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-rw-r--r--apps/dav/lib/CalDAV/Activity/Backend.php396
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diff --git a/apps/dav/lib/CalDAV/Activity/Backend.php b/apps/dav/lib/CalDAV/Activity/Backend.php
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+<?php
+/**
+ * @copyright Copyright (c) 2016 Joas Schilling <coding@schilljs.com>
+ *
+ * @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;
+
+
+use OCA\DAV\CalDAV\CalDavBackend;
+use OCA\DAV\CalDAV\Calendar;
+use OCP\Activity\IEvent;
+use OCP\Activity\IManager as IActivityManager;
+use OCP\IGroup;
+use OCP\IGroupManager;
+use OCP\IUser;
+use OCP\IUserSession;
+
+/**
+ * Class Backend
+ *
+ * @package OCA\DAV\CalDAV\Activity
+ */
+class Backend {
+
+ /** @var CalDavBackend */
+ protected $calDavBackend;
+
+ /** @var IActivityManager */
+ protected $activityManager;
+
+ /** @var IGroupManager */
+ protected $groupManager;
+
+ /** @var IUserSession */
+ protected $userSession;
+
+ /**
+ * @param CalDavBackend $calDavBackend
+ * @param IActivityManager $activityManager
+ * @param IGroupManager $groupManager
+ * @param IUserSession $userSession
+ */
+ public function __construct(CalDavBackend $calDavBackend, IActivityManager $activityManager, IGroupManager $groupManager, IUserSession $userSession) {
+ $this->calDavBackend = $calDavBackend;
+ $this->activityManager = $activityManager;
+ $this->groupManager = $groupManager;
+ $this->userSession = $userSession;
+ }
+
+ /**
+ * Creates activities when a calendar was creates
+ *
+ * @param int $calendarId
+ * @param array $properties
+ */
+ public function addCalendar($calendarId, array $properties) {
+ $this->triggerActivity(Extension::SUBJECT_ADD, $calendarId, $properties);
+ }
+
+ /**
+ * Creates activities when a calendar was updated
+ *
+ * @param int $calendarId
+ * @param array $properties
+ */
+ public function updateCalendar($calendarId, array $properties) {
+ $this->triggerActivity(Extension::SUBJECT_UPDATE, $calendarId, $properties);
+ }
+
+ /**
+ * Creates activities when a calendar was deleted
+ *
+ * @param int $calendarId
+ */
+ public function deleteCalendar($calendarId) {
+ $this->triggerActivity(Extension::SUBJECT_DELETE, $calendarId);
+ }
+
+
+ /**
+ * Creates activities for all related users when a calendar was touched
+ *
+ * @param string $action
+ * @param int $calendarId
+ * @param array $changedProperties
+ */
+ protected function triggerActivity($action, $calendarId, array $changedProperties = []) {
+ $properties = $this->calDavBackend->getCalendarById($calendarId);
+ if (!isset($properties['principaluri'])) {
+ return;
+ }
+
+ $principal = explode('/', $properties['principaluri']);
+ $owner = $principal[2];
+
+ $currentUser = $this->userSession->getUser();
+ if ($currentUser instanceof IUser) {
+ $currentUser = $currentUser->getUID();
+ } else {
+ $currentUser = $owner;
+ }
+
+ $event = $this->activityManager->generateEvent();
+ $event->setApp('dav')
+ ->setObject(Extension::CALENDAR, $calendarId)
+ ->setType(Extension::CALENDAR)
+ ->setAuthor($currentUser);
+
+ $changedVisibleInformation = array_intersect([
+ '{DAV:}displayname',
+ '{http://apple.com/ns/ical/}calendar-color'
+ ], array_keys($changedProperties));
+
+ if ($action === Extension::SUBJECT_UPDATE && empty($changedVisibleInformation)) {
+ $users = [$owner];
+ } else {
+ $users = $this->getUsersForCalendar($calendarId);
+ $users[] = $owner;
+ }
+
+ foreach ($users as $user) {
+ $event->setAffectedUser($user)
+ ->setSubject(
+ $user === $currentUser ? $action . '_self' : $action,
+ [
+ $currentUser,
+ $properties['{DAV:}displayname'],
+ ]
+ );
+ $this->activityManager->publish($event);
+ }
+ }
+
+ /**
+ * Creates activities for all related users when a calendar was (un-)shared
+ *
+ * @param Calendar $calendar
+ * @param array $add
+ * @param array $remove
+ */
+ public function updateCalendarShares(Calendar $calendar, array $add, array $remove) {
+ $calendarId = $calendar->getResourceId();
+ $shares = $this->calDavBackend->getShares($calendarId);
+
+ $properties = $this->calDavBackend->getCalendarById($calendarId);
+ $principal = explode('/', $properties['principaluri']);
+ $owner = $principal[2];
+
+ $currentUser = $this->userSession->getUser();
+ if ($currentUser instanceof IUser) {
+ $currentUser = $currentUser->getUID();
+ } else {
+ $currentUser = $owner;
+ }
+
+ $event = $this->activityManager->generateEvent();
+ $event->setApp('dav')
+ ->setObject(Extension::CALENDAR, $calendarId)
+ ->setType(Extension::CALENDAR)
+ ->setAuthor($currentUser);
+
+ foreach ($remove as $principal) {
+ // principal:principals/users/test
+ $parts = explode(':', $principal, 2);
+ if ($parts[0] !== 'principal') {
+ continue;
+ }
+ $principal = explode('/', $parts[1]);
+
+ if ($principal[1] === 'users') {
+ $this->triggerActivityUser(
+ $principal[2],
+ $event,
+ $properties,
+ Extension::SUBJECT_UNSHARE_USER,
+ Extension::SUBJECT_DELETE . '_self'
+ );
+
+ if ($owner !== $principal[2]) {
+ $parameters = [
+ $principal[2],
+ $properties['{DAV:}displayname'],
+ ];
+
+ if ($owner === $event->getAuthor()) {
+ $subject = Extension::SUBJECT_UNSHARE_USER . '_you';
+ } else if ($principal[2] === $event->getAuthor()) {
+ $subject = Extension::SUBJECT_UNSHARE_USER . '_self';
+ } else {
+ $event->setAffectedUser($event->getAuthor())
+ ->setSubject(Extension::SUBJECT_UNSHARE_USER . '_you', $parameters);
+ $this->activityManager->publish($event);
+
+ $subject = Extension::SUBJECT_UNSHARE_USER . '_by';
+ $parameters[] = $event->getAuthor();
+ }
+
+ $event->setAffectedUser($owner)
+ ->setSubject($subject, $parameters);
+ $this->activityManager->publish($event);
+ }
+ } else if ($principal[1] === 'groups') {
+ $this->triggerActivityGroup($principal[2], $event, $properties, Extension::SUBJECT_UNSHARE_USER);
+
+ $parameters = [
+ $principal[2],
+ $properties['{DAV:}displayname'],
+ ];
+
+ if ($owner === $event->getAuthor()) {
+ $subject = Extension::SUBJECT_UNSHARE_GROUP . '_you';
+ } else {
+ $event->setAffectedUser($event->getAuthor())
+ ->setSubject(Extension::SUBJECT_UNSHARE_GROUP . '_you', $parameters);
+ $this->activityManager->publish($event);
+
+ $subject = Extension::SUBJECT_UNSHARE_GROUP . '_by';
+ $parameters[] = $event->getAuthor();
+ }
+
+ $event->setAffectedUser($owner)
+ ->setSubject($subject, $parameters);
+ $this->activityManager->publish($event);
+ }
+ }
+
+ foreach ($add as $share) {
+ if ($this->isAlreadyShared($share['href'], $shares)) {
+ continue;
+ }
+
+ // principal:principals/users/test
+ $parts = explode(':', $share['href'], 2);
+ if ($parts[0] !== 'principal') {
+ continue;
+ }
+ $principal = explode('/', $parts[1]);
+
+ if ($principal[1] === 'users') {
+ $this->triggerActivityUser($principal[2], $event, $properties, Extension::SUBJECT_SHARE_USER);
+
+ if ($owner !== $principal[2]) {
+ $parameters = [
+ $principal[2],
+ $properties['{DAV:}displayname'],
+ ];
+
+ if ($owner === $event->getAuthor()) {
+ $subject = Extension::SUBJECT_SHARE_USER . '_you';
+ } else {
+ $event->setAffectedUser($event->getAuthor())
+ ->setSubject(Extension::SUBJECT_SHARE_USER . '_you', $parameters);
+ $this->activityManager->publish($event);
+
+ $subject = Extension::SUBJECT_SHARE_USER . '_by';
+ $parameters[] = $event->getAuthor();
+ }
+
+ $event->setAffectedUser($owner)
+ ->setSubject($subject, $parameters);
+ $this->activityManager->publish($event);
+ }
+ } else if ($principal[1] === 'groups') {
+ $this->triggerActivityGroup($principal[2], $event, $properties, Extension::SUBJECT_SHARE_USER);
+
+ $parameters = [
+ $principal[2],
+ $properties['{DAV:}displayname'],
+ ];
+
+ if ($owner === $event->getAuthor()) {
+ $subject = Extension::SUBJECT_SHARE_GROUP . '_you';
+ } else {
+ $event->setAffectedUser($event->getAuthor())
+ ->setSubject(Extension::SUBJECT_SHARE_GROUP . '_you', $parameters);
+ $this->activityManager->publish($event);
+
+ $subject = Extension::SUBJECT_SHARE_GROUP . '_by';
+ $parameters[] = $event->getAuthor();
+ }
+
+ $event->setAffectedUser($owner)
+ ->setSubject($subject, $parameters);
+ $this->activityManager->publish($event);
+ }
+ }
+ }
+
+ /**
+ * Checks if a calendar is already shared with a principal
+ *
+ * @param string $principal
+ * @param array[] $shares
+ * @return bool
+ */
+ protected function isAlreadyShared($principal, $shares) {
+ foreach ($shares as $share) {
+ if ($principal === $share['href']) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Creates the given activity for all members of the given group
+ *
+ * @param string $gid
+ * @param IEvent $event
+ * @param array $properties
+ * @param string $subject
+ */
+ protected function triggerActivityGroup($gid, IEvent $event, array $properties, $subject) {
+ $group = $this->groupManager->get($gid);
+
+ if ($group instanceof IGroup) {
+ foreach ($group->getUsers() as $user) {
+ // Exclude current user
+ if ($user->getUID() !== $event->getAuthor()) {
+ $this->triggerActivityUser($user->getUID(), $event, $properties, $subject);
+ }
+ }
+ }
+ }
+
+ /**
+ * Creates the given activity for the given user
+ *
+ * @param string $user
+ * @param IEvent $event
+ * @param array $properties
+ * @param string $subject
+ * @param string $subjectSelf
+ */
+ protected function triggerActivityUser($user, IEvent $event, array $properties, $subject, $subjectSelf = '') {
+ $event->setAffectedUser($user)
+ ->setSubject(
+ $user === $event->getAuthor() && $subjectSelf ? $subjectSelf : $subject,
+ [
+ $event->getAuthor(),
+ $properties['{DAV:}displayname'],
+ ]
+ );
+
+ $this->activityManager->publish($event);
+ }
+
+ /**
+ * Get all users that have access to a given calendar
+ *
+ * @param int $calendarId
+ * @return string[]
+ */
+ protected function getUsersForCalendar($calendarId) {
+ $users = $groups = [];
+ $shares = $this->calDavBackend->getShares($calendarId);
+ foreach ($shares as $share) {
+ $prinical = explode('/', $share['{http://owncloud.org/ns}principal']);
+ if ($prinical[1] === 'users') {
+ $users[] = $prinical[2];
+ } else if ($prinical[1] === 'groups') {
+ $groups[] = $prinical[2];
+ }
+ }
+
+ if (!empty($groups)) {
+ foreach ($groups as $gid) {
+ $group = $this->groupManager->get($gid);
+ if ($group instanceof IGroup) {
+ foreach ($group->getUsers() as $user) {
+ $users[] = $user->getUID();
+ }
+ }
+ }
+ }
+
+ return $users;
+ }
+}
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