added autochatc database handler from DBmodel instance,

added set rootDir for Creator,
added deduct numeric (unix timestamp) for datetime column,
added method existsTable for Maintenance

src/Maintenance.php

@@ -24,7 +24,7 @@ class Maintenance
 
 	public string $lastMessage = '';
 
-	private DBmodel $dbh;
+	protected DBmodel $dbh;
 
 	public function __construct(?DBmodel $dbh)
 	{
@@ -79,6 +79,14 @@ class Maintenance
 		return 0;
 	}
 
+	public function existsTable($table_name)
+	{
+		return $this->testDB(
+			'SHOW TABLES LIKE "' . $table_name . '"',
+			$table_name
+		);
+	}
+
 	public function checkDBTable($table_name, $definition)
 	{
 		if (strlen($table_name) <= 0) {