added getLongestEntry

Signed-off-by: tracer <tracer@24unix.net>

src/Controller/NameserverController.php

@@ -178,4 +178,24 @@ class NameserverController
 			exit($e->getMessage());
 		}
 	}
+	
+	/**
+	 * @param String $field
+	 *
+	 * @return int
+	 */
+	public function getLongestEntry(String $field): int
+	{
+		$statement = "
+            SELECT MAX(LENGTH(" . $field . ")) as length FROM " . DatabaseConnection::TABLE_NAMESERVERS;
+		
+		try {
+			$statement = $this->databaseConnection->getConnection()->prepare($statement);
+			$statement->execute();
+			$result =  $statement->fetch();
+			return $result['length'];
+		} catch (PDOException $e) {
+			exit($e->getMessage());
+		}
+	}
 }