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( $query, $moduleName ) {
  36                 parent::__construct( $query, $moduleName, 'qp' );
  37                 // We need to do this to make sure $wgQueryPages is set up
  38                 // This SUCKS
  39                 global $IP;
  40                 require_once "$IP/includes/QueryPage.php";
  41
  42                 // Build mapping from special page names to QueryPage classes
  43                 global $wgQueryPages, $wgAPIUselessQueryPages;
  44                 $this->qpMap = array();
  45                 foreach ( $wgQueryPages as $page ) {
  46                         if ( !in_array( $page[1], $wgAPIUselessQueryPages ) ) {
  47                                 $this->qpMap[$page[1]] = $page[0];
  48                         }
  49                 }
  50         }
  51
  52         public function execute() {
  53                 $this->run();
  54         }
  55
  56         public function executeGenerator( $resultPageSet ) {
  57                 $this->run( $resultPageSet );
  58         }
  59
  60         /**
  61          * @param $resultPageSet ApiPageSet
  62          */
  63         public function run( $resultPageSet = null ) {
  64                 global $wgQueryCacheLimit;
  65
  66                 $params = $this->extractRequestParams();
  67                 $result = $this->getResult();
  68
  69                 /** @var $qp QueryPage */
  70                 $qp = new $this->qpMap[$params['page']]();
  71                 if ( !$qp->userCanExecute( $this->getUser() ) ) {
  72                         $this->dieUsageMsg( 'specialpage-cantexecute' );
  73                 }
  74
  75                 $r = array( 'name' => $params['page'] );
  76                 if ( $qp->isCached() ) {
  77                         if ( !$qp->isCacheable() ) {
  78                                 $r['disabled'] = '';
  79                         } else {
  80                                 $r['cached'] = '';
  81                                 $ts = $qp->getCachedTimestamp();
  82                                 if ( $ts ) {
  83                                         $r['cachedtimestamp'] = wfTimestamp( TS_ISO_8601, $ts );
  84                                 }
  85                                 $r['maxresults'] = $wgQueryCacheLimit;
  86                         }
  87                 }
  88                 $result->addValue( array( 'query' ), $this->getModuleName(), $r );
  89
  90                 if ( $qp->isCached() && !$qp->isCacheable() ) {
  91                         // Disabled query page, don't run the query
  92                         return;
  93                 }
  94
  95                 $res = $qp->doQuery( $params['offset'], $params['limit'] + 1 );
  96                 $count = 0;
  97                 $titles = array();
  98                 foreach ( $res as $row ) {
  99                         if ( ++$count > $params['limit'] ) {
 100                                 // We've had enough
 101                                 $this->setContinueEnumParameter( 'offset', $params['offset'] + $params['limit'] );
 102                                 break;
 103                         }
 104
 105                         $title = Title::makeTitle( $row->namespace, $row->title );
 106                         if ( is_null( $resultPageSet ) ) {
 107                                 $data = array( 'value' => $row->value );
 108                                 if ( $qp->usesTimestamps() ) {
 109                                         $data['timestamp'] = wfTimestamp( TS_ISO_8601, $row->value );
 110                                 }
 111                                 self::addTitleInfo( $data, $title );
 112
 113                                 foreach ( $row as $field => $value ) {
 114                                         if ( !in_array( $field, array( 'namespace', 'title', 'value', 'qc_type' ) ) ) {
 115                                                 $data['databaseResult'][$field] = $value;
 116                                         }
 117                                 }
 118
 119                                 $fit = $result->addValue( array( 'query', $this->getModuleName(), 'results' ), null, $data );
 120                                 if ( !$fit ) {
 121                                         $this->setContinueEnumParameter( 'offset', $params['offset'] + $count - 1 );
 122                                         break;
 123                                 }
 124                         } else {
 125                                 $titles[] = $title;
 126                         }
 127                 }
 128                 if ( is_null( $resultPageSet ) ) {
 129                         $result->setIndexedTagName_internal( array( 'query', $this->getModuleName(), 'results' ), 'page' );
 130                 } else {
 131                         $resultPageSet->populateFromTitles( $titles );
 132                 }
 133         }
 134
 135         public function getCacheMode( $params ) {
 136                 /** @var $qp QueryPage */
 137                 $qp = new $this->qpMap[$params['page']]();
 138                 if ( $qp->getRestriction() != '' ) {
 139                         return 'private';
 140                 }
 141                 return 'public';
 142         }
 143
 144         public function getAllowedParams() {
 145                 return array(
 146                         'page' => array(
 147                                 ApiBase::PARAM_TYPE => array_keys( $this->qpMap ),
 148                                 ApiBase::PARAM_REQUIRED => true
 149                         ),
 150                         'offset' => 0,
 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         public function getParamDescription() {
 162                 return array(
 163                         'page' => 'The name of the special page. Note, this is case sensitive',
 164                         'offset' => 'When more results are available, use this to continue',
 165                         'limit' => 'Number of results to return',
 166                 );
 167         }
 168
 169         public function getResultProperties() {
 170                 return array(
 171                         ApiBase::PROP_ROOT => array(
 172                                 'name' => array(
 173                                         ApiBase::PROP_TYPE => 'string',
 174                                         ApiBase::PROP_NULLABLE => false
 175                                 ),
 176                                 'disabled' => array(
 177                                         ApiBase::PROP_TYPE => 'boolean',
 178                                         ApiBase::PROP_NULLABLE => false
 179                                 ),
 180                                 'cached' => array(
 181                                         ApiBase::PROP_TYPE => 'boolean',
 182                                         ApiBase::PROP_NULLABLE => false
 183                                 ),
 184                                 'cachedtimestamp' => array(
 185                                         ApiBase::PROP_TYPE => 'timestamp',
 186                                         ApiBase::PROP_NULLABLE => true
 187                                 )
 188                         ),
 189                         '' => array(
 190                                 'value' => 'string',
 191                                 'timestamp' => array(
 192                                         ApiBase::PROP_TYPE => 'timestamp',
 193                                         ApiBase::PROP_NULLABLE => true
 194                                 ),
 195                                 'ns' => 'namespace',
 196                                 'title' => 'string'
 197                         )
 198                 );
 199         }
 200
 201         public function getDescription() {
 202                 return 'Get a list provided by a QueryPage-based special page';
 203         }
 204
 205         public function getPossibleErrors() {
 206                 return array_merge( parent::getPossibleErrors(), array(
 207                         array( 'specialpage-cantexecute' )
 208                 ) );
 209         }
 210
 211         public function getExamples() {
 212                 return array(
 213                         'api.php?action=query&list=querypage&qppage=Ancientpages'
 214                 );
 215         }
 216
 217         public function getHelpUrls() {
 218                 return 'https://www.mediawiki.org/wiki/API:Querypage';
 219         }
 220 }