fix(psalm): Enable psalm level 3

lib/ACL/ACLManager.php

@@ -14,6 +14,7 @@
 use OCP\Files\IRootFolder;
 use OCP\IUser;
 use Psr\Log\LoggerInterface;
+use RuntimeException;
 
 class ACLManager {
 	private CappedMemoryCache $ruleCache;
@@ -88,6 +89,9 @@ private function getRelevantPaths(string $path): array {
 			$groupFolderId = (int)$groupFolderId;
 			/* Remove the date part */
 			$separatorPos = strrpos($rootTrashedItemName, '.d');
+			if ($separatorPos === false) {
+				throw new RuntimeException('Invalid trash item name ' . $rootTrashedItemName);
+			}
 			$rootTrashedItemDate = (int)substr($rootTrashedItemName, $separatorPos + 2);
 			$rootTrashedItemName = substr($rootTrashedItemName, 0, $separatorPos);
 		}
@@ -97,6 +101,7 @@ private function getRelevantPaths(string $path): array {
 			$path = dirname($path);
 			if ($fromTrashbin && ($path === '__groupfolders/trash')) {
 				/* We are in trash and hit the root folder, continue looking for ACLs on parent folders in original location */
+				/** @psalm-suppress PossiblyUndefinedVariable Variables are defined above */
 				$trashItemRow = $this->trashManager->getTrashItemByFileName($groupFolderId, $rootTrashedItemName, $rootTrashedItemDate);
 				$fromTrashbin = false;
 				if ($trashItemRow) {

lib/ACL/ACLStorageWrapper.php

@@ -101,6 +101,10 @@ public function opendir($path) {
 		}
 
 		$handle = parent::opendir($path);
+		if ($handle === false) {
+			return false;
+		}
+
 		$items = [];
 		while (($file = readdir($handle)) !== false) {
 			if ($file !== '.' && $file !== '..') {

lib/ACL/UserMapping/UserMappingManager.php

@@ -32,6 +32,7 @@ public function mappingFromId(string $type, string $id): ?IUserMapping {
 		$mappingObject = ($type === 'group' ? $this->groupManager : $this->userManager)->get($id);
 		if ($mappingObject) {
 			$displayName = $mappingObject->getDisplayName();
+			/** @var 'user'|'group' $type */
 			return new UserMapping($type, $id, $displayName);
 		} else {
 			return null;

lib/DAV/ACLPlugin.php

@@ -11,7 +11,7 @@
 use OCA\DAV\Connector\Sabre\Node;
 use OCA\GroupFolders\ACL\Rule;
 use OCA\GroupFolders\ACL\RuleManager;
-use OCA\GroupFolders\ACL\UserMapping\UserMapping;
+use OCA\GroupFolders\ACL\UserMapping\IUserMapping;
 use OCA\GroupFolders\Folder\FolderManager;
 use OCA\GroupFolders\Mount\GroupMountPoint;
 use OCP\Constants;
@@ -145,7 +145,7 @@ public function propFind(PropFind $propFind, INode $node): void {
 				}
 			}
 
-			return array_map(fn (UserMapping $mapping, int $permissions, int $mask): Rule => new Rule(
+			return array_map(fn (IUserMapping $mapping, int $permissions, int $mask): Rule => new Rule(
 				$mapping,
 				$fileInfo->getId(),
 				$mask,

lib/Folder/FolderManager.php

@@ -95,7 +95,7 @@ private function joinQueryWithFileCache(IQueryBuilder $query, int $rootStorageId
 	}
 
 	/**
-	 * @return array<int, array{acl: bool, groups: array<string, array{displayName: string, type: string, permissions: integer}>, id: int, manage: array<array-key, array{displayname?: string, id?: string, type?: "group"|"user"|"circle"}>, mount_point: mixed, quota: int, size: int}>
+	 * @return array<int, array{acl: bool, groups: array<string, array{displayName: string, type: string, permissions: integer}>, id: int, manage: array<array-key, array{displayname: string, id: string, type: "group"|"user"|"circle"}>, mount_point: mixed, quota: int, size: int}>
 	 * @throws Exception
 	 */
 	public function getAllFoldersWithSize(int $rootStorageId): array {
@@ -130,7 +130,7 @@ public function getAllFoldersWithSize(int $rootStorageId): array {
 	}
 
 	/**
-	 * @return array<int, array{acl: bool, groups: array<string, array{displayName: string, type: string, permissions: integer}>, id: int, manage: array<array-key, array{displayname?: string, id?: string, type?: "group"|"user"|"circle"}>, mount_point: mixed, quota: int, size: int}>
+	 * @return array<int, array{acl: bool, groups: array<string, array{displayName: string, type: string, permissions: integer}>, id: int, manage: array<array-key, array{displayname: string, id: string, type: "group"|"user"|"circle"}>, mount_point: mixed, quota: int, size: int}>
 	 * @throws Exception
 	 */
 	public function getAllFoldersForUserWithSize(int $rootStorageId, IUser $user): array {
@@ -212,7 +212,7 @@ private function getFolderMappings(int $id): array {
 	}
 
 	/**
-	 * @return array{type?: 'user'|'group', id?: string, displayname?: string}[]
+	 * @return array{type: 'user'|'group', id: string, displayname: string}[]
 	 */
 	private function getManageAcl(array $mappings): array {
 		return array_filter(array_map(function (array $entry): ?array {
@@ -231,15 +231,15 @@ private function getManageAcl(array $mappings): array {
 
 			$group = Server::get(IGroupManager::class)->get($entry['mapping_id']);
 			if ($group === null) {
-				return [];
+				return null;
 			}
 
 			return [
 				'type' => 'group',
 				'id' => $group->getGID(),
 				'displayname' => $group->getDisplayName()
 			];
-		}, $mappings), fn (?array $element): bool => $element !== null);
+		}, $mappings));
 	}
 
 	/**

lib/Mount/GroupMountPoint.php

@@ -7,23 +7,22 @@
 namespace OCA\GroupFolders\Mount;
 
 use OC\Files\Mount\MountPoint;
+use OC\Files\Storage\Storage;
 use OCP\Files\Mount\ISystemMountPoint;
 use OCP\Files\Storage\IStorage;
 use OCP\Files\Storage\IStorageFactory;
 
 class GroupMountPoint extends MountPoint implements ISystemMountPoint {
-	/**
-	 * @param IStorage $storage
-	 */
 	public function __construct(
 		private int $folderId,
-		$storage,
+		IStorage $storage,
 		string $mountpoint,
 		?array $arguments = null,
 		?IStorageFactory $loader = null,
 		?array $mountOptions = null,
 		?int $mountId = null,
 	) {
+		/** @var Storage $storage */
 		parent::__construct($storage, $mountpoint, $arguments, $loader, $mountOptions, $mountId, MountProvider::class);
 	}
 

lib/Mount/MountProvider.php

@@ -154,6 +154,9 @@ public function getMount(
 			}
 
 			$cacheEntry = $this->getRootFolder()->getStorage()->getCache()->get($folder->getId());
+			if ($cacheEntry === false) {
+				return null;
+			}
 		}
 
 		$storage = $this->getRootFolder()->getStorage();

psalm.xml

@@ -4,7 +4,7 @@
   - SPDX-License-Identifier: AGPL-3.0-or-later
 -->
 <psalm
-		errorLevel="4"
+		errorLevel="3"
 		resolveFromConfigFile="true"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 		xmlns="https://getpsalm.org/schema/config"