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lib/livebook_web/live/hooks/sidebar_hook.ex
defmodule LivebookWeb.SidebarHook do
require Logger
import Phoenix.Component
import Phoenix.LiveView
def on_mount(:default, _params, _session, socket) do
if connected?(socket) do
Livebook.Hubs.subscribe([:crud, :connection])
Phoenix.PubSub.subscribe(Livebook.PubSub, "sidebar")
end
socket =
socket
|> assign(saved_hubs: Livebook.Hubs.get_metadatas())
|> attach_hook(:hubs, :handle_info, &handle_info/2)
|> attach_hook(:shutdown, :handle_info, &handle_info/2)
|> attach_hook(:shutdown, :handle_event, &handle_event/3)
{:cont, socket}
end
defp handle_info(:shutdown, socket) do
{:halt, put_flash(socket, :info, "Livebook is shutting down. You can close this page.")}
end
@connection_events ~w(hub_connected hub_disconnected hubs_metadata_changed)a
defp handle_info(event, socket) when event in @connection_events do
{:halt, assign(socket, saved_hubs: Livebook.Hubs.get_metadatas())}
end
@error_events ~w(connection_error disconnection_error)a
defp handle_info({event, _reason}, socket) when event in @error_events do
{:halt, assign(socket, saved_hubs: Livebook.Hubs.get_metadatas())}
end
defp handle_info(_event, socket), do: {:cont, socket}
defp handle_event("shutdown", _params, socket) do
Livebook.Config.shutdown()
{:halt, socket}
end
defp handle_event(_event, _params, socket), do: {:cont, socket}
end