ArchivedFile.php

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<?php
class ArchivedFile {
    private $id;

    private $name;

    private $group;

    private $key;

    private $size;

    private $bits;

    private $width;

    private $height;

    private $metadata;

    private $mime;

    private $media_type;

    private $description;

    private $user;

    private $user_text;

    private $timestamp;

    private $dataLoaded;

    private $deleted;

    private $sha1;

    private $pageCount;

    private $archive_name;

    protected $handler;

    protected $title; # image title

    function __construct( $title, $id = 0, $key = '', $sha1 = '' ) {
        $this->id = -1;
        $this->title = false;
        $this->name = false;
        $this->group = 'deleted'; // needed for direct use of constructor
        $this->key = '';
        $this->size = 0;
        $this->bits = 0;
        $this->width = 0;
        $this->height = 0;
        $this->metadata = '';
        $this->mime = "unknown/unknown";
        $this->media_type = '';
        $this->description = '';
        $this->user = 0;
        $this->user_text = '';
        $this->timestamp = null;
        $this->deleted = 0;
        $this->dataLoaded = false;
        $this->exists = false;
        $this->sha1 = '';

        if ( $title instanceof Title ) {
            $this->title = File::normalizeTitle( $title, 'exception' );
            $this->name = $title->getDBkey();
        }

        if ( $id ) {
            $this->id = $id;
        }

        if ( $key ) {
            $this->key = $key;
        }

        if ( $sha1 ) {
            $this->sha1 = $sha1;
        }

        if ( !$id && !$key && !( $title instanceof Title ) && !$sha1 ) {
            throw new MWException( "No specifications provided to ArchivedFile constructor." );
        }
    }

    public function load() {
        if ( $this->dataLoaded ) {
            return true;
        }
        $conds = [];

        if ( $this->id > 0 ) {
            $conds['fa_id'] = $this->id;
        }
        if ( $this->key ) {
            $conds['fa_storage_group'] = $this->group;
            $conds['fa_storage_key'] = $this->key;
        }
        if ( $this->title ) {
            $conds['fa_name'] = $this->title->getDBkey();
        }
        if ( $this->sha1 ) {
            $conds['fa_sha1'] = $this->sha1;
        }

        if ( !count( $conds ) ) {
            throw new MWException( "No specific information for retrieving archived file" );
        }

        if ( !$this->title || $this->title->getNamespace() == NS_FILE ) {
            $this->dataLoaded = true; // set it here, to have also true on miss
            $dbr = wfGetDB( DB_SLAVE );
            $row = $dbr->selectRow(
                'filearchive',
                self::selectFields(),
                $conds,
                __METHOD__,
                [ 'ORDER BY' => 'fa_timestamp DESC' ]
            );
            if ( !$row ) {
                // this revision does not exist?
                return null;
            }

            // initialize fields for filestore image object
            $this->loadFromRow( $row );
        } else {
            throw new MWException( 'This title does not correspond to an image page.' );
        }
        $this->exists = true;

        return true;
    }

    public static function newFromRow( $row ) {
        $file = new ArchivedFile( Title::makeTitle( NS_FILE, $row->fa_name ) );
        $file->loadFromRow( $row );

        return $file;
    }

    static function selectFields() {
        return [
            'fa_id',
            'fa_name',
            'fa_archive_name',
            'fa_storage_key',
            'fa_storage_group',
            'fa_size',
            'fa_bits',
            'fa_width',
            'fa_height',
            'fa_metadata',
            'fa_media_type',
            'fa_major_mime',
            'fa_minor_mime',
            'fa_description',
            'fa_user',
            'fa_user_text',
            'fa_timestamp',
            'fa_deleted',
            'fa_deleted_timestamp', /* Used by LocalFileRestoreBatch */
            'fa_sha1',
        ];
    }

    public function loadFromRow( $row ) {
        $this->id = intval( $row->fa_id );
        $this->name = $row->fa_name;
        $this->archive_name = $row->fa_archive_name;
        $this->group = $row->fa_storage_group;
        $this->key = $row->fa_storage_key;
        $this->size = $row->fa_size;
        $this->bits = $row->fa_bits;
        $this->width = $row->fa_width;
        $this->height = $row->fa_height;
        $this->metadata = $row->fa_metadata;
        $this->mime = "$row->fa_major_mime/$row->fa_minor_mime";
        $this->media_type = $row->fa_media_type;
        $this->description = $row->fa_description;
        $this->user = $row->fa_user;
        $this->user_text = $row->fa_user_text;
        $this->timestamp = $row->fa_timestamp;
        $this->deleted = $row->fa_deleted;
        if ( isset( $row->fa_sha1 ) ) {
            $this->sha1 = $row->fa_sha1;
        } else {
            // old row, populate from key
            $this->sha1 = LocalRepo::getHashFromKey( $this->key );
        }
        if ( !$this->title ) {
            $this->title = Title::makeTitleSafe( NS_FILE, $row->fa_name );
        }
    }

    public function getTitle() {
        if ( !$this->title ) {
            $this->load();
        }
        return $this->title;
    }

    public function getName() {
        if ( $this->name === false ) {
            $this->load();
        }

        return $this->name;
    }

    public function getID() {
        $this->load();

        return $this->id;
    }

    public function exists() {
        $this->load();

        return $this->exists;
    }

    public function getKey() {
        $this->load();

        return $this->key;
    }

    public function getStorageKey() {
        return $this->getKey();
    }

    public function getGroup() {
        return $this->group;
    }

    public function getWidth() {
        $this->load();

        return $this->width;
    }

    public function getHeight() {
        $this->load();

        return $this->height;
    }

    public function getMetadata() {
        $this->load();

        return $this->metadata;
    }

    public function getSize() {
        $this->load();

        return $this->size;
    }

    public function getBits() {
        $this->load();

        return $this->bits;
    }

    public function getMimeType() {
        $this->load();

        return $this->mime;
    }

    function getHandler() {
        if ( !isset( $this->handler ) ) {
            $this->handler = MediaHandler::getHandler( $this->getMimeType() );
        }

        return $this->handler;
    }

    function pageCount() {
        if ( !isset( $this->pageCount ) ) {
            if ( $this->getHandler() && $this->handler->isMultiPage( $this ) ) {
                $this->pageCount = $this->handler->pageCount( $this );
            } else {
                $this->pageCount = false;
            }
        }

        return $this->pageCount;
    }

    public function getMediaType() {
        $this->load();

        return $this->media_type;
    }

    public function getTimestamp() {
        $this->load();

        return wfTimestamp( TS_MW, $this->timestamp );
    }

    function getSha1() {
        $this->load();

        return $this->sha1;
    }

    public function getUser( $type = 'text' ) {
        $this->load();

        if ( $type == 'text' ) {
            return $this->user_text;
        } elseif ( $type == 'id' ) {
            return (int)$this->user;
        }

        throw new MWException( "Unknown type '$type'." );
    }

    public function getUserText() {
        wfDeprecated( __METHOD__, '1.23' );
        $this->load();
        if ( $this->isDeleted( File::DELETED_USER ) ) {
            return 0;
        } else {
            return $this->user_text;
        }
    }

    public function getDescription() {
        $this->load();
        if ( $this->isDeleted( File::DELETED_COMMENT ) ) {
            return 0;
        } else {
            return $this->description;
        }
    }

    public function getRawUser() {
        $this->load();

        return $this->user;
    }

    public function getRawUserText() {
        $this->load();

        return $this->user_text;
    }

    public function getRawDescription() {
        $this->load();

        return $this->description;
    }

    public function getVisibility() {
        $this->load();

        return $this->deleted;
    }

    public function isDeleted( $field ) {
        $this->load();

        return ( $this->deleted & $field ) == $field;
    }

    public function userCan( $field, User $user = null ) {
        $this->load();

        $title = $this->getTitle();
        return Revision::userCanBitfield( $this->deleted, $field, $user, $title ?: null );
    }
}