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Diffstat (limited to 'includes/filerepo/file/LocalFile.php')
| -rw-r--r-- | includes/filerepo/file/LocalFile.php | 2344 |
1 files changed, 2344 insertions, 0 deletions
diff --git a/includes/filerepo/file/LocalFile.php b/includes/filerepo/file/LocalFile.php new file mode 100644 index 00000000..0f8b4754 --- /dev/null +++ b/includes/filerepo/file/LocalFile.php @@ -0,0 +1,2344 @@ +<?php +/** + * Local file in the wiki's own database + * + * @file + * @ingroup FileAbstraction + */ + +/** + * Bump this number when serialized cache records may be incompatible. + */ +define( 'MW_FILE_VERSION', 8 ); + +/** + * Class to represent a local file in the wiki's own database + * + * Provides methods to retrieve paths (physical, logical, URL), + * to generate image thumbnails or for uploading. + * + * Note that only the repo object knows what its file class is called. You should + * never name a file class explictly outside of the repo class. Instead use the + * repo's factory functions to generate file objects, for example: + * + * RepoGroup::singleton()->getLocalRepo()->newFile($title); + * + * The convenience functions wfLocalFile() and wfFindFile() should be sufficient + * in most cases. + * + * @ingroup FileAbstraction + */ +class LocalFile extends File { + /**#@+ + * @private + */ + var + $fileExists, # does the file exist on disk? (loadFromXxx) + $historyLine, # Number of line to return by nextHistoryLine() (constructor) + $historyRes, # result of the query for the file's history (nextHistoryLine) + $width, # \ + $height, # | + $bits, # --- returned by getimagesize (loadFromXxx) + $attr, # / + $media_type, # MEDIATYPE_xxx (bitmap, drawing, audio...) + $mime, # MIME type, determined by MimeMagic::guessMimeType + $major_mime, # Major mime type + $minor_mime, # Minor mime type + $size, # Size in bytes (loadFromXxx) + $metadata, # Handler-specific metadata + $timestamp, # Upload timestamp + $sha1, # SHA-1 base 36 content hash + $user, $user_text, # User, who uploaded the file + $description, # Description of current revision of the file + $dataLoaded, # Whether or not all this has been loaded from the database (loadFromXxx) + $upgraded, # Whether the row was upgraded on load + $locked, # True if the image row is locked + $missing, # True if file is not present in file system. Not to be cached in memcached + $deleted; # Bitfield akin to rev_deleted + + /**#@-*/ + + protected $repoClass = 'LocalRepo'; + + /** + * Create a LocalFile from a title + * Do not call this except from inside a repo class. + * + * Note: $unused param is only here to avoid an E_STRICT + * + * @param $title + * @param $repo + * @param $unused + * + * @return LocalFile + */ + static function newFromTitle( $title, $repo, $unused = null ) { + return new self( $title, $repo ); + } + + /** + * Create a LocalFile from a title + * Do not call this except from inside a repo class. + * + * @param $row + * @param $repo + * + * @return LocalFile + */ + static function newFromRow( $row, $repo ) { + $title = Title::makeTitle( NS_FILE, $row->img_name ); + $file = new self( $title, $repo ); + $file->loadFromRow( $row ); + + return $file; + } + + /** + * Create a LocalFile from a SHA-1 key + * Do not call this except from inside a repo class. + * + * @param $sha1 string base-36 SHA-1 + * @param $repo LocalRepo + * @param string|bool $timestamp MW_timestamp (optional) + * + * @return bool|LocalFile + */ + static function newFromKey( $sha1, $repo, $timestamp = false ) { + $dbr = $repo->getSlaveDB(); + + $conds = array( 'img_sha1' => $sha1 ); + if ( $timestamp ) { + $conds['img_timestamp'] = $dbr->timestamp( $timestamp ); + } + + $row = $dbr->selectRow( 'image', self::selectFields(), $conds, __METHOD__ ); + if ( $row ) { + return self::newFromRow( $row, $repo ); + } else { + return false; + } + } + + /** + * Fields in the image table + */ + static function selectFields() { + return array( + 'img_name', + 'img_size', + 'img_width', + 'img_height', + 'img_metadata', + 'img_bits', + 'img_media_type', + 'img_major_mime', + 'img_minor_mime', + 'img_description', + 'img_user', + 'img_user_text', + 'img_timestamp', + 'img_sha1', + ); + } + + /** + * Constructor. + * Do not call this except from inside a repo class. + */ + function __construct( $title, $repo ) { + parent::__construct( $title, $repo ); + + $this->metadata = ''; + $this->historyLine = 0; + $this->historyRes = null; + $this->dataLoaded = false; + + $this->assertRepoDefined(); + $this->assertTitleDefined(); + } + + /** + * Get the memcached key for the main data for this file, or false if + * there is no access to the shared cache. + */ + function getCacheKey() { + $hashedName = md5( $this->getName() ); + + return $this->repo->getSharedCacheKey( 'file', $hashedName ); + } + + /** + * Try to load file metadata from memcached. Returns true on success. + */ + function loadFromCache() { + global $wgMemc; + + wfProfileIn( __METHOD__ ); + $this->dataLoaded = false; + $key = $this->getCacheKey(); + + if ( !$key ) { + wfProfileOut( __METHOD__ ); + return false; + } + + $cachedValues = $wgMemc->get( $key ); + + // Check if the key existed and belongs to this version of MediaWiki + if ( isset( $cachedValues['version'] ) && ( $cachedValues['version'] == MW_FILE_VERSION ) ) { + wfDebug( "Pulling file metadata from cache key $key\n" ); + $this->fileExists = $cachedValues['fileExists']; + if ( $this->fileExists ) { + $this->setProps( $cachedValues ); + } + $this->dataLoaded = true; + } + + if ( $this->dataLoaded ) { + wfIncrStats( 'image_cache_hit' ); + } else { + wfIncrStats( 'image_cache_miss' ); + } + + wfProfileOut( __METHOD__ ); + return $this->dataLoaded; + } + + /** + * Save the file metadata to memcached + */ + function saveToCache() { + global $wgMemc; + + $this->load(); + $key = $this->getCacheKey(); + + if ( !$key ) { + return; + } + + $fields = $this->getCacheFields( '' ); + $cache = array( 'version' => MW_FILE_VERSION ); + $cache['fileExists'] = $this->fileExists; + + if ( $this->fileExists ) { + foreach ( $fields as $field ) { + $cache[$field] = $this->$field; + } + } + + $wgMemc->set( $key, $cache, 60 * 60 * 24 * 7 ); // A week + } + + /** + * Load metadata from the file itself + */ + function loadFromFile() { + $props = $this->repo->getFileProps( $this->getVirtualUrl() ); + $this->setProps( $props ); + } + + function getCacheFields( $prefix = 'img_' ) { + static $fields = array( 'size', 'width', 'height', 'bits', 'media_type', + 'major_mime', 'minor_mime', 'metadata', 'timestamp', 'sha1', 'user', 'user_text', 'description' ); + static $results = array(); + + if ( $prefix == '' ) { + return $fields; + } + + if ( !isset( $results[$prefix] ) ) { + $prefixedFields = array(); + foreach ( $fields as $field ) { + $prefixedFields[] = $prefix . $field; + } + $results[$prefix] = $prefixedFields; + } + + return $results[$prefix]; + } + + /** + * Load file metadata from the DB + */ + function loadFromDB() { + # Polymorphic function name to distinguish foreign and local fetches + $fname = get_class( $this ) . '::' . __FUNCTION__; + wfProfileIn( $fname ); + + # Unconditionally set loaded=true, we don't want the accessors constantly rechecking + $this->dataLoaded = true; + + $dbr = $this->repo->getMasterDB(); + + $row = $dbr->selectRow( 'image', $this->getCacheFields( 'img_' ), + array( 'img_name' => $this->getName() ), $fname ); + + if ( $row ) { + $this->loadFromRow( $row ); + } else { + $this->fileExists = false; + } + + wfProfileOut( $fname ); + } + + /** + * Decode a row from the database (either object or array) to an array + * with timestamps and MIME types decoded, and the field prefix removed. + */ + function decodeRow( $row, $prefix = 'img_' ) { + $array = (array)$row; + $prefixLength = strlen( $prefix ); + + // Sanity check prefix once + if ( substr( key( $array ), 0, $prefixLength ) !== $prefix ) { + throw new MWException( __METHOD__ . ': incorrect $prefix parameter' ); + } + + $decoded = array(); + + foreach ( $array as $name => $value ) { + $decoded[substr( $name, $prefixLength )] = $value; + } + + $decoded['timestamp'] = wfTimestamp( TS_MW, $decoded['timestamp'] ); + + if ( empty( $decoded['major_mime'] ) ) { + $decoded['mime'] = 'unknown/unknown'; + } else { + if ( !$decoded['minor_mime'] ) { + $decoded['minor_mime'] = 'unknown'; + } + $decoded['mime'] = $decoded['major_mime'] . '/' . $decoded['minor_mime']; + } + + # Trim zero padding from char/binary field + $decoded['sha1'] = rtrim( $decoded['sha1'], "\0" ); + + return $decoded; + } + + /** + * Load file metadata from a DB result row + */ + function loadFromRow( $row, $prefix = 'img_' ) { + $this->dataLoaded = true; + $array = $this->decodeRow( $row, $prefix ); + + foreach ( $array as $name => $value ) { + $this->$name = $value; + } + + $this->fileExists = true; + $this->maybeUpgradeRow(); + } + + /** + * Load file metadata from cache or DB, unless already loaded + */ + function load() { + if ( !$this->dataLoaded ) { + if ( !$this->loadFromCache() ) { + $this->loadFromDB(); + $this->saveToCache(); + } + $this->dataLoaded = true; + } + } + + /** + * Upgrade a row if it needs it + */ + function maybeUpgradeRow() { + global $wgUpdateCompatibleMetadata; + if ( wfReadOnly() ) { + return; + } + + if ( is_null( $this->media_type ) || + $this->mime == 'image/svg' + ) { + $this->upgradeRow(); + $this->upgraded = true; + } else { + $handler = $this->getHandler(); + if ( $handler ) { + $validity = $handler->isMetadataValid( $this, $this->metadata ); + if ( $validity === MediaHandler::METADATA_BAD + || ( $validity === MediaHandler::METADATA_COMPATIBLE && $wgUpdateCompatibleMetadata ) + ) { + $this->upgradeRow(); + $this->upgraded = true; + } + } + } + } + + function getUpgraded() { + return $this->upgraded; + } + + /** + * Fix assorted version-related problems with the image row by reloading it from the file + */ + function upgradeRow() { + wfProfileIn( __METHOD__ ); + + $this->lock(); // begin + + $this->loadFromFile(); + + # Don't destroy file info of missing files + if ( !$this->fileExists ) { + wfDebug( __METHOD__ . ": file does not exist, aborting\n" ); + wfProfileOut( __METHOD__ ); + return; + } + + $dbw = $this->repo->getMasterDB(); + list( $major, $minor ) = self::splitMime( $this->mime ); + + if ( wfReadOnly() ) { + wfProfileOut( __METHOD__ ); + return; + } + wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema\n" ); + + $dbw->update( 'image', + array( + 'img_width' => $this->width, + 'img_height' => $this->height, + 'img_bits' => $this->bits, + 'img_media_type' => $this->media_type, + 'img_major_mime' => $major, + 'img_minor_mime' => $minor, + 'img_metadata' => $this->metadata, + 'img_sha1' => $this->sha1, + ), + array( 'img_name' => $this->getName() ), + __METHOD__ + ); + + $this->saveToCache(); + + $this->unlock(); // done + + wfProfileOut( __METHOD__ ); + } + + /** + * Set properties in this object to be equal to those given in the + * associative array $info. Only cacheable fields can be set. + * + * If 'mime' is given, it will be split into major_mime/minor_mime. + * If major_mime/minor_mime are given, $this->mime will also be set. + */ + function setProps( $info ) { + $this->dataLoaded = true; + $fields = $this->getCacheFields( '' ); + $fields[] = 'fileExists'; + + foreach ( $fields as $field ) { + if ( isset( $info[$field] ) ) { + $this->$field = $info[$field]; + } + } + + // Fix up mime fields + if ( isset( $info['major_mime'] ) ) { + $this->mime = "{$info['major_mime']}/{$info['minor_mime']}"; + } elseif ( isset( $info['mime'] ) ) { + $this->mime = $info['mime']; + list( $this->major_mime, $this->minor_mime ) = self::splitMime( $this->mime ); + } + } + + /** splitMime inherited */ + /** getName inherited */ + /** getTitle inherited */ + /** getURL inherited */ + /** getViewURL inherited */ + /** getPath inherited */ + /** isVisible inhereted */ + + function isMissing() { + if ( $this->missing === null ) { + list( $fileExists ) = $this->repo->fileExists( $this->getVirtualUrl(), FileRepo::FILES_ONLY ); + $this->missing = !$fileExists; + } + return $this->missing; + } + + /** + * Return the width of the image + * + * Returns false on error + */ + public function getWidth( $page = 1 ) { + $this->load(); + + if ( $this->isMultipage() ) { + $dim = $this->getHandler()->getPageDimensions( $this, $page ); + if ( $dim ) { + return $dim['width']; + } else { + return false; + } + } else { + return $this->width; + } + } + + /** + * Return the height of the image + * + * Returns false on error + */ + public function getHeight( $page = 1 ) { + $this->load(); + + if ( $this->isMultipage() ) { + $dim = $this->getHandler()->getPageDimensions( $this, $page ); + if ( $dim ) { + return $dim['height']; + } else { + return false; + } + } else { + return $this->height; + } + } + + /** + * Returns ID or name of user who uploaded the file + * + * @param $type string 'text' or 'id' + */ + function getUser( $type = 'text' ) { + $this->load(); + + if ( $type == 'text' ) { + return $this->user_text; + } elseif ( $type == 'id' ) { + return $this->user; + } + } + + /** + * Get handler-specific metadata + */ + function getMetadata() { + $this->load(); + return $this->metadata; + } + + function getBitDepth() { + $this->load(); + return $this->bits; + } + + /** + * Return the size of the image file, in bytes + */ + public function getSize() { + $this->load(); + return $this->size; + } + + /** + * Returns the mime type of the file. + */ + function getMimeType() { + $this->load(); + return $this->mime; + } + + /** + * Return the type of the media in the file. + * Use the value returned by this function with the MEDIATYPE_xxx constants. + */ + function getMediaType() { + $this->load(); + return $this->media_type; + } + + /** canRender inherited */ + /** mustRender inherited */ + /** allowInlineDisplay inherited */ + /** isSafeFile inherited */ + /** isTrustedFile inherited */ + + /** + * Returns true if the file exists on disk. + * @return boolean Whether file exist on disk. + */ + public function exists() { + $this->load(); + return $this->fileExists; + } + + /** getTransformScript inherited */ + /** getUnscaledThumb inherited */ + /** thumbName inherited */ + /** createThumb inherited */ + /** transform inherited */ + + /** + * Fix thumbnail files from 1.4 or before, with extreme prejudice + */ + function migrateThumbFile( $thumbName ) { + $thumbDir = $this->getThumbPath(); + + /* Old code for bug 2532 + $thumbPath = "$thumbDir/$thumbName"; + if ( is_dir( $thumbPath ) ) { + // Directory where file should be + // This happened occasionally due to broken migration code in 1.5 + // Rename to broken-* + for ( $i = 0; $i < 100 ; $i++ ) { + $broken = $this->repo->getZonePath( 'public' ) . "/broken-$i-$thumbName"; + if ( !file_exists( $broken ) ) { + rename( $thumbPath, $broken ); + break; + } + } + // Doesn't exist anymore + clearstatcache(); + } + */ + + if ( $this->repo->fileExists( $thumbDir, FileRepo::FILES_ONLY ) ) { + // Delete file where directory should be + $this->repo->cleanupBatch( array( $thumbDir ) ); + } + } + + /** getHandler inherited */ + /** iconThumb inherited */ + /** getLastError inherited */ + + /** + * Get all thumbnail names previously generated for this file + * @param $archiveName string|false Name of an archive file + * @return array first element is the base dir, then files in that base dir. + */ + function getThumbnails( $archiveName = false ) { + $this->load(); + + if ( $archiveName ) { + $dir = $this->getArchiveThumbPath( $archiveName ); + } else { + $dir = $this->getThumbPath(); + } + + $backend = $this->repo->getBackend(); + $files = array( $dir ); + $iterator = $backend->getFileList( array( 'dir' => $dir ) ); + foreach ( $iterator as $file ) { + $files[] = $file; + } + + return $files; + } + + /** + * Refresh metadata in memcached, but don't touch thumbnails or squid + */ + function purgeMetadataCache() { + $this->loadFromDB(); + $this->saveToCache(); + $this->purgeHistory(); + } + + /** + * Purge the shared history (OldLocalFile) cache + */ + function purgeHistory() { + global $wgMemc; + + $hashedName = md5( $this->getName() ); + $oldKey = $this->repo->getSharedCacheKey( 'oldfile', $hashedName ); + + // Must purge thumbnails for old versions too! bug 30192 + foreach( $this->getHistory() as $oldFile ) { + $oldFile->purgeThumbnails(); + } + + if ( $oldKey ) { + $wgMemc->delete( $oldKey ); + } + } + + /** + * Delete all previously generated thumbnails, refresh metadata in memcached and purge the squid + */ + function purgeCache( $options = array() ) { + // Refresh metadata cache + $this->purgeMetadataCache(); + + // Delete thumbnails + $this->purgeThumbnails( $options ); + + // Purge squid cache for this file + SquidUpdate::purge( array( $this->getURL() ) ); + } + + /** + * Delete cached transformed files for an archived version only. + * @param $archiveName string name of the archived file + */ + function purgeOldThumbnails( $archiveName ) { + global $wgUseSquid; + // Get a list of old thumbnails and URLs + $files = $this->getThumbnails( $archiveName ); + $dir = array_shift( $files ); + $this->purgeThumbList( $dir, $files ); + + // Purge any custom thumbnail caches + wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, $archiveName ) ); + + // Purge the squid + if ( $wgUseSquid ) { + $urls = array(); + foreach( $files as $file ) { + $urls[] = $this->getArchiveThumbUrl( $archiveName, $file ); + } + SquidUpdate::purge( $urls ); + } + } + + /** + * Delete cached transformed files for the current version only. + */ + function purgeThumbnails( $options = array() ) { + global $wgUseSquid; + + // Delete thumbnails + $files = $this->getThumbnails(); + + // Give media handler a chance to filter the purge list + if ( !empty( $options['forThumbRefresh'] ) ) { + $handler = $this->getHandler(); + if ( $handler ) { + $handler->filterThumbnailPurgeList( $files, $options ); + } + } + + $dir = array_shift( $files ); + $this->purgeThumbList( $dir, $files ); + + // Purge any custom thumbnail caches + wfRunHooks( 'LocalFilePurgeThumbnails', array( $this, false ) ); + + // Purge the squid + if ( $wgUseSquid ) { + $urls = array(); + foreach( $files as $file ) { + $urls[] = $this->getThumbUrl( $file ); + } + SquidUpdate::purge( $urls ); + } + } + + /** + * Delete a list of thumbnails visible at urls + * @param $dir string base dir of the files. + * @param $files array of strings: relative filenames (to $dir) + */ + protected function purgeThumbList( $dir, $files ) { + $fileListDebug = strtr( + var_export( $files, true ), + array("\n"=>'') + ); + wfDebug( __METHOD__ . ": $fileListDebug\n" ); + + $purgeList = array(); + foreach ( $files as $file ) { + # Check that the base file name is part of the thumb name + # This is a basic sanity check to avoid erasing unrelated directories + if ( strpos( $file, $this->getName() ) !== false ) { + $purgeList[] = "{$dir}/{$file}"; + } + } + + # Delete the thumbnails + $this->repo->cleanupBatch( $purgeList, FileRepo::SKIP_LOCKING ); + # Clear out the thumbnail directory if empty + $this->repo->getBackend()->clean( array( 'dir' => $dir ) ); + } + + /** purgeDescription inherited */ + /** purgeEverything inherited */ + + function getHistory( $limit = null, $start = null, $end = null, $inc = true ) { + $dbr = $this->repo->getSlaveDB(); + $tables = array( 'oldimage' ); + $fields = OldLocalFile::selectFields(); + $conds = $opts = $join_conds = array(); + $eq = $inc ? '=' : ''; + $conds[] = "oi_name = " . $dbr->addQuotes( $this->title->getDBkey() ); + + if ( $start ) { + $conds[] = "oi_timestamp <$eq " . $dbr->addQuotes( $dbr->timestamp( $start ) ); + } + + if ( $end ) { + $conds[] = "oi_timestamp >$eq " . $dbr->addQuotes( $dbr->timestamp( $end ) ); + } + + if ( $limit ) { + $opts['LIMIT'] = $limit; + } + + // Search backwards for time > x queries + $order = ( !$start && $end !== null ) ? 'ASC' : 'DESC'; + $opts['ORDER BY'] = "oi_timestamp $order"; + $opts['USE INDEX'] = array( 'oldimage' => 'oi_name_timestamp' ); + + wfRunHooks( 'LocalFile::getHistory', array( &$this, &$tables, &$fields, + &$conds, &$opts, &$join_conds ) ); + + $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds ); + $r = array(); + + foreach ( $res as $row ) { + if ( $this->repo->oldFileFromRowFactory ) { + $r[] = call_user_func( $this->repo->oldFileFromRowFactory, $row, $this->repo ); + } else { + $r[] = OldLocalFile::newFromRow( $row, $this->repo ); + } + } + + if ( $order == 'ASC' ) { + $r = array_reverse( $r ); // make sure it ends up descending + } + + return $r; + } + + /** + * Return the history of this file, line by line. + * starts with current version, then old versions. + * uses $this->historyLine to check which line to return: + * 0 return line for current version + * 1 query for old versions, return first one + * 2, ... return next old version from above query + */ + public function nextHistoryLine() { + # Polymorphic function name to distinguish foreign and local fetches + $fname = get_class( $this ) . '::' . __FUNCTION__; + + $dbr = $this->repo->getSlaveDB(); + + if ( $this->historyLine == 0 ) {// called for the first time, return line from cur + $this->historyRes = $dbr->select( 'image', + array( + '*', + "'' AS oi_archive_name", + '0 as oi_deleted', + 'img_sha1' + ), + array( 'img_name' => $this->title->getDBkey() ), + $fname + ); + + if ( 0 == $dbr->numRows( $this->historyRes ) ) { + $this->historyRes = null; + return false; + } + } elseif ( $this->historyLine == 1 ) { + $this->historyRes = $dbr->select( 'oldimage', '*', + array( 'oi_name' => $this->title->getDBkey() ), + $fname, + array( 'ORDER BY' => 'oi_timestamp DESC' ) + ); + } + $this->historyLine ++; + + return $dbr->fetchObject( $this->historyRes ); + } + + /** + * Reset the history pointer to the first element of the history + */ + public function resetHistory() { + $this->historyLine = 0; + + if ( !is_null( $this->historyRes ) ) { + $this->historyRes = null; + } + } + + /** getHashPath inherited */ + /** getRel inherited */ + /** getUrlRel inherited */ + /** getArchiveRel inherited */ + /** getArchivePath inherited */ + /** getThumbPath inherited */ + /** getArchiveUrl inherited */ + /** getThumbUrl inherited */ + /** getArchiveVirtualUrl inherited */ + /** getThumbVirtualUrl inherited */ + /** isHashed inherited */ + + /** + * Upload a file and record it in the DB + * @param $srcPath String: source storage path or virtual URL + * @param $comment String: upload description + * @param $pageText String: text to use for the new description page, + * if a new description page is created + * @param $flags Integer: flags for publish() + * @param $props Array: File properties, if known. This can be used to reduce the + * upload time when uploading virtual URLs for which the file info + * is already known + * @param $timestamp String: timestamp for img_timestamp, or false to use the current time + * @param $user Mixed: User object or null to use $wgUser + * + * @return FileRepoStatus object. On success, the value member contains the + * archive name, or an empty string if it was a new file. + */ + function upload( $srcPath, $comment, $pageText, $flags = 0, $props = false, $timestamp = false, $user = null ) { + global $wgContLang; + // truncate nicely or the DB will do it for us + // non-nicely (dangling multi-byte chars, non-truncated + // version in cache). + $comment = $wgContLang->truncate( $comment, 255 ); + $this->lock(); // begin + $status = $this->publish( $srcPath, $flags ); + + if ( $status->successCount > 0 ) { + # Essentially we are displacing any existing current file and saving + # a new current file at the old location. If just the first succeeded, + # we still need to displace the current DB entry and put in a new one. + if ( !$this->recordUpload2( $status->value, $comment, $pageText, $props, $timestamp, $user ) ) { + $status->fatal( 'filenotfound', $srcPath ); + } + } + + $this->unlock(); // done + + return $status; + } + + /** + * Record a file upload in the upload log and the image table + */ + function recordUpload( $oldver, $desc, $license = '', $copyStatus = '', $source = '', + $watch = false, $timestamp = false ) + { + $pageText = SpecialUpload::getInitialPageText( $desc, $license, $copyStatus, $source ); + + if ( !$this->recordUpload2( $oldver, $desc, $pageText ) ) { + return false; + } + + if ( $watch ) { + global $wgUser; + $wgUser->addWatch( $this->getTitle() ); + } + return true; + } + + /** + * Record a file upload in the upload log and the image table + */ + function recordUpload2( + $oldver, $comment, $pageText, $props = false, $timestamp = false, $user = null + ) { + if ( is_null( $user ) ) { + global $wgUser; + $user = $wgUser; + } + + $dbw = $this->repo->getMasterDB(); + $dbw->begin(); + + if ( !$props ) { + $props = $this->repo->getFileProps( $this->getVirtualUrl() ); + } + + if ( $timestamp === false ) { + $timestamp = $dbw->timestamp(); + } + + $props['description'] = $comment; + $props['user'] = $user->getId(); + $props['user_text'] = $user->getName(); + $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW + $this->setProps( $props ); + + # Delete thumbnails + $this->purgeThumbnails(); + + # The file is already on its final location, remove it from the squid cache + SquidUpdate::purge( array( $this->getURL() ) ); + + # Fail now if the file isn't there + if ( !$this->fileExists ) { + wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!\n" ); + return false; + } + + $reupload = false; + + # Test to see if the row exists using INSERT IGNORE + # This avoids race conditions by locking the row until the commit, and also + # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition. + $dbw->insert( 'image', + array( + 'img_name' => $this->getName(), + 'img_size' => $this->size, + 'img_width' => intval( $this->width ), + 'img_height' => intval( $this->height ), + 'img_bits' => $this->bits, + 'img_media_type' => $this->media_type, + 'img_major_mime' => $this->major_mime, + 'img_minor_mime' => $this->minor_mime, + 'img_timestamp' => $timestamp, + 'img_description' => $comment, + 'img_user' => $user->getId(), + 'img_user_text' => $user->getName(), + 'img_metadata' => $this->metadata, + 'img_sha1' => $this->sha1 + ), + __METHOD__, + 'IGNORE' + ); + + if ( $dbw->affectedRows() == 0 ) { + if ( $oldver == '' ) { // XXX + # (bug 34993) publish() can displace the current file and yet fail to save + # a new one. The next publish attempt will treat the file as a brand new file + # and pass an empty $oldver. Allow this bogus value so we can displace the + # `image` row to `oldimage`, leaving room for the new current file `image` row. + #throw new MWException( "Empty oi_archive_name. Database and storage out of sync?" ); + } + $reupload = true; + # Collision, this is an update of a file + # Insert previous contents into oldimage + $dbw->insertSelect( 'oldimage', 'image', + array( + 'oi_name' => 'img_name', + 'oi_archive_name' => $dbw->addQuotes( $oldver ), + 'oi_size' => 'img_size', + 'oi_width' => 'img_width', + 'oi_height' => 'img_height', + 'oi_bits' => 'img_bits', + 'oi_timestamp' => 'img_timestamp', + 'oi_description' => 'img_description', + 'oi_user' => 'img_user', + 'oi_user_text' => 'img_user_text', + 'oi_metadata' => 'img_metadata', + 'oi_media_type' => 'img_media_type', + 'oi_major_mime' => 'img_major_mime', + 'oi_minor_mime' => 'img_minor_mime', + 'oi_sha1' => 'img_sha1' + ), + array( 'img_name' => $this->getName() ), + __METHOD__ + ); + + # Update the current image row + $dbw->update( 'image', + array( /* SET */ + 'img_size' => $this->size, + 'img_width' => intval( $this->width ), + 'img_height' => intval( $this->height ), + 'img_bits' => $this->bits, + 'img_media_type' => $this->media_type, + 'img_major_mime' => $this->major_mime, + 'img_minor_mime' => $this->minor_mime, + 'img_timestamp' => $timestamp, + 'img_description' => $comment, + 'img_user' => $user->getId(), + 'img_user_text' => $user->getName(), + 'img_metadata' => $this->metadata, + 'img_sha1' => $this->sha1 + ), + array( 'img_name' => $this->getName() ), + __METHOD__ + ); + } else { + # This is a new file + # Update the image count + $dbw->begin( __METHOD__ ); + $dbw->update( + 'site_stats', + array( 'ss_images = ss_images+1' ), + '*', + __METHOD__ + ); + $dbw->commit( __METHOD__ ); + } + + $descTitle = $this->getTitle(); + $wikiPage = new WikiFilePage( $descTitle ); + $wikiPage->setFile( $this ); + + # Add the log entry + $log = new LogPage( 'upload' ); + $action = $reupload ? 'overwrite' : 'upload'; + $log->addEntry( $action, $descTitle, $comment, array(), $user ); + + if ( $descTitle->exists() ) { + # Create a null revision + $latest = $descTitle->getLatestRevID(); + $nullRevision = Revision::newNullRevision( + $dbw, + $descTitle->getArticleId(), + $log->getRcComment(), + false + ); + if (!is_null($nullRevision)) { + $nullRevision->insertOn( $dbw ); + + wfRunHooks( 'NewRevisionFromEditComplete', array( $wikiPage, $nullRevision, $latest, $user ) ); + $wikiPage->updateRevisionOn( $dbw, $nullRevision ); + } + # Invalidate the cache for the description page + $descTitle->invalidateCache(); + $descTitle->purgeSquid(); + } else { + # New file; create the description page. + # There's already a log entry, so don't make a second RC entry + # Squid and file cache for the description page are purged by doEdit. + $wikiPage->doEdit( $pageText, $comment, EDIT_NEW | EDIT_SUPPRESS_RC, false, $user ); + } + + # Commit the transaction now, in case something goes wrong later + # The most important thing is that files don't get lost, especially archives + $dbw->commit(); + + # Save to cache and purge the squid + # We shall not saveToCache before the commit since otherwise + # in case of a rollback there is an usable file from memcached + # which in fact doesn't really exist (bug 24978) + $this->saveToCache(); + + # Hooks, hooks, the magic of hooks... + wfRunHooks( 'FileUpload', array( $this, $reupload, $descTitle->exists() ) ); + + # Invalidate cache for all pages using this file + $update = new HTMLCacheUpdate( $this->getTitle(), 'imagelinks' ); + $update->doUpdate(); + + # Invalidate cache for all pages that redirects on this page + $redirs = $this->getTitle()->getRedirectsHere(); + + foreach ( $redirs as $redir ) { + $update = new HTMLCacheUpdate( $redir, 'imagelinks' ); + $update->doUpdate(); + } + + return true; + } + + /** + * Move or copy a file to its public location. If a file exists at the + * destination, move it to an archive. Returns a FileRepoStatus object with + * the archive name in the "value" member on success. + * + * The archive name should be passed through to recordUpload for database + * registration. + * + * @param $srcPath String: local filesystem path to the source image + * @param $flags Integer: a bitwise combination of: + * File::DELETE_SOURCE Delete the source file, i.e. move rather than copy + * @return FileRepoStatus object. On success, the value member contains the + * archive name, or an empty string if it was a new file. + */ + function publish( $srcPath, $flags = 0 ) { + return $this->publishTo( $srcPath, $this->getRel(), $flags ); + } + + /** + * Move or copy a file to a specified location. Returns a FileRepoStatus + * object with the archive name in the "value" member on success. + * + * The archive name should be passed through to recordUpload for database + * registration. + * + * @param $srcPath String: local filesystem path to the source image + * @param $dstRel String: target relative path + * @param $flags Integer: a bitwise combination of: + * File::DELETE_SOURCE Delete the source file, i.e. move rather than copy + * @return FileRepoStatus object. On success, the value member contains the + * archive name, or an empty string if it was a new file. + */ + function publishTo( $srcPath, $dstRel, $flags = 0 ) { + $this->lock(); // begin + + $archiveName = wfTimestamp( TS_MW ) . '!'. $this->getName(); + $archiveRel = 'archive/' . $this->getHashPath() . $archiveName; + $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0; + $status = $this->repo->publish( $srcPath, $dstRel, $archiveRel, $flags ); + + if ( $status->value == 'new' ) { + $status->value = ''; + } else { + $status->value = $archiveName; + } + + $this->unlock(); // done + + return $status; + } + + /** getLinksTo inherited */ + /** getExifData inherited */ + /** isLocal inherited */ + /** wasDeleted inherited */ + + /** + * Move file to the new title + * + * Move current, old version and all thumbnails + * to the new filename. Old file is deleted. + * + * Cache purging is done; checks for validity + * and logging are caller's responsibility + * + * @param $target Title New file name + * @return FileRepoStatus object. + */ + function move( $target ) { + wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() ); + $this->lock(); // begin + + $batch = new LocalFileMoveBatch( $this, $target ); + $batch->addCurrent(); + $batch->addOlds(); + + $status = $batch->execute(); + wfDebugLog( 'imagemove', "Finished moving {$this->name}" ); + + $this->purgeEverything(); + $this->unlock(); // done + + if ( $status->isOk() ) { + // Now switch the object + $this->title = $target; + // Force regeneration of the name and hashpath + unset( $this->name ); + unset( $this->hashPath ); + // Purge the new image + $this->purgeEverything(); + } + + return $status; + } + + /** + * Delete all versions of the file. + * + * Moves the files into an archive directory (or deletes them) + * and removes the database rows. + * + * Cache purging is done; logging is caller's responsibility. + * + * @param $reason + * @param $suppress + * @return FileRepoStatus object. + */ + function delete( $reason, $suppress = false ) { + $this->lock(); // begin + + $batch = new LocalFileDeleteBatch( $this, $reason, $suppress ); + $batch->addCurrent(); + + # Get old version relative paths + $dbw = $this->repo->getMasterDB(); + $result = $dbw->select( 'oldimage', + array( 'oi_archive_name' ), + array( 'oi_name' => $this->getName() ) ); + foreach ( $result as $row ) { + $batch->addOld( $row->oi_archive_name ); + $this->purgeOldThumbnails( $row->oi_archive_name ); + } + $status = $batch->execute(); + + if ( $status->ok ) { + // Update site_stats + $site_stats = $dbw->tableName( 'site_stats' ); + $dbw->query( "UPDATE $site_stats SET ss_images=ss_images-1", __METHOD__ ); + $this->purgeEverything(); + } + + $this->unlock(); // done + + return $status; + } + + /** + * Delete an old version of the file. + * + * Moves the file into an archive directory (or deletes it) + * and removes the database row. + * + * Cache purging is done; logging is caller's responsibility. + * + * @param $archiveName String + * @param $reason String + * @param $suppress Boolean + * @throws MWException or FSException on database or file store failure + * @return FileRepoStatus object. + */ + function deleteOld( $archiveName, $reason, $suppress = false ) { + $this->lock(); // begin + + $batch = new LocalFileDeleteBatch( $this, $reason, $suppress ); + $batch->addOld( $archiveName ); + $this->purgeOldThumbnails( $archiveName ); + $status = $batch->execute(); + + $this->unlock(); // done + + if ( $status->ok ) { + $this->purgeDescription(); + $this->purgeHistory(); + } + + return $status; + } + + /** + * Restore all or specified deleted revisions to the given file. + * Permissions and logging are left to the caller. + * + * May throw database exceptions on error. + * + * @param $versions set of record ids of deleted items to restore, + * or empty to restore all revisions. + * @param $unsuppress Boolean + * @return FileRepoStatus + */ + function restore( $versions = array(), $unsuppress = false ) { + $batch = new LocalFileRestoreBatch( $this, $unsuppress ); + + if ( !$versions ) { + $batch->addAll(); + } else { + $batch->addIds( $versions ); + } + + $status = $batch->execute(); + + if ( !$status->isGood() ) { + return $status; + } + + $cleanupStatus = $batch->cleanup(); + $cleanupStatus->successCount = 0; + $cleanupStatus->failCount = 0; + $status->merge( $cleanupStatus ); + + return $status; + } + + /** isMultipage inherited */ + /** pageCount inherited */ + /** scaleHeight inherited */ + /** getImageSize inherited */ + + /** + * Get the URL of the file description page. + */ + function getDescriptionUrl() { + return $this->title->getLocalUrl(); + } + + /** + * Get the HTML text of the description page + * This is not used by ImagePage for local files, since (among other things) + * it skips the parser cache. + */ + function getDescriptionText() { + global $wgParser; + $revision = Revision::newFromTitle( $this->title ); + if ( !$revision ) return false; + $text = $revision->getText(); + if ( !$text ) return false; + $pout = $wgParser->parse( $text, $this->title, new ParserOptions() ); + return $pout->getText(); + } + + function getDescription() { + $this->load(); + return $this->description; + } + + function getTimestamp() { + $this->load(); + return $this->timestamp; + } + + function getSha1() { + $this->load(); + // Initialise now if necessary + if ( $this->sha1 == '' && $this->fileExists ) { + $this->lock(); // begin + + $this->sha1 = $this->repo->getFileSha1( $this->getPath() ); + if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) { + $dbw = $this->repo->getMasterDB(); + $dbw->update( 'image', + array( 'img_sha1' => $this->sha1 ), + array( 'img_name' => $this->getName() ), + __METHOD__ ); + $this->saveToCache(); + } + + $this->unlock(); // done + } + + return $this->sha1; + } + + /** + * Start a transaction and lock the image for update + * Increments a reference counter if the lock is already held + * @return boolean True if the image exists, false otherwise + */ + function lock() { + $dbw = $this->repo->getMasterDB(); + + if ( !$this->locked ) { + $dbw->begin(); + $this->locked++; + } + + return $dbw->selectField( 'image', '1', array( 'img_name' => $this->getName() ), __METHOD__ ); + } + + /** + * Decrement the lock reference count. If the reference count is reduced to zero, commits + * the transaction and thereby releases the image lock. + */ + function unlock() { + if ( $this->locked ) { + --$this->locked; + if ( !$this->locked ) { + $dbw = $this->repo->getMasterDB(); + $dbw->commit(); + } + } + } + + /** + * Roll back the DB transaction and mark the image unlocked + */ + function unlockAndRollback() { + $this->locked = false; + $dbw = $this->repo->getMasterDB(); + $dbw->rollback(); + } +} // LocalFile class + +# ------------------------------------------------------------------------------ + +/** + * Helper class for file deletion + * @ingroup FileAbstraction + */ +class LocalFileDeleteBatch { + + /** + * @var LocalFile + */ + var $file; + + var $reason, $srcRels = array(), $archiveUrls = array(), $deletionBatch, $suppress; + var $status; + + function __construct( File $file, $reason = '', $suppress = false ) { + $this->file = $file; + $this->reason = $reason; + $this->suppress = $suppress; + $this->status = $file->repo->newGood(); + } + + function addCurrent() { + $this->srcRels['.'] = $this->file->getRel(); + } + + function addOld( $oldName ) { + $this->srcRels[$oldName] = $this->file->getArchiveRel( $oldName ); + $this->archiveUrls[] = $this->file->getArchiveUrl( $oldName ); + } + + function getOldRels() { + if ( !isset( $this->srcRels['.'] ) ) { + $oldRels =& $this->srcRels; + $deleteCurrent = false; + } else { + $oldRels = $this->srcRels; + unset( $oldRels['.'] ); + $deleteCurrent = true; + } + + return array( $oldRels, $deleteCurrent ); + } + + protected function getHashes() { + $hashes = array(); + list( $oldRels, $deleteCurrent ) = $this->getOldRels(); + + if ( $deleteCurrent ) { + $hashes['.'] = $this->file->getSha1(); + } + + if ( count( $oldRels ) ) { + $dbw = $this->file->repo->getMasterDB(); + $res = $dbw->select( + 'oldimage', + array( 'oi_archive_name', 'oi_sha1' ), + 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')', + __METHOD__ + ); + + foreach ( $res as $row ) { + if ( rtrim( $row->oi_sha1, "\0" ) === '' ) { + // Get the hash from the file + $oldUrl = $this->file->getArchiveVirtualUrl( $row->oi_archive_name ); + $props = $this->file->repo->getFileProps( $oldUrl ); + + if ( $props['fileExists'] ) { + // Upgrade the oldimage row + $dbw->update( 'oldimage', + array( 'oi_sha1' => $props['sha1'] ), + array( 'oi_name' => $this->file->getName(), 'oi_archive_name' => $row->oi_archive_name ), + __METHOD__ ); + $hashes[$row->oi_archive_name] = $props['sha1']; + } else { + $hashes[$row->oi_archive_name] = false; + } + } else { + $hashes[$row->oi_archive_name] = $row->oi_sha1; + } + } + } + + $missing = array_diff_key( $this->srcRels, $hashes ); + + foreach ( $missing as $name => $rel ) { + $this->status->error( 'filedelete-old-unregistered', $name ); + } + + foreach ( $hashes as $name => $hash ) { + if ( !$hash ) { + $this->status->error( 'filedelete-missing', $this->srcRels[$name] ); + unset( $hashes[$name] ); + } + } + + return $hashes; + } + + function doDBInserts() { + global $wgUser; + + $dbw = $this->file->repo->getMasterDB(); + $encTimestamp = $dbw->addQuotes( $dbw->timestamp() ); + $encUserId = $dbw->addQuotes( $wgUser->getId() ); + $encReason = $dbw->addQuotes( $this->reason ); + $encGroup = $dbw->addQuotes( 'deleted' ); + $ext = $this->file->getExtension(); + $dotExt = $ext === '' ? '' : ".$ext"; + $encExt = $dbw->addQuotes( $dotExt ); + list( $oldRels, $deleteCurrent ) = $this->getOldRels(); + + // Bitfields to further suppress the content + if ( $this->suppress ) { + $bitfield = 0; + // This should be 15... + $bitfield |= Revision::DELETED_TEXT; + $bitfield |= Revision::DELETED_COMMENT; + $bitfield |= Revision::DELETED_USER; + $bitfield |= Revision::DELETED_RESTRICTED; + } else { + $bitfield = 'oi_deleted'; + } + + if ( $deleteCurrent ) { + $concat = $dbw->buildConcat( array( "img_sha1", $encExt ) ); + $where = array( 'img_name' => $this->file->getName() ); + $dbw->insertSelect( 'filearchive', 'image', + array( + 'fa_storage_group' => $encGroup, + 'fa_storage_key' => "CASE WHEN img_sha1='' THEN '' ELSE $concat END", + 'fa_deleted_user' => $encUserId, + 'fa_deleted_timestamp' => $encTimestamp, + 'fa_deleted_reason' => $encReason, + 'fa_deleted' => $this->suppress ? $bitfield : 0, + + 'fa_name' => 'img_name', + 'fa_archive_name' => 'NULL', + 'fa_size' => 'img_size', + 'fa_width' => 'img_width', + 'fa_height' => 'img_height', + 'fa_metadata' => 'img_metadata', + 'fa_bits' => 'img_bits', + 'fa_media_type' => 'img_media_type', + 'fa_major_mime' => 'img_major_mime', + 'fa_minor_mime' => 'img_minor_mime', + 'fa_description' => 'img_description', + 'fa_user' => 'img_user', + 'fa_user_text' => 'img_user_text', + 'fa_timestamp' => 'img_timestamp' + ), $where, __METHOD__ ); + } + + if ( count( $oldRels ) ) { + $concat = $dbw->buildConcat( array( "oi_sha1", $encExt ) ); + $where = array( + 'oi_name' => $this->file->getName(), + 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')' ); + $dbw->insertSelect( 'filearchive', 'oldimage', + array( + 'fa_storage_group' => $encGroup, + 'fa_storage_key' => "CASE WHEN oi_sha1='' THEN '' ELSE $concat END", + 'fa_deleted_user' => $encUserId, + 'fa_deleted_timestamp' => $encTimestamp, + 'fa_deleted_reason' => $encReason, + 'fa_deleted' => $this->suppress ? $bitfield : 'oi_deleted', + + 'fa_name' => 'oi_name', + 'fa_archive_name' => 'oi_archive_name', + 'fa_size' => 'oi_size', + 'fa_width' => 'oi_width', + 'fa_height' => 'oi_height', + 'fa_metadata' => 'oi_metadata', + 'fa_bits' => 'oi_bits', + 'fa_media_type' => 'oi_media_type', + 'fa_major_mime' => 'oi_major_mime', + 'fa_minor_mime' => 'oi_minor_mime', + 'fa_description' => 'oi_description', + 'fa_user' => 'oi_user', + 'fa_user_text' => 'oi_user_text', + 'fa_timestamp' => 'oi_timestamp', + 'fa_deleted' => $bitfield + ), $where, __METHOD__ ); + } + } + + function doDBDeletes() { + $dbw = $this->file->repo->getMasterDB(); + list( $oldRels, $deleteCurrent ) = $this->getOldRels(); + + if ( count( $oldRels ) ) { + $dbw->delete( 'oldimage', + array( + 'oi_name' => $this->file->getName(), + 'oi_archive_name' => array_keys( $oldRels ) + ), __METHOD__ ); + } + + if ( $deleteCurrent ) { + $dbw->delete( 'image', array( 'img_name' => $this->file->getName() ), __METHOD__ ); + } + } + + /** + * Run the transaction + */ + function execute() { + global $wgUseSquid; + wfProfileIn( __METHOD__ ); + + $this->file->lock(); + // Leave private files alone + $privateFiles = array(); + list( $oldRels, $deleteCurrent ) = $this->getOldRels(); + $dbw = $this->file->repo->getMasterDB(); + + if ( !empty( $oldRels ) ) { + $res = $dbw->select( 'oldimage', + array( 'oi_archive_name' ), + array( 'oi_name' => $this->file->getName(), + 'oi_archive_name IN (' . $dbw->makeList( array_keys( $oldRels ) ) . ')', + $dbw->bitAnd( 'oi_deleted', File::DELETED_FILE ) => File::DELETED_FILE ), + __METHOD__ ); + + foreach ( $res as $row ) { + $privateFiles[$row->oi_archive_name] = 1; + } + } + // Prepare deletion batch + $hashes = $this->getHashes(); + $this->deletionBatch = array(); + $ext = $this->file->getExtension(); + $dotExt = $ext === '' ? '' : ".$ext"; + + foreach ( $this->srcRels as $name => $srcRel ) { + // Skip files that have no hash (missing source). + // Keep private files where they are. + if ( isset( $hashes[$name] ) && !array_key_exists( $name, $privateFiles ) ) { + $hash = $hashes[$name]; + $key = $hash . $dotExt; + $dstRel = $this->file->repo->getDeletedHashPath( $key ) . $key; + $this->deletionBatch[$name] = array( $srcRel, $dstRel ); + } + } + + // Lock the filearchive rows so that the files don't get deleted by a cleanup operation + // We acquire this lock by running the inserts now, before the file operations. + // + // This potentially has poor lock contention characteristics -- an alternative + // scheme would be to insert stub filearchive entries with no fa_name and commit + // them in a separate transaction, then run the file ops, then update the fa_name fields. + $this->doDBInserts(); + + // Removes non-existent file from the batch, so we don't get errors. + $this->deletionBatch = $this->removeNonexistentFiles( $this->deletionBatch ); + + // Execute the file deletion batch + $status = $this->file->repo->deleteBatch( $this->deletionBatch ); + + if ( !$status->isGood() ) { + $this->status->merge( $status ); + } + + if ( !$this->status->ok ) { + // Critical file deletion error + // Roll back inserts, release lock and abort + // TODO: delete the defunct filearchive rows if we are using a non-transactional DB + $this->file->unlockAndRollback(); + wfProfileOut( __METHOD__ ); + return $this->status; + } + + // Purge squid + if ( $wgUseSquid ) { + $urls = array(); + + foreach ( $this->srcRels as $srcRel ) { + $urlRel = str_replace( '%2F', '/', rawurlencode( $srcRel ) ); + $urls[] = $this->file->repo->getZoneUrl( 'public' ) . '/' . $urlRel; + } + SquidUpdate::purge( $urls ); + } + + // Delete image/oldimage rows + $this->doDBDeletes(); + + // Commit and return + $this->file->unlock(); + wfProfileOut( __METHOD__ ); + + return $this->status; + } + + /** + * Removes non-existent files from a deletion batch. + */ + function removeNonexistentFiles( $batch ) { + $files = $newBatch = array(); + + foreach ( $batch as $batchItem ) { + list( $src, $dest ) = $batchItem; + $files[$src] = $this->file->repo->getVirtualUrl( 'public' ) . '/' . rawurlencode( $src ); + } + + $result = $this->file->repo->fileExistsBatch( $files, FileRepo::FILES_ONLY ); + + foreach ( $batch as $batchItem ) { + if ( $result[$batchItem[0]] ) { + $newBatch[] = $batchItem; + } + } + + return $newBatch; + } +} + +# ------------------------------------------------------------------------------ + +/** + * Helper class for file undeletion + * @ingroup FileAbstraction + */ +class LocalFileRestoreBatch { + /** + * @var LocalFile + */ + var $file; + + var $cleanupBatch, $ids, $all, $unsuppress = false; + + function __construct( File $file, $unsuppress = false ) { + $this->file = $file; + $this->cleanupBatch = $this->ids = array(); + $this->ids = array(); + $this->unsuppress = $unsuppress; + } + + /** + * Add a file by ID + */ + function addId( $fa_id ) { + $this->ids[] = $fa_id; + } + + /** + * Add a whole lot of files by ID + */ + function addIds( $ids ) { + $this->ids = array_merge( $this->ids, $ids ); + } + + /** + * Add all revisions of the file + */ + function addAll() { + $this->all = true; + } + + /** + * Run the transaction, except the cleanup batch. + * The cleanup batch should be run in a separate transaction, because it locks different + * rows and there's no need to keep the image row locked while it's acquiring those locks + * The caller may have its own transaction open. + * So we save the batch and let the caller call cleanup() + */ + function execute() { + global $wgLang; + + if ( !$this->all && !$this->ids ) { + // Do nothing + return $this->file->repo->newGood(); + } + + $exists = $this->file->lock(); + $dbw = $this->file->repo->getMasterDB(); + $status = $this->file->repo->newGood(); + + // Fetch all or selected archived revisions for the file, + // sorted from the most recent to the oldest. + $conditions = array( 'fa_name' => $this->file->getName() ); + + if ( !$this->all ) { + $conditions[] = 'fa_id IN (' . $dbw->makeList( $this->ids ) . ')'; + } + + $result = $dbw->select( 'filearchive', '*', + $conditions, + __METHOD__, + array( 'ORDER BY' => 'fa_timestamp DESC' ) + ); + + $idsPresent = array(); + $storeBatch = array(); + $insertBatch = array(); + $insertCurrent = false; + $deleteIds = array(); + $first = true; + $archiveNames = array(); + + foreach ( $result as $row ) { + $idsPresent[] = $row->fa_id; + + if ( $row->fa_name != $this->file->getName() ) { + $status->error( 'undelete-filename-mismatch', $wgLang->timeanddate( $row->fa_timestamp ) ); + $status->failCount++; + continue; + } + + if ( $row->fa_storage_key == '' ) { + // Revision was missing pre-deletion + $status->error( 'undelete-bad-store-key', $wgLang->timeanddate( $row->fa_timestamp ) ); + $status->failCount++; + continue; + } + + $deletedRel = $this->file->repo->getDeletedHashPath( $row->fa_storage_key ) . $row->fa_storage_key; + $deletedUrl = $this->file->repo->getVirtualUrl() . '/deleted/' . $deletedRel; + + $sha1 = substr( $row->fa_storage_key, 0, strcspn( $row->fa_storage_key, '.' ) ); + + # Fix leading zero + if ( strlen( $sha1 ) == 32 && $sha1[0] == '0' ) { + $sha1 = substr( $sha1, 1 ); + } + + if ( is_null( $row->fa_major_mime ) || $row->fa_major_mime == 'unknown' + || is_null( $row->fa_minor_mime ) || $row->fa_minor_mime == 'unknown' + || is_null( $row->fa_media_type ) || $row->fa_media_type == 'UNKNOWN' + || is_null( $row->fa_metadata ) ) { + // Refresh our metadata + // Required for a new current revision; nice for older ones too. :) + $props = RepoGroup::singleton()->getFileProps( $deletedUrl ); + } else { + $props = array( + 'minor_mime' => $row->fa_minor_mime, + 'major_mime' => $row->fa_major_mime, + 'media_type' => $row->fa_media_type, + 'metadata' => $row->fa_metadata + ); + } + + if ( $first && !$exists ) { + // This revision will be published as the new current version + $destRel = $this->file->getRel(); + $insertCurrent = array( + 'img_name' => $row->fa_name, + 'img_size' => $row->fa_size, + 'img_width' => $row->fa_width, + 'img_height' => $row->fa_height, + 'img_metadata' => $props['metadata'], + 'img_bits' => $row->fa_bits, + 'img_media_type' => $props['media_type'], + 'img_major_mime' => $props['major_mime'], + 'img_minor_mime' => $props['minor_mime'], + 'img_description' => $row->fa_description, + 'img_user' => $row->fa_user, + 'img_user_text' => $row->fa_user_text, + 'img_timestamp' => $row->fa_timestamp, + 'img_sha1' => $sha1 + ); + + // The live (current) version cannot be hidden! + if ( !$this->unsuppress && $row->fa_deleted ) { + $storeBatch[] = array( $deletedUrl, 'public', $destRel ); + $this->cleanupBatch[] = $row->fa_storage_key; + } + } else { + $archiveName = $row->fa_archive_name; + + if ( $archiveName == '' ) { + // This was originally a current version; we + // have to devise a new archive name for it. + // Format is <timestamp of archiving>!<name> + $timestamp = wfTimestamp( TS_UNIX, $row->fa_deleted_timestamp ); + + do { + $archiveName = wfTimestamp( TS_MW, $timestamp ) . '!' . $row->fa_name; + $timestamp++; + } while ( isset( $archiveNames[$archiveName] ) ); + } + + $archiveNames[$archiveName] = true; + $destRel = $this->file->getArchiveRel( $archiveName ); + $insertBatch[] = array( + 'oi_name' => $row->fa_name, + 'oi_archive_name' => $archiveName, + 'oi_size' => $row->fa_size, + 'oi_width' => $row->fa_width, + 'oi_height' => $row->fa_height, + 'oi_bits' => $row->fa_bits, + 'oi_description' => $row->fa_description, + 'oi_user' => $row->fa_user, + 'oi_user_text' => $row->fa_user_text, + 'oi_timestamp' => $row->fa_timestamp, + 'oi_metadata' => $props['metadata'], + 'oi_media_type' => $props['media_type'], + 'oi_major_mime' => $props['major_mime'], + 'oi_minor_mime' => $props['minor_mime'], + 'oi_deleted' => $this->unsuppress ? 0 : $row->fa_deleted, + 'oi_sha1' => $sha1 ); + } + + $deleteIds[] = $row->fa_id; + + if ( !$this->unsuppress && $row->fa_deleted & File::DELETED_FILE ) { + // private files can stay where they are + $status->successCount++; + } else { + $storeBatch[] = array( $deletedUrl, 'public', $destRel ); + $this->cleanupBatch[] = $row->fa_storage_key; + } + + $first = false; + } + + unset( $result ); + + // Add a warning to the status object for missing IDs + $missingIds = array_diff( $this->ids, $idsPresent ); + + foreach ( $missingIds as $id ) { + $status->error( 'undelete-missing-filearchive', $id ); + } + + // Remove missing files from batch, so we don't get errors when undeleting them + $storeBatch = $this->removeNonexistentFiles( $storeBatch ); + + // Run the store batch + // Use the OVERWRITE_SAME flag to smooth over a common error + $storeStatus = $this->file->repo->storeBatch( $storeBatch, FileRepo::OVERWRITE_SAME ); + $status->merge( $storeStatus ); + + if ( !$status->isGood() ) { + // Even if some files could be copied, fail entirely as that is the + // easiest thing to do without data loss + $this->cleanupFailedBatch( $storeStatus, $storeBatch ); + $status->ok = false; + $this->file->unlock(); + + return $status; + } + + // Run the DB updates + // Because we have locked the image row, key conflicts should be rare. + // If they do occur, we can roll back the transaction at this time with + // no data loss, but leaving unregistered files scattered throughout the + // public zone. + // This is not ideal, which is why it's important to lock the image row. + if ( $insertCurrent ) { + $dbw->insert( 'image', $insertCurrent, __METHOD__ ); + } + + if ( $insertBatch ) { + $dbw->insert( 'oldimage', $insertBatch, __METHOD__ ); + } + + if ( $deleteIds ) { + $dbw->delete( 'filearchive', + array( 'fa_id IN (' . $dbw->makeList( $deleteIds ) . ')' ), + __METHOD__ ); + } + + // If store batch is empty (all files are missing), deletion is to be considered successful + if ( $status->successCount > 0 || !$storeBatch ) { + if ( !$exists ) { + wfDebug( __METHOD__ . " restored {$status->successCount} items, creating a new current\n" ); + + // Update site_stats + $site_stats = $dbw->tableName( 'site_stats' ); + $dbw->query( "UPDATE $site_stats SET ss_images=ss_images+1", __METHOD__ ); + + $this->file->purgeEverything(); + } else { + wfDebug( __METHOD__ . " restored {$status->successCount} as archived versions\n" ); + $this->file->purgeDescription(); + $this->file->purgeHistory(); + } + } + + $this->file->unlock(); + + return $status; + } + + /** + * Removes non-existent files from a store batch. + */ + function removeNonexistentFiles( $triplets ) { + $files = $filteredTriplets = array(); + foreach ( $triplets as $file ) + $files[$file[0]] = $file[0]; + + $result = $this->file->repo->fileExistsBatch( $files, FileRepo::FILES_ONLY ); + + foreach ( $triplets as $file ) { + if ( $result[$file[0]] ) { + $filteredTriplets[] = $file; + } + } + + return $filteredTriplets; + } + + /** + * Removes non-existent files from a cleanup batch. + */ + function removeNonexistentFromCleanup( $batch ) { + $files = $newBatch = array(); + $repo = $this->file->repo; + + foreach ( $batch as $file ) { + $files[$file] = $repo->getVirtualUrl( 'deleted' ) . '/' . + rawurlencode( $repo->getDeletedHashPath( $file ) . $file ); + } + + $result = $repo->fileExistsBatch( $files, FileRepo::FILES_ONLY ); + + foreach ( $batch as $file ) { + if ( $result[$file] ) { + $newBatch[] = $file; + } + } + + return $newBatch; + } + + /** + * Delete unused files in the deleted zone. + * This should be called from outside the transaction in which execute() was called. + */ + function cleanup() { + if ( !$this->cleanupBatch ) { + return $this->file->repo->newGood(); + } + + $this->cleanupBatch = $this->removeNonexistentFromCleanup( $this->cleanupBatch ); + + $status = $this->file->repo->cleanupDeletedBatch( $this->cleanupBatch ); + + return $status; + } + + /** + * Cleanup a failed batch. The batch was only partially successful, so + * rollback by removing all items that were succesfully copied. + * + * @param Status $storeStatus + * @param array $storeBatch + */ + function cleanupFailedBatch( $storeStatus, $storeBatch ) { + $cleanupBatch = array(); + + foreach ( $storeStatus->success as $i => $success ) { + // Check if this item of the batch was successfully copied + if ( $success ) { + // Item was successfully copied and needs to be removed again + // Extract ($dstZone, $dstRel) from the batch + $cleanupBatch[] = array( $storeBatch[$i][1], $storeBatch[$i][2] ); + } + } + $this->file->repo->cleanupBatch( $cleanupBatch ); + } +} + +# ------------------------------------------------------------------------------ + +/** + * Helper class for file movement + * @ingroup FileAbstraction + */ +class LocalFileMoveBatch { + + /** + * @var File + */ + var $file; + + /** + * @var Title + */ + var $target; + + var $cur, $olds, $oldCount, $archive, $db; + + function __construct( File $file, Title $target ) { + $this->file = $file; + $this->target = $target; + $this->oldHash = $this->file->repo->getHashPath( $this->file->getName() ); + $this->newHash = $this->file->repo->getHashPath( $this->target->getDBkey() ); + $this->oldName = $this->file->getName(); + $this->newName = $this->file->repo->getNameFromTitle( $this->target ); + $this->oldRel = $this->oldHash . $this->oldName; + $this->newRel = $this->newHash . $this->newName; + $this->db = $file->repo->getMasterDb(); + } + + /** + * Add the current image to the batch + */ + function addCurrent() { + $this->cur = array( $this->oldRel, $this->newRel ); + } + + /** + * Add the old versions of the image to the batch + */ + function addOlds() { + $archiveBase = 'archive'; + $this->olds = array(); + $this->oldCount = 0; + + $result = $this->db->select( 'oldimage', + array( 'oi_archive_name', 'oi_deleted' ), + array( 'oi_name' => $this->oldName ), + __METHOD__ + ); + + foreach ( $result as $row ) { + $oldName = $row->oi_archive_name; + $bits = explode( '!', $oldName, 2 ); + + if ( count( $bits ) != 2 ) { + wfDebug( "Old file name missing !: '$oldName' \n" ); + continue; + } + + list( $timestamp, $filename ) = $bits; + + if ( $this->oldName != $filename ) { + wfDebug( "Old file name doesn't match: '$oldName' \n" ); + continue; + } + + $this->oldCount++; + + // Do we want to add those to oldCount? + if ( $row->oi_deleted & File::DELETED_FILE ) { + continue; + } + + $this->olds[] = array( + "{$archiveBase}/{$this->oldHash}{$oldName}", + "{$archiveBase}/{$this->newHash}{$timestamp}!{$this->newName}" + ); + } + } + + /** + * Perform the move. + */ + function execute() { + $repo = $this->file->repo; + $status = $repo->newGood(); + $triplets = $this->getMoveTriplets(); + + $triplets = $this->removeNonexistentFiles( $triplets ); + + // Copy the files into their new location + $statusMove = $repo->storeBatch( $triplets ); + wfDebugLog( 'imagemove', "Moved files for {$this->file->getName()}: {$statusMove->successCount} successes, {$statusMove->failCount} failures" ); + if ( !$statusMove->isGood() ) { + wfDebugLog( 'imagemove', "Error in moving files: " . $statusMove->getWikiText() ); + $this->cleanupTarget( $triplets ); + $statusMove->ok = false; + return $statusMove; + } + + $this->db->begin(); + $statusDb = $this->doDBUpdates(); + wfDebugLog( 'imagemove', "Renamed {$this->file->getName()} in database: {$statusDb->successCount} successes, {$statusDb->failCount} failures" ); + if ( !$statusDb->isGood() ) { + $this->db->rollback(); + // Something went wrong with the DB updates, so remove the target files + $this->cleanupTarget( $triplets ); + $statusDb->ok = false; + return $statusDb; + } + $this->db->commit(); + + // Everything went ok, remove the source files + $this->cleanupSource( $triplets ); + + $status->merge( $statusDb ); + $status->merge( $statusMove ); + + return $status; + } + + /** + * Do the database updates and return a new FileRepoStatus indicating how + * many rows where updated. + * + * @return FileRepoStatus + */ + function doDBUpdates() { + $repo = $this->file->repo; + $status = $repo->newGood(); + $dbw = $this->db; + + // Update current image + $dbw->update( + 'image', + array( 'img_name' => $this->newName ), + array( 'img_name' => $this->oldName ), + __METHOD__ + ); + + if ( $dbw->affectedRows() ) { + $status->successCount++; + } else { + $status->failCount++; + $status->fatal( 'imageinvalidfilename' ); + return $status; + } + + // Update old images + $dbw->update( + 'oldimage', + array( + 'oi_name' => $this->newName, + 'oi_archive_name = ' . $dbw->strreplace( 'oi_archive_name', $dbw->addQuotes( $this->oldName ), $dbw->addQuotes( $this->newName ) ), + ), + array( 'oi_name' => $this->oldName ), + __METHOD__ + ); + + $affected = $dbw->affectedRows(); + $total = $this->oldCount; + $status->successCount += $affected; + $status->failCount += $total - $affected; + if ( $status->failCount ) { + $status->error( 'imageinvalidfilename' ); + } + + return $status; + } + + /** + * Generate triplets for FileRepo::storeBatch(). + */ + function getMoveTriplets() { + $moves = array_merge( array( $this->cur ), $this->olds ); + $triplets = array(); // The format is: (srcUrl, destZone, destUrl) + + foreach ( $moves as $move ) { + // $move: (oldRelativePath, newRelativePath) + $srcUrl = $this->file->repo->getVirtualUrl() . '/public/' . rawurlencode( $move[0] ); + $triplets[] = array( $srcUrl, 'public', $move[1] ); + wfDebugLog( 'imagemove', "Generated move triplet for {$this->file->getName()}: {$srcUrl} :: public :: {$move[1]}" ); + } + + return $triplets; + } + + /** + * Removes non-existent files from move batch. + */ + function removeNonexistentFiles( $triplets ) { + $files = array(); + + foreach ( $triplets as $file ) { + $files[$file[0]] = $file[0]; + } + + $result = $this->file->repo->fileExistsBatch( $files, FileRepo::FILES_ONLY ); + $filteredTriplets = array(); + + foreach ( $triplets as $file ) { + if ( $result[$file[0]] ) { + $filteredTriplets[] = $file; + } else { + wfDebugLog( 'imagemove', "File {$file[0]} does not exist" ); + } + } + + return $filteredTriplets; + } + + /** + * Cleanup a partially moved array of triplets by deleting the target + * files. Called if something went wrong half way. + */ + function cleanupTarget( $triplets ) { + // Create dest pairs from the triplets + $pairs = array(); + foreach ( $triplets as $triplet ) { + $pairs[] = array( $triplet[1], $triplet[2] ); + } + + $this->file->repo->cleanupBatch( $pairs ); + } + + /** + * Cleanup a fully moved array of triplets by deleting the source files. + * Called at the end of the move process if everything else went ok. + */ + function cleanupSource( $triplets ) { + // Create source file names from the triplets + $files = array(); + foreach ( $triplets as $triplet ) { + $files[] = $triplet[0]; + } + + $this->file->repo->cleanupBatch( $files ); + } +} |