aprs.me/lib/aprsme_web/live/locale_hook.ex
Graham McIntire b8a9b8a465
chore(dialyzer): enable stricter flags and fix 97 resulting findings
Turned on :error_handling, :underspecs, and :unmatched_returns in
mix.exs dialyzer config. The 97 warnings this surfaced were fixed in
place rather than suppressed:

- unmatched_return (79): explicit discard with `_ = ...` for
  fire-and-forget side effects (Process.cancel_timer, :ets.new,
  send/2), and pattern-matched `:ok = ...` for control-plane
  Phoenix.PubSub subscribe/unsubscribe/broadcast calls so a future
  return-shape change fails loud.

- contract_supertype (18): tightened @spec arg and return types on
  data_builder, historical_loader, url_params, packet_utils,
  encoding_utils, aprs_symbol, weather_controller, packet_replay to
  match each function's actual success typing.

No behavioural change. mix compile clean, 1008 tests pass, dialyzer
count is now 0.
2026-04-21 10:07:01 -05:00

46 lines
1.2 KiB
Elixir

defmodule AprsmeWeb.LocaleHook do
@moduledoc """
LiveView hook for setting locale based on Accept-Language header.
This ensures that LiveView updates maintain the correct locale.
"""
import Phoenix.Component
# Cache supported locales at compile time
@supported_locales ~w(en es de fr)
def on_mount(:set_locale, params, session, socket) do
# Only set locale in production to allow seeing "xx" placeholders in dev
locale =
if Application.get_env(:aprsme, :env) == :prod do
get_locale_from_session(session) || "en"
end
_ =
if locale do
Gettext.put_locale(AprsmeWeb.Gettext, locale)
end
# Set map_page assign based on the view module
map_page = map_page?(socket, params)
{:cont, assign(socket, locale: locale, map_page: map_page)}
end
defp get_locale_from_session(session) do
case session do
%{"locale" => locale} when locale in @supported_locales ->
locale
_ ->
nil
end
end
defp map_page?(socket, _params) do
# Only check the view module from socket private data
case socket.private[:phoenix_live_view] do
%{view: AprsmeWeb.MapLive.Index} -> true
_ -> false
end
end
end