includes/api/ApiQueryAllpages.php

   1 <?php
   2
   3 /*
   4  * Created on Sep 25, 2006
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   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 available pages.
  33  *
  34  * @ingroup API
  35  */
  36 class ApiQueryAllpages extends ApiQueryGeneratorBase {
  37
  38         public function __construct($query, $moduleName) {
  39                 parent :: __construct($query, $moduleName, 'ap');
  40         }
  41
  42         public function execute() {
  43                 $this->run();
  44         }
  45
  46         public function executeGenerator($resultPageSet) {
  47                 if ($resultPageSet->isResolvingRedirects())
  48                         $this->dieUsage('Use "gapfilterredir=nonredirects" option instead of "redirects" when using allpages as a generator', 'params');
  49
  50                 $this->run($resultPageSet);
  51         }
  52
  53         private function run($resultPageSet = null) {
  54
  55                 $db = $this->getDB();
  56
  57                 $params = $this->extractRequestParams();
  58
  59                 // Page filters
  60                 $this->addTables('page');
  61                 if (!$this->addWhereIf('page_is_redirect = 1', $params['filterredir'] === 'redirects'))
  62                         $this->addWhereIf('page_is_redirect = 0', $params['filterredir'] === 'nonredirects');
  63                 $this->addWhereFld('page_namespace', $params['namespace']);
  64                 $dir = ($params['dir'] == 'descending' ? 'older' : 'newer');
  65                 $from = (is_null($params['from']) ? null : $this->titlePartToKey($params['from']));
  66                 $this->addWhereRange('page_title', $dir, $from, null);
  67                 if (isset ($params['prefix']))
  68                         $this->addWhere("page_title LIKE '" . $db->escapeLike($this->titlePartToKey($params['prefix'])) . "%'");
  69
  70                 $forceNameTitleIndex = true;
  71                 if (isset ($params['minsize'])) {
  72                         $this->addWhere('page_len>=' . intval($params['minsize']));
  73                         $forceNameTitleIndex = false;
  74                 }
  75
  76                 if (isset ($params['maxsize'])) {
  77                         $this->addWhere('page_len<=' . intval($params['maxsize']));
  78                         $forceNameTitleIndex = false;
  79                 }
  80
  81                 // Page protection filtering
  82                 if (isset ($params['prtype'])) {
  83                         $this->addTables('page_restrictions');
  84                         $this->addWhere('page_id=pr_page');
  85                         $this->addWhere('pr_expiry>' . $db->addQuotes($db->timestamp()));
  86                         $this->addWhereFld('pr_type', $params['prtype']);
  87
  88                         $prlevel = $params['prlevel'];
  89                         if (!is_null($prlevel) && $prlevel != '' && $prlevel != '*')
  90                                 $this->addWhereFld('pr_level', $prlevel);
  91
  92                         $this->addOption('DISTINCT');
  93
  94                         $forceNameTitleIndex = false;
  95
  96                 } else if (isset ($params['prlevel'])) {
  97                         $this->dieUsage('prlevel may not be used without prtype', 'params');
  98                 }
  99
 100                 if($params['filterlanglinks'] == 'withoutlanglinks') {
 101                         $this->addTables('langlinks');
 102                         $this->addJoinConds(array('langlinks' => array('LEFT JOIN', 'page_id=ll_from')));
 103                         $this->addWhere('ll_from IS NULL');
 104                         $forceNameTitleIndex = false;
 105                 } else if($params['filterlanglinks'] == 'withlanglinks') {
 106                         $this->addTables('langlinks');
 107                         $this->addWhere('page_id=ll_from');
 108                         $forceNameTitleIndex = false;
 109                 }
 110                 if ($forceNameTitleIndex)
 111                         $this->addOption('USE INDEX', 'name_title');
 112
 113                 if (is_null($resultPageSet)) {
 114                         $this->addFields(array (
 115                                 'page_id',
 116                                 'page_namespace',
 117                                 'page_title'
 118                         ));
 119                 } else {
 120                         $this->addFields($resultPageSet->getPageTableFields());
 121                 }
 122
 123                 $limit = $params['limit'];
 124                 $this->addOption('LIMIT', $limit+1);
 125                 $res = $this->select(__METHOD__);
 126
 127                 $data = array ();
 128                 $count = 0;
 129                 while ($row = $db->fetchObject($res)) {
 130                         if (++ $count > $limit) {
 131                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 132                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 133                                 $this->setContinueEnumParameter('from', $this->keyToTitle($row->page_title));
 134                                 break;
 135                         }
 136
 137                         if (is_null($resultPageSet)) {
 138                                 $title = Title :: makeTitle($row->page_namespace, $row->page_title);
 139                                 $data[] = array(
 140                                         'pageid' => intval($row->page_id),
 141                                         'ns' => intval($title->getNamespace()),
 142                                         'title' => $title->getPrefixedText());
 143                         } else {
 144                                 $resultPageSet->processDbRow($row);
 145                         }
 146                 }
 147                 $db->freeResult($res);
 148
 149                 if (is_null($resultPageSet)) {
 150                         $result = $this->getResult();
 151                         $result->setIndexedTagName($data, 'p');
 152                         $result->addValue('query', $this->getModuleName(), $data);
 153                 }
 154         }
 155
 156         public function getAllowedParams() {
 157                 global $wgRestrictionTypes, $wgRestrictionLevels;
 158
 159                 return array (
 160                         'from' => null,
 161                         'prefix' => null,
 162                         'namespace' => array (
 163                                 ApiBase :: PARAM_DFLT => 0,
 164                                 ApiBase :: PARAM_TYPE => 'namespace',
 165                         ),
 166                         'filterredir' => array (
 167                                 ApiBase :: PARAM_DFLT => 'all',
 168                                 ApiBase :: PARAM_TYPE => array (
 169                                         'all',
 170                                         'redirects',
 171                                         'nonredirects'
 172                                 )
 173                         ),
 174                         'minsize' => array (
 175                                 ApiBase :: PARAM_TYPE => 'integer',
 176                         ),
 177                         'maxsize' => array (
 178                                 ApiBase :: PARAM_TYPE => 'integer',
 179                         ),
 180                         'prtype' => array (
 181                                 ApiBase :: PARAM_TYPE => $wgRestrictionTypes,
 182                                 ApiBase :: PARAM_ISMULTI => true
 183                         ),
 184                         'prlevel' => array (
 185                                 ApiBase :: PARAM_TYPE => $wgRestrictionLevels,
 186                                 ApiBase :: PARAM_ISMULTI => true
 187                         ),
 188                         'limit' => array (
 189                                 ApiBase :: PARAM_DFLT => 10,
 190                                 ApiBase :: PARAM_TYPE => 'limit',
 191                                 ApiBase :: PARAM_MIN => 1,
 192                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 193                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 194                         ),
 195                         'dir' => array (
 196                                 ApiBase :: PARAM_DFLT => 'ascending',
 197                                 ApiBase :: PARAM_TYPE => array (
 198                                         'ascending',
 199                                         'descending'
 200                                 )
 201                         ),
 202                         'filterlanglinks' => array(
 203                                 ApiBase :: PARAM_TYPE => array(
 204                                         'withlanglinks',
 205                                         'withoutlanglinks',
 206                                         'all'
 207                                 ),
 208                                 ApiBase :: PARAM_DFLT => 'all'
 209                         )
 210                 );
 211         }
 212
 213         public function getParamDescription() {
 214                 return array (
 215                         'from' => 'The page title to start enumerating from.',
 216                         'prefix' => 'Search for all page titles that begin with this value.',
 217                         'namespace' => 'The namespace to enumerate.',
 218                         'filterredir' => 'Which pages to list.',
 219                         'dir' => 'The direction in which to list',
 220                         'minsize' => 'Limit to pages with at least this many bytes',
 221                         'maxsize' => 'Limit to pages with at most this many bytes',
 222                         'prtype' => 'Limit to protected pages only',
 223                         'prlevel' => 'The protection level (must be used with apprtype= parameter)',
 224                         'filterlanglinks' => 'Filter based on whether a page has langlinks',
 225                         'limit' => 'How many total pages to return.'
 226                 );
 227         }
 228
 229         public function getDescription() {
 230                 return 'Enumerate all pages sequentially in a given namespace';
 231         }
 232
 233         protected function getExamples() {
 234                 return array (
 235                         'Simple Use',
 236                         ' Show a list of pages starting at the letter "B"',
 237                         '  api.php?action=query&list=allpages&apfrom=B',
 238                         'Using as Generator',
 239                         ' Show info about 4 pages starting at the letter "T"',
 240                         '  api.php?action=query&generator=allpages&gaplimit=4&gapfrom=T&prop=info',
 241                         ' Show content of first 2 non-redirect pages begining at "Re"',
 242                         '  api.php?action=query&generator=allpages&gaplimit=2&gapfilterredir=nonredirects&gapfrom=Re&prop=revisions&rvprop=content'
 243                 );
 244         }
 245
 246         public function getVersion() {
 247                 return __CLASS__ . ': $Id$';
 248         }
 249 }