Use the new OCP method to get user with access to a file

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/systemtags/lib/Activity/Listener.php

@@ -29,7 +29,6 @@
 use OCP\App\IAppManager;
 use OCP\Files\Config\IMountProviderCollection;
 use OCP\Files\IRootFolder;
-use OCP\Files\Node;
 use OCP\IConfig;
 use OCP\IGroup;
 use OCP\IGroupManager;
@@ -171,22 +170,16 @@ public function mapperEvent(MapperEvent $event) {
 
 		// Get all mount point owners
 		$cache = $this->mountCollection->getMountCache();
-		$mounts = $cache->getMountsForFileId($event->getObjectId());
-		if (empty($mounts)) {
-			return;
-		}
 
 		$users = [];
-		foreach ($mounts as $mount) {
-			$owner = $mount->getUser()->getUID();
-			$ownerFolder = $this->rootFolder->getUserFolder($owner);
-			$nodes = $ownerFolder->getById($event->getObjectId());
-			if (!empty($nodes)) {
-				/** @var Node $node */
-				$node = array_shift($nodes);
-				$al = $this->shareHelper->getPathsForAccessList($node);
-				$users += $al['users'];
-			}
+		$filesPerUser = $cache->getFilesByUserId((int)$event->getComment()->getObjectId());
+		if (empty($filesPerUser)) {
+			return;
+		}
+		foreach ($filesPerUser as $user => $files) {
+			/* Remove /user/files prefix */
+			$sections = explode('/', reset($files)?->getPath() ?? '', 4);
+			$users[$user] = '/'.($sections[3] ?? '');
 		}
 
 		$actor = $this->session->getUser();

core/Command/Info/FileUtils.php

@@ -72,18 +72,7 @@ public function getFilesByUser(FileInfo $file): array {
 			return [];
 		}
 
-		$mounts = $this->userMountCache->getMountsForFileId($id);
-		$result = [];
-		foreach ($mounts as $mount) {
-			if (isset($result[$mount->getUser()->getUID()])) {
-				continue;
-			}
-
-			$userFolder = $this->rootFolder->getUserFolder($mount->getUser()->getUID());
-			$result[$mount->getUser()->getUID()] = $userFolder->getById($id);
-		}
-
-		return $result;
+		return $this->userMountCache->getNodesByUserForFileId($id);
 	}
 
 	/**