includes/api/ApiQueryIWBacklinks.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  * This gives links pointing to the given interwiki
  30  * @ingroup API
  31  */
  32 class ApiQueryIWBacklinks extends ApiQueryGeneratorBase {
  33
  34         public function __construct( ApiQuery $query, $moduleName ) {
  35                 parent::__construct( $query, $moduleName, 'iwbl' );
  36         }
  37
  38         public function execute() {
  39                 $this->run();
  40         }
  41
  42         public function executeGenerator( $resultPageSet ) {
  43                 $this->run( $resultPageSet );
  44         }
  45
  46         /**
  47          * @param ApiPageSet $resultPageSet
  48          * @return void
  49          */
  50         public function run( $resultPageSet = null ) {
  51                 $params = $this->extractRequestParams();
  52
  53                 if ( isset( $params['title'] ) && !isset( $params['prefix'] ) ) {
  54                         $this->dieUsageMsg( [ 'missingparam', 'prefix' ] );
  55                 }
  56
  57                 if ( !is_null( $params['continue'] ) ) {
  58                         $cont = explode( '|', $params['continue'] );
  59                         $this->dieContinueUsageIf( count( $cont ) != 3 );
  60
  61                         $db = $this->getDB();
  62                         $op = $params['dir'] == 'descending' ? '<' : '>';
  63                         $prefix = $db->addQuotes( $cont[0] );
  64                         $title = $db->addQuotes( $cont[1] );
  65                         $from = intval( $cont[2] );
  66                         $this->addWhere(
  67                                 "iwl_prefix $op $prefix OR " .
  68                                 "(iwl_prefix = $prefix AND " .
  69                                 "(iwl_title $op $title OR " .
  70                                 "(iwl_title = $title AND " .
  71                                 "iwl_from $op= $from)))"
  72                         );
  73                 }
  74
  75                 $prop = array_flip( $params['prop'] );
  76                 $iwprefix = isset( $prop['iwprefix'] );
  77                 $iwtitle = isset( $prop['iwtitle'] );
  78
  79                 $this->addTables( [ 'iwlinks', 'page' ] );
  80                 $this->addWhere( 'iwl_from = page_id' );
  81
  82                 $this->addFields( [ 'page_id', 'page_title', 'page_namespace', 'page_is_redirect',
  83                         'iwl_from', 'iwl_prefix', 'iwl_title' ] );
  84
  85                 $sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
  86                 if ( isset( $params['prefix'] ) ) {
  87                         $this->addWhereFld( 'iwl_prefix', $params['prefix'] );
  88                         if ( isset( $params['title'] ) ) {
  89                                 $this->addWhereFld( 'iwl_title', $params['title'] );
  90                                 $this->addOption( 'ORDER BY', 'iwl_from' . $sort );
  91                         } else {
  92                                 $this->addOption( 'ORDER BY', [
  93                                         'iwl_title' . $sort,
  94                                         'iwl_from' . $sort
  95                                 ] );
  96                         }
  97                 } else {
  98                         $this->addOption( 'ORDER BY', [
  99                                 'iwl_prefix' . $sort,
 100                                 'iwl_title' . $sort,
 101                                 'iwl_from' . $sort
 102                         ] );
 103                 }
 104
 105                 $this->addOption( 'LIMIT', $params['limit'] + 1 );
 106
 107                 $res = $this->select( __METHOD__ );
 108
 109                 $pages = [];
 110
 111                 $count = 0;
 112                 $result = $this->getResult();
 113                 foreach ( $res as $row ) {
 114                         if ( ++$count > $params['limit'] ) {
 115                                 // We've reached the one extra which shows that there are
 116                                 // additional pages to be had. Stop here...
 117                                 // Continue string preserved in case the redirect query doesn't
 118                                 // pass the limit
 119                                 $this->setContinueEnumParameter(
 120                                         'continue',
 121                                         "{$row->iwl_prefix}|{$row->iwl_title}|{$row->iwl_from}"
 122                                 );
 123                                 break;
 124                         }
 125
 126                         if ( !is_null( $resultPageSet ) ) {
 127                                 $pages[] = Title::newFromRow( $row );
 128                         } else {
 129                                 $entry = [ 'pageid' => $row->page_id ];
 130
 131                                 $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 132                                 ApiQueryBase::addTitleInfo( $entry, $title );
 133
 134                                 if ( $row->page_is_redirect ) {
 135                                         $entry['redirect'] = true;
 136                                 }
 137
 138                                 if ( $iwprefix ) {
 139                                         $entry['iwprefix'] = $row->iwl_prefix;
 140                                 }
 141
 142                                 if ( $iwtitle ) {
 143                                         $entry['iwtitle'] = $row->iwl_title;
 144                                 }
 145
 146                                 $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $entry );
 147                                 if ( !$fit ) {
 148                                         $this->setContinueEnumParameter(
 149                                                 'continue',
 150                                                 "{$row->iwl_prefix}|{$row->iwl_title}|{$row->iwl_from}"
 151                                         );
 152                                         break;
 153                                 }
 154                         }
 155                 }
 156
 157                 if ( is_null( $resultPageSet ) ) {
 158                         $result->addIndexedTagName( [ 'query', $this->getModuleName() ], 'iw' );
 159                 } else {
 160                         $resultPageSet->populateFromTitles( $pages );
 161                 }
 162         }
 163
 164         public function getCacheMode( $params ) {
 165                 return 'public';
 166         }
 167
 168         public function getAllowedParams() {
 169                 return [
 170                         'prefix' => null,
 171                         'title' => null,
 172                         'continue' => [
 173                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 174                         ],
 175                         'limit' => [
 176                                 ApiBase::PARAM_DFLT => 10,
 177                                 ApiBase::PARAM_TYPE => 'limit',
 178                                 ApiBase::PARAM_MIN => 1,
 179                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 180                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 181                         ],
 182                         'prop' => [
 183                                 ApiBase::PARAM_ISMULTI => true,
 184                                 ApiBase::PARAM_DFLT => '',
 185                                 ApiBase::PARAM_TYPE => [
 186                                         'iwprefix',
 187                                         'iwtitle',
 188                                 ],
 189                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
 190                         ],
 191                         'dir' => [
 192                                 ApiBase::PARAM_DFLT => 'ascending',
 193                                 ApiBase::PARAM_TYPE => [
 194                                         'ascending',
 195                                         'descending'
 196                                 ]
 197                         ],
 198                 ];
 199         }
 200
 201         protected function getExamplesMessages() {
 202                 return [
 203                         'action=query&list=iwbacklinks&iwbltitle=Test&iwblprefix=wikibooks'
 204                                 => 'apihelp-query+iwbacklinks-example-simple',
 205                         'action=query&generator=iwbacklinks&giwbltitle=Test&giwblprefix=wikibooks&prop=info'
 206                                 => 'apihelp-query+iwbacklinks-example-generator',
 207                 ];
 208         }
 209
 210         public function getHelpUrls() {
 211                 return 'https://www.mediawiki.org/wiki/API:Iwbacklinks';
 212         }
 213 }