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