Don't show schedules or predictions outside rating

As of 65e97eb, the line page accepts a date query param, which enables
Backstop testing on that page to work properly again. However, it also
introduced a regression, where if the date given has no service
available in the API, rather than just returning live predictions,
TransitNearMe.time_data_for_route_by_stop/3 was choking on the error
struct indicating "no service". Fixed.

apps/site/lib/site/transit_near_me.ex

@@ -408,16 +408,25 @@ defmodule Site.TransitNearMe do
     date = Keyword.get(opts, :date, Util.service_date())
     schedules_fn = Keyword.get(opts, :schedules_fn, &Schedules.Repo.by_route_ids/2)
 
-    route_id
-    |> expand_route_id()
-    |> schedules_fn.(direction_id: direction_id, date: date)
-    |> get_predicted_schedules([route: route_id, direction_id: direction_id], opts)
-    |> Enum.group_by(&PredictedSchedule.route(&1).id)
-    |> Enum.flat_map(&schedules_for_route(&1, %{}, [], opts).stops_with_directions)
-    |> convert_route_time_data_to_map()
-    |> Map.new(fn {stop_id, time_data} ->
-      {stop_id, limit_route_time_data(time_data)}
-    end)
+    schedule_data =
+      route_id
+      |> expand_route_id()
+      |> schedules_fn.(direction_id: direction_id, date: date)
+
+    case schedule_data do
+      {:error, [%JsonApi.Error{code: "no_service"}]} ->
+        %{}
+
+      _ ->
+        schedule_data
+        |> get_predicted_schedules([route: route_id, direction_id: direction_id], opts)
+        |> Enum.group_by(&PredictedSchedule.route(&1).id)
+        |> Enum.flat_map(&schedules_for_route(&1, %{}, [], opts).stops_with_directions)
+        |> convert_route_time_data_to_map()
+        |> Map.new(fn {stop_id, time_data} ->
+          {stop_id, limit_route_time_data(time_data)}
+        end)
+    end
   end
 
   @spec convert_route_time_data_to_map([stop_with_data]) :: %{Stop.id_t() => [headsign_data]}

apps/site/test/site/transit_near_me_test.exs

@@ -461,5 +461,34 @@ defmodule Site.TransitNearMeTest do
 
       assert %{"place-wimnl" => [%{}]} = actual
     end
+
+    test "return neither schedules nor predictions if date is outside rating" do
+      predictions_fn = fn _ -> [@prediction] end
+
+      schedules_fn = fn _, _ ->
+        {:error,
+         [
+           %JsonApi.Error{
+             code: "no_service",
+             detail: nil,
+             meta: %{
+               "end_date" => "2020-03-14",
+               "start_date" => "2019-12-06",
+               "version" => "Winter 2020, 2019-12-13T17:29:50+00:00, version D"
+             },
+             source: %{"parameter" => "date"}
+           }
+         ]}
+      end
+
+      actual =
+        TransitNearMe.time_data_for_route_by_stop(@route.id, 1,
+          schedules_fn: schedules_fn,
+          predictions_fn: predictions_fn,
+          now: @now
+        )
+
+      assert actual == %{}
+    end
   end
 end