mirror of https://github.com/nextcloud/calendar
94 lines
3.5 KiB
PHP
94 lines
3.5 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* @copyright 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
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*
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* @author 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace OCA\Calendar\Service\Appointments;
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use DateInterval;
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use DateTimeInterface;
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use OCA\Calendar\Db\AppointmentConfig;
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use OCP\Calendar\IManager;
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use Psr\Log\LoggerInterface;
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use function array_filter;
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class EventConflictFilter {
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/** @var IManager */
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private $calendarManager;
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private $logger;
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public function __construct(IManager $calendarManager,
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LoggerInterface $logger) {
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$this->calendarManager = $calendarManager;
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$this->logger = $logger;
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}
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/**
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* Filter appointment slots to those that do not conflict with existing calendar events
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*
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* @todo try to combine slots a bit to lower the number of calendar queries
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*
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* @param AppointmentConfig $config
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* @param Interval[] $slots
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*
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* @return Interval[]
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*/
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public function filter(AppointmentConfig $config, array $slots): array {
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$query = $this->calendarManager->newQuery($config->getPrincipalUri());
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foreach ($config->getCalendarFreebusyUrisAsArray() as $uri) {
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$query->addSearchCalendar($uri);
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}
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// Always check the target calendar for conflicts
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$query->addSearchCalendar($config->getTargetCalendarUri());
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$query->addType('VEVENT');
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$preparationDuration = DateInterval::createFromDateString($config->getPreparationDuration() . ' seconds');
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$followUpDuration = DateInterval::createFromDateString($config->getFollowupDuration() . ' seconds');
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return array_filter($slots, function (Interval $slot) use ($followUpDuration, $preparationDuration, $query, $config): bool {
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$query->setTimerangeStart($slot->getStartAsObject()->sub($preparationDuration));
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$query->setTimerangeEnd($slot->getEndAsObject()->add($followUpDuration));
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$events = $this->calendarManager->searchForPrincipal($query);
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$objects = array_filter($events, static function (array $event) {
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$isCancelled = ($event['objects'][0]['STATUS'][0] ?? null) === 'CANCELLED';
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$isFree = ($event['objects'][0]['TRANSP'][0] ?? null) === 'TRANSPARENT';
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return !$isCancelled && !$isFree;
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});
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$uids = array_map(static function ($object) {
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return $object['uid'];
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}, $objects);
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$this->logger->debug('Appointment config ' . $config->getToken() . ' is looking within {start} and {followup} in calendar {calendarUri}. Conflicting UIDs are {uids}', [
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'start' => $slot->getStartAsObject()->sub($preparationDuration)->format(DateTimeInterface::ATOM),
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'end' => $slot->getEndAsObject()->add($followUpDuration)->format(DateTimeInterface::ATOM),
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'calendarUri' => $config->getTargetCalendarUri(),
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'uids' => implode(' : ', $uids)
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]);
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// If there is at least one event at this time then the slot is taken
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return empty($objects);
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});
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}
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}
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