<?php

$_POST['domain'] = formatDomain($_POST['domain']);

if (dirsStatuses('dns')[$_POST['dir']] !== false)
	output(403, 'Wrong value for <code>dir</code>.');

if (query('select', 'sites', ['domain' => $_POST['domain']], 'domain') !== [])
	output(403, _('This domain already exists on this service. Use another one.'));

$remoteAaaaRecords = dns_get_record($_POST['domain'], DNS_AAAA);
if (is_array($remoteAaaaRecords) !== true)
	output(500, sprintf(_('Can\'t retrieve the %s record.'), 'AAAA'));
if (equalArrays([CONF['ht']['ipv6_address']], array_column($remoteAaaaRecords, 'ipv6')) !== true)
	output(403, sprintf(_('This domain must have %2$s as its only %1$s record.'), 'AAAA', '<code>' . CONF['ht']['ipv6_address'] . '</code>'));

$remoteARecords = dns_get_record($_POST['domain'], DNS_A);
if (is_array($remoteARecords) !== true)
	output(500, sprintf(_('Can\'t retrieve the %s record.'), 'A'));
if (equalArrays([CONF['ht']['ipv4_address']], array_column($remoteARecords, 'ip')) !== true)
	output(403, sprintf(_('This domain must have %2$s as its only %1$s record.'), 'A', '<code>' . CONF['ht']['ipv4_address'] . '</code>'));

$remoteTXTRecords = dns_get_record($_POST['domain'], DNS_TXT);
if (is_array($remoteTXTRecords) !== true)
	output(500, sprintf(_('Can\'t retrieve the %s record.'), 'TXT'));
if (preg_match('/^' . preg_quote(SERVER_NAME, '/') . '_domain-verification=([0-9a-f]{8})-([0-9a-f]{32})$/Dm', implode(LF, array_column($remoteTXTRecords, 'txt')), $matches) !== 1)
	output(403, _('No TXT record with the expected format has been found.'));

checkAuthToken($matches[1], $matches[2]);

rateLimit();

addSite($_SESSION['id'], $_POST['dir'], $_POST['domain'], 'dns');

exec('2>&1 ' . CONF['ht']['sudo_path'] . ' ' . CONF['ht']['certbot_path'] . ' certonly' . (($_SESSION['type'] === 'approved') ? '' : ' --test-cert') . ' --key-type rsa --rsa-key-size 3072 --webroot --webroot-path ' . CONF['ht']['acme_path'] . ' --domain ' . $_POST['domain'], $output, $returnCode);
if ($returnCode !== 0)
	output(500, 'Certbot failed to get a Let\'s Encrypt certificate.', $output);

htRelativeSymlink('../fs/' . $_SESSION['id'] . '/' . $_POST['dir'], CONF['ht']['ht_path'] . '/uri/' . $_POST['domain']);

output(200, sprintf(_('%s added on this directory.'), PAGE_METADATA['title']));