It works!!

lib/beacon/live_admin/live/page_editor_live/edit.ex

@@ -5,6 +5,7 @@ defmodule Beacon.LiveAdmin.PageEditorLive.Edit do
   require IEx
   use Beacon.LiveAdmin.PageBuilder
   alias Beacon.LiveAdmin.Content
+  alias Beacon.LiveAdmin.WebAPI
 
   @impl true
   def menu_link("/pages", :edit), do: {:submenu, "Pages"}
@@ -58,12 +59,8 @@ defmodule Beacon.LiveAdmin.PageEditorLive.Edit do
   def handle_event("render_component_in_page", %{ "component_id" => component_id, "page_id" => page_id }, socket) do
     page = Content.get_page(socket.assigns.beacon_page.site, page_id)
     component = Content.get_component(socket.assigns.beacon_page.site, component_id)
-    # path = for segment <- String.split(page.path, "/"), segment != "", do: segment
-    # beacon_live_data = Beacon.DataSource.live_data(page.site, path, [])
-    # {:ok, ast} = Beacon.Template.HEEx.JSONEncoder.encode(component.site, component.body, assigns)
-    # data = Map.put(data(component), :ast, ast)
-    # %{data: data}
-    {:reply, %{ "ast" =>  "sample_data" }, socket}
+    %{data: %{ ast: ast } } = WebAPI.Component.show_ast(socket.assigns.beacon_page.site, component, page)
+    {:reply, %{ "ast" => ast }, socket}
   end
 
   def handle_event("update_page_ast", %{ "id" => id, "ast" => ast }, socket) do

lib/beacon/live_admin/web_api/component.ex

@@ -0,0 +1,14 @@
+defmodule Beacon.LiveAdmin.WebAPI.Component do
+  @moduledoc """
+  Calls Beacon Web API through the cluster.
+  """
+
+  import Beacon.LiveAdmin.Cluster, only: [call: 4]
+
+  def show_ast(site, component, page) do
+    path = for segment <- String.split(page.path, "/"), segment != "", do: segment
+    # beacon_live_data = Beacon.DataSource.live_data(site, path, [])
+    beacon_live_data = call(site, Beacon.DataSource, :live_data, [site, path, []])
+    call(site, BeaconWeb.API.ComponentJSON, :show_ast, [%{component: component,  assigns: %{beacon_live_data: beacon_live_data}}])
+  end
+end