includes/api/ApiQueryPrefixSearch.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @since 1.23
  20  */
  21
  22 /**
  23  * @ingroup API
  24  */
  25 class ApiQueryPrefixSearch extends ApiQueryGeneratorBase {
  26         public function __construct( $query, $moduleName ) {
  27                 parent::__construct( $query, $moduleName, 'ps' );
  28         }
  29
  30         public function execute() {
  31                 $this->run();
  32         }
  33
  34         public function executeGenerator( $resultPageSet ) {
  35                 $this->run( $resultPageSet );
  36         }
  37
  38         /**
  39          * @param ApiPageSet $resultPageSet
  40          */
  41         private function run( $resultPageSet = null ) {
  42                 $params = $this->extractRequestParams();
  43                 $search = $params['search'];
  44                 $limit = $params['limit'];
  45                 $namespaces = $params['namespace'];
  46                 $offset = $params['offset'];
  47
  48                 $searchEngine = SearchEngine::create();
  49                 $searchEngine->setLimitOffset( $limit + 1, $offset );
  50                 $searchEngine->setNamespaces( $namespaces );
  51                 $titles = $searchEngine->extractTitles( $searchEngine->completionSearchWithVariants( $search ) );
  52
  53                 if ( $resultPageSet ) {
  54                         $resultPageSet->setRedirectMergePolicy( function( array $current, array $new ) {
  55                                 if ( !isset( $current['index'] ) || $new['index'] < $current['index'] ) {
  56                                         $current['index'] = $new['index'];
  57                                 }
  58                                 return $current;
  59                         } );
  60                         if ( count( $titles ) > $limit ) {
  61                                 $this->setContinueEnumParameter( 'offset', $offset + $params['limit'] );
  62                                 array_pop( $titles );
  63                         }
  64                         $resultPageSet->populateFromTitles( $titles );
  65                         foreach ( $titles as $index => $title ) {
  66                                 $resultPageSet->setGeneratorData( $title, array( 'index' => $index + $offset + 1 ) );
  67                         }
  68                 } else {
  69                         $result = $this->getResult();
  70                         $count = 0;
  71                         foreach ( $titles as $title ) {
  72                                 if ( ++$count > $limit ) {
  73                                         $this->setContinueEnumParameter( 'offset', $offset + $params['limit'] );
  74                                         break;
  75                                 }
  76                                 $vals = array(
  77                                         'ns' => intval( $title->getNamespace() ),
  78                                         'title' => $title->getPrefixedText(),
  79                                 );
  80                                 if ( $title->isSpecialPage() ) {
  81                                         $vals['special'] = true;
  82                                 } else {
  83                                         $vals['pageid'] = intval( $title->getArticleId() );
  84                                 }
  85                                 $fit = $result->addValue( array( 'query', $this->getModuleName() ), null, $vals );
  86                                 if ( !$fit ) {
  87                                         $this->setContinueEnumParameter( 'offset', $offset + $count - 1 );
  88                                         break;
  89                                 }
  90                         }
  91                         $result->addIndexedTagName(
  92                                 array( 'query', $this->getModuleName() ), $this->getModulePrefix()
  93                         );
  94                 }
  95         }
  96
  97         public function getCacheMode( $params ) {
  98                 return 'public';
  99         }
 100
 101         public function getAllowedParams() {
 102                         return array(
 103                                 'search' => array(
 104                                         ApiBase::PARAM_TYPE => 'string',
 105                                         ApiBase::PARAM_REQUIRED => true,
 106                                 ),
 107                                 'namespace' => array(
 108                                         ApiBase::PARAM_DFLT => NS_MAIN,
 109                                         ApiBase::PARAM_TYPE => 'namespace',
 110                                         ApiBase::PARAM_ISMULTI => true,
 111                                 ),
 112                                 'limit' => array(
 113                                         ApiBase::PARAM_DFLT => 10,
 114                                         ApiBase::PARAM_TYPE => 'limit',
 115                                         ApiBase::PARAM_MIN => 1,
 116                                         // Non-standard value for compatibility with action=opensearch
 117                                         ApiBase::PARAM_MAX => 100,
 118                                         ApiBase::PARAM_MAX2 => 200,
 119                                 ),
 120                                 'offset' => array(
 121                                         ApiBase::PARAM_DFLT => 0,
 122                                         ApiBase::PARAM_TYPE => 'integer',
 123                                 ),
 124                         );
 125         }
 126
 127         protected function getExamplesMessages() {
 128                 return array(
 129                         'action=query&list=prefixsearch&pssearch=meaning'
 130                                 => 'apihelp-query+prefixsearch-example-simple',
 131                 );
 132         }
 133
 134         public function getHelpUrls() {
 135                 return 'https://www.mediawiki.org/wiki/API:Prefixsearch';
 136         }
 137 }