Wrong permissions or missing WRITE permission

[susnux]

• Originally reported by @juliusknorr in DAV permissions for read only single file shares indicate updatable nextcloud/server#53041

When parsing the permissions we only provide the Nextcloud storage permissions:

• readable
• updatable
• deletable
• createable
• shareable

But DAV also has writeable as a separate permission for files because updatable as in the NV DAV permission just means the node can be moved or renamed (metadata update) but it does not mean the content is updatable.
So we should maybe add a dedicated writable to the permissions or add a new flag for it on the node.

Ref for permission string: https://github.com/nextcloud/server/blob/dae7c159f728a90ffa53247d6e033abdae5d2bd6/lib/public/Files/DavUtil.php#L36

Here we have:

• NV -> The file or folder can be renamed (moved)
• G -> The file or folder can be read
• R -> The file or folder can be shared
• D -> The file or folder can be deleted
• W -> File only the file can be updated (write)
• CK -> Folder only new children can be created

[susnux]

IMHO we should change our parsing for the update permission to:

• if is folder and contains CK
• if is file and contains W

The NV permission part is only for if it can be renamed which we could provide as e.g. canBeMoved or similar.
Or we add a new permission MOVEABLE = 32 to the permissions enum for it?

[juliusknorr]

As a workaround I used node.attributes['share-permissions'] for now which returns the backend bit flag value