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  * @addtogroup 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('categorylinks');
  57                 $this->addFields('cl_to');
  58
  59                 if (!is_null($params['from']))
  60                         $this->addWhere('cl_to>=' . $db->addQuotes(ApiQueryBase :: titleToKey($params['from'])));
  61                 if (isset ($params['prefix']))
  62                         $this->addWhere("cl_to LIKE '" . $db->escapeLike(ApiQueryBase :: titleToKey($params['prefix'])) . "%'");
  63
  64                 $this->addOption('LIMIT', $params['limit']+1);
  65                 $this->addOption('ORDER BY', 'cl_to' . ($params['dir'] == 'descending' ? ' DESC' : ''));
  66                 $this->addOption('DISTINCT');
  67
  68                 $res = $this->select(__METHOD__);
  69
  70                 $pages = array();
  71                 $count = 0;
  72                 while ($row = $db->fetchObject($res)) {
  73                         if (++ $count > $params['limit']) {
  74                                 // We've reached the one extra which shows that there are additional cats to be had. Stop here...
  75                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
  76                                 $this->setContinueEnumParameter('from', ApiQueryBase :: keyToTitle($row->cl_to));
  77                                 break;
  78                         }
  79
  80                         // Normalize titles
  81                         $titleObj = Title::makeTitle(NS_CATEGORY, $row->cl_to);
  82                         if(!is_null($resultPageSet))
  83                                 $pages[] = $titleObj->getPrefixedText();
  84                         else
  85                                 // Don't show "Category:" everywhere in non-generator mode
  86                                 $pages[] = $titleObj->getText();
  87                 }
  88                 $db->freeResult($res);
  89
  90                 if (is_null($resultPageSet)) {
  91                         $result = $this->getResult();
  92                         $result->setIndexedTagName($pages, 'c');
  93                         $result->addValue('query', $this->getModuleName(), $pages);
  94                 } else {
  95                         $resultPageSet->populateFromTitles($pages);
  96                 }
  97         }
  98
  99         protected function getAllowedParams() {
 100                 return array (
 101                         'from' => null,
 102                         'prefix' => null,
 103                         'dir' => array(
 104                                 ApiBase :: PARAM_DFLT => 'ascending',
 105                                 ApiBase :: PARAM_TYPE => array(
 106                                         'ascending',
 107                                         'descending'
 108                                 ),
 109                         ),
 110                         'limit' => array (
 111                                 ApiBase :: PARAM_DFLT => 10,
 112                                 ApiBase :: PARAM_TYPE => 'limit',
 113                                 ApiBase :: PARAM_MIN => 1,
 114                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 115                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 116                         )
 117                 );
 118         }
 119
 120         protected function getParamDescription() {
 121                 return array (
 122                         'from' => 'The category to start enumerating from.',
 123                         'prefix' => 'Search for all category titles that begin with this value.',
 124                         'dir' => 'Direction to sort in.',
 125                         'limit' => 'How many categories to return.'
 126                 );
 127         }
 128
 129         protected function getDescription() {
 130                 return 'Enumerate all categories';
 131         }
 132
 133         protected function getExamples() {
 134                 return array (
 135                         'api.php?action=query&generator=allcategories&gacprefix=List&prop=info',
 136                 );
 137         }
 138
 139         public function getVersion() {
 140                 return __CLASS__ . ': $Id: ApiQueryAllLinks.php 28216 2007-12-06 18:33:18Z vasilievvv $';
 141         }
 142 }