func (st resourceState) setResource(pendingID, applicationID, userID string, chRes charmresource.Resource, r io.Reader) (resource.Resource, error) {
id := newResourceID(applicationID, chRes.Name)
res := resource.Resource{
Resource: chRes,
ID: id,
PendingID: pendingID,
ApplicationID: applicationID,
}
if r != nil {
// TODO(ericsnow) Validate the user ID (or use a tag).
res.Username = userID
res.Timestamp = st.currentTimestamp()
}
if err := res.Validate(); err != nil {
return res, errors.Annotate(err, "bad resource metadata")
}
if r == nil {
if err := st.persist.SetResource(res); err != nil {
return res, errors.Trace(err)
}
} else {
if err := st.storeResource(res, r); err != nil {
return res, errors.Trace(err)
}
}
return res, nil
}