1 files changed, 69 insertions, 0 deletions
diff --git a/www/wiki/maintenance/checkUsernames.php b/www/wiki/maintenance/checkUsernames.php
new file mode 100644
index 00000000..6c1343aa
--- /dev/null
+++ b/www/wiki/maintenance/checkUsernames.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * Check that database usernames are actually valid.
+ *
+ * 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
+ * @ingroup Maintenance
+ */
+
+require_once __DIR__ . '/Maintenance.php';
+
+/**
+ * Maintenance script to check that database usernames are actually valid.
+ *
+ * An existing usernames can become invalid if User::isValidUserName()
+ * is altered or if we change the $wgMaxNameChars
+ *
+ * @ingroup Maintenance
+ */
+class CheckUsernames extends Maintenance {
+
+	public function __construct() {
+		parent::__construct();
+		$this->addDescription( 'Verify that database usernames are actually valid' );
+		$this->setBatchSize( 1000 );
+	}
+
+	function execute() {
+		$dbr = $this->getDB( DB_REPLICA );
+
+		$maxUserId = 0;
+		do {
+			$res = $dbr->select( 'user',
+				[ 'user_id', 'user_name' ],
+				[ 'user_id > ' . $maxUserId ],
+				__METHOD__,
+				[
+					'ORDER BY' => 'user_id',
+					'LIMIT' => $this->getBatchSize(),
+				]
+			);
+
+			foreach ( $res as $row ) {
+				if ( !User::isValidUserName( $row->user_name ) ) {
+					$this->output( sprintf( "Found: %6d: '%s'\n", $row->user_id, $row->user_name ) );
+					wfDebugLog( 'checkUsernames', $row->user_name );
+				}
+			}
+			$maxUserId = $row->user_id;
+		} while ( $res->numRows() );
+	}
+}
+
+$maintClass = CheckUsernames::class;
+require_once RUN_MAINTENANCE_IF_MAIN;