meta/lib/recycledcloud_web/controllers/billing_controller.ex

defmodule RecycledCloudWeb.BillingController do
  use RecycledCloudWeb, :controller

  alias RecycledCloud.Billing.{Partner, Invoice}
  alias RecycledCloud.Repo

  def current_partner(conn) do
    user = conn.assigns.current_user
    Partner.get_or_create(user)
  end

  def index(conn, _params) do
    partner = conn |> current_partner
    changeset = partner |> Partner.changeset(%{})
    invoices = partner |> Invoice.get_all_for

    render(
      conn,
      "index.html",
      partner: partner,
      partner_changeset: changeset,
      invoices: invoices
    )
  end

  def update(conn, %{"partner" => changes} = params) do
    partner = conn |> current_partner
    changeset = partner |> Partner.changeset(changes)

    case Partner.apply(changeset) do
      {:ok, _} ->
        conn
        |> put_flash(:info, "Billing Partner has been updated")
        |> redirect(to: Routes.billing_path(conn, :index))
      {:error, changeset} ->

        invoices = partner |> Invoice.get_all_for
        render(
          conn,
          "index.html",
          partner: partner,
          partner_changeset: changeset,
          invoices: invoices
        )
    end
  end
end