includes/api/ApiQueryAllimages.php

   1 <?php
   2
   3 /**
   4  * API for MediaWiki 1.12+
   5  *
   6  * Created on Mar 16, 2008
   7  *
   8  * Copyright © 2008 Vasiliev Victor vasilvv@gmail.com,
   9  * based on ApiQueryAllpages.php
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  24  * http://www.gnu.org/copyleft/gpl.html
  25  *
  26  * @file
  27  */
  28
  29 if ( !defined( 'MEDIAWIKI' ) ) {
  30         // Eclipse helper - will be ignored in production
  31         require_once( 'ApiQueryBase.php' );
  32 }
  33
  34 /**
  35  * Query module to enumerate all available pages.
  36  *
  37  * @ingroup API
  38  */
  39 class ApiQueryAllimages extends ApiQueryGeneratorBase {
  40
  41         public function __construct( $query, $moduleName ) {
  42                 parent::__construct( $query, $moduleName, 'ai' );
  43                 $this->mRepo = RepoGroup::singleton()->getLocalRepo();
  44         }
  45
  46         /**
  47          * Overide parent method to make sure to make sure the repo's DB is used
  48          * which may not necesarilly be the same as the local DB.
  49          *
  50          * TODO: allow querying non-local repos.
  51          */
  52         protected function getDB() {
  53                 return $this->mRepo->getSlaveDB();
  54         }
  55
  56         public function execute() {
  57                 $this->run();
  58         }
  59
  60         public function getCacheMode( $params ) {
  61                 return 'public';
  62         }
  63
  64         public function executeGenerator( $resultPageSet ) {
  65                 if ( $resultPageSet->isResolvingRedirects() ) {
  66                         $this->dieUsage( 'Use "gaifilterredir=nonredirects" option instead of "redirects" when using allimages as a generator', 'params' );
  67                 }
  68
  69                 $this->run( $resultPageSet );
  70         }
  71
  72         private function run( $resultPageSet = null ) {
  73                 $repo = $this->mRepo;
  74                 if ( !$repo instanceof LocalRepo ) {
  75                         $this->dieUsage( 'Local file repository does not support querying all images', 'unsupportedrepo' );
  76                 }
  77
  78                 $db = $this->getDB();
  79
  80                 $params = $this->extractRequestParams();
  81
  82                 // Image filters
  83                 $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
  84                 $from = ( is_null( $params['from'] ) ? null : $this->titlePartToKey( $params['from'] ) );
  85                 $to = ( is_null( $params['to'] ) ? null : $this->titlePartToKey( $params['to'] ) );
  86                 $this->addWhereRange( 'img_name', $dir, $from, $to );
  87
  88                 if ( isset( $params['prefix'] ) )
  89                         $this->addWhere( 'img_name' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
  90
  91                 if ( isset( $params['minsize'] ) ) {
  92                         $this->addWhere( 'img_size>=' . intval( $params['minsize'] ) );
  93                 }
  94
  95                 if ( isset( $params['maxsize'] ) ) {
  96                         $this->addWhere( 'img_size<=' . intval( $params['maxsize'] ) );
  97                 }
  98
  99                 $sha1 = false;
 100                 if ( isset( $params['sha1'] ) ) {
 101                         $sha1 = wfBaseConvert( $params['sha1'], 16, 36, 31 );
 102                 } elseif ( isset( $params['sha1base36'] ) ) {
 103                         $sha1 = $params['sha1base36'];
 104                 }
 105                 if ( $sha1 ) {
 106                         $this->addWhere( 'img_sha1=' . $db->addQuotes( $sha1 ) );
 107                 }
 108
 109                 $this->addTables( 'image' );
 110
 111                 $prop = array_flip( $params['prop'] );
 112                 $this->addFields( LocalFile::selectFields() );
 113
 114                 $limit = $params['limit'];
 115                 $this->addOption( 'LIMIT', $limit + 1 );
 116                 $this->addOption( 'ORDER BY', 'img_name' .
 117                                                 ( $params['dir'] == 'descending' ? ' DESC' : '' ) );
 118
 119                 $res = $this->select( __METHOD__ );
 120
 121                 $titles = array();
 122                 $count = 0;
 123                 $result = $this->getResult();
 124                 foreach ( $res as $row ) {
 125                         if ( ++ $count > $limit ) {
 126                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 127                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 128                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->img_name ) );
 129                                 break;
 130                         }
 131
 132                         if ( is_null( $resultPageSet ) ) {
 133                                 $file = $repo->newFileFromRow( $row );
 134                                 $info = array_merge( array( 'name' => $row->img_name ),
 135                                         ApiQueryImageInfo::getInfo( $file, $prop, $result ) );
 136                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $info );
 137                                 if ( !$fit ) {
 138                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->img_name ) );
 139                                         break;
 140                                 }
 141                         } else {
 142                                 $titles[] = Title::makeTitle( NS_IMAGE, $row->img_name );
 143                         }
 144                 }
 145
 146                 if ( is_null( $resultPageSet ) ) {
 147                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'img' );
 148                 } else {
 149                         $resultPageSet->populateFromTitles( $titles );
 150                 }
 151         }
 152
 153         public function getAllowedParams() {
 154                 return array (
 155                         'from' => null,
 156                         'to' => null,
 157                         'prefix' => null,
 158                         'minsize' => array(
 159                                 ApiBase::PARAM_TYPE => 'integer',
 160                         ),
 161                         'maxsize' => array(
 162                                 ApiBase::PARAM_TYPE => 'integer',
 163                         ),
 164                         'limit' => array(
 165                                 ApiBase::PARAM_DFLT => 10,
 166                                 ApiBase::PARAM_TYPE => 'limit',
 167                                 ApiBase::PARAM_MIN => 1,
 168                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 169                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 170                         ),
 171                         'dir' => array(
 172                                 ApiBase::PARAM_DFLT => 'ascending',
 173                                 ApiBase::PARAM_TYPE => array(
 174                                         'ascending',
 175                                         'descending'
 176                                 )
 177                         ),
 178                         'sha1' => null,
 179                         'sha1base36' => null,
 180                         'prop' => array(
 181                                 ApiBase::PARAM_TYPE => ApiQueryImageInfo::getPropertyNames(),
 182                                 ApiBase::PARAM_DFLT => 'timestamp|url',
 183                                 ApiBase::PARAM_ISMULTI => true
 184                         )
 185                 );
 186         }
 187
 188         public function getParamDescription() {
 189                 return array(
 190                         'from' => 'The image title to start enumerating from',
 191                         'to' => 'The image title to stop enumerating at',
 192                         'prefix' => 'Search for all image titles that begin with this value',
 193                         'dir' => 'The direction in which to list',
 194                         'minsize' => 'Limit to images with at least this many bytes',
 195                         'maxsize' => 'Limit to images with at most this many bytes',
 196                         'limit' => 'How many images in total to return',
 197                         'sha1' => "SHA1 hash of image. Overrides {$this->getModulePrefix()}sha1base36",
 198                         'sha1base36' => 'SHA1 hash of image in base 36 (used in MediaWiki)',
 199                         'prop' => array(
 200                                 'Which properties to get',
 201                                 ' timestamp    - Adds the timestamp when the image was upload',
 202                                 ' user         - Adds the username of the last uploader',
 203                                 ' userid       - Adds the user id of the last uploader',
 204                                 ' comment      - Adds the comment of the last upload',
 205                                 ' url          - Adds the URL of the image and its description page',
 206                                 ' size         - Adds the size of the image in bytes and its height and width',
 207                                 ' dimensions   - Alias of size',
 208                                 ' sha1         - Adds the sha1 of the image',
 209                                 ' mime         - Adds the MIME of the image',
 210                                 ' thumbmime    - Adds the MIME of the tumbnail for the image',
 211                                 ' archivename  - Adds the file name of the archive version for non-latest versions',
 212                                 ' bitdepth     - Adds the bit depth of the version',
 213                         ),
 214                 );
 215         }
 216
 217         public function getDescription() {
 218                 return 'Enumerate all images sequentially';
 219         }
 220
 221         public function getPossibleErrors() {
 222                 return array_merge( parent::getPossibleErrors(), array(
 223                         array( 'code' => 'params', 'info' => 'Use "gaifilterredir=nonredirects" option instead of "redirects" when using allimages as a generator' ),
 224                         array( 'code' => 'unsupportedrepo', 'info' => 'Local file repository does not support querying all images' ),
 225                 ) );
 226         }
 227
 228         protected function getExamples() {
 229                 return array(
 230                         'Simple Use',
 231                         ' Show a list of images starting at the letter "B"',
 232                         '  api.php?action=query&list=allimages&aifrom=B',
 233                         'Using as Generator',
 234                         ' Show info about 4 images starting at the letter "T"',
 235                         '  api.php?action=query&generator=allimages&gailimit=4&gaifrom=T&prop=imageinfo',
 236                 );
 237         }
 238
 239         public function getVersion() {
 240                 return __CLASS__ . ': $Id$';
 241         }
 242 }