berrypod/lib/berrypod_web/live/shop/pages/cart.ex

defmodule BerrypodWeb.Shop.Pages.Cart do
  @moduledoc """
  Cart page handler for the unified Shop.Page LiveView.
  """

  import Phoenix.Component, only: [assign: 3]

  alias Berrypod.Pages

  def init(socket, _params, _uri) do
    page = Pages.get_page("cart")

    socket =
      socket
      |> assign(:page_title, "Cart")
      |> assign(:page, page)
      |> maybe_assign_meta_robots(page)

    {:noreply, socket}
  end

  defp maybe_assign_meta_robots(socket, page) do
    meta_robots = page && page[:meta_robots]

    if meta_robots && meta_robots != "index, follow" do
      assign(socket, :meta_robots, meta_robots)
    else
      socket
    end
  end

  def handle_params(_params, _uri, socket) do
    {:noreply, socket}
  end

  def handle_event(_event, _params, _socket), do: :cont

  # Called from render to compute the subtotal
  def compute_assigns(assigns) do
    Map.put(assigns, :cart_page_subtotal, Berrypod.Cart.calculate_subtotal(assigns.cart_items))
  end
end