Hi,
Are there any preferred ways of checking for feature flags for live views in a live_session
?
I would assume that one use attach_hook/4
and then add that hook to the relevant live_session
.
I know Plausible.io uses FunWithFlags
making it a nice reference, but they do this for controller actions and components, not entire live views.
I threw (!) together the code below to test the concept.
It gets more complicated if one has a tab for a path to several other live views of course, which I would believe is a fairly common use case.
defmodule MyAppWeb.CheckFlags do
use MyAppWeb, :verified_routes
import Phoenix.LiveView
import MyAppWeb.Gettext
def on_mount(:default, _params, _session, socket) do
{:cont,
socket
|> attach_hook(:flags, :handle_params, &check_flags/3)}
end
defp check_flags(_params, _session, socket) do
continue? =
case socket.view do
MyAppWeb.ExcitingExperimentalFeatureLive ->
FunWithFlags.enabled?(:exciting_experimental_feature, for: socket.assigns.current_user)
_ ->
true
end
if continue? do
{:cont, socket}
else
socket =
socket
|> Phoenix.LiveView.put_flash(
:error,
gettext("This feature has not been enabled for your account.")
)
|> Phoenix.LiveView.redirect(to: ~p"/")
{:halt, socket}
end
end
end