Cleanup dav

- Remove unused class AppEnabledPlugin
- Add more type hinting when possible

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

15 files changed, 117 insertions, 339 deletions

diff --git a/apps/dav/lib/Connector/Sabre/AppEnabledPlugin.php b/apps/dav/lib/Connector/Sabre/AppEnabledPlugin.php
deleted file mode 100644
index 244e5de0683..00000000000
--- a/apps/dav/lib/Connector/Sabre/AppEnabledPlugin.php
+++ /dev/null
@@ -1,88 +0,0 @@
-<?php
-/**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Georg Ehrke <oc.list@georgehrke.com>
- * @author Robin Appelman <robin@icewind.nl>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @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\Connector\Sabre;
-
-use OCP\App\IAppManager;
-use Sabre\DAV\Exception\Forbidden;
-use Sabre\DAV\ServerPlugin;
-
-/**
- * Plugin to check if an app is enabled for the current user
- */
-class AppEnabledPlugin extends ServerPlugin {
-
-	/**
-	 * Reference to main server object
-	 *
-	 * @var \Sabre\DAV\Server
-	 */
-	private $server;
-
-	/**
-	 * @var string
-	 */
-	private $app;
-
-	/**
-	 * @var \OCP\App\IAppManager
-	 */
-	private $appManager;
-
-	/**
-	 * @param string $app
-	 * @param \OCP\App\IAppManager $appManager
-	 */
-	public function __construct($app, IAppManager $appManager) {
-		$this->app = $app;
-		$this->appManager = $appManager;
-	}
-
-	/**
-	 * This initializes the plugin.
-	 *
-	 * This function is called by \Sabre\DAV\Server, after
-	 * addPlugin is called.
-	 *
-	 * This method should set up the required event subscriptions.
-	 *
-	 * @param \Sabre\DAV\Server $server
-	 * @return void
-	 */
-	public function initialize(\Sabre\DAV\Server $server) {
-		$this->server = $server;
-		$this->server->on('beforeMethod:*', [$this, 'checkAppEnabled'], 30);
-	}
-
-	/**
-	 * This method is called before any HTTP after auth and checks if the user has access to the app
-	 *
-	 * @throws \Sabre\DAV\Exception\Forbidden
-	 * @return bool
-	 */
-	public function checkAppEnabled() {
-		if (!$this->appManager->isEnabledForUser($this->app)) {
-			throw new Forbidden();
-		}
-	}
-}
diff --git a/apps/dav/lib/Connector/Sabre/Auth.php b/apps/dav/lib/Connector/Sabre/Auth.php
index d81a3f9d667..1588e5a2e6c 100644
--- a/apps/dav/lib/Connector/Sabre/Auth.php
+++ b/apps/dav/lib/Connector/Sabre/Auth.php
@@ -51,33 +51,19 @@ use Sabre\HTTP\ResponseInterface;
 class Auth extends AbstractBasic {
 	public const DAV_AUTHENTICATED = 'AUTHENTICATED_TO_DAV_BACKEND';
 
-	/** @var ISession */
-	private $session;
-	/** @var Session */
-	private $userSession;
-	/** @var IRequest */
-	private $request;
-	/** @var string */
-	private $currentUser;
-	/** @var Manager */
-	private $twoFactorManager;
-	/** @var Throttler */
-	private $throttler;
+	private ISession $session;
+	private Session $userSession;
+	private IRequest $request;
+	private string $currentUser;
+	private Manager $twoFactorManager;
+	private Throttler $throttler;
 
-	/**
-	 * @param ISession $session
-	 * @param Session $userSession
-	 * @param IRequest $request
-	 * @param Manager $twoFactorManager
-	 * @param Throttler $throttler
-	 * @param string $principalPrefix
-	 */
 	public function __construct(ISession $session,
 								Session $userSession,
 								IRequest $request,
 								Manager $twoFactorManager,
 								Throttler $throttler,
-								$principalPrefix = 'principals/users/') {
+								string $principalPrefix = 'principals/users/') {
 		$this->session = $session;
 		$this->userSession = $userSession;
 		$this->twoFactorManager = $twoFactorManager;
@@ -97,11 +83,8 @@ class Auth extends AbstractBasic {
 	 * account was changed.
 	 *
 	 * @see https://github.com/owncloud/core/issues/13245
-	 *
-	 * @param string $username
-	 * @return bool
 	 */
-	public function isDavAuthenticated($username) {
+	public function isDavAuthenticated(string $username): bool {
 		return !is_null($this->session->get(self::DAV_AUTHENTICATED)) &&
 		$this->session->get(self::DAV_AUTHENTICATED) === $username;
 	}
@@ -144,9 +127,7 @@ class Auth extends AbstractBasic {
 	}
 
 	/**
-	 * @param RequestInterface $request
-	 * @param ResponseInterface $response
-	 * @return array
+	 * @return array{bool, string}
 	 * @throws NotAuthenticated
 	 * @throws ServiceUnavailable
 	 */
@@ -165,10 +146,8 @@ class Auth extends AbstractBasic {
 
 	/**
 	 * Checks whether a CSRF check is required on the request
-	 *
-	 * @return bool
 	 */
-	private function requiresCSRFCheck() {
+	private function requiresCSRFCheck(): bool {
 		// GET requires no check at all
 		if ($this->request->getMethod() === 'GET') {
 			return false;
@@ -203,12 +182,10 @@ class Auth extends AbstractBasic {
 	}
 
 	/**
-	 * @param RequestInterface $request
-	 * @param ResponseInterface $response
-	 * @return array
+	 * @return array{bool, string}
 	 * @throws NotAuthenticated
 	 */
-	private function auth(RequestInterface $request, ResponseInterface $response) {
+	private function auth(RequestInterface $request, ResponseInterface $response): array {
 		$forcedLogout = false;
 
 		if (!$this->request->passesCSRFCheck() &&
diff --git a/apps/dav/lib/Connector/Sabre/BearerAuth.php b/apps/dav/lib/Connector/Sabre/BearerAuth.php
index d28a9cfdb84..5a69d07b002 100644
--- a/apps/dav/lib/Connector/Sabre/BearerAuth.php
+++ b/apps/dav/lib/Connector/Sabre/BearerAuth.php
@@ -31,21 +31,11 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
 class BearerAuth extends AbstractBearer {
-	/** @var IUserSession */
-	private $userSession;
-	/** @var ISession */
-	private $session;
-	/** @var IRequest */
-	private $request;
-	/** @var string */
-	private $principalPrefix;
+	private IUserSession $userSession;
+	private ISession $session;
+	private IRequest $request;
+	private string $principalPrefix;
 
-	/**
-	 * @param IUserSession $userSession
-	 * @param ISession $session
-	 * @param string $principalPrefix
-	 * @param IRequest $request
-	 */
 	public function __construct(IUserSession $userSession,
 								ISession $session,
 								IRequest $request,
@@ -90,7 +80,7 @@ class BearerAuth extends AbstractBearer {
 	 * @param RequestInterface $request
 	 * @param ResponseInterface $response
 	 */
-	public function challenge(RequestInterface $request, ResponseInterface $response) {
+	public function challenge(RequestInterface $request, ResponseInterface $response): void {
 		$response->setStatus(401);
 	}
 }
diff --git a/apps/dav/lib/Connector/Sabre/BlockLegacyClientPlugin.php b/apps/dav/lib/Connector/Sabre/BlockLegacyClientPlugin.php
index 8e2ea4d4e16..830c92d2c30 100644
--- a/apps/dav/lib/Connector/Sabre/BlockLegacyClientPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/BlockLegacyClientPlugin.php
@@ -28,6 +28,7 @@ namespace OCA\DAV\Connector\Sabre;
 use OCP\IConfig;
 use Sabre\DAV\ServerPlugin;
 use Sabre\HTTP\RequestInterface;
+use Sabre\DAV\Server;
 
 /**
  * Class BlockLegacyClientPlugin is used to detect old legacy sync clients and
@@ -36,23 +37,17 @@ use Sabre\HTTP\RequestInterface;
  * @package OCA\DAV\Connector\Sabre
  */
 class BlockLegacyClientPlugin extends ServerPlugin {
-	/** @var \Sabre\DAV\Server */
-	protected $server;
-	/** @var IConfig */
-	protected $config;
+	protected Server $server;
+	protected IConfig $config;
 
-	/**
-	 * @param IConfig $config
-	 */
 	public function __construct(IConfig $config) {
 		$this->config = $config;
 	}
 
 	/**
-	 * @param \Sabre\DAV\Server $server
 	 * @return void
 	 */
-	public function initialize(\Sabre\DAV\Server $server) {
+	public function initialize(Server $server) {
 		$this->server = $server;
 		$this->server->on('beforeMethod:*', [$this, 'beforeHandler'], 200);
 	}
diff --git a/apps/dav/lib/Connector/Sabre/CachingTree.php b/apps/dav/lib/Connector/Sabre/CachingTree.php
index eb1233d3540..81ffd47a977 100644
--- a/apps/dav/lib/Connector/Sabre/CachingTree.php
+++ b/apps/dav/lib/Connector/Sabre/CachingTree.php
@@ -28,17 +28,18 @@ use Sabre\DAV\Tree;
 class CachingTree extends Tree {
 	/**
 	 * Store a node in the cache
-	 *
-	 * @param Node $node
-	 * @param null|string $path
 	 */
-	public function cacheNode(Node $node, $path = null) {
+	public function cacheNode(Node $node, ?string $path = null): void {
 		if (is_null($path)) {
 			$path = $node->getPath();
 		}
 		$this->cache[trim($path, '/')] = $node;
 	}
 
+	/**
+	 * @param string $path
+	 * @return void
+	 */
 	public function markDirty($path) {
 		// We don't care enough about sub-paths
 		// flushing the entire cache
diff --git a/apps/dav/lib/Connector/Sabre/ChecksumList.php b/apps/dav/lib/Connector/Sabre/ChecksumList.php
index 74cdc98ef4f..344e6a4ab3c 100644
--- a/apps/dav/lib/Connector/Sabre/ChecksumList.php
+++ b/apps/dav/lib/Connector/Sabre/ChecksumList.php
@@ -35,12 +35,9 @@ class ChecksumList implements XmlSerializable {
 	public const NS_OWNCLOUD = 'http://owncloud.org/ns';
 
 	/** @var string[] of TYPE:CHECKSUM */
-	private $checksums;
+	private array $checksums;
 
-	/**
-	 * @param string $checksum
-	 */
-	public function __construct($checksum) {
+	public function __construct(string $checksum) {
 		$this->checksums = explode(',', $checksum);
 	}
 
diff --git a/apps/dav/lib/Connector/Sabre/ChecksumUpdatePlugin.php b/apps/dav/lib/Connector/Sabre/ChecksumUpdatePlugin.php
index 3247259357f..c023d918c42 100644
--- a/apps/dav/lib/Connector/Sabre/ChecksumUpdatePlugin.php
+++ b/apps/dav/lib/Connector/Sabre/ChecksumUpdatePlugin.php
@@ -26,14 +26,12 @@ namespace OCA\DAV\Connector\Sabre;
 use Sabre\DAV\ServerPlugin;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
+use Sabre\DAV\Server;
 
 class ChecksumUpdatePlugin extends ServerPlugin {
-	/**
-	 * @var \Sabre\DAV\Server
-	 */
-	protected $server;
+	protected Server $server;
 
-	public function initialize(\Sabre\DAV\Server $server) {
+	public function initialize(Server $server) {
 		$this->server = $server;
 		$server->on('method:PATCH', [$this, 'httpPatch']);
 	}
@@ -42,6 +40,7 @@ class ChecksumUpdatePlugin extends ServerPlugin {
 		return 'checksumupdate';
 	}
 
+	/** @return string[] */
 	public function getHTTPMethods($path): array {
 		$tree = $this->server->tree;
 
@@ -55,6 +54,7 @@ class ChecksumUpdatePlugin extends ServerPlugin {
 		return [];
 	}
 
+	/** @return string[] */
 	public function getFeatures(): array {
 		return ['nextcloud-checksum-update'];
 	}
diff --git a/apps/dav/lib/Connector/Sabre/CommentPropertiesPlugin.php b/apps/dav/lib/Connector/Sabre/CommentPropertiesPlugin.php
index 82980553fa8..f9a087daeb0 100644
--- a/apps/dav/lib/Connector/Sabre/CommentPropertiesPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/CommentPropertiesPlugin.php
@@ -29,22 +29,17 @@ use OCP\Comments\ICommentsManager;
 use OCP\IUserSession;
 use Sabre\DAV\PropFind;
 use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\Server;
 
 class CommentPropertiesPlugin extends ServerPlugin {
 	public const PROPERTY_NAME_HREF = '{http://owncloud.org/ns}comments-href';
 	public const PROPERTY_NAME_COUNT = '{http://owncloud.org/ns}comments-count';
 	public const PROPERTY_NAME_UNREAD = '{http://owncloud.org/ns}comments-unread';
 
-	/** @var  \Sabre\DAV\Server */
-	protected $server;
-
-	/** @var ICommentsManager */
-	private $commentsManager;
-
-	/** @var IUserSession */
-	private $userSession;
-
-	private $cachedUnreadCount = [];
+	protected Server $server;
+	private ICommentsManager $commentsManager;
+	private IUserSession $userSession;
+	private array $cachedUnreadCount = [];
 
 	public function __construct(ICommentsManager $commentsManager, IUserSession $userSession) {
 		$this->commentsManager = $commentsManager;
@@ -67,7 +62,7 @@ class CommentPropertiesPlugin extends ServerPlugin {
 		$this->server->on('propFind', [$this, 'handleGetProperties']);
 	}
 
-	private function cacheDirectory(Directory $directory) {
+	private function cacheDirectory(Directory $directory): void {
 		$children = $directory->getChildren();
 
 		$ids = [];
@@ -109,14 +104,14 @@ class CommentPropertiesPlugin extends ServerPlugin {
 		}
 
 		// need prefetch ?
-		if ($node instanceof \OCA\DAV\Connector\Sabre\Directory
+		if ($node instanceof Directory
 			&& $propFind->getDepth() !== 0
 			&& !is_null($propFind->getStatus(self::PROPERTY_NAME_UNREAD))
 		) {
 			$this->cacheDirectory($node);
 		}
 
-		$propFind->handle(self::PROPERTY_NAME_COUNT, function () use ($node) {
+		$propFind->handle(self::PROPERTY_NAME_COUNT, function () use ($node): int {
 			return $this->commentsManager->getNumberOfCommentsForObject('files', (string)$node->getId());
 		});
 
@@ -124,19 +119,15 @@ class CommentPropertiesPlugin extends ServerPlugin {
 			return $this->getCommentsLink($node);
 		});
 
-		$propFind->handle(self::PROPERTY_NAME_UNREAD, function () use ($node) {
-			if (isset($this->cachedUnreadCount[$node->getId()])) {
-				return $this->cachedUnreadCount[$node->getId()];
-			}
-			return $this->getUnreadCount($node);
+		$propFind->handle(self::PROPERTY_NAME_UNREAD, function () use ($node): ?bool {
+			return $this->cachedUnreadCount[$node->getId()] ?? $this->getUnreadCount($node);
 		});
 	}
 
 	/**
-	 * returns a reference to the comments node
+	 * Returns a reference to the comments node
 	 *
-	 * @param Node $node
-	 * @return mixed|string
+	 * @return array|string|null
 	 */
 	public function getCommentsLink(Node $node) {
 		$href = $this->server->getBaseUri();
@@ -151,13 +142,10 @@ class CommentPropertiesPlugin extends ServerPlugin {
 	}
 
 	/**
-	 * returns the number of unread comments for the currently logged in user
+	 * Returns the number of unread comments for the currently logged in user
 	 * on the given file or directory node
-	 *
-	 * @param Node $node
-	 * @return Int|null
 	 */
-	public function getUnreadCount(Node $node) {
+	public function getUnreadCount(Node $node): ?int {
 		$user = $this->userSession->getUser();
 		if (is_null($user)) {
 			return null;
diff --git a/apps/dav/lib/Connector/Sabre/CopyEtagHeaderPlugin.php b/apps/dav/lib/Connector/Sabre/CopyEtagHeaderPlugin.php
index 029e631f4d9..5dd0dc6f231 100644
--- a/apps/dav/lib/Connector/Sabre/CopyEtagHeaderPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/CopyEtagHeaderPlugin.php
@@ -27,6 +27,7 @@ namespace OCA\DAV\Connector\Sabre;
 use Sabre\DAV\Exception\NotFound;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
+use Sabre\DAV\Server;
 
 /**
  * Copies the "Etag" header to "OC-Etag" after any request.
@@ -34,9 +35,8 @@ use Sabre\HTTP\ResponseInterface;
  * or mangle Etag headers.
  */
 class CopyEtagHeaderPlugin extends \Sabre\DAV\ServerPlugin {
+	private Server $server;
 
-	/** @var \Sabre\DAV\Server */
-	private $server;
 	/**
 	 * This initializes the plugin.
 	 *
diff --git a/apps/dav/lib/Connector/Sabre/Directory.php b/apps/dav/lib/Connector/Sabre/Directory.php
index ed98b5050f8..5280511d5be 100644
--- a/apps/dav/lib/Connector/Sabre/Directory.php
+++ b/apps/dav/lib/Connector/Sabre/Directory.php
@@ -54,40 +54,27 @@ use Sabre\DAV\Exception\NotFound;
 use Sabre\DAV\Exception\ServiceUnavailable;
 use Sabre\DAV\IFile;
 use Sabre\DAV\INode;
+use OCP\Share\IManager as IShareManager;
 
 class Directory extends \OCA\DAV\Connector\Sabre\Node implements \Sabre\DAV\ICollection, \Sabre\DAV\IQuota, \Sabre\DAV\IMoveTarget, \Sabre\DAV\ICopyTarget {
 
 	/**
 	 * Cached directory content
-	 *
 	 * @var \OCP\Files\FileInfo[]
 	 */
-	private $dirContent;
+	private ?array $dirContent = null;
 
-	/**
-	 * Cached quota info
-	 *
-	 * @var array
-	 */
-	private $quotaInfo;
-
-	/**
-	 * @var ObjectTree|null
-	 */
-	private $tree;
+	/** Cached quota info */
+	private ?array $quotaInfo = null;
+	private ?ObjectTree $tree = null;
 
 	/** @var array<string, array<int, FileMetadata>> */
 	private array $metadata = [];
 
 	/**
 	 * Sets up the node, expects a full path name
-	 *
-	 * @param \OC\Files\View $view
-	 * @param \OCP\Files\FileInfo $info
-	 * @param ObjectTree|null $tree
-	 * @param \OCP\Share\IManager $shareManager
 	 */
-	public function __construct(View $view, FileInfo $info, $tree = null, $shareManager = null) {
+	public function __construct(View $view, FileInfo $info, ?ObjectTree $tree = null, IShareManager $shareManager = null) {
 		parent::__construct($view, $info, $shareManager);
 		$this->tree = $tree;
 	}
diff --git a/apps/dav/lib/Connector/Sabre/DummyGetResponsePlugin.php b/apps/dav/lib/Connector/Sabre/DummyGetResponsePlugin.php
index 3a8469e99b4..bc6c6f5c25f 100644
--- a/apps/dav/lib/Connector/Sabre/DummyGetResponsePlugin.php
+++ b/apps/dav/lib/Connector/Sabre/DummyGetResponsePlugin.php
@@ -28,6 +28,7 @@ namespace OCA\DAV\Connector\Sabre;
 
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
+use Sabre\DAV\Server;
 
 /**
  * Class DummyGetResponsePlugin is a plugin used to not show a "Not implemented"
@@ -43,8 +44,7 @@ use Sabre\HTTP\ResponseInterface;
  * @package OCA\DAV\Connector\Sabre
  */
 class DummyGetResponsePlugin extends \Sabre\DAV\ServerPlugin {
-	/** @var \Sabre\DAV\Server */
-	protected $server;
+	protected Server $server;
 
 	/**
 	 * @param \Sabre\DAV\Server $server
diff --git a/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php b/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php
index e89ce3a8037..c803358ede1 100644
--- a/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php
@@ -83,16 +83,13 @@ class ExceptionLoggerPlugin extends \Sabre\DAV\ServerPlugin {
 		RequestedRangeNotSatisfiable::class => true,
 	];
 
-	/** @var string */
-	private $appName;
-
+	private string $appName;
 	private LoggerInterface $logger;
 
 	/**
 	 * @param string $loggerAppName app name to use when logging
-	 * @param LoggerInterface $logger
 	 */
-	public function __construct($loggerAppName, LoggerInterface $logger) {
+	public function __construct(string $loggerAppName, LoggerInterface $logger) {
 		$this->appName = $loggerAppName;
 		$this->logger = $logger;
 	}
@@ -114,9 +111,8 @@ class ExceptionLoggerPlugin extends \Sabre\DAV\ServerPlugin {
 
 	/**
 	 * Log exception
-	 *
 	 */
-	public function logException(\Throwable $ex) {
+	public function logException(\Throwable $ex): void {
 		$exceptionClass = get_class($ex);
 		if (isset($this->nonFatalExceptions[$exceptionClass]) ||
 			(
@@ -128,11 +124,12 @@ class ExceptionLoggerPlugin extends \Sabre\DAV\ServerPlugin {
 				'app' => $this->appName,
 				'exception' => $ex,
 			]);
-		} else {
-			$this->logger->critical($ex->getMessage(), [
-				'app' => $this->appName,
-				'exception' => $ex,
-			]);
+			return; 
 		}
+
+		$this->logger->critical($ex->getMessage(), [
+			'app' => $this->appName,
+			'exception' => $ex,
+		]);
 	}
 }
diff --git a/apps/dav/lib/Connector/Sabre/FilesPlugin.php b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
index 9c4f912610b..9474ed91f85 100644
--- a/apps/dav/lib/Connector/Sabre/FilesPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
@@ -49,6 +49,7 @@ use Sabre\DAV\IFile;
 use Sabre\DAV\PropFind;
 use Sabre\DAV\PropPatch;
 use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\Server;
 use Sabre\DAV\Tree;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
@@ -84,66 +85,28 @@ class FilesPlugin extends ServerPlugin {
 	public const SUBFILE_COUNT_PROPERTYNAME = '{http://nextcloud.org/ns}contained-file-count';
 	public const FILE_METADATA_SIZE = '{http://nextcloud.org/ns}file-metadata-size';
 
-	/**
-	 * Reference to main server object
-	 *
-	 * @var \Sabre\DAV\Server
-	 */
-	private $server;
-
-	/**
-	 * @var Tree
-	 */
-	private $tree;
-
-	/**
-	 * @var IUserSession
-	 */
-	private $userSession;
+	/** Reference to main server object */
+	private Server $server;
+	private Tree $tree;
+	private IUserSession $userSession;
 
 	/**
 	 * Whether this is public webdav.
 	 * If true, some returned information will be stripped off.
-	 *
-	 * @var bool
-	 */
-	private $isPublic;
-
-	/**
-	 * @var bool
 	 */
-	private $downloadAttachment;
+	private bool $isPublic;
+	private bool $downloadAttachment;
+	private IConfig $config;
+	private IRequest $request;
+	private IPreview $previewManager;
 
-	/**
-	 * @var IConfig
-	 */
-	private $config;
-
-	/**
-	 * @var IRequest
-	 */
-	private $request;
-
-	/**
-	 * @var IPreview
-	 */
-	private $previewManager;
-
-	/**
-	 * @param Tree $tree
-	 * @param IConfig $config
-	 * @param IRequest $request
-	 * @param IPreview $previewManager
-	 * @param bool $isPublic
-	 * @param bool $downloadAttachment
-	 */
 	public function __construct(Tree $tree,
 								IConfig $config,
 								IRequest $request,
 								IPreview $previewManager,
 								IUserSession $userSession,
-								$isPublic = false,
-								$downloadAttachment = true) {
+								bool $isPublic = false,
+								bool $downloadAttachment = true) {
 		$this->tree = $tree;
 		$this->config = $config;
 		$this->request = $request;
@@ -161,10 +124,9 @@ class FilesPlugin extends ServerPlugin {
 	 *
 	 * This method should set up the required event subscriptions.
 	 *
-	 * @param \Sabre\DAV\Server $server
 	 * @return void
 	 */
-	public function initialize(\Sabre\DAV\Server $server) {
+	public function initialize(Server $server) {
 		$server->xml->namespaceMap[self::NS_OWNCLOUD] = 'oc';
 		$server->xml->namespaceMap[self::NS_NEXTCLOUD] = 'nc';
 		$server->protectedProperties[] = self::FILEID_PROPERTYNAME;
@@ -347,7 +309,7 @@ class FilesPlugin extends ServerPlugin {
 				);
 			});
 
-			$propFind->handle(self::OCM_SHARE_PERMISSIONS_PROPERTYNAME, function () use ($node, $httpRequest) {
+			$propFind->handle(self::OCM_SHARE_PERMISSIONS_PROPERTYNAME, function () use ($node, $httpRequest): ?string {
 				$user = $this->userSession->getUser();
 				if ($user === null) {
 					return null;
@@ -359,11 +321,11 @@ class FilesPlugin extends ServerPlugin {
 				return json_encode($ocmPermissions);
 			});
 
-			$propFind->handle(self::GETETAG_PROPERTYNAME, function () use ($node) {
+			$propFind->handle(self::GETETAG_PROPERTYNAME, function () use ($node): string {
 				return $node->getETag();
 			});
 
-			$propFind->handle(self::OWNER_ID_PROPERTYNAME, function () use ($node) {
+			$propFind->handle(self::OWNER_ID_PROPERTYNAME, function () use ($node): ?string {
 				$owner = $node->getOwner();
 				if (!$owner) {
 					return null;
@@ -371,7 +333,7 @@ class FilesPlugin extends ServerPlugin {
 					return $owner->getUID();
 				}
 			});
-			$propFind->handle(self::OWNER_DISPLAY_NAME_PROPERTYNAME, function () use ($node) {
+			$propFind->handle(self::OWNER_DISPLAY_NAME_PROPERTYNAME, function () use ($node): ?string {
 				$owner = $node->getOwner();
 				if (!$owner) {
 					return null;
@@ -383,14 +345,14 @@ class FilesPlugin extends ServerPlugin {
 			$propFind->handle(self::HAS_PREVIEW_PROPERTYNAME, function () use ($node) {
 				return json_encode($this->previewManager->isAvailable($node->getFileInfo()));
 			});
-			$propFind->handle(self::SIZE_PROPERTYNAME, function () use ($node) {
+			$propFind->handle(self::SIZE_PROPERTYNAME, function () use ($node): int {
 				return $node->getSize();
 			});
 			$propFind->handle(self::MOUNT_TYPE_PROPERTYNAME, function () use ($node) {
 				return $node->getFileInfo()->getMountPoint()->getMountType();
 			});
 
-			$propFind->handle(self::SHARE_NOTE, function () use ($node, $httpRequest) {
+			$propFind->handle(self::SHARE_NOTE, function () use ($node, $httpRequest): ?string {
 				$user = $this->userSession->getUser();
 				if ($user === null) {
 					return null;
@@ -569,10 +531,7 @@ class FilesPlugin extends ServerPlugin {
 			if (empty($etag)) {
 				return false;
 			}
-			if ($node->setEtag($etag) !== -1) {
-				return true;
-			}
-			return false;
+			return $node->setEtag($etag) !== -1;
 		});
 		$propPatch->handle(self::CREATIONDATE_PROPERTYNAME, function ($time) use ($node) {
 			if (empty($time)) {
diff --git a/apps/dav/lib/Connector/Sabre/ServerFactory.php b/apps/dav/lib/Connector/Sabre/ServerFactory.php
index 635645ed992..8f1f710ca5e 100644
--- a/apps/dav/lib/Connector/Sabre/ServerFactory.php
+++ b/apps/dav/lib/Connector/Sabre/ServerFactory.php
@@ -48,25 +48,16 @@ use Sabre\DAV\Auth\Plugin;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
 class ServerFactory {
-	/** @var IConfig */
-	private $config;
+	private IConfig $config;
 	private LoggerInterface $logger;
-	/** @var IDBConnection */
-	private $databaseConnection;
-	/** @var IUserSession */
-	private $userSession;
-	/** @var IMountManager */
-	private $mountManager;
-	/** @var ITagManager */
-	private $tagManager;
-	/** @var IRequest */
-	private $request;
-	/** @var IPreview  */
-	private $previewManager;
-	/** @var EventDispatcherInterface */
-	private $eventDispatcher;
-	/** @var IL10N */
-	private $l10n;
+	private IDBConnection $databaseConnection;
+	private IUserSession $userSession;
+	private IMountManager $mountManager;
+	private ITagManager $tagManager;
+	private IRequest $request;
+	private IPreview $previewManager;
+	private EventDispatcherInterface $eventDispatcher;
+	private IL10N $l10n;
 
 	public function __construct(
 		IConfig $config,
@@ -93,16 +84,12 @@ class ServerFactory {
 	}
 
 	/**
-	 * @param string $baseUri
-	 * @param string $requestUri
-	 * @param Plugin $authPlugin
 	 * @param callable $viewCallBack callback that should return the view for the dav endpoint
-	 * @return Server
 	 */
-	public function createServer($baseUri,
-								 $requestUri,
+	public function createServer(string $baseUri,
+								 string $requestUri,
 								 Plugin $authPlugin,
-								 callable $viewCallBack) {
+								 callable $viewCallBack): Server {
 		// Fire up server
 		$objectTree = new \OCA\DAV\Connector\Sabre\ObjectTree();
 		$server = new \OCA\DAV\Connector\Sabre\Server($objectTree);
diff --git a/apps/dav/lib/Connector/Sabre/SharesPlugin.php b/apps/dav/lib/Connector/Sabre/SharesPlugin.php
index 57c91e05a8c..9fa6775c3b5 100644
--- a/apps/dav/lib/Connector/Sabre/SharesPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/SharesPlugin.php
@@ -30,10 +30,14 @@ namespace OCA\DAV\Connector\Sabre;
 
 use OCA\DAV\Connector\Sabre\Node as DavNode;
 use OCP\Files\Folder;
+use OCP\Files\Node;
 use OCP\Files\NotFoundException;
 use OCP\IUserSession;
 use OCP\Share\IShare;
+use OCP\Share\IManager;
 use Sabre\DAV\PropFind;
+use Sabre\DAV\Tree;
+use Sabre\DAV\Server;
 
 /**
  * Sabre Plugin to provide share-related properties
@@ -50,36 +54,20 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 	 * @var \Sabre\DAV\Server
 	 */
 	private $server;
-
-	/** @var \OCP\Share\IManager */
-	private $shareManager;
-
-	/** @var \Sabre\DAV\Tree */
-	private $tree;
-
-	/** @var string */
-	private $userId;
-
-	/** @var \OCP\Files\Folder */
-	private $userFolder;
-
+	private IManager $shareManager;
+	private Tree $tree;
+	private string $userId;
+	private Folder $userFolder;
 	/** @var IShare[][] */
-	private $cachedShares = [];
-
+	private array $cachedShares = [];
 	/** @var string[] */
-	private $cachedFolders = [];
+	private array $cachedFolders = [];
 
-	/**
-	 * @param \Sabre\DAV\Tree $tree tree
-	 * @param IUserSession $userSession user session
-	 * @param \OCP\Files\Folder $userFolder user home folder
-	 * @param \OCP\Share\IManager $shareManager share manager
-	 */
 	public function __construct(
-		\Sabre\DAV\Tree $tree,
+		Tree $tree,
 		IUserSession $userSession,
-		\OCP\Files\Folder $userFolder,
-		\OCP\Share\IManager $shareManager
+		Folder $userFolder,
+		IManager $shareManager
 	) {
 		$this->tree = $tree;
 		$this->shareManager = $shareManager;
@@ -95,9 +83,9 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 	 *
 	 * This method should set up the required event subscriptions.
 	 *
-	 * @param \Sabre\DAV\Server $server
+	 * @return void
 	 */
-	public function initialize(\Sabre\DAV\Server $server) {
+	public function initialize(Server $server) {
 		$server->xml->namespaceMap[self::NS_OWNCLOUD] = 'oc';
 		$server->xml->elementMap[self::SHARETYPES_PROPERTYNAME] = ShareTypeList::class;
 		$server->protectedProperties[] = self::SHARETYPES_PROPERTYNAME;
@@ -108,10 +96,10 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 	}
 
 	/**
-	 * @param \OCP\Files\Node $node
+	 * @param Node $node
 	 * @return IShare[]
 	 */
-	private function getShare(\OCP\Files\Node $node): array {
+	private function getShare(Node $node): array {
 		$result = [];
 		$requestedShareTypes = [
 			IShare::TYPE_USER,
@@ -209,7 +197,7 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 			}
 		}
 
-		$propFind->handle(self::SHARETYPES_PROPERTYNAME, function () use ($sabreNode) {
+		$propFind->handle(self::SHARETYPES_PROPERTYNAME, function () use ($sabreNode): ShareTypeList {
 			$shares = $this->getShares($sabreNode);
 
 			$shareTypes = array_unique(array_map(function (IShare $share) {
@@ -219,7 +207,7 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 			return new ShareTypeList($shareTypes);
 		});
 
-		$propFind->handle(self::SHAREES_PROPERTYNAME, function () use ($sabreNode) {
+		$propFind->handle(self::SHAREES_PROPERTYNAME, function () use ($sabreNode): ShareeList {
 			$shares = $this->getShares($sabreNode);
 
 			return new ShareeList($shares);