log-driver.php: split up log driver

inc/Data/Driver/LogTrait.php

@@ -0,0 +1,26 @@
+<?php
+namespace Vichan\Data\Driver;
+
+defined('TINYBOARD') or exit;
+
+
+trait LogTrait {
+	public static function levelToString(int $level): string {
+		switch ($level) {
+			case LogDriver::EMERG:
+				return 'EMERG';
+			case LogDriver::ERROR:
+				return 'ERROR';
+			case LogDriver::WARNING:
+				return 'WARNING';
+			case LogDriver::NOTICE:
+				return 'NOTICE';
+			case LogDriver::INFO:
+				return 'INFO';
+			case LogDriver::DEBUG:
+				return 'DEBUG';
+			default:
+				throw new \InvalidArgumentException('Not a logging level');
+		}
+	}
+}