includes/api/ApiQueryQueryPage.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Dec 22, 2010
   6  *
   7  * Copyright © 2010 Roan Kattouw "<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 /**
  28  * Query module to get the results of a QueryPage-based special page
  29  *
  30  * @ingroup API
  31  */
  32 class ApiQueryQueryPage extends ApiQueryGeneratorBase {
  33         private $qpMap;
  34
  35         public function __construct( ApiQuery $query, $moduleName ) {
  36                 parent::__construct( $query, $moduleName, 'qp' );
  37                 // Build mapping from special page names to QueryPage classes
  38                 $uselessQueryPages = $this->getConfig()->get( 'APIUselessQueryPages' );
  39                 $this->qpMap = array();
  40                 foreach ( QueryPage::getPages() as $page ) {
  41                         if ( !in_array( $page[1], $uselessQueryPages ) ) {
  42                                 $this->qpMap[$page[1]] = $page[0];
  43                         }
  44                 }
  45         }
  46
  47         public function execute() {
  48                 $this->run();
  49         }
  50
  51         public function executeGenerator( $resultPageSet ) {
  52                 $this->run( $resultPageSet );
  53         }
  54
  55         /**
  56          * @param ApiPageSet $resultPageSet
  57          */
  58         public function run( $resultPageSet = null ) {
  59                 $params = $this->extractRequestParams();
  60                 $result = $this->getResult();
  61
  62                 /** @var $qp QueryPage */
  63                 $qp = new $this->qpMap[$params['page']]();
  64                 if ( !$qp->userCanExecute( $this->getUser() ) ) {
  65                         $this->dieUsageMsg( 'specialpage-cantexecute' );
  66                 }
  67
  68                 $r = array( 'name' => $params['page'] );
  69                 if ( $qp->isCached() ) {
  70                         if ( !$qp->isCacheable() ) {
  71                                 $r['disabled'] = '';
  72                         } else {
  73                                 $r['cached'] = '';
  74                                 $ts = $qp->getCachedTimestamp();
  75                                 if ( $ts ) {
  76                                         $r['cachedtimestamp'] = wfTimestamp( TS_ISO_8601, $ts );
  77                                 }
  78                                 $r['maxresults'] = $this->getConfig()->get( 'QueryCacheLimit' );
  79                         }
  80                 }
  81                 $result->addValue( array( 'query' ), $this->getModuleName(), $r );
  82
  83                 if ( $qp->isCached() && !$qp->isCacheable() ) {
  84                         // Disabled query page, don't run the query
  85                         return;
  86                 }
  87
  88                 $res = $qp->doQuery( $params['offset'], $params['limit'] + 1 );
  89                 $count = 0;
  90                 $titles = array();
  91                 foreach ( $res as $row ) {
  92                         if ( ++$count > $params['limit'] ) {
  93                                 // We've had enough
  94                                 $this->setContinueEnumParameter( 'offset', $params['offset'] + $params['limit'] );
  95                                 break;
  96                         }
  97
  98                         $title = Title::makeTitle( $row->namespace, $row->title );
  99                         if ( is_null( $resultPageSet ) ) {
 100                                 $data = array( 'value' => $row->value );
 101                                 if ( $qp->usesTimestamps() ) {
 102                                         $data['timestamp'] = wfTimestamp( TS_ISO_8601, $row->value );
 103                                 }
 104                                 self::addTitleInfo( $data, $title );
 105
 106                                 foreach ( $row as $field => $value ) {
 107                                         if ( !in_array( $field, array( 'namespace', 'title', 'value', 'qc_type' ) ) ) {
 108                                                 $data['databaseResult'][$field] = $value;
 109                                         }
 110                                 }
 111
 112                                 $fit = $result->addValue( array( 'query', $this->getModuleName(), 'results' ), null, $data );
 113                                 if ( !$fit ) {
 114                                         $this->setContinueEnumParameter( 'offset', $params['offset'] + $count - 1 );
 115                                         break;
 116                                 }
 117                         } else {
 118                                 $titles[] = $title;
 119                         }
 120                 }
 121                 if ( is_null( $resultPageSet ) ) {
 122                         $result->setIndexedTagName_internal(
 123                                 array( 'query', $this->getModuleName(), 'results' ),
 124                                 'page'
 125                         );
 126                 } else {
 127                         $resultPageSet->populateFromTitles( $titles );
 128                 }
 129         }
 130
 131         public function getCacheMode( $params ) {
 132                 /** @var $qp QueryPage */
 133                 $qp = new $this->qpMap[$params['page']]();
 134                 if ( $qp->getRestriction() != '' ) {
 135                         return 'private';
 136                 }
 137
 138                 return 'public';
 139         }
 140
 141         public function getAllowedParams() {
 142                 return array(
 143                         'page' => array(
 144                                 ApiBase::PARAM_TYPE => array_keys( $this->qpMap ),
 145                                 ApiBase::PARAM_REQUIRED => true
 146                         ),
 147                         'offset' => array(
 148                                 ApiBase::PARAM_DFLT => 0,
 149                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 150                         ),
 151                         'limit' => array(
 152                                 ApiBase::PARAM_DFLT => 10,
 153                                 ApiBase::PARAM_TYPE => 'limit',
 154                                 ApiBase::PARAM_MIN => 1,
 155                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 156                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 157                         ),
 158                 );
 159         }
 160
 161         protected function getExamplesMessages() {
 162                 return array(
 163                         'action=query&list=querypage&qppage=Ancientpages'
 164                                 => 'apihelp-query+querypage-example-ancientpages',
 165                 );
 166         }
 167
 168         public function getHelpUrls() {
 169                 return 'https://www.mediawiki.org/wiki/API:Querypage';
 170         }
 171 }