feat: dynamically manage floors/rooms/tags

lib/localiser/localisation/room/server.ex

@@ -27,6 +27,8 @@ defmodule Localiser.Localisation.Room.Server do
 
   @impl true
   def init(room) do
+    Phoenix.PubSub.subscribe(@pubsub, "rooms")
+
     state = %__MODULE__{
       id: room.id,
       name: room.name,
@@ -65,6 +67,19 @@ defmodule Localiser.Localisation.Room.Server do
     {:reply, state.occupants, state}
   end
 
+  @impl true
+  def handle_info({:room_updated, %{id: id} = room}, %{id: id} = state) do
+    {:noreply, %{state |
+      name: room.name,
+      offset_x: room.offset_x || 0.0,
+      offset_y: room.offset_y || 0.0,
+      width: room.width || 0.0,
+      height: room.height || 0.0
+    }}
+  end
+
+  def handle_info(_msg, state), do: {:noreply, state}
+
   defp broadcast(room_id, occupants) do
     Phoenix.PubSub.broadcast(
       @pubsub,