2 files changed, 42 insertions, 27 deletions

diff --git a/apps/files_sharing/lib/Controller/PublicPreviewController.php b/apps/files_sharing/lib/Controller/PublicPreviewController.php
index 4a16afa7ac0..98c4d8cafb4 100644
--- a/apps/files_sharing/lib/Controller/PublicPreviewController.php
+++ b/apps/files_sharing/lib/Controller/PublicPreviewController.php
@@ -136,7 +136,7 @@ class PublicPreviewController extends PublicShareController {
 	 * @param $token
 	 * @return DataResponse|FileDisplayResponse
 	 */
-	public function directLink($token) {
+	public function directLink(string $token) {
 		// No token no image
 		if ($token === '') {
 			return new DataResponse([], Http::STATUS_BAD_REQUEST);
diff --git a/apps/files_sharing/lib/Controller/ShareAPIController.php b/apps/files_sharing/lib/Controller/ShareAPIController.php
index c72fd8ba8af..59089390667 100644
--- a/apps/files_sharing/lib/Controller/ShareAPIController.php
+++ b/apps/files_sharing/lib/Controller/ShareAPIController.php
@@ -45,6 +45,7 @@ declare(strict_types=1);
 namespace OCA\Files_Sharing\Controller;
 
 use OC\Files\FileInfo;
+use OC\Files\Storage\Wrapper\Wrapper;
 use OCA\Files_Sharing\Exceptions\SharingRightsException;
 use OCA\Files_Sharing\External\Storage;
 use OCA\Files_Sharing\SharedStorage;
@@ -524,14 +525,7 @@ class ShareAPIController extends OCSController {
 			$permissions &= ~($permissions & ~$node->getPermissions());
 		}
 
-		if ($share->getNode()->getStorage()->instanceOfStorage(SharedStorage::class)) {
-			/** @var \OCA\Files_Sharing\SharedStorage $storage */
-			$inheritedAttributes = $share->getNode()->getStorage()->getShare()->getAttributes();
-			if ($inheritedAttributes !== null && $inheritedAttributes->getAttribute('permissions', 'download') === false) {
-				$share->setHideDownload(true);
-			}
-		}
-
+		$this->checkInheritedAttributes($share);
 
 		if ($shareType === IShare::TYPE_USER) {
 			// Valid user is required to share
@@ -1110,6 +1104,25 @@ class ShareAPIController extends OCSController {
 			$share->setNote($note);
 		}
 
+		$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
+
+		// get the node with the point of view of the current user
+		$nodes = $userFolder->getById($share->getNode()->getId());
+		if (count($nodes) > 0) {
+			$node = $nodes[0];
+			$storage = $node->getStorage();
+			if ($storage && $storage->instanceOfStorage(SharedStorage::class)) {
+				/** @var \OCA\Files_Sharing\SharedStorage $storage */
+				$inheritedAttributes = $storage->getShare()->getAttributes();
+				if ($inheritedAttributes !== null && $inheritedAttributes->getAttribute('permissions', 'download') === false) {
+					if ($hideDownload === 'false') {
+						throw new OCSBadRequestException($this->l->t('Cannot increase permissions'));
+					}
+					$share->setHideDownload(true);
+				}
+			}
+		}
+
 		/**
 		 * expirationdate, password and publicUpload only make sense for link shares
 		 */
@@ -1135,24 +1148,6 @@ class ShareAPIController extends OCSController {
 				$share->setHideDownload(false);
 			}
 
-			$userFolder = $this->rootFolder->getUserFolder($this->currentUser);
-			// get the node with the point of view of the current user
-			$nodes = $userFolder->getById($share->getNode()->getId());
-			if (count($nodes) > 0) {
-				$node = $nodes[0];
-				$storage = $node->getStorage();
-				if ($storage->instanceOfStorage(SharedStorage::class)) {
-					/** @var \OCA\Files_Sharing\SharedStorage $storage */
-					$inheritedAttributes = $storage->getShare()->getAttributes();
-					if ($inheritedAttributes !== null && $inheritedAttributes->getAttribute('permissions', 'download') === false) {
-						if ($hideDownload === 'false') {
-							throw new OCSBadRequestException($this->l->t('Cannot increate permissions'));
-						}
-						$share->setHideDownload(true);
-					}
-				}
-			}
-
 			$newPermissions = null;
 			if ($publicUpload === 'true') {
 				$newPermissions = Constants::PERMISSION_READ | Constants::PERMISSION_CREATE | Constants::PERMISSION_UPDATE | Constants::PERMISSION_DELETE;
@@ -1905,4 +1900,24 @@ class ShareAPIController extends OCSController {
 
 		return $share;
 	}
+
+	private function checkInheritedAttributes(IShare $share): void {
+		if ($share->getNode()->getStorage()->instanceOfStorage(SharedStorage::class)) {
+			$storage = $share->getNode()->getStorage();
+			if ($storage instanceof Wrapper) {
+				$storage = $storage->getInstanceOfStorage(SharedStorage::class);
+				if ($storage === null) {
+					throw new \RuntimeException('Should not happen, instanceOfStorage but getInstanceOfStorage return null');
+				}
+			} else {
+				throw new \RuntimeException('Should not happen, instanceOfStorage but not a wrapper');
+			}
+			/** @var \OCA\Files_Sharing\SharedStorage $storage */
+			$inheritedAttributes = $storage->getShare()->getAttributes();
+			if ($inheritedAttributes !== null && $inheritedAttributes->getAttribute('permissions', 'download') === false) {
+				$share->setHideDownload(true);
+			}
+		}
+
+	}
 }