurrent = false;
1726                 $deleteIds = array();
1727                 $first = true;
1728                 $archiveNames = array();
1729
1730                 foreach ( $result as $row ) {
1731                         $idsPresent[] = $row->fa_id;
1732
1733                         if ( $row->fa_name != $this->file->getName() ) {
1734                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
1735                                 $status->failCount++;
1736                                 continue;
1737                         }
1738
1739                         if ( $row->fa_storage_key == '' ) {
1740                                 // Revision was missing pre-deletion
1741                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
1742                                 $status->failCount++;
1743                                 continue;
1744                         }
1745
1746                         $deletedRel = $this->file->repo->getDeletedHashPath( $row->fa_storage_key ) . $row->fa_storage_key;
1747                         $deletedUrl = $this->file->repo->getVirtualUrl() . '/deleted/' . $deletedRel;
1748
1749                         $sha1 = substr( $row->fa_storage_key, 0, strcspn( $row->fa_storage_key, '.' ) );
1750
1751                         # Fix leading zero
1752                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
1753                                 $sha1 = substr( $sha1, 1 );
1754                         }
1755
1756                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
1757                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
1758                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
1759                                 || is_null( $row->fa_metadata ) ) {
1760                                 // Refresh our metadata
1761                                 // Required for a new current revision; nice for older ones too. :)
1762                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
1763                         } else {
1764                                 $props = array(
1765                                         'minor_mime' => $row->fa_minor_mime,
1766                                         'major_mime' => $row->fa_major_mime,
1767                                         'media_type' => $row->fa_media_type,
1768                                         'metadata'   => $row->fa_metadata
1769                                 );
1770                         }
1771
1772                         if ( $first && !$exists ) {
1773                                 // This revision will be published as the new current version
1774                                 $destRel = $this->file->getRel();
1775                                 $insertCurrent = array(
1776                                         'img_name'        => $row->fa_name,
1777                                         'img_size'        => $row->fa_size,
1778                                         'img_width'       => $row->fa_width,
1779                                         'img_height'      => $row->fa_height,
1780                                         'img_metadata'    => $props['metadata'],
1781                                         'img_bits'        => $row->fa_bits,
1782                                         'img_media_type'  => $props['media_type'],
1783                                         'img_major_mime'  => $props['major_mime'],
1784                                         'img_minor_mime'  => $props['minor_mime'],
1785                                         'img_description' => $row->fa_description,
1786                                         'img_user'        => $row->fa_user,
1787                                         'img_user_text'   => $row->fa_user_text,
1788                                         'img_timestamp'   => $row->fa_timestamp,
1789                                         'img_sha1'        => $sha1
1790                                 );
1791
1792                                 // The live (current) version cannot be hidden!
1793                                 if ( !$this->unsuppress && $row->fa_deleted ) {
1794                                         $storeBatch[] = array( $deletedUrl, 'public', $destRel );
1795                                         $this->cleanupBatch[] = $row->fa_storage_key;
1796                                 }
1797                         } else {
1798                                 $archiveName = $row->fa_archive_name;
1799
1800                                 if ( $archiveName == '' ) {
1801                                         // This was originally a current version; we
1802                                         // have to devise a new archive name for it.
1803                                         // Format is <timestamp of archiving>!<name>
1804                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
1805
1806                                         do {
1807                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
1808                                                 $timestamp++;
1809                                         } while ( isset( $archiveNames[$archiveName] ) );
1810                                 }
1811
1812                                 $archiveNames[$archiveName] = true;
1813                                 $destRel = $this->file->getArchiveRel( $archiveName );
1814                                 $insertBatch[] = array(
1815                                         'oi_name'         => $row->fa_name,
1816                                         'oi_archive_name' => $archiveName,
1817                                         'oi_size'         => $row->fa_size,
1818                                         'oi_width'        => $row->fa_width,
1819                                         'oi_height'       => $row->fa_height,
1820                                         'oi_bits'         => $row->fa_bits,
1821                                         'oi_description'  => $row->fa_description,
1822                                         'oi_user'         => $row->fa_user,
1823                                         'oi_user_text'    => $row->fa_user_text,
1824                                         'oi_timestamp'    => $row->fa_timestamp,
1825                                         'oi_metadata'     => $props['metadata'],
1826                                         'oi_media_type'   => $props['media_type'],
1827                                         'oi_major_mime'   => $props['major_mime'],
1828                                         'oi_minor_mime'   => $props['minor_mime'],
1829                                         'oi_deleted'      => $this->unsuppress ? 0 : $row->fa_deleted,
1830                                         'oi_sha1'         => $sha1 );
1831                         }
1832
1833                         $deleteIds[] = $row->fa_id;
1834
1835                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
1836                                 // private files can stay where they are
1837                                 $status->successCount++;
1838                         } else {
1839                                 $storeBatch[] = array( $deletedUrl, 'public', $destRel );
1840                                 $this->cleanupBatch[] = $row->fa_storage_key;
1841                         }
1842
1843                         $first = false;
1844                 }
1845
1846                 unset( $result );
1847
1848                 // Add a warning to the status object for missing IDs
1849                 $missingIds = array_diff( $this->ids, $idsPresent );
1850
1851                 foreach ( $missingIds as $id ) {
1852                         $status->error( 'undelete-missing-filearchive', $id );
1853                 }
1854
1855                 // Remove missing files from batch, so we don't get errors when undeleting them
1856                 $storeBatch = $this->removeNonexistentFiles( $storeBatch );
1857
1858                 // Run the store batch
1859                 // Use the OVERWRITE_SAME flag to smooth over a common error
1860                 $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
1861                 $status->merge( $storeStatus );
1862
1863                 if ( !$status->isGood() ) {
1864                         // Even if some files could be copied, fail entirely as that is the
1865                         // easiest thing to do without data loss
1866                         $this->cleanupFailedBatch( $storeStatus, $storeBatch );
1867                         $status->ok = false;
1868                         $this->file->unlock();
1869
1870                         return $status;
1871                 }
1872
1873                 // Run the DB updates
1874                 // Because we have locked the image row, key conflicts should be rare.
1875                 // If they do occur, we can roll back the transaction at this time with
1876                 // no data loss, but leaving unregistered files scattered throughout the
1877                 // public zone.
1878                 // This is not ideal, which is why it's important to lock the image row.
1879                 if ( $insertCurrent ) {
1880                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
1881                 }
1882
1883                 if ( $insertBatch ) {
1884                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
1885                 }
1886
1887                 if ( $deleteIds ) {
1888                         $dbw->delete( 'filearchive',
1889                                 array( 'fa_id IN (' . $dbw->makeList( $deleteIds ) . ')' ),
1890                                 __METHOD__ );
1891                 }
1892
1893                 // If store batch is empty (all files are missing), deletion is to be considered successful
1894                 if ( $status->successCount > 0 || !$storeBatch ) {
1895                         if ( !$exists ) {
1896                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
1897
1898                                 // Update site_stats
1899                                 $site_stats = $dbw->tableName( 'site_stats' );
1900                                 $dbw->query( "UPDATE $site_stats SET ss_images=ss_images+1", __METHOD__ );
1901
1902                                 $this->file->purgeEverything();
1903                         } else {
1904                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
1905                                 $this->file->purgeDescription();
1906                                 $this->file->purgeHistory();
1907                         }
1908                 }
1909
1910                 $this->file->unlock();
1911
1912                 return $status;
1913         }
1914
1915         /**
1916          * Removes non-existent files from a store batch.
1917          */
1918         function removeNonexistentFiles( $triplets ) {
1919                 $files = $filteredTriplets = array();
1920                 foreach ( $triplets as $file )
1921                         $files[$file[0]] = $file[0];
1922
1923                 $result = $this->file->repo->fileExistsBatch( $files, FSRepo::FILES_ONLY );
1924
1925                 foreach ( $triplets as $file ) {
1926                         if ( $result[$file[0]] ) {
1927                                 $filteredTriplets[] = $file;
1928                         }
1929                 }
1930
1931                 return $filteredTriplets;
1932         }
1933
1934         /**
1935          * Removes non-existent files from a cleanup batch.
1936          */
1937         function removeNonexistentFromCleanup( $batch ) {
1938                 $files = $newBatch = array();
1939                 $repo = $this->file->repo;
1940
1941                 foreach ( $batch as $file ) {
1942                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
1943                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
1944                 }
1945
1946                 $result = $repo->fileExistsBatch( $files, FSRepo::FILES_ONLY );
1947
1948                 foreach ( $batch as $file ) {
1949                         if ( $result[$file] ) {
1950                                 $newBatch[] = $file;
1951                         }
1952                 }
1953
1954                 return $newBatch;
1955         }
1956
1957         /**
1958          * Delete unused files in the deleted zone.
1959          * This should be called from outside the transaction in which execute() was called.
1960          */
1961         function cleanup() {
1962                 if ( !$this->cleanupBatch ) {
1963                         return $this->file->repo->newGood();
1964                 }
1965
1966                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
1967
1968                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
1969
1970                 return $status;
1971         }
1972
1973         function cleanupFailedBatch( $storeStatus, $storeBatch ) {
1974                 $cleanupBatch = array();
1975
1976                 foreach ( $storeStatus->success as $i => $success ) {
1977                         if ( $success ) {
1978                                 $cleanupBatch[] = array( $storeBatch[$i][1], $storeBatch[$i][1] );
1979                         }
1980                 }
1981                 $this->file->repo->cleanupBatch( $cleanupBatch );
1982         }
1983 }
1984
1985 # ------------------------------------------------------------------------------
1986
1987 /**
1988  * Helper class for file movement
1989  * @ingroup FileRepo
1990  */
1991 class LocalFileMoveBatch {
1992         var $file, $cur, $olds, $oldCount, $archive, $target, $db;
1993
1994         function __construct( File $file, Title $target ) {
1995                 $this->file = $file;
1996                 $this->target = $target;
1997                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
1998                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
1999                 $this->oldName = $this->file->getName();
2000                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2001                 $this->oldRel = $this->oldHash . $this->oldName;
2002                 $this->newRel = $this->newHash . $this->newName;
2003                 $this->db = $file->repo->getMasterDb();
2004         }
2005
2006         /**
2007          * Add the current image to the batch
2008          */
2009         function addCurrent() {
2010                 $this->cur = array( $this->oldRel, $this->newRel );
2011         }
2012
2013         /**
2014          * Add the old versions of the image to the batch
2015          */
2016         function addOlds() {
2017                 $archiveBase = 'archive';
2018                 $this->olds = array();
2019                 $this->oldCount = 0;
2020
2021                 $result = $this->db->select( 'oldimage',
2022                         array( 'oi_archive_name', 'oi_deleted' ),
2023                         array( 'oi_name' => $this->oldName ),
2024                         __METHOD__
2025                 );
2026
2027                 foreach ( $result as $row ) {
2028                         $oldName = $row->oi_archive_name;
2029                         $bits = explode( '!', $oldName, 2 );
2030
2031                         if ( count( $bits ) != 2 ) {
2032                                 wfDebug( "Invalid old file name: $oldName \n" );
2033                                 continue;
2034                         }
2035
2036                         list( $timestamp, $filename ) = $bits;
2037
2038                         if ( $this->oldName != $filename ) {
2039                                 wfDebug( "Invalid old file name: $oldName \n" );
2040                                 continue;
2041                         }
2042
2043                         $this->oldCount++;
2044
2045                         // Do we want to add those to oldCount?
2046                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2047                                 continue;
2048                         }
2049
2050                         $this->olds[] = array(
2051                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2052                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2053                         );
2054                 }
2055         }
2056
2057         /**
2058          * Perform the move.
2059          */
2060         function execute() {
2061                 $repo = $this->file->repo;
2062                 $status = $repo->newGood();
2063                 $triplets = $this->getMoveTriplets();
2064
2065                 $triplets = $this->removeNonexistentFiles( $triplets );
2066
2067                 // Copy the files into their new location
2068                 $statusMove = $repo->storeBatch( $triplets );
2069                 wfDebugLog( 'imagemove', "Moved files for {$this->file->name}: {$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2070                 if ( !$statusMove->isGood() ) {
2071                         wfDebugLog( 'imagemove', "Error in moving files: " . $statusMove->getWikiText() );
2072                         $this->cleanupTarget( $triplets );
2073                         $statusMove->ok = false;
2074                         return $statusMove;
2075                 }
2076
2077                 $this->db->begin();
2078                 $statusDb = $this->doDBUpdates();
2079                 wfDebugLog( 'imagemove', "Renamed {$this->file->name} in database: {$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2080                 if ( !$statusDb->isGood() ) {
2081                         $this->db->rollback();
2082                         // Something went wrong with the DB updates, so remove the target files
2083                         $this->cleanupTarget( $triplets );
2084                         $statusDb->ok = false;
2085                         return $statusDb;
2086                 }
2087                 $this->db->commit();
2088
2089                 // Everything went ok, remove the source files
2090                 $this->cleanupSource( $triplets );
2091
2092                 $status->merge( $statusDb );
2093                 $status->merge( $statusMove );
2094
2095                 return $status;
2096         }
2097
2098         /**
2099          * Do the database updates and return a new FileRepoStatus indicating how
2100          * many rows where updated.
2101          *
2102          * @return FileRepoStatus
2103          */
2104         function doDBUpdates() {
2105                 $repo = $this->file->repo;
2106                 $status = $repo->newGood();
2107                 $dbw = $this->db;
2108
2109                 // Update current image
2110                 $dbw->update(
2111                         'image',
2112                         array( 'img_name' => $this->newName ),
2113                         array( 'img_name' => $this->oldName ),
2114                         __METHOD__
2115                 );
2116
2117                 if ( $dbw->affectedRows() ) {
2118                         $status->successCount++;
2119                 } else {
2120                         $status->failCount++;
2121                         $status->fatal( 'imageinvalidfilename' );
2122                         return $status;
2123                 }
2124
2125                 // Update old images
2126                 $dbw->update(
2127                         'oldimage',
2128                         array(
2129                                 'oi_name' => $this->newName,
2130                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name', $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2131                         ),
2132                         array( 'oi_name' => $this->oldName ),
2133                         __METHOD__
2134                 );
2135
2136                 $affected = $dbw->affectedRows();
2137                 $total = $this->oldCount;
2138                 $status->successCount += $affected;
2139                 $status->failCount += $total - $affected;
2140                 if ( $status->failCount ) {
2141                         $status->error( 'imageinvalidfilename' );
2142                 }
2143
2144                 return $status;
2145         }
2146
2147         /**
2148          * Generate triplets for FSRepo::storeBatch().
2149          */
2150         function getMoveTriplets() {
2151                 $moves = array_merge( array( $this->cur ), $this->olds );
2152                 $triplets = array();    // The format is: (srcUrl, destZone, destUrl)
2153
2154                 foreach ( $moves as $move ) {
2155                         // $move: (oldRelativePath, newRelativePath)
2156                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2157                         $triplets[] = array( $srcUrl, 'public', $move[1] );
2158                         wfDebugLog( 'imagemove', "Generated move triplet for {$this->file->name}: {$srcUrl} :: public :: {$move[1]}" );
2159                 }
2160
2161                 return $triplets;
2162         }
2163
2164         /**
2165          * Removes non-existent files from move batch.
2166          */
2167         function removeNonexistentFiles( $triplets ) {
2168                 $files = array();
2169
2170                 foreach ( $triplets as $file ) {
2171                         $files[$file[0]] = $file[0];
2172                 }
2173
2174                 $result = $this->file->repo->fileExistsBatch( $files, FSRepo::FILES_ONLY );
2175                 $filteredTriplets = array();
2176
2177                 foreach ( $triplets as $file ) {
2178                         if ( $result[$file[0]] ) {
2179                                 $filteredTriplets[] = $file;
2180                         } else {
2181                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
2182                         }
2183                 }
2184
2185                 return $filteredTriplets;
2186         }
2187
2188         /**
2189          * Cleanup a partially moved array of triplets by deleting the target
2190          * files. Called if something went wrong half way.
2191          */
2192         function cleanupTarget( $triplets ) {
2193                 // Create dest pairs from the triplets
2194                 $pairs = array();
2195                 foreach ( $triplets as $triplet ) {
2196                         $pairs[] = array( $triplet[1], $triplet[2] );
2197                 }
2198
2199                 $this->file->repo->cleanupBatch( $pairs );
2200         }
2201
2202         /**
2203          * Cleanup a fully moved array of triplets by deleting the source files.
2204          * Called at the end of the move process if everything else went ok.
2205          */
2206         function cleanupSource( $triplets ) {
2207                 // Create source file names from the triplets
2208                 $files = array();
2209                 foreach ( $triplets as $triplet ) {
2210                         $files[] = $triplet[0];
2211                 }
2212
2213                 $this->file->repo->cleanupBatch( $files );
2214         }
2215 }