includes/cache/GenderCache.php

   1 <?php
   2 /**
   3  * Caches user genders when needed to use correct namespace aliases.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @author Niklas Laxström
  22  * @ingroup Cache
  23  */
  24 use MediaWiki\MediaWikiServices;
  25
  26 /**
  27  * Caches user genders when needed to use correct namespace aliases.
  28  *
  29  * @since 1.18
  30  */
  31 class GenderCache {
  32         protected $cache = [];
  33         protected $default;
  34         protected $misses = 0;
  35         protected $missLimit = 1000;
  36
  37         /**
  38          * @deprecated in 1.28 see MediaWikiServices::getInstance()->getGenderCache()
  39          * @return GenderCache
  40          */
  41         public static function singleton() {
  42                 return MediaWikiServices::getInstance()->getGenderCache();
  43         }
  44
  45         /**
  46          * Returns the default gender option in this wiki.
  47          * @return string
  48          */
  49         protected function getDefault() {
  50                 if ( $this->default === null ) {
  51                         $this->default = User::getDefaultOption( 'gender' );
  52                 }
  53
  54                 return $this->default;
  55         }
  56
  57         /**
  58          * Returns the gender for given username.
  59          * @param string|User $username Username
  60          * @param string $caller The calling method
  61          * @return string
  62          */
  63         public function getGenderOf( $username, $caller = '' ) {
  64                 global $wgUser;
  65
  66                 if ( $username instanceof User ) {
  67                         $username = $username->getName();
  68                 }
  69
  70                 $username = self::normalizeUsername( $username );
  71                 if ( !isset( $this->cache[$username] ) ) {
  72                         if ( $this->misses >= $this->missLimit && $wgUser->getName() !== $username ) {
  73                                 if ( $this->misses === $this->missLimit ) {
  74                                         $this->misses++;
  75                                         wfDebug( __METHOD__ . ": too many misses, returning default onwards\n" );
  76                                 }
  77
  78                                 return $this->getDefault();
  79                         } else {
  80                                 $this->misses++;
  81                                 $this->doQuery( $username, $caller );
  82                         }
  83                 }
  84
  85                 /* Undefined if there is a valid username which for some reason doesn't
  86                  * exist in the database.
  87                  */
  88                 return isset( $this->cache[$username] ) ? $this->cache[$username] : $this->getDefault();
  89         }
  90
  91         /**
  92          * Wrapper for doQuery that processes raw LinkBatch data.
  93          *
  94          * @param array $data
  95          * @param string $caller
  96          */
  97         public function doLinkBatch( $data, $caller = '' ) {
  98                 $users = [];
  99                 foreach ( $data as $ns => $pagenames ) {
 100                         if ( !MWNamespace::hasGenderDistinction( $ns ) ) {
 101                                 continue;
 102                         }
 103                         foreach ( array_keys( $pagenames ) as $username ) {
 104                                 $users[$username] = true;
 105                         }
 106                 }
 107
 108                 $this->doQuery( array_keys( $users ), $caller );
 109         }
 110
 111         /**
 112          * Wrapper for doQuery that processes a title or string array.
 113          *
 114          * @since 1.20
 115          * @param array $titles Array of Title objects or strings
 116          * @param string $caller The calling method
 117          */
 118         public function doTitlesArray( $titles, $caller = '' ) {
 119                 $users = [];
 120                 foreach ( $titles as $title ) {
 121                         $titleObj = is_string( $title ) ? Title::newFromText( $title ) : $title;
 122                         if ( !$titleObj ) {
 123                                 continue;
 124                         }
 125                         if ( !MWNamespace::hasGenderDistinction( $titleObj->getNamespace() ) ) {
 126                                 continue;
 127                         }
 128                         $users[] = $titleObj->getText();
 129                 }
 130
 131                 $this->doQuery( $users, $caller );
 132         }
 133
 134         /**
 135          * Preloads genders for given list of users.
 136          * @param array|string $users Usernames
 137          * @param string $caller The calling method
 138          */
 139         public function doQuery( $users, $caller = '' ) {
 140                 $default = $this->getDefault();
 141
 142                 $usersToCheck = [];
 143                 foreach ( (array)$users as $value ) {
 144                         $name = self::normalizeUsername( $value );
 145                         // Skip users whose gender setting we already know
 146                         if ( !isset( $this->cache[$name] ) ) {
 147                                 // For existing users, this value will be overwritten by the correct value
 148                                 $this->cache[$name] = $default;
 149                                 // query only for valid names, which can be in the database
 150                                 if ( User::isValidUserName( $name ) ) {
 151                                         $usersToCheck[] = $name;
 152                                 }
 153                         }
 154                 }
 155
 156                 if ( count( $usersToCheck ) === 0 ) {
 157                         return;
 158                 }
 159
 160                 $dbr = wfGetDB( DB_SLAVE );
 161                 $table = [ 'user', 'user_properties' ];
 162                 $fields = [ 'user_name', 'up_value' ];
 163                 $conds = [ 'user_name' => $usersToCheck ];
 164                 $joins = [ 'user_properties' =>
 165                         [ 'LEFT JOIN', [ 'user_id = up_user', 'up_property' => 'gender' ] ] ];
 166
 167                 $comment = __METHOD__;
 168                 if ( strval( $caller ) !== '' ) {
 169                         $comment .= "/$caller";
 170                 }
 171                 $res = $dbr->select( $table, $fields, $conds, $comment, [], $joins );
 172
 173                 foreach ( $res as $row ) {
 174                         $this->cache[$row->user_name] = $row->up_value ? $row->up_value : $default;
 175                 }
 176         }
 177
 178         private static function normalizeUsername( $username ) {
 179                 // Strip off subpages
 180                 $indexSlash = strpos( $username, '/' );
 181                 if ( $indexSlash !== false ) {
 182                         $username = substr( $username, 0, $indexSlash );
 183                 }
 184
 185                 // normalize underscore/spaces
 186                 return strtr( $username, '_', ' ' );
 187         }
 188 }