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<?php
/**
* 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
*/
declare( strict_types = 1 );
namespace MediaWiki\Babel;
use MediaWiki\MediaWikiServices;
use Wikimedia\Rdbms\IDatabase;
use Wikimedia\Rdbms\LBFactory;
class Database {
private LBFactory $loadBalancerFactory;
public function __construct() {
$this->loadBalancerFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
}
/**
* @param int $index
* @param string|bool $wiki Database name if querying a different wiki
* @return IDatabase
*/
protected function getDB( int $index, $wiki = false ): IDatabase {
return $this->loadBalancerFactory->getMainLB( $wiki )
->getConnection( $index, [], $wiki );
}
/**
* @param int $id user id
* @return string[] [ lang => level ]
*/
public function getForUser( int $id ): array {
$rows = $this->getDB( DB_REPLICA )->newSelectQueryBuilder()
->select( [ 'babel_lang', 'babel_level' ] )
->from( 'babel' )
->where( [ 'babel_user' => $id ] )
->caller( __METHOD__ )
->fetchResultSet();
$return = [];
foreach ( $rows as $row ) {
$return[$row->babel_lang] = $row->babel_level;
}
return $return;
}
/**
* @param string $wiki Database name
* @param string $username
* @return string[] [ lang => level ]
*/
public function getForRemoteUser( string $wiki, string $username ): array {
$rows = $this->getDB( DB_REPLICA, $wiki )->newSelectQueryBuilder()
->select( [ 'babel_lang', 'babel_level' ] )
->from( 'babel' )
->join( 'user', null, 'babel_user=user_id' )
->where( [
'user_name' => $username
] )
->caller( __METHOD__ )
->fetchResultSet();
$return = [];
foreach ( $rows as $row ) {
$return[$row->babel_lang] = $row->babel_level;
}
return $return;
}
/**
* @param int $id
* @param string[] $data [ lang => level ]
* @return bool true if changes to the db were made
*/
public function setForUser( int $id, array $data ): bool {
$dbw = $this->getDB( DB_PRIMARY );
$newRows = [];
foreach ( $data as $lang => $level ) {
$newRows[$lang] = [
'babel_lang' => $lang,
'babel_level' => $level,
'babel_user' => $id
];
}
$rowsDelete = [];
$res = $dbw->newSelectQueryBuilder()
->select( [ 'babel_lang', 'babel_level' ] )
->from( 'babel' )
->where( [ 'babel_user' => $id ] )
->caller( __METHOD__ )
->fetchResultSet();
foreach ( $res as $row ) {
if ( isset( $newRows[$row->babel_lang] ) ) {
if ( $newRows[$row->babel_lang]['babel_level'] === $row->babel_level ) {
// Matching row already exists
unset( $newRows[$row->babel_lang] );
}
} else {
$rowsDelete[] = $row->babel_lang;
}
}
if ( $rowsDelete ) {
$dbw->newDeleteQueryBuilder()
->deleteFrom( 'babel' )
->where( [ 'babel_user' => $id, 'babel_lang' => $rowsDelete ] )
->caller( __METHOD__ )
->execute();
}
if ( $newRows ) {
$dbw->newReplaceQueryBuilder()
->replaceInto( 'babel' )
->uniqueIndexFields( [ 'babel_user', 'babel_lang' ] )
->rows( array_values( $newRows ) )
->caller( __METHOD__ )
->execute();
}
return $rowsDelete || $newRows;
}
}