includes/api/ApiQueryIWLinks.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.17+
   4  *
   5  * Created on May 14, 2010
   6  *
   7  * Copyright © 2010 Sam Reed
   8  * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  *
  25  * @file
  26  */
  27
  28 /**
  29  * A query module to list all interwiki links on a page
  30  *
  31  * @ingroup API
  32  */
  33 class ApiQueryIWLinks extends ApiQueryBase {
  34
  35         public function __construct( ApiQuery $query, $moduleName ) {
  36                 parent::__construct( $query, $moduleName, 'iw' );
  37         }
  38
  39         public function execute() {
  40                 if ( $this->getPageSet()->getGoodTitleCount() == 0 ) {
  41                         return;
  42                 }
  43
  44                 $params = $this->extractRequestParams();
  45                 $prop = array_flip( (array)$params['prop'] );
  46
  47                 if ( isset( $params['title'] ) && !isset( $params['prefix'] ) ) {
  48                         $this->dieWithError(
  49                                 [
  50                                         'apierror-invalidparammix-mustusewith',
  51                                         $this->encodeParamName( 'title' ),
  52                                         $this->encodeParamName( 'prefix' ),
  53                                 ],
  54                                 'invalidparammix'
  55                         );
  56                 }
  57
  58                 // Handle deprecated param
  59                 $this->requireMaxOneParameter( $params, 'url', 'prop' );
  60                 if ( $params['url'] ) {
  61                         $prop = [ 'url' => 1 ];
  62                 }
  63
  64                 $this->addFields( [
  65                         'iwl_from',
  66                         'iwl_prefix',
  67                         'iwl_title'
  68                 ] );
  69
  70                 $this->addTables( 'iwlinks' );
  71                 $this->addWhereFld( 'iwl_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
  72
  73                 if ( !is_null( $params['continue'] ) ) {
  74                         $cont = explode( '|', $params['continue'] );
  75                         $this->dieContinueUsageIf( count( $cont ) != 3 );
  76                         $op = $params['dir'] == 'descending' ? '<' : '>';
  77                         $db = $this->getDB();
  78                         $iwlfrom = intval( $cont[0] );
  79                         $iwlprefix = $db->addQuotes( $cont[1] );
  80                         $iwltitle = $db->addQuotes( $cont[2] );
  81                         $this->addWhere(
  82                                 "iwl_from $op $iwlfrom OR " .
  83                                 "(iwl_from = $iwlfrom AND " .
  84                                 "(iwl_prefix $op $iwlprefix OR " .
  85                                 "(iwl_prefix = $iwlprefix AND " .
  86                                 "iwl_title $op= $iwltitle)))"
  87                         );
  88                 }
  89
  90                 $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
  91                 if ( isset( $params['prefix'] ) ) {
  92                         $this->addWhereFld( 'iwl_prefix', $params['prefix'] );
  93                         if ( isset( $params['title'] ) ) {
  94                                 $this->addWhereFld( 'iwl_title', $params['title'] );
  95                                 $this->addOption( 'ORDER BY', 'iwl_from' . $sort );
  96                         } else {
  97                                 $this->addOption( 'ORDER BY', [
  98                                         'iwl_from' . $sort,
  99                                         'iwl_title' . $sort
 100                                 ] );
 101                         }
 102                 } else {
 103                         // Don't order by iwl_from if it's constant in the WHERE clause
 104                         if ( count( $this->getPageSet()->getGoodTitles() ) == 1 ) {
 105                                 $this->addOption( 'ORDER BY', 'iwl_prefix' . $sort );
 106                         } else {
 107                                 $this->addOption( 'ORDER BY', [
 108                                         'iwl_from' . $sort,
 109                                         'iwl_prefix' . $sort,
 110                                         'iwl_title' . $sort
 111                                 ] );
 112                         }
 113                 }
 114
 115                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
 116                 $res = $this->select( __METHOD__ );
 117
 118                 $count = 0;
 119                 foreach ( $res as $row ) {
 120                         if ( ++$count > $params['limit'] ) {
 121                                 // We've reached the one extra which shows that
 122                                 // there are additional pages to be had. Stop here...
 123                                 $this->setContinueEnumParameter(
 124                                         'continue',
 125                                         "{$row->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}"
 126                                 );
 127                                 break;
 128                         }
 129                         $entry = [ 'prefix' => $row->iwl_prefix ];
 130
 131                         if ( isset( $prop['url'] ) ) {
 132                                 $title = Title::newFromText( "{$row->iwl_prefix}:{$row->iwl_title}" );
 133                                 if ( $title ) {
 134                                         $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 135                                 }
 136                         }
 137
 138                         ApiResult::setContentValue( $entry, 'title', $row->iwl_title );
 139                         $fit = $this->addPageSubItem( $row->iwl_from, $entry );
 140                         if ( !$fit ) {
 141                                 $this->setContinueEnumParameter(
 142                                         'continue',
 143                                         "{$row->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}"
 144                                 );
 145                                 break;
 146                         }
 147                 }
 148         }
 149
 150         public function getCacheMode( $params ) {
 151                 return 'public';
 152         }
 153
 154         public function getAllowedParams() {
 155                 return [
 156                         'prop' => [
 157                                 ApiBase::PARAM_ISMULTI => true,
 158                                 ApiBase::PARAM_TYPE => [
 159                                         'url',
 160                                 ],
 161                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
 162                         ],
 163                         'prefix' => null,
 164                         'title' => null,
 165                         'dir' => [
 166                                 ApiBase::PARAM_DFLT => 'ascending',
 167                                 ApiBase::PARAM_TYPE => [
 168                                         'ascending',
 169                                         'descending'
 170                                 ]
 171                         ],
 172                         'limit' => [
 173                                 ApiBase::PARAM_DFLT => 10,
 174                                 ApiBase::PARAM_TYPE => 'limit',
 175                                 ApiBase::PARAM_MIN => 1,
 176                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 177                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 178                         ],
 179                         'continue' => [
 180                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 181                         ],
 182                         'url' => [
 183                                 ApiBase::PARAM_DFLT => false,
 184                                 ApiBase::PARAM_DEPRECATED => true,
 185                         ],
 186                 ];
 187         }
 188
 189         protected function getExamplesMessages() {
 190                 return [
 191                         'action=query&prop=iwlinks&titles=Main%20Page'
 192                                 => 'apihelp-query+iwlinks-example-simple',
 193                 ];
 194         }
 195
 196         public function getHelpUrls() {
 197                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Iwlinks';
 198         }
 199 }