includes/api/ApiOpenSearch.php

   1 <?php
   2 /**
   3  * Created on Oct 13, 2006
   4  *
   5  * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  */
  24
  25 /**
  26  * @ingroup API
  27  */
  28 class ApiOpenSearch extends ApiBase {
  29
  30         /**
  31          * Override built-in handling of format parameter.
  32          * Only JSON is supported.
  33          *
  34          * @return ApiFormatBase
  35          */
  36         public function getCustomPrinter() {
  37                 $params = $this->extractRequestParams();
  38                 $format = $params['format'];
  39                 $allowed = array( 'json', 'jsonfm' );
  40                 if ( in_array( $format, $allowed ) ) {
  41                         return $this->getMain()->createPrinterByName( $format );
  42                 }
  43
  44                 return $this->getMain()->createPrinterByName( $allowed[0] );
  45         }
  46
  47         public function execute() {
  48                 global $wgEnableOpenSearchSuggest, $wgSearchSuggestCacheExpiry;
  49                 $params = $this->extractRequestParams();
  50                 $search = $params['search'];
  51                 $limit = $params['limit'];
  52                 $namespaces = $params['namespace'];
  53                 $suggest = $params['suggest'];
  54
  55                 // Some script that was loaded regardless of wgEnableOpenSearchSuggest, likely cached.
  56                 if ( $suggest && !$wgEnableOpenSearchSuggest ) {
  57                         $searches = array();
  58                 } else {
  59                         // Open search results may be stored for a very long time
  60                         $this->getMain()->setCacheMaxAge( $wgSearchSuggestCacheExpiry );
  61                         $this->getMain()->setCacheMode( 'public' );
  62
  63                         $searches = PrefixSearch::titleSearch( $search, $limit,
  64                                 $namespaces );
  65
  66                         // if the content language has variants, try to retrieve fallback results
  67                         $fallbackLimit = $limit - count( $searches );
  68                         if ( $fallbackLimit > 0 ) {
  69                                 global $wgContLang;
  70
  71                                 $fallbackSearches = $wgContLang->autoConvertToAllVariants( $search );
  72                                 $fallbackSearches = array_diff( array_unique( $fallbackSearches ), array( $search ) );
  73
  74                                 foreach ( $fallbackSearches as $fbs ) {
  75                                         $fallbackSearchResult = PrefixSearch::titleSearch( $fbs, $fallbackLimit,
  76                                                 $namespaces );
  77                                         $searches = array_merge( $searches, $fallbackSearchResult );
  78                                         $fallbackLimit -= count( $fallbackSearchResult );
  79
  80                                         if ( $fallbackLimit == 0 ) {
  81                                                 break;
  82                                         }
  83                                 }
  84                         }
  85                 }
  86                 // Set top level elements
  87                 $result = $this->getResult();
  88                 $result->addValue( null, 0, $search );
  89                 $result->addValue( null, 1, $searches );
  90         }
  91
  92         public function getAllowedParams() {
  93                 global $wgOpenSearchDefaultLimit;
  94
  95                 return array(
  96                         'search' => null,
  97                         'limit' => array(
  98                                 ApiBase::PARAM_DFLT => $wgOpenSearchDefaultLimit,
  99                                 ApiBase::PARAM_TYPE => 'limit',
 100                                 ApiBase::PARAM_MIN => 1,
 101                                 ApiBase::PARAM_MAX => 100,
 102                                 ApiBase::PARAM_MAX2 => 100
 103                         ),
 104                         'namespace' => array(
 105                                 ApiBase::PARAM_DFLT => NS_MAIN,
 106                                 ApiBase::PARAM_TYPE => 'namespace',
 107                                 ApiBase::PARAM_ISMULTI => true
 108                         ),
 109                         'suggest' => false,
 110                         'format' => array(
 111                                 ApiBase::PARAM_DFLT => 'json',
 112                                 ApiBase::PARAM_TYPE => array( 'json', 'jsonfm' ),
 113                         )
 114                 );
 115         }
 116
 117         public function getParamDescription() {
 118                 return array(
 119                         'search' => 'Search string',
 120                         'limit' => 'Maximum amount of results to return',
 121                         'namespace' => 'Namespaces to search',
 122                         'suggest' => 'Do nothing if $wgEnableOpenSearchSuggest is false',
 123                         'format' => 'The format of the output',
 124                 );
 125         }
 126
 127         public function getDescription() {
 128                 return 'Search the wiki using the OpenSearch protocol.';
 129         }
 130
 131         public function getExamples() {
 132                 return array(
 133                         'api.php?action=opensearch&search=Te'
 134                 );
 135         }
 136
 137         public function getHelpUrls() {
 138                 return 'https://www.mediawiki.org/wiki/API:Opensearch';
 139         }
 140 }