<commit_before><?php
/**
 * @copyright Copyright (c) 2016 <NAME> <<EMAIL>>
 *
 * @author <NAME> <<EMAIL>>
 *
 * @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\Activity\Provider;

use OCP\Activity\IEvent;
use OCP\Activity\IEventMerger;
use OCP\Activity\IManager;
use OCP\IGroupManager;
use OCP\IL10N;
use OCP\IURLGenerator;
use OCP\IUserManager;
use OCP\L10N\IFactory;

class Calendar extends Base {

	const SUBJECT_ADD = 'calendar_add';
	const SUBJECT_UPDATE = 'calendar_update';
	const SUBJECT_DELETE = 'calendar_delete';
	const SUBJECT_PUBLISH = 'calendar_publish';
	const SUBJECT_UNPUBLISH = 'calendar_unpublish';
	const SUBJECT_SHARE_USER = 'calendar_user_share';
	const SUBJECT_SHARE_GROUP = 'calendar_group_share';
	const SUBJECT_UNSHARE_USER = 'calendar_user_unshare';
	const SUBJECT_UNSHARE_GROUP = 'calendar_group_unshare';

	/** @var IFactory */
	protected $languageFactory;

	/** @var IL10N */
	protected $l;

	/** @var IURLGenerator */
	protected $url;

	/** @var IManager */
	protected $activityManager;

	/** @var IEventMerger */
	protected $eventMerger;

	/**
	 * @param IFactory $languageFactory
	 * @param IURLGenerator $url
	 * @param IManager $activityManager
	 * @param IUserManager $userManager
	 * @param IGroupManager $groupManager
	 * @param IEventMerger $eventMerger
	 */
	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IGroupManager $groupManager, IEventMerger $eventMerger) {
		parent::__construct($userManager, $groupManager);
		$this->languageFactory = $languageFactory;
		$this->url = $url;
		$this->activityManager = $activityManager;
		$this->eventMerger = $eventMerger;
	}

	/**
	 * @param string $language
	 * @param IEvent $event
	 * @param IEvent|null $previousEvent
	 * @return IEvent
	 * @throws \InvalidArgumentException
	 * @since 11.0.0
	 */
	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar') {
			throw new \InvalidArgumentException();
		}

		$this->l = $this->languageFactory->get('dav', $language);

		if ($this->activityManager->getRequirePNG()) {
			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/calendar-dark.png')));
		} else {
			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/calendar-dark.svg')));
		}

		if ($event->getSubject() === self::SUBJECT_ADD) {
			$subject = $this->l->t('{actor} created calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_ADD . '_self') {
			$subject = $this->l->t('You created calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_DELETE) {
			$subject = $this->l->t('{actor} deleted calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_DELETE . '_self') {
			$subject = $this->l->t('You deleted calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_UPDATE) {
			$subject = $this->l->t('{actor} updated calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_UPDATE . '_self') {
			$subject = $this->l->t('You updated calendar {calendar}');

		} else if ($event->getSubject() === self::SUBJECT_PUBLISH . '_self') {
			$subject = $this->l->t('You shared calendar {calendar} as public link');
		} else if ($event->getSubject() === self::SUBJECT_UNPUBLISH . '_self') {
			$subject = $this->l->t('You removed public link for calendar {calendar}');

		} else if ($event->getSubject() === self::SUBJECT_SHARE_USER) {
			$subject = $this->l->t('{actor} shared calendar {calendar} with you');
		} else if ($event->getSubject() === self::SUBJECT_SHARE_USER . '_you') {
			$subject = $this->l->t('You shared calendar {calendar} with {user}');
		} else if ($event->getSubject() === self::SUBJECT_SHARE_USER . '_by') {
			$subject = $this->l->t('{actor} shared calendar {calendar} with {user}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER) {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from you');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_you') {
			$subject = $this->l->t('You unshared calendar {calendar} from {user}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_by') {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from {user}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_self') {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from themselves');

		} else if ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_you') {
			$subject = $this->l->t('You shared calendar {calendar} with group {group}');
		} else if ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_by') {
			$subject = $this->l->t('{actor} shared calendar {calendar} with group {group}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_you') {
			$subject = $this->l->t('You unshared calendar {calendar} from group {group}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_by') {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from group {group}');
		} else {
			throw new \InvalidArgumentException();
		}

		$parsedParameters = $this->getParameters($event);
		$this->setSubjects($event, $subject, $parsedParameters);

		$event = $this->eventMerger->mergeEvents('calendar', $event, $previousEvent);

		if ($event->getChildEvent() === null) {
			if (isset($parsedParameters['user'])) {
				// Couldn't group by calendar, maybe we can group by users
				$event = $this->eventMerger->mergeEvents('user', $event, $previousEvent);
			} else if (isset($parsedParameters['group'])) {
				// Couldn't group by calendar, maybe we can group by groups
				$event = $this->eventMerger->mergeEvents('group', $event, $previousEvent);
			}
		}

		return $event;
	}

	/**
	 * @param IEvent $event
	 * @return array
	 */
	protected function getParameters(IEvent $event) {
		$subject = $event->getSubject();
		$parameters = $event->getSubjectParameters();

		// Nextcloud 13+
		if (isset($parameters['calendar'])) {
			switch ($subject) {
				case self::SUBJECT_ADD:
				case self::SUBJECT_ADD . '_self':
				case self::SUBJECT_DELETE:
				case self::SUBJECT_DELETE . '_self':
				case self::SUBJECT_UPDATE:
				case self::SUBJECT_UPDATE . '_self':
				case self::SUBJECT_SHARE_USER:
				case self::SUBJECT_UNSHARE_USER:
				case self::SUBJECT_UNSHARE_USER . '_self':
					return [
						'actor' => $this->generateUserParameter($parameters['actor']),
						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
					];
				case self::SUBJECT_SHARE_USER . '_you':
				case self::SUBJECT_UNSHARE_USER . '_you':
					return [
						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
						'user' => $this->generateUserParameter($parameters['user']),
					];
				case self::SUBJECT_SHARE_USER . '_by':
				case self::SUBJECT_UNSHARE_USER . '_by':
					return [<commit_msg>Correctly parse the subject parameters for link (un)shares of calendars<commit_after><?php
/**
 * @copyright Copyright (c) 2016 <NAME> <<EMAIL>>
 *
 * @author <NAME> <<EMAIL>>
 *
 * @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\Activity\Provider;

use OCP\Activity\IEvent;
use OCP\Activity\IEventMerger;
use OCP\Activity\IManager;
use OCP\IGroupManager;
use OCP\IL10N;
use OCP\IURLGenerator;
use OCP\IUserManager;
use OCP\L10N\IFactory;

class Calendar extends Base {

	const SUBJECT_ADD = 'calendar_add';
	const SUBJECT_UPDATE = 'calendar_update';
	const SUBJECT_DELETE = 'calendar_delete';
	const SUBJECT_PUBLISH = 'calendar_publish';
	const SUBJECT_UNPUBLISH = 'calendar_unpublish';
	const SUBJECT_SHARE_USER = 'calendar_user_share';
	const SUBJECT_SHARE_GROUP = 'calendar_group_share';
	const SUBJECT_UNSHARE_USER = 'calendar_user_unshare';
	const SUBJECT_UNSHARE_GROUP = 'calendar_group_unshare';

	/** @var IFactory */
	protected $languageFactory;

	/** @var IL10N */
	protected $l;

	/** @var IURLGenerator */
	protected $url;

	/** @var IManager */
	protected $activityManager;

	/** @var IEventMerger */
	protected $eventMerger;

	/**
	 * @param IFactory $languageFactory
	 * @param IURLGenerator $url
	 * @param IManager $activityManager
	 * @param IUserManager $userManager
	 * @param IGroupManager $groupManager
	 * @param IEventMerger $eventMerger
	 */
	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IGroupManager $groupManager, IEventMerger $eventMerger) {
		parent::__construct($userManager, $groupManager);
		$this->languageFactory = $languageFactory;
		$this->url = $url;
		$this->activityManager = $activityManager;
		$this->eventMerger = $eventMerger;
	}

	/**
	 * @param string $language
	 * @param IEvent $event
	 * @param IEvent|null $previousEvent
	 * @return IEvent
	 * @throws \InvalidArgumentException
	 * @since 11.0.0
	 */
	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar') {
			throw new \InvalidArgumentException();
		}

		$this->l = $this->languageFactory->get('dav', $language);

		if ($this->activityManager->getRequirePNG()) {
			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/calendar-dark.png')));
		} else {
			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/calendar-dark.svg')));
		}

		if ($event->getSubject() === self::SUBJECT_ADD) {
			$subject = $this->l->t('{actor} created calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_ADD . '_self') {
			$subject = $this->l->t('You created calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_DELETE) {
			$subject = $this->l->t('{actor} deleted calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_DELETE . '_self') {
			$subject = $this->l->t('You deleted calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_UPDATE) {
			$subject = $this->l->t('{actor} updated calendar {calendar}');
		} else if ($event->getSubject() === self::SUBJECT_UPDATE . '_self') {
			$subject = $this->l->t('You updated calendar {calendar}');

		} else if ($event->getSubject() === self::SUBJECT_PUBLISH . '_self') {
			$subject = $this->l->t('You shared calendar {calendar} as public link');
		} else if ($event->getSubject() === self::SUBJECT_UNPUBLISH . '_self') {
			$subject = $this->l->t('You removed public link for calendar {calendar}');

		} else if ($event->getSubject() === self::SUBJECT_SHARE_USER) {
			$subject = $this->l->t('{actor} shared calendar {calendar} with you');
		} else if ($event->getSubject() === self::SUBJECT_SHARE_USER . '_you') {
			$subject = $this->l->t('You shared calendar {calendar} with {user}');
		} else if ($event->getSubject() === self::SUBJECT_SHARE_USER . '_by') {
			$subject = $this->l->t('{actor} shared calendar {calendar} with {user}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER) {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from you');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_you') {
			$subject = $this->l->t('You unshared calendar {calendar} from {user}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_by') {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from {user}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_USER . '_self') {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from themselves');

		} else if ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_you') {
			$subject = $this->l->t('You shared calendar {calendar} with group {group}');
		} else if ($event->getSubject() === self::SUBJECT_SHARE_GROUP . '_by') {
			$subject = $this->l->t('{actor} shared calendar {calendar} with group {group}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_you') {
			$subject = $this->l->t('You unshared calendar {calendar} from group {group}');
		} else if ($event->getSubject() === self::SUBJECT_UNSHARE_GROUP . '_by') {
			$subject = $this->l->t('{actor} unshared calendar {calendar} from group {group}');
		} else {
			throw new \InvalidArgumentException();
		}

		$parsedParameters = $this->getParameters($event);
		$this->setSubjects($event, $subject, $parsedParameters);

		$event = $this->eventMerger->mergeEvents('calendar', $event, $previousEvent);

		if ($event->getChildEvent() === null) {
			if (isset($parsedParameters['user'])) {
				// Couldn't group by calendar, maybe we can group by users
				$event = $this->eventMerger->mergeEvents('user', $event, $previousEvent);
			} else if (isset($parsedParameters['group'])) {
				// Couldn't group by calendar, maybe we can group by groups
				$event = $this->eventMerger->mergeEvents('group', $event, $previousEvent);
			}
		}

		return $event;
	}

	/**
	 * @param IEvent $event
	 * @return array
	 */
	protected function getParameters(IEvent $event) {
		$subject = $event->getSubject();
		$parameters = $event->getSubjectParameters();

		// Nextcloud 13+
		if (isset($parameters['calendar'])) {
			switch ($subject) {
				case self::SUBJECT_ADD:
				case self::SUBJECT_ADD . '_self':
				case self::SUBJECT_DELETE:
				case self::SUBJECT_DELETE . '_self':
				case self::SUBJECT_UPDATE:
				case self::SUBJECT_UPDATE . '_self':
				case self::SUBJECT_PUBLISH . '_self':
				case self::SUBJECT_UNPUBLISH . '_self':
				case self::SUBJECT_SHARE_USER:
				case self::SUBJECT_UNSHARE_USER:
				case self::SUBJECT_UNSHARE_USER . '_self':
					return [
						'actor' => $this->generateUserParameter($parameters['actor']),
						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
					];
				case self::SUBJECT_SHARE_USER . '_you':
				case self::SUBJECT_UNSHARE_USER . '_you':
					return [
						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
						'user' => $this->generateUserParameter($parameters['user']),
					];
				case self::SUBJECT_SHARE_USER . '_by':
				case self::SUBJECT_UNSHARE_USER . '_by':
					return [
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