Some activity hardening (#997)

Some activity hardening

lib/Activity/ActivityManager.php

@@ -302,6 +302,8 @@ class ActivityManager {
 		try {
 			$object = $this->findObjectForEntity($objectType, $entity);
 		} catch (DoesNotExistException $e) {
+			\OC::$server->getLogger()->error('Could not create activity entry for ' . $subject . '. Entity not found.', $entity);
+			return null;
 		} catch (MultipleObjectsReturnedException $e) {
 			\OC::$server->getLogger()->error('Could not create activity entry for ' . $subject . '. Entity not found.', $entity);
 			return null;

lib/Activity/DeckProvider.php

@@ -95,16 +95,18 @@ class DeckProvider implements IProvider {
 			unset($subjectParams['author']);
 		}
 		$user = $this->userManager->get($author);
-		$params = [
-			'user' => [
-				'type' => 'user',
-				'id' => $author,
-				'name' => $user !== null ? $user->getDisplayName() : $author
-			],
-		];
-		$event->setAuthor($author);
+		if ($user !== null) {
+			$params = [
+				'user' => [
+					'type' => 'user',
+					'id' => $author,
+					'name' => $user !== null ? $user->getDisplayName() : $author
+				],
+			];
+			$event->setAuthor($author);
+		}
 		if ($event->getObjectType() === ActivityManager::DECK_OBJECT_BOARD) {
-			if ($event->getObjectName() === '') {
+			if (isset($subjectParams['board']) && $event->getObjectName() === '') {
 				$event->setObject($event->getObjectType(), $event->getObjectId(), $subjectParams['board']['title']);
 			}
 			$board = [
@@ -116,7 +118,7 @@ class DeckProvider implements IProvider {
 			$params['board'] = $board;
 		}
 
-		if ($event->getObjectType() === ActivityManager::DECK_OBJECT_CARD) {
+		if (isset($subjectParams['card']) && $event->getObjectType() === ActivityManager::DECK_OBJECT_CARD) {
 			if ($event->getObjectName() === '') {
 				$event->setObject($event->getObjectType(), $event->getObjectId(), $subjectParams['card']['title']);
 			}

tests/unit/Activity/DeckProviderTest.php

@@ -25,6 +25,7 @@ namespace OCA\Deck\Activity;
 
 use OC\Activity\Event;
 use OCA\Deck\Db\Acl;
+use OCA\Deck\Db\Card;
 use OCP\Activity\IEvent;
 use OCP\Comments\IComment;
 use OCP\Comments\ICommentsManager;
@@ -212,7 +213,7 @@ class DeckProviderTest extends TestCase {
 		$event = new Event($richValidator);
 
 		$event->setApp('deck');
-		$event->setSubject(ActivityManager::SUBJECT_CARD_CREATE);
+		$event->setSubject(ActivityManager::SUBJECT_CARD_CREATE, ['card' => new Card()]);
 		$event->setAffectedUser($this->userId);
 		$event->setAuthor($this->userId);
 		$event->setObject(ActivityManager::DECK_OBJECT_CARD, 1, 'Card');
@@ -260,6 +261,7 @@ class DeckProviderTest extends TestCase {
 			'before' => 'ABC',
 			'after' => 'BCD',
 			'diff' => true,
+			'card' => new Card()
 		]);
 		$event->setAffectedUser($this->userId);
 		$event->setAuthor($this->userId);