initial route for ICS retrieval, no actual ICS data yet

lib/shift73k_web/controllers/user_shifts_csv_controller.ex

@@ -5,7 +5,7 @@ defmodule Shift73kWeb.UserShiftsCsvController do
   alias Shift73k.Shifts.Shift
 
   def new(conn, _params) do
-    render(conn, "new.html", error_message: nil)
+    render(conn, "new.html")
   end
 
   def export(conn, %{"csv_export" => request_params}) do

lib/shift73k_web/controllers/user_shifts_ics_controller.ex

@@ -0,0 +1,16 @@
+defmodule Shift73kWeb.UserShiftsIcsController do
+  use Shift73kWeb, :controller
+
+  alias Shift73k.Accounts
+  alias Shift73k.Accounts.User
+
+  def index(conn, %{"slug" => slug}) do
+    case Accounts.get_user_by_calendar_slug(slug) do
+      %User{} = user ->
+        render(conn, "index.html", slug: slug, user: user)
+
+      _ ->
+        send_resp(conn, 404, "Not found")
+    end
+  end
+end