fix(caldav): event links in shared calendar notifications

Signed-off-by: Richard Steinmetz <richard@steinmetz.cloud>

3 files changed, 61 insertions, 18 deletions

diff --git a/apps/dav/lib/CalDAV/Activity/Provider/Event.php b/apps/dav/lib/CalDAV/Activity/Provider/Event.php
index 13f0036b0b0..a24ea791e74 100644
--- a/apps/dav/lib/CalDAV/Activity/Provider/Event.php
+++ b/apps/dav/lib/CalDAV/Activity/Provider/Event.php
@@ -81,7 +81,7 @@ class Event extends Base {
 	 * @param array $eventData
 	 * @return array
 	 */
-	protected function generateObjectParameter(array $eventData) {
+	protected function generateObjectParameter(array $eventData, string $affectedUser): array {
 		if (!isset($eventData['id']) || !isset($eventData['name'])) {
 			throw new \InvalidArgumentException();
 		}
@@ -97,7 +97,15 @@ class Event extends Base {
 				// The calendar app needs to be manually loaded for the routes to be loaded
 				OC_App::loadApp('calendar');
 				$linkData = $eventData['link'];
-				$objectId = base64_encode($this->url->getWebroot() . '/remote.php/dav/calendars/' . $linkData['owner'] . '/' . $linkData['calendar_uri'] . '/' . $linkData['object_uri']);
+				if ($affectedUser === $linkData['owner']) {
+					$objectId = base64_encode($this->url->getWebroot() . '/remote.php/dav/calendars/' . $linkData['owner'] . '/' . $linkData['calendar_uri'] . '/' . $linkData['object_uri']);
+				} else {
+					// Can't use the "real" owner and calendar names here because we create a custom
+					// calendar for incoming shares with the name "<calendar>_shared_by_<sharer>".
+					// Hack: Fix the link by generating it for the incoming shared calendar instead,
+					//       as seen from the affected user.
+					$objectId = base64_encode($this->url->getWebroot() . '/remote.php/dav/calendars/' . $affectedUser . '/' . $linkData['calendar_uri'] . '_shared_by_' . $linkData['owner'] . '/' . $linkData['object_uri']);
+				}
 				$link = [
 					'view' => 'dayGridMonth',
 					'timeRange' => 'now',
@@ -189,7 +197,7 @@ class Event extends Base {
 					return [
 						'actor' => $this->generateUserParameter($parameters['actor']),
 						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
-						'event' => $this->generateClassifiedObjectParameter($parameters['object']),
+						'event' => $this->generateClassifiedObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 				case self::SUBJECT_OBJECT_ADD . '_event_self':
 				case self::SUBJECT_OBJECT_DELETE . '_event_self':
@@ -198,7 +206,7 @@ class Event extends Base {
 				case self::SUBJECT_OBJECT_RESTORE . '_event_self':
 					return [
 						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
-						'event' => $this->generateClassifiedObjectParameter($parameters['object']),
+						'event' => $this->generateClassifiedObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 			}
 		}
@@ -210,13 +218,13 @@ class Event extends Base {
 						'actor' => $this->generateUserParameter($parameters['actor']),
 						'sourceCalendar' => $this->generateCalendarParameter($parameters['sourceCalendar'], $this->l),
 						'targetCalendar' => $this->generateCalendarParameter($parameters['targetCalendar'], $this->l),
-						'event' => $this->generateClassifiedObjectParameter($parameters['object']),
+						'event' => $this->generateClassifiedObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 				case self::SUBJECT_OBJECT_MOVE . '_event_self':
 					return [
 						'sourceCalendar' => $this->generateCalendarParameter($parameters['sourceCalendar'], $this->l),
 						'targetCalendar' => $this->generateCalendarParameter($parameters['targetCalendar'], $this->l),
-						'event' => $this->generateClassifiedObjectParameter($parameters['object']),
+						'event' => $this->generateClassifiedObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 			}
 		}
@@ -233,22 +241,22 @@ class Event extends Base {
 				return [
 					'actor' => $this->generateUserParameter($parameters[0]),
 					'calendar' => $this->generateLegacyCalendarParameter($event->getObjectId(), $parameters[1]),
-					'event' => $this->generateObjectParameter($parameters[2]),
+					'event' => $this->generateObjectParameter($parameters[2], $event->getAffectedUser()),
 				];
 			case self::SUBJECT_OBJECT_ADD . '_event_self':
 			case self::SUBJECT_OBJECT_DELETE . '_event_self':
 			case self::SUBJECT_OBJECT_UPDATE . '_event_self':
 				return [
 					'calendar' => $this->generateLegacyCalendarParameter($event->getObjectId(), $parameters[1]),
-					'event' => $this->generateObjectParameter($parameters[2]),
+					'event' => $this->generateObjectParameter($parameters[2], $event->getAffectedUser()),
 				];
 		}
 
 		throw new \InvalidArgumentException();
 	}
 
-	private function generateClassifiedObjectParameter(array $eventData) {
-		$parameter = $this->generateObjectParameter($eventData);
+	private function generateClassifiedObjectParameter(array $eventData, string $affectedUser): array {
+		$parameter = $this->generateObjectParameter($eventData, $affectedUser);
 		if (!empty($eventData['classified'])) {
 			$parameter['name'] = $this->l->t('Busy');
 		}
diff --git a/apps/dav/lib/CalDAV/Activity/Provider/Todo.php b/apps/dav/lib/CalDAV/Activity/Provider/Todo.php
index e2ddb99a1af..e4518ff49c2 100644
--- a/apps/dav/lib/CalDAV/Activity/Provider/Todo.php
+++ b/apps/dav/lib/CalDAV/Activity/Provider/Todo.php
@@ -104,7 +104,7 @@ class Todo extends Event {
 					return [
 						'actor' => $this->generateUserParameter($parameters['actor']),
 						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
-						'todo' => $this->generateObjectParameter($parameters['object']),
+						'todo' => $this->generateObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 				case self::SUBJECT_OBJECT_ADD . '_todo_self':
 				case self::SUBJECT_OBJECT_DELETE . '_todo_self':
@@ -113,7 +113,7 @@ class Todo extends Event {
 				case self::SUBJECT_OBJECT_UPDATE . '_todo_needs_action_self':
 					return [
 						'calendar' => $this->generateCalendarParameter($parameters['calendar'], $this->l),
-						'todo' => $this->generateObjectParameter($parameters['object']),
+						'todo' => $this->generateObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 			}
 		}
@@ -125,13 +125,13 @@ class Todo extends Event {
 						'actor' => $this->generateUserParameter($parameters['actor']),
 						'sourceCalendar' => $this->generateCalendarParameter($parameters['sourceCalendar'], $this->l),
 						'targetCalendar' => $this->generateCalendarParameter($parameters['targetCalendar'], $this->l),
-						'todo' => $this->generateObjectParameter($parameters['object']),
+						'todo' => $this->generateObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 				case self::SUBJECT_OBJECT_MOVE . '_todo_self':
 					return [
 						'sourceCalendar' => $this->generateCalendarParameter($parameters['sourceCalendar'], $this->l),
 						'targetCalendar' => $this->generateCalendarParameter($parameters['targetCalendar'], $this->l),
-						'todo' => $this->generateObjectParameter($parameters['object']),
+						'todo' => $this->generateObjectParameter($parameters['object'], $event->getAffectedUser()),
 					];
 			}
 		}
@@ -150,7 +150,7 @@ class Todo extends Event {
 				return [
 					'actor' => $this->generateUserParameter($parameters[0]),
 					'calendar' => $this->generateLegacyCalendarParameter($event->getObjectId(), $parameters[1]),
-					'todo' => $this->generateObjectParameter($parameters[2]),
+					'todo' => $this->generateObjectParameter($parameters[2], $event->getAffectedUser()),
 				];
 			case self::SUBJECT_OBJECT_ADD . '_todo_self':
 			case self::SUBJECT_OBJECT_DELETE . '_todo_self':
@@ -159,7 +159,7 @@ class Todo extends Event {
 			case self::SUBJECT_OBJECT_UPDATE . '_todo_needs_action_self':
 				return [
 					'calendar' => $this->generateLegacyCalendarParameter($event->getObjectId(), $parameters[1]),
-					'todo' => $this->generateObjectParameter($parameters[2]),
+					'todo' => $this->generateObjectParameter($parameters[2], $event->getAffectedUser()),
 				];
 		}
 
diff --git a/apps/dav/tests/unit/CalDAV/Activity/Provider/EventTest.php b/apps/dav/tests/unit/CalDAV/Activity/Provider/EventTest.php
index 253e1628229..33fbc7a7432 100644
--- a/apps/dav/tests/unit/CalDAV/Activity/Provider/EventTest.php
+++ b/apps/dav/tests/unit/CalDAV/Activity/Provider/EventTest.php
@@ -108,7 +108,9 @@ class EventTest extends TestCase {
 	 * @param bool $calendarAppEnabled
 	 */
 	public function testGenerateObjectParameter(int $id, string $name, ?array $link, bool $calendarAppEnabled = true): void {
+		$affectedUser = 'otheruser';
 		if ($link) {
+			$affectedUser = $link['owner'];
 			$generatedLink = [
 				'view' => 'dayGridMonth',
 				'timeRange' => 'now',
@@ -141,7 +143,40 @@ class EventTest extends TestCase {
 		if ($link && $calendarAppEnabled) {
 			$result['link'] = 'fullLink';
 		}
-		$this->assertEquals($result, $this->invokePrivate($this->provider, 'generateObjectParameter', [$objectParameter]));
+		$this->assertEquals($result, $this->invokePrivate($this->provider, 'generateObjectParameter', [$objectParameter, $affectedUser]));
+	}
+
+	public function testGenerateObjectParameterWithSharedCalendar(): void {
+		$link = [
+			'object_uri' => 'someuuid.ics',
+			'calendar_uri' => 'personal',
+			'owner' => 'sharer'
+		];
+		$generatedLink = [
+			'view' => 'dayGridMonth',
+			'timeRange' => 'now',
+			'mode' => 'sidebar',
+			'objectId' => base64_encode('/remote.php/dav/calendars/sharee/' . $link['calendar_uri'] . '_shared_by_sharer/' . $link['object_uri']),
+			'recurrenceId' => 'next'
+		];
+		$this->appManager->expects($this->once())
+			->method('isEnabledForUser')
+			->with('calendar')
+			->willReturn(true);
+		$this->url->expects($this->once())
+			->method('getWebroot');
+		$this->url->expects($this->once())
+			->method('linkToRouteAbsolute')
+			->with('calendar.view.indexview.timerange.edit', $generatedLink)
+			->willReturn('fullLink');
+		$objectParameter = ['id' => 42, 'name' => 'calendar', 'link' => $link];
+		$result = [
+			'type' => 'calendar-event',
+			'id' => 42,
+			'name' => 'calendar',
+			'link' => 'fullLink',
+		];
+		$this->assertEquals($result, $this->invokePrivate($this->provider, 'generateObjectParameter', [$objectParameter, 'sharee']));
 	}
 
 	public function dataGenerateObjectParameterThrows() {
@@ -160,6 +195,6 @@ class EventTest extends TestCase {
 	public function testGenerateObjectParameterThrows($eventData, string $exception = InvalidArgumentException::class): void {
 		$this->expectException($exception);
 
-		$this->invokePrivate($this->provider, 'generateObjectParameter', [$eventData]);
+		$this->invokePrivate($this->provider, 'generateObjectParameter', [$eventData, 'no_user']);
 	}
 }