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	diff --git a/plugins/managesieve/lib/Roundcube/rcube_sieve_vacation.php b/plugins/managesieve/lib/Roundcube/rcube_sieve_vacation.php
	index 988ac3a10..44a2778a2 100644
	--- a/plugins/managesieve/lib/Roundcube/rcube_sieve_vacation.php
	+++ b/plugins/managesieve/lib/Roundcube/rcube_sieve_vacation.php
	@@ -1,905 +1,907 @@
	<?php

	/**
	* Managesieve Vacation Engine
	*
	* Engine part of Managesieve plugin implementing UI and backend access.
	*
	* Copyright (C) Kolab Systems AG
	*
	* 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 http://www.gnu.org/licenses/.
	*/

	class rcube_sieve_vacation extends rcube_sieve_engine
	{
	protected $error;
	protected $script_name;
	protected $vacation = [];

	function actions()
	{
	$error = $this->start('vacation');

	// find current vacation rule
	if (!$error) {
	$this->vacation_rule();
	$this->vacation_post();
	}

	$this->plugin->add_label('vacation.saving');
	$this->rc->output->add_handlers([
	'vacationform' => [$this, 'vacation_form'],
	]);

	$this->rc->output->set_pagetitle($this->plugin->gettext('vacation'));
	$this->rc->output->send('managesieve.vacation');
	}

	/**
	* Find and load sieve script with/for vacation rule
	*
	* @param string $script_name Optional script name
	*
	* @return int Connection status: 0 on success, >0 on failure
	*/
	protected function load_script($script_name = null)
	{
	if ($this->script_name !== null) {
	return 0;
	}

	$list = $this->list_scripts();
	$master = $this->rc->config->get('managesieve_kolab_master');
	$included = [];

	$this->script_name = false;

	// first try the active script(s)...
	if (!empty($this->active)) {
	// Note: there can be more than one active script on KEP:14-enabled server
	foreach ($this->active as $script) {
	if ($this->sieve->load($script)) {
	foreach ($this->sieve->script->as_array() as $rule) {
	if (!empty($rule['actions'])) {
	$action = $rule['actions'][0];
	if ($action['type'] == 'vacation') {
	$this->script_name = $script;
	return 0;
	}
	else if (empty($master) && empty($action['global']) && $action['type'] == 'include') {
	$included[] = $action['target'];
	}
	}
	}
	}
	}

	// ...else try scripts included in active script (not for KEP:14)
	foreach ($included as $script) {
	if ($this->sieve->load($script)) {
	foreach ($this->sieve->script->as_array() as $rule) {
	if (!empty($rule['actions']) && $rule['actions'][0]['type'] == 'vacation') {
	$this->script_name = $script;
	return 0;
	}
	}
	}
	}
	}

	// try all other scripts
	if (!empty($list)) {
	// else try included scripts
	foreach (array_diff($list, $included, $this->active) as $script) {
	if ($this->sieve->load($script)) {
	foreach ($this->sieve->script->as_array() as $rule) {
	if (!empty($rule['actions']) && $rule['actions'][0]['type'] == 'vacation') {
	$this->script_name = $script;
	return 0;
	}
	}
	}
	}

	// none of the scripts contains existing vacation rule
	// use any (first) active or just existing script (in that order)
	if (!empty($this->active)) {
	$this->sieve->load($this->script_name = $this->active[0]);
	}
	else {
	$this->sieve->load($this->script_name = $list[0]);
	}
	}

	return $this->sieve->error();
	}

	protected function vacation_rule()
	{
	if ($this->script_name === false \|\| $this->script_name === null \|\| !$this->sieve->load($this->script_name)) {
	return;
	}

	$list = [];
	$active = in_array($this->script_name, $this->active);

	// find (first) vacation rule
	foreach ($this->script as $idx => $rule) {
	if (empty($this->vacation) && !empty($rule['actions']) && $rule['actions'][0]['type'] == 'vacation') {
	$action = 'keep';
	$target = null;

	foreach ($rule['actions'] as $act) {
	if ($act['type'] == 'discard' \|\| $act['type'] == 'keep') {
	$action = $act['type'];
	}
	else if ($act['type'] == 'redirect') {
	$action = $act['copy'] ? 'copy' : 'redirect';
	$target = $act['target'];
	}
	}

	$this->vacation = array_merge($rule['actions'][0], [
	'idx' => $idx,
	'disabled' => $rule['disabled'] \|\| !$active,
	'name' => $rule['name'],
	'tests' => $rule['tests'],
	'action' => $action,
	'target' => $target,
	]);
	}
	else if ($active) {
	$list[$idx] = $rule['name'] ?: ('#' . ($idx + 1));
	}
	}

	$this->vacation['list'] = $list;
	}

	protected function vacation_post()
	{
	if (empty($_POST)) {
	return;
	}

	$date_extension = in_array('date', $this->exts);
	$regex_extension = in_array('regex', $this->exts);

	// set user's timezone
	try {
	$timezone = new DateTimeZone($this->rc->config->get('timezone', 'GMT'));
	}
	catch (Exception $e) {
	$timezone = new DateTimeZone('GMT');
	}

	$status = rcube_utils::get_input_value('vacation_status', rcube_utils::INPUT_POST);
	$from = rcube_utils::get_input_value('vacation_from', rcube_utils::INPUT_POST, true);
	$subject = rcube_utils::get_input_value('vacation_subject', rcube_utils::INPUT_POST, true);
	$reason = rcube_utils::get_input_value('vacation_reason', rcube_utils::INPUT_POST, true);
	$addresses = rcube_utils::get_input_value('vacation_addresses', rcube_utils::INPUT_POST, true);
	$interval = rcube_utils::get_input_value('vacation_interval', rcube_utils::INPUT_POST);
	$interval_type = rcube_utils::get_input_value('vacation_interval_type', rcube_utils::INPUT_POST);
	$date_from = rcube_utils::get_input_value('vacation_datefrom', rcube_utils::INPUT_POST);
	$date_to = rcube_utils::get_input_value('vacation_dateto', rcube_utils::INPUT_POST);
	$time_from = rcube_utils::get_input_value('vacation_timefrom', rcube_utils::INPUT_POST);
	$time_to = rcube_utils::get_input_value('vacation_timeto', rcube_utils::INPUT_POST);
	$after = rcube_utils::get_input_value('vacation_after', rcube_utils::INPUT_POST);
	$action = rcube_utils::get_input_value('vacation_action', rcube_utils::INPUT_POST);
	$target = rcube_utils::get_input_value('action_target', rcube_utils::INPUT_POST, true);
	$target_domain = rcube_utils::get_input_value('action_domain', rcube_utils::INPUT_POST);

	$interval_type = $interval_type == 'seconds' ? 'seconds' : 'days';
	$vacation_action['type'] = 'vacation';
	$vacation_action['reason'] = $this->strip_value(str_replace("\r\n", "\n", $reason), true);
	$vacation_action['subject'] = trim($subject);
	$vacation_action['from'] = trim($from);
	$vacation_action['addresses'] = $addresses;
	$vacation_action[$interval_type] = $interval;
	$vacation_tests = !empty($this->vacation['tests']) ? $this->vacation['tests'] : [];

	foreach ((array) $vacation_action['addresses'] as $aidx => $address) {
	$vacation_action['addresses'][$aidx] = $address = trim($address);

	if (empty($address)) {
	unset($vacation_action['addresses'][$aidx]);
	}
	else if (!rcube_utils::check_email($address)) {
	$error = 'noemailwarning';
	break;
	}
	}

	if (!empty($vacation_action['from'])) {
	// According to RFC5230 the :from string must specify a valid [RFC2822] mailbox-list
	// we'll try to extract addresses and validate them separately
	$from = rcube_mime::decode_address_list($vacation_action['from'], null, true, RCUBE_CHARSET);
	foreach ((array) $from as $idx => $addr) {
	if (empty($addr['mailto']) \|\| !rcube_utils::check_email($addr['mailto'])) {
	$error = $from_error = 'noemailwarning';
	break;
	}
	else {
	$from[$idx] = format_email_recipient($addr['mailto'], $addr['name']);
	}
	}

	// Only one address is allowed (at least on cyrus imap)
	if (is_array($from) && count($from) > 1) {
	$error = $from_error = 'noemailwarning';
	}

	// Then we convert it back to RFC2822 format
	if (empty($from_error) && !empty($from)) {
	$vacation_action['from'] = Mail_mimePart::encodeHeader(
	'From', implode(', ', $from), RCUBE_CHARSET, 'base64', '');
	}
	}

	if ($vacation_action['reason'] == '') {
	$error = 'managesieve.emptyvacationbody';
	}

	if ($vacation_action[$interval_type] && !preg_match('/^[0-9]+$/', $vacation_action[$interval_type])) {
	$error = 'managesieve.forbiddenchars';
	}

	// find and remove existing date/regex/true rules
	foreach ((array) $vacation_tests as $idx => $t) {
	if ($t['test'] == 'currentdate' \|\| $t['test'] == 'true'
	\|\| ($t['test'] == 'header' && $t['type'] == 'regex' && $t['arg1'] == 'received')
	) {
	unset($vacation_tests[$idx]);
	}
	}

	if ($date_extension) {
	$date_format = $this->rc->config->get('date_format', 'Y-m-d');
	foreach (['date_from', 'date_to'] as $var) {
	$time = ${str_replace('date', 'time', $var)};
	$date = rcube_utils::format_datestr($$var, $date_format);
	$date = trim($date . ' ' . $time);

	if ($date && ($dt = rcube_utils::anytodatetime($date, $timezone))) {
	if ($time) {
	$vacation_tests[] = [
	'test' => 'currentdate',
	'part' => 'iso8601',
	'type' => 'value-' . ($var == 'date_from' ? 'ge' : 'le'),
	'zone' => $dt->format('O'),
	'arg' => str_replace('+00:00', 'Z', strtoupper($dt->format('c'))),
	];
	}
	else {
	$vacation_tests[] = [
	'test' => 'currentdate',
	'part' => 'date',
	'type' => 'value-' . ($var == 'date_from' ? 'ge' : 'le'),
	'zone' => $dt->format('O'),
	'arg' => $dt->format('Y-m-d'),
	];
	}
	}
	}
	}
	else if ($regex_extension) {
	// Add date range rules if range specified
	if ($date_from && $date_to) {
	if ($tests = self::build_regexp_tests($date_from, $date_to, $error)) {
	$vacation_tests = array_merge($vacation_tests, $tests);
	}
	}
	}

	if ($action == 'redirect' \|\| $action == 'copy') {
	if ($target_domain) {
	$target .= '@' . $target_domain;
	}

	if (empty($target) \|\| !rcube_utils::check_email($target)) {
	$error = 'noemailwarning';
	}
	}

	if (empty($vacation_tests)) {
	$vacation_tests = (array) $this->rc->config->get('managesieve_vacation_test', [['test' => 'true']]);
	}

	if (empty($error)) {
	$rule = $this->vacation;
	$rule['type'] = 'if';
	$rule['name'] = !empty($rule['name']) ? $rule['name'] : $this->plugin->gettext('vacation');
	$rule['disabled'] = $status == 'off';
	$rule['tests'] = $vacation_tests;
	$rule['join'] = $date_extension ? count($vacation_tests) > 1 : false;
	$rule['actions'] = [$vacation_action];
	$rule['after'] = $after;

	if ($action && $action != 'keep') {
	$rule['actions'][] = [
	'type' => $action == 'discard' ? 'discard' : 'redirect',
	'copy' => $action == 'copy',
	'target' => $action != 'discard' ? $target : '',
	];
	}

	if ($this->merge_rule($rule, $this->vacation, $this->script_name)) {
	$this->rc->output->show_message('managesieve.vacationsaved', 'confirmation');
	$this->rc->output->send();
	}
	}

	if (empty($error)) {
	$error = 'managesieve.saveerror';
	}

	$this->rc->output->show_message($error, 'error');
	$this->rc->output->send();
	}

	/**
	* Independent vacation form
	*/
	public function vacation_form($attrib)
	{
	// check supported extensions
	$date_extension = in_array('date', $this->exts);
	$regex_extension = in_array('regex', $this->exts);
	$seconds_extension = in_array('vacation-seconds', $this->exts);

	// build FORM tag
	$form_id = !empty($attrib['id']) ? $attrib['id'] : 'form';
	$out = $this->rc->output->request_form([
	'id' => $form_id,
	'name' => $form_id,
	'method' => 'post',
	'task' => 'settings',
	'action' => 'plugin.managesieve-vacation',
	'noclose' => true
	] + $attrib
	);

	$from_addr = $this->rc->config->get('managesieve_vacation_from_init');
	$auto_addr = $this->rc->config->get('managesieve_vacation_addresses_init');

	if (count($this->vacation) < 2) {
	if ($auto_addr) {
	$this->vacation['addresses'] = $this->user_emails();
	}
	if ($from_addr) {
	$default_identity = $this->rc->user->list_emails(true);
	$this->vacation['from'] = format_email_recipient($default_identity['email'], $default_identity['name']);
	}
	}
	else if (!empty($this->vacation['from'])) {
	$from = rcube_mime::decode_address_list($this->vacation['from'], null, true, RCUBE_CHARSET);
	foreach ((array) $from as $idx => $addr) {
	$from[$idx] = format_email_recipient($addr['mailto'], $addr['name']);
	}
	$this->vacation['from'] = implode(', ', $from);
	}

	// form elements
	$from = new html_inputfield(['name' => 'vacation_from', 'id' => 'vacation_from', 'size' => 50, 'class' => 'form-control']);
	$subject = new html_inputfield(['name' => 'vacation_subject', 'id' => 'vacation_subject', 'size' => 50, 'class' => 'form-control']);
	$reason = new html_textarea(['name' => 'vacation_reason', 'id' => 'vacation_reason', 'cols' => 60, 'rows' => 8]);
	$interval = new html_inputfield(['name' => 'vacation_interval', 'id' => 'vacation_interval', 'size' => 5, 'class' => 'form-control']);
	$addresses = '<textarea name="vacation_addresses" id="vacation_addresses" data-type="list" data-size="30" style="display: none">'
	. (!empty($this->vacation['addresses']) ? rcube::Q(implode("\n", (array) $this->vacation['addresses']), 'strict', false) : '')
	. '</textarea>';
	$status = new html_select(['name' => 'vacation_status', 'id' => 'vacation_status', 'class' => 'custom-select']);
	$action = new html_select(['name' => 'vacation_action', 'id' => 'vacation_action', 'class' => 'custom-select', 'onchange' => 'vacation_action_select()']);
	$addresses_link = new html_inputfield([
	'type' => 'button',
	'href' => '#',
	'class' => 'button',
	'onclick' => rcmail_output::JS_OBJECT_NAME . '.managesieve_vacation_addresses()'
	]);

	$redirect = !empty($this->vacation['action'])
	&& ($this->vacation['action'] == 'redirect' \|\| $this->vacation['action'] == 'copy');

	$status->add($this->plugin->gettext('vacation.on'), 'on');
	$status->add($this->plugin->gettext('vacation.off'), 'off');

	$action->add($this->plugin->gettext('vacation.keep'), 'keep');
	$action->add($this->plugin->gettext('vacation.discard'), 'discard');
	if ($redirect \|\| !in_array('redirect', $this->disabled_actions)) {
	$action->add($this->plugin->gettext('vacation.redirect'), 'redirect');
	if (in_array('copy', $this->exts)) {
	$action->add($this->plugin->gettext('vacation.copy'), 'copy');
	}
	}

	if (
	$this->rc->config->get('managesieve_vacation') != 2
	&& !empty($this->vacation['list'])
	&& in_array($this->script_name, $this->active)
	) {
	$after = new html_select(['name' => 'vacation_after', 'id' => 'vacation_after', 'class' => 'custom-select']);

	$after->add('---', '');
	foreach ($this->vacation['list'] as $idx => $rule) {
	$after->add($rule, $idx);
	}
	}

	$interval_txt = $interval->show(self::vacation_interval($this->vacation, $this->exts));
	if ($seconds_extension) {
	$interval_select = new html_select(['name' => 'vacation_interval_type', 'class' => 'custom-select']);
	$interval_select->add($this->plugin->gettext('days'), 'days');
	$interval_select->add($this->plugin->gettext('seconds'), 'seconds');
	$interval_txt .= $interval_select->show(isset($this->vacation['seconds']) ? 'seconds' : 'days');
	}
	else {
	$interval_txt .= "\n" . html::span('input-group-append',
	html::span('input-group-text', $this->plugin->gettext('days')));
	}

	$date_format = $this->rc->config->get('date_format', 'Y-m-d');
	$time_format = $this->rc->config->get('time_format', 'H:i');

	if ($date_extension \|\| $regex_extension) {
	$date_from = new html_inputfield(['name' => 'vacation_datefrom', 'id' => 'vacation_datefrom', 'class' => 'datepicker form-control', 'size' => 12]);
	$date_to = new html_inputfield(['name' => 'vacation_dateto', 'id' => 'vacation_dateto', 'class' => 'datepicker form-control', 'size' => 12]);
	}

	if ($date_extension) {
	$time_from = new html_inputfield(['name' => 'vacation_timefrom', 'id' => 'vacation_timefrom', 'size' => 7, 'class' => 'form-control']);
	$time_to = new html_inputfield(['name' => 'vacation_timeto', 'id' => 'vacation_timeto', 'size' => 7, 'class' => 'form-control']);
	$date_value = [];

	if (!empty($this->vacation['tests'])) {
	foreach ((array) $this->vacation['tests'] as $test) {
	if ($test['test'] == 'currentdate') {
	$idx = $test['type'] == 'value-ge' ? 'from' : 'to';

	if ($test['part'] == 'date') {
	$date_value[$idx]['date'] = $test['arg'];
	}
	else if ($test['part'] == 'iso8601') {
	$date_value[$idx]['datetime'] = $test['arg'];
	}
	}
	}
	}

	foreach ($date_value as $idx => $value) {
	$date = !empty($value['datetime']) ? $value['datetime'] : $value['date'];
	$date_value[$idx] = $this->rc->format_date($date, $date_format, false);

	if (!empty($value['datetime'])) {
	$date_value['time_' . $idx] = $this->rc->format_date($date, $time_format, true);
	}
	}
	}
	else if ($regex_extension) {
	// Sieve 'date' extension not available, read start/end from RegEx based rules instead
	if ($date_tests = self::parse_regexp_tests($this->vacation['tests'])) {
	$date_value['from'] = $this->rc->format_date($date_tests['from'], $date_format, false);
	$date_value['to'] = $this->rc->format_date($date_tests['to'], $date_format, false);
	}
	}

	// force domain selection in redirect email input
	$domains = (array) $this->rc->config->get('managesieve_domains');

	if (!empty($domains)) {
	sort($domains);

	$domain_select = new html_select(['name' => 'action_domain', 'id' => 'action_domain', 'class' => 'custom-select']);
	$domain_select->add(array_combine($domains, $domains));

	if ($redirect && !empty($this->vacation['target'])) {
	$parts = explode('@', $this->vacation['target']);
	if (!empty($parts)) {
	$this->vacation['domain'] = array_pop($parts);
	$this->vacation['target'] = implode('@', $parts);
	}
	}
	}

	// redirect target
	$action_target = ' <span id="action_target_span" class="input-group"' . (!$redirect ? ' style="display:none"' : '') . '>'
	. '<input type="text" name="action_target" id="action_target"'
	. ' value="' .($redirect ? rcube::Q($this->vacation['target'], 'strict', false) : '') . '"'
	. (!empty($domain_select) ? ' size="20"' : ' size="35"') . '/>'
	. (!empty($domain_select) ? ' <span class="input-group-append input-group-prepend"><span class="input-group-text">@</span></span>'
	. $domain_select->show(!empty($this->vacation['domain']) ? $this->vacation['domain'] : null) : '')
	. '</span>';

	// Message tab
	$table = new html_table(['cols' => 2]);

	$table->add('title', html::label('vacation_subject', $this->plugin->gettext('vacation.subject')));
	$table->add(null, $subject->show(!empty($this->vacation['subject']) ? $this->vacation['subject'] : null));
	$table->add('title', html::label('vacation_reason', $this->plugin->gettext('vacation.body')));
	$table->add(null, $reason->show(!empty($this->vacation['reason']) ? $this->vacation['reason'] : null));

	if (!empty($date_from)) {
	$table->add('title', html::label('vacation_datefrom', $this->plugin->gettext('vacation.start')));
	$table->add(null, $date_from->show(!empty($date_value['from']) ? $date_value['from'] : null)
	. (!empty($time_from) ? ' ' . $time_from->show(!empty($date_value['time_from']) ? $date_value['time_from'] : null) : '')
	);
	$table->add('title', html::label('vacation_dateto', $this->plugin->gettext('vacation.end')));
	$table->add(null, $date_to->show(!empty($date_value['to']) ? $date_value['to'] : null)
	. (!empty($time_to) ? ' ' . $time_to->show(!empty($date_value['time_to']) ? $date_value['time_to'] : null) : ''));
	}

	$table->add('title', html::label('vacation_status', $this->plugin->gettext('vacation.status')));
	$table->add(null, $status->show(!isset($this->vacation['disabled']) \|\| $this->vacation['disabled'] ? 'off' : 'on'));

	$out .= html::tag('fieldset', '', html::tag('legend', null, $this->plugin->gettext('vacation.reply')) . $table->show($attrib));

	// Advanced tab
	$table = new html_table(['cols' => 2]);

	$table->add('title', html::label('vacation_from', $this->plugin->gettext('vacation.from')));
	$table->add(null, $from->show(!empty($this->vacation['from']) ? $this->vacation['from'] : null));
	$table->add('title', html::label('vacation_addresses', $this->plugin->gettext('vacation.addresses')));
	$table->add(null, $addresses . $addresses_link->show($this->plugin->gettext('filladdresses')));
	$table->add('title', html::label('vacation_interval', $this->plugin->gettext('vacation.interval')));
	$table->add(null, html::span('input-group', $interval_txt));

	if (!empty($after)) {
	$table->add('title', html::label('vacation_after', $this->plugin->gettext('vacation.after')));
	$table->add(null, $after->show(isset($this->vacation['idx']) ? $this->vacation['idx'] - 1 : ''));
	}

	$table->add('title', html::label('vacation_action', $this->plugin->gettext('vacation.action')));
	$table->add('vacation input-group input-group-combo',
	$action->show(!empty($this->vacation['action']) ? $this->vacation['action'] : null) . $action_target
	);

	$out .= html::tag('fieldset', '', html::tag('legend', null, $this->plugin->gettext('vacation.advanced'))
	. $table->show($attrib)
	);

	$out .= '</form>';

	$this->rc->output->add_gui_object('sieveform', $form_id);

	if (!empty($time_format)) {
	$this->rc->output->set_env('time_format', $time_format);
	}

	return $out;
	}

	protected static function build_regexp_tests($date_from, $date_to, &$error)
	{
	$tests = [];
	$dt_from = rcube_utils::anytodatetime($date_from);
	$dt_to = rcube_utils::anytodatetime($date_to);
	$interval = $dt_from->diff($dt_to);

	if ($interval->invert \|\| $interval->days > 365) {
	$error = 'managesieve.invaliddateformat';
	return;
	}

	$dt_i = $dt_from;
	$interval = new DateInterval('P1D');
	$matchexp = '';

	while (!$dt_i->diff($dt_to)->invert) {
	$days = (int) $dt_i->format('d');
	$matchexp .= $days < 10 ? "[ 0]$days" : $days;

	if ($days == $dt_i->format('t') \|\| $dt_i->diff($dt_to)->days == 0) {
	$test = [
	'test' => 'header',
	'type' => 'regex',
	'arg1' => 'received',
	'arg2' => "($matchexp) " . $dt_i->format('M Y')
	];

	$tests[] = $test;
	$matchexp = '';
	}
	else {
	$matchexp .= '\|';
	}

	$dt_i->add($interval);
	}

	return $tests;
	}

	protected static function parse_regexp_tests($tests)
	{
	$rx_from = '/^$([0-9]{2}).*$\s([A-Za-z]+)\s([0-9]{4})/';
	$rx_to = '/^$.*([0-9]{2})$\s([A-Za-z]+)\s([0-9]{4})/';
	$result = [];

	foreach ((array) $tests as $test) {
	if ($test['test'] == 'header' && $test['type'] == 'regex' && $test['arg1'] == 'received') {
	$textexp = preg_replace('/\[ ([^\]]*)\]/', '0', $test['arg2']);

	if (empty($result['from']) && preg_match($rx_from, $textexp, $matches)) {
	$result['from'] = $matches[1]." ".$matches[2]." ".$matches[3];
	}

	if (preg_match($rx_to, $textexp, $matches)) {
	$result['to'] = $matches[1]." ".$matches[2]." ".$matches[3];
	}
	}
	}

	return $result;
	}

	/**
	* Get current vacation interval
	*/
	public static function vacation_interval(&$vacation, $extensions = [])
	{
	$rcube = rcube::get_instance();
	$seconds_extension = in_array('vacation-seconds', $extensions);

	if (isset($vacation['seconds'])) {
	$interval = $vacation['seconds'];
	}
	else if (isset($vacation['days'])) {
	$interval = $vacation['days'];
	}
	else if ($interval_cfg = $rcube->config->get('managesieve_vacation_interval')) {
	if (preg_match('/^([0-9]+)s$/', $interval_cfg, $m)) {
	if ($seconds_extension) {
	$vacation['seconds'] = ($interval = intval($m[1])) ? $interval : null;
	}
	else {
	$vacation['days'] = $interval = ceil(intval($m[1])/86400);
	}
	}
	else {
	$vacation['days'] = $interval = intval($interval_cfg);
	}
	}

	return !empty($interval) ? $interval : '';
	}

	/**
	* API: get vacation rule
	*
	* @return array Vacation rule information
	*/
	public function get_vacation()
	{
	$this->exts = $this->sieve->get_extensions();
	$this->init_script();
	$this->vacation_rule();

	// check supported extensions
	$date_extension = in_array('date', $this->exts);
	$regex_extension = in_array('regex', $this->exts);

	// set user's timezone
	try {
	$timezone = new DateTimeZone($this->rc->config->get('timezone', 'GMT'));
	}
	catch (Exception $e) {
	$timezone = new DateTimeZone('GMT');
	}

	$interval = null;
	$start = null;
	$end = null;

	if ($date_extension) {
	$date_value = [];
	- foreach ((array) $this->vacation['tests'] as $test) {
	- if ($test['test'] == 'currentdate') {
	- $idx = $test['type'] == 'value-ge' ? 'start' : 'end';
	+ if (!empty($this->vacation['tests'])) {
	+ foreach ((array) $this->vacation['tests'] as $test) {
	+ if ($test['test'] == 'currentdate') {
	+ $idx = $test['type'] == 'value-ge' ? 'start' : 'end';

	- if ($test['part'] == 'date') {
	- $date_value[$idx]['date'] = $test['arg'];
	- }
	- else if ($test['part'] == 'iso8601') {
	- $date_value[$idx]['datetime'] = $test['arg'];
	+ if ($test['part'] == 'date') {
	+ $date_value[$idx]['date'] = $test['arg'];
	+ }
	+ else if ($test['part'] == 'iso8601') {
	+ $date_value[$idx]['datetime'] = $test['arg'];
	+ }
	}
	}
	}

	foreach ($date_value as $idx => $value) {
	- $$idx = new DateTime($value['datetime'] ?: $value['date'], $timezone);
	+ ${$idx} = new DateTime(!empty($value['datetime']) ? $value['datetime'] : $value['date'], $timezone);
	}
	}
	else if ($regex_extension) {
	// Sieve 'date' extension not available, read start/end from RegEx based rules instead
	if ($date_tests = self::parse_regexp_tests($this->vacation['tests'])) {
	$start = new DateTime($date_tests['from'] . ' ' . '00:00:00', $timezone);
	$end = new DateTime($date_tests['to'] . ' ' . '23:59:59', $timezone);
	}
	}

	if (isset($this->vacation['seconds'])) {
	$interval = $this->vacation['seconds'] . 's';
	}
	else if (isset($this->vacation['days'])) {
	$interval = $this->vacation['days'] . 'd';
	}

	$vacation = [
	'supported' => $this->exts,
	'interval' => $interval,
	'start' => $start,
	'end' => $end,
	- 'enabled' => $this->vacation['reason'] && empty($this->vacation['disabled']),
	- 'message' => $this->vacation['reason'],
	- 'subject' => $this->vacation['subject'],
	- 'action' => $this->vacation['action'],
	- 'target' => $this->vacation['target'],
	- 'addresses' => $this->vacation['addresses'],
	- 'from' => $this->vacation['from'],
	+ 'enabled' => !empty($this->vacation['reason']) && empty($this->vacation['disabled']),
	+ 'message' => isset($this->vacation['reason']) ? $this->vacation['reason'] : null,
	+ 'subject' => isset($this->vacation['subject']) ? $this->vacation['subject'] : null,
	+ 'action' => isset($this->vacation['action']) ? $this->vacation['action'] : null,
	+ 'target' => isset($this->vacation['target']) ? $this->vacation['target'] : null,
	+ 'addresses' => isset($this->vacation['addresses']) ? $this->vacation['addresses'] : null,
	+ 'from' => isset($this->vacation['from']) ? $this->vacation['from'] : null,
	];

	return $vacation;
	}

	/**
	* API: set vacation rule
	*
	* @param array $vacation Vacation rule information (see self::get_vacation())
	*
	* @return bool True on success, False on failure
	*/
	public function set_vacation($data)
	{
	$this->exts = $this->sieve->get_extensions();
	$this->error = false;

	$this->init_script();
	$this->vacation_rule();

	// check supported extensions
	$date_extension = in_array('date', $this->exts);
	$regex_extension = in_array('regex', $this->exts);

	$vacation['type'] = 'vacation';
	$vacation['reason'] = $this->strip_value(str_replace("\r\n", "\n", $data['message']), true);
	$vacation['addresses'] = $data['addresses'];
	$vacation['subject'] = trim($data['subject']);
	$vacation['from'] = trim($data['from']);
	$vacation_tests = (array) $this->vacation['tests'];

	foreach ((array) $vacation['addresses'] as $aidx => $address) {
	$vacation['addresses'][$aidx] = $address = trim($address);

	if (empty($address)) {
	unset($vacation['addresses'][$aidx]);
	}
	else if (!rcube_utils::check_email($address)) {
	$this->error = "Invalid address in vacation addresses: $address";
	return false;
	}
	}

	if (!empty($vacation['from']) && !rcube_utils::check_email($vacation['from'])) {
	$this->error = "Invalid address in 'from': " . $vacation['from'];
	return false;
	}

	if ($vacation['reason'] == '') {
	$this->error = "No vacation message specified";
	return false;
	}

	if (!empty($data['interval'])) {
	if (!preg_match('/^([0-9]+)\s*([sd])$/', $data['interval'], $m)) {
	$this->error = "Invalid vacation interval value: " . $data['interval'];
	return false;
	}
	else if ($m[1]) {
	$vacation[strtolower($m[2]) == 's' ? 'seconds' : 'days'] = $m[1];
	}
	}

	// find and remove existing date/regex/true rules
	foreach ((array) $vacation_tests as $idx => $t) {
	if ($t['test'] == 'currentdate' \|\| $t['test'] == 'true'
	\|\| ($t['test'] == 'header' && $t['type'] == 'regex' && $t['arg1'] == 'received')
	) {
	unset($vacation_tests[$idx]);
	}
	}

	if ($date_extension) {
	foreach (['start', 'end'] as $var) {
	if (!empty($data[$var])) {
	$dt = $data[$var];
	$vacation_tests[] = [
	'test' => 'currentdate',
	'part' => 'iso8601',
	'type' => 'value-' . ($var == 'start' ? 'ge' : 'le'),
	'zone' => $dt->format('O'),
	'arg' => str_replace('+00:00', 'Z', strtoupper($dt->format('c'))),
	];
	}
	}
	}
	else if ($regex_extension) {
	// Add date range rules if range specified
	if (!empty($data['start']) && !empty($data['end'])) {
	if ($tests = self::build_regexp_tests($data['start'], $data['end'], $error)) {
	$vacation_tests = array_merge($vacation_tests, $tests);
	}

	if ($error) {
	$this->error = "Invalid dates specified or unsupported period length";
	return false;
	}
	}
	}

	if ($data['action'] == 'redirect' \|\| $data['action'] == 'copy') {
	if (empty($data['target']) \|\| !rcube_utils::check_email($data['target'])) {
	$this->error = "Invalid address in action target: " . $data['target'];
	return false;
	}
	}
	else if ($data['action'] && $data['action'] != 'keep' && $data['action'] != 'discard') {
	$this->error = "Unsupported vacation action: " . $data['action'];
	return false;
	}

	if (empty($vacation_tests)) {
	$vacation_tests = (array) $this->rc->config->get('managesieve_vacation_test', [['test' => 'true']]);
	}

	$rule = $this->vacation;
	$rule['type'] = 'if';
	$rule['name'] = !empty($rule['name']) ? $rule['name'] : 'Out-of-Office';
	$rule['disabled'] = isset($data['enabled']) && !$data['enabled'];
	$rule['tests'] = $vacation_tests;
	$rule['join'] = $date_extension ? count($vacation_tests) > 1 : false;
	$rule['actions'] = [$vacation];

	if (!empty($data['action']) && $data['action'] != 'keep') {
	$rule['actions'][] = [
	'type' => $data['action'] == 'discard' ? 'discard' : 'redirect',
	'copy' => $data['action'] == 'copy',
	'target' => $data['action'] != 'discard' ? $data['target'] : '',
	];
	}

	return $this->merge_rule($rule, $this->vacation, $this->script_name);
	}

	/**
	* API: connect to managesieve server
	*/
	public function connect($username, $password)
	{
	$error = parent::connect($username, $password);

	if ($error) {
	return $error;
	}

	return $this->load_script();
	}

	/**
	* API: Returns last error
	*
	* @return string Error message
	*/
	public function get_error()
	{
	return $this->error;
	}
	}
	diff --git a/program/lib/Roundcube/rcube_ldap.php b/program/lib/Roundcube/rcube_ldap.php
	index 6c70137cd..37bef389f 100644
	--- a/program/lib/Roundcube/rcube_ldap.php
	+++ b/program/lib/Roundcube/rcube_ldap.php
	@@ -1,2276 +1,2283 @@
	<?php

	/**
	+-----------------------------------------------------------------------+
	\| This file is part of the Roundcube Webmail client \|
	\| \|
	\| Copyright (C) The Roundcube Dev Team \|
	\| Copyright (C) Kolab Systems AG \|
	\| \|
	\| Licensed under the GNU General Public License version 3 or \|
	\| any later version with exceptions for skins & plugins. \|
	\| See the README file for a full license statement. \|
	\| \|
	\| PURPOSE: \|
	\| Interface to an LDAP address directory \|
	+-----------------------------------------------------------------------+
	\| Author: Thomas Bruederli <roundcube@gmail.com> \|
	\| Andreas Dick <andudi (at) gmx (dot) ch> \|
	\| Aleksander Machniak <machniak@kolabsys.com> \|
	+-----------------------------------------------------------------------+
	*/

	/**
	* Model class to access an LDAP address directory
	*
	* @package Framework
	* @subpackage Addressbook
	*/
	class rcube_ldap extends rcube_addressbook
	{
	// public properties
	public $primary_key = 'ID';
	public $groups = false;
	public $readonly = true;
	public $ready = false;
	public $group_id = 0;
	public $coltypes = [];
	public $export_groups = false;

	// private properties
	protected $ldap;
	protected $formats = [];
	protected $prop = [];
	protected $fieldmap = [];
	protected $filter = '';
	protected $sub_filter;
	protected $result;
	protected $ldap_result;
	protected $mail_domain = '';
	protected $debug = false;

	/**
	* Group objectclass (lowercase) to member attribute mapping
	*
	* @var array
	*/
	private $group_types = [
	'group' => 'member',
	'groupofnames' => 'member',
	'kolabgroupofnames' => 'member',
	'groupofuniquenames' => 'uniqueMember',
	'kolabgroupofuniquenames' => 'uniqueMember',
	'univentiongroup' => 'uniqueMember',
	'groupofurls' => null,
	];

	private $base_dn = '';
	private $groups_base_dn = '';
	private $group_data;
	private $group_search_cache;
	private $cache;


	/**
	* Object constructor
	*
	* @param array $p LDAP connection properties
	* @param bool $debug Enables debug mode
	* @param string $mail_domain Current user mail domain name
	*/
	function __construct($p, $debug = false, $mail_domain = null)
	{
	$this->prop = $p;

	$fetch_attributes = ['objectClass'];

	// check if groups are configured
	if (!empty($p['groups']) && is_array($p['groups'])) {
	$this->groups = true;
	// set member field
	if (!empty($p['groups']['member_attr'])) {
	$this->prop['member_attr'] = strtolower($p['groups']['member_attr']);
	}
	else if (empty($p['member_attr'])) {
	$this->prop['member_attr'] = 'member';
	}
	// set default name attribute to cn
	if (empty($this->prop['groups']['name_attr'])) {
	$this->prop['groups']['name_attr'] = 'cn';
	}
	if (empty($this->prop['groups']['scope'])) {
	$this->prop['groups']['scope'] = 'sub';
	}
	// extend group objectclass => member attribute mapping
	if (!empty($this->prop['groups']['class_member_attr'])) {
	$this->group_types = array_merge($this->group_types, $this->prop['groups']['class_member_attr']);
	}

	// add group name attrib to the list of attributes to be fetched
	$fetch_attributes[] = $this->prop['groups']['name_attr'];
	}
	if (isset($p['group_filters']) && is_array($p['group_filters'])) {
	$this->groups = $this->groups \|\| count($p['group_filters']) > 0;

	foreach ($p['group_filters'] as $k => $group_filter) {
	// set default name attribute to cn
	if (empty($group_filter['name_attr']) && empty($this->prop['groups']['name_attr'])) {
	$this->prop['group_filters'][$k]['name_attr'] = $group_filter['name_attr'] = 'cn';
	}

	if (!empty($group_filter['name_attr'])) {
	$fetch_attributes[] = $group_filter['name_attr'];
	}
	}
	}

	// fieldmap property is given
	if (isset($p['fieldmap']) && is_array($p['fieldmap'])) {
	$p['fieldmap'] = array_filter($p['fieldmap']);
	foreach ($p['fieldmap'] as $rf => $lf) {
	$this->fieldmap[$rf] = $this->_attr_name($lf);
	}
	}
	else if (!empty($p)) {
	// read deprecated *_field properties to remain backwards compatible
	foreach ($p as $prop => $value) {
	if (!empty($value) && preg_match('/^(.+)_field$/', $prop, $matches)) {
	$this->fieldmap[$matches[1]] = $this->_attr_name($value);
	}
	}
	}

	// use fieldmap to advertise supported coltypes to the application
	foreach ($this->fieldmap as $colv => $lfv) {
	list($col, $type) = explode(':', $colv);
	$params = explode(':', $lfv);

	$lf = array_shift($params);
	$limit = 1;

	foreach ($params as $idx => $param) {
	// field format specification
	if (preg_match('/^(date)\[(.+)\]$/i', $param, $m)) {
	$this->formats[$lf] = ['type' => strtolower($m[1]), 'format' => $m[2]];
	}
	// first argument is a limit
	else if ($idx === 0) {
	if ($param == '*') $limit = null;
	else $limit = max(1, intval($param));
	}
	// second is a composite field separator
	else if ($idx === 1 && $param) {
	$this->coltypes[$col]['serialized'][$type] = $param;
	}
	}

	if (!is_array($this->coltypes[$col])) {
	$subtypes = $type ? [$type] : null;
	$this->coltypes[$col] = ['limit' => $limit, 'subtypes' => $subtypes, 'attributes' => [$lf]];
	}
	elseif ($type) {
	$this->coltypes[$col]['subtypes'][] = $type;
	$this->coltypes[$col]['attributes'][] = $lf;
	$this->coltypes[$col]['limit'] += $limit;
	}

	$this->fieldmap[$colv] = $lf;
	}

	// support for composite address
	if (!empty($this->coltypes['street']) && !empty($this->coltypes['locality'])) {
	$this->coltypes['address'] = [
	'limit' => max(1, $this->coltypes['locality']['limit'] + $this->coltypes['address']['limit']),
	'subtypes' => array_merge((array)$this->coltypes['address']['subtypes'], (array)$this->coltypes['locality']['subtypes']),
	'childs' => [],
	'attributes' => [],
	] + (array)$this->coltypes['address'];

	foreach (['street','locality','zipcode','region','country'] as $childcol) {
	if ($this->coltypes[$childcol]) {
	$this->coltypes['address']['childs'][$childcol] = ['type' => 'text'];
	$this->coltypes['address']['attributes'] = array_merge($this->coltypes['address']['attributes'], $this->coltypes[$childcol]['attributes']);
	unset($this->coltypes[$childcol]); // remove address child col from global coltypes list
	}
	}

	// at least one address type must be specified
	if (empty($this->coltypes['address']['subtypes'])) {
	$this->coltypes['address']['subtypes'] = ['home'];
	}
	}
	else if (!empty($this->coltypes['address'])) {
	$this->coltypes['address'] += ['type' => 'textarea', 'childs' => null, 'size' => 40];

	// 'serialized' means the UI has to present a composite address field
	if (!empty($this->coltypes['address']['serialized'])) {
	$childprop = ['type' => 'text'];
	$this->coltypes['address']['type'] = 'composite';
	$this->coltypes['address']['childs'] = [
	'street' => $childprop,
	'locality' => $childprop,
	'zipcode' => $childprop,
	'country' => $childprop
	];
	}
	}

	// make sure 'required_fields' is an array
	if (!isset($this->prop['required_fields'])) {
	$this->prop['required_fields'] = [];
	}
	else if (!is_array($this->prop['required_fields'])) {
	$this->prop['required_fields'] = (array) $this->prop['required_fields'];
	}

	// make sure LDAP_rdn field is required
	if (
	!empty($this->prop['LDAP_rdn'])
	&& !in_array($this->prop['LDAP_rdn'], $this->prop['required_fields'])
	&& !in_array($this->prop['LDAP_rdn'], array_keys((array)$this->prop['autovalues']))
	) {
	$this->prop['required_fields'][] = $this->prop['LDAP_rdn'];
	}

	foreach ($this->prop['required_fields'] as $key => $val) {
	$this->prop['required_fields'][$key] = $this->_attr_name($val);
	}

	// Build sub_fields filter
	if (!empty($this->prop['sub_fields']) && is_array($this->prop['sub_fields'])) {
	$this->sub_filter = '';
	foreach ($this->prop['sub_fields'] as $class) {
	if (!empty($class)) {
	$class = is_array($class) ? array_pop($class) : $class;
	$this->sub_filter .= '(objectClass=' . $class . ')';
	}
	}
	if (count($this->prop['sub_fields']) > 1) {
	$this->sub_filter = '(\|' . $this->sub_filter . ')';
	}
	}

	if (!empty($p['sort'])) {
	$this->sort_col = is_array($p['sort']) ? $p['sort'][0] : $p['sort'];
	}

	$this->debug = $debug;
	$this->mail_domain = $this->prop['mail_domain'] = $mail_domain;

	// initialize cache
	$rcube = rcube::get_instance();
	if ($cache_type = $rcube->config->get('ldap_cache', 'db')) {
	$cache_ttl = $rcube->config->get('ldap_cache_ttl', '10m');
	$cache_name = 'LDAP.' . (!empty($this->prop['name']) ? asciiwords($this->prop['name']) : 'unnamed');

	$this->cache = $rcube->get_cache($cache_name, $cache_type, $cache_ttl);
	}

	// determine which attributes to fetch
	$this->prop['list_attributes'] = array_unique($fetch_attributes);
	$this->prop['attributes'] = array_merge(array_values($this->fieldmap), $fetch_attributes);

	foreach ($rcube->config->get('contactlist_fields') as $col) {
	$this->prop['list_attributes'] = array_merge($this->prop['list_attributes'], $this->_map_field($col));
	}

	// initialize ldap wrapper object
	$this->ldap = new rcube_ldap_generic($this->prop);
	$this->ldap->config_set(['cache' => $this->cache, 'debug' => $this->debug]);

	$this->_connect();
	}

	/**
	* Establish a connection to the LDAP server
	*/
	private function _connect()
	{
	$rcube = rcube::get_instance();

	if ($this->ready) {
	return true;
	}

	if (empty($this->prop['hosts'])) {
	$this->prop['hosts'] = [];
	}

	// try to connect + bind for every host configured
	// with OpenLDAP 2.x ldap_connect() always succeeds but ldap_bind will fail if host isn't reachable
	// see http://www.php.net/manual/en/function.ldap-connect.php
	foreach ((array) $this->prop['hosts'] as $host) {
	// skip host if connection failed
	if (!$this->ldap->connect($host)) {
	continue;
	}

	// See if the directory is writeable.
	if (!empty($this->prop['writable'])) {
	$this->readonly = false;
	}

	// trigger post-connect hook
	$rcube = rcube::get_instance();
	$conf = $rcube->plugins->exec_hook('ldap_connected', $this->prop + ['host' => $host]);

	$bind_pass = $conf['bind_pass'];
	$bind_user = $conf['bind_user'];
	$bind_dn = $conf['bind_dn'];
	$auth_method = $conf['auth_method'];

	$this->base_dn = $conf['base_dn'];
	$this->groups_base_dn = $conf['groups']['base_dn'] ?: $this->base_dn;

	// User specific access, generate the proper values to use.
	if (!empty($conf['user_specific'])) {
	// No password set, use the session password
	if (empty($bind_pass)) {
	$bind_pass = $rcube->get_user_password();
	}

	// Get the pieces needed for variable replacement.
	if ($fu = ($rcube->get_user_email() ?: $conf['username'])) {
	list($u, $d) = explode('@', $fu);
	}
	else {
	$u = '';
	$d = $this->mail_domain;
	}

	$dc = 'dc='.strtr($d, ['.' => ',dc=']); // hierarchal domain string

	// resolve $dc through LDAP
	if (
	!empty($conf['domain_filter'])
	&& !empty($conf['search_bind_dn'])
	&& method_exists($this->ldap, 'domain_root_dn')
	) {
	$this->ldap->bind($conf['search_bind_dn'], $conf['search_bind_pw']);
	$dc = $this->ldap->domain_root_dn($d);
	}

	$replaces = ['%dn' => '', '%dc' => $dc, '%d' => $d, '%fu' => $fu, '%u' => $u];

	// Search for the dn to use to authenticate
	if (!empty($conf['search_base_dn']) && !empty($conf['search_filter'])
	&& (strstr($bind_dn, '%dn') \|\| strstr($this->base_dn, '%dn') \|\| strstr($this->groups_base_dn, '%dn'))
	) {
	$search_attribs = ['uid'];
	$search_bind_attrib = null;

	if (!empty($conf['search_bind_attrib'])) {
	$search_bind_attrib = (array) $conf['search_bind_attrib'];
	foreach ($search_bind_attrib as $r => $attr) {
	$search_attribs[] = $attr;
	$replaces[$r] = '';
	}
	}

	$search_bind_dn = strtr($conf['search_bind_dn'], $replaces);
	$search_base_dn = strtr($conf['search_base_dn'], $replaces);
	$search_filter = strtr($conf['search_filter'], $replaces);

	$cache_key = rcube_cache::key_name('DN', [$host, $search_bind_dn, $search_base_dn, $search_filter, $conf['search_bind_pw']]);

	if ($this->cache && ($dn = $this->cache->get($cache_key))) {
	$replaces['%dn'] = $dn;
	}
	else {
	$ldap = $this->ldap;
	if (!empty($search_bind_dn) && !empty($conf['search_bind_pw'])) {
	// To protect from "Critical extension is unavailable" error
	// we need to use a separate LDAP connection
	if (!empty($conf['vlv'])) {
	$ldap = new rcube_ldap_generic($conf);
	$ldap->config_set(['cache' => $this->cache, 'debug' => $this->debug]);
	if (!$ldap->connect($host)) {
	continue;
	}
	}

	if (!$ldap->bind($search_bind_dn, $conf['search_bind_pw'])) {
	continue; // bind failed, try next host
	}
	}

	$res = $ldap->search($search_base_dn, $search_filter, 'sub', $search_attribs);
	if ($res) {
	$res->rewind();
	$replaces['%dn'] = key($res->entries(true));

	// add more replacements from 'search_bind_attrib' config
	if (!empty($search_bind_attrib)) {
	$res = $res->current();
	foreach ($search_bind_attrib as $r => $attr) {
	$replaces[$r] = $res[$attr][0];
	}
	}
	}

	if ($ldap != $this->ldap) {
	$ldap->close();
	}
	}

	// DN not found
	if (empty($replaces['%dn'])) {
	if (!empty($conf['search_dn_default'])) {
	$replaces['%dn'] = $conf['search_dn_default'];
	}
	else {
	rcube::raise_error([
	'code' => 100, 'type' => 'ldap',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "DN not found using LDAP search."
	], true
	);
	continue;
	}
	}

	if ($this->cache && !empty($replaces['%dn'])) {
	$this->cache->set($cache_key, $replaces['%dn']);
	}
	}

	// Replace the bind_dn and base_dn variables.
	$bind_dn = strtr($bind_dn, $replaces);
	$this->base_dn = strtr($this->base_dn, $replaces);
	$this->groups_base_dn = strtr($this->groups_base_dn, $replaces);

	// replace placeholders in filter settings
	if (!empty($conf['filter'])) {
	$this->prop['filter'] = strtr($conf['filter'], $replaces);
	}

	foreach (['base_dn', 'filter', 'member_filter'] as $k) {
	if (!empty($conf['groups'][$k])) {
	$this->prop['groups'][$k] = strtr($conf['groups'][$k], $replaces);
	}
	}

	if (!empty($conf['group_filters']) && is_array($conf['group_filters'])) {
	foreach ($conf['group_filters'] as $i => $gf) {
	if (!empty($gf['base_dn'])) {
	$this->prop['group_filters'][$i]['base_dn'] = strtr($gf['base_dn'], $replaces);
	}
	if (!empty($gf['filter'])) {
	$this->prop['group_filters'][$i]['filter'] = strtr($gf['filter'], $replaces);
	}
	}
	}

	if (empty($bind_user)) {
	$bind_user = $u;
	}
	}

	if (empty($bind_pass) && strcasecmp($auth_method, 'GSSAPI') != 0) {
	$this->ready = true;
	}
	else {
	if (!empty($conf['auth_cid'])) {
	$this->ready = $this->ldap->sasl_bind($conf['auth_cid'], $bind_pass, $bind_dn);
	}
	else if (!empty($bind_dn)) {
	$this->ready = $this->ldap->bind($bind_dn, $bind_pass);
	}
	else {
	$this->ready = $this->ldap->sasl_bind($bind_user, $bind_pass);
	}
	}

	// connection established, we're done here
	if ($this->ready) {
	break;
	}

	} // end foreach hosts

	if (!is_resource($this->ldap->conn)) {
	rcube::raise_error([
	'code' => 100, 'type' => 'ldap',
	'file' => __FILE__, 'line' => __LINE__,
	'message' => "Could not connect to any LDAP server"
	], true
	);

	return false;
	}

	return $this->ready;
	}

	/**
	* Close connection to LDAP server
	*/
	function close()
	{
	if ($this->ldap) {
	$this->ldap->close();
	}
	}

	/**
	* Returns address book name
	*
	* @return string Address book name
	*/
	function get_name()
	{
	return $this->prop['name'];
	}

	/**
	* Set internal list page
	*
	* @param number Page number to list
	*/
	function set_page($page)
	{
	$this->list_page = (int) $page;
	$this->ldap->set_vlv_page($this->list_page, $this->page_size);
	}

	/**
	* Set internal page size
	*
	* @param number Number of records to display on one page
	*/
	function set_pagesize($size)
	{
	$this->page_size = (int) $size;
	$this->ldap->set_vlv_page($this->list_page, $this->page_size);
	}

	/**
	* Set internal sort settings
	*
	* @param string $sort_col Sort column
	* @param string $sort_order Sort order
	*/
	function set_sort_order($sort_col, $sort_order = null)
	{
	if (!empty($this->coltypes[$sort_col]['attributes'])) {
	$this->sort_col = $this->coltypes[$sort_col]['attributes'][0];
	}
	}

	/**
	* Save a search string for future listings
	*
	* @param string $filter Filter string
	*/
	function set_search_set($filter)
	{
	$this->filter = $filter;
	}

	/**
	* Getter for saved search properties
	*
	* @return mixed Search properties used by this class
	*/
	function get_search_set()
	{
	return $this->filter;
	}

	/**
	* Reset all saved results and search parameters
	*/
	function reset()
	{
	$this->result = null;
	$this->ldap_result = null;
	$this->filter = '';
	}

	/**
	* List the current set of contact records
	*
	* @param array $cols List of cols to show
	* @param int $subset Only return this number of records
	* @param bool $nocount True to skip the count query (Not used)
	*
	* @return array Indexed list of contact records, each a hash array
	*/
	function list_records($cols = null, $subset = 0, $nocount = false)
	{
	if (!empty($this->prop['searchonly']) && empty($this->filter) && !$this->group_id) {
	$this->result = new rcube_result_set(0);
	$this->result->searchonly = true;

	return $this->result;
	}

	// fetch group members recursively
	if ($this->group_id && !empty($this->group_data['dn'])) {
	$entries = $this->list_group_members($this->group_data['dn']);

	// make list of entries unique and sort it
	$seen = [];
	foreach ($entries as $i => $rec) {
	if (!empty($seen[$rec['dn']])) {
	unset($entries[$i]);
	}
	$seen[$rec['dn']] = true;
	}
	usort($entries, [$this, '_entry_sort_cmp']);

	$entries['count'] = count($entries);
	$this->result = new rcube_result_set($entries['count'], ($this->list_page-1) * $this->page_size);
	}
	else {
	// exec LDAP search if no result resource is stored
	if ($this->ready && $this->ldap_result === null) {
	$this->ldap_result = $this->extended_search();
	}

	// count contacts for this user
	$this->result = $this->count();

	$entries = $this->ldap_result;
	} // end else

	// start and end of the page
	$start_row = $this->ldap->vlv_active ? 0 : $this->result->first;
	$start_row = $subset < 0 ? $start_row + $this->page_size + $subset : $start_row;
	$last_row = $this->result->first + $this->page_size;
	$last_row = $subset != 0 ? $start_row + abs($subset) : $last_row;

	// filter entries for this page
	for ($i = $start_row; $i < min($entries['count'], $last_row); $i++) {
	if (!empty($entries[$i])) {
	$this->result->add($this->_ldap2result($entries[$i]));
	}
	}

	return $this->result;
	}

	/**
	* Get all members of the given group
	*
	* @param string $dn Group DN
	* @param bool $count Count only
	* @param array $entries Group entries (if called recursively)
	*
	* @return array Accumulated group members
	*/
	function list_group_members($dn, $count = false, $entries = null)
	{
	$group_members = [];

	// fetch group object
	if (empty($entries)) {
	$attribs = array_merge(['dn', 'objectClass', 'memberURL'], array_values($this->group_types));
	$entries = $this->ldap->read_entries($dn, '(objectClass=*)', $attribs);
	if ($entries === false) {
	return $group_members;
	}
	}

	for ($i=0; $i < $entries['count']; $i++) {
	$entry = $entries[$i];
	$attrs = [];

	foreach ((array) $entry['objectclass'] as $objectclass) {
	if (($member_attr = $this->get_group_member_attr([$objectclass], ''))
	&& ($member_attr = strtolower($member_attr)) && !in_array($member_attr, $attrs)
	) {
	$members = $this->_list_group_members($dn, $entry, $member_attr, $count);
	$group_members = array_merge($group_members, $members);
	$attrs[] = $member_attr;
	}
	else if (!empty($entry['memberurl'])) {
	$members = $this->_list_group_memberurl($dn, $entry, $count);
	$group_members = array_merge($group_members, $members);
	}

	if (!empty($this->prop['sizelimit']) && count($group_members) > $this->prop['sizelimit']) {
	break 2;
	}
	}
	}

	return array_filter($group_members);
	}

	/**
	* Fetch members of the given group entry from server
	*
	* @param string $dn Group DN
	* @param array $entry Group entry
	* @param string $attr Member attribute to use
	* @param bool $count Count only
	*
	* @return array Accumulated group members
	*/
	private function _list_group_members($dn, $entry, $attr, $count)
	{
	// Use the member attributes to return an array of member ldap objects
	// NOTE that the member attribute is supposed to contain a DN
	$group_members = [];
	if (empty($entry[$attr])) {
	return $group_members;
	}

	// read these attributes for all members
	$attrib = $count ? ['dn', 'objectClass'] : $this->prop['list_attributes'];
	$attrib = array_merge($attrib, array_values($this->group_types));
	$attrib[] = 'memberURL';

	$filter = !empty($this->prop['groups']['member_filter']) ? $this->prop['groups']['member_filter'] : '(objectclass=*)';

	for ($i=0; $i < $entry[$attr]['count']; $i++) {
	if (empty($entry[$attr][$i])) {
	continue;
	}

	$members = $this->ldap->read_entries($entry[$attr][$i], $filter, $attrib);
	if ($members == false) {
	$members = [];
	}

	// for nested groups, call recursively
	$nested_group_members = $this->list_group_members($entry[$attr][$i], $count, $members);

	unset($members['count']);
	$group_members = array_merge($group_members, array_filter($members), $nested_group_members);
	}

	return $group_members;
	}

	/**
	* List members of group class groupOfUrls
	*
	* @param string $dn Group DN
	* @param array $entry Group entry
	* @param bool $count True if only used for counting
	*
	* @return array Accumulated group members
	*/
	private function _list_group_memberurl($dn, $entry, $count)
	{
	$group_members = [];

	for ($i = 0; $i < $entry['memberurl']['count']; $i++) {
	// extract components from url
	if (!preg_match('!ldap://[^/]/([^\?]+)\?\?(\w+)\?(.)$!', $entry['memberurl'][$i], $m)) {
	continue;
	}

	// add search filter if any
	$filter = $this->filter ? '(&(' . $m[3] . ')(' . $this->filter . '))' : $m[3];
	$attrs = $count ? ['dn', 'objectClass'] : $this->prop['list_attributes'];

	if ($result = $this->ldap->search($m[1], $filter, $m[2], $attrs, $this->group_data)) {
	$entries = $result->entries();
	for ($j = 0; $j < $entries['count']; $j++) {
	if ($this->is_group_entry($entries[$j]) && ($nested_group_members = $this->list_group_members($entries[$j]['dn'], $count))) {
	$group_members = array_merge($group_members, $nested_group_members);
	}
	else {
	$group_members[] = $entries[$j];
	}
	}
	}
	}

	return $group_members;
	}

	/**
	* Callback for sorting entries
	*/
	function _entry_sort_cmp($a, $b)
	{
	return strcmp($a[$this->sort_col][0], $b[$this->sort_col][0]);
	}

	/**
	* Search contacts
	*
	* @param mixed $fields The field name of array of field names to search in
	* @param mixed $value Search value (or array of values when $fields is array)
	* @param int $mode Matching mode. Sum of rcube_addressbook::SEARCH_*
	* @param bool $select True if results are requested, False if count only
	* @param bool $nocount (Not used)
	* @param array $required List of fields that cannot be empty
	*
	* @return rcube_result_set List of contact records
	*/
	function search($fields, $value, $mode = 0, $select = true, $nocount = false, $required = [])
	{
	$mode = intval($mode);

	// special treatment for ID-based search
	if ($fields == 'ID' \|\| $fields == $this->primary_key) {
	$ids = !is_array($value) ? explode(',', $value) : $value;
	$result = new rcube_result_set();
	foreach ($ids as $id) {
	if ($rec = $this->get_record($id, true)) {
	$result->add($rec);
	$result->count++;
	}
	}
	return $result;
	}

	$rcube = rcube::get_instance();

	$list_fields = $rcube->config->get('contactlist_fields');
	$fuzzy_search = intval(!empty($this->prop['fuzzy_search']) && !($mode & rcube_addressbook::SEARCH_STRICT));

	// use VLV pseudo-search for autocompletion
	if (!empty($this->prop['vlv_search']) && $this->ready
	&& implode(',', (array)$fields) == implode(',', $list_fields)
	) {
	$this->result = new rcube_result_set(0);

	$this->ldap->config_set('fuzzy_search', $fuzzy_search);

	$ldap_data = $this->ldap->search($this->base_dn, $this->prop['filter'], $this->prop['scope'], $this->prop['attributes'],
	['search' => $value /, 'sort' => $this->prop['sort'] /]);

	if ($ldap_data === false) {
	return $this->result;
	}

	// get all entries of this page and post-filter those that really match the query
	$search = mb_strtolower($value);
	foreach ($ldap_data as $entry) {
	$rec = $this->_ldap2result($entry);
	foreach ($fields as $f) {
	- foreach ((array)$rec[$f] as $val) {
	- if ($this->compare_search_value($f, $val, $search, $mode)) {
	- $this->result->add($rec);
	- $this->result->count++;
	- break 2;
	+ if (!empty($rec[$f])) {
	+ foreach ((array)$rec[$f] as $val) {
	+ if ($this->compare_search_value($f, $val, $search, $mode)) {
	+ $this->result->add($rec);
	+ $this->result->count++;
	+ break 2;
	+ }
	}
	}
	}
	}

	return $this->result;
	}

	// advanced per-attribute search
	if (is_array($value)) {
	// use AND operator for advanced searches
	$filter = '(&';

	// set wildcards
	$wp = $ws = '';
	if ($fuzzy_search) {
	$ws = '*';
	if (!($mode & rcube_addressbook::SEARCH_PREFIX)) {
	$wp = '*';
	}
	}

	foreach ((array) $fields as $idx => $field) {
	$val = $value[$idx];
	if (!strlen($val)) {
	continue;
	}
	if ($attrs = $this->_map_field($field)) {
	if (count($attrs) > 1) {
	$filter .= '(\|';
	}
	foreach ($attrs as $f) {
	$filter .= "($f=$wp" . rcube_ldap_generic::quote_string($val) . "$ws)";
	}
	if (count($attrs) > 1) {
	$filter .= ')';
	}
	}
	}

	$filter .= ')';
	}
	else {
	if ($fields == '*') {
	// search_fields are required for fulltext search
	if (empty($this->prop['search_fields'])) {
	$this->set_error(self::ERROR_SEARCH, 'nofulltextsearch');
	$this->result = new rcube_result_set();
	return $this->result;
	}
	$attributes = (array) $this->prop['search_fields'];
	}
	else {
	// map address book fields into ldap attributes
	$attributes = [];
	foreach ((array) $fields as $field) {
	if (!empty($this->coltypes[$field]) && !empty($this->coltypes[$field]['attributes'])) {
	$attributes = array_merge($attributes, (array) $this->coltypes[$field]['attributes']);
	}
	}
	}

	// compose a full-text-like search filter
	$filter = rcube_ldap_generic::fulltext_search_filter($value, $attributes, $mode & ~rcube_addressbook::SEARCH_GROUPS);
	}

	// add required (non empty) fields filter
	$req_filter = '';
	foreach ((array) $required as $field) {
	if (in_array($field, (array) $fields)) {
	// required field is already in search filter
	continue;
	}
	if ($attrs = $this->_map_field($field)) {
	if (count($attrs) > 1) {
	$req_filter .= '(\|';
	}
	foreach ($attrs as $f) {
	$req_filter .= "($f=*)";
	}
	if (count($attrs) > 1) {
	$req_filter .= ')';
	}
	}
	}

	if (!empty($req_filter)) {
	$filter = '(&' . $req_filter . $filter . ')';
	}

	// avoid double-wildcard if $value is empty
	$filter = preg_replace('/\+/', '', $filter);

	if ($mode & rcube_addressbook::SEARCH_GROUPS) {
	$filter = 'e:' . $filter;
	}

	// Reset the previous search result
	$this->reset();

	// set filter string and execute search
	$this->set_search_set($filter);

	if ($select) {
	$this->list_records();
	}
	else {
	$this->result = $this->count();
	}

	return $this->result;
	}

	/**
	* Count number of available contacts in database
	*
	* @return object rcube_result_set Resultset with values for 'count' and 'first'
	*/
	function count()
	{
	$count = 0;

	if (!empty($this->ldap_result)) {
	$count = $this->ldap_result['count'];
	}
	else if ($this->group_id && !empty($this->group_data['dn'])) {
	$count = count($this->list_group_members($this->group_data['dn'], true));
	}
	// We have a connection but no result set, attempt to get one.
	else if ($this->ready) {
	$count = $this->extended_search(true);
	}

	return new rcube_result_set($count, ($this->list_page-1) * $this->page_size);
	}

	/**
	* Wrapper on LDAP searches with group_filters support, which
	* allows searching for contacts AND groups.
	*
	* @param bool $count Return count instead of the records
	*
	* @return int\|array Count of records or the result array (with 'count' item)
	*/
	protected function extended_search($count = false)
	{
	$prop = $this->group_id ? $this->group_data : $this->prop;
	$base_dn = $this->group_id ? $prop['base_dn'] : $this->base_dn;
	$attrs = $count ? ['dn'] : $this->prop['attributes'];

	// Use global search filter
	if ($filter = $this->filter) {
	if ($filter[0] == 'e' && $filter[1] == ':') {
	$filter = substr($filter, 2);
	$is_extended_search = !$this->group_id;
	}

	$prop['filter'] = $filter;

	// add general filter to query
	if (!empty($this->prop['filter'])) {
	$prop['filter'] = '(&(' . preg_replace('/^$\|$$/', '', $this->prop['filter']) . ')' . $prop['filter'] . ')';
	}
	}

	$result = $this->ldap->search($base_dn, $prop['filter'], $prop['scope'], $attrs, $prop, $count);
	$result_count = 0;

	// we have a search result resource, get all entries
	if (!$count && $result) {
	$result_count = $result->count();
	$result = $result->entries();
	unset($result['count']);
	}

	// search for groups
	if (!empty($is_extended_search)
	&& !empty($this->prop['group_filters'])
	&& is_array($this->prop['group_filters'])
	&& !empty($this->prop['groups']['filter'])
	) {
	$filter = '(&(' . preg_replace('/^$\|$$/', '', $this->prop['groups']['filter']) . ')' . $filter . ')';

	// for groups we may use cn instead of displayname...
	if ($this->prop['fieldmap']['name'] != $this->prop['groups']['name_attr']) {
	$filter = str_replace(strtolower($this->prop['fieldmap']['name']) . '=', $this->prop['groups']['name_attr'] . '=', $filter);
	}

	$name_attr = $this->prop['groups']['name_attr'];
	$email_attr = $this->prop['groups']['email_attr'] ?: 'mail';
	$attrs = array_unique(['dn', 'objectClass', $name_attr, $email_attr]);

	$res = $this->ldap->search($this->groups_base_dn, $filter, $this->prop['groups']['scope'], $attrs, $prop, $count);

	if ($count && $res) {
	$result += $res;
	}
	else if (!$count && $res && ($res_count = $res->count())) {
	$res = $res->entries();
	unset($res['count']);
	$result = array_merge($result, $res);
	$result_count += $res_count;
	}
	}

	if (!$count && $result) {
	// sorting
	if ($this->sort_col && $prop['scope'] !== 'base' && !$this->ldap->vlv_active) {
	usort($result, [$this, '_entry_sort_cmp']);
	}

	$result['count'] = $result_count;
	}

	return $result;
	}

	/**
	* Return the last result set
	*
	* @return object rcube_result_set Current resultset or NULL if nothing selected yet
	*/
	function get_result()
	{
	return $this->result;
	}

	/**
	* Get a specific contact record
	*
	* @param mixed $dn Record identifier
	* @param bool $assoc Return as associative array
	*
	* @return mixed Hash array or rcube_result_set with all record fields
	*/
	function get_record($dn, $assoc = false)
	{
	$res = $this->result = null;

	if ($this->ready && $dn) {
	$dn = self::dn_decode($dn);

	if ($rec = $this->ldap->get_entry($dn, $this->prop['attributes'])) {
	$rec = array_change_key_case($rec, CASE_LOWER);
	}

	// Use ldap_list to get subentries like country (c) attribute (#1488123)
	if (!empty($rec) && $this->sub_filter) {
	if ($entries = $this->ldap->list_entries($dn, $this->sub_filter, array_keys($this->prop['sub_fields']))) {
	foreach ($entries as $entry) {
	$lrec = array_change_key_case($entry, CASE_LOWER);
	$rec = array_merge($lrec, $rec);
	}
	}
	}

	if (!empty($rec)) {
	// Add in the dn for the entry.
	$rec['dn'] = $dn;
	$res = $this->_ldap2result($rec);
	$this->result = new rcube_result_set(1);
	$this->result->add($res);
	}
	}

	return $assoc ? $res : $this->result;
	}

	/**
	* Returns the last error occurred (e.g. when updating/inserting failed)
	*
	* @return array Hash array with the following fields: type, message
	*/
	function get_error()
	{
	$err = $this->error;

	// check ldap connection for errors
	if (!$err && $this->ldap->get_error()) {
	$err = [self::ERROR_SEARCH, $this->ldap->get_error()];
	}

	return $err;
	}

	/**
	* Check the given data before saving.
	* If input not valid, the message to display can be fetched using get_error()
	*
	* @param array &$save_data Associative array with data to save
	* @param bool $autofix Try to fix/complete record automatically
	*
	* @return bool True if input is valid, False if not.
	*/
	public function validate(&$save_data, $autofix = false)
	{
	// validate e-mail addresses
	if (!parent::validate($save_data, $autofix)) {
	return false;
	}

	// check for name input
	if (empty($save_data['name'])) {
	$this->set_error(self::ERROR_VALIDATE, 'nonamewarning');
	return false;
	}

	// Verify that the required fields are set.
	$missing = [];
	$ldap_data = $this->_map_data($save_data);

	foreach ($this->prop['required_fields'] as $fld) {
	if (!isset($ldap_data[$fld]) \|\| $ldap_data[$fld] === '') {
	$missing[$fld] = 1;
	}
	}

	if (!empty($missing)) {
	// try to complete record automatically
	if ($autofix) {
	$sn_field = $this->fieldmap['surname'];
	$fn_field = $this->fieldmap['firstname'];
	$mail_field = $this->fieldmap['email'];

	// try to extract surname and firstname from displayname
	$name_parts = preg_split('/[\s,.]+/', $save_data['name']);

	if ($sn_field && $missing[$sn_field]) {
	$save_data['surname'] = array_pop($name_parts);
	unset($missing[$sn_field]);
	}

	if ($fn_field && $missing[$fn_field]) {
	$save_data['firstname'] = array_shift($name_parts);
	unset($missing[$fn_field]);
	}

	// try to fix missing e-mail, very often on import
	// from vCard we have email:other only defined
	if ($mail_field && $missing[$mail_field]) {
	$emails = $this->get_col_values('email', $save_data, true);
	if (!empty($emails) && ($email = array_first($emails))) {
	$save_data['email'] = $email;
	unset($missing[$mail_field]);
	}
	}
	}

	// TODO: generate message saying which fields are missing
	if (!empty($missing)) {
	$this->set_error(self::ERROR_VALIDATE, 'formincomplete');
	return false;
	}
	}

	return true;
	}

	/**
	* Create a new contact record
	*
	* @param array $save_cols Associative array with save data
	* Keys: Field name with optional section in the form FIELD:SECTION
	* Values: Field value. Can be either a string or an array of strings for multiple values
	* @param bool $check True to check for duplicates first
	*
	* @return mixed The created record ID on success, False on error
	*/
	function insert($save_cols, $check = false)
	{
	// Map out the column names to their LDAP ones to build the new entry.
	$newentry = $this->_map_data($save_cols);
	$newentry['objectClass'] = $this->prop['LDAP_Object_Classes'];

	// add automatically generated attributes
	$this->add_autovalues($newentry);

	// Verify that the required fields are set.
	$missing = null;
	foreach ($this->prop['required_fields'] as $fld) {
	if (!isset($newentry[$fld])) {
	$missing[] = $fld;
	}
	}

	// abort process if required fields are missing
	// TODO: generate message saying which fields are missing
	if ($missing) {
	$this->set_error(self::ERROR_VALIDATE, 'formincomplete');
	return false;
	}

	// Build the new entries DN.
	$dn = $this->prop['LDAP_rdn'].'='.rcube_ldap_generic::quote_string($newentry[$this->prop['LDAP_rdn']], true).','.$this->base_dn;

	// Remove attributes that need to be added separately (child objects)
	$xfields = [];
	if (!empty($this->prop['sub_fields']) && is_array($this->prop['sub_fields'])) {
	foreach (array_keys($this->prop['sub_fields']) as $xf) {
	if (!empty($newentry[$xf])) {
	$xfields[$xf] = $newentry[$xf];
	unset($newentry[$xf]);
	}
	}
	}

	if (!$this->ldap->add_entry($dn, $newentry)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}

	foreach ($xfields as $xidx => $xf) {
	$xdn = $xidx.'='.rcube_ldap_generic::quote_string($xf).','.$dn;
	$xf = [
	$xidx => $xf,
	'objectClass' => (array) $this->prop['sub_fields'][$xidx],
	];

	$this->ldap->add_entry($xdn, $xf);
	}

	$dn = self::dn_encode($dn);

	// add new contact to the selected group
	if ($this->group_id) {
	$this->add_to_group($this->group_id, $dn);
	}

	return $dn;
	}

	/**
	* Update a specific contact record
	*
	* @param mixed $id Record identifier
	* @param array $save_cols Hash array with save data
	*
	* @return bool True on success, False on error
	*/
	function update($id, $save_cols)
	{
	$record = $this->get_record($id, true);
	$newdata = [];
	$replacedata = [];
	$deletedata = [];
	$subdata = [];
	$subdeldata = [];
	$subnewdata = [];
	$ldap_data = $this->_map_data($save_cols);
	$old_data = $record['_raw_attrib'];

	// special handling of photo col
	if ($photo_fld = $this->fieldmap['photo']) {
	// undefined means keep old photo
	if (!array_key_exists('photo', $save_cols)) {
	$ldap_data[$photo_fld] = $record['photo'];
	}
	}

	foreach ($this->fieldmap as $fld) {
	if ($fld) {
	$val = $ldap_data[$fld];
	$old = $old_data[$fld];
	// remove empty array values
	if (is_array($val)) {
	$val = array_filter($val);
	}
	// $this->_map_data() result and _raw_attrib use different format
	// make sure comparing array with one element with a string works as expected
	if (is_array($old) && count($old) == 1 && !is_array($val)) {
	$old = array_pop($old);
	}
	if (is_array($val) && count($val) == 1 && !is_array($old)) {
	$val = array_pop($val);
	}
	// Subentries must be handled separately
	if (!empty($this->prop['sub_fields']) && isset($this->prop['sub_fields'][$fld])) {
	if ($old != $val) {
	if ($old !== null) {
	$subdeldata[$fld] = $old;
	}
	if ($val) {
	$subnewdata[$fld] = $val;
	}
	}
	else if ($old !== null) {
	$subdata[$fld] = $old;
	}
	continue;
	}

	// The field does exist compare it to the ldap record.
	if ($old != $val) {
	// Changed, but find out how.
	if ($old === null) {
	// Field was not set prior, need to add it.
	$newdata[$fld] = $val;
	}
	else if ($val == '') {
	// Field supplied is empty, verify that it is not required.
	if (!in_array($fld, $this->prop['required_fields'])) {
	// ...It is not, safe to clear.
	// #1488420: Workaround "ldap_mod_del(): Modify: Inappropriate matching in..."
	// jpegPhoto attribute require an array here. It looks to me that it works for other attribs too
	$deletedata[$fld] = [];
	//$deletedata[$fld] = $old_data[$fld];
	}
	}
	else {
	// The data was modified, save it out.
	$replacedata[$fld] = $val;
	}
	}
	}
	}

	// console($old_data, $ldap_data, '----', $newdata, $replacedata, $deletedata, '----', $subdata, $subnewdata, $subdeldata);

	$dn = self::dn_decode($id);

	// Update the entry as required.
	if (!empty($deletedata)) {
	// Delete the fields.
	if (!$this->ldap->mod_del($dn, $deletedata)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}
	}

	if (!empty($replacedata)) {
	// Handle RDN change
	if (!empty($replacedata[$this->prop['LDAP_rdn']])) {
	$newdn = $this->prop['LDAP_rdn'] . '='
	. rcube_ldap_generic::quote_string($replacedata[$this->prop['LDAP_rdn']], true)
	. ',' . $this->base_dn;

	if ($dn != $newdn) {
	$newrdn = $this->prop['LDAP_rdn'] . '='
	. rcube_ldap_generic::quote_string($replacedata[$this->prop['LDAP_rdn']], true);
	unset($replacedata[$this->prop['LDAP_rdn']]);
	}
	}
	// Replace the fields.
	if (!empty($replacedata)) {
	if (!$this->ldap->mod_replace($dn, $replacedata)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}
	}
	}

	// RDN change, we need to remove all sub-entries
	if (!empty($newrdn)) {
	$subdeldata = array_merge($subdeldata, $subdata);
	$subnewdata = array_merge($subnewdata, $subdata);
	}

	// remove sub-entries
	if (!empty($subdeldata)) {
	foreach ($subdeldata as $fld => $val) {
	$subdn = $fld.'='.rcube_ldap_generic::quote_string($val).','.$dn;
	if (!$this->ldap->delete_entry($subdn)) {
	return false;
	}
	}
	}

	if (!empty($newdata)) {
	// Add the fields.
	if (!$this->ldap->mod_add($dn, $newdata)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}
	}

	// Handle RDN change
	if (!empty($newrdn) && !empty($newdn)) {
	if (!$this->ldap->rename($dn, $newrdn, null, true)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}

	$dn = self::dn_encode($dn);
	$newdn = self::dn_encode($newdn);

	// change the group membership of the contact
	if ($this->groups) {
	$group_ids = $this->get_record_groups($dn);
	foreach (array_keys($group_ids) as $group_id) {
	$this->remove_from_group($group_id, $dn);
	$this->add_to_group($group_id, $newdn);
	}
	}

	$dn = self::dn_decode($newdn);
	}

	// add sub-entries
	if (!empty($subnewdata)) {
	foreach ($subnewdata as $fld => $val) {
	$subdn = $fld.'='.rcube_ldap_generic::quote_string($val).','.$dn;
	$xf = [
	$fld => $val,
	'objectClass' => (array) $this->prop['sub_fields'][$fld],
	];
	$this->ldap->add_entry($subdn, $xf);
	}
	}

	return isset($newdn) ? $newdn : true;
	}

	/**
	* Mark one or more contact records as deleted
	*
	* @param array $ids Record identifiers
	* @param bool $force Remove record(s) irreversible (unsupported)
	*
	* @return int\|bool Number of deleted records on success, False on error
	*/
	function delete($ids, $force = true)
	{
	if (!is_array($ids)) {
	// Not an array, break apart the encoded DNs.
	$ids = explode(',', $ids);
	}

	foreach ($ids as $id) {
	$dn = self::dn_decode($id);

	// Need to delete all sub-entries first
	if ($this->sub_filter) {
	if ($entries = $this->ldap->list_entries($dn, $this->sub_filter)) {
	foreach ($entries as $entry) {
	if (!$this->ldap->delete_entry($entry['dn'])) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}
	}
	}
	}

	// Delete the record.
	if (!$this->ldap->delete_entry($dn)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}

	// remove contact from all groups where he was a member
	if ($this->groups) {
	$dn = self::dn_encode($dn);
	$group_ids = $this->get_record_groups($dn);

	foreach (array_keys($group_ids) as $group_id) {
	$this->remove_from_group($group_id, $dn);
	}
	}
	}

	return count($ids);
	}

	/**
	* Remove all contact records
	*
	* @param bool $with_groups Delete also groups if enabled
	*/
	function delete_all($with_groups = false)
	{
	// searching for contact entries
	$dn_list = $this->ldap->list_entries($this->base_dn, $this->prop['filter'] ?: '(objectclass=*)');

	if (!empty($dn_list)) {
	foreach ($dn_list as $idx => $entry) {
	$dn_list[$idx] = self::dn_encode($entry['dn']);
	}
	$this->delete($dn_list);
	}

	if ($with_groups && $this->groups && ($groups = $this->_fetch_groups()) && count($groups)) {
	foreach ($groups as $group) {
	$this->ldap->delete_entry($group['dn']);
	}

	if ($this->cache) {
	$this->cache->remove('groups');
	}
	}
	}

	/**
	* Generate missing attributes as configured
	*
	* @param array &$attrs LDAP record attributes
	*/
	protected function add_autovalues(&$attrs)
	{
	if (empty($this->prop['autovalues'])) {
	return;
	}

	$attrvals = [];
	foreach ($attrs as $k => $v) {
	$attrvals['{'.$k.'}'] = is_array($v) ? $v[0] : $v;
	}

	foreach ((array) $this->prop['autovalues'] as $lf => $templ) {
	if (empty($attrs[$lf])) {
	if (strpos($templ, '(') !== false) {
	// replace {attr} placeholders with (escaped!) attribute values to be safely eval'd
	$code = preg_replace('/\{\w+\}/', '', strtr($templ, array_map('addslashes', $attrvals)));
	$res = false;

	try {
	$res = eval("return ($code);");
	}
	catch (ParseError $e) {
	// ignore
	}

	if ($res === false) {
	rcube::raise_error([
	'code' => 505, 'file' => __FILE__, 'line' => __LINE__,
	'message' => "Expression parse error on: ($code)"
	], true, false);
	continue;
	}

	$attrs[$lf] = $res;
	}
	else {
	// replace {attr} placeholders with concrete attribute values
	$attrs[$lf] = preg_replace('/\{\w+\}/', '', strtr($templ, $attrvals));
	}
	}
	}
	}

	/**
	* Converts LDAP entry into an array
	*/
	private function _ldap2result($rec)
	{
	$out = ['_type' => 'person'];
	$fieldmap = $this->fieldmap;

	if (!empty($rec['dn'])) {
	$out[$this->primary_key] = self::dn_encode($rec['dn']);
	}

	// determine record type
	if ($this->is_group_entry($rec)) {
	$out['_type'] = 'group';
	$out['readonly'] = true;
	$fieldmap['name'] = $this->group_data['name_attr'] ?: $this->prop['groups']['name_attr'];
	}

	// assign object type from object class mapping
	if (!empty($this->prop['class_type_map'])) {
	foreach (array_map('strtolower', (array)$rec['objectclass']) as $objcls) {
	if (!empty($this->prop['class_type_map'][$objcls])) {
	$out['_type'] = $this->prop['class_type_map'][$objcls];
	break;
	}
	}
	}

	foreach ($fieldmap as $rf => $lf) {
	// we might be dealing with normalized and non-normalized data
	$entry = $rec[$lf];
	if (!is_array($entry) \|\| !isset($entry['count'])) {
	$entry = (array) $entry;
	$entry['count'] = count($entry);
	}

	for ($i=0; $i < $entry['count']; $i++) {
	if (!($value = $entry[$i])) {
	continue;
	}

	list($col, $subtype) = explode(':', $rf);
	$out['_raw_attrib'][$lf][$i] = $value;

	if ($col == 'email' && $this->mail_domain && !strpos($value, '@')) {
	$out[$rf][] = sprintf('%s@%s', $value, $this->mail_domain);
	}
	else if (in_array($col, ['street', 'zipcode', 'locality', 'country', 'region'])) {
	$out['address' . ($subtype ? ':' : '') . $subtype][$i][$col] = $value;
	}
	else if ($col == 'address' && strpos($value, '$') !== false) {
	// address data is represented as string separated with $
	list($out[$rf][$i]['street'], $out[$rf][$i]['locality'], $out[$rf][$i]['zipcode'], $out[$rf][$i]['country']) = explode('$', $value);
	}
	else if ($entry['count'] > 1) {
	$out[$rf][] = $value;
	}
	else {
	$out[$rf] = $value;
	}
	}

	// Make sure name fields aren't arrays (#1488108)
	if (is_array($out[$rf]) && in_array($rf, ['name', 'surname', 'firstname', 'middlename', 'nickname'])) {
	$out[$rf] = $out['_raw_attrib'][$lf] = $out[$rf][0];
	}
	}

	return $out;
	}

	/**
	* Return LDAP attribute(s) for the given field
	*/
	private function _map_field($field)
	{
	if (isset($this->coltypes[$field]['attributes'])) {
	return (array) $this->coltypes[$field]['attributes'];
	}

	return [];
	}

	/**
	* Convert a record data set into LDAP field attributes
	*/
	private function _map_data($save_cols)
	{
	// flatten composite fields first
	foreach ($this->coltypes as $col => $colprop) {
	if (!empty($colprop['childs']) && is_array($colprop['childs'])) {
	foreach ($this->get_col_values($col, $save_cols, false) as $subtype => $childs) {
	$subtype = $subtype ? ':'.$subtype : '';
	foreach ($childs as $i => $child_values) {
	foreach ((array)$child_values as $childcol => $value) {
	$save_cols[$childcol.$subtype][$i] = $value;
	}
	}
	}
	}

	// if addresses are to be saved as serialized string, do so
	if (!empty($colprop['serialized']) && is_array($colprop['serialized'])) {
	foreach ($colprop['serialized'] as $subtype => $delim) {
	$key = $col.':'.$subtype;
	foreach ((array)$save_cols[$key] as $i => $val) {
	$values = [$val['street'], $val['locality'], $val['zipcode'], $val['country']];
	$save_cols[$key][$i] = count(array_filter($values)) ? implode($delim, $values) : null;
	}
	}
	}
	}

	$ldap_data = [];
	foreach ($this->fieldmap as $rf => $fld) {
	$val = $save_cols[$rf];

	// check for value in base field (e.g. email instead of email:foo)
	list($col, $subtype) = explode(':', $rf);
	if (!$val && !empty($save_cols[$col])) {
	$val = $save_cols[$col];
	unset($save_cols[$col]); // use this value only once
	}
	else if (!$val && !$subtype) {
	// extract values from subtype cols
	$val = $this->get_col_values($col, $save_cols, true);
	}

	if (is_array($val)) {
	$val = array_filter($val); // remove empty entries
	}

	if ($fld && $val) {
	// The field does exist, add it to the entry.
	$ldap_data[$fld] = $val;
	}
	}

	foreach ($this->formats as $fld => $format) {
	if (empty($ldap_data[$fld])) {
	continue;
	}

	switch ($format['type']) {
	case 'date':
	if ($dt = rcube_utils::anytodatetime($ldap_data[$fld])) {
	$ldap_data[$fld] = $dt->format($format['format']);
	}
	break;
	}
	}

	return $ldap_data;
	}

	/**
	* Returns unified attribute name (resolving aliases)
	*/
	private static function _attr_name($namev)
	{
	// list of known attribute aliases
	static $aliases = [
	'gn' => 'givenname',
	'rfc822mailbox' => 'email',
	'userid' => 'uid',
	'emailaddress' => 'email',
	'pkcs9email' => 'email',
	];

	list($name, $limit) = explode(':', $namev, 2);
	$suffix = $limit ? ':'.$limit : '';
	$name = strtolower($name);

	return (isset($aliases[$name]) ? $aliases[$name] : $name) . $suffix;
	}

	/**
	* Determines whether the given LDAP entry is a group record
	*/
	private function is_group_entry($entry)
	{
	+ if (empty($entry['objectclass'])) {
	+ return false;
	+ }
	+
	$classes = array_map('strtolower', (array)$entry['objectclass']);

	return count(array_intersect(array_keys($this->group_types), $classes)) > 0;
	}

	/**
	* Activate/deactivate debug mode
	*
	* @param bool $dbg True if LDAP commands should be logged
	*/
	function set_debug($dbg = true)
	{
	$this->debug = $dbg;

	if ($this->ldap) {
	$this->ldap->config_set('debug', $dbg);
	}
	}

	/**
	* Setter for the current group
	*
	* @param mixed $group_id Group identifier
	*/
	function set_group($group_id)
	{
	if ($group_id) {
	$this->group_id = $group_id;
	$this->group_data = $this->get_group_entry($group_id);
	}
	else {
	$this->group_id = 0;
	$this->group_data = null;
	}
	}

	/**
	* List all active contact groups of this source
	*
	* @param string $search Optional search string to match group name
	* @param int $mode Matching mode. Sum of rcube_addressbook::SEARCH_*
	*
	* @return array Indexed list of contact groups, each a hash array
	*/
	function list_groups($search = null, $mode = 0)
	{
	if (!$this->groups) {
	return [];
	}

	$group_cache = $this->_fetch_groups($search, $mode);
	$groups = [];

	if ($search) {
	foreach ($group_cache as $group) {
	if ($this->compare_search_value('name', $group['name'], mb_strtolower($search), $mode)) {
	$groups[] = $group;
	}
	}
	}
	else {
	$groups = $group_cache;
	}

	return array_values($groups);
	}

	/**
	* Fetch groups from server
	*/
	private function _fetch_groups($search = null, $mode = 0, $vlv_page = null)
	{
	// reset group search cache
	if ($search !== null && $vlv_page === null) {
	$this->group_search_cache = null;
	}
	// return in-memory cache from previous search results
	else if (is_array($this->group_search_cache) && $vlv_page === null) {
	return $this->group_search_cache;
	}

	// special case: list groups from 'group_filters' config
	if ($vlv_page === null && $search === null && !empty($this->prop['group_filters'])) {
	$groups = [];
	$rcube = rcube::get_instance();

	// list regular groups configuration as special filter
	if (!empty($this->prop['groups']['filter'])) {
	$id = '__groups__';
	$groups[$id] = ['ID' => $id, 'name' => $rcube->gettext('groups'), 'virtual' => true] + $this->prop['groups'];
	}

	foreach ($this->prop['group_filters'] as $id => $prop) {
	$groups[$id] = $prop + ['ID' => $id, 'name' => ucfirst($id), 'virtual' => true, 'base_dn' => $this->base_dn];
	}

	return $groups;
	}

	if ($this->cache && $search === null && $vlv_page === null && ($groups = $this->cache->get('groups')) !== null) {
	return $groups;
	}

	$base_dn = $this->groups_base_dn;
	$filter = $this->prop['groups']['filter'];
	$scope = $this->prop['groups']['scope'];
	$name_attr = $this->prop['groups']['name_attr'];
	$email_attr = $this->prop['groups']['email_attr'] ?: 'mail';
	$sort_attrs = (array) ($this->prop['groups']['sort'] ? $this->prop['groups']['sort'] : $name_attr);
	$sort_attr = $sort_attrs[0];
	$page_size = 200;

	$ldap = $this->ldap;

	// use vlv to list groups
	if (!empty($this->prop['groups']['vlv'])) {
	if (empty($this->prop['groups']['sort'])) {
	$this->prop['groups']['sort'] = $sort_attrs;
	}

	$ldap = clone $this->ldap;
	$ldap->config_set($this->prop['groups']);
	$ldap->set_vlv_page($vlv_page+1, $page_size);
	}

	$props = ['sort' => $this->prop['groups']['sort']];
	$attrs = array_unique(['dn', 'objectClass', $name_attr, $email_attr, $sort_attr]);

	// add search filter
	if ($search !== null) {
	// set wildcards
	$wp = $ws = '';
	if (!empty($this->prop['fuzzy_search']) && !($mode & rcube_addressbook::SEARCH_STRICT)) {
	$ws = '*';
	if (!($mode & rcube_addressbook::SEARCH_PREFIX)) {
	$wp = '*';
	}
	}
	$filter = "(&$filter($name_attr=$wp" . rcube_ldap_generic::quote_string($search) . "$ws))";
	$props['search'] = $wp . $search . $ws;
	}

	$ldap_data = $ldap->search($base_dn, $filter, $scope, $attrs, $props);

	if ($ldap_data === false) {
	return [];
	}

	$groups = [];
	$group_sortnames = [];
	$group_count = $ldap_data->count();

	foreach ($ldap_data as $entry) {
	// DN is mandatory
	if (empty($entry['dn'])) {
	$entry['dn'] = $ldap_data->get_dn();
	}

	$group_name = is_array($entry[$name_attr]) ? $entry[$name_attr][0] : $entry[$name_attr];
	$group_id = self::dn_encode($entry['dn']);

	$groups[$group_id]['ID'] = $group_id;
	$groups[$group_id]['dn'] = $entry['dn'];
	$groups[$group_id]['name'] = $group_name;
	$groups[$group_id]['member_attr'] = $this->get_group_member_attr($entry['objectclass']);

	// list email attributes of a group
	for ($j=0; $entry[$email_attr] && $j < $entry[$email_attr]['count']; $j++) {
	if (strpos($entry[$email_attr][$j], '@') > 0)
	$groups[$group_id]['email'][] = $entry[$email_attr][$j];
	}

	$group_sortnames[] = mb_strtolower($entry[$sort_attr][0]);
	}

	// recursive call can exit here
	if ($vlv_page > 0) {
	return $groups;
	}

	// call recursively until we have fetched all groups
	if (!empty($this->prop['groups']['vlv'])) {
	while ($group_count == $page_size) {
	$next_page = $this->_fetch_groups($search, $mode, ++$vlv_page);
	$groups = array_merge($groups, $next_page);
	$group_count = count($next_page);
	}
	}
	// when using VLV the list of groups is already sorted
	else {
	array_multisort($group_sortnames, SORT_ASC, SORT_STRING, $groups);
	}

	// cache this
	if ($this->cache && $search === null) {
	$this->cache->set('groups', $groups);
	}
	else if ($search !== null) {
	$this->group_search_cache = $groups;
	}

	return $groups;
	}

	/**
	* Fetch a group entry from LDAP and save in local cache
	*/
	private function get_group_entry($group_id)
	{
	$group_cache = $this->_fetch_groups();

	// add group record to cache if it isn't yet there
	if (!isset($group_cache[$group_id])) {
	$name_attr = $this->prop['groups']['name_attr'];
	$dn = self::dn_decode($group_id);
	$attrs = ['dn','objectClass','member','uniqueMember','memberURL',$name_attr,$this->fieldmap['email']];

	if ($list = $this->ldap->read_entries($dn, '(objectClass=*)', $attrs)) {
	$entry = $list[0];
	$group_name = is_array($entry[$name_attr]) ? $entry[$name_attr][0] : $entry[$name_attr];
	+ $classes = !empty($entry['objectclass']) ? $entry['objectclass'] : [];

	$group_cache[$group_id]['ID'] = $group_id;
	$group_cache[$group_id]['dn'] = $dn;
	$group_cache[$group_id]['name'] = $group_name;
	- $group_cache[$group_id]['member_attr'] = $this->get_group_member_attr($entry['objectclass']);
	+ $group_cache[$group_id]['member_attr'] = $this->get_group_member_attr($classes);
	}
	else {
	$group_cache[$group_id] = false;
	}

	if ($this->cache) {
	$this->cache->set('groups', $group_cache);
	}
	}

	return $group_cache[$group_id];
	}

	/**
	* Get group properties such as name and email address(es)
	*
	* @param string $group_id Group identifier
	*
	* @return array Group properties as hash array
	*/
	function get_group($group_id)
	{
	$group_data = $this->get_group_entry($group_id);
	unset($group_data['dn'], $group_data['member_attr']);

	return $group_data;
	}

	/**
	* Create a contact group with the given name
	*
	* @param string $group_name The group name
	*
	* @return mixed False on error, array with record props in success
	*/
	function create_group($group_name)
	{
	$new_dn = 'cn=' . rcube_ldap_generic::quote_string($group_name, true) . ',' . $this->groups_base_dn;
	$new_gid = self::dn_encode($new_dn);
	$member_attr = $this->get_group_member_attr();
	$name_attr = $this->prop['groups']['name_attr'] ?: 'cn';
	$new_entry = [
	'objectClass' => $this->prop['groups']['object_classes'],
	$name_attr => $group_name,
	$member_attr => '',
	];

	if (!$this->ldap->add_entry($new_dn, $new_entry)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}

	if ($this->cache) {
	$this->cache->remove('groups');
	}

	return ['id' => $new_gid, 'name' => $group_name];
	}

	/**
	* Delete the given group and all linked group members
	*
	* @param string $group_id Group identifier
	*
	* @return bool True on success, false if no data was changed
	*/
	function delete_group($group_id)
	{
	$group_cache = $this->_fetch_groups();
	$del_dn = $group_cache[$group_id]['dn'];

	if (!$this->ldap->delete_entry($del_dn)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}

	if ($this->cache) {
	unset($group_cache[$group_id]);
	$this->cache->set('groups', $group_cache);
	}

	return true;
	}

	/**
	* Rename a specific contact group
	*
	* @param string $group_id Group identifier
	* @param string $new_name New name to set for this group
	* @param string &$new_gid New group identifier (if changed, otherwise don't set)
	*
	* @return bool New name on success, false if no data was changed
	*/
	function rename_group($group_id, $new_name, &$new_gid)
	{
	$group_cache = $this->_fetch_groups();
	$old_dn = $group_cache[$group_id]['dn'];
	$new_rdn = "cn=" . rcube_ldap_generic::quote_string($new_name, true);
	$new_gid = self::dn_encode($new_rdn . ',' . $this->groups_base_dn);

	if (!$this->ldap->rename($old_dn, $new_rdn, null, true)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return false;
	}

	if ($this->cache) {
	$this->cache->remove('groups');
	}

	return $new_name;
	}

	/**
	* Add the given contact records the a certain group
	*
	* @param string $group_id Group identifier
	* @param array\|string $contact_ids List of contact identifiers to be added
	*
	* @return int Number of contacts added
	*/
	function add_to_group($group_id, $contact_ids)
	{
	$group_cache = $this->_fetch_groups();
	$member_attr = $group_cache[$group_id]['member_attr'];
	$group_dn = $group_cache[$group_id]['dn'];
	$new_attrs = [];

	if (!is_array($contact_ids)) {
	$contact_ids = explode(',', $contact_ids);
	}

	foreach ($contact_ids as $id) {
	$new_attrs[$member_attr][] = self::dn_decode($id);
	}

	if (!$this->ldap->mod_add($group_dn, $new_attrs)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return 0;
	}

	if ($this->cache) {
	$this->cache->remove('groups');
	}

	return count($new_attrs[$member_attr]);
	}

	/**
	* Remove the given contact records from a certain group
	*
	* @param string $group_id Group identifier
	* @param array\|string $contact_ids List of contact identifiers to be removed
	*
	* @return int Number of deleted group members
	*/
	function remove_from_group($group_id, $contact_ids)
	{
	$group_cache = $this->_fetch_groups();
	$member_attr = $group_cache[$group_id]['member_attr'];
	$group_dn = $group_cache[$group_id]['dn'];
	$del_attrs = [];

	if (!is_array($contact_ids)) {
	$contact_ids = explode(',', $contact_ids);
	}

	foreach ($contact_ids as $id) {
	$del_attrs[$member_attr][] = self::dn_decode($id);
	}

	if (!$this->ldap->mod_del($group_dn, $del_attrs)) {
	$this->set_error(self::ERROR_SAVING, 'errorsaving');
	return 0;
	}

	if ($this->cache) {
	$this->cache->remove('groups');
	}

	return count($del_attrs[$member_attr]);
	}

	/**
	* Get group assignments of a specific contact record
	*
	* @param mixed $contact_id Record identifier
	*
	* @return array List of assigned groups as ID=>Name pairs
	* @since 0.5-beta
	*/
	function get_record_groups($contact_id)
	{
	if (!$this->groups) {
	return [];
	}

	$base_dn = $this->groups_base_dn;
	$contact_dn = self::dn_decode($contact_id);
	$name_attr = $this->prop['groups']['name_attr'] ?: 'cn';
	$member_attr = $this->get_group_member_attr();
	$add_filter = '';

	if ($member_attr != 'member' && $member_attr != 'uniqueMember') {
	$add_filter = "($member_attr=$contact_dn)";
	}

	$filter = strtr("(\|(member=$contact_dn)(uniqueMember=$contact_dn)$add_filter)", ["\\" => "\\\\"]);

	$ldap_data = $this->ldap->search($base_dn, $filter, 'sub', ['dn', $name_attr]);

	if ($ldap_data === false) {
	return [];
	}

	$groups = [];
	foreach ($ldap_data as $entry) {
	if (empty($entry['dn'])) {
	$entry['dn'] = $ldap_data->get_dn();
	}

	$group_name = $entry[$name_attr][0];
	$group_id = self::dn_encode($entry['dn']);
	$groups[$group_id] = $group_name;
	}

	return $groups;
	}

	/**
	* Detects group member attribute name
	*/
	private function get_group_member_attr($object_classes = [], $default = 'member')
	{
	if (empty($object_classes)) {
	$object_classes = $this->prop['groups']['object_classes'];
	}

	if (!empty($object_classes)) {
	foreach ((array) $object_classes as $oc) {
	if (!empty($this->group_types[strtolower($oc)])) {
	return $this->group_types[strtolower($oc)];
	}
	}
	}

	if (!empty($this->prop['groups']['member_attr'])) {
	return $this->prop['groups']['member_attr'];
	}

	return $default;
	}

	/**
	* HTML-safe DN string encoding
	*
	* @param string $str DN string
	*
	* @return string Encoded HTML identifier string
	*/
	static function dn_encode($str)
	{
	// @TODO: to make output string shorter we could probably
	// remove dc=* items from it
	return rtrim(strtr(base64_encode($str), '+/', '-_'), '=');
	}

	/**
	* Decodes DN string encoded with _dn_encode()
	*
	* @param string $str Encoded HTML identifier string
	*
	* @return string DN string
	*/
	static function dn_decode($str)
	{
	$str = str_pad(strtr($str, '-_', '+/'), strlen($str) % 4, '=', STR_PAD_RIGHT);
	return base64_decode($str);
	}
	}

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