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[mediawiki.git] / includes / api / ApiQueryFilearchive.php

<?php
/**
 * API for MediaWiki 1.12+
 *
 * Created on May 10, 2010
 *
 * Copyright © 2010 Sam Reed
 * Copyright © 2008 Vasiliev Victor vasilvv@gmail.com,
 * based on ApiQueryAllPages.php
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

/**
 * Query module to enumerate all deleted files.
 *
 * @ingroup API
 */
class ApiQueryFilearchive extends ApiQueryBase {

        public function __construct( $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( array( 'fa_name', 'fa_deleted' ) );
                $this->addFieldsIf( 'fa_storage_key', $fld_sha1 );
                $this->addFieldsIf( 'fa_timestamp', $fld_timestamp );
                $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'] );
                        if ( count( $cont ) != 1 ) {
                                $this->dieUsage( "Invalid continue param. You should pass the " .
                                        "original value returned by the previous query", "_badcontinue" );
                        }
                        $op = $params['dir'] == 'descending' ? '<' : '>';
                        $cont_from = $db->addQuotes( $cont[0] );
                        $this->addWhere( "fa_name $op= $cont_from" );
                }

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

                $sha1Set = isset( $params['sha1'] );
                $sha1base36Set = isset( $params['sha1base36'] );
                if ( $sha1Set || $sha1base36Set ) {
                        global $wgMiserMode;
                        if ( $wgMiserMode  ) {
                                $this->dieUsage( 'Search by hash disabled in Miser Mode', 'hashsearchdisabled' );
                        }

                        $sha1 = false;
                        if ( $sha1Set ) {
                                if ( !$this->validateSha1Hash( $params['sha1'] ) ) {
                                        $this->dieUsage( 'The SHA1 hash provided is not valid', 'invalidsha1hash' );
                                }
                                $sha1 = wfBaseConvert( $params['sha1'], 16, 36, 31 );
                        } elseif ( $sha1base36Set ) {
                                if ( !$this->validateSha1Base36Hash( $params['sha1base36'] ) ) {
                                        $this->dieUsage( 'The SHA1Base36 hash provided is not valid', 'invalidsha1base36hash' );
                                }
                                $sha1 = $params['sha1base36'];
                        }
                        if ( $sha1 ) {
                                $this->addWhere( 'fa_storage_key ' . $db->buildLike( "{$sha1}.", $db->anyString() ) );
                        }
                }

                if ( !$user->isAllowed( 'suppressrevision' ) ) {
                        // Filter out revisions that the user is not allowed to see. There
                        // is no way to indicate that we have skipped stuff because the
                        // continuation parameter is fa_name

                        // Note that this field is unindexed. This should however not be
                        // a big problem as files with fa_deleted are rare
                        $this->addWhereFld( 'fa_deleted', 0 );
                }

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

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

                        if ( $fld_sha1 ) {
                                $file['sha1'] = wfBaseConvert( LocalRepo::getHashFromKey( $row->fa_storage_key ), 36, 16, 40 );
                        }
                        if ( $fld_timestamp ) {
                                $file['timestamp'] = wfTimestamp( TS_ISO_8601, $row->fa_timestamp );
                        }
                        if ( $fld_user ) {
                                $file['userid'] = $row->fa_user;
                                $file['user'] = $row->fa_user_text;
                        }
                        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_description ) {
                                $file['description'] = $row->fa_description;
                                if ( isset( $prop['parseddescription'] ) ) {
                                        $file['parseddescription'] = Linker::formatComment(
                                                $row->fa_description, $title );
                                }
                        }
                        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 );
                                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. Disabled in Miser Mode",
                        'sha1base36' => 'SHA1 hash of image in base 36 (used in MediaWiki). Disabled in Miser Mode',
                        '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 getResultProperties() {
                return array(
                        '' => array(
                                'name' => 'string',
                                'ns' => 'namespace',
                                'title' => 'string',
                                'filehidden' => 'boolean',
                                'commenthidden' => 'boolean',
                                'userhidden' => 'boolean',
                                'suppressed' => 'boolean'
                        ),
                        'sha1' => array(
                                'sha1' => 'string'
                        ),
                        'timestamp' => array(
                                'timestamp' => 'timestamp'
                        ),
                        'user' => array(
                                'userid' => 'integer',
                                'user' => 'string'
                        ),
                        'size' => array(
                                'size' => 'integer',
                                'pagecount' => array(
                                        ApiBase::PROP_TYPE => 'integer',
                                        ApiBase::PROP_NULLABLE => true
                                ),
                                'height' => 'integer',
                                'width' => 'integer'
                        ),
                        'dimensions' => array(
                                'size' => 'integer',
                                'pagecount' => array(
                                        ApiBase::PROP_TYPE => 'integer',
                                        ApiBase::PROP_NULLABLE => true
                                ),
                                'height' => 'integer',
                                'width' => 'integer'
                        ),
                        'description' => array(
                                'description' => 'string'
                        ),
                        'parseddescription' => array(
                                'description' => 'string',
                                'parseddescription' => 'string'
                        ),
                        'metadata' => array(
                                'metadata' => 'string'
                        ),
                        'bitdepth' => array(
                                'bitdepth' => 'integer'
                        ),
                        'mime' => array(
                                'mime' => 'string'
                        ),
                        'mediatype' => array(
                                'mediatype' => 'string'
                        ),
                        'archivename' => array(
                                'archivename' => 'string'
                        ),
                );
        }

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

        public function getPossibleErrors() {
                return array_merge( parent::getPossibleErrors(), array(
                        array( 'code' => 'permissiondenied', 'info' => 'You don\'t have permission to view deleted file information' ),
                        array( 'code' => 'hashsearchdisabled', 'info' => 'Search by hash disabled in Miser Mode' ),
                        array( 'code' => 'invalidsha1hash', 'info' => 'The SHA1 hash provided is not valid' ),
                        array( 'code' => 'invalidsha1base36hash', 'info' => 'The SHA1Base36 hash provided is not valid' ),
                        array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
                ) );
        }

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

        public function getVersion() {
                return __CLASS__ . ': $Id$';
        }
}