<?php
/**
* Managesieve Forward 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_forward extends rcube_sieve_engine
{
protected $error;
protected $script_name;
protected $forward = array();
function actions()
{
$error = $this->start('forward');
// find current forward rule
if (!$error) {
$this->forward_rule();
$this->forward_post();
}
$this->plugin->add_label('forward.saving');
$this->rc->output->add_handlers(array(
'forwardform' => array($this, 'forward_form'),
));
$this->rc->output->set_pagetitle($this->plugin->gettext('forward'));
$this->rc->output->send('managesieve.forward');
}
/**
* Find and load sieve script with/for forward 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 = array();
$this->script_name = false;
// first try the active script(s)...
if (!empty($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'])) {
if ($rule['actions'][0]['type'] == 'redirect') {
$this->script_name = $script;
return 0;
}
else if (empty($master) && $rule['actions'][0]['type'] == 'include') {
$included[] = $rule['actions'][0]['target'];
}
}
}
}
}
// ...else try scripts included in active script (not for KEP:14)
foreach ($included as $script) {
if ($this->sieve->load($script)) {
foreach ($this->sieve->script->as_array() as $rule) {
if (!empty($rule['actions']) && $rule['actions'][0]['type'] == 'redirect') {
$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'] == 'redirect') {
$this->script_name = $script;
return 0;
}
}
}
}
// none of the scripts contains existing forward rule
// use any (first) active or just existing script (in that order)
if (!empty($this->active)) {
$this->sieve->load($this->script_name = $this->active[0]);
}
else {
$this->sieve->load($this->script_name = $list[0]);
}
}
return $this->sieve->error();
}
private function forward_rule()
{
if ($this->script_name === false || $this->script_name === null || !$this->sieve->load($this->script_name)) {
return;
}
$list = array();
$active = in_array($this->script_name, $this->active);
// find (first) simple forward rule that can be expressed with the minimal settings
foreach ($this->script as $idx => $rule) {
if (empty($this->forward) && !empty($rule['actions']) && $rule['actions'][0]['type'] == 'redirect') {
$ignore_rule = false;
$target = null;
$stop_found = false;
foreach ($rule['actions'] as $act) {
if ($stop_found) {
// we might loose information if there rules after the stop
$ignore_rule = true;
}
if ($act['type'] == 'keep') {
$action = 'copy';
}
else if ($act['type'] == 'stop') {
// we might loose information if there rules after the stop
$stop_found = true;
}
else if ($act['type'] == 'discard') {
$action = 'redirect';
}
else if ($act['type'] == 'redirect') {
if (!empty($target)) {
// we cannot use this rule, because there are multiple targets
$ignore_rule = true;
}
else {
$action = $act['copy'] ? 'copy' : 'redirect';
$target = $act['target'];
}
}
else {
// we cannot use this rule, because there are unknown commands, and we don't want to overwrite them.
$ignore_rule = true;
}
}
if (count($rule['tests']) != 1 || $rule['tests'][0]['test'] != "true" || $rule['tests'][0]['not'] != null) {
// ignore rules that have special conditions
$ignore_rule = true;
}
if (!$ignore_rule) {
$this->forward = array_merge($rule['actions'][0], array(
'idx' => $idx,
'disabled' => $rule['disabled'] || !$active,
'name' => $rule['name'],
'tests' => $rule['tests'],
'action' => $action ?: 'keep',
'target' => $target,
));
}
}
else if ($active) {
$list[$idx] = $rule['name'];
}
}
$this->forward['list'] = $list;
}
private function forward_post()
{
if (empty($_POST)) {
return;
}
$status = rcube_utils::get_input_value('forward_status', rcube_utils::INPUT_POST);
$action = rcube_utils::get_input_value('forward_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);
$date_extension = in_array('date', $this->exts);
$forward_tests = (array) $this->forward['tests'];
if ($action == 'redirect' || $action == 'copy') {
if ($target_domain) {
$target .= '@' . $target_domain;
}
if (empty($target) || !rcube_utils::check_email($target)) {
$error = 'noemailwarning';
}
}
if (empty($forward_tests)) {
$forward_tests = (array) $this->rc->config->get('managesieve_forward_test', array(array('test' => 'true')));
}
if (!$error) {
$rule = $this->forward;
$rule['type'] = 'if';
$rule['name'] = $rule['name'] ?: $this->plugin->gettext('forward');
$rule['disabled'] = $status == 'off';
$rule['tests'] = $forward_tests;
$rule['join'] = $date_extension ? count($forward_tests) > 1 : false;
$rule['actions'] = array();
$rule['after'] = $after;
if ($action && $action != 'keep') {
$rule['actions'][] = array(
'type' => $action == 'discard' ? 'discard' : 'redirect',
'copy' => $action == 'copy',
'target' => $action != 'discard' ? $target : '',
);
}
if ($this->save_forward_script($rule)) {
$this->rc->output->show_message('managesieve.forwardsaved', 'confirmation');
$this->rc->output->send();
}
}
$this->rc->output->show_message($error ?: 'managesieve.saveerror', 'error');
$this->rc->output->send();
}
/**
* Independent forward form
*/
public function forward_form($attrib)
{
// build FORM tag
$form_id = $attrib['id'] ?: 'form';
$out = $this->rc->output->request_form(array(
'id' => $form_id,
'name' => $form_id,
'method' => 'post',
'task' => 'settings',
'action' => 'plugin.managesieve-forward',
'noclose' => true
) + $attrib);
// form elements
$status = new html_select(array('name' => 'forward_status', 'id' => 'forward_status'));
$action = new html_select(array('name' => 'forward_action', 'id' => 'forward_action'));
$status->add($this->plugin->gettext('forward.on'), 'on');
$status->add($this->plugin->gettext('forward.off'), 'off');
if (in_array('copy', $this->exts)) {
$action->add($this->plugin->gettext('forward.copy'), 'copy');
}
$action->add($this->plugin->gettext('forward.redirect'), 'redirect');
// force domain selection in redirect email input
$domains = (array) $this->rc->config->get('managesieve_domains');
$redirect = $this->forward['action'] == 'redirect' || $this->forward['action'] == 'copy';
if (!empty($domains)) {
sort($domains);
$domain_select = new html_select(array('name' => 'action_domain', 'id' => 'action_domain'));
$domain_select->add(array_combine($domains, $domains));
if ($redirect && $this->forward['target']) {
$parts = explode('@', $this->forward['target']);
if (!empty($parts)) {
$this->forward['domain'] = array_pop($parts);
$this->forward['target'] = implode('@', $parts);
}
}
}
// redirect target
$action_target = '<span id="action_target_span" class="input-group">'
. '<input type="text" name="action_target" id="action_target"'
. ' value="' .($redirect ? rcube::Q($this->forward['target'], 'strict', false) : '') . '"'
. (!empty($domains) ? ' size="20"' : ' size="35"') . '/>'
. (!empty($domains) ? ' <span class="input-group-prepend input-group-append"><span class="input-group-text">@</span></span> '
. $domain_select->show($this->forward['domain']) : '')
. '</span>';
// Message tab
$table = new html_table(array('cols' => 2));
$table->add('title', html::label('forward_action', $this->plugin->gettext('forward.action')));
$table->add('forward input-group input-group-combo', $action->show($this->forward['action']) . ' ' . $action_target);
$table->add('title', html::label('forward_status', $this->plugin->gettext('forward.status')));
$table->add(null, $status->show(!isset($this->forward['disabled']) || $this->forward['disabled'] ? 'off' : 'on'));
$out .= $table->show($attrib);
$out .= '</form>';
$this->rc->output->add_gui_object('sieveform', $form_id);
return $out;
}
/**
* Saves forward script (adding some variables)
*/
protected function save_forward_script($rule)
{
// if script does not exist create a new one
if ($this->script_name === null || $this->script_name === false) {
$this->script_name = $this->rc->config->get('managesieve_script_name');
if (empty($this->script_name)) {
$this->script_name = 'roundcube';
}
// use default script contents
if (!$this->rc->config->get('managesieve_kolab_master')) {
$script_file = $this->rc->config->get('managesieve_default');
if ($script_file && is_readable($script_file)) {
$content = file_get_contents($script_file);
}
}
// create and load script
if ($this->sieve->save_script($this->script_name, $content)) {
$this->sieve->load($this->script_name);
}
}
$script_active = in_array($this->script_name, $this->active);
// re-order rules if needed
if (isset($rule['after']) && $rule['after'] !== '') {
// reset original forward rule
if (isset($this->forward['idx'])) {
$this->script[$this->forward['idx']] = null;
}
// add at target position
if ($rule['after'] >= count($this->script) - 1) {
$this->script[] = $rule;
}
else {
$script = array();
foreach ($this->script as $idx => $r) {
if ($r) {
$script[] = $r;
}
if ($idx == $rule['after']) {
$script[] = $rule;
}
}
$this->script = $script;
}
$this->script = array_values(array_filter($this->script));
}
// update original forward rule if it exists
else if (isset($this->forward['idx'])) {
$this->script[$this->forward['idx']] = $rule;
}
// otherwise put forward rule on top
else {
array_unshift($this->script, $rule);
}
// if the script was not active, we need to de-activate
// all rules except the forward rule, but only if it is not disabled
if (!$script_active && !$rule['disabled']) {
foreach ($this->script as $idx => $r) {
if (empty($r['actions']) || $r['actions'][0]['type'] != 'forward') {
$this->script[$idx]['disabled'] = true;
}
}
}
if (!$this->sieve->script) {
return false;
}
$this->sieve->script->content = $this->script;
// save the script
$saved = $this->save_script($this->script_name);
// activate the script
if ($saved && !$script_active && !$rule['disabled']) {
$this->activate_script($this->script_name);
}
return $saved;
}
/**
* API: get forward rule
*
* @return array forward rule information
*/
public function get_forward()
{
$this->exts = $this->sieve->get_extensions();
$this->init_script();
$this->forward_rule();
$forward = array(
'supported' => $this->exts,
'enabled' => empty($this->forward['disabled']),
'action' => $this->forward['action'],
'target' => $this->forward['target'],
);
return $forward;
}
/**
* API: set forward rule
*
* @param array $forward forward rule information (see self::get_forward())
*
* @return bool True on success, False on failure
*/
public function set_forward($data)
{
$this->exts = $this->sieve->get_extensions();
$this->error = false;
$this->init_script();
$this->forward_rule();
$date_extension = in_array('date', $this->exts);
if ($data['action'] == 'redirect' || $data['action'] == 'copy') {
if (empty($data['target']) || !rcube_utils::check_email($data['target'])) {
$this->error = "Invalid address in action taget: " . $data['target'];
return false;
}
}
else if ($data['action']) {
$this->error = "Unsupported forward action: " . $data['action'];
return false;
}
if (empty($forward_tests)) {
$forward_tests = (array) $this->rc->config->get('managesieve_forward_test', array(array('test' => 'true')));
}
$rule = $this->forward;
$rule['type'] = 'if';
$rule['name'] = $rule['name'] ?: 'Out-of-Office';
$rule['disabled'] = isset($data['enabled']) && !$data['enabled'];
$rule['tests'] = $forward_tests;
$rule['join'] = $date_extension ? count($forward_tests) > 1 : false;
$rule['actions'] = array();
if ($data['action'] && $data['action'] != 'keep') {
$rule['actions'][] = array(
'type' => $data['action'] == 'discard' ? 'discard' : 'redirect',
'copy' => $data['action'] == 'copy',
'target' => $data['action'] != 'discard' ? $data['target'] : '',
);
}
return $this->save_forward_script($rule);
}
/**
* 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;
}
}
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