includes/api/ApiQueryAllCategories.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on December 12, 2007
   6  *
   7  * Copyright © 2007 Roan Kattouw <Firstname>.<Lastname>@gmail.com
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * Query module to enumerate all categories, even the ones that don't have
  29  * category pages.
  30  *
  31  * @ingroup API
  32  */
  33 class ApiQueryAllCategories extends ApiQueryGeneratorBase {
  34
  35         public function __construct( $query, $moduleName ) {
  36                 parent::__construct( $query, $moduleName, 'ac' );
  37         }
  38
  39         public function execute() {
  40                 $this->run();
  41         }
  42
  43         public function getCacheMode( $params ) {
  44                 return 'public';
  45         }
  46
  47         public function executeGenerator( $resultPageSet ) {
  48                 $this->run( $resultPageSet );
  49         }
  50
  51         /**
  52          * @param $resultPageSet ApiPageSet
  53          * @return void
  54          */
  55         private function run( $resultPageSet = null ) {
  56                 $db = $this->getDB();
  57                 $params = $this->extractRequestParams();
  58
  59                 $this->addTables( 'category' );
  60                 $this->addFields( 'cat_title' );
  61
  62                 $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
  63                 $from = ( is_null( $params['from'] ) ? null : $this->titlePartToKey( $params['from'] ) );
  64                 $to = ( is_null( $params['to'] ) ? null : $this->titlePartToKey( $params['to'] ) );
  65                 $this->addWhereRange( 'cat_title', $dir, $from, $to );
  66
  67                 $min = $params['min'];
  68                 $max = $params['max'];
  69                 $this->addWhereRange( 'cat_pages', $dir, $min, $max );
  70
  71                 if ( isset( $params['prefix'] ) ) {
  72                         $this->addWhere( 'cat_title' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
  73                 }
  74
  75                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
  76                 $this->addOption( 'ORDER BY', 'cat_title' . ( $params['dir'] == 'descending' ? ' DESC' : '' ) );
  77
  78                 $prop = array_flip( $params['prop'] );
  79                 $this->addFieldsIf( array( 'cat_pages', 'cat_subcats', 'cat_files' ), isset( $prop['size'] ) );
  80                 if ( isset( $prop['hidden'] ) ) {
  81                         $this->addTables( array( 'page', 'page_props' ) );
  82                         $this->addJoinConds( array(
  83                                 'page' => array( 'LEFT JOIN', array(
  84                                         'page_namespace' => NS_CATEGORY,
  85                                         'page_title=cat_title' ) ),
  86                                 'page_props' => array( 'LEFT JOIN', array(
  87                                         'pp_page=page_id',
  88                                         'pp_propname' => 'hiddencat' ) ),
  89                         ) );
  90                         $this->addFields( 'pp_propname AS cat_hidden' );
  91                 }
  92
  93                 $res = $this->select( __METHOD__ );
  94
  95                 $pages = array();
  96
  97                 $result = $this->getResult();
  98                 $count = 0;
  99                 foreach ( $res as $row ) {
 100                         if ( ++ $count > $params['limit'] ) {
 101                                 // We've reached the one extra which shows that there are additional cats to be had. Stop here...
 102                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 103                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->cat_title ) );
 104                                 break;
 105                         }
 106
 107                         // Normalize titles
 108                         $titleObj = Title::makeTitle( NS_CATEGORY, $row->cat_title );
 109                         if ( !is_null( $resultPageSet ) ) {
 110                                 $pages[] = $titleObj->getPrefixedText();
 111                         } else {
 112                                 $item = array();
 113                                 $result->setContent( $item, $titleObj->getText() );
 114                                 if ( isset( $prop['size'] ) ) {
 115                                         $item['size'] = intval( $row->cat_pages );
 116                                         $item['pages'] = $row->cat_pages - $row->cat_subcats - $row->cat_files;
 117                                         $item['files'] = intval( $row->cat_files );
 118                                         $item['subcats'] = intval( $row->cat_subcats );
 119                                 }
 120                                 if ( isset( $prop['hidden'] ) && $row->cat_hidden ) {
 121                                         $item['hidden'] = '';
 122                                 }
 123                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $item );
 124                                 if ( !$fit ) {
 125                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->cat_title ) );
 126                                         break;
 127                                 }
 128                         }
 129                 }
 130
 131                 if ( is_null( $resultPageSet ) ) {
 132                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'c' );
 133                 } else {
 134                         $resultPageSet->populateFromTitles( $pages );
 135                 }
 136         }
 137
 138         public function getAllowedParams() {
 139                 return array(
 140                         'from' => null,
 141                         'to' => null,
 142                         'prefix' => null,
 143                         'dir' => array(
 144                                 ApiBase::PARAM_DFLT => 'ascending',
 145                                 ApiBase::PARAM_TYPE => array(
 146                                         'ascending',
 147                                         'descending'
 148                                 ),
 149                         ),
 150                         'min' => array(
 151                                 ApiBase::PARAM_DFLT => null,
 152                                 ApiBase::PARAM_TYPE => 'integer'
 153                         ),
 154                         'max' => array(
 155                                 ApiBase::PARAM_DFLT => null,
 156                                 ApiBase::PARAM_TYPE => 'integer'
 157                         ),
 158                         'limit' => array(
 159                                 ApiBase::PARAM_DFLT => 10,
 160                                 ApiBase::PARAM_TYPE => 'limit',
 161                                 ApiBase::PARAM_MIN => 1,
 162                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 163                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 164                         ),
 165                         'prop' => array(
 166                                 ApiBase::PARAM_TYPE => array( 'size', 'hidden' ),
 167                                 ApiBase::PARAM_DFLT => '',
 168                                 ApiBase::PARAM_ISMULTI => true
 169                         ),
 170                 );
 171         }
 172
 173         public function getParamDescription() {
 174                 return array(
 175                         'from' => 'The category to start enumerating from',
 176                         'to' => 'The category to stop enumerating at',
 177                         'prefix' => 'Search for all category titles that begin with this value',
 178                         'dir' => 'Direction to sort in',
 179                         'min' => 'Minimum number of category members',
 180                         'max' => 'Maximum number of category members',
 181                         'limit' => 'How many categories to return',
 182                         'prop' => array(
 183                                 'Which properties to get',
 184                                 ' size    - Adds number of pages in the category',
 185                                 ' hidden  - Tags categories that are hidden with __HIDDENCAT__',
 186                         ),
 187                 );
 188         }
 189
 190         public function getDescription() {
 191                 return 'Enumerate all categories';
 192         }
 193
 194         public function getExamples() {
 195                 return array(
 196                         'api.php?action=query&list=allcategories&acprop=size',
 197                         'api.php?action=query&generator=allcategories&gacprefix=List&prop=info',
 198                 );
 199         }
 200
 201         public function getHelpUrls() {
 202                 return 'http://www.mediawiki.org/wiki/API:Allcategories';
 203         }
 204
 205         public function getVersion() {
 206                 return __CLASS__ . ': $Id$';
 207         }
 208 }