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->dieUsageMsg( array( 'missingparam', 'prefix' ) );
  49                 }
  50
  51                 // Handle deprecated param
  52                 $this->requireMaxOneParameter( $params, 'url', 'prop' );
  53                 if ( $params['url'] ) {
  54                         $this->logFeatureUsage( 'prop=iwlinks&iwurl' );
  55                         $prop = array( 'url' => 1 );
  56                 }
  57
  58                 $this->addFields( array(
  59                         'iwl_from',
  60                         'iwl_prefix',
  61                         'iwl_title'
  62                 ) );
  63
  64                 $this->addTables( 'iwlinks' );
  65                 $this->addWhereFld( 'iwl_from', array_keys( $this->getPageSet()->getGoodTitles() ) );
  66
  67                 if ( !is_null( $params['continue'] ) ) {
  68                         $cont = explode( '|', $params['continue'] );
  69                         $this->dieContinueUsageIf( count( $cont ) != 3 );
  70                         $op = $params['dir'] == 'descending' ? '<' : '>';
  71                         $db = $this->getDB();
  72                         $iwlfrom = intval( $cont[0] );
  73                         $iwlprefix = $db->addQuotes( $cont[1] );
  74                         $iwltitle = $db->addQuotes( $cont[2] );
  75                         $this->addWhere(
  76                                 "iwl_from $op $iwlfrom OR " .
  77                                 "(iwl_from = $iwlfrom AND " .
  78                                 "(iwl_prefix $op $iwlprefix OR " .
  79                                 "(iwl_prefix = $iwlprefix AND " .
  80                                 "iwl_title $op= $iwltitle)))"
  81                         );
  82                 }
  83
  84                 $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
  85                 if ( isset( $params['prefix'] ) ) {
  86                         $this->addWhereFld( 'iwl_prefix', $params['prefix'] );
  87                         if ( isset( $params['title'] ) ) {
  88                                 $this->addWhereFld( 'iwl_title', $params['title'] );
  89                                 $this->addOption( 'ORDER BY', 'iwl_from' . $sort );
  90                         } else {
  91                                 $this->addOption( 'ORDER BY', array(
  92                                         'iwl_from' . $sort,
  93                                         'iwl_title' . $sort
  94                                 ) );
  95                         }
  96                 } else {
  97                         // Don't order by iwl_from if it's constant in the WHERE clause
  98                         if ( count( $this->getPageSet()->getGoodTitles() ) == 1 ) {
  99                                 $this->addOption( 'ORDER BY', 'iwl_prefix' . $sort );
 100                         } else {
 101                                 $this->addOption( 'ORDER BY', array(
 102                                         'iwl_from' . $sort,
 103                                         'iwl_prefix' . $sort,
 104                                         'iwl_title' . $sort
 105                                 ) );
 106                         }
 107                 }
 108
 109                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
 110                 $res = $this->select( __METHOD__ );
 111
 112                 $count = 0;
 113                 foreach ( $res as $row ) {
 114                         if ( ++$count > $params['limit'] ) {
 115                                 // We've reached the one extra which shows that
 116                                 // there are additional pages to be had. Stop here...
 117                                 $this->setContinueEnumParameter(
 118                                         'continue',
 119                                         "{$row->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}"
 120                                 );
 121                                 break;
 122                         }
 123                         $entry = array( 'prefix' => $row->iwl_prefix );
 124
 125                         if ( isset( $prop['url'] ) ) {
 126                                 $title = Title::newFromText( "{$row->iwl_prefix}:{$row->iwl_title}" );
 127                                 if ( $title ) {
 128                                         $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 129                                 }
 130                         }
 131
 132                         ApiResult::setContent( $entry, $row->iwl_title );
 133                         $fit = $this->addPageSubItem( $row->iwl_from, $entry );
 134                         if ( !$fit ) {
 135                                 $this->setContinueEnumParameter(
 136                                         'continue',
 137                                         "{$row->iwl_from}|{$row->iwl_prefix}|{$row->iwl_title}"
 138                                 );
 139                                 break;
 140                         }
 141                 }
 142         }
 143
 144         public function getCacheMode( $params ) {
 145                 return 'public';
 146         }
 147
 148         public function getAllowedParams() {
 149                 return array(
 150                         'prop' => array(
 151                                 ApiBase::PARAM_ISMULTI => true,
 152                                 ApiBase::PARAM_TYPE => array(
 153                                         'url',
 154                                 )
 155                         ),
 156                         'prefix' => null,
 157                         'title' => null,
 158                         'dir' => array(
 159                                 ApiBase::PARAM_DFLT => 'ascending',
 160                                 ApiBase::PARAM_TYPE => array(
 161                                         'ascending',
 162                                         'descending'
 163                                 )
 164                         ),
 165                         'limit' => array(
 166                                 ApiBase::PARAM_DFLT => 10,
 167                                 ApiBase::PARAM_TYPE => 'limit',
 168                                 ApiBase::PARAM_MIN => 1,
 169                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 170                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 171                         ),
 172                         'continue' => array(
 173                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 174                         ),
 175                         'url' => array(
 176                                 ApiBase::PARAM_DFLT => false,
 177                                 ApiBase::PARAM_DEPRECATED => true,
 178                         ),
 179                 );
 180         }
 181
 182         protected function getExamplesMessages() {
 183                 return array(
 184                         'action=query&prop=iwlinks&titles=Main%20Page'
 185                                 => 'apihelp-query+iwlinks-example-simple',
 186                 );
 187         }
 188
 189         public function getHelpUrls() {
 190                 return 'https://www.mediawiki.org/wiki/API:Iwlinks';
 191         }
 192 }