2 files changed, 56 insertions, 0 deletions

diff --git a/apps/dav/lib/connector/sabre/filesplugin.php b/apps/dav/lib/connector/sabre/filesplugin.php
index fb2af554c68..8b54291793a 100644
--- a/apps/dav/lib/connector/sabre/filesplugin.php
+++ b/apps/dav/lib/connector/sabre/filesplugin.php
@@ -45,6 +45,7 @@ class FilesPlugin extends \Sabre\DAV\ServerPlugin {
 	const FILEID_PROPERTYNAME = '{http://owncloud.org/ns}id';
 	const INTERNAL_FILEID_PROPERTYNAME = '{http://owncloud.org/ns}fileid';
 	const PERMISSIONS_PROPERTYNAME = '{http://owncloud.org/ns}permissions';
+	const SHARE_PERMISSIONS_PROPERTYNAME = '{http://owncloud.org/ns}share-permissions';
 	const DOWNLOADURL_PROPERTYNAME = '{http://owncloud.org/ns}downloadURL';
 	const SIZE_PROPERTYNAME = '{http://owncloud.org/ns}size';
 	const GETETAG_PROPERTYNAME = '{DAV:}getetag';
@@ -116,6 +117,7 @@ class FilesPlugin extends \Sabre\DAV\ServerPlugin {
 		$server->protectedProperties[] = self::FILEID_PROPERTYNAME;
 		$server->protectedProperties[] = self::INTERNAL_FILEID_PROPERTYNAME;
 		$server->protectedProperties[] = self::PERMISSIONS_PROPERTYNAME;
+		$server->protectedProperties[] = self::SHARE_PERMISSIONS_PROPERTYNAME;
 		$server->protectedProperties[] = self::SIZE_PROPERTYNAME;
 		$server->protectedProperties[] = self::DOWNLOADURL_PROPERTYNAME;
 		$server->protectedProperties[] = self::OWNER_ID_PROPERTYNAME;
@@ -245,6 +247,10 @@ class FilesPlugin extends \Sabre\DAV\ServerPlugin {
 				return $perms;
 			});
 
+			$propFind->handle(self::SHARE_PERMISSIONS_PROPERTYNAME, function() use ($node) {
+				return $node->getSharePermissions();
+			});
+
 			$propFind->handle(self::GETETAG_PROPERTYNAME, function() use ($node) {
 				return $node->getETag();
 			});
diff --git a/apps/dav/lib/connector/sabre/node.php b/apps/dav/lib/connector/sabre/node.php
index 95a5f0a8749..9867fe66cd3 100644
--- a/apps/dav/lib/connector/sabre/node.php
+++ b/apps/dav/lib/connector/sabre/node.php
@@ -30,6 +30,7 @@
 
 namespace OCA\DAV\Connector\Sabre;
 
+use OC\Files\Mount\MoveableMount;
 use OCA\DAV\Connector\Sabre\Exception\InvalidPath;
 
 
@@ -214,6 +215,55 @@ abstract class Node implements \Sabre\DAV\INode {
 	}
 
 	/**
+	 * @return int
+	 */
+	public function getSharePermissions() {
+		$storage = $this->info->getStorage();
+
+		$path = $this->info->getInternalPath();
+
+		if ($storage->instanceOfStorage('\OC\Files\Storage\Shared')) {
+			/** @var \OC\Files\Storage\Shared $storage */
+			$permissions = (int)$storage->getShare()['permissions'];
+		} else {
+			$permissions = $storage->getPermissions($path);
+		}
+
+		/*
+		 * We can always share non moveable mount points with DELETE and UPDATE
+		 * Eventually we need to do this properly
+		 */
+		$mountpoint = $this->info->getMountPoint();
+		if (!($mountpoint instanceof MoveableMount)) {
+			$mountpointpath = $mountpoint->getMountPoint();
+			if (substr($mountpointpath, -1) === '/') {
+				$mountpointpath = substr($mountpointpath, 0, -1);
+			}
+
+			if ($mountpointpath === $this->info->getPath()) {
+				$permissions |= \OCP\Constants::PERMISSION_DELETE | \OCP\Constants::PERMISSION_UPDATE;
+			}
+		}
+
+		/*
+		 * Without sharing permissions there are also no other permissions
+		 */
+		if (!($permissions & \OCP\Constants::PERMISSION_SHARE) ||
+			!($permissions & \OCP\Constants::PERMISSION_READ)) {
+			return 0;
+		}
+
+		/*
+		 * Files can't have create or delete permissions
+		 */
+		if ($this->info->getType() === \OCP\Files\FileInfo::TYPE_FILE) {
+			$permissions &= ~(\OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_DELETE);
+		}
+
+		return $permissions;
+	}
+
+	/**
 	 * @return string
 	 */
 	public function getDavPermissions() {