defp apply_action(socket, :index, params) do
    sort_direction = String.to_existing_atom(params["sort"] || "desc")
    socket
    |> assign(:page_title, "Listing Posts")
    |> assign(:post, nil)
    |> assign(:current_tag, nil)
    |> assign(:sort_direction, sort_direction)
    |> stream(:posts, fetch_posts(nil, sort_direction), reset: true)
  end
  @impl true
  def handle_info({TyperWeb.PostLive.FormComponent, {:saved, post}}, socket) do
    {:noreply, stream_insert(socket, :posts, post)}
  end