index.community/backend/lib/backend_web/controllers/graph_controller.ex

defmodule BackendWeb.GraphController do
  use BackendWeb, :controller

  alias Backend.Api

  action_fallback BackendWeb.FallbackController

  def index(conn, _params) do
    nodes = Api.list_nodes()
    edges = Api.list_edges()
    render(conn, "index.json", nodes: nodes, edges: edges)
  end

  def show(conn, %{"id" => domain}) do
    nodes = Api.list_nodes(domain)
    edges = Api.list_edges(domain)
    render(conn, "index.json", nodes: nodes, edges: edges)
  end
end