fix: sensor schema drift

lib/localiser/domain/sensors.ex

@@ -6,7 +6,10 @@ defmodule Localiser.Domain.Sensors do
   alias Localiser.Domain.Schema.SensorCalibration
 
   def list_sensors do
-    Repo.all(Sensor)
+    Sensor
+    |> Repo.all()
+    |> Repo.preload(:room)
+    |> Enum.map(&populate_floor_coords/1)
   end
 
   def list_unplaced do
@@ -28,7 +31,12 @@ defmodule Localiser.Domain.Sensors do
     |> Repo.all()
   end
 
-  def get_sensor!(id), do: Repo.get!(Sensor, id)
+  def get_sensor!(id) do
+    Sensor
+    |> Repo.get!(id)
+    |> Repo.preload(:room)
+    |> populate_floor_coords()
+  end
 
   def get_sensor_by_sensor_id(sensor_id) do
     Repo.get_by(Sensor, sensor_id: sensor_id)
@@ -108,6 +116,7 @@ defmodule Localiser.Domain.Sensors do
   def place_sensor(%Sensor{} = sensor, room_id, {x, y}) do
     with {:ok, sensor} <- update_sensor(sensor, %{room_id: room_id, x: x, y: y}) do
       room = Repo.preload(sensor, :room).room
+      sensor = populate_floor_coords(%{sensor | room: room})
       Phoenix.PubSub.broadcast(Localiser.PubSub, "sensors", {:sensor_enrolled, sensor, room})
       {:ok, sensor}
     end
@@ -121,4 +130,13 @@ defmodule Localiser.Domain.Sensors do
       {:ok, sensor}
     end
   end
+
+  defp populate_floor_coords(%Sensor{room: nil} = sensor), do: sensor
+
+  defp populate_floor_coords(%Sensor{room: room} = sensor) do
+    %{sensor |
+      floor_x: (room.x || 0.0) + (sensor.x || 0.0),
+      floor_y: (room.y || 0.0) + (sensor.y || 0.0)
+    }
+  end
 end