Add auto token generate during Thread creation

src/messenger/webim/libs/classes/thread.php

@@ -213,6 +213,7 @@ Class Thread {
 		if (empty($thread->id)) {
 			return false;
 		}
+		$thread->lastToken = self::nextToken();
 		return $thread;
 	}
 
@@ -320,6 +321,15 @@ Class Thread {
 		return $val;
 	}
 
+	/**
+	 * Create thread token
+	 *
+	 * @return int Thread token
+	 */
+	protected static function nextToken() {
+		return rand(99999, 99999999);
+	}
+
 	/**
 	 * Implementation of the magic __get method
 	 *