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<?php
/**
* Caches user genders when needed to use correct namespace aliases.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @author Niklas Laxström
* @ingroup Cache
*/
/**
* Caches user genders when needed to use correct namespace aliases.
*
* @since 1.18
*/
class GenderCache {
protected $cache = array();
protected $default;
protected $misses = 0;
protected $missLimit = 1000;
/**
* @return GenderCache
*/
public static function singleton() {
static $that = null;
if ( $that === null ) {
$that = new self();
}
return $that;
}
protected function __construct() {}
/**
* Returns the default gender option in this wiki.
* @return String
*/
protected function getDefault() {
if ( $this->default === null ) {
$this->default = User::getDefaultOption( 'gender' );
}
return $this->default;
}
/**
* Returns the gender for given username.
* @param $username String or User: username
* @param $caller String: the calling method
* @return String
*/
public function getGenderOf( $username, $caller = '' ) {
global $wgUser;
if( $username instanceof User ) {
$username = $username->getName();
}
$username = self::normalizeUsername( $username );
if ( !isset( $this->cache[$username] ) ) {
if ( $this->misses >= $this->missLimit && $wgUser->getName() !== $username ) {
if( $this->misses === $this->missLimit ) {
$this->misses++;
wfDebug( __METHOD__ . ": too many misses, returning default onwards\n" );
}
return $this->getDefault();
} else {
$this->misses++;
$this->doQuery( $username, $caller );
}
}
/* Undefined if there is a valid username which for some reason doesn't
* exist in the database.
*/
return isset( $this->cache[$username] ) ? $this->cache[$username] : $this->getDefault();
}
/**
* Wrapper for doQuery that processes raw LinkBatch data.
*
* @param $data
* @param $caller
*/
public function doLinkBatch( $data, $caller = '' ) {
$users = array();
foreach ( $data as $ns => $pagenames ) {
if ( !MWNamespace::hasGenderDistinction( $ns ) ) continue;
foreach ( array_keys( $pagenames ) as $username ) {
$users[$username] = true;
}
}
$this->doQuery( array_keys( $users ), $caller );
}
/**
* Wrapper for doQuery that processes a title or string array.
*
* @since 1.20
* @param $titles List: array of Title objects or strings
* @param $caller String: the calling method
*/
public function doTitlesArray( $titles, $caller = '' ) {
$users = array();
foreach ( $titles as $title ) {
$titleObj = is_string( $title ) ? Title::newFromText( $title ) : $title;
if ( !$titleObj ) {
continue;
}
if ( !MWNamespace::hasGenderDistinction( $titleObj->getNamespace() ) ) {
continue;
}
$users[] = $titleObj->getText();
}
$this->doQuery( $users, $caller );
}
/**
* Preloads genders for given list of users.
* @param $users List|String: usernames
* @param $caller String: the calling method
*/
public function doQuery( $users, $caller = '' ) {
$default = $this->getDefault();
$usersToCheck = array();
foreach ( (array) $users as $value ) {
$name = self::normalizeUsername( $value );
// Skip users whose gender setting we already know
if ( !isset( $this->cache[$name] ) ) {
// For existing users, this value will be overwritten by the correct value
$this->cache[$name] = $default;
// query only for valid names, which can be in the database
if( User::isValidUserName( $name ) ) {
$usersToCheck[] = $name;
}
}
}
if ( count( $usersToCheck ) === 0 ) {
return;
}
$dbr = wfGetDB( DB_SLAVE );
$table = array( 'user', 'user_properties' );
$fields = array( 'user_name', 'up_value' );
$conds = array( 'user_name' => $usersToCheck );
$joins = array( 'user_properties' =>
array( 'LEFT JOIN', array( 'user_id = up_user', 'up_property' => 'gender' ) ) );
$comment = __METHOD__;
if ( strval( $caller ) !== '' ) {
$comment .= "/$caller";
}
$res = $dbr->select( $table, $fields, $conds, $comment, array(), $joins );
foreach ( $res as $row ) {
$this->cache[$row->user_name] = $row->up_value ? $row->up_value : $default;
}
}
private static function normalizeUsername( $username ) {
// Strip off subpages
$indexSlash = strpos( $username, '/' );
if ( $indexSlash !== false ) {
$username = substr( $username, 0, $indexSlash );
}
// normalize underscore/spaces
return strtr( $username, '_', ' ' );
}
}
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