[ticket/13713] Fix priorities

PHPBB3-13713

phpBB/phpbb/mention/source/topic.php

@@ -15,18 +15,38 @@ namespace phpbb\mention\source;
 
 class topic extends base_user
 {
+	/**
+	 * {@inheritdoc}
+	 */
+	public function get_priority($row)
+	{
+		/*
+		 * Topic's open poster is probably the most mentionable user in the topic
+		 * so we give him a significant priority
+		 */
+		if ($row['user_id'] === $row['topic_poster'])
+		{
+			return 5;
+		}
+
+		return 1;
+	}
+
 	/**
 	 * {@inheritdoc}
 	 */
 	protected function query($keyword, $topic_id)
 	{
 		/*
+		 * Select poster's username together with topic author's ID
+		 * that will be later used for priotirisation
+		 *
 		 * For optimization purposes all users are returned regardless of the keyword
 		 * Names filtering is done on the frontend
 		 * Results will be cached on a per-topic basis
 		 */
 		$query = $this->db->sql_build_query('SELECT', [
-			'SELECT'    => 'u.username, u.user_id',
+			'SELECT'    => 'u.username, u.user_id, t.topic_poster',
 			'FROM'      => [
 				USERS_TABLE => 'u',
 			],
@@ -34,7 +54,11 @@ class topic extends base_user
 				[
 					'FROM' => [POSTS_TABLE => 'p'],
 					'ON'   => 'u.user_id = p.poster_id'
-				]
+				],
+				[
+					'FROM' => [TOPICS_TABLE => 't'],
+					'ON'   => 't.topic_id = p.topic_id'
+				],
 			],
 			'WHERE'     => 'p.topic_id = ' . $topic_id . '
 				AND ' . $this->db->sql_in_set('u.user_type', [USER_NORMAL, USER_FOUNDER]),