includes/api/ApiQueryAllimages.php

   1 <?php
   2
   3 /*
   4  * Created on Mar 16, 2008
   5  *
   6  * API for MediaWiki 1.12+
   7  *
   8  * Copyright (C) 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  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  * http://www.gnu.org/copyleft/gpl.html
  25  */
  26
  27 if (!defined('MEDIAWIKI')) {
  28         // Eclipse helper - will be ignored in production
  29         require_once ('ApiQueryBase.php');
  30 }
  31
  32 /**
  33  * Query module to enumerate all available pages.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryAllimages extends ApiQueryGeneratorBase {
  38
  39         public function __construct($query, $moduleName) {
  40                 parent :: __construct($query, $moduleName, 'ai');
  41         }
  42
  43         public function execute() {
  44                 $this->run();
  45         }
  46
  47         public function executeGenerator($resultPageSet) {
  48                 if ($resultPageSet->isResolvingRedirects())
  49                         $this->dieUsage('Use "gaifilterredir=nonredirects" option instead of "redirects" when using allimages as a generator', 'params');
  50
  51                 $this->run($resultPageSet);
  52         }
  53
  54         private function run($resultPageSet = null) {
  55                 $repo = RepoGroup::singleton()->getLocalRepo();
  56                 if ( !$repo instanceof LocalRepo )
  57                         $this->dieUsage('Local file repository does not support querying all images', 'unsupportedrepo');
  58
  59                 $db = $this->getDB();
  60
  61                 $params = $this->extractRequestParams();
  62
  63                 // Image filters
  64                 $dir = ($params['dir'] == 'descending' ? 'older' : 'newer');
  65                 $from = (is_null($params['from']) ? null : $this->titlePartToKey($params['from']));
  66                 $this->addWhereRange('img_name', $dir, $from, null);
  67                 if (isset ($params['prefix']))
  68                         $this->addWhere("img_name LIKE '" . $db->escapeLike($this->titlePartToKey($params['prefix'])) . "%'");
  69
  70                 if (isset ($params['minsize'])) {
  71                         $this->addWhere('img_size>=' . intval($params['minsize']));
  72                 }
  73
  74                 if (isset ($params['maxsize'])) {
  75                         $this->addWhere('img_size<=' . intval($params['maxsize']));
  76                 }
  77
  78                 $sha1 = false;
  79                 if( isset( $params['sha1'] ) ) {
  80                         $sha1 = wfBaseConvert( $params['sha1'], 16, 36, 31 );
  81                 } elseif( isset( $params['sha1base36'] ) ) {
  82                         $sha1 = $params['sha1base36'];
  83                 }
  84                 if( $sha1 ) {
  85                         $this->addWhere( 'img_sha1=' . $db->addQuotes( $sha1 ) );
  86                 }
  87
  88                 $this->addTables('image');
  89
  90                 $prop = array_flip($params['prop']);
  91                 $this->addFields( LocalFile::selectFields() );
  92
  93                 $limit = $params['limit'];
  94                 $this->addOption('LIMIT', $limit+1);
  95                 $this->addOption('ORDER BY', 'img_name' .
  96                                                 ($params['dir'] == 'descending' ? ' DESC' : ''));
  97
  98                 $res = $this->select(__METHOD__);
  99
 100                 $titles = array();
 101                 $count = 0;
 102                 $result = $this->getResult();
 103                 while ($row = $db->fetchObject($res)) {
 104                         if (++ $count > $limit) {
 105                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 106                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 107                                 $this->setContinueEnumParameter('from', $this->keyToTitle($row->img_name));
 108                                 break;
 109                         }
 110
 111                         if (is_null($resultPageSet)) {
 112                                 $file = $repo->newFileFromRow( $row );
 113                                 $info = array_merge(array('name' => $row->img_name),
 114                                         ApiQueryImageInfo::getInfo($file, $prop, $result));
 115                                 $fit = $result->addValue(array('query', $this->getModuleName()), null, $info);
 116                                 if( !$fit ) {
 117                                         $this->setContinueEnumParameter('from', $this->keyToTitle($row->img_name));
 118                                         break;
 119                                 }
 120                         } else {
 121                                 $titles[] = Title::makeTitle(NS_IMAGE, $row->img_name);
 122                         }
 123                 }
 124                 $db->freeResult($res);
 125
 126                 if (is_null($resultPageSet)) {
 127                         $result->setIndexedTagName_internal(array('query', $this->getModuleName()), 'img');
 128                 } else {
 129                         $resultPageSet->populateFromTitles($titles);
 130                 }
 131         }
 132
 133         public function getAllowedParams() {
 134                 return array (
 135                         'from' => null,
 136                         'prefix' => null,
 137                         'minsize' => array (
 138                                 ApiBase :: PARAM_TYPE => 'integer',
 139                         ),
 140                         'maxsize' => array (
 141                                 ApiBase :: PARAM_TYPE => 'integer',
 142                         ),
 143                         'limit' => array (
 144                                 ApiBase :: PARAM_DFLT => 10,
 145                                 ApiBase :: PARAM_TYPE => 'limit',
 146                                 ApiBase :: PARAM_MIN => 1,
 147                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 148                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 149                         ),
 150                         'dir' => array (
 151                                 ApiBase :: PARAM_DFLT => 'ascending',
 152                                 ApiBase :: PARAM_TYPE => array (
 153                                         'ascending',
 154                                         'descending'
 155                                 )
 156                         ),
 157                         'sha1' => null,
 158                         'sha1base36' => null,
 159                         'prop' => array (
 160                                 ApiBase :: PARAM_TYPE => array(
 161                                         'timestamp',
 162                                         'user',
 163                                         'comment',
 164                                         'url',
 165                                         'size',
 166                                         'dimensions', // Obsolete
 167                                         'mime',
 168                                         'sha1',
 169                                         'metadata',
 170                                         'bitdepth',
 171                                 ),
 172                                 ApiBase :: PARAM_DFLT => 'timestamp|url',
 173                                 ApiBase :: PARAM_ISMULTI => true
 174                         )
 175                 );
 176         }
 177
 178         public function getParamDescription() {
 179                 return array (
 180                         'from' => 'The image title to start enumerating from.',
 181                         'prefix' => 'Search for all image titles that begin with this value.',
 182                         'dir' => 'The direction in which to list',
 183                         'minsize' => 'Limit to images with at least this many bytes',
 184                         'maxsize' => 'Limit to images with at most this many bytes',
 185                         'limit' => 'How many total images to return.',
 186                         'sha1' => 'SHA1 hash of image',
 187                         'sha1base36' => 'SHA1 hash of image in base 36 (used in MediaWiki)',
 188                         'prop' => 'Which properties to get',
 189                 );
 190         }
 191
 192         public function getDescription() {
 193                 return 'Enumerate all images sequentially';
 194         }
 195
 196         protected function getExamples() {
 197                 return array (
 198                         'Simple Use',
 199                         ' Show a list of images starting at the letter "B"',
 200                         '  api.php?action=query&list=allimages&aifrom=B',
 201                         'Using as Generator',
 202                         ' Show info about 4 images starting at the letter "T"',
 203                         '  api.php?action=query&generator=allimages&gailimit=4&gaifrom=T&prop=imageinfo',
 204                 );
 205         }
 206
 207         public function getVersion() {
 208                 return __CLASS__ . ': $Id$';
 209         }
 210 }