In very large communities, computing page_params can be quite
expensive. Because we've moved the homepage for communities with web
public streams enabled to be the Zulip app, and it's common for
automation to frequently poll the homepage of a Zulip organization,
we'd like to keep those homepages cheap (as the login pages are).
We address this by prototyping something we may end up wanting to do
anyway -- having the web application do a `POST /register` API call in
order to fetch most page_params, and merging those with the mostly
webapp configuration page_params that we leave in the / response for
convenience.
This exact implementation is messy in a few ways:
* We rely on the assumption that ui_init.initialize_everything happens
before all code that needs to inspect the page_params properties we
are fetching via /register. This is likely mostly true, but nothing
in the implementation enforces it.
* The bundle of ~25 keys that are in page_params ideally would be
considered individually, with some moved to the /register API
response and perhaps others eliminated or namespaced inside a
webapp_settings object.
* It's weird to have the spectators network sequence different that
from logged-in users, and potentially a maintainability risk.
* We might be able to arrange that the initial `/` response be
cacheable, now that we're no longer embedding our metadata inside
it. We've made no effort to do that as of yet.
Despite those issues, this commit solves an immediate problem and will
give us helpful experience with a model closer to the one we'll want
in order to happily support a web client that can be run locally
against a production Zulip server's data.
Co-authored-by: Anders Kaseorg <anders@zulip.com>
We turn off the eslint no-use-before-define for TypeScript files
because it does not work correctly for types. There is already
a typescript-eslint version of it that is enabled for TS.
We also update the error handler on window to use instanceof check
for ErrorEvent instead of checking the error property.
This guards against various mistakes, such as setting defaultMessage
to a computed expression that can’t be extracted.
https://formatjs.io/docs/tooling/linter/
Signed-off-by: Anders Kaseorg <anders@zulip.com>
The Event.which and Event.keyCode are deprecated as pointed out by
TypeScript intellisense based on the jQuery types. We use Event.key
instead which behaves similarly to Event.which & Event.keyCode for
our use case.
The only difference in functionality by this change is that the vim
keys won't work when Caps Lock is on. This is because, in this case,
the key property will be "J" instead of 'j'. We can fix this by
adding a mapping for this, however, I think we don't want to handle
this case so I left this change out. Tested by trying out the
everywhere keydown_util is used.
Finally, we also turn off the new-cap rule for tests since I think
it fine to only enforce it on real code and exempting test code is
fine.
This sorts the members imported within each individual declaration; we
use import/order for sorting multiple declarations.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
@typescript-eslint/recommended disables no-undef on the theory that
TypeScript knows which globals are in scope. However, some TypeScript
definitions include declarations for globals that may or may not
actually be available depending on the environment. So we will need
to prohibit some globals that TypeScript knows about, and enforce that
they are properly imported.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Anders Kaseorg
Tim Abbott
Priyank Patel