[ticket/13713] Fix case for phpBB directory

PHPBB3-13713

phpBB/phpbb/mention/source/usergroup.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license       GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\mention\source;
+
+class usergroup extends group
+{
+	/** @var  \phpbb\user */
+	protected $user;
+
+	/**
+	 * Constructor
+	 */
+	public function __construct(\phpbb\db\driver\driver_interface $db, \phpbb\group\helper $helper, \phpbb\user $user)
+	{
+		$this->user = $user;
+
+		parent::__construct($db, $helper);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function query($keyword, $topic_id)
+	{
+		$query = $this->db->sql_build_query('SELECT', [
+			'SELECT'    => 'g.group_id',
+			'FROM'      => [
+				GROUPS_TABLE => 'g',
+			],
+			'LEFT_JOIN' => [
+				[
+					'FROM' => [USER_GROUP_TABLE => 'ug'],
+					'ON'   => 'g.group_id = ug.group_id'
+				]
+			],
+			'WHERE'     => 'ug.user_id = ' . (int) $this->user->data['user_id'],
+		]);
+		return $query;
+	}
+}