includes/api/ApiQueryExtLinksUsage.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on July 7, 2007
   6  *
   7  * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * @ingroup API
  29  */
  30 class ApiQueryExtLinksUsage extends ApiQueryGeneratorBase {
  31
  32         public function __construct( ApiQuery $query, $moduleName ) {
  33                 parent::__construct( $query, $moduleName, 'eu' );
  34         }
  35
  36         public function execute() {
  37                 $this->run();
  38         }
  39
  40         public function getCacheMode( $params ) {
  41                 return 'public';
  42         }
  43
  44         public function executeGenerator( $resultPageSet ) {
  45                 $this->run( $resultPageSet );
  46         }
  47
  48         /**
  49          * @param ApiPageSet $resultPageSet
  50          * @return void
  51          */
  52         private function run( $resultPageSet = null ) {
  53                 $params = $this->extractRequestParams();
  54
  55                 $query = $params['query'];
  56                 $protocol = self::getProtocolPrefix( $params['protocol'] );
  57
  58                 $this->addTables( [ 'page', 'externallinks' ] ); // must be in this order for 'USE INDEX'
  59                 $this->addOption( 'USE INDEX', 'el_index' );
  60                 $this->addWhere( 'page_id=el_from' );
  61
  62                 $miser_ns = [];
  63                 if ( $this->getConfig()->get( 'MiserMode' ) ) {
  64                         $miser_ns = $params['namespace'];
  65                 } else {
  66                         $this->addWhereFld( 'page_namespace', $params['namespace'] );
  67                 }
  68
  69                 // Normalize query to match the normalization applied for the externallinks table
  70                 $query = Parser::normalizeLinkUrl( $query );
  71
  72                 $whereQuery = $this->prepareUrlQuerySearchString( $query, $protocol );
  73
  74                 if ( $whereQuery !== null ) {
  75                         $this->addWhere( $whereQuery );
  76                 }
  77
  78                 $prop = array_flip( $params['prop'] );
  79                 $fld_ids = isset( $prop['ids'] );
  80                 $fld_title = isset( $prop['title'] );
  81                 $fld_url = isset( $prop['url'] );
  82
  83                 if ( is_null( $resultPageSet ) ) {
  84                         $this->addFields( [
  85                                 'page_id',
  86                                 'page_namespace',
  87                                 'page_title'
  88                         ] );
  89                         $this->addFieldsIf( 'el_to', $fld_url );
  90                 } else {
  91                         $this->addFields( $resultPageSet->getPageTableFields() );
  92                 }
  93
  94                 $limit = $params['limit'];
  95                 $offset = $params['offset'];
  96                 $this->addOption( 'LIMIT', $limit + 1 );
  97                 if ( isset( $offset ) ) {
  98                         $this->addOption( 'OFFSET', $offset );
  99                 }
 100
 101                 $res = $this->select( __METHOD__ );
 102
 103                 $result = $this->getResult();
 104                 $count = 0;
 105                 foreach ( $res as $row ) {
 106                         if ( ++$count > $limit ) {
 107                                 // We've reached the one extra which shows that there are
 108                                 // additional pages to be had. Stop here...
 109                                 $this->setContinueEnumParameter( 'offset', $offset + $limit );
 110                                 break;
 111                         }
 112
 113                         if ( count( $miser_ns ) && !in_array( $row->page_namespace, $miser_ns ) ) {
 114                                 continue;
 115                         }
 116
 117                         if ( is_null( $resultPageSet ) ) {
 118                                 $vals = [
 119                                         ApiResult::META_TYPE => 'assoc',
 120                                 ];
 121                                 if ( $fld_ids ) {
 122                                         $vals['pageid'] = intval( $row->page_id );
 123                                 }
 124                                 if ( $fld_title ) {
 125                                         $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 126                                         ApiQueryBase::addTitleInfo( $vals, $title );
 127                                 }
 128                                 if ( $fld_url ) {
 129                                         $to = $row->el_to;
 130                                         // expand protocol-relative urls
 131                                         if ( $params['expandurl'] ) {
 132                                                 $to = wfExpandUrl( $to, PROTO_CANONICAL );
 133                                         }
 134                                         $vals['url'] = $to;
 135                                 }
 136                                 $fit = $result->addValue( [ 'query', $this->getModuleName() ], null, $vals );
 137                                 if ( !$fit ) {
 138                                         $this->setContinueEnumParameter( 'offset', $offset + $count - 1 );
 139                                         break;
 140                                 }
 141                         } else {
 142                                 $resultPageSet->processDbRow( $row );
 143                         }
 144                 }
 145
 146                 if ( is_null( $resultPageSet ) ) {
 147                         $result->addIndexedTagName( [ 'query', $this->getModuleName() ],
 148                                 $this->getModulePrefix() );
 149                 }
 150         }
 151
 152         public function getAllowedParams() {
 153                 $ret = [
 154                         'prop' => [
 155                                 ApiBase::PARAM_ISMULTI => true,
 156                                 ApiBase::PARAM_DFLT => 'ids|title|url',
 157                                 ApiBase::PARAM_TYPE => [
 158                                         'ids',
 159                                         'title',
 160                                         'url'
 161                                 ],
 162                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
 163                         ],
 164                         'offset' => [
 165                                 ApiBase::PARAM_TYPE => 'integer',
 166                                 ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
 167                         ],
 168                         'protocol' => [
 169                                 ApiBase::PARAM_TYPE => self::prepareProtocols(),
 170                                 ApiBase::PARAM_DFLT => '',
 171                         ],
 172                         'query' => null,
 173                         'namespace' => [
 174                                 ApiBase::PARAM_ISMULTI => true,
 175                                 ApiBase::PARAM_TYPE => 'namespace'
 176                         ],
 177                         'limit' => [
 178                                 ApiBase::PARAM_DFLT => 10,
 179                                 ApiBase::PARAM_TYPE => 'limit',
 180                                 ApiBase::PARAM_MIN => 1,
 181                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 182                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 183                         ],
 184                         'expandurl' => false,
 185                 ];
 186
 187                 if ( $this->getConfig()->get( 'MiserMode' ) ) {
 188                         $ret['namespace'][ApiBase::PARAM_HELP_MSG_APPEND] = [
 189                                 'api-help-param-limited-in-miser-mode',
 190                         ];
 191                 }
 192
 193                 return $ret;
 194         }
 195
 196         public static function prepareProtocols() {
 197                 global $wgUrlProtocols;
 198                 $protocols = [ '' ];
 199                 foreach ( $wgUrlProtocols as $p ) {
 200                         if ( $p !== '//' ) {
 201                                 $protocols[] = substr( $p, 0, strpos( $p, ':' ) );
 202                         }
 203                 }
 204
 205                 return $protocols;
 206         }
 207
 208         public static function getProtocolPrefix( $protocol ) {
 209                 // Find the right prefix
 210                 global $wgUrlProtocols;
 211                 if ( $protocol && !in_array( $protocol, $wgUrlProtocols ) ) {
 212                         foreach ( $wgUrlProtocols as $p ) {
 213                                 if ( substr( $p, 0, strlen( $protocol ) ) === $protocol ) {
 214                                         $protocol = $p;
 215                                         break;
 216                                 }
 217                         }
 218
 219                         return $protocol;
 220                 } else {
 221                         return null;
 222                 }
 223         }
 224
 225         protected function getExamplesMessages() {
 226                 return [
 227                         'action=query&list=exturlusage&euquery=www.mediawiki.org'
 228                                 => 'apihelp-query+exturlusage-example-simple',
 229                 ];
 230         }
 231
 232         public function getHelpUrls() {
 233                 return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Exturlusage';
 234         }
 235 }