includes/api/ApiQueryAllpages.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.8+
   4  *
   5  * Created on Sep 25, 2006
   6  *
   7  * Copyright © 2006 Yuri Astrakhan <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 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 ApiQueryAllpages extends ApiQueryGeneratorBase {
  38
  39         public function __construct( $query, $moduleName ) {
  40                 parent::__construct( $query, $moduleName, 'ap' );
  41         }
  42
  43         public function execute() {
  44                 $this->run();
  45         }
  46
  47         public function getCacheMode( $params ) {
  48                 return 'public';
  49         }
  50
  51         public function executeGenerator( $resultPageSet ) {
  52                 if ( $resultPageSet->isResolvingRedirects() ) {
  53                         $this->dieUsage( 'Use "gapfilterredir=nonredirects" option instead of "redirects" when using allpages as a generator', 'params' );
  54                 }
  55
  56                 $this->run( $resultPageSet );
  57         }
  58
  59         private function run( $resultPageSet = null ) {
  60                 $db = $this->getDB();
  61
  62                 $params = $this->extractRequestParams();
  63
  64                 // Page filters
  65                 $this->addTables( 'page' );
  66
  67                 if ( $params['filterredir'] == 'redirects' ) {
  68                         $this->addWhereFld( 'page_is_redirect', 1 );
  69                 } elseif ( $params['filterredir'] == 'nonredirects' ) {
  70                         $this->addWhereFld( 'page_is_redirect', 0 );
  71                 }
  72
  73                 $this->addWhereFld( 'page_namespace', $params['namespace'] );
  74                 $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
  75                 $from = ( is_null( $params['from'] ) ? null : $this->titlePartToKey( $params['from'] ) );
  76                 $to = ( is_null( $params['to'] ) ? null : $this->titlePartToKey( $params['to'] ) );
  77                 $this->addWhereRange( 'page_title', $dir, $from, $to );
  78
  79                 if ( isset( $params['prefix'] ) ) {
  80                         $this->addWhere( 'page_title' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
  81                 }
  82
  83                 if ( is_null( $resultPageSet ) ) {
  84                         $selectFields = array(
  85                                 'page_namespace',
  86                                 'page_title',
  87                                 'page_id'
  88                         );
  89                 } else {
  90                         $selectFields = $resultPageSet->getPageTableFields();
  91                 }
  92
  93                 $this->addFields( $selectFields );
  94                 $forceNameTitleIndex = true;
  95                 if ( isset( $params['minsize'] ) ) {
  96                         $this->addWhere( 'page_len>=' . intval( $params['minsize'] ) );
  97                         $forceNameTitleIndex = false;
  98                 }
  99
 100                 if ( isset( $params['maxsize'] ) ) {
 101                         $this->addWhere( 'page_len<=' . intval( $params['maxsize'] ) );
 102                         $forceNameTitleIndex = false;
 103                 }
 104
 105                 // Page protection filtering
 106                 if ( !empty( $params['prtype'] ) ) {
 107                         $this->addTables( 'page_restrictions' );
 108                         $this->addWhere( 'page_id=pr_page' );
 109                         $this->addWhere( 'pr_expiry>' . $db->addQuotes( $db->timestamp() ) );
 110                         $this->addWhereFld( 'pr_type', $params['prtype'] );
 111
 112                         if ( isset( $params['prlevel'] ) ) {
 113                                 // Remove the empty string and '*' from the prlevel array
 114                                 $prlevel = array_diff( $params['prlevel'], array( '', '*' ) );
 115
 116                                 if ( !empty( $prlevel ) ) {
 117                                         $this->addWhereFld( 'pr_level', $prlevel );
 118                                 }
 119                         }
 120                         if ( $params['prfiltercascade'] == 'cascading' ) {
 121                                 $this->addWhereFld( 'pr_cascade', 1 );
 122                         } elseif ( $params['prfiltercascade'] == 'noncascading' ) {
 123                                 $this->addWhereFld( 'pr_cascade', 0 );
 124                         }
 125
 126                         $this->addOption( 'DISTINCT' );
 127
 128                         $forceNameTitleIndex = false;
 129
 130                 } elseif ( isset( $params['prlevel'] ) ) {
 131                         $this->dieUsage( 'prlevel may not be used without prtype', 'params' );
 132                 }
 133
 134                 if ( $params['filterlanglinks'] == 'withoutlanglinks' ) {
 135                         $this->addTables( 'langlinks' );
 136                         $this->addJoinConds( array( 'langlinks' => array( 'LEFT JOIN', 'page_id=ll_from' ) ) );
 137                         $this->addWhere( 'll_from IS NULL' );
 138                         $forceNameTitleIndex = false;
 139                 } elseif ( $params['filterlanglinks'] == 'withlanglinks' ) {
 140                         $this->addTables( 'langlinks' );
 141                         $this->addWhere( 'page_id=ll_from' );
 142                         $this->addOption( 'STRAIGHT_JOIN' );
 143                         // We have to GROUP BY all selected fields to stop
 144                         // PostgreSQL from whining
 145                         $this->addOption( 'GROUP BY', implode( ', ', $selectFields ) );
 146                         $forceNameTitleIndex = false;
 147                 }
 148
 149                 if ( $forceNameTitleIndex ) {
 150                         $this->addOption( 'USE INDEX', 'name_title' );
 151                 }
 152
 153                 $limit = $params['limit'];
 154                 $this->addOption( 'LIMIT', $limit + 1 );
 155                 $res = $this->select( __METHOD__ );
 156
 157                 $count = 0;
 158                 $result = $this->getResult();
 159                 foreach ( $res as $row ) {
 160                         if ( ++ $count > $limit ) {
 161                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 162                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 163                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->page_title ) );
 164                                 break;
 165                         }
 166
 167                         if ( is_null( $resultPageSet ) ) {
 168                                 $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 169                                 $vals = array(
 170                                         'pageid' => intval( $row->page_id ),
 171                                         'ns' => intval( $title->getNamespace() ),
 172                                         'title' => $title->getPrefixedText()
 173                                 );
 174                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 175                                 if ( !$fit ) {
 176                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->page_title ) );
 177                                         break;
 178                                 }
 179                         } else {
 180                                 $resultPageSet->processDbRow( $row );
 181                         }
 182                 }
 183
 184                 if ( is_null( $resultPageSet ) ) {
 185                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'p' );
 186                 }
 187         }
 188
 189         public function getAllowedParams() {
 190                 global $wgRestrictionLevels;
 191
 192                 return array(
 193                         'from' => null,
 194                         'to' => null,
 195                         'prefix' => null,
 196                         'namespace' => array(
 197                                 ApiBase::PARAM_DFLT => 0,
 198                                 ApiBase::PARAM_TYPE => 'namespace',
 199                         ),
 200                         'filterredir' => array(
 201                                 ApiBase::PARAM_DFLT => 'all',
 202                                 ApiBase::PARAM_TYPE => array(
 203                                         'all',
 204                                         'redirects',
 205                                         'nonredirects'
 206                                 )
 207                         ),
 208                         'minsize' => array(
 209                                 ApiBase::PARAM_TYPE => 'integer',
 210                         ),
 211                         'maxsize' => array(
 212                                 ApiBase::PARAM_TYPE => 'integer',
 213                         ),
 214                         'prtype' => array(
 215                                 ApiBase::PARAM_TYPE => Title::getFilteredRestrictionTypes( true ),
 216                                 ApiBase::PARAM_ISMULTI => true
 217                         ),
 218                         'prlevel' => array(
 219                                 ApiBase::PARAM_TYPE => $wgRestrictionLevels,
 220                                 ApiBase::PARAM_ISMULTI => true
 221                         ),
 222                         'prfiltercascade' => array(
 223                                 ApiBase::PARAM_DFLT => 'all',
 224                                 ApiBase::PARAM_TYPE => array(
 225                                         'cascading',
 226                                         'noncascading',
 227                                         'all'
 228                                 ),
 229                         ),
 230                         'limit' => array(
 231                                 ApiBase::PARAM_DFLT => 10,
 232                                 ApiBase::PARAM_TYPE => 'limit',
 233                                 ApiBase::PARAM_MIN => 1,
 234                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 235                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 236                         ),
 237                         'dir' => array(
 238                                 ApiBase::PARAM_DFLT => 'ascending',
 239                                 ApiBase::PARAM_TYPE => array(
 240                                         'ascending',
 241                                         'descending'
 242                                 )
 243                         ),
 244                         'filterlanglinks' => array(
 245                                 ApiBase::PARAM_TYPE => array(
 246                                         'withlanglinks',
 247                                         'withoutlanglinks',
 248                                         'all'
 249                                 ),
 250                                 ApiBase::PARAM_DFLT => 'all'
 251                         )
 252                 );
 253         }
 254
 255         public function getParamDescription() {
 256                 $p = $this->getModulePrefix();
 257                 return array(
 258                         'from' => 'The page title to start enumerating from',
 259                         'to' => 'The page title to stop enumerating at',
 260                         'prefix' => 'Search for all page titles that begin with this value',
 261                         'namespace' => 'The namespace to enumerate',
 262                         'filterredir' => 'Which pages to list',
 263                         'dir' => 'The direction in which to list',
 264                         'minsize' => 'Limit to pages with at least this many bytes',
 265                         'maxsize' => 'Limit to pages with at most this many bytes',
 266                         'prtype' => 'Limit to protected pages only',
 267                         'prlevel' => "The protection level (must be used with {$p}prtype= parameter)",
 268                         'prfiltercascade' => "Filter protections based on cascadingness (ignored when {$p}prtype isn't set)",
 269                         'filterlanglinks' => 'Filter based on whether a page has langlinks',
 270                         'limit' => 'How many total pages to return.'
 271                 );
 272         }
 273
 274         public function getDescription() {
 275                 return 'Enumerate all pages sequentially in a given namespace';
 276         }
 277
 278         public function getPossibleErrors() {
 279                 return array_merge( parent::getPossibleErrors(), array(
 280                         array( 'code' => 'params', 'info' => 'Use "gapfilterredir=nonredirects" option instead of "redirects" when using allpages as a generator' ),
 281                         array( 'code' => 'params', 'info' => 'prlevel may not be used without prtype' ),
 282                 ) );
 283         }
 284
 285         protected function getExamples() {
 286                 return array(
 287                         'Simple Use',
 288                         ' Show a list of pages starting at the letter "B"',
 289                         '  api.php?action=query&list=allpages&apfrom=B',
 290                         'Using as Generator',
 291                         ' Show info about 4 pages starting at the letter "T"',
 292                         '  api.php?action=query&generator=allpages&gaplimit=4&gapfrom=T&prop=info',
 293                         ' Show content of first 2 non-redirect pages begining at "Re"',
 294                         '  api.php?action=query&generator=allpages&gaplimit=2&gapfilterredir=nonredirects&gapfrom=Re&prop=revisions&rvprop=content'
 295                 );
 296         }
 297
 298         public function getVersion() {
 299                 return __CLASS__ . ': $Id$';
 300         }
 301 }