This reduces the complexity of our dependency graph.
It also makes sub_store.get parallel to message_store.get.
For both you pass in the relevant id to get the
full validated object.
This change should make live-update code less brittle,
or at least less cumbersome.
Instead of having to re-compute calculated fields for
every change to a stream message, we now just compute
the fields right before we render stream settings UI.
This is mostly a pure code move.
In passing I remove an unneeded call to
update_calculated_fields in the dispatch code,
plus some tests that don't need them.
For most functions that we were using __Rewire__ for,
it's better to just use the override helper, which
use __Rewire__ under the hood, but also resets
the reference at the end of run_tests.
Another nice thing about override() is that it reports
when you never actually needed the mock, and this
commit fixes the instances found here.
I didn't replace every call to __Rewire__. The
remaining ones fall under these categories:
* I looked for ") =>" in my code sweep,
so I missed stuff like "noop" helpers.
* Sometimes we directly update something
in a module that's not a function. This
is generally evil, and we should use setters.
* Some tests have setup() helpers or similar
that complicated this code sweep, so I
simply punted.
* Somes modules rely on intra-test leaks. We
should fix those, but I just punted for the
main code sweep.
This prevents a bug where we interpret "2something"
as a modern slug instead of a legacy stream name.
The bug was probably somewhat unlikely to happen in
practice, since it only manifests if 2 is an actual
stream_id.
We still need to write to these globals with set_global because the
code being tested reads from them, but the tests themselves should
never need to read from them.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
This removes a bit of complexity. If a piece of
settings code needs to render a stream with
subscribers, it just asks for it.
We no longer have the brittle, action-at-a-distance
mechanism of mutating the subscriber count on to
the stream_data version of a sub.
Stream subs are pretty small, so making copies of
them is cheap, and the blueslip timings from the
previous commit can help confirm that.
There is some discussion of putting `subscriber_count`
on the Stream model, which may eventually get us
away from tracking it in `peer_data.js`, but we will
cross that bridge when we get there. See
https://github.com/zulip/zulip/issues/17101 for
more details.
After this change all peer_data functions consistently
use stream_id rather than some "sub" object whose
data type is complicated by all sort of fields that
don't really concern how we track subscribers.
The goal here is to make all our peer_data functions
basically work in id space. Passing a full `sub`
to these functions is a legacy of when subscriber
info was attached to a full stream "sub" object,
but we don't care about anything sub-related
(color, description, name, etc.) when we are
dealing with subscriptions.
When callers pass in stream_id, you can be more
confident in a quick skim of the code that we're
not mutating anything in the "sub".
This de-clutters stream_data a bit. Since our
peer data is our biggest performance concern,
I want to contain any optimizations to a fairly
well-focused module.
The name `peer_data` is a bit of a compromise,
since we already have `subs.js` and we use
`sub` as a variable name for stream records
throughout our code, but it's consistent with
our event nomenclature (peer/add, peer/remove)
and it's short while still being fairly easy
to find with grep.
This sets us up to use better system-wide data structures
for tracking subscribers.
Basically, instead of storing subscriber data on the
"sub" objects in stream_data.js, we instead have a
parallel data structure called stream_subscribers.
We also have stream_create, stream_edit, and friends
use helper functions rather than accessing
sub.subscribers directly.
Tim Abbott
Aman Agrawal
rht
Sahil Batra
m-e-l-u-h-a-n
Steve Howell
Riken Shah
Vishnu KS
Anders Kaseorg
Mateusz Mandera
sahil839
Priyank Patel
Ryan Rehman