<?php
namespace OpenVPN;

class LogMonitor {
    private $host;
    private $port;
    private $socket;

    public function __construct($host = '127.0.0.1', $port = 7505) {
        $this->host = $host;
        $this->port = $port;
    }

    public function connect() {
        $this->socket = fsockopen($this->host, $this->port, $errno, $errstr, 5);
        if (!$this->socket) {
            throw new \Exception("Management connection failed: $errstr ($errno)");
        }
        stream_set_timeout($this->socket, 2);
        $this->send("log on");
    }

    private function send($cmd) {
        fwrite($this->socket, "$cmd\n");
    }

    public function getTlsErrors() {
        $this->connect();
        $errors = [];

        while (!feof($this->socket)) {
            $line = fgets($this->socket);
            if (str_contains($line, 'TLS Error') || str_contains($line, 'VERIFY ERROR')) {
                $errors[] = trim($line);
            }
        }

        fclose($this->socket);
        return $errors;
    }
}