feat(dav): Allow UploadHome to handle public shares

Signed-off-by: provokateurin <kate@provokateurin.de>

Author: provokateurin

apps/dav/lib/RootCollection.php

@@ -160,6 +160,7 @@ public function __construct() {
 			Server::get(CleanupService::class),
 			$rootFolder,
 			$userSession,
+			$shareManager,
 		);
 		$uploadCollection->disableListing = $disableListing;
 

apps/dav/lib/Upload/RootCollection.php

@@ -11,6 +11,7 @@
 
 use OCP\Files\IRootFolder;
 use OCP\IUserSession;
+use OCP\Share\IManager;
 use Sabre\DAVACL\AbstractPrincipalCollection;
 use Sabre\DAVACL\PrincipalBackend;
 
@@ -22,6 +23,7 @@ public function __construct(
 		private CleanupService $cleanupService,
 		private IRootFolder $rootFolder,
 		private IUserSession $userSession,
+		private IManager $shareManager,
 	) {
 		parent::__construct($principalBackend, $principalPrefix);
 	}
@@ -30,7 +32,13 @@ public function __construct(
 	 * @inheritdoc
 	 */
 	public function getChildForPrincipal(array $principalInfo): UploadHome {
-		return new UploadHome($principalInfo, $this->cleanupService, $this->rootFolder, $this->userSession);
+		return new UploadHome(
+			$principalInfo,
+			$this->cleanupService,
+			$this->rootFolder,
+			$this->userSession,
+			$this->shareManager,
+		);
 	}
 
 	/**

apps/dav/lib/Upload/UploadHome.php

@@ -25,13 +25,19 @@ public function __construct(
 		private readonly CleanupService $cleanupService,
 		private readonly IRootFolder $rootFolder,
 		private readonly IUserSession $userSession,
+		private readonly \OCP\Share\IManager $shareManager,
 	) {
-		$user = $this->userSession->getUser();
-		if (!$user) {
-			throw new Forbidden('Not logged in');
-		}
+		[$prefix, $name] = \Sabre\Uri\split($principalInfo['uri']);
+		if ($prefix === 'principals/shares') {
+			$this->uid = $this->shareManager->getShareByToken($name)->getShareOwner();
+		} else {
+			$user = $this->userSession->getUser();
+			if (!$user) {
+				throw new Forbidden('Not logged in');
+			}
 
-		$this->uid = $user->getUID();
+			$this->uid = $user->getUID();
+		}
 	}
 
 	public function createFile($name, $data = null) {