improve performance of calculating dav permissions

Signed-off-by: Robin Appelman <robin@icewind.nl>

lib/private/Files/FileInfo.php

@@ -32,7 +32,9 @@
  */
 namespace OC\Files;
 
+use OCA\Files_Sharing\ISharedStorage;
 use OCP\Files\Cache\ICacheEntry;
+use OCP\Files\IHomeStorage;
 use OCP\Files\Mount\IMountPoint;
 use OCP\IUser;
 
@@ -313,27 +315,13 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 * @return bool
 	 */
 	public function isShared() {
-		$sid = $this->getStorage()->getId();
-		if (!is_null($sid)) {
-			$sid = explode(':', $sid);
-			return ($sid[0] === 'shared');
-		}
-
-		return false;
+		$storage = $this->getStorage();
+		return $storage->instanceOfStorage(ISharedStorage::class);
 	}
 
 	public function isMounted() {
 		$storage = $this->getStorage();
-		if ($storage->instanceOfStorage('\OCP\Files\IHomeStorage')) {
-			return false;
-		}
-		$sid = $storage->getId();
-		if (!is_null($sid)) {
-			$sid = explode(':', $sid);
-			return ($sid[0] !== 'home' and $sid[0] !== 'shared');
-		}
-
-		return false;
+		return !($storage->instanceOfStorage(IHomeStorage::class) || $storage->instanceOfStorage(ISharedStorage::class));
 	}
 
 	/**

lib/public/Files/DavUtil.php

@@ -59,23 +59,24 @@ class DavUtil {
 	 * @since 25.0.0
 	 */
 	public static function getDavPermissions(FileInfo $info): string {
+		$permissions = $info->getPermissions();
 		$p = '';
 		if ($info->isShared()) {
 			$p .= 'S';
 		}
-		if ($info->isShareable()) {
+		if ($permissions & Constants::PERMISSION_SHARE) {
 			$p .= 'R';
 		}
 		if ($info->isMounted()) {
 			$p .= 'M';
 		}
-		if ($info->isReadable()) {
+		if ($permissions & Constants::PERMISSION_READ) {
 			$p .= 'G';
 		}
-		if ($info->isDeletable()) {
+		if ($permissions & Constants::PERMISSION_DELETE) {
 			$p .= 'D';
 		}
-		if ($info->isUpdateable()) {
+		if ($permissions & Constants::PERMISSION_UPDATE) {
 			$p .= 'NV'; // Renameable, Movable
 		}
 
@@ -86,7 +87,7 @@ class DavUtil {
 			$rootEntry = $storage->getCache()->get('');
 			$isWritable = $rootEntry->getPermissions() & Constants::PERMISSION_UPDATE;
 		} else {
-			$isWritable = $info->isUpdateable();
+			$isWritable = $permissions & Constants::PERMISSION_UPDATE;
 		}
 
 		if ($info->getType() === FileInfo::TYPE_FILE) {
@@ -94,7 +95,7 @@ class DavUtil {
 				$p .= 'W';
 			}
 		} else {
-			if ($info->isCreatable()) {
+			if ($permissions & Constants::PERMISSION_CREATE) {
 				$p .= 'CK';
 			}
 		}