includes/filerepo/LocalFile.php

   1 <?php
   2 /**
   3  */
   4
   5 /**
   6  * Bump this number when serialized cache records may be incompatible.
   7  */
   8 define( 'MW_FILE_VERSION', 8 );
   9
  10 /**
  11  * Class to represent a local file in the wiki's own database
  12  *
  13  * Provides methods to retrieve paths (physical, logical, URL),
  14  * to generate image thumbnails or for uploading.
  15  *
  16  * Note that only the repo object knows what its file class is called. You should
  17  * never name a file class explictly outside of the repo class. Instead use the
  18  * repo's factory functions to generate file objects, for example:
  19  *
  20  * RepoGroup::singleton()->getLocalRepo()->newFile($title);
  21  *
  22  * The convenience functions wfLocalFile() and wfFindFile() should be sufficient
  23  * in most cases.
  24  *
  25  * @ingroup FileRepo
  26  */
  27 class LocalFile extends File
  28 {
  29         /**#@+
  30          * @private
  31          */
  32         var     $fileExists,       # does the file file exist on disk? (loadFromXxx)
  33                 $historyLine,      # Number of line to return by nextHistoryLine() (constructor)
  34                 $historyRes,       # result of the query for the file's history (nextHistoryLine)
  35                 $width,            # \
  36                 $height,           #  |
  37                 $bits,             #   --- returned by getimagesize (loadFromXxx)
  38                 $attr,             # /
  39                 $media_type,       # MEDIATYPE_xxx (bitmap, drawing, audio...)
  40                 $mime,             # MIME type, determined by MimeMagic::guessMimeType
  41                 $major_mime,       # Major mime type
  42                 $minor_mime,       # Minor mime type
  43                 $size,             # Size in bytes (loadFromXxx)
  44                 $metadata,         # Handler-specific metadata
  45                 $timestamp,        # Upload timestamp
  46                 $sha1,             # SHA-1 base 36 content hash
  47                 $user, $user_text, # User, who uploaded the file
  48                 $description,      # Description of current revision of the file
  49                 $dataLoaded,       # Whether or not all this has been loaded from the database (loadFromXxx)
  50                 $upgraded,         # Whether the row was upgraded on load
  51                 $locked,           # True if the image row is locked
  52                 $deleted;       # Bitfield akin to rev_deleted
  53
  54         /**#@-*/
  55
  56         /**
  57          * Create a LocalFile from a title
  58          * Do not call this except from inside a repo class.
  59          *
  60          * Note: $unused param is only here to avoid an E_STRICT
  61          */
  62         static function newFromTitle( $title, $repo, $unused = null ) {
  63                 return new self( $title, $repo );
  64         }
  65
  66         /**
  67          * Create a LocalFile from a title
  68          * Do not call this except from inside a repo class.
  69          */
  70         static function newFromRow( $row, $repo ) {
  71                 $title = Title::makeTitle( NS_IMAGE, $row->img_name );
  72                 $file = new self( $title, $repo );
  73                 $file->loadFromRow( $row );
  74                 return $file;
  75         }
  76
  77         /**
  78          * Create a LocalFile from a SHA-1 key
  79          * Do not call this except from inside a repo class.
  80          */
  81         static function newFromKey( $sha1, $repo, $timestamp = false ) {
  82                 # Polymorphic function name to distinguish foreign and local fetches
  83                 $fname = get_class( $this ) . '::' . __FUNCTION__;
  84
  85                 $conds = array( 'img_sha1' => $sha1 );
  86                 if( $timestamp ) {
  87                         $conds['img_timestamp'] = $timestamp;
  88                 }
  89                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ), $conds, $fname );
  90                 if( $row ) {
  91                         return self::newFromRow( $row, $repo );
  92                 } else {
  93                         return false;
  94                 }
  95         }
  96
  97         /**
  98          * Fields in the image table
  99          */
 100         static function selectFields() {
 101                 return array(
 102                         'img_name',
 103                         'img_size',
 104                         'img_width',
 105                         'img_height',
 106                         'img_metadata',
 107                         'img_bits',
 108                         'img_media_type',
 109                         'img_major_mime',
 110                         'img_minor_mime',
 111                         'img_description',
 112                         'img_user',
 113                         'img_user_text',
 114                         'img_timestamp',
 115                         'img_sha1',
 116                 );
 117         }
 118
 119         /**
 120          * Constructor.
 121          * Do not call this except from inside a repo class.
 122          */
 123         function __construct( $title, $repo ) {
 124                 if( !is_object( $title ) ) {
 125                         throw new MWException( __CLASS__.' constructor given bogus title.' );
 126                 }
 127                 parent::__construct( $title, $repo );
 128                 $this->metadata = '';
 129                 $this->historyLine = 0;
 130                 $this->historyRes = null;
 131                 $this->dataLoaded = false;
 132         }
 133
 134         /**
 135          * Get the memcached key
 136          */
 137         function getCacheKey() {
 138                 $hashedName = md5($this->getName());
 139                 return wfMemcKey( 'file', $hashedName );
 140         }
 141
 142         /**
 143          * Try to load file metadata from memcached. Returns true on success.
 144          */
 145         function loadFromCache() {
 146                 global $wgMemc;
 147                 wfProfileIn( __METHOD__ );
 148                 $this->dataLoaded = false;
 149                 $key = $this->getCacheKey();
 150                 if ( !$key ) {
 151                         return false;
 152                 }
 153                 $cachedValues = $wgMemc->get( $key );
 154
 155                 // Check if the key existed and belongs to this version of MediaWiki
 156                 if ( isset($cachedValues['version']) && ( $cachedValues['version'] == MW_FILE_VERSION ) ) {
 157                         wfDebug( "Pulling file metadata from cache key $key\n" );
 158                         $this->fileExists = $cachedValues['fileExists'];
 159                         if ( $this->fileExists ) {
 160                                 $this->setProps( $cachedValues );
 161                         }
 162                         $this->dataLoaded = true;
 163                 }
 164                 if ( $this->dataLoaded ) {
 165                         wfIncrStats( 'image_cache_hit' );
 166                 } else {
 167                         wfIncrStats( 'image_cache_miss' );
 168                 }
 169
 170                 wfProfileOut( __METHOD__ );
 171                 return $this->dataLoaded;
 172         }
 173
 174         /**
 175          * Save the file metadata to memcached
 176          */
 177         function saveToCache() {
 178                 global $wgMemc;
 179                 $this->load();
 180                 $key = $this->getCacheKey();
 181                 if ( !$key ) {
 182                         return;
 183                 }
 184                 $fields = $this->getCacheFields( '' );
 185                 $cache = array( 'version' => MW_FILE_VERSION );
 186                 $cache['fileExists'] = $this->fileExists;
 187                 if ( $this->fileExists ) {
 188                         foreach ( $fields as $field ) {
 189                                 $cache[$field] = $this->$field;
 190                         }
 191                 }
 192
 193                 $wgMemc->set( $key, $cache, 60 * 60 * 24 * 7 ); // A week
 194         }
 195
 196         /**
 197          * Load metadata from the file itself
 198          */
 199         function loadFromFile() {
 200                 $this->setProps( self::getPropsFromPath( $this->getPath() ) );
 201         }
 202
 203         function getCacheFields( $prefix = 'img_' ) {
 204                 static $fields = array( 'size', 'width', 'height', 'bits', 'media_type',
 205                         'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user', 'user_text', 'description' );
 206                 static $results = array();
 207                 if ( $prefix == '' ) {
 208                         return $fields;
 209                 }
 210                 if ( !isset( $results[$prefix] ) ) {
 211                         $prefixedFields = array();
 212                         foreach ( $fields as $field ) {
 213                                 $prefixedFields[] = $prefix . $field;
 214                         }
 215                         $results[$prefix] = $prefixedFields;
 216                 }
 217                 return $results[$prefix];
 218         }
 219
 220         /**
 221          * Load file metadata from the DB
 222          */
 223         function loadFromDB() {
 224                 # Polymorphic function name to distinguish foreign and local fetches
 225                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 226                 wfProfileIn( $fname );
 227
 228                 # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
 229                 $this->dataLoaded = true;
 230
 231                 $dbr = $this->repo->getMasterDB();
 232
 233                 $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ),
 234                         array( 'img_name' => $this->getName() ), $fname );
 235                 if ( $row ) {
 236                         $this->loadFromRow( $row );
 237                 } else {
 238                         $this->fileExists = false;
 239                 }
 240
 241                 wfProfileOut( $fname );
 242         }
 243
 244         /**
 245          * Decode a row from the database (either object or array) to an array
 246          * with timestamps and MIME types decoded, and the field prefix removed.
 247          */
 248         function decodeRow( $row, $prefix = 'img_' ) {
 249                 $array = (array)$row;
 250                 $prefixLength = strlen( $prefix );
 251                 // Sanity check prefix once
 252                 if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) {
 253                         throw new MWException( __METHOD__. ': incorrect $prefix parameter' );
 254                 }
 255                 $decoded = array();
 256                 foreach ( $array as $name => $value ) {
 257                         $decoded[substr( $name, $prefixLength )] = $value;
 258                 }
 259                 $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] );
 260                 if ( empty( $decoded['major_mime'] ) ) {
 261                         $decoded['mime'] = "unknown/unknown";
 262                 } else {
 263                         if (!$decoded['minor_mime']) {
 264                                 $decoded['minor_mime'] = "unknown";
 265                         }
 266                         $decoded['mime'] = $decoded['major_mime'].'/'.$decoded['minor_mime'];
 267                 }
 268                 # Trim zero padding from char/binary field
 269                 $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" );
 270                 return $decoded;
 271         }
 272
 273         /*
 274          * Load file metadata from a DB result row
 275          */
 276         function loadFromRow( $row, $prefix = 'img_' ) {
 277                 $this->dataLoaded = true;
 278                 $array = $this->decodeRow( $row, $prefix );
 279                 foreach ( $array as $name => $value ) {
 280                         $this->$name = $value;
 281                 }
 282                 $this->fileExists = true;
 283                 $this->maybeUpgradeRow();
 284         }
 285
 286         /**
 287          * Load file metadata from cache or DB, unless already loaded
 288          */
 289         function load() {
 290                 if ( !$this->dataLoaded ) {
 291                         if ( !$this->loadFromCache() ) {
 292                                 $this->loadFromDB();
 293                                 $this->saveToCache();
 294                         }
 295                         $this->dataLoaded = true;
 296                 }
 297         }
 298
 299         /**
 300          * Upgrade a row if it needs it
 301          */
 302         function maybeUpgradeRow() {
 303                 if ( wfReadOnly() ) {
 304                         return;
 305                 }
 306                 if ( is_null($this->media_type) ||
 307                         $this->mime == 'image/svg'
 308                 ) {
 309                         $this->upgradeRow();
 310                         $this->upgraded = true;
 311                 } else {
 312                         $handler = $this->getHandler();
 313                         if ( $handler && !$handler->isMetadataValid( $this, $this->metadata ) ) {
 314                                 $this->upgradeRow();
 315                                 $this->upgraded = true;
 316                         }
 317                 }
 318         }
 319
 320         function getUpgraded() {
 321                 return $this->upgraded;
 322         }
 323
 324         /**
 325          * Fix assorted version-related problems with the image row by reloading it from the file
 326          */
 327         function upgradeRow() {
 328                 wfProfileIn( __METHOD__ );
 329
 330                 $this->loadFromFile();
 331
 332                 # Don't destroy file info of missing files
 333                 if ( !$this->fileExists ) {
 334                         wfDebug( __METHOD__.": file does not exist, aborting\n" );
 335                         return;
 336                 }
 337                 $dbw = $this->repo->getMasterDB();
 338                 list( $major, $minor ) = self::splitMime( $this->mime );
 339
 340                 if ( wfReadOnly() ) {
 341                         return;
 342                 }
 343                 wfDebug(__METHOD__.': upgrading '.$this->getName()." to the current schema\n");
 344
 345                 $dbw->update( 'image',
 346                         array(
 347                                 'img_width' => $this->width,
 348                                 'img_height' => $this->height,
 349                                 'img_bits' => $this->bits,
 350                                 'img_media_type' => $this->media_type,
 351                                 'img_major_mime' => $major,
 352                                 'img_minor_mime' => $minor,
 353                                 'img_metadata' => $this->metadata,
 354                                 'img_sha1' => $this->sha1,
 355                         ), array( 'img_name' => $this->getName() ),
 356                         __METHOD__
 357                 );
 358                 $this->saveToCache();
 359                 wfProfileOut( __METHOD__ );
 360         }
 361
 362         /**
 363          * Set properties in this object to be equal to those given in the
 364          * associative array $info. Only cacheable fields can be set.
 365          *
 366          * If 'mime' is given, it will be split into major_mime/minor_mime.
 367          * If major_mime/minor_mime are given, $this->mime will also be set.
 368          */
 369         function setProps( $info ) {
 370                 $this->dataLoaded = true;
 371                 $fields = $this->getCacheFields( '' );
 372                 $fields[] = 'fileExists';
 373                 foreach ( $fields as $field ) {
 374                         if ( isset( $info[$field] ) ) {
 375                                 $this->$field = $info[$field];
 376                         }
 377                 }
 378                 // Fix up mime fields
 379                 if ( isset( $info['major_mime'] ) ) {
 380                         $this->mime = "{$info['major_mime']}/{$info['minor_mime']}";
 381                 } elseif ( isset( $info['mime'] ) ) {
 382                         list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime );
 383                 }
 384         }
 385
 386         /** splitMime inherited */
 387         /** getName inherited */
 388         /** getTitle inherited */
 389         /** getURL inherited */
 390         /** getViewURL inherited */
 391         /** getPath inherited */
 392         /** isVisible inhereted */
 393
 394         /**
 395          * Return the width of the image
 396          *
 397          * Returns false on error
 398          * @public
 399          */
 400         function getWidth( $page = 1 ) {
 401                 $this->load();
 402                 if ( $this->isMultipage() ) {
 403                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 404                         if ( $dim ) {
 405                                 return $dim['width'];
 406                         } else {
 407                                 return false;
 408                         }
 409                 } else {
 410                         return $this->width;
 411                 }
 412         }
 413
 414         /**
 415          * Return the height of the image
 416          *
 417          * Returns false on error
 418          * @public
 419          */
 420         function getHeight( $page = 1 ) {
 421                 $this->load();
 422                 if ( $this->isMultipage() ) {
 423                         $dim = $this->getHandler()->getPageDimensions( $this, $page );
 424                         if ( $dim ) {
 425                                 return $dim['height'];
 426                         } else {
 427                                 return false;
 428                         }
 429                 } else {
 430                         return $this->height;
 431                 }
 432         }
 433
 434         /**
 435          * Returns ID or name of user who uploaded the file
 436          *
 437          * @param $type string 'text' or 'id'
 438          */
 439         function getUser($type='text') {
 440                 $this->load();
 441                 if( $type == 'text' ) {
 442                         return $this->user_text;
 443                 } elseif( $type == 'id' ) {
 444                         return $this->user;
 445                 }
 446         }
 447
 448         /**
 449          * Get handler-specific metadata
 450          */
 451         function getMetadata() {
 452                 $this->load();
 453                 return $this->metadata;
 454         }
 455
 456         /**
 457          * Return the size of the image file, in bytes
 458          * @public
 459          */
 460         function getSize() {
 461                 $this->load();
 462                 return $this->size;
 463         }
 464
 465         /**
 466          * Returns the mime type of the file.
 467          */
 468         function getMimeType() {
 469                 $this->load();
 470                 return $this->mime;
 471         }
 472
 473         /**
 474          * Return the type of the media in the file.
 475          * Use the value returned by this function with the MEDIATYPE_xxx constants.
 476          */
 477         function getMediaType() {
 478                 $this->load();
 479                 return $this->media_type;
 480         }
 481
 482         /** canRender inherited */
 483         /** mustRender inherited */
 484         /** allowInlineDisplay inherited */
 485         /** isSafeFile inherited */
 486         /** isTrustedFile inherited */
 487
 488         /**
 489          * Returns true if the file file exists on disk.
 490          * @return boolean Whether file file exist on disk.
 491          * @public
 492          */
 493         function exists() {
 494                 $this->load();
 495                 return $this->fileExists;
 496         }
 497
 498         /** getTransformScript inherited */
 499         /** getUnscaledThumb inherited */
 500         /** thumbName inherited */
 501         /** createThumb inherited */
 502         /** getThumbnail inherited */
 503         /** transform inherited */
 504
 505         /**
 506          * Fix thumbnail files from 1.4 or before, with extreme prejudice
 507          */
 508         function migrateThumbFile( $thumbName ) {
 509                 $thumbDir = $this->getThumbPath();
 510                 $thumbPath = "$thumbDir/$thumbName";
 511                 if ( is_dir( $thumbPath ) ) {
 512                         // Directory where file should be
 513                         // This happened occasionally due to broken migration code in 1.5
 514                         // Rename to broken-*
 515                         for ( $i = 0; $i < 100 ; $i++ ) {
 516                                 $broken = $this->repo->getZonePath('public') . "/broken-$i-$thumbName";
 517                                 if ( !file_exists( $broken ) ) {
 518                                         rename( $thumbPath, $broken );
 519                                         break;
 520                                 }
 521                         }
 522                         // Doesn't exist anymore
 523                         clearstatcache();
 524                 }
 525                 if ( is_file( $thumbDir ) ) {
 526                         // File where directory should be
 527                         unlink( $thumbDir );
 528                         // Doesn't exist anymore
 529                         clearstatcache();
 530                 }
 531         }
 532
 533         /** getHandler inherited */
 534         /** iconThumb inherited */
 535         /** getLastError inherited */
 536
 537         /**
 538          * Get all thumbnail names previously generated for this file
 539          */
 540         function getThumbnails() {
 541                 $this->load();
 542                 $files = array();
 543                 $dir = $this->getThumbPath();
 544
 545                 if ( is_dir( $dir ) ) {
 546                         $handle = opendir( $dir );
 547
 548                         if ( $handle ) {
 549                                 while ( false !== ( $file = readdir($handle) ) ) {
 550                                         if ( $file{0} != '.' ) {
 551                                                 $files[] = $file;
 552                                         }
 553                                 }
 554                                 closedir( $handle );
 555                         }
 556                 }
 557
 558                 return $files;
 559         }
 560
 561         /**
 562          * Refresh metadata in memcached, but don't touch thumbnails or squid
 563          */
 564         function purgeMetadataCache() {
 565                 $this->loadFromDB();
 566                 $this->saveToCache();
 567                 $this->purgeHistory();
 568         }
 569
 570         /**
 571          * Purge the shared history (OldLocalFile) cache
 572          */
 573         function purgeHistory() {
 574                 global $wgMemc;
 575                 $hashedName = md5($this->getName());
 576                 $oldKey = wfMemcKey( 'oldfile', $hashedName );
 577                 $wgMemc->delete( $oldKey );
 578         }
 579
 580         /**
 581          * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid
 582          */
 583         function purgeCache() {
 584                 // Refresh metadata cache
 585                 $this->purgeMetadataCache();
 586
 587                 // Delete thumbnails
 588                 $this->purgeThumbnails();
 589
 590                 // Purge squid cache for this file
 591                 SquidUpdate::purge( array( $this->getURL() ) );
 592         }
 593
 594         /**
 595          * Delete cached transformed files
 596          */
 597         function purgeThumbnails() {
 598                 global $wgUseSquid;
 599                 // Delete thumbnails
 600                 $files = $this->getThumbnails();
 601                 $dir = $this->getThumbPath();
 602                 $urls = array();
 603                 foreach ( $files as $file ) {
 604                         # Check that the base file name is part of the thumb name
 605                         # This is a basic sanity check to avoid erasing unrelated directories
 606                         if ( strpos( $file, $this->getName() ) !== false ) {
 607                                 $url = $this->getThumbUrl( $file );
 608                                 $urls[] = $url;
 609                                 @unlink( "$dir/$file" );
 610                         }
 611                 }
 612
 613                 // Purge the squid
 614                 if ( $wgUseSquid ) {
 615                         SquidUpdate::purge( $urls );
 616                 }
 617         }
 618
 619         /** purgeDescription inherited */
 620         /** purgeEverything inherited */
 621
 622         function getHistory($limit = null, $start = null, $end = null) {
 623                 $dbr = $this->repo->getSlaveDB();
 624                 $conds = $opts = array();
 625                 $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBKey() );
 626                 if( $start !== null ) {
 627                         $conds[] = "oi_timestamp <= " . $dbr->addQuotes( $dbr->timestamp( $start ) );
 628                 }
 629                 if( $end !== null ) {
 630                         $conds[] = "oi_timestamp >= " . $dbr->addQuotes( $dbr->timestamp( $end ) );
 631                 }
 632                 if( $limit ) {
 633                         $opts['LIMIT'] = $limit;
 634                 }
 635                 $opts['ORDER BY'] = 'oi_timestamp DESC';
 636                 $res = $dbr->select('oldimage', '*', $conds, __METHOD__, $opts);
 637                 $r = array();
 638                 while( $row = $dbr->fetchObject($res) ) {
 639                         $r[] = OldLocalFile::newFromRow($row, $this->repo);
 640                 }
 641                 return $r;
 642         }
 643
 644         /**
 645          * Return the history of this file, line by line.
 646          * starts with current version, then old versions.
 647          * uses $this->historyLine to check which line to return:
 648          *  0      return line for current version
 649          *  1      query for old versions, return first one
 650          *  2, ... return next old version from above query
 651          *
 652          * @public
 653          */
 654         function nextHistoryLine() {
 655                 # Polymorphic function name to distinguish foreign and local fetches
 656                 $fname = get_class( $this ) . '::' . __FUNCTION__;
 657
 658                 $dbr = $this->repo->getSlaveDB();
 659
 660                 if ( $this->historyLine == 0 ) {// called for the first time, return line from cur
 661                         $this->historyRes = $dbr->select( 'image',
 662                                 array(
 663                                         '*',
 664                                         "'' AS oi_archive_name",
 665                                         '0 as oi_deleted',
 666                                         'img_sha1'
 667                                 ),
 668                                 array( 'img_name' => $this->title->getDBkey() ),
 669                                 $fname
 670                         );
 671                         if ( 0 == $dbr->numRows( $this->historyRes ) ) {
 672                                 $dbr->freeResult($this->historyRes);
 673                                 $this->historyRes = null;
 674                                 return FALSE;
 675                         }
 676                 } else if ( $this->historyLine == 1 ) {
 677                         $dbr->freeResult($this->historyRes);
 678                         $this->historyRes = $dbr->select( 'oldimage', '*',
 679                                 array( 'oi_name' => $this->title->getDBkey() ),
 680                                 $fname,
 681                                 array( 'ORDER BY' => 'oi_timestamp DESC' )
 682                         );
 683                 }
 684                 $this->historyLine ++;
 685
 686                 return $dbr->fetchObject( $this->historyRes );
 687         }
 688
 689         /**
 690          * Reset the history pointer to the first element of the history
 691          * @public
 692          */
 693         function resetHistory() {
 694                 $this->historyLine = 0;
 695                 if (!is_null($this->historyRes)) {
 696                         $this->repo->getSlaveDB()->freeResult($this->historyRes);
 697                         $this->historyRes = null;
 698                 }
 699         }
 700
 701         /** getFullPath inherited */
 702         /** getHashPath inherited */
 703         /** getRel inherited */
 704         /** getUrlRel inherited */
 705         /** getArchiveRel inherited */
 706         /** getThumbRel inherited */
 707         /** getArchivePath inherited */
 708         /** getThumbPath inherited */
 709         /** getArchiveUrl inherited */
 710         /** getThumbUrl inherited */
 711         /** getArchiveVirtualUrl inherited */
 712         /** getThumbVirtualUrl inherited */
 713         /** isHashed inherited */
 714
 715         /**
 716          * Upload a file and record it in the DB
 717          * @param string $srcPath Source path or virtual URL
 718          * @param string $comment Upload description
 719          * @param string $pageText Text to use for the new description page, if a new description page is created
 720          * @param integer $flags Flags for publish()
 721          * @param array $props File properties, if known. This can be used to reduce the
 722          *                         upload time when uploading virtual URLs for which the file info
 723          *                         is already known
 724          * @param string $timestamp Timestamp for img_timestamp, or false to use the current time
 725          *
 726          * @return FileRepoStatus object. On success, the value member contains the
 727          *     archive name, or an empty string if it was a new file.
 728          */
 729         function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false, $timestamp = false ) {
 730                 $this->lock();
 731                 $status = $this->publish( $srcPath, $flags );
 732                 if ( $status->ok ) {
 733                         if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp ) ) {
 734                                 $status->fatal( 'filenotfound', $srcPath );
 735                         }
 736                 }
 737                 $this->unlock();
 738                 return $status;
 739         }
 740
 741         /**
 742          * Record a file upload in the upload log and the image table
 743          * @deprecated use upload()
 744          */
 745         function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '',
 746                 $watch = false, $timestamp = false )
 747         {
 748                 $pageText = UploadForm::getInitialPageText( $desc, $license, $copyStatus, $source );
 749                 if ( !$this->recordUpload2( $oldver, $desc, $pageText ) ) {
 750                         return false;
 751                 }
 752                 if ( $watch ) {
 753                         global $wgUser;
 754                         $wgUser->addWatch( $this->getTitle() );
 755                 }
 756                 return true;
 757
 758         }
 759
 760         /**
 761          * Record a file upload in the upload log and the image table
 762          */
 763         function recordUpload2( $oldver, $comment, $pageText, $props = false, $timestamp = false )
 764         {
 765                 global $wgUser;
 766
 767                 $dbw = $this->repo->getMasterDB();
 768
 769                 if ( !$props ) {
 770                         $props = $this->repo->getFileProps( $this->getVirtualUrl() );
 771                 }
 772                 $props['description'] = $comment;
 773                 $props['user'] = $wgUser->getID();
 774                 $props['user_text'] = $wgUser->getName();
 775                 $props['timestamp'] = wfTimestamp( TS_MW );
 776                 $this->setProps( $props );
 777
 778                 // Delete thumbnails and refresh the metadata cache
 779                 $this->purgeThumbnails();
 780                 $this->saveToCache();
 781                 SquidUpdate::purge( array( $this->getURL() ) );
 782
 783                 // Fail now if the file isn't there
 784                 if ( !$this->fileExists ) {
 785                         wfDebug( __METHOD__.": File ".$this->getPath()." went missing!\n" );
 786                         return false;
 787                 }
 788
 789                 $reupload = false;
 790                 if ( $timestamp === false ) {
 791                         $timestamp = $dbw->timestamp();
 792                 }
 793
 794                 # Test to see if the row exists using INSERT IGNORE
 795                 # This avoids race conditions by locking the row until the commit, and also
 796                 # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
 797                 $dbw->insert( 'image',
 798                         array(
 799                                 'img_name' => $this->getName(),
 800                                 'img_size'=> $this->size,
 801                                 'img_width' => intval( $this->width ),
 802                                 'img_height' => intval( $this->height ),
 803                                 'img_bits' => $this->bits,
 804                                 'img_media_type' => $this->media_type,
 805                                 'img_major_mime' => $this->major_mime,
 806                                 'img_minor_mime' => $this->minor_mime,
 807                                 'img_timestamp' => $timestamp,
 808                                 'img_description' => $comment,
 809                                 'img_user' => $wgUser->getID(),
 810                                 'img_user_text' => $wgUser->getName(),
 811                                 'img_metadata' => $this->metadata,
 812                                 'img_sha1' => $this->sha1
 813                         ),
 814                         __METHOD__,
 815                         'IGNORE'
 816                 );
 817
 818                 if( $dbw->affectedRows() == 0 ) {
 819                         $reupload = true;
 820
 821                         # Collision, this is an update of a file
 822                         # Insert previous contents into oldimage
 823                         $dbw->insertSelect( 'oldimage', 'image',
 824                                 array(
 825                                         'oi_name' => 'img_name',
 826                                         'oi_archive_name' => $dbw->addQuotes( $oldver ),
 827                                         'oi_size' => 'img_size',
 828                                         'oi_width' => 'img_width',
 829                                         'oi_height' => 'img_height',
 830                                         'oi_bits' => 'img_bits',
 831                                         'oi_timestamp' => 'img_timestamp',
 832                                         'oi_description' => 'img_description',
 833                                         'oi_user' => 'img_user',
 834                                         'oi_user_text' => 'img_user_text',
 835                                         'oi_metadata' => 'img_metadata',
 836                                         'oi_media_type' => 'img_media_type',
 837                                         'oi_major_mime' => 'img_major_mime',
 838                                         'oi_minor_mime' => 'img_minor_mime',
 839                                         'oi_sha1' => 'img_sha1'
 840                                 ), array( 'img_name' => $this->getName() ), __METHOD__
 841                         );
 842
 843                         # Update the current image row
 844                         $dbw->update( 'image',
 845                                 array( /* SET */
 846                                         'img_size' => $this->size,
 847                                         'img_width' => intval( $this->width ),
 848                                         'img_height' => intval( $this->height ),
 849                                         'img_bits' => $this->bits,
 850                                         'img_media_type' => $this->media_type,
 851                                         'img_major_mime' => $this->major_mime,
 852                                         'img_minor_mime' => $this->minor_mime,
 853                                         'img_timestamp' => $timestamp,
 854                                         'img_description' => $comment,
 855                                         'img_user' => $wgUser->getID(),
 856                                         'img_user_text' => $wgUser->getName(),
 857                                         'img_metadata' => $this->metadata,
 858                                         'img_sha1' => $this->sha1
 859                                 ), array( /* WHERE */
 860                                         'img_name' => $this->getName()
 861                                 ), __METHOD__
 862                         );
 863                 } else {
 864                         # This is a new file
 865                         # Update the image count
 866                         $site_stats = $dbw->tableName( 'site_stats' );
 867                         $dbw->query( "UPDATE $site_stats SET ss_images=ss_images+1", __METHOD__ );
 868                 }
 869
 870                 $descTitle = $this->getTitle();
 871                 $article = new Article( $descTitle );
 872
 873                 # Add the log entry
 874                 $log = new LogPage( 'upload' );
 875                 $action = $reupload ? 'overwrite' : 'upload';
 876                 $log->addEntry( $action, $descTitle, $comment );
 877
 878                 if( $descTitle->exists() ) {
 879                         # Create a null revision
 880                         $nullRevision = Revision::newNullRevision( $dbw, $descTitle->getArticleId(), $log->getRcComment(), false );
 881                         $nullRevision->insertOn( $dbw );
 882                         wfRunHooks( 'newRevisionFromEditComplete', array($descTitle, $nullRevision, false) );
 883                         $article->updateRevisionOn( $dbw, $nullRevision );
 884
 885                         # Invalidate the cache for the description page
 886                         $descTitle->invalidateCache();
 887                         $descTitle->purgeSquid();
 888                 } else {
 889                         // New file; create the description page.
 890                         // There's already a log entry, so don't make a second RC entry
 891                         $article->doEdit( $pageText, $comment, EDIT_NEW | EDIT_SUPPRESS_RC );
 892                 }
 893
 894                 # Hooks, hooks, the magic of hooks...
 895                 wfRunHooks( 'FileUpload', array( $this ) );
 896
 897                 # Commit the transaction now, in case something goes wrong later
 898                 # The most important thing is that files don't get lost, especially archives
 899                 $dbw->immediateCommit();
 900
 901                 # Invalidate cache for all pages using this file
 902                 $update = new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' );
 903                 $update->doUpdate();
 904                 # Invalidate cache for all pages that redirects on this page
 905                 $redirs = $this->getTitle()->getRedirectsHere();
 906                 foreach( $redirs as $redir ) {
 907                         $update = new HTMLCacheUpdate( $redir, 'imagelinks' );
 908                         $update->doUpdate();
 909                 }
 910
 911                 return true;
 912         }
 913
 914         /**
 915          * Move or copy a file to its public location. If a file exists at the
 916          * destination, move it to an archive. Returns the archive name on success
 917          * or an empty string if it was a new file, and a wikitext-formatted
 918          * WikiError object on failure.
 919          *
 920          * The archive name should be passed through to recordUpload for database
 921          * registration.
 922          *
 923          * @param string $sourcePath Local filesystem path to the source image
 924          * @param integer $flags A bitwise combination of:
 925          *     File::DELETE_SOURCE    Delete the source file, i.e. move
 926          *         rather than copy
 927          * @return FileRepoStatus object. On success, the value member contains the
 928          *     archive name, or an empty string if it was a new file.
 929          */
 930         function publish( $srcPath, $flags = 0 ) {
 931                 $this->lock();
 932                 $dstRel = $this->getRel();
 933                 $archiveName = gmdate( 'YmdHis' ) . '!'. $this->getName();
 934                 $archiveRel = 'archive/' . $this->getHashPath() . $archiveName;
 935                 $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
 936                 $status = $this->repo->publish( $srcPath, $dstRel, $archiveRel, $flags );
 937                 if ( $status->value == 'new' ) {
 938                         $status->value = '';
 939                 } else {
 940                         $status->value = $archiveName;
 941                 }
 942                 $this->unlock();
 943                 return $status;
 944         }
 945
 946         /** getLinksTo inherited */
 947         /** getExifData inherited */
 948         /** isLocal inherited */
 949         /** wasDeleted inherited */
 950
 951         /**
 952          * Move file to the new title
 953          *
 954          * Move current, old version and all thumbnails
 955          * to the new filename. Old file is deleted.
 956          *
 957          * Cache purging is done; checks for validity
 958          * and logging are caller's responsibility
 959          *
 960          * @param $target Title New file name
 961          * @return FileRepoStatus object.
 962          */
 963         function move( $target ) {
 964                 $this->lock();
 965                 $dbw = $this->repo->getMasterDB();
 966                 $batch = new LocalFileMoveBatch( $this, $target, $dbw );
 967                 $batch->addCurrent();
 968                 $batch->addOlds();
 969                 if( !$this->repo->canTransformVia404() ) {
 970                         $batch->addThumbs();
 971                 }
 972
 973                 $status = $batch->execute();
 974                 $this->purgeEverything();
 975                 $this->unlock();
 976
 977                 if ( $status->isOk() ) {
 978                         // Now switch the object
 979                         $this->title = $target;
 980                         // Force regeneration of the name and hashpath
 981                         unset( $this->name );
 982                         unset( $this->hashPath );
 983                         // Purge the new image
 984                         $this->purgeEverything();
 985                 }
 986
 987                 return $status;
 988         }
 989
 990         /**
 991          * Delete all versions of the file.
 992          *
 993          * Moves the files into an archive directory (or deletes them)
 994          * and removes the database rows.
 995          *
 996          * Cache purging is done; logging is caller's responsibility.
 997          *
 998          * @param $reason
 999          * @param $suppress
1000          * @return FileRepoStatus object.
1001          */
1002         function delete( $reason, $suppress = false ) {
1003                 $this->lock();
1004                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1005                 $batch->addCurrent();
1006
1007                 # Get old version relative paths
1008                 $dbw = $this->repo->getMasterDB();
1009                 $result = $dbw->select( 'oldimage',
1010                         array( 'oi_archive_name' ),
1011                         array( 'oi_name' => $this->getName() ) );
1012                 while ( $row = $dbw->fetchObject( $result ) ) {
1013                         $batch->addOld( $row->oi_archive_name );
1014                 }
1015                 $status = $batch->execute();
1016
1017                 if ( $status->ok ) {
1018                         // Update site_stats
1019                         $site_stats = $dbw->tableName( 'site_stats' );
1020                         $dbw->query( "UPDATE $site_stats SET ss_images=ss_images-1", __METHOD__ );
1021                         $this->purgeEverything();
1022                 }
1023
1024                 $this->unlock();
1025                 return $status;
1026         }
1027
1028         /**
1029          * Delete an old version of the file.
1030          *
1031          * Moves the file into an archive directory (or deletes it)
1032          * and removes the database row.
1033          *
1034          * Cache purging is done; logging is caller's responsibility.
1035          *
1036          * @param $reason
1037          * @param $suppress
1038          * @throws MWException or FSException on database or filestore failure
1039          * @return FileRepoStatus object.
1040          */
1041         function deleteOld( $archiveName, $reason, $suppress=false ) {
1042                 $this->lock();
1043                 $batch = new LocalFileDeleteBatch( $this, $reason, $suppress );
1044                 $batch->addOld( $archiveName );
1045                 $status = $batch->execute();
1046                 $this->unlock();
1047                 if ( $status->ok ) {
1048                         $this->purgeDescription();
1049                         $this->purgeHistory();
1050                 }
1051                 return $status;
1052         }
1053
1054         /**
1055          * Restore all or specified deleted revisions to the given file.
1056          * Permissions and logging are left to the caller.
1057          *
1058          * May throw database exceptions on error.
1059          *
1060          * @param $versions set of record ids of deleted items to restore,
1061          *                    or empty to restore all revisions.
1062          * @param $unuppress
1063          * @return FileRepoStatus
1064          */
1065         function restore( $versions = array(), $unsuppress = false ) {
1066                 $batch = new LocalFileRestoreBatch( $this, $unsuppress );
1067                 if ( !$versions ) {
1068                         $batch->addAll();
1069                 } else {
1070                         $batch->addIds( $versions );
1071                 }
1072                 $status = $batch->execute();
1073                 if ( !$status->ok ) {
1074                         return $status;
1075                 }
1076
1077                 $cleanupStatus = $batch->cleanup();
1078                 $cleanupStatus->successCount = 0;
1079                 $cleanupStatus->failCount = 0;
1080                 $status->merge( $cleanupStatus );
1081                 return $status;
1082         }
1083
1084         /** isMultipage inherited */
1085         /** pageCount inherited */
1086         /** scaleHeight inherited */
1087         /** getImageSize inherited */
1088
1089         /**
1090          * Get the URL of the file description page.
1091          */
1092         function getDescriptionUrl() {
1093                 return $this->title->getLocalUrl();
1094         }
1095
1096         /**
1097          * Get the HTML text of the description page
1098          * This is not used by ImagePage for local files, since (among other things)
1099          * it skips the parser cache.
1100          */
1101         function getDescriptionText() {
1102                 global $wgParser;
1103                 $revision = Revision::newFromTitle( $this->title );
1104                 if ( !$revision ) return false;
1105                 $text = $revision->getText();
1106                 if ( !$text ) return false;
1107                 $html = $wgParser->parse( $text, new ParserOptions );
1108                 return $html;
1109         }
1110
1111         function getDescription() {
1112                 $this->load();
1113                 return $this->description;
1114         }
1115
1116         function getTimestamp() {
1117                 $this->load();
1118                 return $this->timestamp;
1119         }
1120
1121         function getSha1() {
1122                 $this->load();
1123                 // Initialise now if necessary
1124                 if ( $this->sha1 == '' && $this->fileExists ) {
1125                         $this->sha1 = File::sha1Base36( $this->getPath() );
1126                         if ( strval( $this->sha1 ) != '' ) {
1127                                 $dbw = $this->repo->getMasterDB();
1128                                 $dbw->update( 'image',
1129                                         array( 'img_sha1' => $this->sha1 ),
1130                                         array( 'img_name' => $this->getName() ),
1131                                         __METHOD__ );
1132                                 $this->saveToCache();
1133                         }
1134                 }
1135
1136                 return $this->sha1;
1137         }
1138
1139         /**
1140          * Start a transaction and lock the image for update
1141          * Increments a reference counter if the lock is already held
1142          * @return boolean True if the image exists, false otherwise
1143          */
1144         function lock() {
1145                 $dbw = $this->repo->getMasterDB();
1146                 if ( !$this->locked ) {
1147                         $dbw->begin();
1148                         $this->locked++;
1149                 }
1150                 return $dbw->selectField( 'image', '1', array( 'img_name' => $this->getName() ), __METHOD__ );
1151         }
1152
1153         /**
1154          * Decrement the lock reference count. If the reference count is reduced to zero, commits
1155          * the transaction and thereby releases the image lock.
1156          */
1157         function unlock() {
1158                 if ( $this->locked ) {
1159                         --$this->locked;
1160                         if ( !$this->locked ) {
1161                                 $dbw = $this->repo->getMasterDB();
1162                                 $dbw->commit();
1163                         }
1164                 }
1165         }
1166
1167         /**
1168          * Roll back the DB transaction and mark the image unlocked
1169          */
1170         function unlockAndRollback() {
1171                 $this->locked = false;
1172                 $dbw = $this->repo->getMasterDB();
1173                 $dbw->rollback();
1174         }
1175 } // LocalFile class
1176
1177 #------------------------------------------------------------------------------
1178
1179 /**
1180  * Helper class for file deletion
1181  * @ingroup FileRepo
1182  */
1183 class LocalFileDeleteBatch {
1184         var $file, $reason, $srcRels = array(), $archiveUrls = array(), $deletionBatch, $suppress;
1185         var $status;
1186
1187         function __construct( File $file, $reason = '', $suppress = false ) {
1188                 $this->file = $file;
1189                 $this->reason = $reason;
1190                 $this->suppress = $suppress;
1191                 $this->status = $file->repo->newGood();
1192         }
1193
1194         function addCurrent() {
1195                 $this->srcRels['.'] = $this->file->getRel();
1196         }
1197
1198         function addOld( $oldName ) {
1199                 $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName );
1200                 $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName );
1201         }
1202
1203         function getOldRels() {
1204                 if ( !isset( $this->srcRels['.'] ) ) {
1205                         $oldRels =& $this->srcRels;
1206                         $deleteCurrent = false;
1207                 } else {
1208                         $oldRels = $this->srcRels;
1209                         unset( $oldRels['.'] );
1210                         $deleteCurrent = true;
1211                 }
1212                 return array( $oldRels, $deleteCurrent );
1213         }
1214
1215         /*protected*/ function getHashes() {
1216                 $hashes = array();
1217                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1218                 if ( $deleteCurrent ) {
1219                         $hashes['.'] = $this->file->getSha1();
1220                 }
1221                 if ( count( $oldRels ) ) {
1222                         $dbw = $this->file->repo->getMasterDB();
1223                         $res = $dbw->select( 'oldimage', array( 'oi_archive_name', 'oi_sha1' ),
1224                                 'oi_archive_name IN(' . $dbw->makeList( array_keys( $oldRels ) ) . ')',
1225                                 __METHOD__ );
1226                         while ( $row = $dbw->fetchObject( $res ) ) {
1227                                 if ( rtrim( $row->oi_sha1, "\0" ) === '' ) {
1228                                         // Get the hash from the file
1229                                         $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name );
1230                                         $props = $this->file->repo->getFileProps( $oldUrl );
1231                                         if ( $props['fileExists'] ) {
1232                                                 // Upgrade the oldimage row
1233                                                 $dbw->update( 'oldimage',
1234                                                         array( 'oi_sha1' => $props['sha1'] ),
1235                                                         array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ),
1236                                                         __METHOD__ );
1237                                                 $hashes[$row->oi_archive_name] = $props['sha1'];
1238                                         } else {
1239                                                 $hashes[$row->oi_archive_name] = false;
1240                                         }
1241                                 } else {
1242                                         $hashes[$row->oi_archive_name] = $row->oi_sha1;
1243                                 }
1244                         }
1245                 }
1246                 $missing = array_diff_key( $this->srcRels, $hashes );
1247                 foreach ( $missing as $name => $rel ) {
1248                         $this->status->error( 'filedelete-old-unregistered', $name );
1249                 }
1250                 foreach ( $hashes as $name => $hash ) {
1251                         if ( !$hash ) {
1252                                 $this->status->error( 'filedelete-missing', $this->srcRels[$name] );
1253                                 unset( $hashes[$name] );
1254                         }
1255                 }
1256
1257                 return $hashes;
1258         }
1259
1260         function doDBInserts() {
1261                 global $wgUser;
1262                 $dbw = $this->file->repo->getMasterDB();
1263                 $encTimestamp = $dbw->addQuotes( $dbw->timestamp() );
1264                 $encUserId = $dbw->addQuotes( $wgUser->getId() );
1265                 $encReason = $dbw->addQuotes( $this->reason );
1266                 $encGroup = $dbw->addQuotes( 'deleted' );
1267                 $ext = $this->file->getExtension();
1268                 $dotExt = $ext === '' ? '' : ".$ext";
1269                 $encExt = $dbw->addQuotes( $dotExt );
1270                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1271
1272                 // Bitfields to further suppress the content
1273                 if ( $this->suppress ) {
1274                         $bitfield = 0;
1275                         // This should be 15...
1276                         $bitfield |= Revision::DELETED_TEXT;
1277                         $bitfield |= Revision::DELETED_COMMENT;
1278                         $bitfield |= Revision::DELETED_USER;
1279                         $bitfield |= Revision::DELETED_RESTRICTED;
1280                 } else {
1281                         $bitfield = 'oi_deleted';
1282                 }
1283
1284                 if ( $deleteCurrent ) {
1285                         $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) );
1286                         $where = array( 'img_name' => $this->file->getName() );
1287                         $dbw->insertSelect( 'filearchive', 'image',
1288                                 array(
1289                                         'fa_storage_group' => $encGroup,
1290                                         'fa_storage_key'   => "CASE WHEN img_sha1='' THEN '' ELSE $concat END",
1291                                         'fa_deleted_user'      => $encUserId,
1292                                         'fa_deleted_timestamp' => $encTimestamp,
1293                                         'fa_deleted_reason'    => $encReason,
1294                                         'fa_deleted'               => $this->suppress ? $bitfield : 0,
1295
1296                                         'fa_name'         => 'img_name',
1297                                         'fa_archive_name' => 'NULL',
1298                                         'fa_size'         => 'img_size',
1299                                         'fa_width'        => 'img_width',
1300                                         'fa_height'       => 'img_height',
1301                                         'fa_metadata'     => 'img_metadata',
1302                                         'fa_bits'         => 'img_bits',
1303                                         'fa_media_type'   => 'img_media_type',
1304                                         'fa_major_mime'   => 'img_major_mime',
1305                                         'fa_minor_mime'   => 'img_minor_mime',
1306                                         'fa_description'  => 'img_description',
1307                                         'fa_user'         => 'img_user',
1308                                         'fa_user_text'    => 'img_user_text',
1309                                         'fa_timestamp'    => 'img_timestamp'
1310                                 ), $where, __METHOD__ );
1311                 }
1312
1313                 if ( count( $oldRels ) ) {
1314                         $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) );
1315                         $where = array(
1316                                 'oi_name' => $this->file->getName(),
1317                                 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')' );
1318                         $dbw->insertSelect( 'filearchive', 'oldimage',
1319                                 array(
1320                                         'fa_storage_group' => $encGroup,
1321                                         'fa_storage_key'   => "CASE WHEN oi_sha1='' THEN '' ELSE $concat END",
1322                                         'fa_deleted_user'      => $encUserId,
1323                                         'fa_deleted_timestamp' => $encTimestamp,
1324                                         'fa_deleted_reason'    => $encReason,
1325                                         'fa_deleted'               => $this->suppress ? $bitfield : 'oi_deleted',
1326
1327                                         'fa_name'         => 'oi_name',
1328                                         'fa_archive_name' => 'oi_archive_name',
1329                                         'fa_size'         => 'oi_size',
1330                                         'fa_width'        => 'oi_width',
1331                                         'fa_height'       => 'oi_height',
1332                                         'fa_metadata'     => 'oi_metadata',
1333                                         'fa_bits'         => 'oi_bits',
1334                                         'fa_media_type'   => 'oi_media_type',
1335                                         'fa_major_mime'   => 'oi_major_mime',
1336                                         'fa_minor_mime'   => 'oi_minor_mime',
1337                                         'fa_description'  => 'oi_description',
1338                                         'fa_user'         => 'oi_user',
1339                                         'fa_user_text'    => 'oi_user_text',
1340                                         'fa_timestamp'    => 'oi_timestamp',
1341                                         'fa_deleted'      => $bitfield
1342                                 ), $where, __METHOD__ );
1343                 }
1344         }
1345
1346         function doDBDeletes() {
1347                 $dbw = $this->file->repo->getMasterDB();
1348                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1349                 if ( count( $oldRels ) ) {
1350                         $dbw->delete( 'oldimage',
1351                                 array(
1352                                         'oi_name' => $this->file->getName(),
1353                                         'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')'
1354                                 ), __METHOD__ );
1355                 }
1356                 if ( $deleteCurrent ) {
1357                         $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ );
1358                 }
1359         }
1360
1361         /**
1362          * Run the transaction
1363          */
1364         function execute() {
1365                 global $wgUser, $wgUseSquid;
1366                 wfProfileIn( __METHOD__ );
1367
1368                 $this->file->lock();
1369                 // Leave private files alone
1370                 $privateFiles = array();
1371                 list( $oldRels, $deleteCurrent ) = $this->getOldRels();
1372                 $dbw = $this->file->repo->getMasterDB();
1373                 if( !empty( $oldRels ) ) {
1374                         $res = $dbw->select( 'oldimage',
1375                                 array( 'oi_archive_name' ),
1376                                 array( 'oi_name' => $this->file->getName(),
1377                                         'oi_archive_name IN (' . $dbw->makeList( array_keys($oldRels) ) . ')',
1378                                         'oi_deleted & ' . File::DELETED_FILE => File::DELETED_FILE ),
1379                                 __METHOD__ );
1380                         while( $row = $dbw->fetchObject( $res ) ) {
1381                                 $privateFiles[$row->oi_archive_name] = 1;
1382                         }
1383                 }
1384                 // Prepare deletion batch
1385                 $hashes = $this->getHashes();
1386                 $this->deletionBatch = array();
1387                 $ext = $this->file->getExtension();
1388                 $dotExt = $ext === '' ? '' : ".$ext";
1389                 foreach ( $this->srcRels as $name => $srcRel ) {
1390                         // Skip files that have no hash (missing source).
1391                         // Keep private files where they are.
1392                         if ( isset($hashes[$name]) && !array_key_exists($name,$privateFiles) ) {
1393                                 $hash = $hashes[$name];
1394                                 $key = $hash . $dotExt;
1395                                 $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key;
1396                                 $this->deletionBatch[$name] = array( $srcRel, $dstRel );
1397                         }
1398                 }
1399
1400                 // Lock the filearchive rows so that the files don't get deleted by a cleanup operation
1401                 // We acquire this lock by running the inserts now, before the file operations.
1402                 //
1403                 // This potentially has poor lock contention characteristics -- an alternative
1404                 // scheme would be to insert stub filearchive entries with no fa_name and commit
1405                 // them in a separate transaction, then run the file ops, then update the fa_name fields.
1406                 $this->doDBInserts();
1407
1408                 // Execute the file deletion batch
1409                 $status = $this->file->repo->deleteBatch( $this->deletionBatch );
1410                 if ( !$status->isGood() ) {
1411                         $this->status->merge( $status );
1412                 }
1413
1414                 if ( !$this->status->ok ) {
1415                         // Critical file deletion error
1416                         // Roll back inserts, release lock and abort
1417                         // TODO: delete the defunct filearchive rows if we are using a non-transactional DB
1418                         $this->file->unlockAndRollback();
1419                         return $this->status;
1420                 }
1421
1422                 // Purge squid
1423                 if ( $wgUseSquid ) {
1424                         $urls = array();
1425                         foreach ( $this->srcRels as $srcRel ) {
1426                                 $urlRel = str_replace( '%2F', '/', rawurlencode( $srcRel ) );
1427                                 $urls[] = $this->file->repo->getZoneUrl( 'public' ) . '/' . $urlRel;
1428                         }
1429                         SquidUpdate::purge( $urls );
1430                 }
1431
1432                 // Delete image/oldimage rows
1433                 $this->doDBDeletes();
1434
1435                 // Commit and return
1436                 $this->file->unlock();
1437                 wfProfileOut( __METHOD__ );
1438                 return $this->status;
1439         }
1440 }
1441
1442 #------------------------------------------------------------------------------
1443
1444 /**
1445  * Helper class for file undeletion
1446  * @ingroup FileRepo
1447  */
1448 class LocalFileRestoreBatch {
1449         var $file, $cleanupBatch, $ids, $all, $unsuppress = false;
1450
1451         function __construct( File $file, $unsuppress = false ) {
1452                 $this->file = $file;
1453                 $this->cleanupBatch = $this->ids = array();
1454                 $this->ids = array();
1455                 $this->unsuppress = $unsuppress;
1456         }
1457
1458         /**
1459          * Add a file by ID
1460          */
1461         function addId( $fa_id ) {
1462                 $this->ids[] = $fa_id;
1463         }
1464
1465         /**
1466          * Add a whole lot of files by ID
1467          */
1468         function addIds( $ids ) {
1469                 $this->ids = array_merge( $this->ids, $ids );
1470         }
1471
1472         /**
1473          * Add all revisions of the file
1474          */
1475         function addAll() {
1476                 $this->all = true;
1477         }
1478
1479         /**
1480          * Run the transaction, except the cleanup batch.
1481          * The cleanup batch should be run in a separate transaction, because it locks different
1482          * rows and there's no need to keep the image row locked while it's acquiring those locks
1483          * The caller may have its own transaction open.
1484          * So we save the batch and let the caller call cleanup()
1485          */
1486         function execute() {
1487                 global $wgUser, $wgLang;
1488                 if ( !$this->all && !$this->ids ) {
1489                         // Do nothing
1490                         return $this->file->repo->newGood();
1491                 }
1492
1493                 $exists = $this->file->lock();
1494                 $dbw = $this->file->repo->getMasterDB();
1495                 $status = $this->file->repo->newGood();
1496
1497                 // Fetch all or selected archived revisions for the file,
1498                 // sorted from the most recent to the oldest.
1499                 $conditions = array( 'fa_name' => $this->file->getName() );
1500                 if( !$this->all ) {
1501                         $conditions[] = 'fa_id IN (' . $dbw->makeList( $this->ids ) . ')';
1502                 }
1503
1504                 $result = $dbw->select( 'filearchive', '*',
1505                         $conditions,
1506                         __METHOD__,
1507                         array( 'ORDER BY' => 'fa_timestamp DESC' ) );
1508
1509                 $idsPresent = array();
1510                 $storeBatch = array();
1511                 $insertBatch = array();
1512                 $insertCurrent = false;
1513                 $deleteIds = array();
1514                 $first = true;
1515                 $archiveNames = array();
1516                 while( $row = $dbw->fetchObject( $result ) ) {
1517                         $idsPresent[] = $row->fa_id;
1518
1519                         if ( $row->fa_name != $this->file->getName() ) {
1520                                 $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) );
1521                                 $status->failCount++;
1522                                 continue;
1523                         }
1524                         if ( $row->fa_storage_key == '' ) {
1525                                 // Revision was missing pre-deletion
1526                                 $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) );
1527                                 $status->failCount++;
1528                                 continue;
1529                         }
1530
1531                         $deletedRel = $this->file->repo->getDeletedHashPath( $row->fa_storage_key ) . $row->fa_storage_key;
1532                         $deletedUrl = $this->file->repo->getVirtualUrl() . '/deleted/' . $deletedRel;
1533
1534                         $sha1 = substr( $row->fa_storage_key, 0, strcspn( $row->fa_storage_key, '.' ) );
1535                         # Fix leading zero
1536                         if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) {
1537                                 $sha1 = substr( $sha1, 1 );
1538                         }
1539
1540                         if( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown'
1541                                 || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown'
1542                                 || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN'
1543                                 || is_null( $row->fa_metadata ) ) {
1544                                 // Refresh our metadata
1545                                 // Required for a new current revision; nice for older ones too. :)
1546                                 $props = RepoGroup::singleton()->getFileProps( $deletedUrl );
1547                         } else {
1548                                 $props = array(
1549                                         'minor_mime' => $row->fa_minor_mime,
1550                                         'major_mime' => $row->fa_major_mime,
1551                                         'media_type' => $row->fa_media_type,
1552                                         'metadata' => $row->fa_metadata );
1553                         }
1554
1555                         if ( $first && !$exists ) {
1556                                 // The live (current) version cannot be hidden!
1557                                 if( !$this->unsuppress && $row->fa_deleted ) {
1558                                         $this->file->unlock();
1559                                         return $status;
1560                                 }
1561                                 // This revision will be published as the new current version
1562                                 $destRel = $this->file->getRel();
1563                                 $insertCurrent = array(
1564                                         'img_name'        => $row->fa_name,
1565                                         'img_size'        => $row->fa_size,
1566                                         'img_width'       => $row->fa_width,
1567                                         'img_height'      => $row->fa_height,
1568                                         'img_metadata'    => $props['metadata'],
1569                                         'img_bits'        => $row->fa_bits,
1570                                         'img_media_type'  => $props['media_type'],
1571                                         'img_major_mime'  => $props['major_mime'],
1572                                         'img_minor_mime'  => $props['minor_mime'],
1573                                         'img_description' => $row->fa_description,
1574                                         'img_user'        => $row->fa_user,
1575                                         'img_user_text'   => $row->fa_user_text,
1576                                         'img_timestamp'   => $row->fa_timestamp,
1577                                         'img_sha1'        => $sha1);
1578                         } else {
1579                                 $archiveName = $row->fa_archive_name;
1580                                 if( $archiveName == '' ) {
1581                                         // This was originally a current version; we
1582                                         // have to devise a new archive name for it.
1583                                         // Format is <timestamp of archiving>!<name>
1584                                         $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp );
1585                                         do {
1586                                                 $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name;
1587                                                 $timestamp++;
1588                                         } while ( isset( $archiveNames[$archiveName] ) );
1589                                 }
1590                                 $archiveNames[$archiveName] = true;
1591                                 $destRel = $this->file->getArchiveRel( $archiveName );
1592                                 $insertBatch[] = array(
1593                                         'oi_name'         => $row->fa_name,
1594                                         'oi_archive_name' => $archiveName,
1595                                         'oi_size'         => $row->fa_size,
1596                                         'oi_width'        => $row->fa_width,
1597                                         'oi_height'       => $row->fa_height,
1598                                         'oi_bits'         => $row->fa_bits,
1599                                         'oi_description'  => $row->fa_description,
1600                                         'oi_user'         => $row->fa_user,
1601                                         'oi_user_text'    => $row->fa_user_text,
1602                                         'oi_timestamp'    => $row->fa_timestamp,
1603                                         'oi_metadata'     => $props['metadata'],
1604                                         'oi_media_type'   => $props['media_type'],
1605                                         'oi_major_mime'   => $props['major_mime'],
1606                                         'oi_minor_mime'   => $props['minor_mime'],
1607                                         'oi_deleted'      => $this->unsuppress ? 0 : $row->fa_deleted,
1608                                         'oi_sha1'         => $sha1 );
1609                         }
1610
1611                         $deleteIds[] = $row->fa_id;
1612                         if( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) {
1613                                 // private files can stay where they are
1614                         } else {
1615                                 $storeBatch[] = array( $deletedUrl, 'public', $destRel );
1616                                 $this->cleanupBatch[] = $row->fa_storage_key;
1617                         }
1618                         $first = false;
1619                 }
1620                 unset( $result );
1621
1622                 // Add a warning to the status object for missing IDs
1623                 $missingIds = array_diff( $this->ids, $idsPresent );
1624                 foreach ( $missingIds as $id ) {
1625                         $status->error( 'undelete-missing-filearchive', $id );
1626                 }
1627
1628                 // Run the store batch
1629                 // Use the OVERWRITE_SAME flag to smooth over a common error
1630                 $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME );
1631                 $status->merge( $storeStatus );
1632
1633                 if ( !$status->ok ) {
1634                         // Store batch returned a critical error -- this usually means nothing was stored
1635                         // Stop now and return an error
1636                         $this->file->unlock();
1637                         return $status;
1638                 }
1639
1640                 // Run the DB updates
1641                 // Because we have locked the image row, key conflicts should be rare.
1642                 // If they do occur, we can roll back the transaction at this time with
1643                 // no data loss, but leaving unregistered files scattered throughout the
1644                 // public zone.
1645                 // This is not ideal, which is why it's important to lock the image row.
1646                 if ( $insertCurrent ) {
1647                         $dbw->insert( 'image', $insertCurrent, __METHOD__ );
1648                 }
1649                 if ( $insertBatch ) {
1650                         $dbw->insert( 'oldimage', $insertBatch, __METHOD__ );
1651                 }
1652                 if ( $deleteIds ) {
1653                         $dbw->delete( 'filearchive',
1654                                 array( 'fa_id IN (' . $dbw->makeList( $deleteIds ) . ')' ),
1655                                 __METHOD__ );
1656                 }
1657
1658                 if( $status->successCount > 0 ) {
1659                         if( !$exists ) {
1660                                 wfDebug( __METHOD__." restored {$status->successCount} items, creating a new current\n" );
1661
1662                                 // Update site_stats
1663                                 $site_stats = $dbw->tableName( 'site_stats' );
1664                                 $dbw->query( "UPDATE $site_stats SET ss_images=ss_images+1", __METHOD__ );
1665
1666                                 $this->file->purgeEverything();
1667                         } else {
1668                                 wfDebug( __METHOD__." restored {$status->successCount} as archived versions\n" );
1669                                 $this->file->purgeDescription();
1670                                 $this->file->purgeHistory();
1671                         }
1672                 }
1673                 $this->file->unlock();
1674                 return $status;
1675         }
1676
1677         /**
1678          * Delete unused files in the deleted zone.
1679          * This should be called from outside the transaction in which execute() was called.
1680          */
1681         function cleanup() {
1682                 if ( !$this->cleanupBatch ) {
1683                         return $this->file->repo->newGood();
1684                 }
1685                 $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch );
1686                 return $status;
1687         }
1688 }
1689
1690 #------------------------------------------------------------------------------
1691
1692 /**
1693  * Helper class for file movement
1694  * @ingroup FileRepo
1695  */
1696 class LocalFileMoveBatch {
1697         var $file, $cur, $olds, $oldcount, $archive, $thumbs, $target, $db;
1698
1699         function __construct( File $file, Title $target, Database $db ) {
1700                 $this->file = $file;
1701                 $this->target = $target;
1702                 $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() );
1703                 $this->newHash = $this->file->repo->getHashPath( $this->target->getDbKey() );
1704                 $this->oldName = $this->file->getName();
1705                 $this->newName = $this->file->repo->getNameFromTitle( $this->target );
1706                 $this->oldRel = $this->oldHash . $this->oldName;
1707                 $this->newRel = $this->newHash . $this->newName;
1708                 $this->db = $db;
1709         }
1710
1711         function addCurrent() {
1712                 $this->cur = array( $this->oldRel, $this->newRel );
1713         }
1714
1715         function addThumbs() {
1716                 // Thumbnails are purged, so no need to move them
1717                 $this->thumbs = array();
1718         }
1719
1720         function addOlds() {
1721                 $archiveBase = 'archive';
1722                 $this->olds = array();
1723                 $this->oldcount = 0;
1724
1725                 $result = $this->db->select( 'oldimage',
1726                         array( 'oi_archive_name', 'oi_deleted' ),
1727                         array( 'oi_name' => $this->oldName ),
1728                         __METHOD__
1729                 );
1730                 while( $row = $this->db->fetchObject( $result ) ) {
1731                         $oldname = $row->oi_archive_name;
1732                         $bits = explode( '!', $oldname, 2 );
1733                         if( count( $bits ) != 2 ) {
1734                                 wfDebug( 'Invalid old file name: ' . $oldname );
1735                                 continue;
1736                         }
1737                         list( $timestamp, $filename ) = $bits;
1738                         if( $this->oldName != $filename ) {
1739                                 wfDebug( 'Invalid old file name:' . $oldName );
1740                                 continue;
1741                         }
1742                         $this->oldcount++;
1743                         // Do we want to add those to oldcount?
1744                         if( $row->oi_deleted & File::DELETED_FILE ) {
1745                                 continue;
1746                         }
1747                         $this->olds[] = array(
1748                                 "{$archiveBase}/{$this->oldHash}{$oldname}",
1749                                 "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}"
1750                         );
1751                 }
1752                 $this->db->freeResult( $result );
1753         }
1754
1755         function execute() {
1756                 $repo = $this->file->repo;
1757                 $status = $repo->newGood();
1758                 $triplets = $this->getMoveTriplets();
1759
1760                 $statusDb = $this->doDBUpdates();
1761                 $statusMove = $repo->storeBatch( $triplets, FSRepo::DELETE_SOURCE );
1762                 if( !$statusMove->isOk() ) {
1763                         $this->db->rollback();
1764                 }
1765                 $status->merge( $statusDb );
1766                 $status->merge( $statusMove );
1767                 return $status;
1768         }
1769
1770         function doDBUpdates() {
1771                 $repo = $this->file->repo;
1772                 $status = $repo->newGood();
1773                 $dbw = $this->db;
1774
1775                 // Update current image
1776                 $dbw->update(
1777                         'image',
1778                         array( 'img_name' => $this->newName ),
1779                         array( 'img_name' => $this->oldName ),
1780                         __METHOD__
1781                 );
1782                 if( $dbw->affectedRows() ) {
1783                         $status->successCount++;
1784                 } else {
1785                         $status->failCount++;
1786                 }
1787
1788                 // Update old images
1789                 $dbw->update(
1790                         'oldimage',
1791                         array(
1792                                 'oi_name' => $this->newName,
1793                                 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name', $dbw->addQuotes($this->oldName), $dbw->addQuotes($this->newName) ),
1794                         ),
1795                         array( 'oi_name' => $this->oldName ),
1796                         __METHOD__
1797                 );
1798                 $affected = $dbw->affectedRows();
1799                 $total = $this->oldcount;
1800                 $status->successCount += $affected;
1801                 $status->failCount += $total - $affected;
1802
1803                 return $status;
1804         }
1805
1806         // Generates triplets for FSRepo::storeBatch()
1807         function getMoveTriplets() {
1808                 $moves = array_merge( array( $this->cur ), $this->olds, $this->thumbs );
1809                 $triplets = array();    // The format is: (srcUrl, destZone, destUrl)
1810                 foreach( $moves as $move ) {
1811                         // $move: (oldRelativePath, newRelativePath)
1812                         $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] );
1813                         $triplets[] = array( $srcUrl, 'public', $move[1] );
1814                 }
1815                 return $triplets;
1816         }
1817 }