LocalFile.php

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<?php
use MediaWiki\Logger\LoggerFactory;
use MediaWiki\MediaWikiServices;
use MediaWiki\Permissions\Authority;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Revision\RevisionStore;
use MediaWiki\Storage\BlobStore;
use MediaWiki\User\UserIdentity;
use MediaWiki\User\UserIdentityValue;
use Wikimedia\Rdbms\Blob;
use Wikimedia\Rdbms\Database;
use Wikimedia\Rdbms\IDatabase;
use Wikimedia\Rdbms\IResultWrapper;
 
class LocalFile extends File {
    private const VERSION = 13; // cache version
 
    private const CACHE_FIELD_MAX_LEN = 1000;
 
    private const MDS_EMPTY = 'empty';
 
    private const MDS_LEGACY = 'legacy';
 
    private const MDS_PHP = 'php';
 
    private const MDS_JSON = 'json';
 
    protected $fileExists;
 
    protected $width;
 
    protected $height;
 
    protected $bits;
 
    protected $media_type;
 
    protected $mime;
 
    protected $size;
 
    protected $metadataArray = [];
 
    protected $metadataSerializationFormat;
 
    protected $metadataBlobs = [];
 
    protected $unloadedMetadataBlobs = [];
 
    protected $sha1;
 
    protected $dataLoaded;
 
    protected $extraDataLoaded;
 
    protected $deleted;
 
    protected $repoClass = LocalRepo::class;
 
    private $historyLine;
 
    private $historyRes;
 
    private $major_mime;
 
    private $minor_mime;
 
    private $timestamp;
 
    private $user;
 
    private $description;
 
    private $descriptionTouched;
 
    private $upgraded;
 
    private $upgrading;
 
    private $locked;
 
    private $lockedOwnTrx;
 
    private $missing;
 
    // @note: higher than IDBAccessObject constants
    private const LOAD_ALL = 16; // integer; load all the lazy fields too (like metadata)
 
    private const ATOMIC_SECTION_LOCK = 'LocalFile::lockingTransaction';
 
    public static function newFromTitle( $title, $repo, $unused = null ) {
        return new static( $title, $repo );
    }
 
    public static function newFromRow( $row, $repo ) {
        $title = Title::makeTitle( NS_FILE, $row->img_name );
        $file = new static( $title, $repo );
        $file->loadFromRow( $row );
 
        return $file;
    }
 
    public static function newFromKey( $sha1, $repo, $timestamp = false ) {
        $dbr = $repo->getReplicaDB();
 
        $conds = [ 'img_sha1' => $sha1 ];
        if ( $timestamp ) {
            $conds['img_timestamp'] = $dbr->timestamp( $timestamp );
        }
 
        $fileQuery = static::getQueryInfo();
        $row = $dbr->selectRow(
            $fileQuery['tables'], $fileQuery['fields'], $conds, __METHOD__, [], $fileQuery['joins']
        );
        if ( $row ) {
            return static::newFromRow( $row, $repo );
        } else {
            return false;
        }
    }
 
    public static function getQueryInfo( array $options = [] ) {
        $commentQuery = MediaWikiServices::getInstance()->getCommentStore()->getJoin( 'img_description' );
        $ret = [
            'tables' => [
                'image',
                'image_actor' => 'actor'
            ] + $commentQuery['tables'],
            'fields' => [
                'img_name',
                'img_size',
                'img_width',
                'img_height',
                'img_metadata',
                'img_bits',
                'img_media_type',
                'img_major_mime',
                'img_minor_mime',
                'img_timestamp',
                'img_sha1',
                'img_actor',
                'img_user' => 'image_actor.actor_user',
                'img_user_text' => 'image_actor.actor_name',
            ] + $commentQuery['fields'],
            'joins' => [
                'image_actor' => [ 'JOIN', 'actor_id=img_actor' ]
            ] + $commentQuery['joins'],
        ];
 
        if ( in_array( 'omit-nonlazy', $options, true ) ) {
            // Internal use only for getting only the lazy fields
            $ret['fields'] = [];
        }
        if ( !in_array( 'omit-lazy', $options, true ) ) {
            // Note: Keep this in sync with self::getLazyCacheFields() and
            // self::loadExtraFromDB()
            $ret['fields'][] = 'img_metadata';
        }
 
        return $ret;
    }
 
    public function __construct( $title, $repo ) {
        parent::__construct( $title, $repo );
 
        $this->historyLine = 0;
        $this->historyRes = null;
        $this->dataLoaded = false;
        $this->extraDataLoaded = false;
 
        $this->assertRepoDefined();
        $this->assertTitleDefined();
    }
 
    public function getRepo() {
        return $this->repo;
    }
 
    protected function getCacheKey() {
        return $this->repo->getSharedCacheKey( 'file', sha1( $this->getName() ) );
    }
 
    public function getMutableCacheKeys( WANObjectCache $cache ) {
        return [ $this->getCacheKey() ];
    }
 
    private function loadFromCache() {
        $this->dataLoaded = false;
        $this->extraDataLoaded = false;
 
        $key = $this->getCacheKey();
        if ( !$key ) {
            $this->loadFromDB( self::READ_NORMAL );
 
            return;
        }
 
        $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
        $cachedValues = $cache->getWithSetCallback(
            $key,
            $cache::TTL_WEEK,
            function ( $oldValue, &$ttl, array &$setOpts ) use ( $cache ) {
                $setOpts += Database::getCacheSetOptions( $this->repo->getReplicaDB() );
 
                $this->loadFromDB( self::READ_NORMAL );
 
                $fields = $this->getCacheFields( '' );
                $cacheVal = [];
                $cacheVal['fileExists'] = $this->fileExists;
                if ( $this->fileExists ) {
                    foreach ( $fields as $field ) {
                        $cacheVal[$field] = $this->$field;
                    }
                }
                if ( $this->user ) {
                    $cacheVal['user'] = $this->user->getId();
                    $cacheVal['user_text'] = $this->user->getName();
                }
 
                // Don't cache metadata items stored as blobs, since they tend to be large
                if ( $this->metadataBlobs ) {
                    $cacheVal['metadata'] = array_diff_key(
                        $this->metadataArray, $this->metadataBlobs );
                    // Save the blob addresses
                    $cacheVal['metadataBlobs'] = $this->metadataBlobs;
                } else {
                    $cacheVal['metadata'] = $this->metadataArray;
                }
 
                // Strip off excessive entries from the subset of fields that can become large.
                // If the cache value gets too large and might not fit in the cache,
                // causing repeat database queries for each access to the file.
                foreach ( $this->getLazyCacheFields( '' ) as $field ) {
                    if ( isset( $cacheVal[$field] )
                        && strlen( serialize( $cacheVal[$field] ) ) > 100 * 1024
                    ) {
                        unset( $cacheVal[$field] ); // don't let the value get too big
                        if ( $field === 'metadata' ) {
                            unset( $cacheVal['metadataBlobs'] );
                        }
                    }
                }
 
                if ( $this->fileExists ) {
                    $ttl = $cache->adaptiveTTL( wfTimestamp( TS_UNIX, $this->timestamp ), $ttl );
                } else {
                    $ttl = $cache::TTL_DAY;
                }
 
                return $cacheVal;
            },
            [ 'version' => self::VERSION ]
        );
 
        $this->fileExists = $cachedValues['fileExists'];
        if ( $this->fileExists ) {
            $this->setProps( $cachedValues );
        }
 
        $this->dataLoaded = true;
        $this->extraDataLoaded = true;
        foreach ( $this->getLazyCacheFields( '' ) as $field ) {
            $this->extraDataLoaded = $this->extraDataLoaded && isset( $cachedValues[$field] );
        }
    }
 
    public function invalidateCache() {
        $key = $this->getCacheKey();
        if ( !$key ) {
            return;
        }
 
        $this->repo->getPrimaryDB()->onTransactionPreCommitOrIdle(
            static function () use ( $key ) {
                MediaWikiServices::getInstance()->getMainWANObjectCache()->delete( $key );
            },
            __METHOD__
        );
    }
 
    public function loadFromFile( $path = null ) {
        $props = $this->repo->getFileProps( $path ?? $this->getVirtualUrl() );
        $this->setProps( $props );
    }
 
    protected function getCacheFields( $prefix = 'img_' ) {
        if ( $prefix !== '' ) {
            throw new InvalidArgumentException(
                __METHOD__ . ' with a non-empty prefix is no longer supported.'
            );
        }
 
        // See self::getQueryInfo() for the fetching of the data from the DB,
        // self::loadFromRow() for the loading of the object from the DB row,
        // and self::loadFromCache() for the caching, and self::setProps() for
        // populating the object from an array of data.
        return [ 'size', 'width', 'height', 'bits', 'media_type',
            'major_mime', 'minor_mime', 'timestamp', 'sha1', 'description' ];
    }
 
    protected function getLazyCacheFields( $prefix = 'img_' ) {
        if ( $prefix !== '' ) {
            throw new InvalidArgumentException(
                __METHOD__ . ' with a non-empty prefix is no longer supported.'
            );
        }
 
        // Keep this in sync with the omit-lazy option in self::getQueryInfo().
        return [ 'metadata' ];
    }
 
    protected function loadFromDB( $flags = 0 ) {
        $fname = static::class . '::' . __FUNCTION__;
 
        # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
        $this->dataLoaded = true;
        $this->extraDataLoaded = true;
 
        $dbr = ( $flags & self::READ_LATEST )
            ? $this->repo->getPrimaryDB()
            : $this->repo->getReplicaDB();
 
        $fileQuery = static::getQueryInfo();
        $row = $dbr->selectRow(
            $fileQuery['tables'],
            $fileQuery['fields'],
            [ 'img_name' => $this->getName() ],
            $fname,
            [],
            $fileQuery['joins']
        );
 
        if ( $row ) {
            $this->loadFromRow( $row );
        } else {
            $this->fileExists = false;
        }
    }
 
    protected function loadExtraFromDB() {
        if ( !$this->title ) {
            return; // Avoid hard failure when the file does not exist. T221812
        }
 
        $fname = static::class . '::' . __FUNCTION__;
 
        # Unconditionally set loaded=true, we don't want the accessors constantly rechecking
        $this->extraDataLoaded = true;
 
        $db = $this->repo->getReplicaDB();
        $fieldMap = $this->loadExtraFieldsWithTimestamp( $db, $fname );
        if ( !$fieldMap ) {
            $db = $this->repo->getPrimaryDB();
            $fieldMap = $this->loadExtraFieldsWithTimestamp( $db, $fname );
        }
 
        if ( $fieldMap ) {
            if ( isset( $fieldMap['metadata'] ) ) {
                $this->loadMetadataFromDbFieldValue( $db, $fieldMap['metadata'] );
            }
        } else {
            throw new MWException( "Could not find data for image '{$this->getName()}'." );
        }
    }
 
    private function loadExtraFieldsWithTimestamp( $dbr, $fname ) {
        $fieldMap = false;
 
        $fileQuery = self::getQueryInfo( [ 'omit-nonlazy' ] );
        $row = $dbr->selectRow(
            $fileQuery['tables'],
            $fileQuery['fields'],
            [
                'img_name' => $this->getName(),
                'img_timestamp' => $dbr->timestamp( $this->getTimestamp() ),
            ],
            $fname,
            [],
            $fileQuery['joins']
        );
        if ( $row ) {
            $fieldMap = $this->unprefixRow( $row, 'img_' );
        } else {
            # File may have been uploaded over in the meantime; check the old versions
            $fileQuery = OldLocalFile::getQueryInfo( [ 'omit-nonlazy' ] );
            $row = $dbr->selectRow(
                $fileQuery['tables'],
                $fileQuery['fields'],
                [
                    'oi_name' => $this->getName(),
                    'oi_timestamp' => $dbr->timestamp( $this->getTimestamp() ),
                ],
                $fname,
                [],
                $fileQuery['joins']
            );
            if ( $row ) {
                $fieldMap = $this->unprefixRow( $row, 'oi_' );
            }
        }
 
        return $fieldMap;
    }
 
    protected function unprefixRow( $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 = [];
        foreach ( $array as $name => $value ) {
            $decoded[substr( $name, $prefixLength )] = $value;
        }
 
        return $decoded;
    }
 
    public function loadFromRow( $row, $prefix = 'img_' ) {
        $this->dataLoaded = true;
 
        $unprefixed = $this->unprefixRow( $row, $prefix );
 
        $this->name = $unprefixed['name'];
        $this->media_type = $unprefixed['media_type'];
 
        $this->description = MediaWikiServices::getInstance()->getCommentStore()
            ->getComment( "{$prefix}description", $row )->text;
 
        $this->user = User::newFromAnyId(
            $unprefixed['user'] ?? null,
            $unprefixed['user_text'] ?? null,
            $unprefixed['actor'] ?? null
        );
 
        $this->timestamp = wfTimestamp( TS_MW, $unprefixed['timestamp'] );
 
        $this->loadMetadataFromDbFieldValue(
            $this->repo->getReplicaDB(), $unprefixed['metadata'] );
 
        if ( empty( $unprefixed['major_mime'] ) ) {
            $this->major_mime = 'unknown';
            $this->minor_mime = 'unknown';
            $this->mime = 'unknown/unknown';
        } else {
            if ( !$unprefixed['minor_mime'] ) {
                $unprefixed['minor_mime'] = 'unknown';
            }
            $this->major_mime = $unprefixed['major_mime'];
            $this->minor_mime = $unprefixed['minor_mime'];
            $this->mime = $unprefixed['major_mime'] . '/' . $unprefixed['minor_mime'];
        }
 
        // Trim zero padding from char/binary field
        $this->sha1 = rtrim( $unprefixed['sha1'], "\0" );
 
        // Normalize some fields to integer type, per their database definition.
        // Use unary + so that overflows will be upgraded to double instead of
        // being trucated as with intval(). This is important to allow > 2 GiB
        // files on 32-bit systems.
        $this->size = +$unprefixed['size'];
        $this->width = +$unprefixed['width'];
        $this->height = +$unprefixed['height'];
        $this->bits = +$unprefixed['bits'];
 
        // Check for extra fields (deprecated since MW 1.37)
        $extraFields = array_diff(
            array_keys( $unprefixed ),
            [
                'name', 'media_type', 'description_text', 'description_data',
                'description_cid', 'user', 'user_text', 'actor', 'timestamp',
                'metadata', 'major_mime', 'minor_mime', 'sha1', 'size', 'width',
                'height', 'bits'
            ]
        );
        if ( $extraFields ) {
            wfDeprecatedMsg(
                'Passing extra fields (' .
                implode( ', ', $extraFields )
                . ') to ' . __METHOD__ . ' was deprecated in MediaWiki 1.37. ' .
                'Property assignment will be removed in a later version.',
                '1.37' );
            foreach ( $extraFields as $field ) {
                $this->$field = $unprefixed[$field];
            }
        }
 
        $this->fileExists = true;
    }
 
    public function load( $flags = 0 ) {
        if ( !$this->dataLoaded ) {
            if ( $flags & self::READ_LATEST ) {
                $this->loadFromDB( $flags );
            } else {
                $this->loadFromCache();
            }
        }
 
        if ( ( $flags & self::LOAD_ALL ) && !$this->extraDataLoaded ) {
            // @note: loads on name/timestamp to reduce race condition problems
            $this->loadExtraFromDB();
        }
    }
 
    public function maybeUpgradeRow() {
        if ( wfReadOnly() || $this->upgrading ) {
            return;
        }
 
        $upgrade = false;
        $reserialize = false;
        if ( $this->media_type === null || $this->mime == 'image/svg' ) {
            $upgrade = true;
        } else {
            $handler = $this->getHandler();
            if ( $handler ) {
                $validity = $handler->isFileMetadataValid( $this );
                if ( $validity === MediaHandler::METADATA_BAD ) {
                    $upgrade = true;
                } elseif ( $validity === MediaHandler::METADATA_COMPATIBLE
                    && $this->repo->isMetadataUpdateEnabled()
                ) {
                    $upgrade = true;
                } elseif ( $this->repo->isJsonMetadataEnabled()
                    && $this->repo->isMetadataReserializeEnabled()
                ) {
                    if ( $this->repo->isSplitMetadataEnabled() && $this->isMetadataOversize() ) {
                        $reserialize = true;
                    } elseif ( $this->metadataSerializationFormat !== self::MDS_EMPTY &&
                        $this->metadataSerializationFormat !== self::MDS_JSON ) {
                        $reserialize = true;
                    }
                }
            }
        }
 
        if ( $upgrade || $reserialize ) {
            $this->upgrading = true;
            // Defer updates unless in auto-commit CLI mode
            DeferredUpdates::addCallableUpdate( function () use ( $upgrade ) {
                $this->upgrading = false; // avoid duplicate updates
                try {
                    if ( $upgrade ) {
                        $this->upgradeRow();
                    } else {
                        $this->reserializeMetadata();
                    }
                } catch ( LocalFileLockError $e ) {
                    // let the other process handle it (or do it next time)
                }
            } );
        }
    }
 
    public function getUpgraded() {
        return $this->upgraded;
    }
 
    public function upgradeRow() {
        $this->lock();
 
        $this->loadFromFile();
 
        # Don't destroy file info of missing files
        if ( !$this->fileExists ) {
            $this->unlock();
            wfDebug( __METHOD__ . ": file does not exist, aborting" );
 
            return;
        }
 
        $dbw = $this->repo->getPrimaryDB();
        list( $major, $minor ) = self::splitMime( $this->mime );
 
        if ( wfReadOnly() ) {
            $this->unlock();
 
            return;
        }
        wfDebug( __METHOD__ . ': upgrading ' . $this->getName() . " to the current schema" );
 
        $dbw->update( 'image',
            [
                'img_size' => $this->size, // sanity
                '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->getMetadataForDb( $dbw ),
                'img_sha1' => $this->sha1,
            ],
            [ 'img_name' => $this->getName() ],
            __METHOD__
        );
 
        $this->invalidateCache();
 
        $this->unlock();
        $this->upgraded = true; // avoid rework/retries
    }
 
    protected function reserializeMetadata() {
        if ( wfReadOnly() ) {
            return;
        }
        $dbw = $this->repo->getPrimaryDB();
        $dbw->update(
            'image',
            [ 'img_metadata' => $this->getMetadataForDb( $dbw ) ],
            [
                'img_name' => $this->name,
                'img_timestamp' => $dbw->timestamp( $this->timestamp ),
            ],
            __METHOD__
        );
        $this->upgraded = true;
    }
 
    protected function setProps( $info ) {
        $this->dataLoaded = true;
        $fields = $this->getCacheFields( '' );
        $fields[] = 'fileExists';
 
        foreach ( $fields as $field ) {
            if ( isset( $info[$field] ) ) {
                $this->$field = $info[$field];
            }
        }
 
        // Only our own cache sets these properties, so they both should be present.
        if ( isset( $info['user'] ) &&
            isset( $info['user_text'] ) &&
            $info['user_text'] !== ''
        ) {
            $this->user = new UserIdentityValue( $info['user'], $info['user_text'] );
        }
 
        // 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 );
        }
 
        if ( isset( $info['metadata'] ) ) {
            if ( is_string( $info['metadata'] ) ) {
                $this->loadMetadataFromString( $info['metadata'] );
            } elseif ( is_array( $info['metadata'] ) ) {
                $this->metadataArray = $info['metadata'];
                if ( isset( $info['metadataBlobs'] ) ) {
                    $this->metadataBlobs = $info['metadataBlobs'];
                    $this->unloadedMetadataBlobs = array_diff_key(
                        $this->metadataBlobs,
                        $this->metadataArray
                    );
                } else {
                    $this->metadataBlobs = [];
                    $this->unloadedMetadataBlobs = [];
                }
            } else {
                $logger = LoggerFactory::getInstance( 'LocalFile' );
                $logger->warning( __METHOD__ . ' given invalid metadata of type ' .
                    gettype( $info['metadata'] ) );
                $this->metadataArray = [];
            }
            $this->extraDataLoaded = true;
        }
    }
 
    public function isMissing() {
        if ( $this->missing === null ) {
            $fileExists = $this->repo->fileExists( $this->getVirtualUrl() );
            $this->missing = !$fileExists;
        }
 
        return $this->missing;
    }
 
    public function getWidth( $page = 1 ) {
        $page = (int)$page;
        if ( $page < 1 ) {
            $page = 1;
        }
 
        $this->load();
 
        if ( $this->isMultipage() ) {
            $handler = $this->getHandler();
            if ( !$handler ) {
                return 0;
            }
            $dim = $handler->getPageDimensions( $this, $page );
            if ( $dim ) {
                return $dim['width'];
            } else {
                // For non-paged media, the false goes through an
                // intval, turning failure into 0, so do same here.
                return 0;
            }
        } else {
            return $this->width;
        }
    }
 
    public function getHeight( $page = 1 ) {
        $page = (int)$page;
        if ( $page < 1 ) {
            $page = 1;
        }
 
        $this->load();
 
        if ( $this->isMultipage() ) {
            $handler = $this->getHandler();
            if ( !$handler ) {
                return 0;
            }
            $dim = $handler->getPageDimensions( $this, $page );
            if ( $dim ) {
                return $dim['height'];
            } else {
                // For non-paged media, the false goes through an
                // intval, turning failure into 0, so do same here.
                return 0;
            }
        } else {
            return $this->height;
        }
    }
 
    public function getDescriptionShortUrl() {
        if ( !$this->title ) {
            return null; // Avoid hard failure when the file does not exist. T221812
        }
 
        $pageId = $this->title->getArticleID();
 
        if ( $pageId ) {
            $url = $this->repo->makeUrl( [ 'curid' => $pageId ] );
            if ( $url !== false ) {
                return $url;
            }
        }
        return null;
    }
 
    public function getMetadata() {
        $data = $this->getMetadataArray();
        if ( !$data ) {
            return '';
        } elseif ( array_keys( $data ) === [ '_error' ] ) {
            // Legacy error encoding
            return $data['_error'];
        } else {
            return serialize( $this->getMetadataArray() );
        }
    }
 
    public function getMetadataArray(): array {
        $this->load( self::LOAD_ALL );
        if ( $this->unloadedMetadataBlobs ) {
            return $this->getMetadataItems(
                array_unique( array_merge(
                    array_keys( $this->metadataArray ),
                    array_keys( $this->unloadedMetadataBlobs )
                ) )
            );
        }
        return $this->metadataArray;
    }
 
    public function getMetadataItems( array $itemNames ): array {
        $this->load( self::LOAD_ALL );
        $result = [];
        $addresses = [];
        foreach ( $itemNames as $itemName ) {
            if ( array_key_exists( $itemName, $this->metadataArray ) ) {
                $result[$itemName] = $this->metadataArray[$itemName];
            } elseif ( isset( $this->unloadedMetadataBlobs[$itemName] ) ) {
                $addresses[$itemName] = $this->unloadedMetadataBlobs[$itemName];
            }
        }
        if ( $addresses ) {
            $blobStore = $this->repo->getBlobStore();
            if ( !$blobStore ) {
                LoggerFactory::getInstance( 'LocalFile' )->warning(
                    "Unable to load metadata: repo has no blob store" );
                return $result;
            }
            $status = $blobStore->getBlobBatch( $addresses );
            if ( !$status->isGood() ) {
                $msg = Status::wrap( $status )->getWikiText(
                    false, false, 'en' );
                LoggerFactory::getInstance( 'LocalFile' )->warning(
                    "Error loading metadata from BlobStore: $msg" );
            }
            foreach ( $addresses as $itemName => $address ) {
                unset( $this->unloadedMetadataBlobs[$itemName] );
                $json = $status->getValue()[$address] ?? null;
                if ( $json !== null ) {
                    $value = $this->jsonDecode( $json );
                    $result[$itemName] = $value;
                    $this->metadataArray[$itemName] = $value;
                }
            }
        }
        return $result;
    }
 
    private function jsonEncode( $data ): string {
        $s = json_encode( $data,
            JSON_INVALID_UTF8_IGNORE |
            JSON_UNESCAPED_SLASHES |
            JSON_UNESCAPED_UNICODE );
        if ( $s === false ) {
            throw new MWException( __METHOD__ . ': metadata is not JSON-serializable ' .
                '(type = ' . $this->getMimeType() . ')' );
        }
        return $s;
    }
 
    private function jsonDecode( string $s ) {
        // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
        return @json_decode( $s, true, 512, JSON_INVALID_UTF8_IGNORE );
    }
 
    public function getMetadataForDb( IDatabase $db ) {
        $this->load( self::LOAD_ALL );
        if ( !$this->metadataArray && !$this->metadataBlobs ) {
            $s = '';
        } elseif ( $this->repo->isJsonMetadataEnabled() ) {
            $s = $this->getJsonMetadata();
        } else {
            $s = serialize( $this->getMetadataArray() );
        }
        if ( !is_string( $s ) ) {
            throw new MWException( 'Could not serialize image metadata value for DB' );
        }
        return $db->encodeBlob( $s );
    }
 
    private function getJsonMetadata() {
        // Directly store data that is not already in BlobStore
        $envelope = [
            'data' => array_diff_key( $this->metadataArray, $this->metadataBlobs )
        ];
 
        // Also store the blob addresses
        if ( $this->metadataBlobs ) {
            $envelope['blobs'] = $this->metadataBlobs;
        }
 
        // Try encoding
        $s = $this->jsonEncode( $envelope );
 
        // Decide whether to try splitting the metadata.
        // Return early if it's not going to happen.
        if ( !$this->repo->isSplitMetadataEnabled()
            || !$this->getHandler()
            || !$this->getHandler()->useSplitMetadata()
        ) {
            return $s;
        }
        $threshold = $this->repo->getSplitMetadataThreshold();
        if ( !$threshold || strlen( $s ) <= $threshold ) {
            return $s;
        }
        $blobStore = $this->repo->getBlobStore();
        if ( !$blobStore ) {
            return $s;
        }
 
        // The data as a whole is above the item threshold. Look for
        // large items that can be split out.
        $blobAddresses = [];
        foreach ( $envelope['data'] as $name => $value ) {
            $encoded = $this->jsonEncode( $value );
            if ( strlen( $encoded ) > $threshold ) {
                $blobAddresses[$name] = $blobStore->storeBlob(
                    $encoded,
                    [ BlobStore::IMAGE_HINT => $this->getName() ]
                );
            }
        }
        // Remove any items that were split out
        $envelope['data'] = array_diff_key( $envelope['data'], $blobAddresses );
        $envelope['blobs'] = $blobAddresses;
        $s = $this->jsonEncode( $envelope );
 
        // Repeated calls to this function should not keep inserting more blobs
        $this->metadataBlobs += $blobAddresses;
 
        return $s;
    }
 
    private function isMetadataOversize() {
        if ( !$this->repo->isSplitMetadataEnabled() ) {
            return false;
        }
        $threshold = $this->repo->getSplitMetadataThreshold();
        $directItems = array_diff_key( $this->metadataArray, $this->metadataBlobs );
        foreach ( $directItems as $value ) {
            if ( strlen( $this->jsonEncode( $value ) ) > $threshold ) {
                return true;
            }
        }
        return false;
    }
 
    protected function loadMetadataFromDbFieldValue( IDatabase $db, $metadataBlob ) {
        $this->loadMetadataFromString( $db->decodeBlob( $metadataBlob ) );
    }
 
    protected function loadMetadataFromString( $metadataString ) {
        $this->extraDataLoaded = true;
        $this->metadataArray = [];
        $this->metadataBlobs = [];
        $this->unloadedMetadataBlobs = [];
        $metadataString = (string)$metadataString;
        if ( $metadataString === '' ) {
            $this->metadataSerializationFormat = self::MDS_EMPTY;
            return;
        }
        if ( $metadataString[0] === '{' ) {
            $envelope = $this->jsonDecode( $metadataString );
            if ( !$envelope ) {
                // Legacy error encoding
                $this->metadataArray = [ '_error' => $metadataString ];
                $this->metadataSerializationFormat = self::MDS_LEGACY;
            } else {
                $this->metadataSerializationFormat = self::MDS_JSON;
                if ( isset( $envelope['data'] ) ) {
                    $this->metadataArray = $envelope['data'];
                }
                if ( isset( $envelope['blobs'] ) ) {
                    $this->metadataBlobs = $this->unloadedMetadataBlobs = $envelope['blobs'];
                }
            }
        } else {
            // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
            $data = @unserialize( $metadataString );
            if ( !is_array( $data ) ) {
                // Legacy error encoding
                $data = [ '_error' => $metadataString ];
                $this->metadataSerializationFormat = self::MDS_LEGACY;
            } else {
                $this->metadataSerializationFormat = self::MDS_PHP;
            }
            $this->metadataArray = $data;
        }
    }
 
    public function getBitDepth() {
        $this->load();
 
        return (int)$this->bits;
    }
 
    public function getSize() {
        $this->load();
 
        return $this->size;
    }
 
    public function getMimeType() {
        $this->load();
 
        return $this->mime;
    }
 
    public function getMediaType() {
        $this->load();
 
        return $this->media_type;
    }
 
    public function exists() {
        $this->load();
 
        return $this->fileExists;
    }
 
    protected function getThumbnails( $archiveName = false ) {
        if ( $archiveName ) {
            $dir = $this->getArchiveThumbPath( $archiveName );
        } else {
            $dir = $this->getThumbPath();
        }
 
        $backend = $this->repo->getBackend();
        $files = [ $dir ];
        try {
            $iterator = $backend->getFileList( [ 'dir' => $dir ] );
            if ( $iterator !== null ) {
                foreach ( $iterator as $file ) {
                    $files[] = $file;
                }
            }
        } catch ( FileBackendError $e ) {
        } // suppress (T56674)
 
        return $files;
    }
 
    private function purgeMetadataCache() {
        $this->invalidateCache();
    }
 
    public function purgeCache( $options = [] ) {
        // Refresh metadata cache
        $this->maybeUpgradeRow();
        $this->purgeMetadataCache();
 
        // Delete thumbnails
        $this->purgeThumbnails( $options );
 
        // Purge CDN cache for this file
        $hcu = MediaWikiServices::getInstance()->getHtmlCacheUpdater();
        $hcu->purgeUrls(
            $this->getUrl(),
            !empty( $options['forThumbRefresh'] )
                ? $hcu::PURGE_PRESEND // just a manual purge
                : $hcu::PURGE_INTENT_TXROUND_REFLECTED
        );
    }
 
    public function purgeOldThumbnails( $archiveName ) {
        // Get a list of old thumbnails
        $thumbs = $this->getThumbnails( $archiveName );
 
        // Delete thumbnails from storage, and prevent the directory itself from being purged
        $dir = array_shift( $thumbs );
        $this->purgeThumbList( $dir, $thumbs );
 
        $urls = [];
        foreach ( $thumbs as $thumb ) {
            $urls[] = $this->getArchiveThumbUrl( $archiveName, $thumb );
        }
 
        // Purge any custom thumbnail caches
        $this->hookRunner->onLocalFilePurgeThumbnails( $this, $archiveName, $urls );
 
        // Purge the CDN
        $hcu = MediaWikiServices::getInstance()->getHtmlCacheUpdater();
        $hcu->purgeUrls( $urls, $hcu::PURGE_PRESEND );
    }
 
    public function purgeThumbnails( $options = [] ) {
        $thumbs = $this->getThumbnails();
 
        // Delete thumbnails from storage, and prevent the directory itself from being purged
        $dir = array_shift( $thumbs );
        $this->purgeThumbList( $dir, $thumbs );
 
        // Always purge all files from CDN regardless of handler filters
        $urls = [];
        foreach ( $thumbs as $thumb ) {
            $urls[] = $this->getThumbUrl( $thumb );
        }
 
        // Give the media handler a chance to filter the file purge list
        if ( !empty( $options['forThumbRefresh'] ) ) {
            $handler = $this->getHandler();
            if ( $handler ) {
                $handler->filterThumbnailPurgeList( $thumbs, $options );
            }
        }
 
        // Purge any custom thumbnail caches
        $this->getHookRunner()->onLocalFilePurgeThumbnails( $this, false, $urls );
 
        // Purge the CDN
        $hcu = MediaWikiServices::getInstance()->getHtmlCacheUpdater();
        $hcu->purgeUrls(
            $urls,
            !empty( $options['forThumbRefresh'] )
                ? $hcu::PURGE_PRESEND // just a manual purge
                : $hcu::PURGE_INTENT_TXROUND_REFLECTED
        );
    }
 
    public function prerenderThumbnails() {
        global $wgUploadThumbnailRenderMap;
 
        $jobs = [];
 
        $sizes = $wgUploadThumbnailRenderMap;
        rsort( $sizes );
 
        foreach ( $sizes as $size ) {
            if ( $this->isMultipage() ) {
                for ( $page = 1; $page <= $this->pageCount(); $page++ ) {
                    $jobs[] = new ThumbnailRenderJob(
                        $this->getTitle(),
                        [ 'transformParams' => [
                            'width' => $size,
                            'page' => $page,
                        ] ]
                    );
                }
            } elseif ( $this->isVectorized() || $this->getWidth() > $size ) {
                $jobs[] = new ThumbnailRenderJob(
                    $this->getTitle(),
                    [ 'transformParams' => [ 'width' => $size ] ]
                );
            }
        }
 
        if ( $jobs ) {
            JobQueueGroup::singleton()->lazyPush( $jobs );
        }
    }
 
    protected function purgeThumbList( $dir, $files ) {
        $fileListDebug = strtr(
            var_export( $files, true ),
            [ "\n" => '' ]
        );
        wfDebug( __METHOD__ . ": $fileListDebug" );
 
        if ( $this->repo->supportsSha1URLs() ) {
            $reference = $this->getSha1();
        } else {
            $reference = $this->getName();
        }
 
        $purgeList = [];
        foreach ( $files as $file ) {
            # Check that the reference (filename or sha1) is part of the thumb name
            # This is a basic sanity check to avoid erasing unrelated directories
            if ( strpos( $file, $reference ) !== false
                || strpos( $file, "-thumbnail" ) !== false // "short" thumb name
            ) {
                $purgeList[] = "{$dir}/{$file}";
            }
        }
 
        # Delete the thumbnails
        $this->repo->quickPurgeBatch( $purgeList );
        # Clear out the thumbnail directory if empty
        $this->repo->quickCleanDir( $dir );
    }
 
    public function getHistory( $limit = null, $start = null, $end = null, $inc = true ) {
        if ( !$this->exists() ) {
            return []; // Avoid hard failure when the file does not exist. T221812
        }
 
        $dbr = $this->repo->getReplicaDB();
        $oldFileQuery = OldLocalFile::getQueryInfo();
 
        $tables = $oldFileQuery['tables'];
        $fields = $oldFileQuery['fields'];
        $join_conds = $oldFileQuery['joins'];
        $conds = $opts = [];
        $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'] = [ 'oldimage' => 'oi_name_timestamp' ];
 
        $this->getHookRunner()->onLocalFile__getHistory( $this, $tables, $fields,
            $conds, $opts, $join_conds );
 
        $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $opts, $join_conds );
        $r = [];
 
        foreach ( $res as $row ) {
            $r[] = $this->repo->newFileFromRow( $row );
        }
 
        if ( $order == 'ASC' ) {
            $r = array_reverse( $r ); // make sure it ends up descending
        }
 
        return $r;
    }
 
    public function nextHistoryLine() {
        if ( !$this->exists() ) {
            return false; // Avoid hard failure when the file does not exist. T221812
        }
 
        # Polymorphic function name to distinguish foreign and local fetches
        $fname = static::class . '::' . __FUNCTION__;
 
        $dbr = $this->repo->getReplicaDB();
 
        if ( $this->historyLine == 0 ) { // called for the first time, return line from cur
            $fileQuery = self::getQueryInfo();
            $this->historyRes = $dbr->select( $fileQuery['tables'],
                $fileQuery['fields'] + [
                    'oi_archive_name' => $dbr->addQuotes( '' ),
                    'oi_deleted' => 0,
                ],
                [ 'img_name' => $this->title->getDBkey() ],
                $fname,
                [],
                $fileQuery['joins']
            );
 
            if ( $dbr->numRows( $this->historyRes ) == 0 ) {
                $this->historyRes = null;
 
                return false;
            }
        } elseif ( $this->historyLine == 1 ) {
            $fileQuery = OldLocalFile::getQueryInfo();
            $this->historyRes = $dbr->select(
                $fileQuery['tables'],
                $fileQuery['fields'],
                [ 'oi_name' => $this->title->getDBkey() ],
                $fname,
                [ 'ORDER BY' => 'oi_timestamp DESC' ],
                $fileQuery['joins']
            );
        }
        $this->historyLine++;
 
        return $dbr->fetchObject( $this->historyRes );
    }
 
    public function resetHistory() {
        $this->historyLine = 0;
 
        if ( $this->historyRes !== null ) {
            $this->historyRes = null;
        }
    }
 
    public function upload( $src, $comment, $pageText, $flags = 0, $props = false,
        $timestamp = false, Authority $uploader = null, $tags = [],
        $createNullRevision = true, $revert = false
    ) {
        if ( $this->getRepo()->getReadOnlyReason() !== false ) {
            return $this->readOnlyFatalStatus();
        } elseif ( MediaWikiServices::getInstance()->getRevisionStore()->isReadOnly() ) {
            // Check this in advance to avoid writing to FileBackend and the file tables,
            // only to fail on insert the revision due to the text store being unavailable.
            return $this->readOnlyFatalStatus();
        }
 
        $srcPath = ( $src instanceof FSFile ) ? $src->getPath() : $src;
        if ( !$props ) {
            if ( FileRepo::isVirtualUrl( $srcPath )
                || FileBackend::isStoragePath( $srcPath )
            ) {
                $props = $this->repo->getFileProps( $srcPath );
            } else {
                $mwProps = new MWFileProps( MediaWikiServices::getInstance()->getMimeAnalyzer() );
                $props = $mwProps->getPropsFromPath( $srcPath, true );
            }
        }
 
        $options = [];
        $handler = MediaHandler::getHandler( $props['mime'] );
        if ( $handler ) {
            if ( is_string( $props['metadata'] ) ) {
                // This supports callers directly fabricating a metadata
                // property using serialize(). Normally the metadata property
                // comes from MWFileProps, in which case it won't be a string.
                // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
                $metadata = @unserialize( $props['metadata'] );
            } else {
                $metadata = $props['metadata'];
            }
 
            if ( is_array( $metadata ) ) {
                $options['headers'] = $handler->getContentHeaders( $metadata );
            }
        } else {
            $options['headers'] = [];
        }
 
        // Trim spaces on user supplied text
        $comment = trim( $comment );
 
        $this->lock();
        $status = $this->publish( $src, $flags, $options );
 
        if ( $status->successCount >= 2 ) {
            // There will be a copy+(one of move,copy,store).
            // The first succeeding does not commit us to updating the DB
            // since it simply copied the current version to a timestamped file name.
            // It is only *preferable* to avoid leaving such files orphaned.
            // Once the second operation goes through, then the current version was
            // updated and we must therefore update the DB too.
            $oldver = $status->value;
 
            if ( $uploader === null ) {
                // Uploader argument is optional, fall back to the context authority
                $uploader = RequestContext::getMain()->getAuthority();
            }
 
            $uploadStatus = $this->recordUpload3(
                $oldver,
                $comment,
                $pageText,
                $uploader,
                $props,
                $timestamp,
                $tags,
                $createNullRevision,
                $revert
            );
            if ( !$uploadStatus->isOK() ) {
                if ( $uploadStatus->hasMessage( 'filenotfound' ) ) {
                    // update filenotfound error with more specific path
                    $status->fatal( 'filenotfound', $srcPath );
                } else {
                    $status->merge( $uploadStatus );
                }
            }
        }
 
        $this->unlock();
        return $status;
    }
 
    public function recordUpload3(
        string $oldver,
        string $comment,
        string $pageText,
        Authority $performer,
        $props = false,
        $timestamp = false,
        $tags = [],
        bool $createNullRevision = true,
        bool $revert = false
    ): Status {
        $dbw = $this->repo->getPrimaryDB();
 
        # Imports or such might force a certain timestamp; otherwise we generate
        # it and can fudge it slightly to keep (name,timestamp) unique on re-upload.
        if ( $timestamp === false ) {
            $timestamp = $dbw->timestamp();
            $allowTimeKludge = true;
        } else {
            $allowTimeKludge = false;
        }
 
        $props = $props ?: $this->repo->getFileProps( $this->getVirtualUrl() );
        $props['description'] = $comment;
        $props['timestamp'] = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
        $this->setProps( $props );
 
        # Fail now if the file isn't there
        if ( !$this->fileExists ) {
            wfDebug( __METHOD__ . ": File " . $this->getRel() . " went missing!" );
 
            return Status::newFatal( 'filenotfound', $this->getRel() );
        }
 
        $actorNormalizaton = MediaWikiServices::getInstance()->getActorNormalization();
 
        $dbw->startAtomic( __METHOD__ );
 
        $actorId = $actorNormalizaton->acquireActorId( $performer->getUser(), $dbw );
        $this->user = $performer->getUser();
 
        # 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.
        $commentStore = MediaWikiServices::getInstance()->getCommentStore();
        $commentFields = $commentStore->insert( $dbw, 'img_description', $comment );
        $actorFields = [ 'img_actor' => $actorId ];
        $dbw->insert( 'image',
            [
                '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_metadata' => $this->getMetadataForDb( $dbw ),
                'img_sha1' => $this->sha1
            ] + $commentFields + $actorFields,
            __METHOD__,
            [ 'IGNORE' ]
        );
        $reupload = ( $dbw->affectedRows() == 0 );
 
        if ( $reupload ) {
            $row = $dbw->selectRow(
                'image',
                [ 'img_timestamp', 'img_sha1' ],
                [ 'img_name' => $this->getName() ],
                __METHOD__,
                [ 'LOCK IN SHARE MODE' ]
            );
 
            if ( $row && $row->img_sha1 === $this->sha1 ) {
                $dbw->endAtomic( __METHOD__ );
                wfDebug( __METHOD__ . ": File " . $this->getRel() . " already exists!" );
                $title = Title::newFromText( $this->getName(), NS_FILE );
                return Status::newFatal( 'fileexists-no-change', $title->getPrefixedText() );
            }
 
            if ( $allowTimeKludge ) {
                # Use LOCK IN SHARE MODE to ignore any transaction snapshotting
                $lUnixtime = $row ? wfTimestamp( TS_UNIX, $row->img_timestamp ) : false;
                # Avoid a timestamp that is not newer than the last version
                # TODO: the image/oldimage tables should be like page/revision with an ID field
                if ( $lUnixtime && wfTimestamp( TS_UNIX, $timestamp ) <= $lUnixtime ) {
                    sleep( 1 ); // fast enough re-uploads would go far in the future otherwise
                    $timestamp = $dbw->timestamp( $lUnixtime + 1 );
                    $this->timestamp = wfTimestamp( TS_MW, $timestamp ); // DB -> TS_MW
                }
            }
 
            $tables = [ 'image' ];
            $fields = [
                '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_description_id' => 'img_description_id',
                'oi_timestamp' => 'img_timestamp',
                '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',
                'oi_actor' => 'img_actor',
            ];
            $joins = [];
 
            # (T36993) Note: $oldver can be empty here, if the previous
            # version of the file was broken. Allow registration of the new
            # version to continue anyway, because that's better than having
            # an image that's not fixable by user operations.
            # Collision, this is an update of a file
            # Insert previous contents into oldimage
            $dbw->insertSelect( 'oldimage', $tables, $fields,
                [ 'img_name' => $this->getName() ], __METHOD__, [], [], $joins );
 
            # Update the current image row
            $dbw->update( 'image',
                [
                    '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_metadata' => $this->getMetadataForDb( $dbw ),
                    'img_sha1' => $this->sha1
                ] + $commentFields + $actorFields,
                [ 'img_name' => $this->getName() ],
                __METHOD__
            );
        }
 
        $descTitle = $this->getTitle();
        $descId = $descTitle->getArticleID();
        $wikiPage = new WikiFilePage( $descTitle );
        $wikiPage->setFile( $this );
 
        // Determine log action. If reupload is done by reverting, use a special log_action.
        if ( $revert ) {
            $logAction = 'revert';
        } elseif ( $reupload ) {
            $logAction = 'overwrite';
        } else {
            $logAction = 'upload';
        }
        // Add the log entry...
        $logEntry = new ManualLogEntry( 'upload', $logAction );
        $logEntry->setTimestamp( $this->timestamp );
        $logEntry->setPerformer( $performer->getUser() );
        $logEntry->setComment( $comment );
        $logEntry->setTarget( $descTitle );
        // Allow people using the api to associate log entries with the upload.
        // Log has a timestamp, but sometimes different from upload timestamp.
        $logEntry->setParameters(
            [
                'img_sha1' => $this->sha1,
                'img_timestamp' => $timestamp,
            ]
        );
        // Note we keep $logId around since during new image
        // creation, page doesn't exist yet, so log_page = 0
        // but we want it to point to the page we're making,
        // so we later modify the log entry.
        // For a similar reason, we avoid making an RC entry
        // now and wait until the page exists.
        $logId = $logEntry->insert();
 
        if ( $descTitle->exists() ) {
            if ( $createNullRevision ) {
                $revStore = MediaWikiServices::getInstance()->getRevisionStore();
                // Use own context to get the action text in content language
                $formatter = LogFormatter::newFromEntry( $logEntry );
                $formatter->setContext( RequestContext::newExtraneousContext( $descTitle ) );
                $editSummary = $formatter->getPlainActionText();
                $summary = CommentStoreComment::newUnsavedComment( $editSummary );
                $nullRevRecord = $revStore->newNullRevision(
                    $dbw,
                    $descTitle,
                    $summary,
                    false,
                    $performer->getUser()
                );
 
                if ( $nullRevRecord ) {
                    $inserted = $revStore->insertRevisionOn( $nullRevRecord, $dbw );
 
                    $this->getHookRunner()->onRevisionFromEditComplete(
                        $wikiPage,
                        $inserted,
                        $inserted->getParentId(),
                        $performer->getUser(),
                        $tags
                    );
 
                    $wikiPage->updateRevisionOn( $dbw, $inserted );
                    // Associate null revision id
                    $logEntry->setAssociatedRevId( $inserted->getId() );
                }
            }
 
            $newPageContent = null;
        } else {
            // Make the description page and RC log entry post-commit
            $newPageContent = ContentHandler::makeContent( $pageText, $descTitle );
        }
 
        // NOTE: Even after ending this atomic section, we are probably still in the transaction
        //       started by the call to lock() in publishTo(). We cannot yet safely schedule jobs,
        //       see T263301.
        $dbw->endAtomic( __METHOD__ );
        $fname = __METHOD__;
 
        # Do some cache purges after final commit so that:
        # a) Changes are more likely to be seen post-purge
        # b) They won't cause rollback of the log publish/update above
        $purgeUpdate = new AutoCommitUpdate(
            $dbw,
            __METHOD__,
            function () use (
                $reupload, $wikiPage, $newPageContent, $comment, $performer,
                $logEntry, $logId, $descId, $tags, $fname
            ) {
                # Update memcache after the commit
                $this->invalidateCache();
 
                $updateLogPage = false;
                if ( $newPageContent ) {
                    # New file page; create the description page.
                    # There's already a log entry, so don't make a second RC entry
                    # CDN and file cache for the description page are purged by doUserEditContent.
                    $status = $wikiPage->doUserEditContent(
                        $newPageContent,
                        $performer,
                        $comment,
                        EDIT_NEW | EDIT_SUPPRESS_RC
                    );
 
                    if ( isset( $status->value['revision-record'] ) ) {
                        $revRecord = $status->value['revision-record'];
                        // Associate new page revision id
                        $logEntry->setAssociatedRevId( $revRecord->getId() );
                    }
                    // This relies on the resetArticleID() call in WikiPage::insertOn(),
                    // which is triggered on $descTitle by doUserEditContent() above.
                    if ( isset( $status->value['revision-record'] ) ) {
                        $revRecord = $status->value['revision-record'];
                        $updateLogPage = $revRecord->getPageId();
                    }
                } else {
                    # Existing file page: invalidate description page cache
                    $title = $wikiPage->getTitle();
                    $title->invalidateCache();
                    $hcu = MediaWikiServices::getInstance()->getHtmlCacheUpdater();
                    $hcu->purgeTitleUrls( $title, $hcu::PURGE_INTENT_TXROUND_REFLECTED );
                    # Allow the new file version to be patrolled from the page footer
                    Article::purgePatrolFooterCache( $descId );
                }
 
                # Update associated rev id. This should be done by $logEntry->insert() earlier,
                # but setAssociatedRevId() wasn't called at that point yet...
                $logParams = $logEntry->getParameters();
                $logParams['associated_rev_id'] = $logEntry->getAssociatedRevId();
                $update = [ 'log_params' => LogEntryBase::makeParamBlob( $logParams ) ];
                if ( $updateLogPage ) {
                    # Also log page, in case where we just created it above
                    $update['log_page'] = $updateLogPage;
                }
                $this->getRepo()->getPrimaryDB()->update(
                    'logging',
                    $update,
                    [ 'log_id' => $logId ],
                    $fname
                );
                $this->getRepo()->getPrimaryDB()->insert(
                    'log_search',
                    [
                        'ls_field' => 'associated_rev_id',
                        'ls_value' => (string)$logEntry->getAssociatedRevId(),
                        'ls_log_id' => $logId,
                    ],
                    $fname
                );
 
                # Add change tags, if any
                if ( $tags ) {
                    $logEntry->addTags( $tags );
                }
 
                # Uploads can be patrolled
                $logEntry->setIsPatrollable( true );
 
                # Now that the log entry is up-to-date, make an RC entry.
                $logEntry->publish( $logId );
 
                # Run hook for other updates (typically more cache purging)
                $this->getHookRunner()->onFileUpload( $this, $reupload, !$newPageContent );
 
                if ( $reupload ) {
                    # Delete old thumbnails
                    $this->purgeThumbnails();
                    # Remove the old file from the CDN cache
                    $hcu = MediaWikiServices::getInstance()->getHtmlCacheUpdater();
                    $hcu->purgeUrls( $this->getUrl(), $hcu::PURGE_INTENT_TXROUND_REFLECTED );
                } else {
                    # Update backlink pages pointing to this title if created
                    $blcFactory = MediaWikiServices::getInstance()->getBacklinkCacheFactory();
                    LinksUpdate::queueRecursiveJobsForTable(
                        $this->getTitle(),
                        'imagelinks',
                        'upload-image',
                        $performer->getUser()->getName(),
                        $blcFactory->getBacklinkCache( $this->getTitle() )
                    );
                }
 
                $this->prerenderThumbnails();
            }
        );
 
        # Invalidate cache for all pages using this file
        $cacheUpdateJob = HTMLCacheUpdateJob::newForBacklinks(
            $this->getTitle(),
            'imagelinks',
            [ 'causeAction' => 'file-upload', 'causeAgent' => $performer->getUser()->getName() ]
        );
 
        // NOTE: We are probably still in the transaction started by the call to lock() in
        //       publishTo(). We should only schedule jobs after that transaction was committed,
        //       so a job queue failure doesn't cause the upload to fail (T263301).
        //       Also, we should generally not schedule any Jobs or the DeferredUpdates that
        //       assume the update is complete until after the transaction has been committed and
        //       we are sure that the upload was indeed successful.
        $dbw->onTransactionCommitOrIdle( static function () use ( $reupload, $purgeUpdate, $cacheUpdateJob ) {
            DeferredUpdates::addUpdate( $purgeUpdate, DeferredUpdates::PRESEND );
 
            if ( !$reupload ) {
                // This is a new file, so update the image count
                DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => 1 ] ) );
            }
 
            JobQueueGroup::singleton()->lazyPush( $cacheUpdateJob );
        }, __METHOD__ );
 
        return Status::newGood();
    }
 
    public function publish( $src, $flags = 0, array $options = [] ) {
        return $this->publishTo( $src, $this->getRel(), $flags, $options );
    }
 
    protected function publishTo( $src, $dstRel, $flags = 0, array $options = [] ) {
        $srcPath = ( $src instanceof FSFile ) ? $src->getPath() : $src;
 
        $repo = $this->getRepo();
        if ( $repo->getReadOnlyReason() !== false ) {
            return $this->readOnlyFatalStatus();
        }
 
        $this->lock();
 
        if ( $this->isOld() ) {
            $archiveRel = $dstRel;
            $archiveName = basename( $archiveRel );
        } else {
            $archiveName = wfTimestamp( TS_MW ) . '!' . $this->getName();
            $archiveRel = $this->getArchiveRel( $archiveName );
        }
 
        if ( $repo->hasSha1Storage() ) {
            $sha1 = FileRepo::isVirtualUrl( $srcPath )
                ? $repo->getFileSha1( $srcPath )
                : FSFile::getSha1Base36FromPath( $srcPath );
            $wrapperBackend = $repo->getBackend();
            '@phan-var FileBackendDBRepoWrapper $wrapperBackend';
            $dst = $wrapperBackend->getPathForSHA1( $sha1 );
            $status = $repo->quickImport( $src, $dst );
            if ( $flags & File::DELETE_SOURCE ) {
                unlink( $srcPath );
            }
 
            if ( $this->exists() ) {
                $status->value = $archiveName;
            }
        } else {
            $flags = $flags & File::DELETE_SOURCE ? LocalRepo::DELETE_SOURCE : 0;
            $status = $repo->publish( $srcPath, $dstRel, $archiveRel, $flags, $options );
 
            if ( $status->value == 'new' ) {
                $status->value = '';
            } else {
                $status->value = $archiveName;
            }
        }
 
        $this->unlock();
        return $status;
    }
 
    public function move( $target ) {
        $localRepo = MediaWikiServices::getInstance()->getRepoGroup()->getLocalRepo();
        if ( $this->getRepo()->getReadOnlyReason() !== false ) {
            return $this->readOnlyFatalStatus();
        }
 
        wfDebugLog( 'imagemove', "Got request to move {$this->name} to " . $target->getText() );
        $batch = new LocalFileMoveBatch( $this, $target );
 
        $this->lock();
        $batch->addCurrent();
        $archiveNames = $batch->addOlds();
        $status = $batch->execute();
        $this->unlock();
 
        wfDebugLog( 'imagemove', "Finished moving {$this->name}" );
 
        // Purge the source and target files outside the transaction...
        $oldTitleFile = $localRepo->newFile( $this->title );
        $newTitleFile = $localRepo->newFile( $target );
        DeferredUpdates::addUpdate(
            new AutoCommitUpdate(
                $this->getRepo()->getPrimaryDB(),
                __METHOD__,
                static function () use ( $oldTitleFile, $newTitleFile, $archiveNames ) {
                    $oldTitleFile->purgeEverything();
                    foreach ( $archiveNames as $archiveName ) {
                        '@phan-var OldLocalFile $oldTitleFile';
                        $oldTitleFile->purgeOldThumbnails( $archiveName );
                    }
                    $newTitleFile->purgeEverything();
                }
            ),
            DeferredUpdates::PRESEND
        );
 
        if ( $status->isOK() ) {
            // Now switch the object
            $this->title = $target;
            // Force regeneration of the name and hashpath
            $this->name = null;
            $this->hashPath = null;
        }
 
        return $status;
    }
 
    public function deleteFile( $reason, UserIdentity $user, $suppress = false ) {
        if ( $this->getRepo()->getReadOnlyReason() !== false ) {
            return $this->readOnlyFatalStatus();
        }
 
        $batch = new LocalFileDeleteBatch( $this, $user, $reason, $suppress );
 
        $this->lock();
        $batch->addCurrent();
        // Get old version relative paths
        $archiveNames = $batch->addOlds();
        $status = $batch->execute();
        $this->unlock();
 
        if ( $status->isOK() ) {
            DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'images' => -1 ] ) );
        }
 
        // To avoid slow purges in the transaction, move them outside...
        DeferredUpdates::addUpdate(
            new AutoCommitUpdate(
                $this->getRepo()->getPrimaryDB(),
                __METHOD__,
                function () use ( $archiveNames ) {
                    $this->purgeEverything();
                    foreach ( $archiveNames as $archiveName ) {
                        $this->purgeOldThumbnails( $archiveName );
                    }
                }
            ),
            DeferredUpdates::PRESEND
        );
 
        // Purge the CDN
        $purgeUrls = [];
        foreach ( $archiveNames as $archiveName ) {
            $purgeUrls[] = $this->getArchiveUrl( $archiveName );
        }
 
        $hcu = MediaWikiServices::getInstance()->getHtmlCacheUpdater();
        $hcu->purgeUrls( $purgeUrls, $hcu::PURGE_INTENT_TXROUND_REFLECTED );
 
        return $status;
    }
 
    public function deleteOldFile( $archiveName, $reason, UserIdentity $user, $suppress = false ) {
        if ( $this->getRepo()->getReadOnlyReason() !== false ) {
            return $this->readOnlyFatalStatus();
        }
 
        $batch = new LocalFileDeleteBatch( $this, $user, $reason, $suppress );
 
        $this->lock();
        $batch->addOld( $archiveName );
        $status = $batch->execute();
        $this->unlock();
 
        $this->purgeOldThumbnails( $archiveName );
        if ( $status->isOK() ) {
            $this->purgeDescription();
        }
 
        $url = $this->getArchiveUrl( $archiveName );
        $hcu = MediaWikiServices::getInstance()->getHtmlCacheUpdater();
        $hcu->purgeUrls( $url, $hcu::PURGE_INTENT_TXROUND_REFLECTED );
 
        return $status;
    }
 
    public function restore( $versions = [], $unsuppress = false ) {
        if ( $this->getRepo()->getReadOnlyReason() !== false ) {
            return $this->readOnlyFatalStatus();
        }
 
        $batch = new LocalFileRestoreBatch( $this, $unsuppress );
 
        $this->lock();
        if ( !$versions ) {
            $batch->addAll();
        } else {
            $batch->addIds( $versions );
        }
        $status = $batch->execute();
        if ( $status->isGood() ) {
            $cleanupStatus = $batch->cleanup();
            $cleanupStatus->successCount = 0;
            $cleanupStatus->failCount = 0;
            $status->merge( $cleanupStatus );
        }
 
        $this->unlock();
        return $status;
    }
 
    public function getDescriptionUrl() {
        if ( !$this->title ) {
            return false; // Avoid hard failure when the file does not exist. T221812
        }
 
        return $this->title->getLocalURL();
    }
 
    public function getDescriptionText( Language $lang = null ) {
        if ( !$this->title ) {
            return false; // Avoid hard failure when the file does not exist. T221812
        }
 
        $store = MediaWikiServices::getInstance()->getRevisionStore();
        $revision = $store->getRevisionByTitle( $this->title, 0, RevisionStore::READ_NORMAL );
        if ( !$revision ) {
            return false;
        }
 
        $renderer = MediaWikiServices::getInstance()->getRevisionRenderer();
        $rendered = $renderer->getRenderedRevision(
            $revision,
            ParserOptions::newFromUserAndLang(
                RequestContext::getMain()->getUser(),
                $lang
            )
        );
 
        if ( !$rendered ) {
            // audience check failed
            return false;
        }
 
        $pout = $rendered->getRevisionParserOutput();
        return $pout->getText();
    }
 
    public function getUploader( int $audience = self::FOR_PUBLIC, Authority $performer = null ): ?UserIdentity {
        $this->load();
        if ( $audience === self::FOR_PUBLIC && $this->isDeleted( self::DELETED_USER ) ) {
            return null;
        } elseif ( $audience === self::FOR_THIS_USER && !$this->userCan( self::DELETED_USER, $performer ) ) {
            return null;
        } else {
            return $this->user;
        }
    }
 
    public function getDescription( $audience = self::FOR_PUBLIC, Authority $performer = null ) {
        $this->load();
        if ( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
            return '';
        } elseif ( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_COMMENT, $performer ) ) {
            return '';
        } else {
            return $this->description;
        }
    }
 
    public function getTimestamp() {
        $this->load();
 
        return $this->timestamp;
    }
 
    public function getDescriptionTouched() {
        if ( !$this->exists() ) {
            return false; // Avoid hard failure when the file does not exist. T221812
        }
 
        // The DB lookup might return false, e.g. if the file was just deleted, or the shared DB repo
        // itself gets it from elsewhere. To avoid repeating the DB lookups in such a case, we
        // need to differentiate between null (uninitialized) and false (failed to load).
        if ( $this->descriptionTouched === null ) {
            $cond = [
                'page_namespace' => $this->title->getNamespace(),
                'page_title' => $this->title->getDBkey()
            ];
            $touched = $this->repo->getReplicaDB()->selectField( 'page', 'page_touched', $cond, __METHOD__ );
            $this->descriptionTouched = $touched ? wfTimestamp( TS_MW, $touched ) : false;
        }
 
        return $this->descriptionTouched;
    }
 
    public function getSha1() {
        $this->load();
        // Initialise now if necessary
        if ( $this->sha1 == '' && $this->fileExists ) {
            $this->lock();
 
            $this->sha1 = $this->repo->getFileSha1( $this->getPath() );
            if ( !wfReadOnly() && strval( $this->sha1 ) != '' ) {
                $dbw = $this->repo->getPrimaryDB();
                $dbw->update( 'image',
                    [ 'img_sha1' => $this->sha1 ],
                    [ 'img_name' => $this->getName() ],
                    __METHOD__ );
                $this->invalidateCache();
            }
 
            $this->unlock();
        }
 
        return $this->sha1;
    }
 
    public function isCacheable() {
        $this->load();
 
        // If extra data (metadata) was not loaded then it must have been large
        return $this->extraDataLoaded
            && strlen( serialize( $this->metadataArray ) ) <= self::CACHE_FIELD_MAX_LEN;
    }
 
    public function acquireFileLock() {
        return Status::wrap( $this->getRepo()->getBackend()->lockFiles(
            [ $this->getPath() ], LockManager::LOCK_EX, 10
        ) );
    }
 
    public function releaseFileLock() {
        return Status::wrap( $this->getRepo()->getBackend()->unlockFiles(
            [ $this->getPath() ], LockManager::LOCK_EX
        ) );
    }
 
    public function lock() {
        if ( !$this->locked ) {
            $logger = LoggerFactory::getInstance( 'LocalFile' );
 
            $dbw = $this->repo->getPrimaryDB();
            $makesTransaction = !$dbw->trxLevel();
            $dbw->startAtomic( self::ATOMIC_SECTION_LOCK );
            // T56736: use simple lock to handle when the file does not exist.
            // SELECT FOR UPDATE prevents changes, not other SELECTs with FOR UPDATE.
            // Also, that would cause contention on INSERT of similarly named rows.
            $status = $this->acquireFileLock(); // represents all versions of the file
            if ( !$status->isGood() ) {
                $dbw->endAtomic( self::ATOMIC_SECTION_LOCK );
                $logger->warning( "Failed to lock '{file}'", [ 'file' => $this->name ] );
 
                throw new LocalFileLockError( $status );
            }
            // Release the lock *after* commit to avoid row-level contention.
            // Make sure it triggers on rollback() as well as commit() (T132921).
            $dbw->onTransactionResolution(
                function () use ( $logger ) {
                    $status = $this->releaseFileLock();
                    if ( !$status->isGood() ) {
                        $logger->error( "Failed to unlock '{file}'", [ 'file' => $this->name ] );
                    }
                },
                __METHOD__
            );
            // Callers might care if the SELECT snapshot is safely fresh
            $this->lockedOwnTrx = $makesTransaction;
        }
 
        $this->locked++;
 
        return $this->lockedOwnTrx;
    }
 
    public function unlock() {
        if ( $this->locked ) {
            --$this->locked;
            if ( !$this->locked ) {
                $dbw = $this->repo->getPrimaryDB();
                $dbw->endAtomic( self::ATOMIC_SECTION_LOCK );
                $this->lockedOwnTrx = false;
            }
        }
    }
 
    protected function readOnlyFatalStatus() {
        return $this->getRepo()->newFatal( 'filereadonlyerror', $this->getName(),
            $this->getRepo()->getName(), $this->getRepo()->getReadOnlyReason() );
    }
 
    public function __destruct() {
        $this->unlock();
    }
}