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<?php
declare(strict_types=1);
/**
* @copyright 2023 Anna Larch <anna.larch@gmx.net>
*
* @author Anna Larch <anna.larch@gmx.net>
*
* @license GNU AGPL version 3 or any later version
*
* 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/>.
*
*/
namespace OCA\DAV\CalDAV\Status;
use DateTimeImmutable;
use OC\Calendar\CalendarQuery;
use OCA\DAV\CalDAV\CalendarImpl;
use OCA\UserStatus\Service\StatusService as UserStatusService;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\Calendar\IManager;
use OCP\ICache;
use OCP\ICacheFactory;
use OCP\IUser as User;
use OCP\IUserManager;
use OCP\User\IAvailabilityCoordinator;
use OCP\UserStatus\IUserStatus;
use Psr\Log\LoggerInterface;
use Sabre\CalDAV\Xml\Property\ScheduleCalendarTransp;
class StatusService {
private ICache $cache;
public function __construct(private ITimeFactory $timeFactory,
private IManager $calendarManager,
private IUserManager $userManager,
private UserStatusService $userStatusService,
private IAvailabilityCoordinator $availabilityCoordinator,
private ICacheFactory $cacheFactory,
private LoggerInterface $logger) {
$this->cache = $cacheFactory->createLocal('CalendarStatusService');
}
public function processCalendarStatus(string $userId): void {
$user = $this->userManager->get($userId);
if($user === null) {
return;
}
$availability = $this->availabilityCoordinator->getCurrentOutOfOfficeData($user);
if($availability !== null && $this->availabilityCoordinator->isInEffect($availability)) {
$this->logger->debug('An Absence is in effect, skipping calendar status check', ['user' => $userId]);
return;
}
$calendarEvents = $this->cache->get($userId);
if($calendarEvents === null) {
$calendarEvents = $this->getCalendarEvents($user);
$this->cache->set($userId, $calendarEvents, 300);
}
if(empty($calendarEvents)) {
$this->userStatusService->revertUserStatus($userId, IUserStatus::MESSAGE_CALENDAR_BUSY);
$this->logger->debug('No calendar events found for status check', ['user' => $userId]);
return;
}
try {
$currentStatus = $this->userStatusService->findByUserId($userId);
// Was the status set by anything other than the calendar automation?
$userStatusTimestamp = $currentStatus->getIsUserDefined() && $currentStatus->getMessageId() !== IUserStatus::MESSAGE_CALENDAR_BUSY ? $currentStatus->getStatusTimestamp() : null;
} catch (DoesNotExistException) {
$userStatusTimestamp = null;
$currentStatus = null;
}
if($currentStatus !== null && $currentStatus->getMessageId() === IUserStatus::MESSAGE_CALL
|| $currentStatus !== null && $currentStatus->getStatus() === IUserStatus::DND
|| $currentStatus !== null && $currentStatus->getStatus() === IUserStatus::INVISIBLE) {
// We don't overwrite the call status, DND status or Invisible status
$this->logger->debug('Higher priority status detected, skipping calendar status change', ['user' => $userId]);
return;
}
// Filter events to see if we have any that apply to the calendar status
$applicableEvents = array_filter($calendarEvents, static function (array $calendarEvent) use ($userStatusTimestamp): bool {
if (empty($calendarEvent['objects'])) {
return false;
}
$component = $calendarEvent['objects'][0];
if (isset($component['X-NEXTCLOUD-OUT-OF-OFFICE'])) {
return false;
}
if (isset($component['DTSTART']) && $userStatusTimestamp !== null) {
/** @var DateTimeImmutable $dateTime */
$dateTime = $component['DTSTART'][0];
if($dateTime instanceof DateTimeImmutable && $userStatusTimestamp > $dateTime->getTimestamp()) {
return false;
}
}
// Ignore events that are transparent
if (isset($component['TRANSP']) && strcasecmp($component['TRANSP'][0], 'TRANSPARENT') === 0) {
return false;
}
return true;
});
if(empty($applicableEvents)) {
$this->userStatusService->revertUserStatus($userId, IUserStatus::MESSAGE_CALENDAR_BUSY);
$this->logger->debug('No status relevant events found, skipping calendar status change', ['user' => $userId]);
return;
}
// Only update the status if it's neccesary otherwise we mess up the timestamp
if($currentStatus === null || $currentStatus->getMessageId() !== IUserStatus::MESSAGE_CALENDAR_BUSY) {
// One event that fulfills all status conditions is enough
// 1. Not an OOO event
// 2. Current user status (that is not a calendar status) was not set after the start of this event
// 3. Event is not set to be transparent
$count = count($applicableEvents);
$this->logger->debug("Found $count applicable event(s), changing user status", ['user' => $userId]);
$this->userStatusService->setUserStatus(
$userId,
IUserStatus::AWAY,
IUserStatus::MESSAGE_CALENDAR_BUSY,
true
);
}
}
private function getCalendarEvents(User $user): array {
$calendars = $this->calendarManager->getCalendarsForPrincipal('principals/users/' . $user->getUID());
if(empty($calendars)) {
return [];
}
$query = $this->calendarManager->newQuery('principals/users/' . $user->getUID());
foreach ($calendars as $calendarObject) {
// We can only work with a calendar if it exposes its scheduling information
if (!$calendarObject instanceof CalendarImpl) {
continue;
}
$sct = $calendarObject->getSchedulingTransparency();
if ($sct !== null && ScheduleCalendarTransp::TRANSPARENT == strtolower($sct->getValue())) {
// If a calendar is marked as 'transparent', it means we must
// ignore it for free-busy purposes.
continue;
}
$query->addSearchCalendar($calendarObject->getUri());
}
$dtStart = DateTimeImmutable::createFromMutable($this->timeFactory->getDateTime());
$dtEnd = DateTimeImmutable::createFromMutable($this->timeFactory->getDateTime('+5 minutes'));
// Only query the calendars when there's any to search
if($query instanceof CalendarQuery && !empty($query->getCalendarUris())) {
// Query the next hour
$query->setTimerangeStart($dtStart);
$query->setTimerangeEnd($dtEnd);
return $this->calendarManager->searchForPrincipal($query);
}
return [];
}
}
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