Schedule Finder: remove duplicate services (#105)

apps/site/lib/site_web/controllers/schedule/line_controller.ex

@@ -2,6 +2,7 @@ defmodule SiteWeb.ScheduleController.LineController do
   use SiteWeb, :controller
   alias Phoenix.HTML
   alias Routes.{Group, Route}
+  alias Services.Repo, as: ServicesRepo
   alias Services.Service
   alias Site.ScheduleNote
   alias SiteWeb.{ScheduleView, ViewHelpers}
@@ -42,7 +43,11 @@ defmodule SiteWeb.ScheduleController.LineController do
 
   def assign_schedule_page_data(conn) do
     service_date = Util.service_date()
-    services = Services.Repo.by_route_id(conn.assigns.route.id)
+
+    services =
+      conn.assigns.route.id
+      |> ServicesRepo.by_route_id()
+      |> dedup_services()
 
     assign(
       conn,
@@ -82,6 +87,17 @@ defmodule SiteWeb.ScheduleController.LineController do
     )
   end
 
+  @spec dedup_services([Service.t()]) :: [Service.t()]
+  def dedup_services(services) do
+    services
+    |> Enum.group_by(fn %{start_date: start_date, end_date: end_date, valid_days: valid_days} ->
+      {start_date, end_date, valid_days}
+    end)
+    |> Enum.map(fn {_key, [service | _rest]} ->
+      service
+    end)
+  end
+
   def sort_services_by_date(%Service{typicality: :typical_service, type: :weekday} = service) do
     {1, Date.to_string(service.start_date)}
   end

apps/site/test/site_web/controllers/schedule/line_test.exs

@@ -453,4 +453,17 @@ defmodule SiteWeb.ScheduleController.LineTest do
       assert connection_ids == subway_cr_ids
     end
   end
+
+  describe "services" do
+    test "remove duplicates", %{conn: conn} do
+      conn =
+        conn
+        |> put_resp_cookie("schedule_redesign", "true")
+        |> get(line_path(conn, :show, "39"))
+
+      services = Services.Repo.by_route_id("39")
+
+      assert length(conn.assigns.schedule_page_data.services) < services
+    end
+  end
 end