ApiQueryFilearchive.php

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<?php
class ApiQueryFilearchive extends ApiQueryBase {

    public function __construct( ApiQuery $query, $moduleName ) {
        parent::__construct( $query, $moduleName, 'fa' );
    }

    public function execute() {
        $user = $this->getUser();
        // Before doing anything at all, let's check permissions
        if ( !$user->isAllowed( 'deletedhistory' ) ) {
            $this->dieUsage(
                'You don\'t have permission to view deleted file information',
                'permissiondenied'
            );
        }

        $db = $this->getDB();

        $params = $this->extractRequestParams();

        $prop = array_flip( $params['prop'] );
        $fld_sha1 = isset( $prop['sha1'] );
        $fld_timestamp = isset( $prop['timestamp'] );
        $fld_user = isset( $prop['user'] );
        $fld_size = isset( $prop['size'] );
        $fld_dimensions = isset( $prop['dimensions'] );
        $fld_description = isset( $prop['description'] ) || isset( $prop['parseddescription'] );
        $fld_mime = isset( $prop['mime'] );
        $fld_mediatype = isset( $prop['mediatype'] );
        $fld_metadata = isset( $prop['metadata'] );
        $fld_bitdepth = isset( $prop['bitdepth'] );
        $fld_archivename = isset( $prop['archivename'] );

        $this->addTables( 'filearchive' );

        $this->addFields( ArchivedFile::selectFields() );
        $this->addFields( array( 'fa_id', 'fa_name', 'fa_timestamp', 'fa_deleted' ) );
        $this->addFieldsIf( 'fa_sha1', $fld_sha1 );
        $this->addFieldsIf( array( 'fa_user', 'fa_user_text' ), $fld_user );
        $this->addFieldsIf( array( 'fa_height', 'fa_width', 'fa_size' ), $fld_dimensions || $fld_size );
        $this->addFieldsIf( 'fa_description', $fld_description );
        $this->addFieldsIf( array( 'fa_major_mime', 'fa_minor_mime' ), $fld_mime );
        $this->addFieldsIf( 'fa_media_type', $fld_mediatype );
        $this->addFieldsIf( 'fa_metadata', $fld_metadata );
        $this->addFieldsIf( 'fa_bits', $fld_bitdepth );
        $this->addFieldsIf( 'fa_archive_name', $fld_archivename );

        if ( !is_null( $params['continue'] ) ) {
            $cont = explode( '|', $params['continue'] );
            $this->dieContinueUsageIf( count( $cont ) != 3 );
            $op = $params['dir'] == 'descending' ? '<' : '>';
            $cont_from = $db->addQuotes( $cont[0] );
            $cont_timestamp = $db->addQuotes( $db->timestamp( $cont[1] ) );
            $cont_id = (int)$cont[2];
            $this->dieContinueUsageIf( $cont[2] !== (string)$cont_id );
            $this->addWhere( "fa_name $op $cont_from OR " .
                "(fa_name = $cont_from AND " .
                "(fa_timestamp $op $cont_timestamp OR " .
                "(fa_timestamp = $cont_timestamp AND " .
                "fa_id $op= $cont_id )))"
            );
        }

        // Image filters
        $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
        $from = ( $params['from'] === null ? null : $this->titlePartToKey( $params['from'], NS_FILE ) );
        $to = ( $params['to'] === null ? null : $this->titlePartToKey( $params['to'], NS_FILE ) );
        $this->addWhereRange( 'fa_name', $dir, $from, $to );
        if ( isset( $params['prefix'] ) ) {
            $this->addWhere( 'fa_name' . $db->buildLike(
                $this->titlePartToKey( $params['prefix'], NS_FILE ),
                $db->anyString() ) );
        }

        $sha1Set = isset( $params['sha1'] );
        $sha1base36Set = isset( $params['sha1base36'] );
        if ( $sha1Set || $sha1base36Set ) {
            $sha1 = false;
            if ( $sha1Set ) {
                $sha1 = strtolower( $params['sha1'] );
                if ( !$this->validateSha1Hash( $sha1 ) ) {
                    $this->dieUsage( 'The SHA1 hash provided is not valid', 'invalidsha1hash' );
                }
                $sha1 = wfBaseConvert( $sha1, 16, 36, 31 );
            } elseif ( $sha1base36Set ) {
                $sha1 = strtolower( $params['sha1base36'] );
                if ( !$this->validateSha1Base36Hash( $sha1 ) ) {
                    $this->dieUsage( 'The SHA1Base36 hash provided is not valid', 'invalidsha1base36hash' );
                }
            }
            if ( $sha1 ) {
                $this->addWhereFld( 'fa_sha1', $sha1 );
            }
        }

        // Exclude files this user can't view.
        if ( !$user->isAllowed( 'deletedtext' ) ) {
            $bitmask = File::DELETED_FILE;
        } elseif ( !$user->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
            $bitmask = File::DELETED_FILE | File::DELETED_RESTRICTED;
        } else {
            $bitmask = 0;
        }
        if ( $bitmask ) {
            $this->addWhere( $this->getDB()->bitAnd( 'fa_deleted', $bitmask ) . " != $bitmask" );
        }

        $limit = $params['limit'];
        $this->addOption( 'LIMIT', $limit + 1 );
        $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
        $this->addOption( 'ORDER BY', array(
            'fa_name' . $sort,
            'fa_timestamp' . $sort,
            'fa_id' . $sort,
        ) );

        $res = $this->select( __METHOD__ );

        $count = 0;
        $result = $this->getResult();
        foreach ( $res as $row ) {
            if ( ++$count > $limit ) {
                // We've reached the one extra which shows that there are
                // additional pages to be had. Stop here...
                $this->setContinueEnumParameter(
                    'continue', "$row->fa_name|$row->fa_timestamp|$row->fa_id"
                );
                break;
            }

            $file = array();
            $file['id'] = $row->fa_id;
            $file['name'] = $row->fa_name;
            $title = Title::makeTitle( NS_FILE, $row->fa_name );
            self::addTitleInfo( $file, $title );

            if ( $fld_description &&
                Revision::userCanBitfield( $row->fa_deleted, File::DELETED_COMMENT, $user )
            ) {
                $file['description'] = $row->fa_description;
                if ( isset( $prop['parseddescription'] ) ) {
                    $file['parseddescription'] = Linker::formatComment(
                        $row->fa_description, $title );
                }
            }
            if ( $fld_user &&
                Revision::userCanBitfield( $row->fa_deleted, File::DELETED_USER, $user )
            ) {
                $file['userid'] = $row->fa_user;
                $file['user'] = $row->fa_user_text;
            }
            if ( $fld_sha1 ) {
                $file['sha1'] = wfBaseConvert( $row->fa_sha1, 36, 16, 40 );
            }
            if ( $fld_timestamp ) {
                $file['timestamp'] = wfTimestamp( TS_ISO_8601, $row->fa_timestamp );
            }
            if ( $fld_size || $fld_dimensions ) {
                $file['size'] = $row->fa_size;

                $pageCount = ArchivedFile::newFromRow( $row )->pageCount();
                if ( $pageCount !== false ) {
                    $vals['pagecount'] = $pageCount;
                }

                $file['height'] = $row->fa_height;
                $file['width'] = $row->fa_width;
            }
            if ( $fld_mediatype ) {
                $file['mediatype'] = $row->fa_media_type;
            }
            if ( $fld_metadata ) {
                $file['metadata'] = $row->fa_metadata
                    ? ApiQueryImageInfo::processMetaData( unserialize( $row->fa_metadata ), $result )
                    : null;
            }
            if ( $fld_bitdepth ) {
                $file['bitdepth'] = $row->fa_bits;
            }
            if ( $fld_mime ) {
                $file['mime'] = "$row->fa_major_mime/$row->fa_minor_mime";
            }
            if ( $fld_archivename && !is_null( $row->fa_archive_name ) ) {
                $file['archivename'] = $row->fa_archive_name;
            }

            if ( $row->fa_deleted & File::DELETED_FILE ) {
                $file['filehidden'] = '';
            }
            if ( $row->fa_deleted & File::DELETED_COMMENT ) {
                $file['commenthidden'] = '';
            }
            if ( $row->fa_deleted & File::DELETED_USER ) {
                $file['userhidden'] = '';
            }
            if ( $row->fa_deleted & File::DELETED_RESTRICTED ) {
                // This file is deleted for normal admins
                $file['suppressed'] = '';
            }

            $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $file );
            if ( !$fit ) {
                $this->setContinueEnumParameter(
                    'continue', "$row->fa_name|$row->fa_timestamp|$row->fa_id"
                );
                break;
            }
        }

        $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'fa' );
    }

    public function getAllowedParams() {
        return array(
            'from' => null,
            'continue' => null,
            'to' => null,
            'prefix' => null,
            'limit' => array(
                ApiBase::PARAM_DFLT => 10,
                ApiBase::PARAM_TYPE => 'limit',
                ApiBase::PARAM_MIN => 1,
                ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
                ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
            ),
            'dir' => array(
                ApiBase::PARAM_DFLT => 'ascending',
                ApiBase::PARAM_TYPE => array(
                    'ascending',
                    'descending'
                )
            ),
            'sha1' => null,
            'sha1base36' => null,
            'prop' => array(
                ApiBase::PARAM_DFLT => 'timestamp',
                ApiBase::PARAM_ISMULTI => true,
                ApiBase::PARAM_TYPE => array(
                    'sha1',
                    'timestamp',
                    'user',
                    'size',
                    'dimensions',
                    'description',
                    'parseddescription',
                    'mime',
                    'mediatype',
                    'metadata',
                    'bitdepth',
                    'archivename',
                ),
            ),
        );
    }

    public function getParamDescription() {
        return array(
            'from' => 'The image title to start enumerating from',
            'continue' => 'When more results are available, use this to continue',
            'to' => 'The image title to stop enumerating at',
            'prefix' => 'Search for all image titles that begin with this value',
            'dir' => 'The direction in which to list',
            'limit' => 'How many images to return in total',
            'sha1' => "SHA1 hash of image. Overrides {$this->getModulePrefix()}sha1base36",
            'sha1base36' => 'SHA1 hash of image in base 36 (used in MediaWiki)',
            'prop' => array(
                'What image information to get:',
                ' sha1              - Adds SHA-1 hash for the image',
                ' timestamp         - Adds timestamp for the uploaded version',
                ' user              - Adds user who uploaded the image version',
                ' size              - Adds the size of the image in bytes and the height, ' .
                    'width and page count (if applicable)',
                ' dimensions        - Alias for size',
                ' description       - Adds description the image version',
                ' parseddescription - Parse the description on the version',
                ' mime              - Adds MIME of the image',
                ' mediatype         - Adds the media type of the image',
                ' metadata          - Lists Exif metadata for the version of the image',
                ' bitdepth          - Adds the bit depth of the version',
                ' archivename       - Adds the file name of the archive version for non-latest versions'
            ),
        );
    }

    public function getDescription() {
        return 'Enumerate all deleted files sequentially.';
    }

    public function getExamples() {
        return array(
            'api.php?action=query&list=filearchive' => array(
                'Simple Use',
                'Show a list of all deleted files',
            ),
        );
    }

    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/API:Filearchive';
    }
}