live_beats/lib/live_beats_web/live/nav.ex
2022-02-01 09:33:04 -05:00

62 lines
1.7 KiB
Elixir

defmodule LiveBeatsWeb.Nav do
import Phoenix.LiveView
alias LiveBeats.{Accounts, MediaLibrary}
alias LiveBeatsWeb.{ProfileLive, SettingsLive}
def on_mount(:default, _params, _session, socket) do
{:cont,
socket
|> assign(active_users: MediaLibrary.list_active_profiles(limit: 20))
|> assign(:region, System.get_env("FLY_REGION") || "iad")
|> attach_hook(:active_tab, :handle_params, &handle_active_tab_params/3)
|> attach_hook(:ping, :handle_event, &handle_event/3)}
end
defp handle_active_tab_params(params, _url, socket) do
active_tab =
case {socket.view, socket.assigns.live_action} do
{ProfileLive, _} ->
if params["profile_username"] == current_user_profile_username(socket) do
:profile
end
{SettingsLive, _} ->
:settings
{_, _} ->
nil
end
{:cont, assign(socket, active_tab: active_tab)}
end
defp handle_event("ping", %{"rtt" => rtt}, socket) do
{:halt,
socket
|> rate_limited_ping_broadcast(socket.assigns.current_user, rtt)
|> push_event("pong", %{})}
end
defp handle_event(_, _, socket), do: {:cont, socket}
defp rate_limited_ping_broadcast(socket, %Accounts.User{} = user, rtt) when is_integer(rtt) do
now = System.system_time(:millisecond)
last_ping_at = socket.assigns[:last_ping_at]
if is_nil(last_ping_at) || now - last_ping_at > 1000 do
MediaLibrary.broadcast_ping(user, rtt, socket.assigns.region)
assign(socket, :last_ping_at, now)
else
socket
end
end
defp rate_limited_ping_broadcast(socket, _user, _rtt), do: socket
defp current_user_profile_username(socket) do
if user = socket.assigns.current_user do
user.username
end
end
end