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