includes/filerepo/file/LocalFile.php

   1 <?php
   2 /**
   3  * Local file in the wiki's own database.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup FileAbstraction
  22  */
  23
  24 /**
  25  * Bump this number when serialized cache records may be incompatible.
  26  */
  27 define( 'MW_FILE_VERSION', 8 );
  28
  29 /**
  30  * Class to represent a local file in the wiki's own database
  31  *
  32  * Provides methods to retrieve paths (physical, logical, URL),
  33  * to generate image thumbnails or for uploading.
  34  *
  35  * Note that only the repo object knows what its file class is called. You should
  36  * never name a file class explictly outside of the repo class. Instead use the
  37  * repo's factory functions to generate file objects, for example:
  38  *
  39  * RepoGroup::singleton()->getLocalRepo()->newFile($title);
  40  *
  41  * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
  42  * in most cases.
  43  *
  44  * @ingroup FileAbstraction
  45  */
  46 class LocalFile extends File {
  47         const CACHE_FIELD_MAX_LEN = 1000;
  48
  49         /**#@+
  50          * @private
  51          */
  52         var
  53                 $fileExists,       # does the file exist on disk? (loadFromXxx)
  54                 $historyLine,      # Number of line to return by nextHistoryLine() (constructor)
  55                 $historyRes,       # result of the query for the file's history (nextHistoryLine)
  56                 $width,            # \
  57                 $height,           #  |
  58                 $bits,             #   --- returned by getimagesize (loadFromXxx)
  59                 $attr,             # /
  60                 $media_type,       # MEDIATYPE_xxx (bitmap, drawing, audio...)
  61                 $mime,             # MIME type, determined by MimeMagic::guessMimeType
  62                 $major_mime,       # Major mime type
  63                 $minor_mime,       # Minor mime type
  64                 $size,             # Size in bytes (loadFromXxx)
  65                 $metadata,         # Handler-specific metadata
  66                 $timestamp,        # Upload timestamp
  67                 $sha1,             # SHA-1 base 36 content hash
  68                 $user, $user_text, # User, who uploaded the file
  69                 $description,      # Description of current revision of the file
  70                 $dataLoaded,       # Whether or not all this has been loaded from the database (loadFromXxx)
  71                 $upgraded,         # Whether the row was upgraded on load
  72                 $locked,           # True if the image row is locked
  73                 $missing,          # True if file is not present in file system. Not to be cached in memcached
  74                 $deleted;          # Bitfield akin to rev_deleted
  75
  76         /**#@-*/
  77
  78         /**
  79          * @var LocalRepo
  80          */
  81         var $repo;
  82
  83         protected $repoClass = 'LocalRepo';
  84
  85         /**
  86          * Create a LocalFile from a title
  87          * Do not call this except from inside a repo class.
  88          *
  89          * Note: $unused param is only here to avoid an E_STRICT
  90          *
  91          * @param $title
  92          * @param $repo
  93          * @param $unused
  94          *
  95          * @return LocalFile
  96          */
  97         static function newFromTitle( $title, $repo, $unused = null ) {
  98                 return new self( $title, $repo );
  99         }
 100
 101         /**
 102          * Create a LocalFile from a title
 103          * Do not call this except from inside a repo class.
 104          *
 105          * @param $row
 106          * @param $repo
 107          *
 108          * @return LocalFile
 109          */
 110         static function newFromRow( $row, $repo ) {
 111                 $title = Title::makeTitle( NS_FILE, $row->img_name );
 112                 $file = new self( $title, $repo );
 113                 $file->loadFromRow( $row );
 114
 115                 return $file;
 116         }
 117
 118         /**
 119          * Create a LocalFile from a SHA-1 key
 120          * Do not call this except from inside a repo class.
 121          *
 122          * @param $sha1 string base-36 SHA-1
 123          * @param $repo LocalRepo
 124          * @param string|bool $timestamp MW_timestamp (optional)
 125          *
 126          * @return bool|LocalFile
 127          */
 128         static function newFromKey( $sha1, $repo, $timestamp = false ) {
 129                 $dbr = $repo->getSlaveDB();
 130
 131                 $conds = array( 'img_sha1' => $sha1 );
 132                 if ( $timestamp ) {
 133                         $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
 134                 }
 135
 136                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
 137                 if ( $row ) {
 138                         return self::newFromRow( $row, $repo );
 139                 } else {
 140                         return false;
 141                 }
 142         }
 143
 144         /**
 145          * Fields in the image table
 146          * @return array
 147          */
 148         static function selectFields() {
 149                 return array(
 150                         'img_name',
 151                         'img_size',
 152                         'img_width',
 153                         'img_height',
 154                         'img_metadata',
 155                         'img_bits',
 156                         'img_media_type',
 157                         'img_major_mime',
 158                         'img_minor_mime',
 159                         'img_description',
 160                         'img_user',
 161                         'img_user_text',
 162                         'img_timestamp',
 163                         'img_sha1',
 164                 );
 165         }
 166
 167         /**
 168          * Constructor.
 169          * Do not call this except from inside a repo class.
 170          */
 171         function __construct( $title, $repo ) {
 172                 parent::__construct( $title, $repo );
 173
 174                 $this->metadata = '';
 175                 $this->historyLine = 0;
 176                 $this->historyRes = null;
 177                 $this->dataLoaded = false;
 178
 179                 $this->assertRepoDefined();
 180                 $this->assertTitleDefined();
 181         }
 182
 183         /**
 184          * Get the memcached key for the main data for this file, or false if
 185          * there is no access to the shared cache.
 186          * @return bool
 187          */
 188         function getCacheKey() {
 189                 $hashedName = md5( $this->getName() );
 190
 191                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 192         }
 193
 194         /**
 195          * Try to load file metadata from memcached. Returns true on success.
 196          * @return bool
 197          */
 198         function loadFromCache() {
 199                 global $wgMemc;
 200
 201                 wfProfileIn( __METHOD__ );
 202                 $this->dataLoaded = false;
 203                 $key = $this->getCacheKey();
 204
 205                 if ( !$key ) {
 206                         wfProfileOut( __METHOD__ );
 207                         return false;
 208                 }
 209
 210                 $cachedValues = $wgMemc->get( $key );
 211
 212                 // Check if the key existed and belongs to this version of MediaWiki
 213                 if ( isset( $cachedValues['version'] ) && ( $cachedValues['version'] == MW_FILE_VERSION ) ) {
 214                         wfDebug( "Pulling file metadata from cache key $key\n" );
 215                         $this->fileExists = $cachedValues['fileExists'];
 216                         if ( $this->fileExists ) {
 217                                 $this->setProps( $cachedValues );
 218                         }
 219                         $this->dataLoaded = true;
 220                 }
 221
 222                 if ( $this->dataLoaded ) {
 223                         wfIncrStats( 'image_cache_hit' );
 224                 } else {
 225                         wfIncrStats( 'image_cache_miss' );
 226                 }
 227
 228                 wfProfileOut( __METHOD__ );
 229                 return $this->dataLoaded;
 230         }
 231
 232         /**
 233          * Save the file metadata to memcached
 234          */
 235         function saveToCache() {
 236                 global $wgMemc;
 237
 238                 $this->load();
 239                 $key = $this->getCacheKey();
 240
 241                 if ( !$key ) {
 242                         return;
 243                 }
 244
 245                 $fields = $this->getCacheFields( '' );
 246                 $cache = array( 'version' => MW_FILE_VERSION );
 247                 $cache['fileExists'] = $this->fileExists;
 248
 249                 if ( $this->fileExists ) {
 250                         foreach ( $fields as $field ) {
 251                                 $cache[$field] = $this->$field;
 252                         }
 253                 }
 254
 255                 $wgMemc->set( $key, $cache, 60 * 60 * 24 * 7 ); // A week
 256         }
 257
 258         /**
 259          * Load metadata from the file itself
 260          */
 261         function loadFromFile() {
 262                 $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 263                 $this->setProps( $props );
 264         }
 265
 266         /**
 267          * @param $prefix string
 268          * @return array
 269          */
 270         function getCacheFields( $prefix = 'img_' ) {
 271                 static $fields = array( 'size', 'width', 'height', 'bits', 'media_type',
 272                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user', 'user_text', 'description' );
 273                 static $results = array();
 274
 275                 if ( $prefix == '' ) {
 276                         return $fields;
 277                 }
 278
 279                 if ( !isset( $results[$prefix] ) ) {
 280                         $prefixedFields = array();
 281                         foreach ( $fields as $field ) {
 282                                 $prefixedFields[] = $prefix . $field;
 283                         }
 284                         $results[$prefix] = $prefixedFields;
 285                 }
 286
 287                 return $results[$prefix];
 288         }
 289
 290         /**
 291          * Load file metadata from the DB
 292          */
 293         function loadFromDB() {
 294                 # Polymorphic function name to distinguish foreign and local fetches
 295                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 296                 wfProfileIn( $fname );
 297
 298                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 299                 $this->dataLoaded = true;
 300
 301                 $dbr = $this->repo->getMasterDB();
 302
 303                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 304                         array( 'img_name' => $this->getName() ), $fname );
 305
 306                 if ( $row ) {
 307                         $this->loadFromRow( $row );
 308                 } else {
 309                         $this->fileExists = false;
 310                 }
 311
 312                 wfProfileOut( $fname );
 313         }
 314
 315         /**
 316          * Decode a row from the database (either object or array) to an array
 317          * with timestamps and MIME types decoded, and the field prefix removed.
 318          * @param $row
 319          * @param $prefix string
 320          * @throws MWException
 321          * @return array
 322          */
 323         function decodeRow( $row, $prefix = 'img_' ) {
 324                 $array = (array)$row;
 325                 $prefixLength = strlen( $prefix );
 326
 327                 // Sanity check prefix once
 328                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 329                         throw new MWException( __METHOD__ .  ': incorrect $prefix parameter' );
 330                 }
 331
 332                 $decoded = array();
 333
 334                 foreach ( $array as $name => $value ) {
 335                         $decoded[substr( $name, $prefixLength )] = $value;
 336                 }
 337
 338                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 339
 340                 if ( empty( $decoded['major_mime'] ) ) {
 341                         $decoded['mime'] = 'unknown/unknown';
 342                 } else {
 343                         if ( !$decoded['minor_mime'] ) {
 344                                 $decoded['minor_mime'] = 'unknown';
 345                         }
 346                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 347                 }
 348
 349                 # Trim zero padding from char/binary field
 350                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 351
 352                 return $decoded;
 353         }
 354
 355         /**
 356          * Load file metadata from a DB result row
 357          */
 358         function loadFromRow( $row, $prefix = 'img_' ) {
 359                 $this->dataLoaded = true;
 360                 $array = $this->decodeRow( $row, $prefix );
 361
 362                 foreach ( $array as $name => $value ) {
 363                         $this->$name = $value;
 364                 }
 365
 366                 $this->fileExists = true;
 367                 $this->maybeUpgradeRow();
 368         }
 369
 370         /**
 371          * Load file metadata from cache or DB, unless already loaded
 372          */
 373         function load() {
 374                 if ( !$this->dataLoaded ) {
 375                         if ( !$this->loadFromCache() ) {
 376                                 $this->loadFromDB();
 377                                 $this->saveToCache();
 378                         }
 379                         $this->dataLoaded = true;
 380                 }
 381         }
 382
 383         /**
 384          * Upgrade a row if it needs it
 385          */
 386         function maybeUpgradeRow() {
 387                 global $wgUpdateCompatibleMetadata;
 388                 if ( wfReadOnly() ) {
 389                         return;
 390                 }
 391
 392                 if ( is_null( $this->media_type ) ||
 393                         $this->mime == 'image/svg'
 394                 ) {
 395                         $this->upgradeRow();
 396                         $this->upgraded = true;
 397                 } else {
 398                         $handler = $this->getHandler();
 399                         if ( $handler ) {
 400                                 $validity = $handler->isMetadataValid( $this, $this->metadata );
 401                                 if ( $validity === MediaHandler::METADATA_BAD
 402                                         || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata )
 403                                 ) {
 404                                         $this->upgradeRow();
 405                                         $this->upgraded = true;
 406                                 }
 407                         }
 408                 }
 409         }
 410
 411         function getUpgraded() {
 412                 return $this->upgraded;
 413         }
 414
 415         /**
 416          * Fix assorted version-related problems with the image row by reloading it from the file
 417          */
 418         function upgradeRow() {
 419                 wfProfileIn( __METHOD__ );
 420
 421                 $this->lock(); // begin
 422
 423                 $this->loadFromFile();
 424
 425                 # Don't destroy file info of missing files
 426                 if ( !$this->fileExists ) {
 427                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 428                         wfProfileOut( __METHOD__ );
 429                         return;
 430                 }
 431
 432                 $dbw = $this->repo->getMasterDB();
 433                 list( $major, $minor ) = self::splitMime( $this->mime );
 434
 435                 if ( wfReadOnly() ) {
 436                         wfProfileOut( __METHOD__ );
 437                         return;
 438                 }
 439                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 440
 441                 $dbw->update( 'image',
 442                         array(
 443                                 'img_size'       => $this->size, // sanity
 444                                 'img_width'      => $this->width,
 445                                 'img_height'     => $this->height,
 446                                 'img_bits'       => $this->bits,
 447                                 'img_media_type' => $this->media_type,
 448                                 'img_major_mime' => $major,
 449                                 'img_minor_mime' => $minor,
 450                                 'img_metadata'   => $this->metadata,
 451                                 'img_sha1'       => $this->sha1,
 452                         ),
 453                         array( 'img_name' => $this->getName() ),
 454                         __METHOD__
 455                 );
 456
 457                 $this->saveToCache();
 458
 459                 $this->unlock(); // done
 460
 461                 wfProfileOut( __METHOD__ );
 462         }
 463
 464         /**
 465          * Set properties in this object to be equal to those given in the
 466          * associative array $info. Only cacheable fields can be set.
 467          *
 468          * If 'mime' is given, it will be split into major_mime/minor_mime.
 469          * If major_mime/minor_mime are given, $this->mime will also be set.
 470          */
 471         function setProps( $info ) {
 472                 $this->dataLoaded = true;
 473                 $fields = $this->getCacheFields( '' );
 474                 $fields[] = 'fileExists';
 475
 476                 foreach ( $fields as $field ) {
 477                         if ( isset( $info[$field] ) ) {
 478                                 $this->$field = $info[$field];
 479                         }
 480                 }
 481
 482                 // Fix up mime fields
 483                 if ( isset( $info['major_mime'] ) ) {
 484                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 485                 } elseif ( isset( $info['mime'] ) ) {
 486                         $this->mime = $info['mime'];
 487                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 488                 }
 489         }
 490
 491         /** splitMime inherited */
 492         /** getName inherited */
 493         /** getTitle inherited */
 494         /** getURL inherited */
 495         /** getViewURL inherited */
 496         /** getPath inherited */
 497         /** isVisible inhereted */
 498
 499         /**
 500          * @return bool
 501          */
 502         function isMissing() {
 503                 if ( $this->missing === null ) {
 504                         list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl() );
 505                         $this->missing = !$fileExists;
 506                 }
 507                 return $this->missing;
 508         }
 509
 510         /**
 511          * Return the width of the image
 512          *
 513          * @param $page int
 514          * @return bool|int Returns false on error
 515          */
 516         public function getWidth( $page = 1 ) {
 517                 $this->load();
 518
 519                 if ( $this->isMultipage() ) {
 520                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 521                         if ( $dim ) {
 522                                 return $dim['width'];
 523                         } else {
 524                                 return false;
 525                         }
 526                 } else {
 527                         return $this->width;
 528                 }
 529         }
 530
 531         /**
 532          * Return the height of the image
 533          *
 534          * @param $page int
 535          * @return bool|int Returns false on error
 536          */
 537         public function getHeight( $page = 1 ) {
 538                 $this->load();
 539
 540                 if ( $this->isMultipage() ) {
 541                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 542                         if ( $dim ) {
 543                                 return $dim['height'];
 544                         } else {
 545                                 return false;
 546                         }
 547                 } else {
 548                         return $this->height;
 549                 }
 550         }
 551
 552         /**
 553          * Returns ID or name of user who uploaded the file
 554          *
 555          * @param $type string 'text' or 'id'
 556          * @return int|string
 557          */
 558         function getUser( $type = 'text' ) {
 559                 $this->load();
 560
 561                 if ( $type == 'text' ) {
 562                         return $this->user_text;
 563                 } elseif ( $type == 'id' ) {
 564                         return $this->user;
 565                 }
 566         }
 567
 568         /**
 569          * Get handler-specific metadata
 570          * @return string
 571          */
 572         function getMetadata() {
 573                 $this->load();
 574                 return $this->metadata;
 575         }
 576
 577         /**
 578          * @return int
 579          */
 580         function getBitDepth() {
 581                 $this->load();
 582                 return $this->bits;
 583         }
 584
 585         /**
 586          * Return the size of the image file, in bytes
 587          * @return int
 588          */
 589         public function getSize() {
 590                 $this->load();
 591                 return $this->size;
 592         }
 593
 594         /**
 595          * Returns the mime type of the file.
 596          * @return string
 597          */
 598         function getMimeType() {
 599                 $this->load();
 600                 return $this->mime;
 601         }
 602
 603         /**
 604          * Return the type of the media in the file.
 605          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 606          * @return string
 607          */
 608         function getMediaType() {
 609                 $this->load();
 610                 return $this->media_type;
 611         }
 612
 613         /** canRender inherited */
 614         /** mustRender inherited */
 615         /** allowInlineDisplay inherited */
 616         /** isSafeFile inherited */
 617         /** isTrustedFile inherited */
 618
 619         /**
 620          * Returns true if the file exists on disk.
 621          * @return boolean Whether file exist on disk.
 622          */
 623         public function exists() {
 624                 $this->load();
 625                 return $this->fileExists;
 626         }
 627
 628         /** getTransformScript inherited */
 629         /** getUnscaledThumb inherited */
 630         /** thumbName inherited */
 631         /** createThumb inherited */
 632         /** transform inherited */
 633
 634         /**
 635          * Fix thumbnail files from 1.4 or before, with extreme prejudice
 636          * @todo : do we still care about this? Perhaps a maintenance script
 637          *        can be made instead. Enabling this code results in a serious
 638          *        RTT regression for wikis without 404 handling.
 639          */
 640         function migrateThumbFile( $thumbName ) {
 641                 $thumbDir = $this->getThumbPath();
 642
 643                 /* Old code for bug 2532
 644                 $thumbPath = "$thumbDir/$thumbName";
 645                 if ( is_dir( $thumbPath ) ) {
 646                         // Directory where file should be
 647                         // This happened occasionally due to broken migration code in 1.5
 648                         // Rename to broken-*
 649                         for ( $i = 0; $i < 100 ; $i++ ) {
 650                                 $broken = $this->repo->getZonePath( 'public' ) . "/broken-$i-$thumbName";
 651                                 if ( !file_exists( $broken ) ) {
 652                                         rename( $thumbPath, $broken );
 653                                         break;
 654                                 }
 655                         }
 656                         // Doesn't exist anymore
 657                         clearstatcache();
 658                 }
 659                 */
 660
 661                 /*
 662                 if ( $this->repo->fileExists( $thumbDir ) ) {
 663                         // Delete file where directory should be
 664                         $this->repo->cleanupBatch( array( $thumbDir ) );
 665                 }
 666                 */
 667         }
 668
 669         /** getHandler inherited */
 670         /** iconThumb inherited */
 671         /** getLastError inherited */
 672
 673         /**
 674          * Get all thumbnail names previously generated for this file
 675          * @param $archiveName string|bool Name of an archive file, default false
 676          * @return array first element is the base dir, then files in that base dir.
 677          */
 678         function getThumbnails( $archiveName = false ) {
 679                 if ( $archiveName ) {
 680                         $dir = $this->getArchiveThumbPath( $archiveName );
 681                 } else {
 682                         $dir = $this->getThumbPath();
 683                 }
 684
 685                 $backend = $this->repo->getBackend();
 686                 $files = array( $dir );
 687                 $iterator = $backend->getFileList( array( 'dir' => $dir ) );
 688                 foreach ( $iterator as $file ) {
 689                         $files[] = $file;
 690                 }
 691
 692                 return $files;
 693         }
 694
 695         /**
 696          * Refresh metadata in memcached, but don't touch thumbnails or squid
 697          */
 698         function purgeMetadataCache() {
 699                 $this->loadFromDB();
 700                 $this->saveToCache();
 701                 $this->purgeHistory();
 702         }
 703
 704         /**
 705          * Purge the shared history (OldLocalFile) cache
 706          */
 707         function purgeHistory() {
 708                 global $wgMemc;
 709
 710                 $hashedName = md5( $this->getName() );
 711                 $oldKey = $this->repo->getSharedCacheKey( 'oldfile', $hashedName );
 712
 713                 // Must purge thumbnails for old versions too! bug 30192
 714                 foreach( $this->getHistory() as $oldFile ) {
 715                         $oldFile->purgeThumbnails();
 716                 }
 717
 718                 if ( $oldKey ) {
 719                         $wgMemc->delete( $oldKey );
 720                 }
 721         }
 722
 723         /**
 724          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid
 725          */
 726         function purgeCache( $options = array() ) {
 727                 // Refresh metadata cache
 728                 $this->purgeMetadataCache();
 729
 730                 // Delete thumbnails
 731                 $this->purgeThumbnails( $options );
 732
 733                 // Purge squid cache for this file
 734                 SquidUpdate::purge( array( $this->getURL() ) );
 735         }
 736
 737         /**
 738          * Delete cached transformed files for an archived version only.
 739          * @param $archiveName string name of the archived file
 740          */
 741         function purgeOldThumbnails( $archiveName ) {
 742                 global $wgUseSquid;
 743                 wfProfileIn( __METHOD__ );
 744
 745                 // Get a list of old thumbnails and URLs
 746                 $files = $this->getThumbnails( $archiveName );
 747                 $dir = array_shift( $files );
 748                 $this->purgeThumbList( $dir, $files );
 749
 750                 // Purge any custom thumbnail caches
 751                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, $archiveName ) );
 752
 753                 // Purge the squid
 754                 if ( $wgUseSquid ) {
 755                         $urls = array();
 756                         foreach( $files as $file ) {
 757                                 $urls[] = $this->getArchiveThumbUrl( $archiveName, $file );
 758                         }
 759                         SquidUpdate::purge( $urls );
 760                 }
 761
 762                 wfProfileOut( __METHOD__ );
 763         }
 764
 765         /**
 766          * Delete cached transformed files for the current version only.
 767          */
 768         function purgeThumbnails( $options = array() ) {
 769                 global $wgUseSquid;
 770                 wfProfileIn( __METHOD__ );
 771
 772                 // Delete thumbnails
 773                 $files = $this->getThumbnails();
 774
 775                 // Give media handler a chance to filter the purge list
 776                 if ( !empty( $options['forThumbRefresh'] ) ) {
 777                         $handler = $this->getHandler();
 778                         if ( $handler ) {
 779                                 $handler->filterThumbnailPurgeList( $files, $options );
 780                         }
 781                 }
 782
 783                 $dir = array_shift( $files );
 784                 $this->purgeThumbList( $dir, $files );
 785
 786                 // Purge any custom thumbnail caches
 787                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, false ) );
 788
 789                 // Purge the squid
 790                 if ( $wgUseSquid ) {
 791                         $urls = array();
 792                         foreach( $files as $file ) {
 793                                 $urls[] = $this->getThumbUrl( $file );
 794                         }
 795                         SquidUpdate::purge( $urls );
 796                 }
 797
 798                 wfProfileOut( __METHOD__ );
 799         }
 800
 801         /**
 802          * Delete a list of thumbnails visible at urls
 803          * @param $dir string base dir of the files.
 804          * @param $files array of strings: relative filenames (to $dir)
 805          */
 806         protected function purgeThumbList( $dir, $files ) {
 807                 $fileListDebug = strtr(
 808                         var_export( $files, true ),
 809                         array("\n"=>'')
 810                 );
 811                 wfDebug( __METHOD__ . ": $fileListDebug\n" );
 812
 813                 $purgeList = array();
 814                 foreach ( $files as $file ) {
 815                         # Check that the base file name is part of the thumb name
 816                         # This is a basic sanity check to avoid erasing unrelated directories
 817                         if ( strpos( $file, $this->getName() ) !== false
 818                                 || strpos( $file, "-thumbnail" ) !== false // "short" thumb name
 819                         ) {
 820                                 $purgeList[] = "{$dir}/{$file}";
 821                         }
 822                 }
 823
 824                 # Delete the thumbnails
 825                 $this->repo->quickPurgeBatch( $purgeList );
 826                 # Clear out the thumbnail directory if empty
 827                 $this->repo->quickCleanDir( $dir );
 828         }
 829
 830         /** purgeDescription inherited */
 831         /** purgeEverything inherited */
 832
 833         /**
 834          * @param $limit null
 835          * @param $start null
 836          * @param $end null
 837          * @param $inc bool
 838          * @return array
 839          */
 840         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
 841                 $dbr = $this->repo->getSlaveDB();
 842                 $tables = array( 'oldimage' );
 843                 $fields = OldLocalFile::selectFields();
 844                 $conds = $opts = $join_conds = array();
 845                 $eq = $inc ? '=' : '';
 846                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
 847
 848                 if ( $start ) {
 849                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
 850                 }
 851
 852                 if ( $end ) {
 853                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
 854                 }
 855
 856                 if ( $limit ) {
 857                         $opts['LIMIT'] = $limit;
 858                 }
 859
 860                 // Search backwards for time > x queries
 861                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
 862                 $opts['ORDER BY'] = "oi_timestamp $order";
 863                 $opts['USE INDEX'] = array( 'oldimage' => 'oi_name_timestamp' );
 864
 865                 wfRunHooks( 'LocalFile::getHistory', array( &$this, &$tables, &$fields,
 866                         &$conds, &$opts, &$join_conds ) );
 867
 868                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
 869                 $r = array();
 870
 871                 foreach ( $res as $row ) {
 872                         if ( $this->repo->oldFileFromRowFactory ) {
 873                                 $r[] = call_user_func( $this->repo->oldFileFromRowFactory, $row, $this->repo );
 874                         } else {
 875                                 $r[] = OldLocalFile::newFromRow( $row, $this->repo );
 876                         }
 877                 }
 878
 879                 if ( $order == 'ASC' ) {
 880                         $r = array_reverse( $r ); // make sure it ends up descending
 881                 }
 882
 883                 return $r;
 884         }
 885
 886         /**
 887          * Return the history of this file, line by line.
 888          * starts with current version, then old versions.
 889          * uses $this->historyLine to check which line to return:
 890          *  0      return line for current version
 891          *  1      query for old versions, return first one
 892          *  2, ... return next old version from above query
 893          * @return bool
 894          */
 895         public function nextHistoryLine() {
 896                 # Polymorphic function name to distinguish foreign and local fetches
 897                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 898
 899                 $dbr = $this->repo->getSlaveDB();
 900
 901                 if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
 902                         $this->historyRes = $dbr->select( 'image',
 903                                 array(
 904                                         '*',
 905                                         "'' AS oi_archive_name",
 906                                         '0 as oi_deleted',
 907                                         'img_sha1'
 908                                 ),
 909                                 array( 'img_name' => $this->title->getDBkey() ),
 910                                 $fname
 911                         );
 912
 913                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
 914                                 $this->historyRes = null;
 915                                 return false;
 916                         }
 917                 } elseif ( $this->historyLine == 1 ) {
 918                         $this->historyRes = $dbr->select( 'oldimage', '*',
 919                                 array( 'oi_name' => $this->title->getDBkey() ),
 920                                 $fname,
 921                                 array( 'ORDER BY' => 'oi_timestamp DESC' )
 922                         );
 923                 }
 924                 $this->historyLine ++;
 925
 926                 return $dbr->fetchObject( $this->historyRes );
 927         }
 928
 929         /**
 930          * Reset the history pointer to the first element of the history
 931          */
 932         public function resetHistory() {
 933                 $this->historyLine = 0;
 934
 935                 if ( !is_null( $this->historyRes ) ) {
 936                         $this->historyRes = null;
 937                 }
 938         }
 939
 940         /** getHashPath inherited */
 941         /** getRel inherited */
 942         /** getUrlRel inherited */
 943         /** getArchiveRel inherited */
 944         /** getArchivePath inherited */
 945         /** getThumbPath inherited */
 946         /** getArchiveUrl inherited */
 947         /** getThumbUrl inherited */
 948         /** getArchiveVirtualUrl inherited */
 949         /** getThumbVirtualUrl inherited */
 950         /** isHashed inherited */
 951
 952         /**
 953          * Upload a file and record it in the DB
 954          * @param $srcPath String: source storage path, virtual URL, or filesystem path
 955          * @param $comment String: upload description
 956          * @param $pageText String: text to use for the new description page,
 957          *                  if a new description page is created
 958          * @param $flags Integer|bool: flags for publish()
 959          * @param $props Array|bool: File properties, if known. This can be used to reduce the
 960          *               upload time when uploading virtual URLs for which the file info
 961          *               is already known
 962          * @param $timestamp String|bool: timestamp for img_timestamp, or false to use the current time
 963          * @param $user User|null: User object or null to use $wgUser
 964          *
 965          * @return FileRepoStatus object. On success, the value member contains the
 966          *     archive name, or an empty string if it was a new file.
 967          */
 968         function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false, $timestamp = false, $user = null ) {
 969                 global $wgContLang;
 970
 971                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
 972                         return $this->readOnlyFatalStatus();
 973                 }
 974
 975                 if ( !$props ) {
 976                         wfProfileIn( __METHOD__ . '-getProps' );
 977                         if ( $this->repo->isVirtualUrl( $srcPath )
 978                                 || FileBackend::isStoragePath( $srcPath ) )
 979                         {
 980                                 $props = $this->repo->getFileProps( $srcPath );
 981                         } else {
 982                                 $props = FSFile::getPropsFromPath( $srcPath );
 983                         }
 984                         wfProfileOut( __METHOD__ . '-getProps' );
 985                 }
 986
 987                 $options = array();
 988                 $handler = MediaHandler::getHandler( $props['mime'] );
 989                 if ( $handler ) {
 990                         $options['headers'] = $handler->getStreamHeaders( $props['metadata'] );
 991                 } else {
 992                         $options['headers'] = array();
 993                 }
 994
 995                 // truncate nicely or the DB will do it for us
 996                 // non-nicely (dangling multi-byte chars, non-truncated version in cache).
 997                 $comment = $wgContLang->truncate( $comment, 255 );
 998                 $this->lock(); // begin
 999                 $status = $this->publish( $srcPath, $flags, $options );
1000
1001                 if ( $status->successCount > 0 ) {
1002                         # Essentially we are displacing any existing current file and saving
1003                         # a new current file at the old location. If just the first succeeded,
1004                         # we still need to displace the current DB entry and put in a new one.
1005                         if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp, $user ) ) {
1006                                 $status->fatal( 'filenotfound', $srcPath );
1007                         }
1008                 }
1009
1010                 $this->unlock(); // done
1011
1012                 return $status;
1013         }
1014
1015         /**
1016          * Record a file upload in the upload log and the image table
1017          * @param $oldver
1018          * @param $desc string
1019          * @param $license string
1020          * @param $copyStatus string
1021          * @param $source string
1022          * @param $watch bool
1023          * @param $timestamp string|bool
1024          * @return bool
1025          */
1026         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
1027                 $watch = false, $timestamp = false )
1028         {
1029                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
1030
1031                 if ( !$this->recordUpload2( $oldver, $desc, $pageText, false, $timestamp ) ) {
1032                         return false;
1033                 }
1034
1035                 if ( $watch ) {
1036                         global $wgUser;
1037                         $wgUser->addWatch( $this->getTitle() );
1038                 }
1039                 return true;
1040         }
1041
1042         /**
1043          * Record a file upload in the upload log and the image table
1044          * @param $oldver
1045          * @param $comment string
1046          * @param $pageText string
1047          * @param $props bool|array
1048          * @param $timestamp bool|string
1049          * @param $user null|User
1050          * @return bool
1051          */
1052         function recordUpload2(
1053                 $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null
1054         ) {
1055                 wfProfileIn( __METHOD__ );
1056
1057                 if ( is_null( $user ) ) {
1058                         global $wgUser;
1059                         $user = $wgUser;
1060                 }
1061
1062                 $dbw = $this->repo->getMasterDB();
1063                 $dbw->begin( __METHOD__ );
1064
1065                 if ( !$props ) {
1066                         wfProfileIn( __METHOD__ . '-getProps' );
1067                         $props = $this->repo->getFileProps( $this->getVirtualUrl() );
1068                         wfProfileOut( __METHOD__ . '-getProps' );
1069                 }
1070
1071                 if ( $timestamp === false ) {
1072                         $timestamp = $dbw->timestamp();
1073                 }
1074
1075                 $props['description'] = $comment;
1076                 $props['user'] = $user->getId();
1077                 $props['user_text'] = $user->getName();
1078                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1079                 $this->setProps( $props );
1080
1081                 # Fail now if the file isn't there
1082                 if ( !$this->fileExists ) {
1083                         wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
1084                         wfProfileOut( __METHOD__ );
1085                         return false;
1086                 }
1087
1088                 $reupload = false;
1089
1090                 # Test to see if the row exists using INSERT IGNORE
1091                 # This avoids race conditions by locking the row until the commit, and also
1092                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
1093                 $dbw->insert( 'image',
1094                         array(
1095                                 'img_name'        => $this->getName(),
1096                                 'img_size'        => $this->size,
1097                                 'img_width'       => intval( $this->width ),
1098                                 'img_height'      => intval( $this->height ),
1099                                 'img_bits'        => $this->bits,
1100                                 'img_media_type'  => $this->media_type,
1101                                 'img_major_mime'  => $this->major_mime,
1102                                 'img_minor_mime'  => $this->minor_mime,
1103                                 'img_timestamp'   => $timestamp,
1104                                 'img_description' => $comment,
1105                                 'img_user'        => $user->getId(),
1106                                 'img_user_text'   => $user->getName(),
1107                                 'img_metadata'    => $this->metadata,
1108                                 'img_sha1'        => $this->sha1
1109                         ),
1110                         __METHOD__,
1111                         'IGNORE'
1112                 );
1113                 if ( $dbw->affectedRows() == 0 ) {
1114                         # (bug 34993) Note: $oldver can be empty here, if the previous
1115                         # version of the file was broken. Allow registration of the new
1116                         # version to continue anyway, because that's better than having
1117                         # an image that's not fixable by user operations.
1118
1119                         $reupload = true;
1120                         # Collision, this is an update of a file
1121                         # Insert previous contents into oldimage
1122                         $dbw->insertSelect( 'oldimage', 'image',
1123                                 array(
1124                                         'oi_name'         => 'img_name',
1125                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1126                                         'oi_size'         => 'img_size',
1127                                         'oi_width'        => 'img_width',
1128                                         'oi_height'       => 'img_height',
1129                                         'oi_bits'         => 'img_bits',
1130                                         'oi_timestamp'    => 'img_timestamp',
1131                                         'oi_description'  => 'img_description',
1132                                         'oi_user'         => 'img_user',
1133                                         'oi_user_text'    => 'img_user_text',
1134                                         'oi_metadata'     => 'img_metadata',
1135                                         'oi_media_type'   => 'img_media_type',
1136                                         'oi_major_mime'   => 'img_major_mime',
1137                                         'oi_minor_mime'   => 'img_minor_mime',
1138                                         'oi_sha1'         => 'img_sha1'
1139                                 ),
1140                                 array( 'img_name' => $this->getName() ),
1141                                 __METHOD__
1142                         );
1143
1144                         # Update the current image row
1145                         $dbw->update( 'image',
1146                                 array( /* SET */
1147                                         'img_size'        => $this->size,
1148                                         'img_width'       => intval( $this->width ),
1149                                         'img_height'      => intval( $this->height ),
1150                                         'img_bits'        => $this->bits,
1151                                         'img_media_type'  => $this->media_type,
1152                                         'img_major_mime'  => $this->major_mime,
1153                                         'img_minor_mime'  => $this->minor_mime,
1154                                         'img_timestamp'   => $timestamp,
1155                                         'img_description' => $comment,
1156                                         'img_user'        => $user->getId(),
1157                                         'img_user_text'   => $user->getName(),
1158                                         'img_metadata'    => $this->metadata,
1159                                         'img_sha1'        => $this->sha1
1160                                 ),
1161                                 array( 'img_name' => $this->getName() ),
1162                                 __METHOD__
1163                         );
1164                 } else {
1165                         # This is a new file, so update the image count
1166                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
1167                 }
1168
1169                 $descTitle = $this->getTitle();
1170                 $wikiPage = new WikiFilePage( $descTitle );
1171                 $wikiPage->setFile( $this );
1172
1173                 # Add the log entry
1174                 $log = new LogPage( 'upload' );
1175                 $action = $reupload ? 'overwrite' : 'upload';
1176                 $logId = $log->addEntry( $action, $descTitle, $comment, array(), $user );
1177
1178                 wfProfileIn( __METHOD__ . '-edit' );
1179                 $exists = $descTitle->exists();
1180
1181                 if ( $exists ) {
1182                         # Create a null revision
1183                         $latest = $descTitle->getLatestRevID();
1184                         $nullRevision = Revision::newNullRevision(
1185                                 $dbw,
1186                                 $descTitle->getArticleID(),
1187                                 $log->getRcComment(),
1188                                 false
1189                         );
1190                         if (!is_null($nullRevision)) {
1191                                 $nullRevision->insertOn( $dbw );
1192
1193                                 wfRunHooks( 'NewRevisionFromEditComplete', array( $wikiPage, $nullRevision, $latest, $user ) );
1194                                 $wikiPage->updateRevisionOn( $dbw, $nullRevision );
1195                         }
1196                 }
1197
1198                 # Commit the transaction now, in case something goes wrong later
1199                 # The most important thing is that files don't get lost, especially archives
1200                 # NOTE: once we have support for nested transactions, the commit may be moved
1201                 #       to after $wikiPage->doEdit has been called.
1202                 $dbw->commit( __METHOD__ );
1203
1204                 if ( $exists ) {
1205                         # Invalidate the cache for the description page
1206                         $descTitle->invalidateCache();
1207                         $descTitle->purgeSquid();
1208                 } else {
1209                         # New file; create the description page.
1210                         # There's already a log entry, so don't make a second RC entry
1211                         # Squid and file cache for the description page are purged by doEditContent.
1212                         $content = ContentHandler::makeContent( $pageText, $descTitle );
1213                         $status = $wikiPage->doEditContent( $content, $comment, EDIT_NEW | EDIT_SUPPRESS_RC, false, $user );
1214
1215                         if ( isset( $status->value['revision'] ) ) { // XXX; doEdit() uses a transaction
1216                                 $dbw->begin();
1217                                 $dbw->update( 'logging',
1218                                         array( 'log_page' => $status->value['revision']->getPage() ),
1219                                         array( 'log_id' => $logId ),
1220                                         __METHOD__
1221                                 );
1222                                 $dbw->commit(); // commit before anything bad can happen
1223                         }
1224                 }
1225                 wfProfileOut( __METHOD__ . '-edit' );
1226
1227                 # Save to cache and purge the squid
1228                 # We shall not saveToCache before the commit since otherwise
1229                 # in case of a rollback there is an usable file from memcached
1230                 # which in fact doesn't really exist (bug 24978)
1231                 $this->saveToCache();
1232
1233                 if ( $reupload ) {
1234                         # Delete old thumbnails
1235                         wfProfileIn( __METHOD__ . '-purge' );
1236                         $this->purgeThumbnails();
1237                         wfProfileOut( __METHOD__ . '-purge' );
1238
1239                         # Remove the old file from the squid cache
1240                         SquidUpdate::purge( array( $this->getURL() ) );
1241                 }
1242
1243                 # Hooks, hooks, the magic of hooks...
1244                 wfProfileIn( __METHOD__ . '-hooks' );
1245                 wfRunHooks( 'FileUpload', array( $this, $reupload, $descTitle->exists() ) );
1246                 wfProfileOut( __METHOD__ . '-hooks' );
1247
1248                 # Invalidate cache for all pages using this file
1249                 $update = new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' );
1250                 $update->doUpdate();
1251
1252                 # Invalidate cache for all pages that redirects on this page
1253                 $redirs = $this->getTitle()->getRedirectsHere();
1254
1255                 foreach ( $redirs as $redir ) {
1256                         $update = new HTMLCacheUpdate( $redir, 'imagelinks' );
1257                         $update->doUpdate();
1258                 }
1259
1260                 wfProfileOut( __METHOD__ );
1261                 return true;
1262         }
1263
1264         /**
1265          * Move or copy a file to its public location. If a file exists at the
1266          * destination, move it to an archive. Returns a FileRepoStatus object with
1267          * the archive name in the "value" member on success.
1268          *
1269          * The archive name should be passed through to recordUpload for database
1270          * registration.
1271          *
1272          * @param $srcPath String: local filesystem path to the source image
1273          * @param $flags Integer: a bitwise combination of:
1274          *     File::DELETE_SOURCE      Delete the source file, i.e. move rather than copy
1275          * @param $options Array Optional additional parameters
1276          * @return FileRepoStatus object. On success, the value member contains the
1277          *     archive name, or an empty string if it was a new file.
1278          */
1279         function publish( $srcPath, $flags = 0, array $options = array() ) {
1280                 return $this->publishTo( $srcPath, $this->getRel(), $flags, $options );
1281         }
1282
1283         /**
1284          * Move or copy a file to a specified location. Returns a FileRepoStatus
1285          * object with the archive name in the "value" member on success.
1286          *
1287          * The archive name should be passed through to recordUpload for database
1288          * registration.
1289          *
1290          * @param $srcPath String: local filesystem path to the source image
1291          * @param $dstRel String: target relative path
1292          * @param $flags Integer: a bitwise combination of:
1293          *     File::DELETE_SOURCE      Delete the source file, i.e. move rather than copy
1294          * @param $options Array Optional additional parameters
1295          * @return FileRepoStatus object. On success, the value member contains the
1296          *     archive name, or an empty string if it was a new file.
1297          */
1298         function publishTo( $srcPath, $dstRel, $flags = 0, array $options = array() ) {
1299                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1300                         return $this->readOnlyFatalStatus();
1301                 }
1302
1303                 $this->lock(); // begin
1304
1305                 $archiveName = wfTimestamp( TS_MW ) . '!'. $this->getName();
1306                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1307                 $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1308                 $status = $this->repo->publish( $srcPath, $dstRel, $archiveRel, $flags, $options );
1309
1310                 if ( $status->value == 'new' ) {
1311                         $status->value = '';
1312                 } else {
1313                         $status->value = $archiveName;
1314                 }
1315
1316                 $this->unlock(); // done
1317
1318                 return $status;
1319         }
1320
1321         /** getLinksTo inherited */
1322         /** getExifData inherited */
1323         /** isLocal inherited */
1324         /** wasDeleted inherited */
1325
1326         /**
1327          * Move file to the new title
1328          *
1329          * Move current, old version and all thumbnails
1330          * to the new filename. Old file is deleted.
1331          *
1332          * Cache purging is done; checks for validity
1333          * and logging are caller's responsibility
1334          *
1335          * @param $target Title New file name
1336          * @return FileRepoStatus object.
1337          */
1338         function move( $target ) {
1339                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1340                         return $this->readOnlyFatalStatus();
1341                 }
1342
1343                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1344                 $batch = new LocalFileMoveBatch( $this, $target );
1345
1346                 $this->lock(); // begin
1347                 $batch->addCurrent();
1348                 $archiveNames = $batch->addOlds();
1349                 $status = $batch->execute();
1350                 $this->unlock(); // done
1351
1352                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1353
1354                 $this->purgeEverything();
1355                 foreach ( $archiveNames as $archiveName ) {
1356                         $this->purgeOldThumbnails( $archiveName );
1357                 }
1358                 if ( $status->isOK() ) {
1359                         // Now switch the object
1360                         $this->title = $target;
1361                         // Force regeneration of the name and hashpath
1362                         unset( $this->name );
1363                         unset( $this->hashPath );
1364                         // Purge the new image
1365                         $this->purgeEverything();
1366                 }
1367
1368                 return $status;
1369         }
1370
1371         /**
1372          * Delete all versions of the file.
1373          *
1374          * Moves the files into an archive directory (or deletes them)
1375          * and removes the database rows.
1376          *
1377          * Cache purging is done; logging is caller's responsibility.
1378          *
1379          * @param $reason
1380          * @param $suppress
1381          * @return FileRepoStatus object.
1382          */
1383         function delete( $reason, $suppress = false ) {
1384                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1385                         return $this->readOnlyFatalStatus();
1386                 }
1387
1388                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1389
1390                 $this->lock(); // begin
1391                 $batch->addCurrent();
1392                 # Get old version relative paths
1393                 $archiveNames = $batch->addOlds();
1394                 $status = $batch->execute();
1395                 $this->unlock(); // done
1396
1397                 if ( $status->isOK() ) {
1398                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => -1 ) ) );
1399                 }
1400
1401                 $this->purgeEverything();
1402                 foreach ( $archiveNames as $archiveName ) {
1403                         $this->purgeOldThumbnails( $archiveName );
1404                 }
1405
1406                 return $status;
1407         }
1408
1409         /**
1410          * Delete an old version of the file.
1411          *
1412          * Moves the file into an archive directory (or deletes it)
1413          * and removes the database row.
1414          *
1415          * Cache purging is done; logging is caller's responsibility.
1416          *
1417          * @param $archiveName String
1418          * @param $reason String
1419          * @param $suppress Boolean
1420          * @throws MWException or FSException on database or file store failure
1421          * @return FileRepoStatus object.
1422          */
1423         function deleteOld( $archiveName, $reason, $suppress = false ) {
1424                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1425                         return $this->readOnlyFatalStatus();
1426                 }
1427
1428                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1429
1430                 $this->lock(); // begin
1431                 $batch->addOld( $archiveName );
1432                 $status = $batch->execute();
1433                 $this->unlock(); // done
1434
1435                 $this->purgeOldThumbnails( $archiveName );
1436                 if ( $status->isOK() ) {
1437                         $this->purgeDescription();
1438                         $this->purgeHistory();
1439                 }
1440
1441                 return $status;
1442         }
1443
1444         /**
1445          * Restore all or specified deleted revisions to the given file.
1446          * Permissions and logging are left to the caller.
1447          *
1448          * May throw database exceptions on error.
1449          *
1450          * @param $versions array set of record ids of deleted items to restore,
1451          *                    or empty to restore all revisions.
1452          * @param $unsuppress Boolean
1453          * @return FileRepoStatus
1454          */
1455         function restore( $versions = array(), $unsuppress = false ) {
1456                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1457                         return $this->readOnlyFatalStatus();
1458                 }
1459
1460                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1461
1462                 $this->lock(); // begin
1463                 if ( !$versions ) {
1464                         $batch->addAll();
1465                 } else {
1466                         $batch->addIds( $versions );
1467                 }
1468                 $status = $batch->execute();
1469                 if ( $status->isGood() ) {
1470                         $cleanupStatus = $batch->cleanup();
1471                         $cleanupStatus->successCount = 0;
1472                         $cleanupStatus->failCount = 0;
1473                         $status->merge( $cleanupStatus );
1474                 }
1475                 $this->unlock(); // done
1476
1477                 return $status;
1478         }
1479
1480         /** isMultipage inherited */
1481         /** pageCount inherited */
1482         /** scaleHeight inherited */
1483         /** getImageSize inherited */
1484
1485         /**
1486          * Get the URL of the file description page.
1487          * @return String
1488          */
1489         function getDescriptionUrl() {
1490                 return $this->title->getLocalUrl();
1491         }
1492
1493         /**
1494          * Get the HTML text of the description page
1495          * This is not used by ImagePage for local files, since (among other things)
1496          * it skips the parser cache.
1497          * @return bool|mixed
1498          */
1499         function getDescriptionText() {
1500                 global $wgParser;
1501                 $revision = Revision::newFromTitle( $this->title, false, Revision::READ_NORMAL );
1502                 if ( !$revision ) return false;
1503                 $content = $revision->getContent();
1504                 if ( !$content ) return false;
1505                 $pout = $content->getParserOutput( $this->title, null, new ParserOptions() );
1506                 return $pout->getText();
1507         }
1508
1509         /**
1510          * @return string
1511          */
1512         function getDescription( $audience = self::FOR_PUBLIC, User $user = null ) {
1513                 $this->load();
1514                 if ( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
1515                         return '';
1516                 } elseif ( $audience == self::FOR_THIS_USER
1517                         && !$this->userCan( self::DELETED_COMMENT, $user ) )
1518                 {
1519                         return '';
1520                 } else {
1521                         return $this->description;
1522                 }
1523         }
1524
1525         /**
1526          * @return bool|string
1527          */
1528         function getTimestamp() {
1529                 $this->load();
1530                 return $this->timestamp;
1531         }
1532
1533         /**
1534          * @return string
1535          */
1536         function getSha1() {
1537                 $this->load();
1538                 // Initialise now if necessary
1539                 if ( $this->sha1 == '' && $this->fileExists ) {
1540                         $this->lock(); // begin
1541
1542                         $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
1543                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1544                                 $dbw = $this->repo->getMasterDB();
1545                                 $dbw->update( 'image',
1546                                         array( 'img_sha1' => $this->sha1 ),
1547                                         array( 'img_name' => $this->getName() ),
1548                                         __METHOD__ );
1549                                 $this->saveToCache();
1550                         }
1551
1552                         $this->unlock(); // done
1553                 }
1554
1555                 return $this->sha1;
1556         }
1557
1558         /**
1559          * @return bool
1560          */
1561         function isCacheable() {
1562                 $this->load();
1563                 return strlen( $this->metadata ) <= self::CACHE_FIELD_MAX_LEN; // avoid OOMs
1564         }
1565
1566         /**
1567          * Start a transaction and lock the image for update
1568          * Increments a reference counter if the lock is already held
1569          * @return boolean True if the image exists, false otherwise
1570          */
1571         function lock() {
1572                 $dbw = $this->repo->getMasterDB();
1573
1574                 if ( !$this->locked ) {
1575                         $dbw->begin( __METHOD__ );
1576                         $this->locked++;
1577                 }
1578
1579                 return $dbw->selectField( 'image', '1',
1580                         array( 'img_name' => $this->getName() ), __METHOD__, array( 'FOR UPDATE' ) );
1581         }
1582
1583         /**
1584          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1585          * the transaction and thereby releases the image lock.
1586          */
1587         function unlock() {
1588                 if ( $this->locked ) {
1589                         --$this->locked;
1590                         if ( !$this->locked ) {
1591                                 $dbw = $this->repo->getMasterDB();
1592                                 $dbw->commit( __METHOD__ );
1593                         }
1594                 }
1595         }
1596
1597         /**
1598          * Roll back the DB transaction and mark the image unlocked
1599          */
1600         function unlockAndRollback() {
1601                 $this->locked = false;
1602                 $dbw = $this->repo->getMasterDB();
1603                 $dbw->rollback( __METHOD__ );
1604         }
1605
1606         /**
1607          * @return Status
1608          */
1609         protected function readOnlyFatalStatus() {
1610                 return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
1611                         $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
1612         }
1613 } // LocalFile class
1614
1615 # ------------------------------------------------------------------------------
1616
1617 /**
1618  * Helper class for file deletion
1619  * @ingroup FileAbstraction
1620  */
1621 class LocalFileDeleteBatch {
1622
1623         /**
1624          * @var LocalFile
1625          */
1626         var $file;
1627
1628         var $reason, $srcRels = array(), $archiveUrls = array(), $deletionBatch, $suppress;
1629         var $status;
1630
1631         /**
1632          * @param $file File
1633          * @param $reason string
1634          * @param $suppress bool
1635          */
1636         function __construct( File $file, $reason = '', $suppress = false ) {
1637                 $this->file = $file;
1638                 $this->reason = $reason;
1639                 $this->suppress = $suppress;
1640                 $this->status = $file->repo->newGood();
1641         }
1642
1643         function addCurrent() {
1644                 $this->srcRels['.'] = $this->file->getRel();
1645         }
1646
1647         /**
1648          * @param $oldName string
1649          */
1650         function addOld( $oldName ) {
1651                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
1652                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
1653         }
1654
1655         /**
1656          * Add the old versions of the image to the batch
1657          * @return Array List of archive names from old versions
1658          */
1659         function addOlds() {
1660                 $archiveNames = array();
1661
1662                 $dbw = $this->file->repo->getMasterDB();
1663                 $result = $dbw->select( 'oldimage',
1664                         array( 'oi_archive_name' ),
1665                         array( 'oi_name' => $this->file->getName() ),
1666                         __METHOD__
1667                 );
1668
1669                 foreach ( $result as $row ) {
1670                         $this->addOld( $row->oi_archive_name );
1671                         $archiveNames[] = $row->oi_archive_name;
1672                 }
1673
1674                 return $archiveNames;
1675         }
1676
1677         /**
1678          * @return array
1679          */
1680         function getOldRels() {
1681                 if ( !isset( $this->srcRels['.'] ) ) {
1682                         $oldRels =& $this->srcRels;
1683                         $deleteCurrent = false;
1684                 } else {
1685                         $oldRels = $this->srcRels;
1686                         unset( $oldRels['.'] );
1687                         $deleteCurrent = true;
1688                 }
1689
1690                 return array( $oldRels, $deleteCurrent );
1691         }
1692
1693         /**
1694          * @return array
1695          */
1696         protected function getHashes() {
1697                 $hashes = array();
1698                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1699
1700                 if ( $deleteCurrent ) {
1701                         $hashes['.'] = $this->file->getSha1();
1702                 }
1703
1704                 if ( count( $oldRels ) ) {
1705                         $dbw = $this->file->repo->getMasterDB();
1706                         $res = $dbw->select(
1707                                 'oldimage',
1708                                 array( 'oi_archive_name', 'oi_sha1' ),
1709                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1710                                 __METHOD__
1711                         );
1712
1713                         foreach ( $res as $row ) {
1714                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
1715                                         // Get the hash from the file
1716                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
1717                                         $props = $this->file->repo->getFileProps( $oldUrl );
1718
1719                                         if ( $props['fileExists'] ) {
1720                                                 // Upgrade the oldimage row
1721                                                 $dbw->update( 'oldimage',
1722                                                         array( 'oi_sha1' => $props['sha1'] ),
1723                                                         array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ),
1724                                                         __METHOD__ );
1725                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
1726                                         } else {
1727                                                 $hashes[$row->oi_archive_name] = false;
1728                                         }
1729                                 } else {
1730                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
1731                                 }
1732                         }
1733                 }
1734
1735                 $missing = array_diff_key( $this->srcRels, $hashes );
1736
1737                 foreach ( $missing as $name => $rel ) {
1738                         $this->status->error( 'filedelete-old-unregistered', $name );
1739                 }
1740
1741                 foreach ( $hashes as $name => $hash ) {
1742                         if ( !$hash ) {
1743                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
1744                                 unset( $hashes[$name] );
1745                         }
1746                 }
1747
1748                 return $hashes;
1749         }
1750
1751         function doDBInserts() {
1752                 global $wgUser;
1753
1754                 $dbw = $this->file->repo->getMasterDB();
1755                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
1756                 $encUserId = $dbw->addQuotes( $wgUser->getId() );
1757                 $encReason = $dbw->addQuotes( $this->reason );
1758                 $encGroup = $dbw->addQuotes( 'deleted' );
1759                 $ext = $this->file->getExtension();
1760                 $dotExt = $ext === '' ? '' : ".$ext";
1761                 $encExt = $dbw->addQuotes( $dotExt );
1762                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1763
1764                 // Bitfields to further suppress the content
1765                 if ( $this->suppress ) {
1766                         $bitfield = 0;
1767                         // This should be 15...
1768                         $bitfield |= Revision::DELETED_TEXT;
1769                         $bitfield |= Revision::DELETED_COMMENT;
1770                         $bitfield |= Revision::DELETED_USER;
1771                         $bitfield |= Revision::DELETED_RESTRICTED;
1772                 } else {
1773                         $bitfield = 'oi_deleted';
1774                 }
1775
1776                 if ( $deleteCurrent ) {
1777                         $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) );
1778                         $where = array( 'img_name' => $this->file->getName() );
1779                         $dbw->insertSelect( 'filearchive', 'image',
1780                                 array(
1781                                         'fa_storage_group' => $encGroup,
1782                                         'fa_storage_key'   => "CASE WHEN img_sha1='' THEN '' ELSE $concat END",
1783                                         'fa_deleted_user'      => $encUserId,
1784                                         'fa_deleted_timestamp' => $encTimestamp,
1785                                         'fa_deleted_reason'    => $encReason,
1786                                         'fa_deleted'           => $this->suppress ? $bitfield : 0,
1787
1788                                         'fa_name'         => 'img_name',
1789                                         'fa_archive_name' => 'NULL',
1790                                         'fa_size'         => 'img_size',
1791                                         'fa_width'        => 'img_width',
1792                                         'fa_height'       => 'img_height',
1793                                         'fa_metadata'     => 'img_metadata',
1794                                         'fa_bits'         => 'img_bits',
1795                                         'fa_media_type'   => 'img_media_type',
1796                                         'fa_major_mime'   => 'img_major_mime',
1797                                         'fa_minor_mime'   => 'img_minor_mime',
1798                                         'fa_description'  => 'img_description',
1799                                         'fa_user'         => 'img_user',
1800                                         'fa_user_text'    => 'img_user_text',
1801                                         'fa_timestamp'    => 'img_timestamp',
1802                                         'fa_sha1'         => 'img_sha1',
1803                                 ), $where, __METHOD__ );
1804                 }
1805
1806                 if ( count( $oldRels ) ) {
1807                         $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) );
1808                         $where = array(
1809                                 'oi_name' => $this->file->getName(),
1810                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')' );
1811                         $dbw->insertSelect( 'filearchive', 'oldimage',
1812                                 array(
1813                                         'fa_storage_group' => $encGroup,
1814                                         'fa_storage_key'   => "CASE WHEN oi_sha1='' THEN '' ELSE $concat END",
1815                                         'fa_deleted_user'      => $encUserId,
1816                                         'fa_deleted_timestamp' => $encTimestamp,
1817                                         'fa_deleted_reason'    => $encReason,
1818                                         'fa_deleted'           => $this->suppress ? $bitfield : 'oi_deleted',
1819
1820                                         'fa_name'         => 'oi_name',
1821                                         'fa_archive_name' => 'oi_archive_name',
1822                                         'fa_size'         => 'oi_size',
1823                                         'fa_width'        => 'oi_width',
1824                                         'fa_height'       => 'oi_height',
1825                                         'fa_metadata'     => 'oi_metadata',
1826                                         'fa_bits'         => 'oi_bits',
1827                                         'fa_media_type'   => 'oi_media_type',
1828                                         'fa_major_mime'   => 'oi_major_mime',
1829                                         'fa_minor_mime'   => 'oi_minor_mime',
1830                                         'fa_description'  => 'oi_description',
1831                                         'fa_user'         => 'oi_user',
1832                                         'fa_user_text'    => 'oi_user_text',
1833                                         'fa_timestamp'    => 'oi_timestamp',
1834                                         'fa_sha1'         => 'oi_sha1',
1835                                 ), $where, __METHOD__ );
1836                 }
1837         }
1838
1839         function doDBDeletes() {
1840                 $dbw = $this->file->repo->getMasterDB();
1841                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1842
1843                 if ( count( $oldRels ) ) {
1844                         $dbw->delete( 'oldimage',
1845                                 array(
1846                                         'oi_name' => $this->file->getName(),
1847                                         'oi_archive_name' => array_keys( $oldRels )
1848                                 ), __METHOD__ );
1849                 }
1850
1851                 if ( $deleteCurrent ) {
1852                         $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ );
1853                 }
1854         }
1855
1856         /**
1857          * Run the transaction
1858          * @return FileRepoStatus
1859          */
1860         function execute() {
1861                 wfProfileIn( __METHOD__ );
1862
1863                 $this->file->lock();
1864                 // Leave private files alone
1865                 $privateFiles = array();
1866                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1867                 $dbw = $this->file->repo->getMasterDB();
1868
1869                 if ( !empty( $oldRels ) ) {
1870                         $res = $dbw->select( 'oldimage',
1871                                 array( 'oi_archive_name' ),
1872                                 array( 'oi_name' => $this->file->getName(),
1873                                         'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1874                                         $dbw->bitAnd( 'oi_deleted', File::DELETED_FILE ) => File::DELETED_FILE ),
1875                                 __METHOD__ );
1876
1877                         foreach ( $res as $row ) {
1878                                 $privateFiles[$row->oi_archive_name] = 1;
1879                         }
1880                 }
1881                 // Prepare deletion batch
1882                 $hashes = $this->getHashes();
1883                 $this->deletionBatch = array();
1884                 $ext = $this->file->getExtension();
1885                 $dotExt = $ext === '' ? '' : ".$ext";
1886
1887                 foreach ( $this->srcRels as $name => $srcRel ) {
1888                         // Skip files that have no hash (missing source).
1889                         // Keep private files where they are.
1890                         if ( isset( $hashes[$name] ) && !array_key_exists( $name, $privateFiles ) ) {
1891                                 $hash = $hashes[$name];
1892                                 $key = $hash . $dotExt;
1893                                 $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1894                                 $this->deletionBatch[$name] = array( $srcRel, $dstRel );
1895                         }
1896                 }
1897
1898                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
1899                 // We acquire this lock by running the inserts now, before the file operations.
1900                 //
1901                 // This potentially has poor lock contention characteristics -- an alternative
1902                 // scheme would be to insert stub filearchive entries with no fa_name and commit
1903                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
1904                 $this->doDBInserts();
1905
1906                 // Removes non-existent file from the batch, so we don't get errors.
1907                 $this->deletionBatch = $this->removeNonexistentFiles( $this->deletionBatch );
1908
1909                 // Execute the file deletion batch
1910                 $status = $this->file->repo->deleteBatch( $this->deletionBatch );
1911
1912                 if ( !$status->isGood() ) {
1913                         $this->status->merge( $status );
1914                 }
1915
1916                 if ( !$this->status->isOK() ) {
1917                         // Critical file deletion error
1918                         // Roll back inserts, release lock and abort
1919                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
1920                         $this->file->unlockAndRollback();
1921                         wfProfileOut( __METHOD__ );
1922                         return $this->status;
1923                 }
1924
1925                 // Delete image/oldimage rows
1926                 $this->doDBDeletes();
1927
1928                 // Commit and return
1929                 $this->file->unlock();
1930                 wfProfileOut( __METHOD__ );
1931
1932                 return $this->status;
1933         }
1934
1935         /**
1936          * Removes non-existent files from a deletion batch.
1937          * @param $batch array
1938          * @return array
1939          */
1940         function removeNonexistentFiles( $batch ) {
1941                 $files = $newBatch = array();
1942
1943                 foreach ( $batch as $batchItem ) {
1944                         list( $src, $dest ) = $batchItem;
1945                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
1946                 }
1947
1948                 $result = $this->file->repo->fileExistsBatch( $files );
1949
1950                 foreach ( $batch as $batchItem ) {
1951                         if ( $result[$batchItem[0]] ) {
1952                                 $newBatch[] = $batchItem;
1953                         }
1954                 }
1955
1956                 return $newBatch;
1957         }
1958 }
1959
1960 # ------------------------------------------------------------------------------
1961
1962 /**
1963  * Helper class for file undeletion
1964  * @ingroup FileAbstraction
1965  */
1966 class LocalFileRestoreBatch {
1967         /**
1968          * @var LocalFile
1969          */
1970         var $file;
1971
1972         var $cleanupBatch, $ids, $all, $unsuppress = false;
1973
1974         /**
1975          * @param $file File
1976          * @param $unsuppress bool
1977          */
1978         function __construct( File $file, $unsuppress = false ) {
1979                 $this->file = $file;
1980                 $this->cleanupBatch = $this->ids = array();
1981                 $this->ids = array();
1982                 $this->unsuppress = $unsuppress;
1983         }
1984
1985         /**
1986          * Add a file by ID
1987          */
1988         function addId( $fa_id ) {
1989                 $this->ids[] = $fa_id;
1990         }
1991
1992         /**
1993          * Add a whole lot of files by ID
1994          */
1995         function addIds( $ids ) {
1996                 $this->ids = array_merge( $this->ids, $ids );
1997         }
1998
1999         /**
2000          * Add all revisions of the file
2001          */
2002         function addAll() {
2003                 $this->all = true;
2004         }
2005
2006         /**
2007          * Run the transaction, except the cleanup batch.
2008          * The cleanup batch should be run in a separate transaction, because it locks different
2009          * rows and there's no need to keep the image row locked while it's acquiring those locks
2010          * The caller may have its own transaction open.
2011          * So we save the batch and let the caller call cleanup()
2012          * @return FileRepoStatus
2013          */
2014         function execute() {
2015                 global $wgLang;
2016
2017                 if ( !$this->all && !$this->ids ) {
2018                         // Do nothing
2019                         return $this->file->repo->newGood();
2020                 }
2021
2022                 $exists = $this->file->lock();
2023                 $dbw = $this->file->repo->getMasterDB();
2024                 $status = $this->file->repo->newGood();
2025
2026                 // Fetch all or selected archived revisions for the file,
2027                 // sorted from the most recent to the oldest.
2028                 $conditions = array( 'fa_name' => $this->file->getName() );
2029
2030                 if ( !$this->all ) {
2031                         $conditions[] = 'fa_id IN (' . $dbw->makeList( $this->ids ) . ')';
2032                 }
2033
2034                 $result = $dbw->select( 'filearchive', '*',
2035                         $conditions,
2036                         __METHOD__,
2037                         array( 'ORDER BY' => 'fa_timestamp DESC' )
2038                 );
2039
2040                 $idsPresent = array();
2041                 $storeBatch = array();
2042                 $insertBatch = array();
2043                 $insertCurrent = false;
2044                 $deleteIds = array();
2045                 $first = true;
2046                 $archiveNames = array();
2047
2048                 foreach ( $result as $row ) {
2049                         $idsPresent[] = $row->fa_id;
2050
2051                         if ( $row->fa_name != $this->file->getName() ) {
2052                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
2053                                 $status->failCount++;
2054                                 continue;
2055                         }
2056
2057                         if ( $row->fa_storage_key == '' ) {
2058                                 // Revision was missing pre-deletion
2059                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
2060                                 $status->failCount++;
2061                                 continue;
2062                         }
2063
2064                         $deletedRel = $this->file->repo->getDeletedHashPath( $row->fa_storage_key ) . $row->fa_storage_key;
2065                         $deletedUrl = $this->file->repo->getVirtualUrl() . '/deleted/' . $deletedRel;
2066
2067                         if( isset( $row->fa_sha1 ) ) {
2068                                 $sha1 = $row->fa_sha1;
2069                         } else {
2070                                 // old row, populate from key
2071                                 $sha1 = LocalRepo::getHashFromKey( $row->fa_storage_key );
2072                         }
2073
2074                         # Fix leading zero
2075                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
2076                                 $sha1 = substr( $sha1, 1 );
2077                         }
2078
2079                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
2080                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
2081                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
2082                                 || is_null( $row->fa_metadata ) ) {
2083                                 // Refresh our metadata
2084                                 // Required for a new current revision; nice for older ones too. :)
2085                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
2086                         } else {
2087                                 $props = array(
2088                                         'minor_mime' => $row->fa_minor_mime,
2089                                         'major_mime' => $row->fa_major_mime,
2090                                         'media_type' => $row->fa_media_type,
2091                                         'metadata'   => $row->fa_metadata
2092                                 );
2093                         }
2094
2095                         if ( $first && !$exists ) {
2096                                 // This revision will be published as the new current version
2097                                 $destRel = $this->file->getRel();
2098                                 $insertCurrent = array(
2099                                         'img_name'        => $row->fa_name,
2100                                         'img_size'        => $row->fa_size,
2101                                         'img_width'       => $row->fa_width,
2102                                         'img_height'      => $row->fa_height,
2103                                         'img_metadata'    => $props['metadata'],
2104                                         'img_bits'        => $row->fa_bits,
2105                                         'img_media_type'  => $props['media_type'],
2106                                         'img_major_mime'  => $props['major_mime'],
2107                                         'img_minor_mime'  => $props['minor_mime'],
2108                                         'img_description' => $row->fa_description,
2109                                         'img_user'        => $row->fa_user,
2110                                         'img_user_text'   => $row->fa_user_text,
2111                                         'img_timestamp'   => $row->fa_timestamp,
2112                                         'img_sha1'        => $sha1
2113                                 );
2114
2115                                 // The live (current) version cannot be hidden!
2116                                 if ( !$this->unsuppress && $row->fa_deleted ) {
2117                                         $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2118                                         $this->cleanupBatch[] = $row->fa_storage_key;
2119                                 }
2120                         } else {
2121                                 $archiveName = $row->fa_archive_name;
2122
2123                                 if ( $archiveName == '' ) {
2124                                         // This was originally a current version; we
2125                                         // have to devise a new archive name for it.
2126                                         // Format is <timestamp of archiving>!<name>
2127                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
2128
2129                                         do {
2130                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
2131                                                 $timestamp++;
2132                                         } while ( isset( $archiveNames[$archiveName] ) );
2133                                 }
2134
2135                                 $archiveNames[$archiveName] = true;
2136                                 $destRel = $this->file->getArchiveRel( $archiveName );
2137                                 $insertBatch[] = array(
2138                                         'oi_name'         => $row->fa_name,
2139                                         'oi_archive_name' => $archiveName,
2140                                         'oi_size'         => $row->fa_size,
2141                                         'oi_width'        => $row->fa_width,
2142                                         'oi_height'       => $row->fa_height,
2143                                         'oi_bits'         => $row->fa_bits,
2144                                         'oi_description'  => $row->fa_description,
2145                                         'oi_user'         => $row->fa_user,
2146                                         'oi_user_text'    => $row->fa_user_text,
2147                                         'oi_timestamp'    => $row->fa_timestamp,
2148                                         'oi_metadata'     => $props['metadata'],
2149                                         'oi_media_type'   => $props['media_type'],
2150                                         'oi_major_mime'   => $props['major_mime'],
2151                                         'oi_minor_mime'   => $props['minor_mime'],
2152                                         'oi_deleted'      => $this->unsuppress ? 0 : $row->fa_deleted,
2153                                         'oi_sha1'         => $sha1 );
2154                         }
2155
2156                         $deleteIds[] = $row->fa_id;
2157
2158                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
2159                                 // private files can stay where they are
2160                                 $status->successCount++;
2161                         } else {
2162                                 $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2163                                 $this->cleanupBatch[] = $row->fa_storage_key;
2164                         }
2165
2166                         $first = false;
2167                 }
2168
2169                 unset( $result );
2170
2171                 // Add a warning to the status object for missing IDs
2172                 $missingIds = array_diff( $this->ids, $idsPresent );
2173
2174                 foreach ( $missingIds as $id ) {
2175                         $status->error( 'undelete-missing-filearchive', $id );
2176                 }
2177
2178                 // Remove missing files from batch, so we don't get errors when undeleting them
2179                 $storeBatch = $this->removeNonexistentFiles( $storeBatch );
2180
2181                 // Run the store batch
2182                 // Use the OVERWRITE_SAME flag to smooth over a common error
2183                 $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
2184                 $status->merge( $storeStatus );
2185
2186                 if ( !$status->isGood() ) {
2187                         // Even if some files could be copied, fail entirely as that is the
2188                         // easiest thing to do without data loss
2189                         $this->cleanupFailedBatch( $storeStatus, $storeBatch );
2190                         $status->ok = false;
2191                         $this->file->unlock();
2192
2193                         return $status;
2194                 }
2195
2196                 // Run the DB updates
2197                 // Because we have locked the image row, key conflicts should be rare.
2198                 // If they do occur, we can roll back the transaction at this time with
2199                 // no data loss, but leaving unregistered files scattered throughout the
2200                 // public zone.
2201                 // This is not ideal, which is why it's important to lock the image row.
2202                 if ( $insertCurrent ) {
2203                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
2204                 }
2205
2206                 if ( $insertBatch ) {
2207                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
2208                 }
2209
2210                 if ( $deleteIds ) {
2211                         $dbw->delete( 'filearchive',
2212                                 array( 'fa_id IN (' . $dbw->makeList( $deleteIds ) . ')' ),
2213                                 __METHOD__ );
2214                 }
2215
2216                 // If store batch is empty (all files are missing), deletion is to be considered successful
2217                 if ( $status->successCount > 0 || !$storeBatch ) {
2218                         if ( !$exists ) {
2219                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
2220
2221                                 DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
2222
2223                                 $this->file->purgeEverything();
2224                         } else {
2225                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
2226                                 $this->file->purgeDescription();
2227                                 $this->file->purgeHistory();
2228                         }
2229                 }
2230
2231                 $this->file->unlock();
2232
2233                 return $status;
2234         }
2235
2236         /**
2237          * Removes non-existent files from a store batch.
2238          * @param $triplets array
2239          * @return array
2240          */
2241         function removeNonexistentFiles( $triplets ) {
2242                 $files = $filteredTriplets = array();
2243                 foreach ( $triplets as $file ) {
2244                         $files[$file[0]] = $file[0];
2245                 }
2246
2247                 $result = $this->file->repo->fileExistsBatch( $files );
2248
2249                 foreach ( $triplets as $file ) {
2250                         if ( $result[$file[0]] ) {
2251                                 $filteredTriplets[] = $file;
2252                         }
2253                 }
2254
2255                 return $filteredTriplets;
2256         }
2257
2258         /**
2259          * Removes non-existent files from a cleanup batch.
2260          * @param $batch array
2261          * @return array
2262          */
2263         function removeNonexistentFromCleanup( $batch ) {
2264                 $files = $newBatch = array();
2265                 $repo = $this->file->repo;
2266
2267                 foreach ( $batch as $file ) {
2268                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
2269                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
2270                 }
2271
2272                 $result = $repo->fileExistsBatch( $files );
2273
2274                 foreach ( $batch as $file ) {
2275                         if ( $result[$file] ) {
2276                                 $newBatch[] = $file;
2277                         }
2278                 }
2279
2280                 return $newBatch;
2281         }
2282
2283         /**
2284          * Delete unused files in the deleted zone.
2285          * This should be called from outside the transaction in which execute() was called.
2286          * @return FileRepoStatus|void
2287          */
2288         function cleanup() {
2289                 if ( !$this->cleanupBatch ) {
2290                         return $this->file->repo->newGood();
2291                 }
2292
2293                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
2294
2295                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
2296
2297                 return $status;
2298         }
2299
2300         /**
2301          * Cleanup a failed batch. The batch was only partially successful, so
2302          * rollback by removing all items that were succesfully copied.
2303          *
2304          * @param Status $storeStatus
2305          * @param array $storeBatch
2306          */
2307         function cleanupFailedBatch( $storeStatus, $storeBatch ) {
2308                 $cleanupBatch = array();
2309
2310                 foreach ( $storeStatus->success as $i => $success ) {
2311                         // Check if this item of the batch was successfully copied
2312                         if ( $success ) {
2313                                 // Item was successfully copied and needs to be removed again
2314                                 // Extract ($dstZone, $dstRel) from the batch
2315                                 $cleanupBatch[] = array( $storeBatch[$i][1], $storeBatch[$i][2] );
2316                         }
2317                 }
2318                 $this->file->repo->cleanupBatch( $cleanupBatch );
2319         }
2320 }
2321
2322 # ------------------------------------------------------------------------------
2323
2324 /**
2325  * Helper class for file movement
2326  * @ingroup FileAbstraction
2327  */
2328 class LocalFileMoveBatch {
2329
2330         /**
2331          * @var LocalFile
2332          */
2333         var $file;
2334
2335         /**
2336          * @var Title
2337          */
2338         var $target;
2339
2340         var $cur, $olds, $oldCount, $archive;
2341
2342         /**
2343          * @var DatabaseBase
2344          */
2345         var $db;
2346
2347         /**
2348          * @param File $file
2349          * @param Title $target
2350          */
2351         function __construct( File $file, Title $target ) {
2352                 $this->file = $file;
2353                 $this->target = $target;
2354                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
2355                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
2356                 $this->oldName = $this->file->getName();
2357                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2358                 $this->oldRel = $this->oldHash . $this->oldName;
2359                 $this->newRel = $this->newHash . $this->newName;
2360                 $this->db = $file->getRepo()->getMasterDb();
2361         }
2362
2363         /**
2364          * Add the current image to the batch
2365          */
2366         function addCurrent() {
2367                 $this->cur = array( $this->oldRel, $this->newRel );
2368         }
2369
2370         /**
2371          * Add the old versions of the image to the batch
2372          * @return Array List of archive names from old versions
2373          */
2374         function addOlds() {
2375                 $archiveBase = 'archive';
2376                 $this->olds = array();
2377                 $this->oldCount = 0;
2378                 $archiveNames = array();
2379
2380                 $result = $this->db->select( 'oldimage',
2381                         array( 'oi_archive_name', 'oi_deleted' ),
2382                         array( 'oi_name' => $this->oldName ),
2383                         __METHOD__
2384                 );
2385
2386                 foreach ( $result as $row ) {
2387                         $archiveNames[] = $row->oi_archive_name;
2388                         $oldName = $row->oi_archive_name;
2389                         $bits = explode( '!', $oldName, 2 );
2390
2391                         if ( count( $bits ) != 2 ) {
2392                                 wfDebug( "Old file name missing !: '$oldName' \n" );
2393                                 continue;
2394                         }
2395
2396                         list( $timestamp, $filename ) = $bits;
2397
2398                         if ( $this->oldName != $filename ) {
2399                                 wfDebug( "Old file name doesn't match: '$oldName' \n" );
2400                                 continue;
2401                         }
2402
2403                         $this->oldCount++;
2404
2405                         // Do we want to add those to oldCount?
2406                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2407                                 continue;
2408                         }
2409
2410                         $this->olds[] = array(
2411                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2412                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2413                         );
2414                 }
2415
2416                 return $archiveNames;
2417         }
2418
2419         /**
2420          * Perform the move.
2421          * @return FileRepoStatus
2422          */
2423         function execute() {
2424                 $repo = $this->file->repo;
2425                 $status = $repo->newGood();
2426
2427                 $triplets = $this->getMoveTriplets();
2428                 $triplets = $this->removeNonexistentFiles( $triplets );
2429
2430                 $this->file->lock(); // begin
2431                 // Rename the file versions metadata in the DB.
2432                 // This implicitly locks the destination file, which avoids race conditions.
2433                 // If we moved the files from A -> C before DB updates, another process could
2434                 // move files from B -> C at this point, causing storeBatch() to fail and thus
2435                 // cleanupTarget() to trigger. It would delete the C files and cause data loss.
2436                 $statusDb = $this->doDBUpdates();
2437                 if ( !$statusDb->isGood() ) {
2438                         $this->file->unlockAndRollback();
2439                         $statusDb->ok = false;
2440                         return $statusDb;
2441                 }
2442                 wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: {$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2443
2444                 // Copy the files into their new location.
2445                 // If a prior process fataled copying or cleaning up files we tolerate any
2446                 // of the existing files if they are identical to the ones being stored.
2447                 $statusMove = $repo->storeBatch( $triplets, FileRepo::OVERWRITE_SAME );
2448                 wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: {$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2449                 if ( !$statusMove->isGood() ) {
2450                         // Delete any files copied over (while the destination is still locked)
2451                         $this->cleanupTarget( $triplets );
2452                         $this->file->unlockAndRollback(); // unlocks the destination
2453                         wfDebugLog( 'imagemove', "Error in moving files: " . $statusMove->getWikiText() );
2454                         $statusMove->ok = false;
2455                         return $statusMove;
2456                 }
2457                 $this->file->unlock(); // done
2458
2459                 // Everything went ok, remove the source files
2460                 $this->cleanupSource( $triplets );
2461
2462                 $status->merge( $statusDb );
2463                 $status->merge( $statusMove );
2464
2465                 return $status;
2466         }
2467
2468         /**
2469          * Do the database updates and return a new FileRepoStatus indicating how
2470          * many rows where updated.
2471          *
2472          * @return FileRepoStatus
2473          */
2474         function doDBUpdates() {
2475                 $repo = $this->file->repo;
2476                 $status = $repo->newGood();
2477                 $dbw = $this->db;
2478
2479                 // Update current image
2480                 $dbw->update(
2481                         'image',
2482                         array( 'img_name' => $this->newName ),
2483                         array( 'img_name' => $this->oldName ),
2484                         __METHOD__
2485                 );
2486
2487                 if ( $dbw->affectedRows() ) {
2488                         $status->successCount++;
2489                 } else {
2490                         $status->failCount++;
2491                         $status->fatal( 'imageinvalidfilename' );
2492                         return $status;
2493                 }
2494
2495                 // Update old images
2496                 $dbw->update(
2497                         'oldimage',
2498                         array(
2499                                 'oi_name' => $this->newName,
2500                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name',
2501                                         $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2502                         ),
2503                         array( 'oi_name' => $this->oldName ),
2504                         __METHOD__
2505                 );
2506
2507                 $affected = $dbw->affectedRows();
2508                 $total = $this->oldCount;
2509                 $status->successCount += $affected;
2510                 // Bug 34934: $total is based on files that actually exist.
2511                 // There may be more DB rows than such files, in which case $affected
2512                 // can be greater than $total. We use max() to avoid negatives here.
2513                 $status->failCount += max( 0, $total - $affected );
2514                 if ( $status->failCount ) {
2515                         $status->error( 'imageinvalidfilename' );
2516                 }
2517
2518                 return $status;
2519         }
2520
2521         /**
2522          * Generate triplets for FileRepo::storeBatch().
2523          * @return array
2524          */
2525         function getMoveTriplets() {
2526                 $moves = array_merge( array( $this->cur ), $this->olds );
2527                 $triplets = array();    // The format is: (srcUrl, destZone, destUrl)
2528
2529                 foreach ( $moves as $move ) {
2530                         // $move: (oldRelativePath, newRelativePath)
2531                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2532                         $triplets[] = array( $srcUrl, 'public', $move[1] );
2533                         wfDebugLog( 'imagemove', "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}" );
2534                 }
2535
2536                 return $triplets;
2537         }
2538
2539         /**
2540          * Removes non-existent files from move batch.
2541          * @param $triplets array
2542          * @return array
2543          */
2544         function removeNonexistentFiles( $triplets ) {
2545                 $files = array();
2546
2547                 foreach ( $triplets as $file ) {
2548                         $files[$file[0]] = $file[0];
2549                 }
2550
2551                 $result = $this->file->repo->fileExistsBatch( $files );
2552                 $filteredTriplets = array();
2553
2554                 foreach ( $triplets as $file ) {
2555                         if ( $result[$file[0]] ) {
2556                                 $filteredTriplets[] = $file;
2557                         } else {
2558                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
2559                         }
2560                 }
2561
2562                 return $filteredTriplets;
2563         }
2564
2565         /**
2566          * Cleanup a partially moved array of triplets by deleting the target
2567          * files. Called if something went wrong half way.
2568          */
2569         function cleanupTarget( $triplets ) {
2570                 // Create dest pairs from the triplets
2571                 $pairs = array();
2572                 foreach ( $triplets as $triplet ) {
2573                         // $triplet: (old source virtual URL, dst zone, dest rel)
2574                         $pairs[] = array( $triplet[1], $triplet[2] );
2575                 }
2576
2577                 $this->file->repo->cleanupBatch( $pairs );
2578         }
2579
2580         /**
2581          * Cleanup a fully moved array of triplets by deleting the source files.
2582          * Called at the end of the move process if everything else went ok.
2583          */
2584         function cleanupSource( $triplets ) {
2585                 // Create source file names from the triplets
2586                 $files = array();
2587                 foreach ( $triplets as $triplet ) {
2588                         $files[] = $triplet[0];
2589                 }
2590
2591                 $this->file->repo->cleanupBatch( $files );
2592         }
2593 }