<?php

/**
 * Poppassd Password Driver
 *
 * Driver to change passwords via Poppassd/Courierpassd
 *
 * @version 2.0
 * @author Philip Weir
 *
 * Copyright (C) The Roundcube Dev Team
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see https://www.gnu.org/licenses/.
 */

class rcube_poppassd_password
{
    function format_error_result($code, $line)
    {
        if (preg_match('/^\d\d\d\s+(\S.*)\s*$/', $line, $matches)) {
            return ['code' => $code, 'message' => $matches[1]];
        }

        return $code;
    }

    function save($curpass, $passwd, $username)
    {
        $rcmail   = rcmail::get_instance();
        $poppassd = new Net_Socket();

        $port = $rcmail->config->get('password_pop_port', 106);
        $host = $rcmail->config->get('password_pop_host', 'localhost');
        $host = rcube_utils::parse_host($host);

        $result = $poppassd->connect($host, $port, null);

        if (is_a($result, 'PEAR_Error')) {
            return $this->format_error_result(PASSWORD_CONNECT_ERROR, $result->getMessage());
        }

        $result = $poppassd->readLine();

        if (!preg_match('/^2\d\d/', $result)) {
            $poppassd->disconnect();
            return $this->format_error_result(PASSWORD_ERROR, $result);
        }

        $poppassd->writeLine("user ". $username);
        $result = $poppassd->readLine();

        if (!preg_match('/^[23]\d\d/', $result)) {
            $poppassd->disconnect();
            return $this->format_error_result(PASSWORD_CONNECT_ERROR, $result);
        }

        $poppassd->writeLine("pass ". $curpass);
        $result = $poppassd->readLine();

        if (!preg_match('/^[23]\d\d/', $result)) {
            $poppassd->disconnect();
            return $this->format_error_result(PASSWORD_ERROR, $result);
        }

        $poppassd->writeLine("newpass ". $passwd);
        $result = $poppassd->readLine();
        $poppassd->disconnect();

        if (!preg_match('/^2\d\d/', $result)) {
            return $this->format_error_result(PASSWORD_ERROR, $result);
        }

        return PASSWORD_SUCCESS;
    }
}