Add Typed Events for CalDAV- and CardDAV-related Events

Signed-off-by: Georg Ehrke <developer@georgehrke.com>

34 files changed, 2350 insertions, 104 deletions

diff --git a/apps/dav/appinfo/v1/caldav.php b/apps/dav/appinfo/v1/caldav.php
index 8fffe3855df..e04653ddea1 100644
--- a/apps/dav/appinfo/v1/caldav.php
+++ b/apps/dav/appinfo/v1/caldav.php
@@ -57,8 +57,10 @@ $db = \OC::$server->getDatabaseConnection();
 $userManager = \OC::$server->getUserManager();
 $random = \OC::$server->getSecureRandom();
 $logger = \OC::$server->getLogger();
-$dispatcher = \OC::$server->getEventDispatcher();
-$calDavBackend = new CalDavBackend($db, $principalBackend, $userManager, \OC::$server->getGroupManager(), $random, $logger, $dispatcher, true);
+$dispatcher = \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class);
+$legacyDispatcher = \OC::$server->getEventDispatcher();
+
+$calDavBackend = new CalDavBackend($db, $principalBackend, $userManager, \OC::$server->getGroupManager(), $random, $logger, $dispatcher, $legacyDispatcher, true);
 
 $debugging = \OC::$server->getConfig()->getSystemValue('debug', false);
 $sendInvitations = \OC::$server->getConfig()->getAppValue('dav', 'sendInvitations', 'yes') === 'yes';
diff --git a/apps/dav/appinfo/v1/carddav.php b/apps/dav/appinfo/v1/carddav.php
index cef3b6cec06..dbab1ae9681 100644
--- a/apps/dav/appinfo/v1/carddav.php
+++ b/apps/dav/appinfo/v1/carddav.php
@@ -57,7 +57,7 @@ $principalBackend = new Principal(
 	'principals/'
 );
 $db = \OC::$server->getDatabaseConnection();
-$cardDavBackend = new CardDavBackend($db, $principalBackend, \OC::$server->getUserManager(), \OC::$server->getGroupManager(), \OC::$server->getEventDispatcher());
+$cardDavBackend = new CardDavBackend($db, $principalBackend, \OC::$server->getUserManager(), \OC::$server->getGroupManager(), \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class), \OC::$server->getEventDispatcher());
 
 $debugging = \OC::$server->getConfig()->getSystemValue('debug', false);
 
diff --git a/apps/dav/composer/composer/autoload_classmap.php b/apps/dav/composer/composer/autoload_classmap.php
index b1b01885eef..0e465971a5e 100644
--- a/apps/dav/composer/composer/autoload_classmap.php
+++ b/apps/dav/composer/composer/autoload_classmap.php
@@ -170,7 +170,29 @@ return array(
     'OCA\\DAV\\Direct\\DirectHome' => $baseDir . '/../lib/Direct/DirectHome.php',
     'OCA\\DAV\\Direct\\Server' => $baseDir . '/../lib/Direct/Server.php',
     'OCA\\DAV\\Direct\\ServerFactory' => $baseDir . '/../lib/Direct/ServerFactory.php',
+    'OCA\\DAV\\Events\\AddressBookCreatedEvent' => $baseDir . '/../lib/Events/AddressBookCreatedEvent.php',
+    'OCA\\DAV\\Events\\AddressBookDeletedEvent' => $baseDir . '/../lib/Events/AddressBookDeletedEvent.php',
+    'OCA\\DAV\\Events\\AddressBookShareUpdatedEvent' => $baseDir . '/../lib/Events/AddressBookShareUpdatedEvent.php',
+    'OCA\\DAV\\Events\\AddressBookUpdatedEvent' => $baseDir . '/../lib/Events/AddressBookUpdatedEvent.php',
+    'OCA\\DAV\\Events\\CachedCalendarObjectCreatedEvent' => $baseDir . '/../lib/Events/CachedCalendarObjectCreatedEvent.php',
+    'OCA\\DAV\\Events\\CachedCalendarObjectDeletedEvent' => $baseDir . '/../lib/Events/CachedCalendarObjectDeletedEvent.php',
+    'OCA\\DAV\\Events\\CachedCalendarObjectUpdatedEvent' => $baseDir . '/../lib/Events/CachedCalendarObjectUpdatedEvent.php',
+    'OCA\\DAV\\Events\\CalendarCreatedEvent' => $baseDir . '/../lib/Events/CalendarCreatedEvent.php',
+    'OCA\\DAV\\Events\\CalendarDeletedEvent' => $baseDir . '/../lib/Events/CalendarDeletedEvent.php',
+    'OCA\\DAV\\Events\\CalendarObjectCreatedEvent' => $baseDir . '/../lib/Events/CalendarObjectCreatedEvent.php',
+    'OCA\\DAV\\Events\\CalendarObjectDeletedEvent' => $baseDir . '/../lib/Events/CalendarObjectDeletedEvent.php',
+    'OCA\\DAV\\Events\\CalendarObjectUpdatedEvent' => $baseDir . '/../lib/Events/CalendarObjectUpdatedEvent.php',
+    'OCA\\DAV\\Events\\CalendarPublishedEvent' => $baseDir . '/../lib/Events/CalendarPublishedEvent.php',
+    'OCA\\DAV\\Events\\CalendarShareUpdatedEvent' => $baseDir . '/../lib/Events/CalendarShareUpdatedEvent.php',
+    'OCA\\DAV\\Events\\CalendarUnpublishedEvent' => $baseDir . '/../lib/Events/CalendarUnpublishedEvent.php',
+    'OCA\\DAV\\Events\\CalendarUpdatedEvent' => $baseDir . '/../lib/Events/CalendarUpdatedEvent.php',
+    'OCA\\DAV\\Events\\CardCreatedEvent' => $baseDir . '/../lib/Events/CardCreatedEvent.php',
+    'OCA\\DAV\\Events\\CardDeletedEvent' => $baseDir . '/../lib/Events/CardDeletedEvent.php',
+    'OCA\\DAV\\Events\\CardUpdatedEvent' => $baseDir . '/../lib/Events/CardUpdatedEvent.php',
     'OCA\\DAV\\Events\\SabrePluginAuthInitEvent' => $baseDir . '/../lib/Events/SabrePluginAuthInitEvent.php',
+    'OCA\\DAV\\Events\\SubscriptionCreatedEvent' => $baseDir . '/../lib/Events/SubscriptionCreatedEvent.php',
+    'OCA\\DAV\\Events\\SubscriptionDeletedEvent' => $baseDir . '/../lib/Events/SubscriptionDeletedEvent.php',
+    'OCA\\DAV\\Events\\SubscriptionUpdatedEvent' => $baseDir . '/../lib/Events/SubscriptionUpdatedEvent.php',
     'OCA\\DAV\\Exception\\UnsupportedLimitOnInitialSyncException' => $baseDir . '/../lib/Exception/UnsupportedLimitOnInitialSyncException.php',
     'OCA\\DAV\\Files\\BrowserErrorPagePlugin' => $baseDir . '/../lib/Files/BrowserErrorPagePlugin.php',
     'OCA\\DAV\\Files\\FileSearchBackend' => $baseDir . '/../lib/Files/FileSearchBackend.php',
diff --git a/apps/dav/composer/composer/autoload_static.php b/apps/dav/composer/composer/autoload_static.php
index ccd0d41d68b..4788a41ef00 100644
--- a/apps/dav/composer/composer/autoload_static.php
+++ b/apps/dav/composer/composer/autoload_static.php
@@ -185,7 +185,29 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Direct\\DirectHome' => __DIR__ . '/..' . '/../lib/Direct/DirectHome.php',
         'OCA\\DAV\\Direct\\Server' => __DIR__ . '/..' . '/../lib/Direct/Server.php',
         'OCA\\DAV\\Direct\\ServerFactory' => __DIR__ . '/..' . '/../lib/Direct/ServerFactory.php',
+        'OCA\\DAV\\Events\\AddressBookCreatedEvent' => __DIR__ . '/..' . '/../lib/Events/AddressBookCreatedEvent.php',
+        'OCA\\DAV\\Events\\AddressBookDeletedEvent' => __DIR__ . '/..' . '/../lib/Events/AddressBookDeletedEvent.php',
+        'OCA\\DAV\\Events\\AddressBookShareUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/AddressBookShareUpdatedEvent.php',
+        'OCA\\DAV\\Events\\AddressBookUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/AddressBookUpdatedEvent.php',
+        'OCA\\DAV\\Events\\CachedCalendarObjectCreatedEvent' => __DIR__ . '/..' . '/../lib/Events/CachedCalendarObjectCreatedEvent.php',
+        'OCA\\DAV\\Events\\CachedCalendarObjectDeletedEvent' => __DIR__ . '/..' . '/../lib/Events/CachedCalendarObjectDeletedEvent.php',
+        'OCA\\DAV\\Events\\CachedCalendarObjectUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/CachedCalendarObjectUpdatedEvent.php',
+        'OCA\\DAV\\Events\\CalendarCreatedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarCreatedEvent.php',
+        'OCA\\DAV\\Events\\CalendarDeletedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarDeletedEvent.php',
+        'OCA\\DAV\\Events\\CalendarObjectCreatedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarObjectCreatedEvent.php',
+        'OCA\\DAV\\Events\\CalendarObjectDeletedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarObjectDeletedEvent.php',
+        'OCA\\DAV\\Events\\CalendarObjectUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarObjectUpdatedEvent.php',
+        'OCA\\DAV\\Events\\CalendarPublishedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarPublishedEvent.php',
+        'OCA\\DAV\\Events\\CalendarShareUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarShareUpdatedEvent.php',
+        'OCA\\DAV\\Events\\CalendarUnpublishedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarUnpublishedEvent.php',
+        'OCA\\DAV\\Events\\CalendarUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/CalendarUpdatedEvent.php',
+        'OCA\\DAV\\Events\\CardCreatedEvent' => __DIR__ . '/..' . '/../lib/Events/CardCreatedEvent.php',
+        'OCA\\DAV\\Events\\CardDeletedEvent' => __DIR__ . '/..' . '/../lib/Events/CardDeletedEvent.php',
+        'OCA\\DAV\\Events\\CardUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/CardUpdatedEvent.php',
         'OCA\\DAV\\Events\\SabrePluginAuthInitEvent' => __DIR__ . '/..' . '/../lib/Events/SabrePluginAuthInitEvent.php',
+        'OCA\\DAV\\Events\\SubscriptionCreatedEvent' => __DIR__ . '/..' . '/../lib/Events/SubscriptionCreatedEvent.php',
+        'OCA\\DAV\\Events\\SubscriptionDeletedEvent' => __DIR__ . '/..' . '/../lib/Events/SubscriptionDeletedEvent.php',
+        'OCA\\DAV\\Events\\SubscriptionUpdatedEvent' => __DIR__ . '/..' . '/../lib/Events/SubscriptionUpdatedEvent.php',
         'OCA\\DAV\\Exception\\UnsupportedLimitOnInitialSyncException' => __DIR__ . '/..' . '/../lib/Exception/UnsupportedLimitOnInitialSyncException.php',
         'OCA\\DAV\\Files\\BrowserErrorPagePlugin' => __DIR__ . '/..' . '/../lib/Files/BrowserErrorPagePlugin.php',
         'OCA\\DAV\\Files\\FileSearchBackend' => __DIR__ . '/..' . '/../lib/Files/FileSearchBackend.php',
diff --git a/apps/dav/lib/CalDAV/CalDavBackend.php b/apps/dav/lib/CalDAV/CalDavBackend.php
index 159f5c71673..f369fa40b8e 100644
--- a/apps/dav/lib/CalDAV/CalDavBackend.php
+++ b/apps/dav/lib/CalDAV/CalDavBackend.php
@@ -39,7 +39,23 @@ use DateTime;
 use OCA\DAV\Connector\Sabre\Principal;
 use OCA\DAV\DAV\Sharing\Backend;
 use OCA\DAV\DAV\Sharing\IShareable;
+use OCA\DAV\Events\CachedCalendarObjectCreatedEvent;
+use OCA\DAV\Events\CachedCalendarObjectDeletedEvent;
+use OCA\DAV\Events\CachedCalendarObjectUpdatedEvent;
+use OCA\DAV\Events\CalendarCreatedEvent;
+use OCA\DAV\Events\CalendarDeletedEvent;
+use OCA\DAV\Events\CalendarObjectCreatedEvent;
+use OCA\DAV\Events\CalendarObjectDeletedEvent;
+use OCA\DAV\Events\CalendarObjectUpdatedEvent;
+use OCA\DAV\Events\CalendarPublishedEvent;
+use OCA\DAV\Events\CalendarShareUpdatedEvent;
+use OCA\DAV\Events\CalendarUnpublishedEvent;
+use OCA\DAV\Events\CalendarUpdatedEvent;
+use OCA\DAV\Events\SubscriptionCreatedEvent;
+use OCA\DAV\Events\SubscriptionDeletedEvent;
+use OCA\DAV\Events\SubscriptionUpdatedEvent;
 use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\ILogger;
@@ -166,9 +182,12 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 	/** @var ILogger */
 	private $logger;
 
-	/** @var EventDispatcherInterface */
+	/** @var IEventDispatcher */
 	private $dispatcher;
 
+	/** @var EventDispatcherInterface */
+	private $legacyDispatcher;
+
 	/** @var bool */
 	private $legacyEndpoint;
 
@@ -184,7 +203,8 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 	 * @param IGroupManager $groupManager
 	 * @param ISecureRandom $random
 	 * @param ILogger $logger
-	 * @param EventDispatcherInterface $dispatcher
+	 * @param IEventDispatcher $dispatcher
+	 * @param EventDispatcherInterface $legacyDispatcher
 	 * @param bool $legacyEndpoint
 	 */
 	public function __construct(IDBConnection $db,
@@ -193,7 +213,8 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 								IGroupManager $groupManager,
 								ISecureRandom $random,
 								ILogger $logger,
-								EventDispatcherInterface $dispatcher,
+								IEventDispatcher $dispatcher,
+								EventDispatcherInterface $legacyDispatcher,
 								bool $legacyEndpoint = false) {
 		$this->db = $db;
 		$this->principalBackend = $principalBackend;
@@ -202,6 +223,7 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 		$this->random = $random;
 		$this->logger = $logger;
 		$this->dispatcher = $dispatcher;
+		$this->legacyDispatcher = $legacyDispatcher;
 		$this->legacyEndpoint = $legacyEndpoint;
 	}
 
@@ -764,11 +786,13 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 		$query->execute();
 		$calendarId = $query->getLastInsertId();
 
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendar', new GenericEvent(
+		$calendarData = $this->getCalendarById($calendarId);
+		$this->dispatcher->dispatchTyped(new CalendarCreatedEvent((int)$calendarId, $calendarData));
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendar', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::createCalendar',
 			[
 				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
+				'calendarData' => $calendarData,
 			]));
 
 		return $calendarId;
@@ -821,12 +845,15 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 
 			$this->addChange($calendarId, "", 2);
 
-			$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar', new GenericEvent(
+			$calendarData = $this->getCalendarById($calendarId);
+			$shares = $this->getShares($calendarId);
+			$this->dispatcher->dispatchTyped(new CalendarUpdatedEvent((int)$calendarId, $calendarData, $shares, $mutations));
+			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::updateCalendar',
 				[
 					'calendarId' => $calendarId,
-					'calendarData' => $this->getCalendarById($calendarId),
-					'shares' => $this->getShares($calendarId),
+					'calendarData' => $calendarData,
+					'shares' => $shares,
 					'propertyMutations' => $mutations,
 				]));
 
@@ -841,12 +868,15 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 	 * @return void
 	 */
 	public function deleteCalendar($calendarId) {
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar', new GenericEvent(
+		$calendarData = $this->getCalendarById($calendarId);
+		$shares = $this->getShares($calendarId);
+
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar',
 			[
 				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
-				'shares' => $this->getShares($calendarId),
+				'calendarData' => $calendarData,
+				'shares' => $shares,
 			]));
 
 		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `calendartype` = ?');
@@ -865,6 +895,10 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
 			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)))
 			->execute();
+
+		if ($calendarData) {
+			$this->dispatcher->dispatchTyped(new CalendarDeletedEvent((int)$calendarId, $calendarData, $shares));
+		}
 	}
 
 	/**
@@ -1085,29 +1119,37 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			->execute();
 
 		$this->updateProperties($calendarId, $objectUri, $calendarData, $calendarType);
+		$this->addChange($calendarId, $objectUri, 1, $calendarType);
 
+		$objectRow = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
 		if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
-			$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', new GenericEvent(
+			$calendarRow = $this->getCalendarById($calendarId);
+			$shares = $this->getShares($calendarId);
+
+			$this->dispatcher->dispatchTyped(new CalendarObjectCreatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
+			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject',
 				[
 					'calendarId' => $calendarId,
-					'calendarData' => $this->getCalendarById($calendarId),
-					'shares' => $this->getShares($calendarId),
-					'objectData' => $this->getCalendarObject($calendarId, $objectUri),
+					'calendarData' => $calendarRow,
+					'shares' => $shares,
+					'objectData' => $objectRow,
 				]
 			));
 		} else {
-			$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject', new GenericEvent(
+			$subscriptionRow = $this->getSubscriptionById($calendarId);
+
+			$this->dispatcher->dispatchTyped(new CachedCalendarObjectCreatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
+			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject',
 				[
 					'subscriptionId' => $calendarId,
-					'calendarData' => $this->getCalendarById($calendarId),
-					'shares' => $this->getShares($calendarId),
-					'objectData' => $this->getCalendarObject($calendarId, $objectUri),
+					'calendarData' => $subscriptionRow,
+					'shares' => [],
+					'objectData' => $objectRow,
 				]
 			));
 		}
-		$this->addChange($calendarId, $objectUri, 1, $calendarType);
 
 		return '"' . $extraData['etag'] . '"';
 	}
@@ -1150,32 +1192,39 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			->execute();
 
 		$this->updateProperties($calendarId, $objectUri, $calendarData, $calendarType);
+		$this->addChange($calendarId, $objectUri, 2, $calendarType);
 
-		$data = $this->getCalendarObject($calendarId, $objectUri);
-		if (is_array($data)) {
+		$objectRow = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
+		if (is_array($objectRow)) {
 			if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
-				$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', new GenericEvent(
+				$calendarRow = $this->getCalendarById($calendarId);
+				$shares = $this->getShares($calendarId);
+
+				$this->dispatcher->dispatchTyped(new CalendarObjectUpdatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
+				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject',
 					[
 						'calendarId' => $calendarId,
-						'calendarData' => $this->getCalendarById($calendarId),
-						'shares' => $this->getShares($calendarId),
-						'objectData' => $data,
+						'calendarData' => $calendarRow,
+						'shares' => $shares,
+						'objectData' => $objectRow,
 					]
 				));
 			} else {
-				$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject', new GenericEvent(
+				$subscriptionRow = $this->getSubscriptionById($calendarId);
+
+				$this->dispatcher->dispatchTyped(new CachedCalendarObjectUpdatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
+				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject',
 					[
 						'subscriptionId' => $calendarId,
-						'calendarData' => $this->getCalendarById($calendarId),
-						'shares' => $this->getShares($calendarId),
-						'objectData' => $data,
+						'calendarData' => $subscriptionRow,
+						'shares' => [],
+						'objectData' => $objectRow,
 					]
 				));
 			}
 		}
-		$this->addChange($calendarId, $objectUri, 2, $calendarType);
 
 		return '"' . $extraData['etag'] . '"';
 	}
@@ -1211,22 +1260,29 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 		$data = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
 		if (is_array($data)) {
 			if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
-				$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject', new GenericEvent(
+				$calendarRow = $this->getCalendarById($calendarId);
+				$shares = $this->getShares($calendarId);
+
+				$this->dispatcher->dispatchTyped(new CalendarObjectDeletedEvent((int)$calendarId, $calendarRow, $shares, $data));
+				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject',
 					[
 						'calendarId' => $calendarId,
-						'calendarData' => $this->getCalendarById($calendarId),
-						'shares' => $this->getShares($calendarId),
+						'calendarData' => $calendarRow,
+						'shares' => $shares,
 						'objectData' => $data,
 					]
 				));
 			} else {
-				$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject', new GenericEvent(
+				$subscriptionRow = $this->getSubscriptionById($calendarId);
+
+				$this->dispatcher->dispatchTyped(new CachedCalendarObjectDeletedEvent((int)$calendarId, $subscriptionRow, [], $data));
+				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject',
 					[
 						'subscriptionId' => $calendarId,
-						'calendarData' => $this->getCalendarById($calendarId),
-						'shares' => $this->getShares($calendarId),
+						'calendarData' => $subscriptionRow,
+						'shares' => [],
 						'objectData' => $data,
 					]
 				));
@@ -2060,11 +2116,13 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 
 		$subscriptionId = $this->db->lastInsertId('*PREFIX*calendarsubscriptions');
 
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createSubscription', new GenericEvent(
+		$subscriptionRow = $this->getSubscriptionById($subscriptionId);
+		$this->dispatcher->dispatchTyped(new SubscriptionCreatedEvent((int)$subscriptionId, $subscriptionRow));
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createSubscription', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::createSubscription',
 			[
 				'subscriptionId' => $subscriptionId,
-				'subscriptionData' => $this->getSubscriptionById($subscriptionId),
+				'subscriptionData' => $subscriptionRow,
 			]));
 
 		return $subscriptionId;
@@ -2114,11 +2172,13 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			$query->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
 				->execute();
 
-			$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateSubscription', new GenericEvent(
+			$subscriptionRow = $this->getSubscriptionById($subscriptionId);
+			$this->dispatcher->dispatchTyped(new SubscriptionUpdatedEvent((int)$subscriptionId, $subscriptionRow, [], $mutations));
+			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateSubscription', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::updateSubscription',
 				[
 					'subscriptionId' => $subscriptionId,
-					'subscriptionData' => $this->getSubscriptionById($subscriptionId),
+					'subscriptionData' => $subscriptionRow,
 					'propertyMutations' => $mutations,
 				]));
 
@@ -2133,7 +2193,9 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 	 * @return void
 	 */
 	public function deleteSubscription($subscriptionId) {
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteSubscription', new GenericEvent(
+		$subscriptionRow = $this->getSubscriptionById($subscriptionId);
+
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteSubscription', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::deleteSubscription',
 			[
 				'subscriptionId' => $subscriptionId,
@@ -2160,6 +2222,10 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
 			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
 			->execute();
+
+		if ($subscriptionRow) {
+			$this->dispatcher->dispatchTyped(new SubscriptionDeletedEvent((int)$subscriptionId, $subscriptionRow, []));
+		}
 	}
 
 	/**
@@ -2412,16 +2478,21 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 	 */
 	public function updateShares($shareable, $add, $remove) {
 		$calendarId = $shareable->getResourceId();
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateShares', new GenericEvent(
+		$calendarRow = $this->getCalendarById($calendarId);
+		$oldShares = $this->getShares($calendarId);
+
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateShares', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::updateShares',
 			[
 				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
-				'shares' => $this->getShares($calendarId),
+				'calendarData' => $calendarRow,
+				'shares' => $oldShares,
 				'add' => $add,
 				'remove' => $remove,
 			]));
 		$this->calendarSharingBackend->updateShares($shareable, $add, $remove);
+
+		$this->dispatcher->dispatchTyped(new CalendarShareUpdatedEvent((int)$calendarId, $calendarRow, $oldShares, $add, $remove));
 	}
 
 	/**
@@ -2440,11 +2511,12 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 	 */
 	public function setPublishStatus($value, $calendar) {
 		$calendarId = $calendar->getResourceId();
-		$this->dispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::publishCalendar', new GenericEvent(
+		$calendarData = $this->getCalendarById($calendarId);
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::publishCalendar', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::updateShares',
 			[
 				'calendarId' => $calendarId,
-				'calendarData' => $this->getCalendarById($calendarId),
+				'calendarData' => $calendarData,
 				'public' => $value,
 			]));
 
@@ -2460,12 +2532,16 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 					'publicuri' => $query->createNamedParameter($publicUri)
 				]);
 			$query->execute();
+
+			$this->dispatcher->dispatchTyped(new CalendarPublishedEvent((int)$calendarId, $calendarData, $publicUri));
 			return $publicUri;
 		}
 		$query->delete('dav_shares')
 			->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
 			->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)));
 		$query->execute();
+
+		$this->dispatcher->dispatchTyped(new CalendarUnpublishedEvent((int)$calendarId, $calendarData));
 		return null;
 	}
 
diff --git a/apps/dav/lib/CardDAV/CardDavBackend.php b/apps/dav/lib/CardDAV/CardDavBackend.php
index d819c42d286..f20b197b9ef 100644
--- a/apps/dav/lib/CardDAV/CardDavBackend.php
+++ b/apps/dav/lib/CardDAV/CardDavBackend.php
@@ -40,7 +40,15 @@ namespace OCA\DAV\CardDAV;
 use OCA\DAV\Connector\Sabre\Principal;
 use OCA\DAV\DAV\Sharing\Backend;
 use OCA\DAV\DAV\Sharing\IShareable;
+use OCA\DAV\Events\AddressBookCreatedEvent;
+use OCA\DAV\Events\AddressBookDeletedEvent;
+use OCA\DAV\Events\AddressBookShareUpdatedEvent;
+use OCA\DAV\Events\AddressBookUpdatedEvent;
+use OCA\DAV\Events\CardCreatedEvent;
+use OCA\DAV\Events\CardDeletedEvent;
+use OCA\DAV\Events\CardUpdatedEvent;
 use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\IUser;
@@ -87,9 +95,12 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	/** @var IUserManager */
 	private $userManager;
 
-	/** @var EventDispatcherInterface */
+	/** @var IEventDispatcher */
 	private $dispatcher;
 
+	/** @var EventDispatcherInterface */
+	private $legacyDispatcher;
+
 	private $etagCache = [];
 
 	/**
@@ -99,17 +110,20 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 * @param Principal $principalBackend
 	 * @param IUserManager $userManager
 	 * @param IGroupManager $groupManager
-	 * @param EventDispatcherInterface $dispatcher
+	 * @param IEventDispatcher $dispatcher
+	 * @param EventDispatcherInterface $legacyDispatcher
 	 */
 	public function __construct(IDBConnection $db,
 								Principal $principalBackend,
 								IUserManager $userManager,
 								IGroupManager $groupManager,
-								EventDispatcherInterface $dispatcher) {
+								IEventDispatcher $dispatcher,
+								EventDispatcherInterface $legacyDispatcher) {
 		$this->db = $db;
 		$this->principalBackend = $principalBackend;
 		$this->userManager = $userManager;
 		$this->dispatcher = $dispatcher;
+		$this->legacyDispatcher = $legacyDispatcher;
 		$this->sharingBackend = new Backend($this->db, $this->userManager, $groupManager, $principalBackend, 'addressbook');
 	}
 
@@ -388,6 +402,10 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 			$this->addChange($addressBookId, "", 2);
 
+			$addressBookRow = $this->getAddressBookById($addressBookId);
+			$shares = $this->getShares($addressBookId);
+			$this->dispatcher->dispatchTyped(new AddressBookUpdatedEvent((int)$addressBookId, $addressBookRow, $shares, $mutations));
+
 			return true;
 		});
 	}
@@ -441,7 +459,11 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 			->setParameters($values)
 			->execute();
 
-		return $query->getLastInsertId();
+		$addressBookId = $query->getLastInsertId();
+		$addressBookRow = $this->getAddressBookById($addressBookId);
+		$this->dispatcher->dispatchTyped(new AddressBookCreatedEvent((int)$addressBookId, $addressBookRow));
+
+		return $addressBookId;
 	}
 
 	/**
@@ -451,6 +473,9 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 * @return void
 	 */
 	public function deleteAddressBook($addressBookId) {
+		$addressBookData = $this->getAddressBookById($addressBookId);
+		$shares = $this->getShares($addressBookId);
+
 		$query = $this->db->getQueryBuilder();
 		$query->delete($this->dbCardsTable)
 			->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
@@ -472,6 +497,10 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 		$query->delete($this->dbCardsPropertiesTable)
 			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
 			->execute();
+
+		if ($addressBookData) {
+			$this->dispatcher->dispatchTyped(new AddressBookDeletedEvent((int) $addressBookId, $addressBookData, $shares));
+		}
 	}
 
 	/**
@@ -661,7 +690,11 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 		$this->addChange($addressBookId, $cardUri, 1);
 		$this->updateProperties($addressBookId, $cardUri, $cardData);
 
-		$this->dispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::createCard',
+		$addressBookData = $this->getAddressBookById($addressBookId);
+		$shares = $this->getShares($addressBookId);
+		$objectRow = $this->getCard($addressBookId, $cardUri);
+		$this->dispatcher->dispatchTyped(new CardCreatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::createCard',
 			new GenericEvent(null, [
 				'addressBookId' => $addressBookId,
 				'cardUri' => $cardUri,
@@ -721,7 +754,11 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 		$this->addChange($addressBookId, $cardUri, 2);
 		$this->updateProperties($addressBookId, $cardUri, $cardData);
 
-		$this->dispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::updateCard',
+		$addressBookData = $this->getAddressBookById($addressBookId);
+		$shares = $this->getShares($addressBookId);
+		$objectRow = $this->getCard($addressBookId, $cardUri);
+		$this->dispatcher->dispatchTyped(new CardUpdatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+		$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::updateCard',
 			new GenericEvent(null, [
 				'addressBookId' => $addressBookId,
 				'cardUri' => $cardUri,
@@ -738,6 +775,10 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 * @return bool
 	 */
 	public function deleteCard($addressBookId, $cardUri) {
+		$addressBookData = $this->getAddressBookById($addressBookId);
+		$shares = $this->getShares($addressBookId);
+		$objectRow = $this->getCard($addressBookId, $cardUri);
+
 		try {
 			$cardId = $this->getCardId($addressBookId, $cardUri);
 		} catch (\InvalidArgumentException $e) {
@@ -751,13 +792,14 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 		$this->addChange($addressBookId, $cardUri, 3);
 
-		$this->dispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::deleteCard',
-			new GenericEvent(null, [
-				'addressBookId' => $addressBookId,
-				'cardUri' => $cardUri]));
-
 		if ($ret === 1) {
 			if ($cardId !== null) {
+				$this->dispatcher->dispatchTyped(new CardDeletedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+				$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::deleteCard',
+					new GenericEvent(null, [
+						'addressBookId' => $addressBookId,
+						'cardUri' => $cardUri]));
+
 				$this->purgeProperties($addressBookId, $cardId);
 			}
 			return true;
@@ -947,7 +989,13 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 * @param string[] $remove
 	 */
 	public function updateShares(IShareable $shareable, $add, $remove) {
+		$addressBookId = $shareable->getResourceId();
+		$addressBookData = $this->getAddressBookById($addressBookId);
+		$oldShares = $this->getShares($addressBookId);
+
 		$this->sharingBackend->updateShares($shareable, $add, $remove);
+
+		$this->dispatcher->dispatchTyped(new AddressBookShareUpdatedEvent($addressBookId, $addressBookData, $oldShares, $add, $remove));
 	}
 
 	/**
diff --git a/apps/dav/lib/Command/CreateCalendar.php b/apps/dav/lib/Command/CreateCalendar.php
index d03b573e4ab..58c6a8c63fb 100644
--- a/apps/dav/lib/Command/CreateCalendar.php
+++ b/apps/dav/lib/Command/CreateCalendar.php
@@ -30,6 +30,7 @@ namespace OCA\DAV\Command;
 use OCA\DAV\CalDAV\CalDavBackend;
 use OCA\DAV\CalDAV\Proxy\ProxyMapper;
 use OCA\DAV\Connector\Sabre\Principal;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\IUserManager;
@@ -89,10 +90,11 @@ class CreateCalendar extends Command {
 		);
 		$random = \OC::$server->getSecureRandom();
 		$logger = \OC::$server->getLogger();
-		$dispatcher = \OC::$server->getEventDispatcher();
+		$dispatcher = \OC::$server->get(IEventDispatcher::class);
+		$legacyDispatcher = \OC::$server->getEventDispatcher();
 
 		$name = $input->getArgument('name');
-		$caldav = new CalDavBackend($this->dbConnection, $principalBackend, $this->userManager, $this->groupManager, $random, $logger, $dispatcher);
+		$caldav = new CalDavBackend($this->dbConnection, $principalBackend, $this->userManager, $this->groupManager, $random, $logger, $dispatcher, $legacyDispatcher);
 		$caldav->createCalendar("principals/users/$user", $name, []);
 		return 0;
 	}
diff --git a/apps/dav/lib/Events/AddressBookCreatedEvent.php b/apps/dav/lib/Events/AddressBookCreatedEvent.php
new file mode 100644
index 00000000000..c0e9b2370f2
--- /dev/null
+++ b/apps/dav/lib/Events/AddressBookCreatedEvent.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class AddressBookCreatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class AddressBookCreatedEvent extends Event {
+
+	/** @var int */
+	private $addressBookId;
+
+	/** @var array */
+	private $addressBookData;
+
+	/**
+	 * AddressBookCreatedEvent constructor.
+	 *
+	 * @param int $addressBookId
+	 * @param array $addressBookData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $addressBookId,
+								array $addressBookData) {
+		parent::__construct();
+		$this->addressBookId = $addressBookId;
+		$this->addressBookData = $addressBookData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getAddressBookId(): int {
+		return $this->addressBookId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAddressBookData(): array {
+		return $this->addressBookData;
+	}
+}
diff --git a/apps/dav/lib/Events/AddressBookDeletedEvent.php b/apps/dav/lib/Events/AddressBookDeletedEvent.php
new file mode 100644
index 00000000000..39ae3bd2799
--- /dev/null
+++ b/apps/dav/lib/Events/AddressBookDeletedEvent.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class AddressBookDeletedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class AddressBookDeletedEvent extends Event {
+
+	/** @var int */
+	private $addressBookId;
+
+	/** @var array */
+	private $addressBookData;
+
+	/** @var array */
+	private $shares;
+
+	/**
+	 * AddressBookDeletedEvent constructor.
+	 *
+	 * @param int $addressBookId
+	 * @param array $addressBookData
+	 * @param array $shares
+	 * @since 20.0.0
+	 */
+	public function __construct(int $addressBookId,
+								array $addressBookData,
+								array $shares) {
+		parent::__construct();
+		$this->addressBookId = $addressBookId;
+		$this->addressBookData = $addressBookData;
+		$this->shares = $shares;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getAddressBookId():int {
+		return $this->addressBookId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAddressBookData(): array {
+		return $this->addressBookData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+}
diff --git a/apps/dav/lib/Events/AddressBookShareUpdatedEvent.php b/apps/dav/lib/Events/AddressBookShareUpdatedEvent.php
new file mode 100644
index 00000000000..343fb2c6b6b
--- /dev/null
+++ b/apps/dav/lib/Events/AddressBookShareUpdatedEvent.php
@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class AddressBookShareUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class AddressBookShareUpdatedEvent extends Event {
+
+	/** @var int */
+	private $addressBookId;
+
+	/** @var array */
+	private $addressBookData;
+
+	/** @var array */
+	private $oldShares;
+
+	/** @var array */
+	private $added;
+
+	/** @var array */
+	private $removed;
+
+	/**
+	 * AddressBookShareUpdatedEvent constructor.
+	 *
+	 * @param int $addressBookId
+	 * @param array $addressBookData
+	 * @param array $oldShares
+	 * @param array $added
+	 * @param array $removed
+	 * @since 20.0.0
+	 */
+	public function __construct(int $addressBookId,
+								array $addressBookData,
+								array $oldShares,
+								array $added,
+								array $removed) {
+		parent::__construct();
+		$this->addressBookId = $addressBookId;
+		$this->addressBookData = $addressBookData;
+		$this->oldShares = $oldShares;
+		$this->added = $added;
+		$this->removed = $removed;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getAddressBookId(): int {
+		return $this->addressBookId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAddressBookData(): array {
+		return $this->addressBookData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getOldShares(): array {
+		return $this->oldShares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAdded(): array {
+		return $this->added;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getRemoved(): array {
+		return $this->removed;
+	}
+}
diff --git a/apps/dav/lib/Events/AddressBookUpdatedEvent.php b/apps/dav/lib/Events/AddressBookUpdatedEvent.php
new file mode 100644
index 00000000000..59fe0b7b28a
--- /dev/null
+++ b/apps/dav/lib/Events/AddressBookUpdatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class AddressBookUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class AddressBookUpdatedEvent extends Event {
+
+	/** @var int */
+	private $addressBookId;
+
+	/** @var array */
+	private $addressBookData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $mutations;
+
+	/**
+	 * AddressBookUpdatedEvent constructor.
+	 *
+	 * @param int $addressBookId
+	 * @param array $addressBookData
+	 * @param array $shares
+	 * @param array $mutations
+	 * @since 20.0.0
+	 */
+	public function __construct(int $addressBookId,
+								array $addressBookData,
+								array $shares,
+								array $mutations) {
+		parent::__construct();
+		$this->addressBookId = $addressBookId;
+		$this->addressBookData = $addressBookData;
+		$this->shares = $shares;
+		$this->mutations = $mutations;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getAddressBookId(): int {
+		return $this->addressBookId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAddressBookData(): array {
+		return $this->addressBookData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getMutations(): array {
+		return $this->mutations;
+	}
+}
diff --git a/apps/dav/lib/Events/CachedCalendarObjectCreatedEvent.php b/apps/dav/lib/Events/CachedCalendarObjectCreatedEvent.php
new file mode 100644
index 00000000000..466009ea368
--- /dev/null
+++ b/apps/dav/lib/Events/CachedCalendarObjectCreatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CachedCalendarObjectCreatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CachedCalendarObjectCreatedEvent extends Event {
+
+	/** @var int */
+	private $subscriptionId;
+
+	/** @var array */
+	private $subscriptionData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $objectData;
+
+	/**
+	 * CachedCalendarObjectCreatedEvent constructor.
+	 *
+	 * @param int $subscriptionId
+	 * @param array $subscriptionData
+	 * @param array $shares
+	 * @param array $objectData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $subscriptionId,
+								array $subscriptionData,
+								array $shares,
+								array $objectData) {
+		parent::__construct();
+		$this->subscriptionId = $subscriptionId;
+		$this->subscriptionData = $subscriptionData;
+		$this->shares = $shares;
+		$this->objectData = $objectData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionId(): int {
+		return $this->subscriptionId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionData(): array {
+		return $this->subscriptionData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getObjectData(): array {
+		return $this->objectData;
+	}
+}
diff --git a/apps/dav/lib/Events/CachedCalendarObjectDeletedEvent.php b/apps/dav/lib/Events/CachedCalendarObjectDeletedEvent.php
new file mode 100644
index 00000000000..fbb2a9cab0b
--- /dev/null
+++ b/apps/dav/lib/Events/CachedCalendarObjectDeletedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CachedCalendarObjectDeletedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CachedCalendarObjectDeletedEvent extends Event {
+
+	/** @var int */
+	private $subscriptionId;
+
+	/** @var array */
+	private $subscriptionData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $objectData;
+
+	/**
+	 * CachedCalendarObjectDeletedEvent constructor.
+	 *
+	 * @param int $subscriptionId
+	 * @param array $subscriptionData
+	 * @param array $shares
+	 * @param array $objectData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $subscriptionId,
+								array $subscriptionData,
+								array $shares,
+								array $objectData) {
+		parent::__construct();
+		$this->subscriptionId = $subscriptionId;
+		$this->subscriptionData = $subscriptionData;
+		$this->shares = $shares;
+		$this->objectData = $objectData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionId(): int {
+		return $this->subscriptionId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionData(): array {
+		return $this->subscriptionData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getObjectData(): array {
+		return $this->objectData;
+	}
+}
diff --git a/apps/dav/lib/Events/CachedCalendarObjectUpdatedEvent.php b/apps/dav/lib/Events/CachedCalendarObjectUpdatedEvent.php
new file mode 100644
index 00000000000..c2a50c42efe
--- /dev/null
+++ b/apps/dav/lib/Events/CachedCalendarObjectUpdatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CachedCalendarObjectUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CachedCalendarObjectUpdatedEvent extends Event {
+
+	/** @var int */
+	private $subscriptionId;
+
+	/** @var array */
+	private $subscriptionData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $objectData;
+
+	/**
+	 * CachedCalendarObjectUpdatedEvent constructor.
+	 *
+	 * @param int $subscriptionId
+	 * @param array $subscriptionData
+	 * @param array $shares
+	 * @param array $objectData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $subscriptionId,
+								array $subscriptionData,
+								array $shares,
+								array $objectData) {
+		parent::__construct();
+		$this->subscriptionId = $subscriptionId;
+		$this->subscriptionData = $subscriptionData;
+		$this->shares = $shares;
+		$this->objectData = $objectData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionId(): int {
+		return $this->subscriptionId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionData(): array {
+		return $this->subscriptionData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getObjectData(): array {
+		return $this->objectData;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarCreatedEvent.php b/apps/dav/lib/Events/CalendarCreatedEvent.php
new file mode 100644
index 00000000000..7f4aa4ac03e
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarCreatedEvent.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarCreatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarCreatedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/**
+	 * CalendarCreatedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarDeletedEvent.php b/apps/dav/lib/Events/CalendarDeletedEvent.php
new file mode 100644
index 00000000000..f26e1a7fb6a
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarDeletedEvent.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarDeletedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarDeletedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/** @var array  */
+	private $shares;
+
+	/**
+	 * CalendarDeletedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @param array $shares
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData,
+								array $shares) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+		$this->shares = $shares;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarObjectCreatedEvent.php b/apps/dav/lib/Events/CalendarObjectCreatedEvent.php
new file mode 100644
index 00000000000..dcd68e4cd0a
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarObjectCreatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarObjectCreatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarObjectCreatedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $objectData;
+
+	/**
+	 * CalendarObjectCreatedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @param array $shares
+	 * @param array $objectData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData,
+								array $shares,
+								array $objectData) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+		$this->shares = $shares;
+		$this->objectData = $objectData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getObjectData(): array {
+		return $this->objectData;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarObjectDeletedEvent.php b/apps/dav/lib/Events/CalendarObjectDeletedEvent.php
new file mode 100644
index 00000000000..357e9ede11f
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarObjectDeletedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarObjectDeletedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarObjectDeletedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $objectData;
+
+	/**
+	 * CalendarObjectDeletedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @param array $shares
+	 * @param array $objectData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData,
+								array $shares,
+								array $objectData) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+		$this->shares = $shares;
+		$this->objectData = $objectData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getObjectData(): array {
+		return $this->objectData;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarObjectUpdatedEvent.php b/apps/dav/lib/Events/CalendarObjectUpdatedEvent.php
new file mode 100644
index 00000000000..28378005042
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarObjectUpdatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarObjectUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarObjectUpdatedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $objectData;
+
+	/**
+	 * CalendarObjectUpdatedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @param array $shares
+	 * @param array $objectData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData,
+								array $shares,
+								array $objectData) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+		$this->shares = $shares;
+		$this->objectData = $objectData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getObjectData(): array {
+		return $this->objectData;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarPublishedEvent.php b/apps/dav/lib/Events/CalendarPublishedEvent.php
new file mode 100644
index 00000000000..63a2937d0cf
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarPublishedEvent.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarPublishedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarPublishedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/** @var string */
+	private $publicUri;
+
+	/**
+	 * CalendarPublishedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @param string $publicUri
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData,
+								string $publicUri) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+		$this->publicUri = $publicUri;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+
+	/**
+	 * @return string
+	 * @since 20.0.0
+	 */
+	public function getPublicUri(): string {
+		return $this->publicUri;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarShareUpdatedEvent.php b/apps/dav/lib/Events/CalendarShareUpdatedEvent.php
new file mode 100644
index 00000000000..18b579540f1
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarShareUpdatedEvent.php
@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarShareUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarShareUpdatedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/** @var array */
+	private $oldShares;
+
+	/** @var array */
+	private $added;
+
+	/** @var array */
+	private $removed;
+
+	/**
+	 * CalendarShareUpdatedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @param array $oldShares
+	 * @param array $added
+	 * @param array $removed
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData,
+								array $oldShares,
+								array $added,
+								array $removed) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+		$this->oldShares = $oldShares;
+		$this->added = $added;
+		$this->removed = $removed;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getOldShares(): array {
+		return $this->oldShares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAdded(): array {
+		return $this->added;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getRemoved(): array {
+		return $this->removed;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarUnpublishedEvent.php b/apps/dav/lib/Events/CalendarUnpublishedEvent.php
new file mode 100644
index 00000000000..dd927d808ac
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarUnpublishedEvent.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarPublishedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarUnpublishedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/**
+	 * CalendarUnpublishedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+}
diff --git a/apps/dav/lib/Events/CalendarUpdatedEvent.php b/apps/dav/lib/Events/CalendarUpdatedEvent.php
new file mode 100644
index 00000000000..644a29d97fa
--- /dev/null
+++ b/apps/dav/lib/Events/CalendarUpdatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CalendarUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CalendarUpdatedEvent extends Event {
+
+	/** @var int */
+	private $calendarId;
+
+	/** @var array */
+	private $calendarData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $mutations;
+
+	/**
+	 * CalendarUpdatedEvent constructor.
+	 *
+	 * @param int $calendarId
+	 * @param array $calendarData
+	 * @param array $shares
+	 * @param array $mutations
+	 * @since 20.0.0
+	 */
+	public function __construct(int $calendarId,
+								array $calendarData,
+								array $shares,
+								array $mutations) {
+		parent::__construct();
+		$this->calendarId = $calendarId;
+		$this->calendarData = $calendarData;
+		$this->shares = $shares;
+		$this->mutations = $mutations;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getCalendarId(): int {
+		return $this->calendarId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCalendarData(): array {
+		return $this->calendarData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getMutations(): array {
+		return $this->mutations;
+	}
+}
diff --git a/apps/dav/lib/Events/CardCreatedEvent.php b/apps/dav/lib/Events/CardCreatedEvent.php
new file mode 100644
index 00000000000..e885a05f91e
--- /dev/null
+++ b/apps/dav/lib/Events/CardCreatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CardCreatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CardCreatedEvent extends Event {
+
+	/** @var int */
+	private $addressBookId;
+
+	/** @var array */
+	private $addressBookData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $cardData;
+
+	/**
+	 * CardCreatedEvent constructor.
+	 *
+	 * @param int $addressBookId
+	 * @param array $addressBookData
+	 * @param array $shares
+	 * @param array $cardData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $addressBookId,
+								array $addressBookData,
+								array $shares,
+								array $cardData) {
+		parent::__construct();
+		$this->addressBookId = $addressBookId;
+		$this->addressBookData = $addressBookData;
+		$this->shares = $shares;
+		$this->cardData = $cardData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getAddressBookId(): int {
+		return $this->addressBookId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAddressBookData(): array {
+		return $this->addressBookData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCardData(): array {
+		return $this->cardData;
+	}
+}
diff --git a/apps/dav/lib/Events/CardDeletedEvent.php b/apps/dav/lib/Events/CardDeletedEvent.php
new file mode 100644
index 00000000000..27e8ccf48e6
--- /dev/null
+++ b/apps/dav/lib/Events/CardDeletedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CardDeletedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CardDeletedEvent extends Event {
+
+	/** @var int */
+	private $addressBookId;
+
+	/** @var array */
+	private $addressBookData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $cardData;
+
+	/**
+	 * CardDeletedEvent constructor.
+	 *
+	 * @param int $addressBookId
+	 * @param array $addressBookData
+	 * @param array $shares
+	 * @param array $cardData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $addressBookId,
+								array $addressBookData,
+								array $shares,
+								array $cardData) {
+		parent::__construct();
+		$this->addressBookId = $addressBookId;
+		$this->addressBookData = $addressBookData;
+		$this->shares = $shares;
+		$this->cardData = $cardData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getAddressBookId(): int {
+		return $this->addressBookId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAddressBookData(): array {
+		return $this->addressBookData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCardData(): array {
+		return $this->cardData;
+	}
+}
diff --git a/apps/dav/lib/Events/CardUpdatedEvent.php b/apps/dav/lib/Events/CardUpdatedEvent.php
new file mode 100644
index 00000000000..ff8b66d4c9f
--- /dev/null
+++ b/apps/dav/lib/Events/CardUpdatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class CardUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class CardUpdatedEvent extends Event {
+
+	/** @var int */
+	private $addressBookId;
+
+	/** @var array */
+	private $addressBookData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $cardData;
+
+	/**
+	 * CardUpdatedEvent constructor.
+	 *
+	 * @param int $addressBookId
+	 * @param array $addressBookData
+	 * @param array $shares
+	 * @param array $cardData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $addressBookId,
+								array $addressBookData,
+								array $shares,
+								array $cardData) {
+		parent::__construct();
+		$this->addressBookId = $addressBookId;
+		$this->addressBookData = $addressBookData;
+		$this->shares = $shares;
+		$this->cardData = $cardData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getAddressBookId(): int {
+		return $this->addressBookId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getAddressBookData(): array {
+		return $this->addressBookData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getCardData(): array {
+		return $this->cardData;
+	}
+}
diff --git a/apps/dav/lib/Events/SubscriptionCreatedEvent.php b/apps/dav/lib/Events/SubscriptionCreatedEvent.php
new file mode 100644
index 00000000000..36cff537a6f
--- /dev/null
+++ b/apps/dav/lib/Events/SubscriptionCreatedEvent.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class SubscriptionCreatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class SubscriptionCreatedEvent extends Event {
+
+	/** @var int */
+	private $subscriptionId;
+
+	/** @var array */
+	private $subscriptionData;
+
+	/**
+	 * SubscriptionCreatedEvent constructor.
+	 *
+	 * @param int $subscriptionId
+	 * @param array $subscriptionData
+	 * @since 20.0.0
+	 */
+	public function __construct(int $subscriptionId,
+								array $subscriptionData) {
+		parent::__construct();
+		$this->subscriptionId = $subscriptionId;
+		$this->subscriptionData = $subscriptionData;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionId(): int {
+		return $this->subscriptionId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionData(): array {
+		return $this->subscriptionData;
+	}
+}
diff --git a/apps/dav/lib/Events/SubscriptionDeletedEvent.php b/apps/dav/lib/Events/SubscriptionDeletedEvent.php
new file mode 100644
index 00000000000..d21102bf1ac
--- /dev/null
+++ b/apps/dav/lib/Events/SubscriptionDeletedEvent.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class SubscriptionDeletedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class SubscriptionDeletedEvent extends Event {
+
+	/** @var int */
+	private $subscriptionId;
+
+	/** @var array */
+	private $subscriptionData;
+
+	/** @var array */
+	private $shares;
+
+	/**
+	 * SubscriptionDeletedEvent constructor.
+	 *
+	 * @param int $subscriptionId
+	 * @param array $subscriptionData
+	 * @param array $shares
+	 * @since 20.0.0
+	 */
+	public function __construct(int $subscriptionId,
+								array $subscriptionData,
+								array $shares) {
+		parent::__construct();
+		$this->subscriptionId = $subscriptionId;
+		$this->subscriptionData = $subscriptionData;
+		$this->shares = $shares;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionId(): int {
+		return $this->subscriptionId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionData(): array {
+		return $this->subscriptionData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+}
diff --git a/apps/dav/lib/Events/SubscriptionUpdatedEvent.php b/apps/dav/lib/Events/SubscriptionUpdatedEvent.php
new file mode 100644
index 00000000000..ec74ce863a3
--- /dev/null
+++ b/apps/dav/lib/Events/SubscriptionUpdatedEvent.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Events;
+
+use OCP\EventDispatcher\Event;
+
+/**
+ * Class SubscriptionUpdatedEvent
+ *
+ * @package OCA\DAV\Events
+ * @since 20.0.0
+ */
+class SubscriptionUpdatedEvent extends Event {
+
+	/** @var int */
+	private $subscriptionId;
+
+	/** @var array */
+	private $subscriptionData;
+
+	/** @var array */
+	private $shares;
+
+	/** @var array */
+	private $mutations;
+
+	/**
+	 * SubscriptionUpdatedEvent constructor.
+	 *
+	 * @param int $subscriptionId
+	 * @param array $subscriptionData
+	 * @param array $shares
+	 * @param array $mutations
+	 * @since 20.0.0
+	 */
+	public function __construct(int $subscriptionId,
+								array $subscriptionData,
+								array $shares,
+								array $mutations) {
+		parent::__construct();
+		$this->subscriptionId = $subscriptionId;
+		$this->subscriptionData = $subscriptionData;
+		$this->shares = $shares;
+		$this->mutations = $mutations;
+	}
+
+	/**
+	 * @return int
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionId(): int {
+		return $this->subscriptionId;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getSubscriptionData(): array {
+		return $this->subscriptionData;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getShares(): array {
+		return $this->shares;
+	}
+
+	/**
+	 * @return array
+	 * @since 20.0.0
+	 */
+	public function getMutations(): array {
+		return $this->mutations;
+	}
+}
diff --git a/apps/dav/lib/RootCollection.php b/apps/dav/lib/RootCollection.php
index 53cba3eefa0..83f3691959b 100644
--- a/apps/dav/lib/RootCollection.php
+++ b/apps/dav/lib/RootCollection.php
@@ -45,6 +45,7 @@ use OCA\DAV\Provisioning\Apple\AppleProvisioningNode;
 use OCA\DAV\Upload\CleanupService;
 use OCP\App\IAppManager;
 use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\EventDispatcher\IEventDispatcher;
 use Sabre\DAV\SimpleCollection;
 
 class RootCollection extends SimpleCollection {
@@ -58,7 +59,8 @@ class RootCollection extends SimpleCollection {
 		$groupManager = \OC::$server->getGroupManager();
 		$shareManager = \OC::$server->getShareManager();
 		$db = \OC::$server->getDatabaseConnection();
-		$dispatcher = \OC::$server->getEventDispatcher();
+		$dispatcher = \OC::$server->get(IEventDispatcher::class);
+		$legacyDispatcher = \OC::$server->getEventDispatcher();
 		$proxyMapper = \OC::$server->query(ProxyMapper::class);
 
 		$userPrincipalBackend = new Principal(
@@ -91,14 +93,14 @@ class RootCollection extends SimpleCollection {
 
 		$filesCollection = new Files\RootCollection($userPrincipalBackend, 'principals/users');
 		$filesCollection->disableListing = $disableListing;
-		$caldavBackend = new CalDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $random, $logger, $dispatcher);
+		$caldavBackend = new CalDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $random, $logger, $dispatcher, $legacyDispatcher);
 		$userCalendarRoot = new CalendarRoot($userPrincipalBackend, $caldavBackend, 'principals/users');
 		$userCalendarRoot->disableListing = $disableListing;
 
-		$resourceCalendarCaldavBackend = new CalDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $random, $logger, $dispatcher);
+		$resourceCalendarCaldavBackend = new CalDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $random, $logger, $dispatcher, $legacyDispatcher);
 		$resourceCalendarRoot = new CalendarRoot($calendarResourcePrincipalBackend, $caldavBackend, 'principals/calendar-resources');
 		$resourceCalendarRoot->disableListing = $disableListing;
-		$roomCalendarCaldavBackend = new CalDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $random, $logger, $dispatcher);
+		$roomCalendarCaldavBackend = new CalDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $random, $logger, $dispatcher, $legacyDispatcher);
 		$roomCalendarRoot = new CalendarRoot($calendarRoomPrincipalBackend, $roomCalendarCaldavBackend, 'principals/calendar-rooms');
 		$roomCalendarRoot->disableListing = $disableListing;
 
@@ -126,11 +128,11 @@ class RootCollection extends SimpleCollection {
 		);
 
 		$pluginManager = new PluginManager(\OC::$server, \OC::$server->query(IAppManager::class));
-		$usersCardDavBackend = new CardDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $dispatcher);
+		$usersCardDavBackend = new CardDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $dispatcher, $legacyDispatcher);
 		$usersAddressBookRoot = new AddressBookRoot($userPrincipalBackend, $usersCardDavBackend, $pluginManager, 'principals/users');
 		$usersAddressBookRoot->disableListing = $disableListing;
 
-		$systemCardDavBackend = new CardDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $dispatcher);
+		$systemCardDavBackend = new CardDavBackend($db, $userPrincipalBackend, $userManager, $groupManager, $dispatcher, $legacyDispatcher);
 		$systemAddressBookRoot = new AddressBookRoot(new SystemPrincipalBackend(), $systemCardDavBackend, $pluginManager, 'principals/system');
 		$systemAddressBookRoot->disableListing = $disableListing;
 
diff --git a/apps/dav/tests/unit/CalDAV/AbstractCalDavBackend.php b/apps/dav/tests/unit/CalDAV/AbstractCalDavBackend.php
index c7371761266..85efd0fd369 100644
--- a/apps/dav/tests/unit/CalDAV/AbstractCalDavBackend.php
+++ b/apps/dav/tests/unit/CalDAV/AbstractCalDavBackend.php
@@ -31,6 +31,7 @@ use OCA\DAV\CalDAV\CalDavBackend;
 use OCA\DAV\CalDAV\Proxy\ProxyMapper;
 use OCA\DAV\Connector\Sabre\Principal;
 use OCP\App\IAppManager;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\IGroupManager;
 use OCP\ILogger;
@@ -63,6 +64,8 @@ abstract class AbstractCalDavBackend extends TestCase {
 	protected $groupManager;
 	/** @var EventDispatcherInterface|\PHPUnit\Framework\MockObject\MockObject */
 	protected $dispatcher;
+	/** @var IEventDispatcher|\PHPUnit\Framework\MockObject\MockObject */
+	protected $legacyDispatcher;
 
 	/** @var ISecureRandom */
 	private $random;
@@ -79,7 +82,8 @@ abstract class AbstractCalDavBackend extends TestCase {
 
 		$this->userManager = $this->createMock(IUserManager::class);
 		$this->groupManager = $this->createMock(IGroupManager::class);
-		$this->dispatcher = $this->createMock(EventDispatcherInterface::class);
+		$this->dispatcher = $this->createMock(IEventDispatcher::class);
+		$this->legacyDispatcher = $this->createMock(EventDispatcherInterface::class);
 		$this->principal = $this->getMockBuilder(Principal::class)
 			->setConstructorArgs([
 				$this->userManager,
@@ -104,7 +108,7 @@ abstract class AbstractCalDavBackend extends TestCase {
 		$db = \OC::$server->getDatabaseConnection();
 		$this->random = \OC::$server->getSecureRandom();
 		$this->logger = $this->createMock(ILogger::class);
-		$this->backend = new CalDavBackend($db, $this->principal, $this->userManager, $this->groupManager, $this->random, $this->logger, $this->dispatcher);
+		$this->backend = new CalDavBackend($db, $this->principal, $this->userManager, $this->groupManager, $this->random, $this->logger, $this->dispatcher, $this->legacyDispatcher);
 
 		$this->cleanUpBackend();
 	}
@@ -128,7 +132,7 @@ abstract class AbstractCalDavBackend extends TestCase {
 	private function cleanupForPrincipal($principal): void {
 		$calendars = $this->backend->getCalendarsForUser($principal);
 		foreach ($calendars as $calendar) {
-			$this->dispatcher->expects($this->at(0))
+			$this->legacyDispatcher->expects($this->at(0))
 				->method('dispatch')
 				->with('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar');
 
@@ -141,7 +145,7 @@ abstract class AbstractCalDavBackend extends TestCase {
 	}
 
 	protected function createTestCalendar() {
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendar');
 
@@ -198,7 +202,7 @@ END:VCALENDAR
 EOD;
 		$uri0 = $this->getUniqueID('event');
 
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject');
 
diff --git a/apps/dav/tests/unit/CalDAV/CalDavBackendTest.php b/apps/dav/tests/unit/CalDAV/CalDavBackendTest.php
index ee08719f9bc..bb6e1b2bad7 100644
--- a/apps/dav/tests/unit/CalDAV/CalDavBackendTest.php
+++ b/apps/dav/tests/unit/CalDAV/CalDavBackendTest.php
@@ -57,7 +57,7 @@ class CalDavBackendTest extends AbstractCalDavBackend {
 			'{DAV:}displayname' => 'Unit test',
 			'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'Calendar used for unit testing'
 		]);
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar');
 		$this->backend->updateCalendar($calendarId, $patch);
@@ -70,7 +70,7 @@ class CalDavBackendTest extends AbstractCalDavBackend {
 		$this->assertEquals('User\'s displayname', $calendars[0]['{http://nextcloud.com/ns}owner-displayname']);
 
 		// delete the address book
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar');
 		$this->backend->deleteCalendar($calendars[0]['id']);
@@ -148,7 +148,7 @@ class CalDavBackendTest extends AbstractCalDavBackend {
 		$calendars = $this->backend->getCalendarsForUser(self::UNIT_TEST_USER);
 		$this->assertCount(1, $calendars);
 		$calendar = new Calendar($this->backend, $calendars[0], $l10n, $config);
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::updateShares');
 		$this->backend->updateShares($calendar, $add, []);
@@ -181,7 +181,7 @@ END:VEVENT
 END:VCALENDAR
 EOD;
 
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject');
 		$this->backend->createCalendarObject($calendarId, $uri, $calData);
@@ -195,7 +195,7 @@ EOD;
 		$this->assertAccess($userCanWrite, self::UNIT_TEST_USER1, '{DAV:}write', $acl);
 
 		// delete the address book
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar');
 		$this->backend->deleteCalendar($calendars[0]['id']);
@@ -225,7 +225,7 @@ END:VEVENT
 END:VCALENDAR
 EOD;
 
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject');
 		$this->backend->createCalendarObject($calendarId, $uri, $calData);
@@ -263,7 +263,7 @@ DTEND;VALUE=DATE-TIME:20130912T140000Z
 END:VEVENT
 END:VCALENDAR
 EOD;
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject');
 		$this->backend->updateCalendarObject($calendarId, $uri, $calData);
@@ -271,7 +271,7 @@ EOD;
 		$this->assertEquals($calData, $calendarObject['calendardata']);
 
 		// delete the card
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject');
 		$this->backend->deleteCalendarObject($calendarId, $uri);
@@ -366,17 +366,17 @@ END:VCALENDAR
 EOD;
 
 		$uri0 = static::getUniqueID('card');
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject');
 		$this->backend->createCalendarObject($calendarId, $uri0, $calData[0]);
 		$uri1 = static::getUniqueID('card');
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject');
 		$this->backend->createCalendarObject($calendarId, $uri1, $calData[1]);
 		$uri2 = static::getUniqueID('card');
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject');
 		$this->backend->createCalendarObject($calendarId, $uri2, $calData[2]);
@@ -405,15 +405,15 @@ EOD;
 		$this->assertEquals($calData[2], $calendarObjects[1]['calendardata']);
 
 		// delete the card
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject');
 		$this->backend->deleteCalendarObject($calendarId, $uri0);
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject');
 		$this->backend->deleteCalendarObject($calendarId, $uri1);
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject');
 		$this->backend->deleteCalendarObject($calendarId, $uri2);
@@ -498,7 +498,7 @@ EOD;
 	}
 
 	public function testPublications() {
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CalDAV\CalDavBackend::createCalendar');
 
diff --git a/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php b/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php
index 985da38133c..5200d201f50 100644
--- a/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php
+++ b/apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php
@@ -36,6 +36,7 @@ use OCA\DAV\CalDAV\Calendar;
 use OCA\DAV\CalDAV\PublicCalendar;
 use OCA\DAV\CalDAV\PublicCalendarRoot;
 use OCA\DAV\Connector\Sabre\Principal;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\IGroupManager;
 use OCP\IL10N;
@@ -83,7 +84,8 @@ class PublicCalendarRootTest extends TestCase {
 		$this->groupManager = $this->createMock(IGroupManager::class);
 		$this->random = \OC::$server->getSecureRandom();
 		$this->logger = $this->createMock(ILogger::class);
-		$dispatcher = $this->createMock(EventDispatcherInterface::class);
+		$dispatcher = $this->createMock(IEventDispatcher::class);
+		$legacyDispatcher = $this->createMock(EventDispatcherInterface::class);
 
 		$this->principal->expects($this->any())->method('getGroupMembership')
 			->withAnyParameters()
@@ -100,7 +102,8 @@ class PublicCalendarRootTest extends TestCase {
 			$this->groupManager,
 			$this->random,
 			$this->logger,
-			$dispatcher
+			$dispatcher,
+			$legacyDispatcher
 		);
 		$this->l10n = $this->getMockBuilder(IL10N::class)
 			->disableOriginalConstructor()->getMock();
diff --git a/apps/dav/tests/unit/CardDAV/CardDavBackendTest.php b/apps/dav/tests/unit/CardDAV/CardDavBackendTest.php
index 6b90096c57f..95617001b31 100644
--- a/apps/dav/tests/unit/CardDAV/CardDavBackendTest.php
+++ b/apps/dav/tests/unit/CardDAV/CardDavBackendTest.php
@@ -39,6 +39,7 @@ use OCA\DAV\CardDAV\CardDavBackend;
 use OCA\DAV\Connector\Sabre\Principal;
 use OCP\App\IAppManager;
 use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
@@ -76,6 +77,9 @@ class CardDavBackendTest extends TestCase {
 	private $groupManager;
 
 	/** @var EventDispatcherInterface|\PHPUnit\Framework\MockObject\MockObject */
+	private $legacyDispatcher;
+
+	/** @var IEventDispatcher|\PHPUnit\Framework\MockObject\MockObject */
 	private $dispatcher;
 
 	/** @var  IDBConnection */
@@ -147,11 +151,12 @@ class CardDavBackendTest extends TestCase {
 		$this->principal->method('getGroupMembership')
 			->withAnyParameters()
 			->willReturn([self::UNIT_TEST_GROUP]);
-		$this->dispatcher = $this->createMock(EventDispatcherInterface::class);
+		$this->dispatcher = $this->createMock(IEventDispatcher::class);
+		$this->legacyDispatcher = $this->createMock(EventDispatcherInterface::class);
 
 		$this->db = \OC::$server->getDatabaseConnection();
 
-		$this->backend = new CardDavBackend($this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher);
+		$this->backend = new CardDavBackend($this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher);
 		// start every test with a empty cards_properties and cards table
 		$query = $this->db->getQueryBuilder();
 		$query->delete('cards_properties')->execute();
@@ -241,7 +246,7 @@ class CardDavBackendTest extends TestCase {
 
 		/** @var CardDavBackend | \PHPUnit\Framework\MockObject\MockObject $backend */
 		$backend = $this->getMockBuilder(CardDavBackend::class)
-				->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+				->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 				->setMethods(['updateProperties', 'purgeProperties'])->getMock();
 
 		// create a new address book
@@ -256,7 +261,7 @@ class CardDavBackendTest extends TestCase {
 		$backend->expects($this->at(1))->method('updateProperties')->with($bookId, $uri, $this->vcardTest1);
 
 		// Expect event
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CardDAV\CardDavBackend::createCard', $this->callback(function (GenericEvent $e) use ($bookId, $uri) {
 				return $e->getArgument('addressBookId') === $bookId &&
@@ -283,7 +288,7 @@ class CardDavBackendTest extends TestCase {
 		$this->assertEquals($this->vcardTest0, $card['carddata']);
 
 		// Expect event
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CardDAV\CardDavBackend::updateCard', $this->callback(function (GenericEvent $e) use ($bookId, $uri) {
 				return $e->getArgument('addressBookId') === $bookId &&
@@ -297,7 +302,7 @@ class CardDavBackendTest extends TestCase {
 		$this->assertEquals($this->vcardTest1, $card['carddata']);
 
 		// Expect event
-		$this->dispatcher->expects($this->at(0))
+		$this->legacyDispatcher->expects($this->at(0))
 			->method('dispatch')
 			->with('\OCA\DAV\CardDAV\CardDavBackend::deleteCard', $this->callback(function (GenericEvent $e) use ($bookId, $uri) {
 				return $e->getArgument('addressBookId') === $bookId &&
@@ -313,7 +318,7 @@ class CardDavBackendTest extends TestCase {
 
 	public function testMultiCard() {
 		$this->backend = $this->getMockBuilder(CardDavBackend::class)
-			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 			->setMethods(['updateProperties'])->getMock();
 
 		// create a new address book
@@ -366,7 +371,7 @@ class CardDavBackendTest extends TestCase {
 
 	public function testMultipleUIDOnDifferentAddressbooks() {
 		$this->backend = $this->getMockBuilder(CardDavBackend::class)
-			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 			->setMethods(['updateProperties'])->getMock();
 
 		// create 2 new address books
@@ -388,7 +393,7 @@ class CardDavBackendTest extends TestCase {
 
 	public function testMultipleUIDDenied() {
 		$this->backend = $this->getMockBuilder(CardDavBackend::class)
-			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 			->setMethods(['updateProperties'])->getMock();
 
 		// create a new address book
@@ -409,7 +414,7 @@ class CardDavBackendTest extends TestCase {
 
 	public function testNoValidUID() {
 		$this->backend = $this->getMockBuilder(CardDavBackend::class)
-			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 			->setMethods(['updateProperties'])->getMock();
 
 		// create a new address book
@@ -426,7 +431,7 @@ class CardDavBackendTest extends TestCase {
 
 	public function testDeleteWithoutCard() {
 		$this->backend = $this->getMockBuilder(CardDavBackend::class)
-			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 			->setMethods([
 				'getCardId',
 				'addChange',
@@ -466,7 +471,7 @@ class CardDavBackendTest extends TestCase {
 
 	public function testSyncSupport() {
 		$this->backend = $this->getMockBuilder(CardDavBackend::class)
-			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 			->setMethods(['updateProperties'])->getMock();
 
 		// create a new address book
@@ -532,7 +537,7 @@ class CardDavBackendTest extends TestCase {
 		$cardId = 2;
 
 		$backend = $this->getMockBuilder(CardDavBackend::class)
-			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher])
+			->setConstructorArgs([$this->db, $this->principal, $this->userManager, $this->groupManager, $this->dispatcher, $this->legacyDispatcher])
 			->setMethods(['getCardId'])->getMock();
 
 		$backend->expects($this->any())->method('getCardId')->willReturn($cardId);