Uploading a file or creating a folder failed on the live 0.15.5 server with
`invalidProperties (nodeType)`. The property arrived in Stalwart 0.16; before
that a FileNode has no nodeType at all, and the create is refused outright.
Older servers tell a file from a directory a different way: the node carries
file properties or it does not. Setting blobId, size or type — even to null —
makes it a file, so a directory there is exactly parentId plus name.
0.16 is also the first release to advertise urn:stalwart:jmap and no earlier
one knows that capability, so its presence stands in for "has the newer
FileNode shape". Creates, and the property lists we ask for, are shaped from
that.
The read side needed it too: a server that never reports nodeType would have
had every folder drawn with a file icon, sorted among the files and opening as
a download. Nodes are normalised as they arrive, so everything downstream can
still just read nodeType.
jcoffey-dev
49ea07eeaa