🧠 Surface orientation field through Concentrate

lib/concentrate/parser/gtfs_realtime_enhanced.ex

@@ -216,7 +216,8 @@ defmodule Concentrate.Parser.GTFSRealtimeEnhanced do
               occupancy_percentage: Map.get(vp, "occupancy_percentage"),
               multi_carriage_details:
                 VehiclePosition.CarriageDetails.build_multi_carriage_details(
-                  Helpers.parse_multi_carriage_details(vp)
+                  Helpers.parse_multi_carriage_details(vp),
+                  :enhanced
                 )
             )
           ]

lib/concentrate/vehicle_position/carriage_details.ex

@@ -15,37 +15,65 @@ defmodule Concentrate.VehiclePosition.CarriageDetails do
     :occupancy_percentage,
     :carriage_sequence,
     :label,
-    :id
+    :id,
+    :orientation
   ])
 
-  def build_multi_carriage_details(nil) do
+  def build_multi_carriage_details(multi_carriage_details, feed_type \\ :normal)
+
+  def build_multi_carriage_details(nil, _) do
     nil
   end
 
   # Ensures that the nil / empty values are appropriate as per PB spec:
-  def build_multi_carriage_details(multi_carriage_details) do
+  def build_multi_carriage_details(multi_carriage_details, feed_type) do
     Enum.map(multi_carriage_details, fn carriage_details ->
       carriage_details
-      |> get_atomized_carriage_details()
+      |> get_atomized_carriage_details(feed_type)
       |> drop_nil_values()
     end)
   end
 
   # Convert to atomized keys, so that both atoms and string keys are supported:
-  defp get_atomized_carriage_details(carriage_details) do
+  defp get_atomized_carriage_details(carriage_details, :enhanced) do
     atomized_carriage_details =
-      for {key, val} <- carriage_details,
-          into: %{},
-          do:
-            {if(is_atom(key), do: key, else: String.to_existing_atom(key)),
-             if(key in ["occupancy_status", :occupancy_status] and not is_atom(val),
-               do: OccupancyStatus.parse_to_atom(val),
-               else: val
-             )}
+      for pair <- carriage_details, into: %{}, do: atomize_key_value_pair(pair)
+
+    Map.take(
+      atomized_carriage_details,
+      ~w(id label carriage_sequence occupancy_status occupancy_percentage orientation)a
+    )
+  end
+
+  defp get_atomized_carriage_details(carriage_details, _) do
+    atomized_carriage_details =
+      for pair <- carriage_details, into: %{}, do: atomize_key_value_pair(pair)
 
     Map.take(
       atomized_carriage_details,
       ~w(id label carriage_sequence occupancy_status occupancy_percentage)a
     )
   end
+
+  defp atomize_key_value_pair({key, value}) when key in ["occupancy_status", :occupancy_status] do
+    {atomize_key(key), OccupancyStatus.parse_to_atom(value)}
+  end
+
+  defp atomize_key_value_pair({key, value}) when key in ["orientation", :orientation] do
+    {atomize_key(key), parse_orientation(value)}
+  end
+
+  defp atomize_key_value_pair({key, value}) do
+    {atomize_key(key), value}
+  end
+
+  defp atomize_key(key) when not is_atom(key) do
+    String.to_existing_atom(key)
+  end
+
+  defp atomize_key(key), do: key
+
+  defp parse_orientation("AB"), do: :AB
+  defp parse_orientation("BA"), do: :BA
+  defp parse_orientation(val), do: val
 end

lib/concentrate/vehicle_position/occupancy_status.ex

@@ -22,6 +22,8 @@ defmodule Concentrate.VehiclePosition.OccupancyStatus do
     )
   end
 
+  def parse_to_atom(occupancy_status) when is_atom(occupancy_status), do: occupancy_status
+
   def parse_to_atom(occupancy_status) do
     atom_occ_status = String.to_existing_atom(occupancy_status)
     if valid_occupancy_status?(atom_occ_status), do: atom_occ_status, else: :NO_DATA_AVAILABLE

test/concentrate/parser/gtfs_realtime_enhanced_test.exs

@@ -405,14 +405,16 @@ defmodule Concentrate.Parser.GTFSRealtimeEnhancedTest do
             label: "main-car",
             occupancy_status: :MANY_SEATS_FULL,
             occupancy_percentage: 80,
-            carriage_sequence: 1
+            carriage_sequence: 1,
+            orientation: :AB
           },
           %{
             id: 1,
             label: "second-car",
             occupancy_status: :EMPTY,
             occupancy_percentage: 0,
-            carriage_sequence: 2
+            carriage_sequence: 2,
+            orientation: :BA
           }
         ],
         "position" => %{
@@ -472,14 +474,16 @@ defmodule Concentrate.Parser.GTFSRealtimeEnhancedTest do
                      label: "main-car",
                      occupancy_status: :MANY_SEATS_FULL,
                      occupancy_percentage: 80,
-                     carriage_sequence: 1
+                     carriage_sequence: 1,
+                     orientation: :AB
                    },
                    %{
                      id: 1,
                      label: "second-car",
                      occupancy_status: :EMPTY,
                      occupancy_percentage: 0,
-                     carriage_sequence: 2
+                     carriage_sequence: 2,
+                     orientation: :BA
                    }
                  ]
                )

test/concentrate/vehicle_position_test.exs

@@ -74,14 +74,16 @@ defmodule Concentrate.VehiclePositionTest do
               label: "main-car",
               occupancy_status: :MANY_SEATS_FULL,
               occupancy_percentage: 80,
-              carriage_sequence: 1
+              carriage_sequence: 1,
+              orientation: :AB
             },
             %{
               id: 0,
               label: "second-car",
               occupancy_status: :EMPTY,
               occupancy_percentage: 0,
-              carriage_sequence: 2
+              carriage_sequence: 2,
+              orientation: :BA
             }
           ]
         )
@@ -99,14 +101,16 @@ defmodule Concentrate.VehiclePositionTest do
               label: "main-car",
               occupancy_status: :MANY_SEATS_FULL,
               occupancy_percentage: 80,
-              carriage_sequence: 1
+              carriage_sequence: 1,
+              orientation: :AB
             },
             %{
               id: 0,
               label: "second-car",
               occupancy_status: :EMPTY,
               occupancy_percentage: 0,
-              carriage_sequence: 2
+              carriage_sequence: 2,
+              orientation: :BA
             }
           ]
         )