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         protected $mRepo;
  42
  43         public function __construct( $query, $moduleName ) {
  44                 parent::__construct( $query, $moduleName, 'ai' );
  45                 $this->mRepo = RepoGroup::singleton()->getLocalRepo();
  46         }
  47
  48         /**
  49          * Override parent method to make sure to make sure the repo's DB is used
  50          * which may not necesarilly be the same as the local DB.
  51          *
  52          * TODO: allow querying non-local repos.
  53          * @return DatabaseBase
  54          */
  55         protected function getDB() {
  56                 return $this->mRepo->getSlaveDB();
  57         }
  58
  59         public function execute() {
  60                 $this->run();
  61         }
  62
  63         public function getCacheMode( $params ) {
  64                 return 'public';
  65         }
  66
  67         /**
  68          * @param $resultPageSet ApiPageSet
  69          * @return void
  70          */
  71         public function executeGenerator( $resultPageSet ) {
  72                 if ( $resultPageSet->isResolvingRedirects() ) {
  73                         $this->dieUsage( 'Use "gaifilterredir=nonredirects" option instead of "redirects" when using allimages as a generator', 'params' );
  74                 }
  75
  76                 $this->run( $resultPageSet );
  77         }
  78
  79         /**
  80          * @param $resultPageSet ApiPageSet
  81          * @return void
  82          */
  83         private function run( $resultPageSet = null ) {
  84                 $repo = $this->mRepo;
  85                 if ( !$repo instanceof LocalRepo ) {
  86                         $this->dieUsage( 'Local file repository does not support querying all images', 'unsupportedrepo' );
  87                 }
  88
  89                 $db = $this->getDB();
  90
  91                 $params = $this->extractRequestParams();
  92
  93                 // Image filters
  94                 $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
  95                 $from = ( is_null( $params['from'] ) ? null : $this->titlePartToKey( $params['from'] ) );
  96                 $to = ( is_null( $params['to'] ) ? null : $this->titlePartToKey( $params['to'] ) );
  97                 $this->addWhereRange( 'img_name', $dir, $from, $to );
  98
  99                 if ( isset( $params['prefix'] ) )
 100                         $this->addWhere( 'img_name' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
 101
 102                 if ( isset( $params['minsize'] ) ) {
 103                         $this->addWhere( 'img_size>=' . intval( $params['minsize'] ) );
 104                 }
 105
 106                 if ( isset( $params['maxsize'] ) ) {
 107                         $this->addWhere( 'img_size<=' . intval( $params['maxsize'] ) );
 108                 }
 109
 110                 $sha1 = false;
 111                 if ( isset( $params['sha1'] ) ) {
 112                         $sha1 = wfBaseConvert( $params['sha1'], 16, 36, 31 );
 113                 } elseif ( isset( $params['sha1base36'] ) ) {
 114                         $sha1 = $params['sha1base36'];
 115                 }
 116                 if ( $sha1 ) {
 117                         $this->addWhere( 'img_sha1=' . $db->addQuotes( $sha1 ) );
 118                 }
 119
 120                 if ( !is_null( $params['mime'] ) ) {
 121                         global $wgMiserMode;
 122                         if ( $wgMiserMode  ) {
 123                                 $this->dieUsage( 'MIME search disabled in Miser Mode', 'mimeearchdisabled' );
 124                         }
 125
 126                         list( $major, $minor ) = File::splitMime( $params['mime'] );
 127
 128                         $this->addWhereFld( 'img_major_mime', $major );
 129                         $this->addWhereFld( 'img_minor_mime', $minor );
 130                 }
 131
 132                 $this->addTables( 'image' );
 133
 134                 $prop = array_flip( $params['prop'] );
 135                 $this->addFields( LocalFile::selectFields() );
 136
 137                 $limit = $params['limit'];
 138                 $this->addOption( 'LIMIT', $limit + 1 );
 139                 $this->addOption( 'ORDER BY', 'img_name' .
 140                                                 ( $params['dir'] == 'descending' ? ' DESC' : '' ) );
 141
 142                 $res = $this->select( __METHOD__ );
 143
 144                 $titles = array();
 145                 $count = 0;
 146                 $result = $this->getResult();
 147                 foreach ( $res as $row ) {
 148                         if ( ++ $count > $limit ) {
 149                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 150                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 151                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->img_name ) );
 152                                 break;
 153                         }
 154
 155                         if ( is_null( $resultPageSet ) ) {
 156                                 $file = $repo->newFileFromRow( $row );
 157                                 $info = array_merge( array( 'name' => $row->img_name ),
 158                                         ApiQueryImageInfo::getInfo( $file, $prop, $result ) );
 159                                 self::addTitleInfo( $info, $file->getTitle() );
 160
 161                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $info );
 162                                 if ( !$fit ) {
 163                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->img_name ) );
 164                                         break;
 165                                 }
 166                         } else {
 167                                 $titles[] = Title::makeTitle( NS_IMAGE, $row->img_name );
 168                         }
 169                 }
 170
 171                 if ( is_null( $resultPageSet ) ) {
 172                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'img' );
 173                 } else {
 174                         $resultPageSet->populateFromTitles( $titles );
 175                 }
 176         }
 177
 178         public function getAllowedParams() {
 179                 return array (
 180                         'from' => null,
 181                         'to' => null,
 182                         'prefix' => null,
 183                         'minsize' => array(
 184                                 ApiBase::PARAM_TYPE => 'integer',
 185                         ),
 186                         'maxsize' => array(
 187                                 ApiBase::PARAM_TYPE => 'integer',
 188                         ),
 189                         'limit' => array(
 190                                 ApiBase::PARAM_DFLT => 10,
 191                                 ApiBase::PARAM_TYPE => 'limit',
 192                                 ApiBase::PARAM_MIN => 1,
 193                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 194                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 195                         ),
 196                         'dir' => array(
 197                                 ApiBase::PARAM_DFLT => 'ascending',
 198                                 ApiBase::PARAM_TYPE => array(
 199                                         'ascending',
 200                                         'descending'
 201                                 )
 202                         ),
 203                         'sha1' => null,
 204                         'sha1base36' => null,
 205                         'prop' => array(
 206                                 ApiBase::PARAM_TYPE => ApiQueryImageInfo::getPropertyNames(),
 207                                 ApiBase::PARAM_DFLT => 'timestamp|url',
 208                                 ApiBase::PARAM_ISMULTI => true
 209                         ),
 210                         'mime' => null,
 211                 );
 212         }
 213
 214         public function getParamDescription() {
 215                 return array(
 216                         'from' => 'The image title to start enumerating from',
 217                         'to' => 'The image title to stop enumerating at',
 218                         'prefix' => 'Search for all image titles that begin with this value',
 219                         'dir' => 'The direction in which to list',
 220                         'minsize' => 'Limit to images with at least this many bytes',
 221                         'maxsize' => 'Limit to images with at most this many bytes',
 222                         'limit' => 'How many images in total to return',
 223                         'sha1' => "SHA1 hash of image. Overrides {$this->getModulePrefix()}sha1base36",
 224                         'sha1base36' => 'SHA1 hash of image in base 36 (used in MediaWiki)',
 225                         'prop' => ApiQueryImageInfo::getPropertyDescriptions(),
 226                         'mime' => 'What MIME type to search for. e.g. image/jpeg. Disabled in Miser Mode',
 227                 );
 228         }
 229
 230         public function getDescription() {
 231                 return 'Enumerate all images sequentially';
 232         }
 233
 234         public function getPossibleErrors() {
 235                 return array_merge( parent::getPossibleErrors(), array(
 236                         array( 'code' => 'params', 'info' => 'Use "gaifilterredir=nonredirects" option instead of "redirects" when using allimages as a generator' ),
 237                         array( 'code' => 'unsupportedrepo', 'info' => 'Local file repository does not support querying all images' ),
 238                         array( 'code' => 'mimeearchdisabled', 'info' => 'MIME search disabled in Miser Mode' ),
 239                 ) );
 240         }
 241
 242         protected function getExamples() {
 243                 return array(
 244                         'Simple Use',
 245                         ' Show a list of images starting at the letter "B"',
 246                         '  api.php?action=query&list=allimages&aifrom=B',
 247                         'Using as Generator',
 248                         ' Show info about 4 images starting at the letter "T"',
 249                         '  api.php?action=query&generator=allimages&gailimit=4&gaifrom=T&prop=imageinfo',
 250                 );
 251         }
 252
 253         public function getVersion() {
 254                 return __CLASS__ . ': $Id$';
 255         }
 256 }