Viewing File: /usr/local/cpanel/base/3rdparty/roundcube/plugins/calendar/drivers/caldav/caldav_driver.php
<?php
/**
* CalDAV driver for the Calendar plugin.
*
* @author Aleksander Machniak <machniak@apheleia-it.ch>
*
* Copyright (C) 2012-2022, Apheleia IT AG <contact@apheleia-it.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
require_once(__DIR__ . '/../kolab/kolab_driver.php');
class caldav_driver extends kolab_driver
{
// features this backend supports
public $alarms = true;
public $attendees = true;
public $freebusy = true;
public $attachments = true;
public $undelete = false; // TODO
public $alarm_types = ['DISPLAY', 'AUDIO'];
public $categoriesimmutable = true;
protected $scheduling_properties = ['start', 'end', 'location'];
/**
* Default constructor
*/
public function __construct($cal)
{
$cal->require_plugin('libkolab');
// load helper classes *after* libkolab has been loaded (#3248)
require_once(__DIR__ . '/caldav_calendar.php');
// require_once(__DIR__ . '/kolab_user_calendar.php');
// require_once(__DIR__ . '/caldav_invitation_calendar.php');
$this->cal = $cal;
$this->rc = $cal->rc;
// Initialize the CalDAV storage
$url = $this->rc->config->get('calendar_caldav_server', 'http://localhost');
$this->storage = new kolab_storage_dav($url);
$this->cal->register_action('push-freebusy', [$this, 'push_freebusy']);
$this->cal->register_action('calendar-acl', [$this, 'calendar_acl']);
// $this->freebusy_trigger = $this->rc->config->get('calendar_freebusy_trigger', false);
if (!$this->rc->config->get('kolab_freebusy_server', false)) {
$this->freebusy = false;
}
// TODO: get configuration for the Bonnie API
// $this->bonnie_api = libkolab::get_bonnie_api();
}
/**
* Read available calendars from server
*/
protected function _read_calendars()
{
// already read sources
if (isset($this->calendars)) {
return $this->calendars;
}
// get all folders that support VEVENT, sorted by namespace/name
$folders = $this->storage->get_folders('event');
// + $this->storage->get_user_folders('event', true);
$this->calendars = [];
foreach ($folders as $folder) {
$calendar = $this->_to_calendar($folder);
if ($calendar->ready) {
$this->calendars[$calendar->id] = $calendar;
if ($calendar->editable) {
$this->has_writeable = true;
}
}
}
return $this->calendars;
}
/**
* Convert kolab_storage_folder into caldav_calendar
*/
protected function _to_calendar($folder)
{
if ($folder instanceof caldav_calendar) {
return $folder;
}
if ($folder instanceof kolab_storage_folder_user) {
$calendar = new kolab_user_calendar($folder, $this->cal);
$calendar->subscriptions = count($folder->children) > 0;
}
else {
$calendar = new caldav_calendar($folder, $this->cal);
}
return $calendar;
}
/**
* Get a list of available calendars from this source.
*
* @param int $filter Bitmask defining filter criterias
* @param object $tree Reference to hierarchical folder tree object
*
* @return array List of calendars
*/
public function list_calendars($filter = 0, &$tree = null)
{
$this->_read_calendars();
$folders = $this->filter_calendars($filter);
$calendars = [];
$prefs = $this->rc->config->get('kolab_calendars', []);
// include virtual folders for a full folder tree
/*
if (!is_null($tree)) {
$folders = $this->storage->folder_hierarchy($folders, $tree);
}
*/
$parents = array_keys($this->calendars);
foreach ($folders as $id => $cal) {
$parent_id = null;
/*
$path = explode('/', $cal->name);
// find parent
do {
array_pop($path);
$parent_id = $this->storage->folder_id(implode('/', $path));
}
while (count($path) > 1 && !in_array($parent_id, $parents));
// restore "real" parent ID
if ($parent_id && !in_array($parent_id, $parents)) {
$parent_id = $this->storage->folder_id($cal->get_parent());
}
$parents[] = $cal->id;
if ($cal->virtual) {
$calendars[$cal->id] = [
'id' => $cal->id,
'name' => $cal->get_name(),
'listname' => $cal->get_foldername(),
'editname' => $cal->get_foldername(),
'virtual' => true,
'editable' => false,
'group' => $cal->get_namespace(),
];
}
else {
*/
// additional folders may come from kolab_storage_dav::folder_hierarchy() above
// make sure we deal with caldav_calendar instances
$cal = $this->_to_calendar($cal);
$this->calendars[$cal->id] = $cal;
$is_user = ($cal instanceof caldav_user_calendar);
$calendars[$cal->id] = [
'id' => $cal->id,
'name' => $cal->get_name(),
'listname' => $cal->get_foldername(),
'editname' => $cal->get_foldername(),
'title' => '', // $cal->get_title(),
'color' => $cal->get_color(),
'editable' => $cal->editable,
'group' => $is_user ? 'other user' : $cal->get_namespace(),
'active' => !isset($prefs[$cal->id]['active']) || !empty($prefs[$cal->id]['active']),
'owner' => $cal->get_owner(),
'removable' => !$cal->default,
// extras to hide some elements in the UI
'subscriptions' => $cal->subscriptions,
'driver' => 'caldav',
];
if (!$is_user) {
$calendars[$cal->id] += [
'default' => $cal->default,
'rights' => $cal->rights,
'showalarms' => $cal->alarms,
'history' => !empty($this->bonnie_api),
'children' => true, // TODO: determine if that folder indeed has child folders
'parent' => $parent_id,
'subtype' => $cal->subtype,
'caldavurl' => '', // $cal->get_caldav_url(),
];
}
/*
}
*/
if ($cal->subscriptions) {
$calendars[$cal->id]['subscribed'] = $cal->is_subscribed();
}
}
/*
// list virtual calendars showing invitations
if ($this->rc->config->get('kolab_invitation_calendars') && !($filter & self::FILTER_INSERTABLE)) {
foreach ([self::INVITATIONS_CALENDAR_PENDING, self::INVITATIONS_CALENDAR_DECLINED] as $id) {
$cal = new caldav_invitation_calendar($id, $this->cal);
if (!($filter & self::FILTER_ACTIVE) || $cal->is_active()) {
$calendars[$id] = [
'id' => $cal->id,
'name' => $cal->get_name(),
'listname' => $cal->get_name(),
'editname' => $cal->get_foldername(),
'title' => $cal->get_title(),
'color' => $cal->get_color(),
'editable' => $cal->editable,
'rights' => $cal->rights,
'showalarms' => $cal->alarms,
'history' => !empty($this->bonnie_api),
'group' => 'x-invitations',
'default' => false,
'active' => $cal->is_active(),
'owner' => $cal->get_owner(),
'children' => false,
'counts' => $id == self::INVITATIONS_CALENDAR_PENDING,
];
if (is_object($tree)) {
$tree->children[] = $cal;
}
}
}
}
*/
// append the virtual birthdays calendar
if ($this->rc->config->get('calendar_contact_birthdays', false) && !($filter & self::FILTER_INSERTABLE)) {
$id = self::BIRTHDAY_CALENDAR_ID;
$prefs = $this->rc->config->get('kolab_calendars', []); // read local prefs
if (!($filter & self::FILTER_ACTIVE) || !empty($prefs[$id]['active'])) {
$calendars[$id] = [
'id' => $id,
'name' => $this->cal->gettext('birthdays'),
'listname' => $this->cal->gettext('birthdays'),
'color' => !empty($prefs[$id]['color']) ? $prefs[$id]['color'] : '87CEFA',
'active' => !empty($prefs[$id]['active']),
'showalarms' => (bool) $this->rc->config->get('calendar_birthdays_alarm_type'),
'group' => 'x-birthdays',
'editable' => false,
'default' => false,
'children' => false,
'history' => false,
];
}
}
return $calendars;
}
/**
* Get the caldav_calendar instance for the given calendar ID
*
* @param string Calendar identifier
*
* @return ?caldav_calendar Object nor null if calendar doesn't exist
*/
public function get_calendar($id)
{
$this->_read_calendars();
// create calendar object if necessary
if (empty($this->calendars[$id])) {
if (in_array($id, [self::INVITATIONS_CALENDAR_PENDING, self::INVITATIONS_CALENDAR_DECLINED])) {
return new caldav_invitation_calendar($id, $this->cal);
}
// for unsubscribed calendar folders
if ($id !== self::BIRTHDAY_CALENDAR_ID) {
$calendar = caldav_calendar::factory($id, $this->cal);
if ($calendar->ready) {
$this->calendars[$calendar->id] = $calendar;
}
}
}
return !empty($this->calendars[$id]) ? $this->calendars[$id] : null;
}
/**
* Create a new calendar assigned to the current user
*
* @param array Hash array with calendar properties
* name: Calendar name
* color: The color of the calendar
*
* @return mixed ID of the calendar on success, False on error
*/
public function create_calendar($prop)
{
$prop['type'] = 'event';
$prop['alarms'] = !empty($prop['showalarms']);
$id = $this->storage->folder_update($prop);
if ($id === false) {
return false;
}
$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', []);
$prefs['kolab_calendars'][$id]['active'] = true;
$this->rc->user->save_prefs($prefs);
return $id;
}
/**
* Update properties of an existing calendar
*
* @see calendar_driver::edit_calendar()
*/
public function edit_calendar($prop)
{
$id = $prop['id'];
if (!in_array($id, [self::BIRTHDAY_CALENDAR_ID, self::INVITATIONS_CALENDAR_PENDING, self::INVITATIONS_CALENDAR_DECLINED])) {
$prop['type'] = 'event';
$prop['alarms'] = !empty($prop['showalarms']);
return $this->storage->folder_update($prop) !== false;
}
// fallback to local prefs for special calendars
$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', []);
unset($prefs['kolab_calendars'][$id]['showalarms']);
if (isset($prop['showalarms']) && $id == self::BIRTHDAY_CALENDAR_ID) {
$prefs['calendar_birthdays_alarm_type'] = $prop['showalarms'] ? $this->alarm_types[0] : '';
}
else if (isset($prop['showalarms'])) {
$prefs['kolab_calendars'][$id]['showalarms'] = !empty($prop['showalarms']);
}
if (!empty($prefs['kolab_calendars'][$id])) {
$this->rc->user->save_prefs($prefs);
}
return true;
}
/**
* Set active/subscribed state of a calendar
*
* @see calendar_driver::subscribe_calendar()
*/
public function subscribe_calendar($prop)
{
if (empty($prop['id'])) {
return false;
}
// save state in local prefs
if (isset($prop['active'])) {
$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', []);
$prefs['kolab_calendars'][$prop['id']]['active'] = !empty($prop['active']);
$this->rc->user->save_prefs($prefs);
}
return true;
}
/**
* Delete the given calendar with all its contents
*
* @see calendar_driver::delete_calendar()
*/
public function delete_calendar($prop)
{
if (!empty($prop['id'])) {
if ($this->storage->folder_delete($prop['id'], 'event')) {
// remove folder from user prefs
$prefs['kolab_calendars'] = $this->rc->config->get('kolab_calendars', []);
if (isset($prefs['kolab_calendars'][$prop['id']])) {
unset($prefs['kolab_calendars'][$prop['id']]);
$this->rc->user->save_prefs($prefs);
}
return true;
}
}
return false;
}
/**
* Search for shared or otherwise not listed calendars the user has access
*
* @param string Search string
* @param string Section/source to search
*
* @return array List of calendars
*/
public function search_calendars($query, $source)
{
$this->calendars = [];
$this->search_more_results = false;
/*
// find unsubscribed IMAP folders that have "event" type
if ($source == 'folders') {
foreach ((array) $this->storage->search_folders('event', $query, ['other']) as $folder) {
$calendar = new kolab_calendar($folder->name, $this->cal);
$this->calendars[$calendar->id] = $calendar;
}
}
// find other user's virtual calendars
else if ($source == 'users') {
// we have slightly more space, so display twice the number
$limit = $this->rc->config->get('autocomplete_max', 15) * 2;
foreach ($this->storage->search_users($query, 0, [], $limit, $count) as $user) {
$calendar = new caldav_user_calendar($user, $this->cal);
$this->calendars[$calendar->id] = $calendar;
// search for calendar folders shared by this user
foreach ($this->storage->list_user_folders($user, 'event', false) as $foldername) {
$cal = new caldav_calendar($foldername, $this->cal);
$this->calendars[$cal->id] = $cal;
$calendar->subscriptions = true;
}
}
if ($count > $limit) {
$this->search_more_results = true;
}
}
// don't list the birthday calendar
$this->rc->config->set('calendar_contact_birthdays', false);
$this->rc->config->set('kolab_invitation_calendars', false);
*/
return $this->list_calendars();
}
/**
* Get events from source.
*
* @param int Event's new start (unix timestamp)
* @param int Event's new end (unix timestamp)
* @param string Search query (optional)
* @param mixed List of calendar IDs to load events from (either as array or comma-separated string)
* @param bool Include virtual events (optional)
* @param int Only list events modified since this time (unix timestamp)
*
* @return array A list of event records
*/
public function load_events($start, $end, $search = null, $calendars = null, $virtual = 1, $modifiedsince = null)
{
if ($calendars && is_string($calendars)) {
$calendars = explode(',', $calendars);
}
else if (!$calendars) {
$this->_read_calendars();
$calendars = array_keys($this->calendars);
}
$query = [];
$events = [];
$categories = [];
if ($modifiedsince) {
$query[] = ['changed', '>=', $modifiedsince];
}
foreach ($calendars as $cid) {
if ($storage = $this->get_calendar($cid)) {
$events = array_merge($events, $storage->list_events($start, $end, $search, $virtual, $query));
$categories += $storage->categories;
}
}
// add events from the address books birthday calendar
if (in_array(self::BIRTHDAY_CALENDAR_ID, $calendars)) {
$events = array_merge($events, $this->load_birthday_events($start, $end, $search, $modifiedsince));
}
// add new categories to user prefs
$old_categories = $this->rc->config->get('calendar_categories', $this->default_categories);
$newcats = array_udiff(
array_keys($categories),
array_keys($old_categories),
function($a, $b) { return strcasecmp($a, $b); }
);
if (!empty($newcats)) {
foreach ($newcats as $category) {
$old_categories[$category] = ''; // no color set yet
}
$this->rc->user->save_prefs(['calendar_categories' => $old_categories]);
}
array_walk($events, 'caldav_driver::to_rcube_event');
return $events;
}
/**
* Create instances of a recurring event
*
* @param array Hash array with event properties
* @param DateTime Start date of the recurrence window
* @param DateTime End date of the recurrence window
*
* @return array List of recurring event instances
*/
public function get_recurring_events($event, $start, $end = null)
{
$this->_read_calendars();
$storage = reset($this->calendars);
return $storage->get_recurring_events($event, $start, $end);
}
/**
*
*/
protected function get_recurrence_count($event, $dtstart)
{
// use libkolab to compute recurring events
$recurrence = libcalendaring::get_recurrence($event);
$count = 0;
while (($next_event = $recurrence->next_instance()) && $next_event['start'] <= $dtstart && $count < 1000) {
$count++;
}
return $count;
}
/**
* Determine whether the current change affects scheduling and reset attendee status accordingly
*/
protected function check_scheduling(&$event, $old, $update = true)
{
// skip this check when importing iCal/iTip events
if (isset($event['sequence']) || !empty($event['_method'])) {
return false;
}
// iterate through the list of properties considered 'significant' for scheduling
$reschedule = $this->is_rescheduling_needed($event, $old);
// reset all attendee status to needs-action (#4360)
if ($update && $reschedule && !empty($event['attendees'])) {
$is_organizer = false;
$emails = $this->cal->get_user_emails();
$attendees = $event['attendees'];
foreach ($attendees as $i => $attendee) {
if ($attendee['role'] == 'ORGANIZER'
&& !empty($attendee['email'])
&& in_array(strtolower($attendee['email']), $emails)
) {
$is_organizer = true;
}
else if ($attendee['role'] != 'ORGANIZER'
&& $attendee['role'] != 'NON-PARTICIPANT'
&& $attendee['status'] != 'DELEGATED'
) {
$attendees[$i]['status'] = 'NEEDS-ACTION';
$attendees[$i]['rsvp'] = true;
}
}
// update attendees only if I'm the organizer
if ($is_organizer || (!empty($event['organizer']) && in_array(strtolower($event['organizer']['email']), $emails))) {
$event['attendees'] = $attendees;
}
}
return $reschedule;
}
/**
* Identify changes considered relevant for scheduling
*
* @param array Hash array with NEW object properties
* @param array Hash array with OLD object properties
*
* @return bool True if changes affect scheduling, False otherwise
*/
protected function is_rescheduling_needed($object, $old = null)
{
$reschedule = false;
foreach ($this->scheduling_properties as $prop) {
$a = $old[$prop] ?? null;
$b = $object[$prop] ?? null;
if (!empty($object['allday'])
&& ($prop == 'start' || $prop == 'end')
&& $a instanceof DateTimeInterface
&& $b instanceof DateTimeInterface
) {
$a = $a->format('Y-m-d');
$b = $b->format('Y-m-d');
}
if ($prop == 'recurrence' && is_array($a) && is_array($b)) {
unset($a['EXCEPTIONS'], $b['EXCEPTIONS']);
$a = array_filter($a);
$b = array_filter($b);
// advanced rrule comparison: no rescheduling if series was shortened
if ($a['COUNT'] && $b['COUNT'] && $b['COUNT'] < $a['COUNT']) {
unset($a['COUNT'], $b['COUNT']);
}
else if ($a['UNTIL'] && $b['UNTIL'] && $b['UNTIL'] < $a['UNTIL']) {
unset($a['UNTIL'], $b['UNTIL']);
}
}
if ($a != $b) {
$reschedule = true;
break;
}
}
return $reschedule;
}
/**
* Callback function to produce driver-specific calendar create/edit form
*
* @param string Request action 'form-edit|form-new'
* @param array Calendar properties (e.g. id, color)
* @param array Edit form fields
*
* @return string HTML content of the form
*/
public function calendar_form($action, $calendar, $formfields)
{
$special_calendars = [
self::BIRTHDAY_CALENDAR_ID,
self::INVITATIONS_CALENDAR_PENDING,
self::INVITATIONS_CALENDAR_DECLINED
];
// show default dialog for birthday calendar
if (in_array($calendar['id'], $special_calendars)) {
if ($calendar['id'] != self::BIRTHDAY_CALENDAR_ID) {
unset($formfields['showalarms']);
}
// General tab
$form['props'] = [
'name' => $this->rc->gettext('properties'),
'fields' => $formfields,
];
return kolab_utils::folder_form($form, '', 'calendar');
}
$form['props'] = [
'name' => $this->rc->gettext('properties'),
'fields' => [
'location' => $formfields['name'],
'color' => $formfields['color'],
'alarms' => $formfields['showalarms'],
],
];
return kolab_utils::folder_form($form, '', 'calendar', [], true);
}
}
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