includes/api/ApiQueryAllCategories.php

   1 <?php
   2
   3 /*
   4  * Created on December 12, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 2007 Roan Kattouw <Firstname>.<Lastname>@home.nl
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once ( 'ApiQueryBase.php' );
  29 }
  30
  31 /**
  32  * Query module to enumerate all categories, even the ones that don't have
  33  * category pages.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryAllCategories extends ApiQueryGeneratorBase {
  38
  39         public function __construct( $query, $moduleName ) {
  40                 parent :: __construct( $query, $moduleName, 'ac' );
  41         }
  42
  43         public function execute() {
  44                 $this->run();
  45         }
  46
  47         public function executeGenerator( $resultPageSet ) {
  48                 $this->run( $resultPageSet );
  49         }
  50
  51         private function run( $resultPageSet = null ) {
  52
  53                 $db = $this->getDB();
  54                 $params = $this->extractRequestParams();
  55
  56                 $this->addTables( 'category' );
  57                 $this->addFields( 'cat_title' );
  58
  59                 $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
  60                 $from = ( is_null( $params['from'] ) ? null : $this->titlePartToKey( $params['from'] ) );
  61                 $this->addWhereRange( 'cat_title', $dir, $from, null );
  62                 if ( isset ( $params['prefix'] ) )
  63                         $this->addWhere( 'cat_title' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
  64
  65                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
  66                 $this->addOption( 'ORDER BY', 'cat_title' . ( $params['dir'] == 'descending' ? ' DESC' : '' ) );
  67
  68                 $prop = array_flip( $params['prop'] );
  69                 $this->addFieldsIf( array( 'cat_pages', 'cat_subcats', 'cat_files' ), isset( $prop['size'] ) );
  70                 if ( isset( $prop['hidden'] ) )
  71                 {
  72                         $this->addTables( array( 'page', 'page_props' ) );
  73                         $this->addJoinConds( array(
  74                                 'page' => array( 'LEFT JOIN', array(
  75                                         'page_namespace' => NS_CATEGORY,
  76                                         'page_title=cat_title' ) ),
  77                                 'page_props' => array( 'LEFT JOIN', array(
  78                                         'pp_page=page_id',
  79                                         'pp_propname' => 'hiddencat' ) ),
  80                         ) );
  81                         $this->addFields( 'pp_propname AS cat_hidden' );
  82                 }
  83
  84                 $res = $this->select( __METHOD__ );
  85
  86                 $pages = array();
  87                 $categories = array();
  88                 $result = $this->getResult();
  89                 $count = 0;
  90                 while ( $row = $db->fetchObject( $res ) ) {
  91                         if ( ++ $count > $params['limit'] ) {
  92                                 // We've reached the one extra which shows that there are additional cats to be had. Stop here...
  93                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
  94                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->cat_title ) );
  95                                 break;
  96                         }
  97
  98                         // Normalize titles
  99                         $titleObj = Title::makeTitle( NS_CATEGORY, $row->cat_title );
 100                         if ( !is_null( $resultPageSet ) )
 101                                 $pages[] = $titleObj->getPrefixedText();
 102                         else {
 103                                 $item = array();
 104                                 $result->setContent( $item, $titleObj->getText() );
 105                                 if ( isset( $prop['size'] ) ) {
 106                                         $item['size'] = intval( $row->cat_pages );
 107                                         $item['pages'] = $row->cat_pages - $row->cat_subcats - $row->cat_files;
 108                                         $item['files'] = intval( $row->cat_files );
 109                                         $item['subcats'] = intval( $row->cat_subcats );
 110                                 }
 111                                 if ( isset( $prop['hidden'] ) && $row->cat_hidden )
 112                                         $item['hidden'] = '';
 113                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $item );
 114                                 if ( !$fit )
 115                                 {
 116                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->cat_title ) );
 117                                         break;
 118                                 }
 119                         }
 120                 }
 121                 $db->freeResult( $res );
 122
 123                 if ( is_null( $resultPageSet ) ) {
 124                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'c' );
 125                 } else {
 126                         $resultPageSet->populateFromTitles( $pages );
 127                 }
 128         }
 129
 130         public function getAllowedParams() {
 131                 return array (
 132                         'from' => null,
 133                         'prefix' => null,
 134                         'dir' => array(
 135                                 ApiBase :: PARAM_DFLT => 'ascending',
 136                                 ApiBase :: PARAM_TYPE => array(
 137                                         'ascending',
 138                                         'descending'
 139                                 ),
 140                         ),
 141                         'limit' => array (
 142                                 ApiBase :: PARAM_DFLT => 10,
 143                                 ApiBase :: PARAM_TYPE => 'limit',
 144                                 ApiBase :: PARAM_MIN => 1,
 145                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 146                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 147                         ),
 148                         'prop' => array (
 149                                 ApiBase :: PARAM_TYPE => array( 'size', 'hidden' ),
 150                                 ApiBase :: PARAM_DFLT => '',
 151                                 ApiBase :: PARAM_ISMULTI => true
 152                         ),
 153                 );
 154         }
 155
 156         public function getParamDescription() {
 157                 return array (
 158                         'from' => 'The category to start enumerating from.',
 159                         'prefix' => 'Search for all category titles that begin with this value.',
 160                         'dir' => 'Direction to sort in.',
 161                         'limit' => 'How many categories to return.',
 162                         'prop' => 'Which properties to get',
 163                 );
 164         }
 165
 166         public function getDescription() {
 167                 return 'Enumerate all categories';
 168         }
 169
 170         protected function getExamples() {
 171                 return array (
 172                         'api.php?action=query&list=allcategories&acprop=size',
 173                         'api.php?action=query&generator=allcategories&gacprefix=List&prop=info',
 174                 );
 175         }
 176
 177         public function getVersion() {
 178                 return __CLASS__ . ': $Id$';
 179         }
 180 }