includes/api/ApiQueryAllpages.php

   1 <?php
   2 /**
   3  *
   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         /**
  52          * @param $resultPageSet ApiPageSet
  53          * @return void
  54          */
  55         public function executeGenerator( $resultPageSet ) {
  56                 if ( $resultPageSet->isResolvingRedirects() ) {
  57                         $this->dieUsage( 'Use "gapfilterredir=nonredirects" option instead of "redirects" when using allpages as a generator', 'params' );
  58                 }
  59
  60                 $this->run( $resultPageSet );
  61         }
  62
  63         /**
  64          * @param $resultPageSet ApiPageSet
  65          * @return void
  66          */
  67         private function run( $resultPageSet = null ) {
  68                 $db = $this->getDB();
  69
  70                 $params = $this->extractRequestParams();
  71
  72                 // Page filters
  73                 $this->addTables( 'page' );
  74
  75                 if ( $params['filterredir'] == 'redirects' ) {
  76                         $this->addWhereFld( 'page_is_redirect', 1 );
  77                 } elseif ( $params['filterredir'] == 'nonredirects' ) {
  78                         $this->addWhereFld( 'page_is_redirect', 0 );
  79                 }
  80
  81                 $this->addWhereFld( 'page_namespace', $params['namespace'] );
  82                 $dir = ( $params['dir'] == 'descending' ? 'older' : 'newer' );
  83                 $from = ( is_null( $params['from'] ) ? null : $this->titlePartToKey( $params['from'] ) );
  84                 $to = ( is_null( $params['to'] ) ? null : $this->titlePartToKey( $params['to'] ) );
  85                 $this->addWhereRange( 'page_title', $dir, $from, $to );
  86
  87                 if ( isset( $params['prefix'] ) ) {
  88                         $this->addWhere( 'page_title' . $db->buildLike( $this->titlePartToKey( $params['prefix'] ), $db->anyString() ) );
  89                 }
  90
  91                 if ( is_null( $resultPageSet ) ) {
  92                         $selectFields = array(
  93                                 'page_namespace',
  94                                 'page_title',
  95                                 'page_id'
  96                         );
  97                 } else {
  98                         $selectFields = $resultPageSet->getPageTableFields();
  99                 }
 100
 101                 $this->addFields( $selectFields );
 102                 $forceNameTitleIndex = true;
 103                 if ( isset( $params['minsize'] ) ) {
 104                         $this->addWhere( 'page_len>=' . intval( $params['minsize'] ) );
 105                         $forceNameTitleIndex = false;
 106                 }
 107
 108                 if ( isset( $params['maxsize'] ) ) {
 109                         $this->addWhere( 'page_len<=' . intval( $params['maxsize'] ) );
 110                         $forceNameTitleIndex = false;
 111                 }
 112
 113                 // Page protection filtering
 114                 if ( !empty( $params['prtype'] ) ) {
 115                         $this->addTables( 'page_restrictions' );
 116                         $this->addWhere( 'page_id=pr_page' );
 117                         $this->addWhere( 'pr_expiry>' . $db->addQuotes( $db->timestamp() ) );
 118                         $this->addWhereFld( 'pr_type', $params['prtype'] );
 119
 120                         if ( isset( $params['prlevel'] ) ) {
 121                                 // Remove the empty string and '*' from the prlevel array
 122                                 $prlevel = array_diff( $params['prlevel'], array( '', '*' ) );
 123
 124                                 if ( !empty( $prlevel ) ) {
 125                                         $this->addWhereFld( 'pr_level', $prlevel );
 126                                 }
 127                         }
 128                         if ( $params['prfiltercascade'] == 'cascading' ) {
 129                                 $this->addWhereFld( 'pr_cascade', 1 );
 130                         } elseif ( $params['prfiltercascade'] == 'noncascading' ) {
 131                                 $this->addWhereFld( 'pr_cascade', 0 );
 132                         }
 133
 134                         $this->addOption( 'DISTINCT' );
 135
 136                         $forceNameTitleIndex = false;
 137
 138                 } elseif ( isset( $params['prlevel'] ) ) {
 139                         $this->dieUsage( 'prlevel may not be used without prtype', 'params' );
 140                 }
 141
 142                 if ( $params['filterlanglinks'] == 'withoutlanglinks' ) {
 143                         $this->addTables( 'langlinks' );
 144                         $this->addJoinConds( array( 'langlinks' => array( 'LEFT JOIN', 'page_id=ll_from' ) ) );
 145                         $this->addWhere( 'll_from IS NULL' );
 146                         $forceNameTitleIndex = false;
 147                 } elseif ( $params['filterlanglinks'] == 'withlanglinks' ) {
 148                         $this->addTables( 'langlinks' );
 149                         $this->addWhere( 'page_id=ll_from' );
 150                         $this->addOption( 'STRAIGHT_JOIN' );
 151                         // We have to GROUP BY all selected fields to stop
 152                         // PostgreSQL from whining
 153                         $this->addOption( 'GROUP BY', implode( ', ', $selectFields ) );
 154                         $forceNameTitleIndex = false;
 155                 }
 156
 157                 if ( $forceNameTitleIndex ) {
 158                         $this->addOption( 'USE INDEX', 'name_title' );
 159                 }
 160
 161                 $limit = $params['limit'];
 162                 $this->addOption( 'LIMIT', $limit + 1 );
 163                 $res = $this->select( __METHOD__ );
 164
 165                 $count = 0;
 166                 $result = $this->getResult();
 167                 foreach ( $res as $row ) {
 168                         if ( ++ $count > $limit ) {
 169                                 // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 170                                 // TODO: Security issue - if the user has no right to view next title, it will still be shown
 171                                 $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->page_title ) );
 172                                 break;
 173                         }
 174
 175                         if ( is_null( $resultPageSet ) ) {
 176                                 $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 177                                 $vals = array(
 178                                         'pageid' => intval( $row->page_id ),
 179                                         'ns' => intval( $title->getNamespace() ),
 180                                         'title' => $title->getPrefixedText()
 181                                 );
 182                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
 183                                 if ( !$fit ) {
 184                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->page_title ) );
 185                                         break;
 186                                 }
 187                         } else {
 188                                 $resultPageSet->processDbRow( $row );
 189                         }
 190                 }
 191
 192                 if ( is_null( $resultPageSet ) ) {
 193                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'p' );
 194                 }
 195         }
 196
 197         public function getAllowedParams() {
 198                 global $wgRestrictionTypes, $wgRestrictionLevels;
 199
 200                 return array(
 201                         'from' => null,
 202                         'to' => null,
 203                         'prefix' => null,
 204                         'namespace' => array(
 205                                 ApiBase::PARAM_DFLT => 0,
 206                                 ApiBase::PARAM_TYPE => 'namespace',
 207                         ),
 208                         'filterredir' => array(
 209                                 ApiBase::PARAM_DFLT => 'all',
 210                                 ApiBase::PARAM_TYPE => array(
 211                                         'all',
 212                                         'redirects',
 213                                         'nonredirects'
 214                                 )
 215                         ),
 216                         'minsize' => array(
 217                                 ApiBase::PARAM_TYPE => 'integer',
 218                         ),
 219                         'maxsize' => array(
 220                                 ApiBase::PARAM_TYPE => 'integer',
 221                         ),
 222                         'prtype' => array(
 223                                 ApiBase::PARAM_TYPE => $wgRestrictionTypes,
 224                                 ApiBase::PARAM_ISMULTI => true
 225                         ),
 226                         'prlevel' => array(
 227                                 ApiBase::PARAM_TYPE => $wgRestrictionLevels,
 228                                 ApiBase::PARAM_ISMULTI => true
 229                         ),
 230                         'prfiltercascade' => array(
 231                                 ApiBase::PARAM_DFLT => 'all',
 232                                 ApiBase::PARAM_TYPE => array(
 233                                         'cascading',
 234                                         'noncascading',
 235                                         'all'
 236                                 ),
 237                         ),
 238                         'limit' => array(
 239                                 ApiBase::PARAM_DFLT => 10,
 240                                 ApiBase::PARAM_TYPE => 'limit',
 241                                 ApiBase::PARAM_MIN => 1,
 242                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 243                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 244                         ),
 245                         'dir' => array(
 246                                 ApiBase::PARAM_DFLT => 'ascending',
 247                                 ApiBase::PARAM_TYPE => array(
 248                                         'ascending',
 249                                         'descending'
 250                                 )
 251                         ),
 252                         'filterlanglinks' => array(
 253                                 ApiBase::PARAM_TYPE => array(
 254                                         'withlanglinks',
 255                                         'withoutlanglinks',
 256                                         'all'
 257                                 ),
 258                                 ApiBase::PARAM_DFLT => 'all'
 259                         )
 260                 );
 261         }
 262
 263         public function getParamDescription() {
 264                 $p = $this->getModulePrefix();
 265                 return array(
 266                         'from' => 'The page title to start enumerating from',
 267                         'to' => 'The page title to stop enumerating at',
 268                         'prefix' => 'Search for all page titles that begin with this value',
 269                         'namespace' => 'The namespace to enumerate',
 270                         'filterredir' => 'Which pages to list',
 271                         'dir' => 'The direction in which to list',
 272                         'minsize' => 'Limit to pages with at least this many bytes',
 273                         'maxsize' => 'Limit to pages with at most this many bytes',
 274                         'prtype' => 'Limit to protected pages only',
 275                         'prlevel' => "The protection level (must be used with {$p}prtype= parameter)",
 276                         'prfiltercascade' => "Filter protections based on cascadingness (ignored when {$p}prtype isn't set)",
 277                         'filterlanglinks' => 'Filter based on whether a page has langlinks',
 278                         'limit' => 'How many total pages to return.'
 279                 );
 280         }
 281
 282         public function getDescription() {
 283                 return 'Enumerate all pages sequentially in a given namespace';
 284         }
 285
 286         public function getPossibleErrors() {
 287                 return array_merge( parent::getPossibleErrors(), array(
 288                         array( 'code' => 'params', 'info' => 'Use "gapfilterredir=nonredirects" option instead of "redirects" when using allpages as a generator' ),
 289                         array( 'code' => 'params', 'info' => 'prlevel may not be used without prtype' ),
 290                 ) );
 291         }
 292
 293         protected function getExamples() {
 294                 return array(
 295                         'Simple Use',
 296                         ' Show a list of pages starting at the letter "B"',
 297                         '  api.php?action=query&list=allpages&apfrom=B',
 298                         'Using as Generator',
 299                         ' Show info about 4 pages starting at the letter "T"',
 300                         '  api.php?action=query&generator=allpages&gaplimit=4&gapfrom=T&prop=info',
 301                         ' Show content of first 2 non-redirect pages begining at "Re"',
 302                         '  api.php?action=query&generator=allpages&gaplimit=2&gapfilterredir=nonredirects&gapfrom=Re&prop=revisions&rvprop=content'
 303                 );
 304         }
 305
 306         public function getVersion() {
 307                 return __CLASS__ . ': $Id$';
 308         }
 309 }