It's kind of silly to cache ListWidgets for subscriber
lists when we only ever update the most recent one.
This will save memory if you are managing a whole bunch
of streams, although I suspect the savings here is
mostly negligible unless you were doing something
crazy.
The main motivation here is just that it simplifies the
code.
Now our click handlers get stream_id directly from
e.target, and then downstream code is no longer
coupled to the event semantics.
Note that we'll probably just know the stream_id
more directly after future commits.
We also remove a little bit of redundant error
handling.
This is a fairly straightforward extraction.
It's good to test this with Iago, and then go into
Manage Streams and add/remove subscribers for a stream
like devel.
I copy/pasted two small functions that will soon
diverge from stream_edit. The get_stream_id function
will either use a module variable (since we're
generally only editing subscribers for one stream, and
we already have the singleton assumption with
`input_pill`) or a more strict CSS selector. And then
get_sub_for_target depends on get_stream_id. We may not
always need full subs, anyway, and when we adapt some
of this code for creating streams, things are likely to
change.
I stopped exporting a couple functions that have no
callers outside of this module.
The main entry point for the module is
enable_subscriber_management.
We continue to export invite_user_to_stream and
remove_user_from_stream, which should possibly be just
pulled into their own module to lessen some
dependencies, but they don't have too much baggage,
since they just wrap channel calls.
Steve Howell