includes/filerepo/file/LocalFile.php

   1 <?php
   2 /**
   3  * Local file in the wiki's own database.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup FileAbstraction
  22  */
  23
  24 /**
  25  * Bump this number when serialized cache records may be incompatible.
  26  */
  27 define( 'MW_FILE_VERSION', 9 );
  28
  29 /**
  30  * Class to represent a local file in the wiki's own database
  31  *
  32  * Provides methods to retrieve paths (physical, logical, URL),
  33  * to generate image thumbnails or for uploading.
  34  *
  35  * Note that only the repo object knows what its file class is called. You should
  36  * never name a file class explictly outside of the repo class. Instead use the
  37  * repo's factory functions to generate file objects, for example:
  38  *
  39  * RepoGroup::singleton()->getLocalRepo()->newFile( $title );
  40  *
  41  * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
  42  * in most cases.
  43  *
  44  * @ingroup FileAbstraction
  45  */
  46 class LocalFile extends File {
  47         const CACHE_FIELD_MAX_LEN = 1000;
  48
  49         /** @var bool Does the file exist on disk? (loadFromXxx) */
  50         protected $fileExists;
  51
  52         /** @var int image width */
  53         protected $width;
  54
  55         /** @var int image height */
  56         protected $height;
  57
  58         /** @var int Returned by getimagesize (loadFromXxx) */
  59         protected $bits;
  60
  61         /** @var string MEDIATYPE_xxx (bitmap, drawing, audio...) */
  62         protected $media_type;
  63
  64         /** @var string MIME type, determined by MimeMagic::guessMimeType */
  65         protected $mime;
  66
  67         /** @var int Size in bytes (loadFromXxx) */
  68         protected $size;
  69
  70         /** @var string Handler-specific metadata */
  71         protected $metadata;
  72
  73         /** @var string SHA-1 base 36 content hash */
  74         protected $sha1;
  75
  76         /** @var bool Whether or not core data has been loaded from the database (loadFromXxx) */
  77         protected $dataLoaded;
  78
  79         /** @var bool Whether or not lazy-loaded data has been loaded from the database */
  80         protected $extraDataLoaded;
  81
  82         /** @var int Bitfield akin to rev_deleted */
  83         protected $deleted;
  84
  85         /** @var string */
  86         protected $repoClass = 'LocalRepo';
  87
  88         /** @var int Number of line to return by nextHistoryLine() (constructor) */
  89         private $historyLine;
  90
  91         /** @var int Result of the query for the file's history (nextHistoryLine) */
  92         private $historyRes;
  93
  94         /** @var string Major mime type */
  95         private $major_mime;
  96
  97         /** @var string Minor mime type */
  98         private $minor_mime;
  99
 100         /** @var string Upload timestamp */
 101         private $timestamp;
 102
 103         /** @var int User ID of uploader */
 104         private $user;
 105
 106         /** @var string User name of uploader */
 107         private $user_text;
 108
 109         /** @var string Description of current revision of the file */
 110         private $description;
 111
 112         /** @var bool Whether the row was upgraded on load */
 113         private $upgraded;
 114
 115         /** @var bool True if the image row is locked */
 116         private $locked;
 117
 118         /** @var bool True if the image row is locked with a lock initiated transaction */
 119         private $lockedOwnTrx;
 120
 121         /** @var bool True if file is not present in file system. Not to be cached in memcached */
 122         private $missing;
 123
 124         /** @var int UNIX timestamp of last markVolatile() call */
 125         private $lastMarkedVolatile = 0;
 126
 127         const LOAD_ALL = 1; // integer; load all the lazy fields too (like metadata)
 128         const LOAD_VIA_SLAVE = 2; // integer; use a slave to load the data
 129
 130         const VOLATILE_TTL = 300; // integer; seconds
 131
 132         /**
 133          * Create a LocalFile from a title
 134          * Do not call this except from inside a repo class.
 135          *
 136          * Note: $unused param is only here to avoid an E_STRICT
 137          *
 138          * @param Title $title
 139          * @param FileRepo $repo
 140          * @param null $unused
 141          *
 142          * @return LocalFile
 143          */
 144         static function newFromTitle( $title, $repo, $unused = null ) {
 145                 return new self( $title, $repo );
 146         }
 147
 148         /**
 149          * Create a LocalFile from a title
 150          * Do not call this except from inside a repo class.
 151          *
 152          * @param stdClass $row
 153          * @param FileRepo $repo
 154          *
 155          * @return LocalFile
 156          */
 157         static function newFromRow( $row, $repo ) {
 158                 $title = Title::makeTitle( NS_FILE, $row->img_name );
 159                 $file = new self( $title, $repo );
 160                 $file->loadFromRow( $row );
 161
 162                 return $file;
 163         }
 164
 165         /**
 166          * Create a LocalFile from a SHA-1 key
 167          * Do not call this except from inside a repo class.
 168          *
 169          * @param string $sha1 base-36 SHA-1
 170          * @param LocalRepo $repo
 171          * @param string|bool $timestamp MW_timestamp (optional)
 172          * @return bool|LocalFile
 173          */
 174         static function newFromKey( $sha1, $repo, $timestamp = false ) {
 175                 $dbr = $repo->getSlaveDB();
 176
 177                 $conds = array( 'img_sha1' => $sha1 );
 178                 if ( $timestamp ) {
 179                         $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
 180                 }
 181
 182                 $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ );
 183                 if ( $row ) {
 184                         return self::newFromRow( $row, $repo );
 185                 } else {
 186                         return false;
 187                 }
 188         }
 189
 190         /**
 191          * Fields in the image table
 192          * @return array
 193          */
 194         static function selectFields() {
 195                 return array(
 196                         'img_name',
 197                         'img_size',
 198                         'img_width',
 199                         'img_height',
 200                         'img_metadata',
 201                         'img_bits',
 202                         'img_media_type',
 203                         'img_major_mime',
 204                         'img_minor_mime',
 205                         'img_description',
 206                         'img_user',
 207                         'img_user_text',
 208                         'img_timestamp',
 209                         'img_sha1',
 210                 );
 211         }
 212
 213         /**
 214          * Constructor.
 215          * Do not call this except from inside a repo class.
 216          * @param Title $title
 217          * @param FileRepo $repo
 218          */
 219         function __construct( $title, $repo ) {
 220                 parent::__construct( $title, $repo );
 221
 222                 $this->metadata = '';
 223                 $this->historyLine = 0;
 224                 $this->historyRes = null;
 225                 $this->dataLoaded = false;
 226                 $this->extraDataLoaded = false;
 227
 228                 $this->assertRepoDefined();
 229                 $this->assertTitleDefined();
 230         }
 231
 232         /**
 233          * Get the memcached key for the main data for this file, or false if
 234          * there is no access to the shared cache.
 235          * @return string|bool
 236          */
 237         function getCacheKey() {
 238                 $hashedName = md5( $this->getName() );
 239
 240                 return $this->repo->getSharedCacheKey( 'file', $hashedName );
 241         }
 242
 243         /**
 244          * Try to load file metadata from memcached. Returns true on success.
 245          * @return bool
 246          */
 247         function loadFromCache() {
 248                 global $wgMemc;
 249
 250                 wfProfileIn( __METHOD__ );
 251                 $this->dataLoaded = false;
 252                 $this->extraDataLoaded = false;
 253                 $key = $this->getCacheKey();
 254
 255                 if ( !$key ) {
 256                         wfProfileOut( __METHOD__ );
 257
 258                         return false;
 259                 }
 260
 261                 $cachedValues = $wgMemc->get( $key );
 262
 263                 // Check if the key existed and belongs to this version of MediaWiki
 264                 if ( isset( $cachedValues['version'] ) && $cachedValues['version'] == MW_FILE_VERSION ) {
 265                         wfDebug( "Pulling file metadata from cache key $key\n" );
 266                         $this->fileExists = $cachedValues['fileExists'];
 267                         if ( $this->fileExists ) {
 268                                 $this->setProps( $cachedValues );
 269                         }
 270                         $this->dataLoaded = true;
 271                         $this->extraDataLoaded = true;
 272                         foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 273                                 $this->extraDataLoaded = $this->extraDataLoaded && isset( $cachedValues[$field] );
 274                         }
 275                 }
 276
 277                 if ( $this->dataLoaded ) {
 278                         wfIncrStats( 'image_cache_hit' );
 279                 } else {
 280                         wfIncrStats( 'image_cache_miss' );
 281                 }
 282
 283                 wfProfileOut( __METHOD__ );
 284
 285                 return $this->dataLoaded;
 286         }
 287
 288         /**
 289          * Save the file metadata to memcached
 290          */
 291         function saveToCache() {
 292                 global $wgMemc;
 293
 294                 $this->load();
 295                 $key = $this->getCacheKey();
 296
 297                 if ( !$key ) {
 298                         return;
 299                 }
 300
 301                 $fields = $this->getCacheFields( '' );
 302                 $cache = array( 'version' => MW_FILE_VERSION );
 303                 $cache['fileExists'] = $this->fileExists;
 304
 305                 if ( $this->fileExists ) {
 306                         foreach ( $fields as $field ) {
 307                                 $cache[$field] = $this->$field;
 308                         }
 309                 }
 310
 311                 // Strip off excessive entries from the subset of fields that can become large.
 312                 // If the cache value gets to large it will not fit in memcached and nothing will
 313                 // get cached at all, causing master queries for any file access.
 314                 foreach ( $this->getLazyCacheFields( '' ) as $field ) {
 315                         if ( isset( $cache[$field] ) && strlen( $cache[$field] ) > 100 * 1024 ) {
 316                                 unset( $cache[$field] ); // don't let the value get too big
 317                         }
 318                 }
 319
 320                 // Cache presence for 1 week and negatives for 1 day
 321                 $wgMemc->set( $key, $cache, $this->fileExists ? 86400 * 7 : 86400 );
 322         }
 323
 324         /**
 325          * Load metadata from the file itself
 326          */
 327         function loadFromFile() {
 328                 $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 329                 $this->setProps( $props );
 330         }
 331
 332         /**
 333          * @param string $prefix
 334          * @return array
 335          */
 336         function getCacheFields( $prefix = 'img_' ) {
 337                 static $fields = array( 'size', 'width', 'height', 'bits', 'media_type',
 338                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user',
 339                         'user_text', 'description' );
 340                 static $results = array();
 341
 342                 if ( $prefix == '' ) {
 343                         return $fields;
 344                 }
 345
 346                 if ( !isset( $results[$prefix] ) ) {
 347                         $prefixedFields = array();
 348                         foreach ( $fields as $field ) {
 349                                 $prefixedFields[] = $prefix . $field;
 350                         }
 351                         $results[$prefix] = $prefixedFields;
 352                 }
 353
 354                 return $results[$prefix];
 355         }
 356
 357         /**
 358          * @param string $prefix
 359          * @return array
 360          */
 361         function getLazyCacheFields( $prefix = 'img_' ) {
 362                 static $fields = array( 'metadata' );
 363                 static $results = array();
 364
 365                 if ( $prefix == '' ) {
 366                         return $fields;
 367                 }
 368
 369                 if ( !isset( $results[$prefix] ) ) {
 370                         $prefixedFields = array();
 371                         foreach ( $fields as $field ) {
 372                                 $prefixedFields[] = $prefix . $field;
 373                         }
 374                         $results[$prefix] = $prefixedFields;
 375                 }
 376
 377                 return $results[$prefix];
 378         }
 379
 380         /**
 381          * Load file metadata from the DB
 382          */
 383         function loadFromDB( $flags = 0 ) {
 384                 # Polymorphic function name to distinguish foreign and local fetches
 385                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 386                 wfProfileIn( $fname );
 387
 388                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 389                 $this->dataLoaded = true;
 390                 $this->extraDataLoaded = true;
 391
 392                 $dbr = ( $flags & self::LOAD_VIA_SLAVE )
 393                         ? $this->repo->getSlaveDB()
 394                         : $this->repo->getMasterDB();
 395
 396                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 397                         array( 'img_name' => $this->getName() ), $fname );
 398
 399                 if ( $row ) {
 400                         $this->loadFromRow( $row );
 401                 } else {
 402                         $this->fileExists = false;
 403                 }
 404
 405                 wfProfileOut( $fname );
 406         }
 407
 408         /**
 409          * Load lazy file metadata from the DB.
 410          * This covers fields that are sometimes not cached.
 411          */
 412         protected function loadExtraFromDB() {
 413                 # Polymorphic function name to distinguish foreign and local fetches
 414                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 415                 wfProfileIn( $fname );
 416
 417                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 418                 $this->extraDataLoaded = true;
 419
 420                 $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getSlaveDB(), $fname );
 421                 if ( !$fieldMap ) {
 422                         $fieldMap = $this->loadFieldsWithTimestamp( $this->repo->getMasterDB(), $fname );
 423                 }
 424
 425                 if ( $fieldMap ) {
 426                         foreach ( $fieldMap as $name => $value ) {
 427                                 $this->$name = $value;
 428                         }
 429                 } else {
 430                         wfProfileOut( $fname );
 431                         throw new MWException( "Could not find data for image '{$this->getName()}'." );
 432                 }
 433
 434                 wfProfileOut( $fname );
 435         }
 436
 437         /**
 438          * @param DatabaseBase $dbr
 439          * @param string $fname
 440          * @return array|false
 441          */
 442         private function loadFieldsWithTimestamp( $dbr, $fname ) {
 443                 $fieldMap = false;
 444
 445                 $row = $dbr->selectRow( 'image', $this->getLazyCacheFields( 'img_' ),
 446                         array( 'img_name' => $this->getName(), 'img_timestamp' => $this->getTimestamp() ),
 447                         $fname );
 448                 if ( $row ) {
 449                         $fieldMap = $this->unprefixRow( $row, 'img_' );
 450                 } else {
 451                         # File may have been uploaded over in the meantime; check the old versions
 452                         $row = $dbr->selectRow( 'oldimage', $this->getLazyCacheFields( 'oi_' ),
 453                                 array( 'oi_name' => $this->getName(), 'oi_timestamp' => $this->getTimestamp() ),
 454                                 $fname );
 455                         if ( $row ) {
 456                                 $fieldMap = $this->unprefixRow( $row, 'oi_' );
 457                         }
 458                 }
 459
 460                 return $fieldMap;
 461         }
 462
 463         /**
 464          * @param array $row Row
 465          * @param string $prefix
 466          * @throws MWException
 467          * @return array
 468          */
 469         protected function unprefixRow( $row, $prefix = 'img_' ) {
 470                 $array = (array)$row;
 471                 $prefixLength = strlen( $prefix );
 472
 473                 // Sanity check prefix once
 474                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 475                         throw new MWException( __METHOD__ . ': incorrect $prefix parameter' );
 476                 }
 477
 478                 $decoded = array();
 479                 foreach ( $array as $name => $value ) {
 480                         $decoded[substr( $name, $prefixLength )] = $value;
 481                 }
 482
 483                 return $decoded;
 484         }
 485
 486         /**
 487          * Decode a row from the database (either object or array) to an array
 488          * with timestamps and MIME types decoded, and the field prefix removed.
 489          * @param object $row
 490          * @param string $prefix
 491          * @throws MWException
 492          * @return array
 493          */
 494         function decodeRow( $row, $prefix = 'img_' ) {
 495                 $decoded = $this->unprefixRow( $row, $prefix );
 496
 497                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 498
 499                 if ( empty( $decoded['major_mime'] ) ) {
 500                         $decoded['mime'] = 'unknown/unknown';
 501                 } else {
 502                         if ( !$decoded['minor_mime'] ) {
 503                                 $decoded['minor_mime'] = 'unknown';
 504                         }
 505                         $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime'];
 506                 }
 507
 508                 # Trim zero padding from char/binary field
 509                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 510
 511                 return $decoded;
 512         }
 513
 514         /**
 515          * Load file metadata from a DB result row
 516          *
 517          * @param object $row
 518          * @param string $prefix
 519          */
 520         function loadFromRow( $row, $prefix = 'img_' ) {
 521                 $this->dataLoaded = true;
 522                 $this->extraDataLoaded = true;
 523
 524                 $array = $this->decodeRow( $row, $prefix );
 525
 526                 foreach ( $array as $name => $value ) {
 527                         $this->$name = $value;
 528                 }
 529
 530                 $this->fileExists = true;
 531                 $this->maybeUpgradeRow();
 532         }
 533
 534         /**
 535          * Load file metadata from cache or DB, unless already loaded
 536          * @param int $flags
 537          */
 538         function load( $flags = 0 ) {
 539                 if ( !$this->dataLoaded ) {
 540                         if ( !$this->loadFromCache() ) {
 541                                 $this->loadFromDB( $this->isVolatile() ? 0 : self::LOAD_VIA_SLAVE );
 542                                 $this->saveToCache();
 543                         }
 544                         $this->dataLoaded = true;
 545                 }
 546                 if ( ( $flags & self::LOAD_ALL ) && !$this->extraDataLoaded ) {
 547                         $this->loadExtraFromDB();
 548                 }
 549         }
 550
 551         /**
 552          * Upgrade a row if it needs it
 553          */
 554         function maybeUpgradeRow() {
 555                 global $wgUpdateCompatibleMetadata;
 556                 if ( wfReadOnly() ) {
 557                         return;
 558                 }
 559
 560                 if ( is_null( $this->media_type ) ||
 561                         $this->mime == 'image/svg'
 562                 ) {
 563                         $this->upgradeRow();
 564                         $this->upgraded = true;
 565                 } else {
 566                         $handler = $this->getHandler();
 567                         if ( $handler ) {
 568                                 $validity = $handler->isMetadataValid( $this, $this->getMetadata() );
 569                                 if ( $validity === MediaHandler::METADATA_BAD
 570                                         || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata )
 571                                 ) {
 572                                         $this->upgradeRow();
 573                                         $this->upgraded = true;
 574                                 }
 575                         }
 576                 }
 577         }
 578
 579         function getUpgraded() {
 580                 return $this->upgraded;
 581         }
 582
 583         /**
 584          * Fix assorted version-related problems with the image row by reloading it from the file
 585          */
 586         function upgradeRow() {
 587                 wfProfileIn( __METHOD__ );
 588
 589                 $this->lock(); // begin
 590
 591                 $this->loadFromFile();
 592
 593                 # Don't destroy file info of missing files
 594                 if ( !$this->fileExists ) {
 595                         wfDebug( __METHOD__ . ": file does not exist, aborting\n" );
 596                         wfProfileOut( __METHOD__ );
 597
 598                         return;
 599                 }
 600
 601                 $dbw = $this->repo->getMasterDB();
 602                 list( $major, $minor ) = self::splitMime( $this->mime );
 603
 604                 if ( wfReadOnly() ) {
 605                         wfProfileOut( __METHOD__ );
 606
 607                         return;
 608                 }
 609                 wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" );
 610
 611                 $dbw->update( 'image',
 612                         array(
 613                                 'img_size' => $this->size, // sanity
 614                                 'img_width' => $this->width,
 615                                 'img_height' => $this->height,
 616                                 'img_bits' => $this->bits,
 617                                 'img_media_type' => $this->media_type,
 618                                 'img_major_mime' => $major,
 619                                 'img_minor_mime' => $minor,
 620                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
 621                                 'img_sha1' => $this->sha1,
 622                         ),
 623                         array( 'img_name' => $this->getName() ),
 624                         __METHOD__
 625                 );
 626
 627                 $this->saveToCache();
 628
 629                 $this->unlock(); // done
 630
 631                 wfProfileOut( __METHOD__ );
 632         }
 633
 634         /**
 635          * Set properties in this object to be equal to those given in the
 636          * associative array $info. Only cacheable fields can be set.
 637          * All fields *must* be set in $info except for getLazyCacheFields().
 638          *
 639          * If 'mime' is given, it will be split into major_mime/minor_mime.
 640          * If major_mime/minor_mime are given, $this->mime will also be set.
 641          *
 642          * @param array $info
 643          */
 644         function setProps( $info ) {
 645                 $this->dataLoaded = true;
 646                 $fields = $this->getCacheFields( '' );
 647                 $fields[] = 'fileExists';
 648
 649                 foreach ( $fields as $field ) {
 650                         if ( isset( $info[$field] ) ) {
 651                                 $this->$field = $info[$field];
 652                         }
 653                 }
 654
 655                 // Fix up mime fields
 656                 if ( isset( $info['major_mime'] ) ) {
 657                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 658                 } elseif ( isset( $info['mime'] ) ) {
 659                         $this->mime = $info['mime'];
 660                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 661                 }
 662         }
 663
 664         /** splitMime inherited */
 665         /** getName inherited */
 666         /** getTitle inherited */
 667         /** getURL inherited */
 668         /** getViewURL inherited */
 669         /** getPath inherited */
 670         /** isVisible inhereted */
 671
 672         /**
 673          * @return bool
 674          */
 675         function isMissing() {
 676                 if ( $this->missing === null ) {
 677                         list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl() );
 678                         $this->missing = !$fileExists;
 679                 }
 680
 681                 return $this->missing;
 682         }
 683
 684         /**
 685          * Return the width of the image
 686          *
 687          * @param int $page
 688          * @return int
 689          */
 690         public function getWidth( $page = 1 ) {
 691                 $this->load();
 692
 693                 if ( $this->isMultipage() ) {
 694                         $handler = $this->getHandler();
 695                         if ( !$handler ) {
 696                                 return 0;
 697                         }
 698                         $dim = $handler->getPageDimensions( $this, $page );
 699                         if ( $dim ) {
 700                                 return $dim['width'];
 701                         } else {
 702                                 // For non-paged media, the false goes through an
 703                                 // intval, turning failure into 0, so do same here.
 704                                 return 0;
 705                         }
 706                 } else {
 707                         return $this->width;
 708                 }
 709         }
 710
 711         /**
 712          * Return the height of the image
 713          *
 714          * @param int $page
 715          * @return int
 716          */
 717         public function getHeight( $page = 1 ) {
 718                 $this->load();
 719
 720                 if ( $this->isMultipage() ) {
 721                         $handler = $this->getHandler();
 722                         if ( !$handler ) {
 723                                 return 0;
 724                         }
 725                         $dim = $handler->getPageDimensions( $this, $page );
 726                         if ( $dim ) {
 727                                 return $dim['height'];
 728                         } else {
 729                                 // For non-paged media, the false goes through an
 730                                 // intval, turning failure into 0, so do same here.
 731                                 return 0;
 732                         }
 733                 } else {
 734                         return $this->height;
 735                 }
 736         }
 737
 738         /**
 739          * Returns ID or name of user who uploaded the file
 740          *
 741          * @param string $type 'text' or 'id'
 742          * @return int|string
 743          */
 744         function getUser( $type = 'text' ) {
 745                 $this->load();
 746
 747                 if ( $type == 'text' ) {
 748                         return $this->user_text;
 749                 } elseif ( $type == 'id' ) {
 750                         return $this->user;
 751                 }
 752         }
 753
 754         /**
 755          * Get handler-specific metadata
 756          * @return string
 757          */
 758         function getMetadata() {
 759                 $this->load( self::LOAD_ALL ); // large metadata is loaded in another step
 760                 return $this->metadata;
 761         }
 762
 763         /**
 764          * @return int
 765          */
 766         function getBitDepth() {
 767                 $this->load();
 768
 769                 return $this->bits;
 770         }
 771
 772         /**
 773          * Returns the size of the image file, in bytes
 774          * @return int
 775          */
 776         public function getSize() {
 777                 $this->load();
 778
 779                 return $this->size;
 780         }
 781
 782         /**
 783          * Returns the mime type of the file.
 784          * @return string
 785          */
 786         function getMimeType() {
 787                 $this->load();
 788
 789                 return $this->mime;
 790         }
 791
 792         /**
 793          * Returns the type of the media in the file.
 794          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 795          * @return string
 796          */
 797         function getMediaType() {
 798                 $this->load();
 799
 800                 return $this->media_type;
 801         }
 802
 803         /** canRender inherited */
 804         /** mustRender inherited */
 805         /** allowInlineDisplay inherited */
 806         /** isSafeFile inherited */
 807         /** isTrustedFile inherited */
 808
 809         /**
 810          * Returns true if the file exists on disk.
 811          * @return bool Whether file exist on disk.
 812          */
 813         public function exists() {
 814                 $this->load();
 815
 816                 return $this->fileExists;
 817         }
 818
 819         /** getTransformScript inherited */
 820         /** getUnscaledThumb inherited */
 821         /** thumbName inherited */
 822         /** createThumb inherited */
 823         /** transform inherited */
 824
 825         /**
 826          * Fix thumbnail files from 1.4 or before, with extreme prejudice
 827          * @todo Do we still care about this? Perhaps a maintenance script
 828          *   can be made instead. Enabling this code results in a serious
 829          *   RTT regression for wikis without 404 handling.
 830          *
 831          * @param string $thumbName
 832          */
 833         function migrateThumbFile( $thumbName ) {
 834                 /* Old code for bug 2532
 835                 $thumbDir = $this->getThumbPath();
 836                 $thumbPath = "$thumbDir/$thumbName";
 837                 if ( is_dir( $thumbPath ) ) {
 838                         // Directory where file should be
 839                         // This happened occasionally due to broken migration code in 1.5
 840                         // Rename to broken-*
 841                         for ( $i = 0; $i < 100; $i++ ) {
 842                                 $broken = $this->repo->getZonePath( 'public' ) . "/broken-$i-$thumbName";
 843                                 if ( !file_exists( $broken ) ) {
 844                                         rename( $thumbPath, $broken );
 845                                         break;
 846                                 }
 847                         }
 848                         // Doesn't exist anymore
 849                         clearstatcache();
 850                 }
 851                 */
 852                 /*
 853                 if ( $this->repo->fileExists( $thumbDir ) ) {
 854                         // Delete file where directory should be
 855                         $this->repo->cleanupBatch( array( $thumbDir ) );
 856                 }
 857                 */
 858         }
 859
 860         /** getHandler inherited */
 861         /** iconThumb inherited */
 862         /** getLastError inherited */
 863
 864         /**
 865          * Get all thumbnail names previously generated for this file
 866          * @param string|bool $archiveName Name of an archive file, default false
 867          * @return array first element is the base dir, then files in that base dir.
 868          */
 869         function getThumbnails( $archiveName = false ) {
 870                 if ( $archiveName ) {
 871                         $dir = $this->getArchiveThumbPath( $archiveName );
 872                 } else {
 873                         $dir = $this->getThumbPath();
 874                 }
 875
 876                 $backend = $this->repo->getBackend();
 877                 $files = array( $dir );
 878                 try {
 879                         $iterator = $backend->getFileList( array( 'dir' => $dir ) );
 880                         foreach ( $iterator as $file ) {
 881                                 $files[] = $file;
 882                         }
 883                 } catch ( FileBackendError $e ) {
 884                 } // suppress (bug 54674)
 885
 886                 return $files;
 887         }
 888
 889         /**
 890          * Refresh metadata in memcached, but don't touch thumbnails or squid
 891          */
 892         function purgeMetadataCache() {
 893                 $this->loadFromDB();
 894                 $this->saveToCache();
 895                 $this->purgeHistory();
 896         }
 897
 898         /**
 899          * Purge the shared history (OldLocalFile) cache.
 900          *
 901          * @note This used to purge old thumbnails as well.
 902          */
 903         function purgeHistory() {
 904                 global $wgMemc;
 905
 906                 $hashedName = md5( $this->getName() );
 907                 $oldKey = $this->repo->getSharedCacheKey( 'oldfile', $hashedName );
 908
 909                 if ( $oldKey ) {
 910                         $wgMemc->delete( $oldKey );
 911                 }
 912         }
 913
 914         /**
 915          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid.
 916          *
 917          * @param array $options An array potentially with the key forThumbRefresh.
 918          *
 919          * @note This used to purge old thumbnails by default as well, but doesn't anymore.
 920          */
 921         function purgeCache( $options = array() ) {
 922                 wfProfileIn( __METHOD__ );
 923                 // Refresh metadata cache
 924                 $this->purgeMetadataCache();
 925
 926                 // Delete thumbnails
 927                 $this->purgeThumbnails( $options );
 928
 929                 // Purge squid cache for this file
 930                 SquidUpdate::purge( array( $this->getURL() ) );
 931                 wfProfileOut( __METHOD__ );
 932         }
 933
 934         /**
 935          * Delete cached transformed files for an archived version only.
 936          * @param string $archiveName Name of the archived file
 937          */
 938         function purgeOldThumbnails( $archiveName ) {
 939                 global $wgUseSquid;
 940                 wfProfileIn( __METHOD__ );
 941
 942                 // Get a list of old thumbnails and URLs
 943                 $files = $this->getThumbnails( $archiveName );
 944
 945                 // Purge any custom thumbnail caches
 946                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, $archiveName ) );
 947
 948                 $dir = array_shift( $files );
 949                 $this->purgeThumbList( $dir, $files );
 950
 951                 // Purge the squid
 952                 if ( $wgUseSquid ) {
 953                         $urls = array();
 954                         foreach ( $files as $file ) {
 955                                 $urls[] = $this->getArchiveThumbUrl( $archiveName, $file );
 956                         }
 957                         SquidUpdate::purge( $urls );
 958                 }
 959
 960                 wfProfileOut( __METHOD__ );
 961         }
 962
 963         /**
 964          * Delete cached transformed files for the current version only.
 965          */
 966         function purgeThumbnails( $options = array() ) {
 967                 global $wgUseSquid;
 968                 wfProfileIn( __METHOD__ );
 969
 970                 // Delete thumbnails
 971                 $files = $this->getThumbnails();
 972                 // Always purge all files from squid regardless of handler filters
 973                 $urls = array();
 974                 if ( $wgUseSquid ) {
 975                         foreach ( $files as $file ) {
 976                                 $urls[] = $this->getThumbUrl( $file );
 977                         }
 978                         array_shift( $urls ); // don't purge directory
 979                 }
 980
 981                 // Give media handler a chance to filter the file purge list
 982                 if ( !empty( $options['forThumbRefresh'] ) ) {
 983                         $handler = $this->getHandler();
 984                         if ( $handler ) {
 985                                 $handler->filterThumbnailPurgeList( $files, $options );
 986                         }
 987                 }
 988
 989                 // Purge any custom thumbnail caches
 990                 wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, false ) );
 991
 992                 $dir = array_shift( $files );
 993                 $this->purgeThumbList( $dir, $files );
 994
 995                 // Purge the squid
 996                 if ( $wgUseSquid ) {
 997                         SquidUpdate::purge( $urls );
 998                 }
 999
1000                 wfProfileOut( __METHOD__ );
1001         }
1002
1003         /**
1004          * Delete a list of thumbnails visible at urls
1005          * @param string $dir Base dir of the files.
1006          * @param array $files Array of strings: relative filenames (to $dir)
1007          */
1008         protected function purgeThumbList( $dir, $files ) {
1009                 $fileListDebug = strtr(
1010                         var_export( $files, true ),
1011                         array( "\n" => '' )
1012                 );
1013                 wfDebug( __METHOD__ . ": $fileListDebug\n" );
1014
1015                 $purgeList = array();
1016                 foreach ( $files as $file ) {
1017                         # Check that the base file name is part of the thumb name
1018                         # This is a basic sanity check to avoid erasing unrelated directories
1019                         if ( strpos( $file, $this->getName() ) !== false
1020                                 || strpos( $file, "-thumbnail" ) !== false // "short" thumb name
1021                         ) {
1022                                 $purgeList[] = "{$dir}/{$file}";
1023                         }
1024                 }
1025
1026                 # Delete the thumbnails
1027                 $this->repo->quickPurgeBatch( $purgeList );
1028                 # Clear out the thumbnail directory if empty
1029                 $this->repo->quickCleanDir( $dir );
1030         }
1031
1032         /** purgeDescription inherited */
1033         /** purgeEverything inherited */
1034
1035         /**
1036          * @param int $limit Optional: Limit to number of results
1037          * @param int $start Optional: Timestamp, start from
1038          * @param int $end Optional: Timestamp, end at
1039          * @param bool $inc
1040          * @return array
1041          */
1042         function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
1043                 $dbr = $this->repo->getSlaveDB();
1044                 $tables = array( 'oldimage' );
1045                 $fields = OldLocalFile::selectFields();
1046                 $conds = $opts = $join_conds = array();
1047                 $eq = $inc ? '=' : '';
1048                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() );
1049
1050                 if ( $start ) {
1051                         $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) );
1052                 }
1053
1054                 if ( $end ) {
1055                         $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) );
1056                 }
1057
1058                 if ( $limit ) {
1059                         $opts['LIMIT'] = $limit;
1060                 }
1061
1062                 // Search backwards for time > x queries
1063                 $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC';
1064                 $opts['ORDER BY'] = "oi_timestamp $order";
1065                 $opts['USE INDEX'] = array( 'oldimage' => 'oi_name_timestamp' );
1066
1067                 wfRunHooks( 'LocalFile::getHistory', array( &$this, &$tables, &$fields,
1068                         &$conds, &$opts, &$join_conds ) );
1069
1070                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
1071                 $r = array();
1072
1073                 foreach ( $res as $row ) {
1074                         $r[] = $this->repo->newFileFromRow( $row );
1075                 }
1076
1077                 if ( $order == 'ASC' ) {
1078                         $r = array_reverse( $r ); // make sure it ends up descending
1079                 }
1080
1081                 return $r;
1082         }
1083
1084         /**
1085          * Returns the history of this file, line by line.
1086          * starts with current version, then old versions.
1087          * uses $this->historyLine to check which line to return:
1088          *  0      return line for current version
1089          *  1      query for old versions, return first one
1090          *  2, ... return next old version from above query
1091          * @return bool
1092          */
1093         public function nextHistoryLine() {
1094                 # Polymorphic function name to distinguish foreign and local fetches
1095                 $fname = get_class( $this ) . '::' . __FUNCTION__;
1096
1097                 $dbr = $this->repo->getSlaveDB();
1098
1099                 if ( $this->historyLine == 0 ) { // called for the first time, return line from cur
1100                         $this->historyRes = $dbr->select( 'image',
1101                                 array(
1102                                         '*',
1103                                         "'' AS oi_archive_name",
1104                                         '0 as oi_deleted',
1105                                         'img_sha1'
1106                                 ),
1107                                 array( 'img_name' => $this->title->getDBkey() ),
1108                                 $fname
1109                         );
1110
1111                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
1112                                 $this->historyRes = null;
1113
1114                                 return false;
1115                         }
1116                 } elseif ( $this->historyLine == 1 ) {
1117                         $this->historyRes = $dbr->select( 'oldimage', '*',
1118                                 array( 'oi_name' => $this->title->getDBkey() ),
1119                                 $fname,
1120                                 array( 'ORDER BY' => 'oi_timestamp DESC' )
1121                         );
1122                 }
1123                 $this->historyLine++;
1124
1125                 return $dbr->fetchObject( $this->historyRes );
1126         }
1127
1128         /**
1129          * Reset the history pointer to the first element of the history
1130          */
1131         public function resetHistory() {
1132                 $this->historyLine = 0;
1133
1134                 if ( !is_null( $this->historyRes ) ) {
1135                         $this->historyRes = null;
1136                 }
1137         }
1138
1139         /** getHashPath inherited */
1140         /** getRel inherited */
1141         /** getUrlRel inherited */
1142         /** getArchiveRel inherited */
1143         /** getArchivePath inherited */
1144         /** getThumbPath inherited */
1145         /** getArchiveUrl inherited */
1146         /** getThumbUrl inherited */
1147         /** getArchiveVirtualUrl inherited */
1148         /** getThumbVirtualUrl inherited */
1149         /** isHashed inherited */
1150
1151         /**
1152          * Upload a file and record it in the DB
1153          * @param string $srcPath Source storage path, virtual URL, or filesystem path
1154          * @param string $comment Upload description
1155          * @param string $pageText Text to use for the new description page,
1156          *   if a new description page is created
1157          * @param int|bool $flags Flags for publish()
1158          * @param array|bool $props File properties, if known. This can be used to
1159          *   reduce the upload time when uploading virtual URLs for which the file
1160          *   info is already known
1161          * @param string|bool $timestamp Timestamp for img_timestamp, or false to use the
1162          *   current time
1163          * @param User|null $user User object or null to use $wgUser
1164          *
1165          * @return FileRepoStatus On success, the value member contains the
1166          *     archive name, or an empty string if it was a new file.
1167          */
1168         function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false,
1169                 $timestamp = false, $user = null
1170         ) {
1171                 global $wgContLang;
1172
1173                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1174                         return $this->readOnlyFatalStatus();
1175                 }
1176
1177                 if ( !$props ) {
1178                         wfProfileIn( __METHOD__ . '-getProps' );
1179                         if ( $this->repo->isVirtualUrl( $srcPath )
1180                                 || FileBackend::isStoragePath( $srcPath )
1181                         ) {
1182                                 $props = $this->repo->getFileProps( $srcPath );
1183                         } else {
1184                                 $props = FSFile::getPropsFromPath( $srcPath );
1185                         }
1186                         wfProfileOut( __METHOD__ . '-getProps' );
1187                 }
1188
1189                 $options = array();
1190                 $handler = MediaHandler::getHandler( $props['mime'] );
1191                 if ( $handler ) {
1192                         $options['headers'] = $handler->getStreamHeaders( $props['metadata'] );
1193                 } else {
1194                         $options['headers'] = array();
1195                 }
1196
1197                 // Trim spaces on user supplied text
1198                 $comment = trim( $comment );
1199
1200                 // Truncate nicely or the DB will do it for us
1201                 // non-nicely (dangling multi-byte chars, non-truncated version in cache).
1202                 $comment = $wgContLang->truncate( $comment, 255 );
1203                 $this->lock(); // begin
1204                 $status = $this->publish( $srcPath, $flags, $options );
1205
1206                 if ( $status->successCount >= 2 ) {
1207                         // There will be a copy+(one of move,copy,store).
1208                         // The first succeeding does not commit us to updating the DB
1209                         // since it simply copied the current version to a timestamped file name.
1210                         // It is only *preferable* to avoid leaving such files orphaned.
1211                         // Once the second operation goes through, then the current version was
1212                         // updated and we must therefore update the DB too.
1213                         if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp, $user ) ) {
1214                                 $status->fatal( 'filenotfound', $srcPath );
1215                         }
1216                 }
1217
1218                 $this->unlock(); // done
1219
1220                 return $status;
1221         }
1222
1223         /**
1224          * Record a file upload in the upload log and the image table
1225          * @param string $oldver
1226          * @param string $desc
1227          * @param string $license
1228          * @param string $copyStatus
1229          * @param string $source
1230          * @param bool $watch
1231          * @param string|bool $timestamp
1232          * @param User|null $user User object or null to use $wgUser
1233          * @return bool
1234          */
1235         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
1236                 $watch = false, $timestamp = false, User $user = null ) {
1237                 if ( !$user ) {
1238                         global $wgUser;
1239                         $user = $wgUser;
1240                 }
1241
1242                 $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source );
1243
1244                 if ( !$this->recordUpload2( $oldver, $desc, $pageText, false, $timestamp, $user ) ) {
1245                         return false;
1246                 }
1247
1248                 if ( $watch ) {
1249                         $user->addWatch( $this->getTitle() );
1250                 }
1251
1252                 return true;
1253         }
1254
1255         /**
1256          * Record a file upload in the upload log and the image table
1257          * @param string $oldver
1258          * @param string $comment
1259          * @param string $pageText
1260          * @param bool|array $props
1261          * @param string|bool $timestamp
1262          * @param null|User $user
1263          * @return bool
1264          */
1265         function recordUpload2( $oldver, $comment, $pageText, $props = false, $timestamp = false,
1266                 $user = null
1267         ) {
1268                 wfProfileIn( __METHOD__ );
1269
1270                 if ( is_null( $user ) ) {
1271                         global $wgUser;
1272                         $user = $wgUser;
1273                 }
1274
1275                 $dbw = $this->repo->getMasterDB();
1276                 $dbw->begin( __METHOD__ );
1277
1278                 if ( !$props ) {
1279                         wfProfileIn( __METHOD__ . '-getProps' );
1280                         $props = $this->repo->getFileProps( $this->getVirtualUrl() );
1281                         wfProfileOut( __METHOD__ . '-getProps' );
1282                 }
1283
1284                 if ( $timestamp === false ) {
1285                         $timestamp = $dbw->timestamp();
1286                 }
1287
1288                 $props['description'] = $comment;
1289                 $props['user'] = $user->getId();
1290                 $props['user_text'] = $user->getName();
1291                 $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
1292                 $this->setProps( $props );
1293
1294                 # Fail now if the file isn't there
1295                 if ( !$this->fileExists ) {
1296                         wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" );
1297                         wfProfileOut( __METHOD__ );
1298
1299                         return false;
1300                 }
1301
1302                 $reupload = false;
1303
1304                 # Test to see if the row exists using INSERT IGNORE
1305                 # This avoids race conditions by locking the row until the commit, and also
1306                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
1307                 $dbw->insert( 'image',
1308                         array(
1309                                 'img_name' => $this->getName(),
1310                                 'img_size' => $this->size,
1311                                 'img_width' => intval( $this->width ),
1312                                 'img_height' => intval( $this->height ),
1313                                 'img_bits' => $this->bits,
1314                                 'img_media_type' => $this->media_type,
1315                                 'img_major_mime' => $this->major_mime,
1316                                 'img_minor_mime' => $this->minor_mime,
1317                                 'img_timestamp' => $timestamp,
1318                                 'img_description' => $comment,
1319                                 'img_user' => $user->getId(),
1320                                 'img_user_text' => $user->getName(),
1321                                 'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1322                                 'img_sha1' => $this->sha1
1323                         ),
1324                         __METHOD__,
1325                         'IGNORE'
1326                 );
1327                 if ( $dbw->affectedRows() == 0 ) {
1328                         # (bug 34993) Note: $oldver can be empty here, if the previous
1329                         # version of the file was broken. Allow registration of the new
1330                         # version to continue anyway, because that's better than having
1331                         # an image that's not fixable by user operations.
1332
1333                         $reupload = true;
1334                         # Collision, this is an update of a file
1335                         # Insert previous contents into oldimage
1336                         $dbw->insertSelect( 'oldimage', 'image',
1337                                 array(
1338                                         'oi_name' => 'img_name',
1339                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
1340                                         'oi_size' => 'img_size',
1341                                         'oi_width' => 'img_width',
1342                                         'oi_height' => 'img_height',
1343                                         'oi_bits' => 'img_bits',
1344                                         'oi_timestamp' => 'img_timestamp',
1345                                         'oi_description' => 'img_description',
1346                                         'oi_user' => 'img_user',
1347                                         'oi_user_text' => 'img_user_text',
1348                                         'oi_metadata' => 'img_metadata',
1349                                         'oi_media_type' => 'img_media_type',
1350                                         'oi_major_mime' => 'img_major_mime',
1351                                         'oi_minor_mime' => 'img_minor_mime',
1352                                         'oi_sha1' => 'img_sha1'
1353                                 ),
1354                                 array( 'img_name' => $this->getName() ),
1355                                 __METHOD__
1356                         );
1357
1358                         # Update the current image row
1359                         $dbw->update( 'image',
1360                                 array( /* SET */
1361                                         'img_size' => $this->size,
1362                                         'img_width' => intval( $this->width ),
1363                                         'img_height' => intval( $this->height ),
1364                                         'img_bits' => $this->bits,
1365                                         'img_media_type' => $this->media_type,
1366                                         'img_major_mime' => $this->major_mime,
1367                                         'img_minor_mime' => $this->minor_mime,
1368                                         'img_timestamp' => $timestamp,
1369                                         'img_description' => $comment,
1370                                         'img_user' => $user->getId(),
1371                                         'img_user_text' => $user->getName(),
1372                                         'img_metadata' => $dbw->encodeBlob( $this->metadata ),
1373                                         'img_sha1' => $this->sha1
1374                                 ),
1375                                 array( 'img_name' => $this->getName() ),
1376                                 __METHOD__
1377                         );
1378                 } else {
1379                         # This is a new file, so update the image count
1380                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
1381                 }
1382
1383                 $descTitle = $this->getTitle();
1384                 $wikiPage = new WikiFilePage( $descTitle );
1385                 $wikiPage->setFile( $this );
1386
1387                 # Add the log entry
1388                 $action = $reupload ? 'overwrite' : 'upload';
1389
1390                 $logEntry = new ManualLogEntry( 'upload', $action );
1391                 $logEntry->setPerformer( $user );
1392                 $logEntry->setComment( $comment );
1393                 $logEntry->setTarget( $descTitle );
1394
1395                 // Allow people using the api to associate log entries with the upload.
1396                 // Log has a timestamp, but sometimes different from upload timestamp.
1397                 $logEntry->setParameters(
1398                         array(
1399                                 'img_sha1' => $this->sha1,
1400                                 'img_timestamp' => $timestamp,
1401                         )
1402                 );
1403                 // Note we keep $logId around since during new image
1404                 // creation, page doesn't exist yet, so log_page = 0
1405                 // but we want it to point to the page we're making,
1406                 // so we later modify the log entry.
1407                 // For a similar reason, we avoid making an RC entry
1408                 // now and wait until the page exists.
1409                 $logId = $logEntry->insert();
1410
1411                 $exists = $descTitle->exists();
1412                 if ( $exists ) {
1413                         // Page exists, do RC entry now (otherwise we wait for later).
1414                         $logEntry->publish( $logId );
1415                 }
1416                 wfProfileIn( __METHOD__ . '-edit' );
1417
1418                 if ( $exists ) {
1419                         # Create a null revision
1420                         $latest = $descTitle->getLatestRevID();
1421                         $editSummary = LogFormatter::newFromEntry( $logEntry )->getPlainActionText();
1422
1423                         $nullRevision = Revision::newNullRevision(
1424                                 $dbw,
1425                                 $descTitle->getArticleID(),
1426                                 $editSummary,
1427                                 false,
1428                                 $user
1429                         );
1430                         if ( !is_null( $nullRevision ) ) {
1431                                 $nullRevision->insertOn( $dbw );
1432
1433                                 wfRunHooks( 'NewRevisionFromEditComplete', array( $wikiPage, $nullRevision, $latest, $user ) );
1434                                 $wikiPage->updateRevisionOn( $dbw, $nullRevision );
1435                         }
1436                 }
1437
1438                 # Commit the transaction now, in case something goes wrong later
1439                 # The most important thing is that files don't get lost, especially archives
1440                 # NOTE: once we have support for nested transactions, the commit may be moved
1441                 #       to after $wikiPage->doEdit has been called.
1442                 $dbw->commit( __METHOD__ );
1443
1444                 # Save to memcache.
1445                 # We shall not saveToCache before the commit since otherwise
1446                 # in case of a rollback there is an usable file from memcached
1447                 # which in fact doesn't really exist (bug 24978)
1448                 $this->saveToCache();
1449
1450                 if ( $exists ) {
1451                         # Invalidate the cache for the description page
1452                         $descTitle->invalidateCache();
1453                         $descTitle->purgeSquid();
1454                 } else {
1455                         # New file; create the description page.
1456                         # There's already a log entry, so don't make a second RC entry
1457                         # Squid and file cache for the description page are purged by doEditContent.
1458                         $content = ContentHandler::makeContent( $pageText, $descTitle );
1459                         $status = $wikiPage->doEditContent(
1460                                 $content,
1461                                 $comment,
1462                                 EDIT_NEW | EDIT_SUPPRESS_RC,
1463                                 false,
1464                                 $user
1465                         );
1466
1467                         $dbw->begin( __METHOD__ ); // XXX; doEdit() uses a transaction
1468                         // Now that the page exists, make an RC entry.
1469                         $logEntry->publish( $logId );
1470                         if ( isset( $status->value['revision'] ) ) {
1471                                 $dbw->update( 'logging',
1472                                         array( 'log_page' => $status->value['revision']->getPage() ),
1473                                         array( 'log_id' => $logId ),
1474                                         __METHOD__
1475                                 );
1476                         }
1477                         $dbw->commit( __METHOD__ ); // commit before anything bad can happen
1478                 }
1479
1480                 wfProfileOut( __METHOD__ . '-edit' );
1481
1482                 if ( $reupload ) {
1483                         # Delete old thumbnails
1484                         wfProfileIn( __METHOD__ . '-purge' );
1485                         $this->purgeThumbnails();
1486                         wfProfileOut( __METHOD__ . '-purge' );
1487
1488                         # Remove the old file from the squid cache
1489                         SquidUpdate::purge( array( $this->getURL() ) );
1490                 }
1491
1492                 # Hooks, hooks, the magic of hooks...
1493                 wfProfileIn( __METHOD__ . '-hooks' );
1494                 wfRunHooks( 'FileUpload', array( $this, $reupload, $descTitle->exists() ) );
1495                 wfProfileOut( __METHOD__ . '-hooks' );
1496
1497                 # Invalidate cache for all pages using this file
1498                 $update = new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' );
1499                 $update->doUpdate();
1500                 if ( !$reupload ) {
1501                         LinksUpdate::queueRecursiveJobsForTable( $this->getTitle(), 'imagelinks' );
1502                 }
1503
1504                 wfProfileOut( __METHOD__ );
1505
1506                 return true;
1507         }
1508
1509         /**
1510          * Move or copy a file to its public location. If a file exists at the
1511          * destination, move it to an archive. Returns a FileRepoStatus object with
1512          * the archive name in the "value" member on success.
1513          *
1514          * The archive name should be passed through to recordUpload for database
1515          * registration.
1516          *
1517          * @param string $srcPath Local filesystem path to the source image
1518          * @param int $flags A bitwise combination of:
1519          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1520          * @param array $options Optional additional parameters
1521          * @return FileRepoStatus On success, the value member contains the
1522          *     archive name, or an empty string if it was a new file.
1523          */
1524         function publish( $srcPath, $flags = 0, array $options = array() ) {
1525                 return $this->publishTo( $srcPath, $this->getRel(), $flags, $options );
1526         }
1527
1528         /**
1529          * Move or copy a file to a specified location. Returns a FileRepoStatus
1530          * object with the archive name in the "value" member on success.
1531          *
1532          * The archive name should be passed through to recordUpload for database
1533          * registration.
1534          *
1535          * @param string $srcPath Local filesystem path to the source image
1536          * @param string $dstRel Target relative path
1537          * @param int $flags A bitwise combination of:
1538          *     File::DELETE_SOURCE    Delete the source file, i.e. move rather than copy
1539          * @param array $options Optional additional parameters
1540          * @return FileRepoStatus On success, the value member contains the
1541          *     archive name, or an empty string if it was a new file.
1542          */
1543         function publishTo( $srcPath, $dstRel, $flags = 0, array $options = array() ) {
1544                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1545                         return $this->readOnlyFatalStatus();
1546                 }
1547
1548                 $this->lock(); // begin
1549
1550                 $archiveName = wfTimestamp( TS_MW ) . '!' . $this->getName();
1551                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
1552                 $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
1553                 $status = $this->repo->publish( $srcPath, $dstRel, $archiveRel, $flags, $options );
1554
1555                 if ( $status->value == 'new' ) {
1556                         $status->value = '';
1557                 } else {
1558                         $status->value = $archiveName;
1559                 }
1560
1561                 $this->unlock(); // done
1562
1563                 return $status;
1564         }
1565
1566         /** getLinksTo inherited */
1567         /** getExifData inherited */
1568         /** isLocal inherited */
1569         /** wasDeleted inherited */
1570
1571         /**
1572          * Move file to the new title
1573          *
1574          * Move current, old version and all thumbnails
1575          * to the new filename. Old file is deleted.
1576          *
1577          * Cache purging is done; checks for validity
1578          * and logging are caller's responsibility
1579          *
1580          * @param Title $target New file name
1581          * @return FileRepoStatus
1582          */
1583         function move( $target ) {
1584                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1585                         return $this->readOnlyFatalStatus();
1586                 }
1587
1588                 wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
1589                 $batch = new LocalFileMoveBatch( $this, $target );
1590
1591                 $this->lock(); // begin
1592                 $batch->addCurrent();
1593                 $archiveNames = $batch->addOlds();
1594                 $status = $batch->execute();
1595                 $this->unlock(); // done
1596
1597                 wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
1598
1599                 // Purge the source and target files...
1600                 $oldTitleFile = wfLocalFile( $this->title );
1601                 $newTitleFile = wfLocalFile( $target );
1602                 // Hack: the lock()/unlock() pair is nested in a transaction so the locking is not
1603                 // tied to BEGIN/COMMIT. To avoid slow purges in the transaction, move them outside.
1604                 $this->getRepo()->getMasterDB()->onTransactionIdle(
1605                         function () use ( $oldTitleFile, $newTitleFile, $archiveNames ) {
1606                                 $oldTitleFile->purgeEverything();
1607                                 foreach ( $archiveNames as $archiveName ) {
1608                                         $oldTitleFile->purgeOldThumbnails( $archiveName );
1609                                 }
1610                                 $newTitleFile->purgeEverything();
1611                         }
1612                 );
1613
1614                 if ( $status->isOK() ) {
1615                         // Now switch the object
1616                         $this->title = $target;
1617                         // Force regeneration of the name and hashpath
1618                         unset( $this->name );
1619                         unset( $this->hashPath );
1620                 }
1621
1622                 return $status;
1623         }
1624
1625         /**
1626          * Delete all versions of the file.
1627          *
1628          * Moves the files into an archive directory (or deletes them)
1629          * and removes the database rows.
1630          *
1631          * Cache purging is done; logging is caller's responsibility.
1632          *
1633          * @param string $reason
1634          * @param bool $suppress
1635          * @return FileRepoStatus
1636          */
1637         function delete( $reason, $suppress = false ) {
1638                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1639                         return $this->readOnlyFatalStatus();
1640                 }
1641
1642                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1643
1644                 $this->lock(); // begin
1645                 $batch->addCurrent();
1646                 # Get old version relative paths
1647                 $archiveNames = $batch->addOlds();
1648                 $status = $batch->execute();
1649                 $this->unlock(); // done
1650
1651                 if ( $status->isOK() ) {
1652                         DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => -1 ) ) );
1653                 }
1654
1655                 // Hack: the lock()/unlock() pair is nested in a transaction so the locking is not
1656                 // tied to BEGIN/COMMIT. To avoid slow purges in the transaction, move them outside.
1657                 $file = $this;
1658                 $this->getRepo()->getMasterDB()->onTransactionIdle(
1659                         function () use ( $file, $archiveNames ) {
1660                                 global $wgUseSquid;
1661
1662                                 $file->purgeEverything();
1663                                 foreach ( $archiveNames as $archiveName ) {
1664                                         $file->purgeOldThumbnails( $archiveName );
1665                                 }
1666
1667                                 if ( $wgUseSquid ) {
1668                                         // Purge the squid
1669                                         $purgeUrls = array();
1670                                         foreach ( $archiveNames as $archiveName ) {
1671                                                 $purgeUrls[] = $file->getArchiveUrl( $archiveName );
1672                                         }
1673                                         SquidUpdate::purge( $purgeUrls );
1674                                 }
1675                         }
1676                 );
1677
1678                 return $status;
1679         }
1680
1681         /**
1682          * Delete an old version of the file.
1683          *
1684          * Moves the file into an archive directory (or deletes it)
1685          * and removes the database row.
1686          *
1687          * Cache purging is done; logging is caller's responsibility.
1688          *
1689          * @param string $archiveName
1690          * @param string $reason
1691          * @param bool $suppress
1692          * @throws MWException Exception on database or file store failure
1693          * @return FileRepoStatus
1694          */
1695         function deleteOld( $archiveName, $reason, $suppress = false ) {
1696                 global $wgUseSquid;
1697                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1698                         return $this->readOnlyFatalStatus();
1699                 }
1700
1701                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1702
1703                 $this->lock(); // begin
1704                 $batch->addOld( $archiveName );
1705                 $status = $batch->execute();
1706                 $this->unlock(); // done
1707
1708                 $this->purgeOldThumbnails( $archiveName );
1709                 if ( $status->isOK() ) {
1710                         $this->purgeDescription();
1711                         $this->purgeHistory();
1712                 }
1713
1714                 if ( $wgUseSquid ) {
1715                         // Purge the squid
1716                         SquidUpdate::purge( array( $this->getArchiveUrl( $archiveName ) ) );
1717                 }
1718
1719                 return $status;
1720         }
1721
1722         /**
1723          * Restore all or specified deleted revisions to the given file.
1724          * Permissions and logging are left to the caller.
1725          *
1726          * May throw database exceptions on error.
1727          *
1728          * @param array $versions Set of record ids of deleted items to restore,
1729          *   or empty to restore all revisions.
1730          * @param bool $unsuppress
1731          * @return FileRepoStatus
1732          */
1733         function restore( $versions = array(), $unsuppress = false ) {
1734                 if ( $this->getRepo()->getReadOnlyReason() !== false ) {
1735                         return $this->readOnlyFatalStatus();
1736                 }
1737
1738                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1739
1740                 $this->lock(); // begin
1741                 if ( !$versions ) {
1742                         $batch->addAll();
1743                 } else {
1744                         $batch->addIds( $versions );
1745                 }
1746                 $status = $batch->execute();
1747                 if ( $status->isGood() ) {
1748                         $cleanupStatus = $batch->cleanup();
1749                         $cleanupStatus->successCount = 0;
1750                         $cleanupStatus->failCount = 0;
1751                         $status->merge( $cleanupStatus );
1752                 }
1753                 $this->unlock(); // done
1754
1755                 return $status;
1756         }
1757
1758         /** isMultipage inherited */
1759         /** pageCount inherited */
1760         /** scaleHeight inherited */
1761         /** getImageSize inherited */
1762
1763         /**
1764          * Get the URL of the file description page.
1765          * @return string
1766          */
1767         function getDescriptionUrl() {
1768                 return $this->title->getLocalURL();
1769         }
1770
1771         /**
1772          * Get the HTML text of the description page
1773          * This is not used by ImagePage for local files, since (among other things)
1774          * it skips the parser cache.
1775          *
1776          * @param Language $lang What language to get description in (Optional)
1777          * @return bool|mixed
1778          */
1779         function getDescriptionText( $lang = null ) {
1780                 $revision = Revision::newFromTitle( $this->title, false, Revision::READ_NORMAL );
1781                 if ( !$revision ) {
1782                         return false;
1783                 }
1784                 $content = $revision->getContent();
1785                 if ( !$content ) {
1786                         return false;
1787                 }
1788                 $pout = $content->getParserOutput( $this->title, null, new ParserOptions( null, $lang ) );
1789
1790                 return $pout->getText();
1791         }
1792
1793         /**
1794          * @param int $audience
1795          * @param User $user
1796          * @return string
1797          */
1798         function getDescription( $audience = self::FOR_PUBLIC, User $user = null ) {
1799                 $this->load();
1800                 if ( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
1801                         return '';
1802                 } elseif ( $audience == self::FOR_THIS_USER
1803                         && !$this->userCan( self::DELETED_COMMENT, $user )
1804                 ) {
1805                         return '';
1806                 } else {
1807                         return $this->description;
1808                 }
1809         }
1810
1811         /**
1812          * @return bool|string
1813          */
1814         function getTimestamp() {
1815                 $this->load();
1816
1817                 return $this->timestamp;
1818         }
1819
1820         /**
1821          * @return string
1822          */
1823         function getSha1() {
1824                 $this->load();
1825                 // Initialise now if necessary
1826                 if ( $this->sha1 == '' && $this->fileExists ) {
1827                         $this->lock(); // begin
1828
1829                         $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
1830                         if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
1831                                 $dbw = $this->repo->getMasterDB();
1832                                 $dbw->update( 'image',
1833                                         array( 'img_sha1' => $this->sha1 ),
1834                                         array( 'img_name' => $this->getName() ),
1835                                         __METHOD__ );
1836                                 $this->saveToCache();
1837                         }
1838
1839                         $this->unlock(); // done
1840                 }
1841
1842                 return $this->sha1;
1843         }
1844
1845         /**
1846          * @return bool Whether to cache in RepoGroup (this avoids OOMs)
1847          */
1848         function isCacheable() {
1849                 $this->load();
1850
1851                 // If extra data (metadata) was not loaded then it must have been large
1852                 return $this->extraDataLoaded
1853                 && strlen( serialize( $this->metadata ) ) <= self::CACHE_FIELD_MAX_LEN;
1854         }
1855
1856         /**
1857          * Start a transaction and lock the image for update
1858          * Increments a reference counter if the lock is already held
1859          * @throws MWException
1860          * @return bool True if the image exists, false otherwise
1861          */
1862         function lock() {
1863                 $dbw = $this->repo->getMasterDB();
1864
1865                 if ( !$this->locked ) {
1866                         if ( !$dbw->trxLevel() ) {
1867                                 $dbw->begin( __METHOD__ );
1868                                 $this->lockedOwnTrx = true;
1869                         }
1870                         $this->locked++;
1871                         // Bug 54736: use simple lock to handle when the file does not exist.
1872                         // SELECT FOR UPDATE only locks records not the gaps where there are none.
1873                         $cache = wfGetMainCache();
1874                         $key = $this->getCacheKey();
1875                         if ( !$cache->lock( $key, 5 ) ) {
1876                                 throw new MWException( "Could not acquire lock for '{$this->getName()}.'" );
1877                         }
1878                         $dbw->onTransactionIdle( function () use ( $cache, $key ) {
1879                                 $cache->unlock( $key ); // release on commit
1880                         } );
1881                 }
1882
1883                 $this->markVolatile(); // file may change soon
1884
1885                 return $dbw->selectField( 'image', '1',
1886                         array( 'img_name' => $this->getName() ), __METHOD__, array( 'FOR UPDATE' ) );
1887         }
1888
1889         /**
1890          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1891          * the transaction and thereby releases the image lock.
1892          */
1893         function unlock() {
1894                 if ( $this->locked ) {
1895                         --$this->locked;
1896                         if ( !$this->locked && $this->lockedOwnTrx ) {
1897                                 $dbw = $this->repo->getMasterDB();
1898                                 $dbw->commit( __METHOD__ );
1899                                 $this->lockedOwnTrx = false;
1900                         }
1901                 }
1902         }
1903
1904         /**
1905          * Mark a file as about to be changed
1906          *
1907          * This sets a cache key that alters master/slave DB loading behavior
1908          *
1909          * @return bool Success
1910          */
1911         protected function markVolatile() {
1912                 global $wgMemc;
1913
1914                 $key = $this->repo->getSharedCacheKey( 'file-volatile', md5( $this->getName() ) );
1915                 if ( $key ) {
1916                         $this->lastMarkedVolatile = time();
1917                         return $wgMemc->set( $key, $this->lastMarkedVolatile, self::VOLATILE_TTL );
1918                 }
1919
1920                 return true;
1921         }
1922
1923         /**
1924          * Check if a file is about to be changed or has been changed recently
1925          *
1926          * @see LocalFile::isVolatile()
1927          * @return bool Whether the file is volatile
1928          */
1929         protected function isVolatile() {
1930                 global $wgMemc;
1931
1932                 $key = $this->repo->getSharedCacheKey( 'file-volatile', md5( $this->getName() ) );
1933                 if ( !$key ) {
1934                         // repo unavailable; bail.
1935                         return false;
1936                 }
1937
1938                 if ( $this->lastMarkedVolatile === 0 ) {
1939                         $this->lastMarkedVolatile = $wgMemc->get( $key ) ?: 0;
1940                 }
1941
1942                 $volatileDuration = time() - $this->lastMarkedVolatile;
1943                 return $volatileDuration <= self::VOLATILE_TTL;
1944         }
1945
1946         /**
1947          * Roll back the DB transaction and mark the image unlocked
1948          */
1949         function unlockAndRollback() {
1950                 $this->locked = false;
1951                 $dbw = $this->repo->getMasterDB();
1952                 $dbw->rollback( __METHOD__ );
1953                 $this->lockedOwnTrx = false;
1954         }
1955
1956         /**
1957          * @return Status
1958          */
1959         protected function readOnlyFatalStatus() {
1960                 return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
1961                         $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
1962         }
1963
1964         /**
1965          * Clean up any dangling locks
1966          */
1967         function __destruct() {
1968                 $this->unlock();
1969         }
1970 } // LocalFile class
1971
1972 # ------------------------------------------------------------------------------
1973
1974 /**
1975  * Helper class for file deletion
1976  * @ingroup FileAbstraction
1977  */
1978 class LocalFileDeleteBatch {
1979         /** @var LocalFile */
1980         private $file;
1981
1982         /** @var string */
1983         private $reason;
1984
1985         /** @var array */
1986         private $srcRels = array();
1987
1988         /** @var array */
1989         private $archiveUrls = array();
1990
1991         /** @var array Items to be processed in the deletion batch */
1992         private $deletionBatch;
1993
1994         /** @var bool Wether to suppress all suppressable fields when deleting */
1995         private $suppress;
1996
1997         /** @var FileRepoStatus */
1998         private $status;
1999
2000         /**
2001          * @param File $file
2002          * @param string $reason
2003          * @param bool $suppress
2004          */
2005         function __construct( File $file, $reason = '', $suppress = false ) {
2006                 $this->file = $file;
2007                 $this->reason = $reason;
2008                 $this->suppress = $suppress;
2009                 $this->status = $file->repo->newGood();
2010         }
2011
2012         function addCurrent() {
2013                 $this->srcRels['.'] = $this->file->getRel();
2014         }
2015
2016         /**
2017          * @param string $oldName
2018          */
2019         function addOld( $oldName ) {
2020                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
2021                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
2022         }
2023
2024         /**
2025          * Add the old versions of the image to the batch
2026          * @return array List of archive names from old versions
2027          */
2028         function addOlds() {
2029                 $archiveNames = array();
2030
2031                 $dbw = $this->file->repo->getMasterDB();
2032                 $result = $dbw->select( 'oldimage',
2033                         array( 'oi_archive_name' ),
2034                         array( 'oi_name' => $this->file->getName() ),
2035                         __METHOD__
2036                 );
2037
2038                 foreach ( $result as $row ) {
2039                         $this->addOld( $row->oi_archive_name );
2040                         $archiveNames[] = $row->oi_archive_name;
2041                 }
2042
2043                 return $archiveNames;
2044         }
2045
2046         /**
2047          * @return array
2048          */
2049         function getOldRels() {
2050                 if ( !isset( $this->srcRels['.'] ) ) {
2051                         $oldRels =& $this->srcRels;
2052                         $deleteCurrent = false;
2053                 } else {
2054                         $oldRels = $this->srcRels;
2055                         unset( $oldRels['.'] );
2056                         $deleteCurrent = true;
2057                 }
2058
2059                 return array( $oldRels, $deleteCurrent );
2060         }
2061
2062         /**
2063          * @return array
2064          */
2065         protected function getHashes() {
2066                 $hashes = array();
2067                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2068
2069                 if ( $deleteCurrent ) {
2070                         $hashes['.'] = $this->file->getSha1();
2071                 }
2072
2073                 if ( count( $oldRels ) ) {
2074                         $dbw = $this->file->repo->getMasterDB();
2075                         $res = $dbw->select(
2076                                 'oldimage',
2077                                 array( 'oi_archive_name', 'oi_sha1' ),
2078                                 array( 'oi_archive_name' => array_keys( $oldRels ),
2079                                         'oi_name' => $this->file->getName() ), // performance
2080                                 __METHOD__
2081                         );
2082
2083                         foreach ( $res as $row ) {
2084                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
2085                                         // Get the hash from the file
2086                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
2087                                         $props = $this->file->repo->getFileProps( $oldUrl );
2088
2089                                         if ( $props['fileExists'] ) {
2090                                                 // Upgrade the oldimage row
2091                                                 $dbw->update( 'oldimage',
2092                                                         array( 'oi_sha1' => $props['sha1'] ),
2093                                                         array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ),
2094                                                         __METHOD__ );
2095                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
2096                                         } else {
2097                                                 $hashes[$row->oi_archive_name] = false;
2098                                         }
2099                                 } else {
2100                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
2101                                 }
2102                         }
2103                 }
2104
2105                 $missing = array_diff_key( $this->srcRels, $hashes );
2106
2107                 foreach ( $missing as $name => $rel ) {
2108                         $this->status->error( 'filedelete-old-unregistered', $name );
2109                 }
2110
2111                 foreach ( $hashes as $name => $hash ) {
2112                         if ( !$hash ) {
2113                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
2114                                 unset( $hashes[$name] );
2115                         }
2116                 }
2117
2118                 return $hashes;
2119         }
2120
2121         function doDBInserts() {
2122                 global $wgUser;
2123
2124                 $dbw = $this->file->repo->getMasterDB();
2125                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
2126                 $encUserId = $dbw->addQuotes( $wgUser->getId() );
2127                 $encReason = $dbw->addQuotes( $this->reason );
2128                 $encGroup = $dbw->addQuotes( 'deleted' );
2129                 $ext = $this->file->getExtension();
2130                 $dotExt = $ext === '' ? '' : ".$ext";
2131                 $encExt = $dbw->addQuotes( $dotExt );
2132                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2133
2134                 // Bitfields to further suppress the content
2135                 if ( $this->suppress ) {
2136                         $bitfield = 0;
2137                         // This should be 15...
2138                         $bitfield |= Revision::DELETED_TEXT;
2139                         $bitfield |= Revision::DELETED_COMMENT;
2140                         $bitfield |= Revision::DELETED_USER;
2141                         $bitfield |= Revision::DELETED_RESTRICTED;
2142                 } else {
2143                         $bitfield = 'oi_deleted';
2144                 }
2145
2146                 if ( $deleteCurrent ) {
2147                         $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) );
2148                         $where = array( 'img_name' => $this->file->getName() );
2149                         $dbw->insertSelect( 'filearchive', 'image',
2150                                 array(
2151                                         'fa_storage_group' => $encGroup,
2152                                         'fa_storage_key' => "CASE WHEN img_sha1='' THEN '' ELSE $concat END",
2153                                         'fa_deleted_user' => $encUserId,
2154                                         'fa_deleted_timestamp' => $encTimestamp,
2155                                         'fa_deleted_reason' => $encReason,
2156                                         'fa_deleted' => $this->suppress ? $bitfield : 0,
2157
2158                                         'fa_name' => 'img_name',
2159                                         'fa_archive_name' => 'NULL',
2160                                         'fa_size' => 'img_size',
2161                                         'fa_width' => 'img_width',
2162                                         'fa_height' => 'img_height',
2163                                         'fa_metadata' => 'img_metadata',
2164                                         'fa_bits' => 'img_bits',
2165                                         'fa_media_type' => 'img_media_type',
2166                                         'fa_major_mime' => 'img_major_mime',
2167                                         'fa_minor_mime' => 'img_minor_mime',
2168                                         'fa_description' => 'img_description',
2169                                         'fa_user' => 'img_user',
2170                                         'fa_user_text' => 'img_user_text',
2171                                         'fa_timestamp' => 'img_timestamp',
2172                                         'fa_sha1' => 'img_sha1',
2173                                 ), $where, __METHOD__ );
2174                 }
2175
2176                 if ( count( $oldRels ) ) {
2177                         $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) );
2178                         $where = array(
2179                                 'oi_name' => $this->file->getName(),
2180                                 'oi_archive_name' => array_keys( $oldRels ) );
2181                         $dbw->insertSelect( 'filearchive', 'oldimage',
2182                                 array(
2183                                         'fa_storage_group' => $encGroup,
2184                                         'fa_storage_key' => "CASE WHEN oi_sha1='' THEN '' ELSE $concat END",
2185                                         'fa_deleted_user' => $encUserId,
2186                                         'fa_deleted_timestamp' => $encTimestamp,
2187                                         'fa_deleted_reason' => $encReason,
2188                                         'fa_deleted' => $this->suppress ? $bitfield : 'oi_deleted',
2189
2190                                         'fa_name' => 'oi_name',
2191                                         'fa_archive_name' => 'oi_archive_name',
2192                                         'fa_size' => 'oi_size',
2193                                         'fa_width' => 'oi_width',
2194                                         'fa_height' => 'oi_height',
2195                                         'fa_metadata' => 'oi_metadata',
2196                                         'fa_bits' => 'oi_bits',
2197                                         'fa_media_type' => 'oi_media_type',
2198                                         'fa_major_mime' => 'oi_major_mime',
2199                                         'fa_minor_mime' => 'oi_minor_mime',
2200                                         'fa_description' => 'oi_description',
2201                                         'fa_user' => 'oi_user',
2202                                         'fa_user_text' => 'oi_user_text',
2203                                         'fa_timestamp' => 'oi_timestamp',
2204                                         'fa_sha1' => 'oi_sha1',
2205                                 ), $where, __METHOD__ );
2206                 }
2207         }
2208
2209         function doDBDeletes() {
2210                 $dbw = $this->file->repo->getMasterDB();
2211                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
2212
2213                 if ( count( $oldRels ) ) {
2214                         $dbw->delete( 'oldimage',
2215                                 array(
2216                                         'oi_name' => $this->file->getName(),
2217                                         'oi_archive_name' => array_keys( $oldRels )
2218                                 ), __METHOD__ );
2219                 }
2220
2221                 if ( $deleteCurrent ) {
2222                         $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ );
2223                 }
2224         }
2225
2226         /**
2227          * Run the transaction
2228          * @return FileRepoStatus
2229          */
2230         function execute() {
2231                 wfProfileIn( __METHOD__ );
2232
2233                 $this->file->lock();
2234                 // Leave private files alone
2235                 $privateFiles = array();
2236                 list( $oldRels, ) = $this->getOldRels();
2237                 $dbw = $this->file->repo->getMasterDB();
2238
2239                 if ( !empty( $oldRels ) ) {
2240                         $res = $dbw->select( 'oldimage',
2241                                 array( 'oi_archive_name' ),
2242                                 array( 'oi_name' => $this->file->getName(),
2243                                         'oi_archive_name' => array_keys( $oldRels ),
2244                                         $dbw->bitAnd( 'oi_deleted', File::DELETED_FILE ) => File::DELETED_FILE ),
2245                                 __METHOD__ );
2246
2247                         foreach ( $res as $row ) {
2248                                 $privateFiles[$row->oi_archive_name] = 1;
2249                         }
2250                 }
2251                 // Prepare deletion batch
2252                 $hashes = $this->getHashes();
2253                 $this->deletionBatch = array();
2254                 $ext = $this->file->getExtension();
2255                 $dotExt = $ext === '' ? '' : ".$ext";
2256
2257                 foreach ( $this->srcRels as $name => $srcRel ) {
2258                         // Skip files that have no hash (missing source).
2259                         // Keep private files where they are.
2260                         if ( isset( $hashes[$name] ) && !array_key_exists( $name, $privateFiles ) ) {
2261                                 $hash = $hashes[$name];
2262                                 $key = $hash . $dotExt;
2263                                 $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
2264                                 $this->deletionBatch[$name] = array( $srcRel, $dstRel );
2265                         }
2266                 }
2267
2268                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
2269                 // We acquire this lock by running the inserts now, before the file operations.
2270                 //
2271                 // This potentially has poor lock contention characteristics -- an alternative
2272                 // scheme would be to insert stub filearchive entries with no fa_name and commit
2273                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
2274                 $this->doDBInserts();
2275
2276                 // Removes non-existent file from the batch, so we don't get errors.
2277                 $this->deletionBatch = $this->removeNonexistentFiles( $this->deletionBatch );
2278
2279                 // Execute the file deletion batch
2280                 $status = $this->file->repo->deleteBatch( $this->deletionBatch );
2281
2282                 if ( !$status->isGood() ) {
2283                         $this->status->merge( $status );
2284                 }
2285
2286                 if ( !$this->status->isOK() ) {
2287                         // Critical file deletion error
2288                         // Roll back inserts, release lock and abort
2289                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
2290                         $this->file->unlockAndRollback();
2291                         wfProfileOut( __METHOD__ );
2292
2293                         return $this->status;
2294                 }
2295
2296                 // Delete image/oldimage rows
2297                 $this->doDBDeletes();
2298
2299                 // Commit and return
2300                 $this->file->unlock();
2301                 wfProfileOut( __METHOD__ );
2302
2303                 return $this->status;
2304         }
2305
2306         /**
2307          * Removes non-existent files from a deletion batch.
2308          * @param array $batch
2309          * @return array
2310          */
2311         function removeNonexistentFiles( $batch ) {
2312                 $files = $newBatch = array();
2313
2314                 foreach ( $batch as $batchItem ) {
2315                         list( $src, ) = $batchItem;
2316                         $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src );
2317                 }
2318
2319                 $result = $this->file->repo->fileExistsBatch( $files );
2320
2321                 foreach ( $batch as $batchItem ) {
2322                         if ( $result[$batchItem[0]] ) {
2323                                 $newBatch[] = $batchItem;
2324                         }
2325                 }
2326
2327                 return $newBatch;
2328         }
2329 }
2330
2331 # ------------------------------------------------------------------------------
2332
2333 /**
2334  * Helper class for file undeletion
2335  * @ingroup FileAbstraction
2336  */
2337 class LocalFileRestoreBatch {
2338         /** @var LocalFile */
2339         private $file;
2340
2341         /** @var array List of file IDs to restore */
2342         private $cleanupBatch;
2343
2344         /** @var array List of file IDs to restore */
2345         private $ids;
2346
2347         /** @var bool Add all revisions of the file */
2348         private $all;
2349
2350         /** @var bool Wether to remove all settings for suppressed fields */
2351         private $unsuppress = false;
2352
2353         /**
2354          * @param File $file
2355          * @param bool $unsuppress
2356          */
2357         function __construct( File $file, $unsuppress = false ) {
2358                 $this->file = $file;
2359                 $this->cleanupBatch = $this->ids = array();
2360                 $this->ids = array();
2361                 $this->unsuppress = $unsuppress;
2362         }
2363
2364         /**
2365          * Add a file by ID
2366          */
2367         function addId( $fa_id ) {
2368                 $this->ids[] = $fa_id;
2369         }
2370
2371         /**
2372          * Add a whole lot of files by ID
2373          */
2374         function addIds( $ids ) {
2375                 $this->ids = array_merge( $this->ids, $ids );
2376         }
2377
2378         /**
2379          * Add all revisions of the file
2380          */
2381         function addAll() {
2382                 $this->all = true;
2383         }
2384
2385         /**
2386          * Run the transaction, except the cleanup batch.
2387          * The cleanup batch should be run in a separate transaction, because it locks different
2388          * rows and there's no need to keep the image row locked while it's acquiring those locks
2389          * The caller may have its own transaction open.
2390          * So we save the batch and let the caller call cleanup()
2391          * @return FileRepoStatus
2392          */
2393         function execute() {
2394                 global $wgLang;
2395
2396                 if ( !$this->all && !$this->ids ) {
2397                         // Do nothing
2398                         return $this->file->repo->newGood();
2399                 }
2400
2401                 $exists = $this->file->lock();
2402                 $dbw = $this->file->repo->getMasterDB();
2403                 $status = $this->file->repo->newGood();
2404
2405                 // Fetch all or selected archived revisions for the file,
2406                 // sorted from the most recent to the oldest.
2407                 $conditions = array( 'fa_name' => $this->file->getName() );
2408
2409                 if ( !$this->all ) {
2410                         $conditions['fa_id'] = $this->ids;
2411                 }
2412
2413                 $result = $dbw->select(
2414                         'filearchive',
2415                         ArchivedFile::selectFields(),
2416                         $conditions,
2417                         __METHOD__,
2418                         array( 'ORDER BY' => 'fa_timestamp DESC' )
2419                 );
2420
2421                 $idsPresent = array();
2422                 $storeBatch = array();
2423                 $insertBatch = array();
2424                 $insertCurrent = false;
2425                 $deleteIds = array();
2426                 $first = true;
2427                 $archiveNames = array();
2428
2429                 foreach ( $result as $row ) {
2430                         $idsPresent[] = $row->fa_id;
2431
2432                         if ( $row->fa_name != $this->file->getName() ) {
2433                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
2434                                 $status->failCount++;
2435                                 continue;
2436                         }
2437
2438                         if ( $row->fa_storage_key == '' ) {
2439                                 // Revision was missing pre-deletion
2440                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
2441                                 $status->failCount++;
2442                                 continue;
2443                         }
2444
2445                         $deletedRel = $this->file->repo->getDeletedHashPath( $row->fa_storage_key ) .
2446                                 $row->fa_storage_key;
2447                         $deletedUrl = $this->file->repo->getVirtualUrl() . '/deleted/' . $deletedRel;
2448
2449                         if ( isset( $row->fa_sha1 ) ) {
2450                                 $sha1 = $row->fa_sha1;
2451                         } else {
2452                                 // old row, populate from key
2453                                 $sha1 = LocalRepo::getHashFromKey( $row->fa_storage_key );
2454                         }
2455
2456                         # Fix leading zero
2457                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
2458                                 $sha1 = substr( $sha1, 1 );
2459                         }
2460
2461                         if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
2462                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
2463                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
2464                                 || is_null( $row->fa_metadata )
2465                         ) {
2466                                 // Refresh our metadata
2467                                 // Required for a new current revision; nice for older ones too. :)
2468                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
2469                         } else {
2470                                 $props = array(
2471                                         'minor_mime' => $row->fa_minor_mime,
2472                                         'major_mime' => $row->fa_major_mime,
2473                                         'media_type' => $row->fa_media_type,
2474                                         'metadata' => $row->fa_metadata
2475                                 );
2476                         }
2477
2478                         if ( $first && !$exists ) {
2479                                 // This revision will be published as the new current version
2480                                 $destRel = $this->file->getRel();
2481                                 $insertCurrent = array(
2482                                         'img_name' => $row->fa_name,
2483                                         'img_size' => $row->fa_size,
2484                                         'img_width' => $row->fa_width,
2485                                         'img_height' => $row->fa_height,
2486                                         'img_metadata' => $props['metadata'],
2487                                         'img_bits' => $row->fa_bits,
2488                                         'img_media_type' => $props['media_type'],
2489                                         'img_major_mime' => $props['major_mime'],
2490                                         'img_minor_mime' => $props['minor_mime'],
2491                                         'img_description' => $row->fa_description,
2492                                         'img_user' => $row->fa_user,
2493                                         'img_user_text' => $row->fa_user_text,
2494                                         'img_timestamp' => $row->fa_timestamp,
2495                                         'img_sha1' => $sha1
2496                                 );
2497
2498                                 // The live (current) version cannot be hidden!
2499                                 if ( !$this->unsuppress && $row->fa_deleted ) {
2500                                         $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2501                                         $this->cleanupBatch[] = $row->fa_storage_key;
2502                                 }
2503                         } else {
2504                                 $archiveName = $row->fa_archive_name;
2505
2506                                 if ( $archiveName == '' ) {
2507                                         // This was originally a current version; we
2508                                         // have to devise a new archive name for it.
2509                                         // Format is <timestamp of archiving>!<name>
2510                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
2511
2512                                         do {
2513                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
2514                                                 $timestamp++;
2515                                         } while ( isset( $archiveNames[$archiveName] ) );
2516                                 }
2517
2518                                 $archiveNames[$archiveName] = true;
2519                                 $destRel = $this->file->getArchiveRel( $archiveName );
2520                                 $insertBatch[] = array(
2521                                         'oi_name' => $row->fa_name,
2522                                         'oi_archive_name' => $archiveName,
2523                                         'oi_size' => $row->fa_size,
2524                                         'oi_width' => $row->fa_width,
2525                                         'oi_height' => $row->fa_height,
2526                                         'oi_bits' => $row->fa_bits,
2527                                         'oi_description' => $row->fa_description,
2528                                         'oi_user' => $row->fa_user,
2529                                         'oi_user_text' => $row->fa_user_text,
2530                                         'oi_timestamp' => $row->fa_timestamp,
2531                                         'oi_metadata' => $props['metadata'],
2532                                         'oi_media_type' => $props['media_type'],
2533                                         'oi_major_mime' => $props['major_mime'],
2534                                         'oi_minor_mime' => $props['minor_mime'],
2535                                         'oi_deleted' => $this->unsuppress ? 0 : $row->fa_deleted,
2536                                         'oi_sha1' => $sha1 );
2537                         }
2538
2539                         $deleteIds[] = $row->fa_id;
2540
2541                         if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
2542                                 // private files can stay where they are
2543                                 $status->successCount++;
2544                         } else {
2545                                 $storeBatch[] = array( $deletedUrl, 'public', $destRel );
2546                                 $this->cleanupBatch[] = $row->fa_storage_key;
2547                         }
2548
2549                         $first = false;
2550                 }
2551
2552                 unset( $result );
2553
2554                 // Add a warning to the status object for missing IDs
2555                 $missingIds = array_diff( $this->ids, $idsPresent );
2556
2557                 foreach ( $missingIds as $id ) {
2558                         $status->error( 'undelete-missing-filearchive', $id );
2559                 }
2560
2561                 // Remove missing files from batch, so we don't get errors when undeleting them
2562                 $storeBatch = $this->removeNonexistentFiles( $storeBatch );
2563
2564                 // Run the store batch
2565                 // Use the OVERWRITE_SAME flag to smooth over a common error
2566                 $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
2567                 $status->merge( $storeStatus );
2568
2569                 if ( !$status->isGood() ) {
2570                         // Even if some files could be copied, fail entirely as that is the
2571                         // easiest thing to do without data loss
2572                         $this->cleanupFailedBatch( $storeStatus, $storeBatch );
2573                         $status->ok = false;
2574                         $this->file->unlock();
2575
2576                         return $status;
2577                 }
2578
2579                 // Run the DB updates
2580                 // Because we have locked the image row, key conflicts should be rare.
2581                 // If they do occur, we can roll back the transaction at this time with
2582                 // no data loss, but leaving unregistered files scattered throughout the
2583                 // public zone.
2584                 // This is not ideal, which is why it's important to lock the image row.
2585                 if ( $insertCurrent ) {
2586                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
2587                 }
2588
2589                 if ( $insertBatch ) {
2590                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
2591                 }
2592
2593                 if ( $deleteIds ) {
2594                         $dbw->delete( 'filearchive',
2595                                 array( 'fa_id' => $deleteIds ),
2596                                 __METHOD__ );
2597                 }
2598
2599                 // If store batch is empty (all files are missing), deletion is to be considered successful
2600                 if ( $status->successCount > 0 || !$storeBatch ) {
2601                         if ( !$exists ) {
2602                                 wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" );
2603
2604                                 DeferredUpdates::addUpdate( SiteStatsUpdate::factory( array( 'images' => 1 ) ) );
2605
2606                                 $this->file->purgeEverything();
2607                         } else {
2608                                 wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" );
2609                                 $this->file->purgeDescription();
2610                                 $this->file->purgeHistory();
2611                         }
2612                 }
2613
2614                 $this->file->unlock();
2615
2616                 return $status;
2617         }
2618
2619         /**
2620          * Removes non-existent files from a store batch.
2621          * @param array $triplets
2622          * @return array
2623          */
2624         function removeNonexistentFiles( $triplets ) {
2625                 $files = $filteredTriplets = array();
2626                 foreach ( $triplets as $file ) {
2627                         $files[$file[0]] = $file[0];
2628                 }
2629
2630                 $result = $this->file->repo->fileExistsBatch( $files );
2631
2632                 foreach ( $triplets as $file ) {
2633                         if ( $result[$file[0]] ) {
2634                                 $filteredTriplets[] = $file;
2635                         }
2636                 }
2637
2638                 return $filteredTriplets;
2639         }
2640
2641         /**
2642          * Removes non-existent files from a cleanup batch.
2643          * @param array $batch
2644          * @return array
2645          */
2646         function removeNonexistentFromCleanup( $batch ) {
2647                 $files = $newBatch = array();
2648                 $repo = $this->file->repo;
2649
2650                 foreach ( $batch as $file ) {
2651                         $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' .
2652                                 rawurlencode( $repo->getDeletedHashPath( $file ) . $file );
2653                 }
2654
2655                 $result = $repo->fileExistsBatch( $files );
2656
2657                 foreach ( $batch as $file ) {
2658                         if ( $result[$file] ) {
2659                                 $newBatch[] = $file;
2660                         }
2661                 }
2662
2663                 return $newBatch;
2664         }
2665
2666         /**
2667          * Delete unused files in the deleted zone.
2668          * This should be called from outside the transaction in which execute() was called.
2669          * @return FileRepoStatus
2670          */
2671         function cleanup() {
2672                 if ( !$this->cleanupBatch ) {
2673                         return $this->file->repo->newGood();
2674                 }
2675
2676                 $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch );
2677
2678                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
2679
2680                 return $status;
2681         }
2682
2683         /**
2684          * Cleanup a failed batch. The batch was only partially successful, so
2685          * rollback by removing all items that were succesfully copied.
2686          *
2687          * @param Status $storeStatus
2688          * @param array $storeBatch
2689          */
2690         function cleanupFailedBatch( $storeStatus, $storeBatch ) {
2691                 $cleanupBatch = array();
2692
2693                 foreach ( $storeStatus->success as $i => $success ) {
2694                         // Check if this item of the batch was successfully copied
2695                         if ( $success ) {
2696                                 // Item was successfully copied and needs to be removed again
2697                                 // Extract ($dstZone, $dstRel) from the batch
2698                                 $cleanupBatch[] = array( $storeBatch[$i][1], $storeBatch[$i][2] );
2699                         }
2700                 }
2701                 $this->file->repo->cleanupBatch( $cleanupBatch );
2702         }
2703 }
2704
2705 # ------------------------------------------------------------------------------
2706
2707 /**
2708  * Helper class for file movement
2709  * @ingroup FileAbstraction
2710  */
2711 class LocalFileMoveBatch {
2712         /** @var LocalFile */
2713         protected $file;
2714
2715         /** @var Title */
2716         protected $target;
2717
2718         protected $cur;
2719
2720         protected $olds;
2721
2722         protected $oldCount;
2723
2724         protected $archive;
2725
2726         /** @var DatabaseBase */
2727         protected $db;
2728
2729         /**
2730          * @param File $file
2731          * @param Title $target
2732          */
2733         function __construct( File $file, Title $target ) {
2734                 $this->file = $file;
2735                 $this->target = $target;
2736                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
2737                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() );
2738                 $this->oldName = $this->file->getName();
2739                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
2740                 $this->oldRel = $this->oldHash . $this->oldName;
2741                 $this->newRel = $this->newHash . $this->newName;
2742                 $this->db = $file->getRepo()->getMasterDb();
2743         }
2744
2745         /**
2746          * Add the current image to the batch
2747          */
2748         function addCurrent() {
2749                 $this->cur = array( $this->oldRel, $this->newRel );
2750         }
2751
2752         /**
2753          * Add the old versions of the image to the batch
2754          * @return array List of archive names from old versions
2755          */
2756         function addOlds() {
2757                 $archiveBase = 'archive';
2758                 $this->olds = array();
2759                 $this->oldCount = 0;
2760                 $archiveNames = array();
2761
2762                 $result = $this->db->select( 'oldimage',
2763                         array( 'oi_archive_name', 'oi_deleted' ),
2764                         array( 'oi_name' => $this->oldName ),
2765                         __METHOD__
2766                 );
2767
2768                 foreach ( $result as $row ) {
2769                         $archiveNames[] = $row->oi_archive_name;
2770                         $oldName = $row->oi_archive_name;
2771                         $bits = explode( '!', $oldName, 2 );
2772
2773                         if ( count( $bits ) != 2 ) {
2774                                 wfDebug( "Old file name missing !: '$oldName' \n" );
2775                                 continue;
2776                         }
2777
2778                         list( $timestamp, $filename ) = $bits;
2779
2780                         if ( $this->oldName != $filename ) {
2781                                 wfDebug( "Old file name doesn't match: '$oldName' \n" );
2782                                 continue;
2783                         }
2784
2785                         $this->oldCount++;
2786
2787                         // Do we want to add those to oldCount?
2788                         if ( $row->oi_deleted & File::DELETED_FILE ) {
2789                                 continue;
2790                         }
2791
2792                         $this->olds[] = array(
2793                                 "{$archiveBase}/{$this->oldHash}{$oldName}",
2794                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
2795                         );
2796                 }
2797
2798                 return $archiveNames;
2799         }
2800
2801         /**
2802          * Perform the move.
2803          * @return FileRepoStatus
2804          */
2805         function execute() {
2806                 $repo = $this->file->repo;
2807                 $status = $repo->newGood();
2808
2809                 $triplets = $this->getMoveTriplets();
2810                 $triplets = $this->removeNonexistentFiles( $triplets );
2811                 $destFile = wfLocalFile( $this->target );
2812
2813                 $this->file->lock(); // begin
2814                 $destFile->lock(); // quickly fail if destination is not available
2815                 // Rename the file versions metadata in the DB.
2816                 // This implicitly locks the destination file, which avoids race conditions.
2817                 // If we moved the files from A -> C before DB updates, another process could
2818                 // move files from B -> C at this point, causing storeBatch() to fail and thus
2819                 // cleanupTarget() to trigger. It would delete the C files and cause data loss.
2820                 $statusDb = $this->doDBUpdates();
2821                 if ( !$statusDb->isGood() ) {
2822                         $this->file->unlockAndRollback();
2823                         $statusDb->ok = false;
2824
2825                         return $statusDb;
2826                 }
2827                 wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: " .
2828                         "{$statusDb->successCount} successes, {$statusDb->failCount} failures" );
2829
2830                 // Copy the files into their new location.
2831                 // If a prior process fataled copying or cleaning up files we tolerate any
2832                 // of the existing files if they are identical to the ones being stored.
2833                 $statusMove = $repo->storeBatch( $triplets, FileRepo::OVERWRITE_SAME );
2834                 wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: " .
2835                         "{$statusMove->successCount} successes, {$statusMove->failCount} failures" );
2836                 if ( !$statusMove->isGood() ) {
2837                         // Delete any files copied over (while the destination is still locked)
2838                         $this->cleanupTarget( $triplets );
2839                         $this->file->unlockAndRollback(); // unlocks the destination
2840                         wfDebugLog( 'imagemove', "Error in moving files: " . $statusMove->getWikiText() );
2841                         $statusMove->ok = false;
2842
2843                         return $statusMove;
2844                 }
2845                 $destFile->unlock();
2846                 $this->file->unlock(); // done
2847
2848                 // Everything went ok, remove the source files
2849                 $this->cleanupSource( $triplets );
2850
2851                 $status->merge( $statusDb );
2852                 $status->merge( $statusMove );
2853
2854                 return $status;
2855         }
2856
2857         /**
2858          * Do the database updates and return a new FileRepoStatus indicating how
2859          * many rows where updated.
2860          *
2861          * @return FileRepoStatus
2862          */
2863         function doDBUpdates() {
2864                 $repo = $this->file->repo;
2865                 $status = $repo->newGood();
2866                 $dbw = $this->db;
2867
2868                 // Update current image
2869                 $dbw->update(
2870                         'image',
2871                         array( 'img_name' => $this->newName ),
2872                         array( 'img_name' => $this->oldName ),
2873                         __METHOD__
2874                 );
2875
2876                 if ( $dbw->affectedRows() ) {
2877                         $status->successCount++;
2878                 } else {
2879                         $status->failCount++;
2880                         $status->fatal( 'imageinvalidfilename' );
2881
2882                         return $status;
2883                 }
2884
2885                 // Update old images
2886                 $dbw->update(
2887                         'oldimage',
2888                         array(
2889                                 'oi_name' => $this->newName,
2890                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name',
2891                                         $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ),
2892                         ),
2893                         array( 'oi_name' => $this->oldName ),
2894                         __METHOD__
2895                 );
2896
2897                 $affected = $dbw->affectedRows();
2898                 $total = $this->oldCount;
2899                 $status->successCount += $affected;
2900                 // Bug 34934: $total is based on files that actually exist.
2901                 // There may be more DB rows than such files, in which case $affected
2902                 // can be greater than $total. We use max() to avoid negatives here.
2903                 $status->failCount += max( 0, $total - $affected );
2904                 if ( $status->failCount ) {
2905                         $status->error( 'imageinvalidfilename' );
2906                 }
2907
2908                 return $status;
2909         }
2910
2911         /**
2912          * Generate triplets for FileRepo::storeBatch().
2913          * @return array
2914          */
2915         function getMoveTriplets() {
2916                 $moves = array_merge( array( $this->cur ), $this->olds );
2917                 $triplets = array(); // The format is: (srcUrl, destZone, destUrl)
2918
2919                 foreach ( $moves as $move ) {
2920                         // $move: (oldRelativePath, newRelativePath)
2921                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
2922                         $triplets[] = array( $srcUrl, 'public', $move[1] );
2923                         wfDebugLog(
2924                                 'imagemove',
2925                                 "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}"
2926                         );
2927                 }
2928
2929                 return $triplets;
2930         }
2931
2932         /**
2933          * Removes non-existent files from move batch.
2934          * @param array $triplets
2935          * @return array
2936          */
2937         function removeNonexistentFiles( $triplets ) {
2938                 $files = array();
2939
2940                 foreach ( $triplets as $file ) {
2941                         $files[$file[0]] = $file[0];
2942                 }
2943
2944                 $result = $this->file->repo->fileExistsBatch( $files );
2945                 $filteredTriplets = array();
2946
2947                 foreach ( $triplets as $file ) {
2948                         if ( $result[$file[0]] ) {
2949                                 $filteredTriplets[] = $file;
2950                         } else {
2951                                 wfDebugLog( 'imagemove', "File {$file[0]} does not exist" );
2952                         }
2953                 }
2954
2955                 return $filteredTriplets;
2956         }
2957
2958         /**
2959          * Cleanup a partially moved array of triplets by deleting the target
2960          * files. Called if something went wrong half way.
2961          */
2962         function cleanupTarget( $triplets ) {
2963                 // Create dest pairs from the triplets
2964                 $pairs = array();
2965                 foreach ( $triplets as $triplet ) {
2966                         // $triplet: (old source virtual URL, dst zone, dest rel)
2967                         $pairs[] = array( $triplet[1], $triplet[2] );
2968                 }
2969
2970                 $this->file->repo->cleanupBatch( $pairs );
2971         }
2972
2973         /**
2974          * Cleanup a fully moved array of triplets by deleting the source files.
2975          * Called at the end of the move process if everything else went ok.
2976          */
2977         function cleanupSource( $triplets ) {
2978                 // Create source file names from the triplets
2979                 $files = array();
2980                 foreach ( $triplets as $triplet ) {
2981                         $files[] = $triplet[0];
2982                 }
2983
2984                 $this->file->repo->cleanupBatch( $files );
2985         }
2986 }