feat: dynamically manage floors/rooms/tags

lib/localiser/application.ex

@@ -9,6 +9,8 @@ defmodule Localiser.Application do
       {Phoenix.PubSub, name: Localiser.PubSub},
       Localiser.MQTT.Supervisor,
       Localiser.RSSI.Buffer,
+      Localiser.Localisation.Floor.Manager,
+      Localiser.Localisation.Tag.Manager,
       Localiser.Localisation.Filter.Supervisor,
       Localiser.Localisation.Floor.Supervisor
     ]

lib/localiser/domain/floors.ex

@@ -11,19 +11,36 @@ defmodule Localiser.Domain.Floors do
   def get_floor!(id), do: Repo.get!(Floor, id)
 
   def create_floor(attrs) do
-    %Floor{}
-    |> Floor.changeset(attrs)
-    |> Repo.insert()
+    case %Floor{} |> Floor.changeset(attrs) |> Repo.insert() do
+      {:ok, floor} ->
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "floors", {:floor_created, floor})
+        {:ok, floor}
+
+      error ->
+        error
+    end
   end
 
   def update_floor(%Floor{} = floor, attrs) do
-    floor
-    |> Floor.changeset(attrs)
-    |> Repo.update()
+    case floor |> Floor.changeset(attrs) |> Repo.update() do
+      {:ok, floor} ->
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "floors", {:floor_updated, floor})
+        {:ok, floor}
+
+      error ->
+        error
+    end
   end
 
   def delete_floor(%Floor{} = floor) do
-    Repo.delete(floor)
+    case Repo.delete(floor) do
+      {:ok, deleted} ->
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "floors", {:floor_deleted, deleted.id})
+        {:ok, deleted}
+
+      error ->
+        error
+    end
   end
 
   def list_floors_with_rooms do

lib/localiser/domain/rooms.ex

@@ -3,6 +3,7 @@ defmodule Localiser.Domain.Rooms do
 
   alias Localiser.Repo
   alias Localiser.Domain.Schema.Room
+  alias Localiser.Domain.Schema.Sensor
 
   def list_rooms do
     Repo.all(Room)
@@ -17,18 +18,41 @@ defmodule Localiser.Domain.Rooms do
   def get_room!(id), do: Repo.get!(Room, id)
 
   def create_room(attrs) do
-    %Room{}
-    |> Room.changeset(attrs)
-    |> Repo.insert()
+    case %Room{} |> Room.changeset(attrs) |> Repo.insert() do
+      {:ok, room} ->
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "rooms", {:room_created, room})
+        {:ok, room}
+
+      error ->
+        error
+    end
   end
 
   def update_room(%Room{} = room, attrs) do
-    room
-    |> Room.changeset(attrs)
-    |> Repo.update()
+    case room |> Room.changeset(attrs) |> Repo.update() do
+      {:ok, room} ->
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "rooms", {:room_updated, room})
+        {:ok, room}
+
+      error ->
+        error
+    end
   end
 
   def delete_room(%Room{} = room) do
-    Repo.delete(room)
+    sensors = Repo.all(from s in Sensor, where: s.room_id == ^room.id)
+
+    case Repo.delete(room) do
+      {:ok, deleted} ->
+        Enum.each(sensors, fn s ->
+          Phoenix.PubSub.broadcast(Localiser.PubSub, "sensors", {:sensor_unenrolled, s.sensor_id})
+        end)
+
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "rooms", {:room_deleted, deleted.id, deleted.floor_id})
+        {:ok, deleted}
+
+      error ->
+        error
+    end
   end
 end

lib/localiser/domain/tags.ex

@@ -13,18 +13,28 @@ defmodule Localiser.Domain.Tags do
   end
 
   def create_tag(attrs) do
-    %Tag{}
-    |> Tag.changeset(attrs)
-    |> Repo.insert()
+    case %Tag{} |> Tag.changeset(attrs) |> Repo.insert() do
+      {:ok, tag} ->
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "tags", {:tag_enrolled, tag})
+        {:ok, tag}
+
+      error ->
+        error
+    end
   end
 
   def update_tag(%Tag{} = tag, attrs) do
-    tag
-    |> Tag.changeset(attrs)
-    |> Repo.update()
+    tag |> Tag.changeset(attrs) |> Repo.update()
   end
 
   def delete_tag(%Tag{} = tag) do
-    Repo.delete(tag)
+    case Repo.delete(tag) do
+      {:ok, deleted} ->
+        Phoenix.PubSub.broadcast(Localiser.PubSub, "tags", {:tag_removed, deleted.tag_id})
+        {:ok, deleted}
+
+      error ->
+        error
+    end
   end
 end

lib/localiser/localisation/floor/manager.ex

@@ -0,0 +1,43 @@
+defmodule Localiser.Localisation.Floor.Manager do
+  @moduledoc """
+  Global GenServer that reacts to floor lifecycle events and drives Floor.Supervisor.
+
+  - {:floor_created, floor}  → start a Floor.Server for the new floor
+  - {:floor_deleted, floor_id} → terminate the Floor.Server subtree
+  """
+
+  use GenServer
+
+  alias Localiser.Localisation.Floor
+
+  def start_link(_args) do
+    GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
+  end
+
+  @impl true
+  def init(:ok) do
+    Phoenix.PubSub.subscribe(Localiser.PubSub, "floors")
+    {:ok, :ok}
+  end
+
+  @impl true
+  def handle_info({:floor_created, floor}, state) do
+    case Registry.lookup(Localiser.Registry, {:floor_server, floor.id}) do
+      [] -> Floor.Supervisor.start_floor_server(floor)
+      _ -> :ok
+    end
+
+    {:noreply, state}
+  end
+
+  def handle_info({:floor_deleted, floor_id}, state) do
+    case Registry.lookup(Localiser.Registry, {:floor_server, floor_id}) do
+      [{pid, _}] -> DynamicSupervisor.terminate_child(Floor.Supervisor, pid)
+      [] -> :ok
+    end
+
+    {:noreply, state}
+  end
+
+  def handle_info(_msg, state), do: {:noreply, state}
+end

lib/localiser/localisation/floor/server.ex

@@ -3,6 +3,7 @@ defmodule Localiser.Localisation.Floor.Server do
 
   alias Localiser.Localisation.Room
   alias Localiser.Localisation.Sensor
+
   def start_link(floor) do
     Supervisor.start_link(__MODULE__, floor, name: via(floor.id))
   end
@@ -15,6 +16,7 @@ defmodule Localiser.Localisation.Floor.Server do
   def init(floor) do
     children = [
       {Room.Supervisor, floor},
+      {Room.Manager, floor},
       {Sensor.Supervisor, floor},
       {Sensor.Manager, floor}
     ]

lib/localiser/localisation/room/manager.ex

@@ -0,0 +1,47 @@
+defmodule Localiser.Localisation.Room.Manager do
+  @moduledoc """
+  Per-floor GenServer that reacts to room lifecycle events and drives Room.Supervisor.
+
+  - {:room_created, room}          → start a Room.Server (if room belongs to this floor)
+  - {:room_deleted, room_id, floor_id} → terminate the Room.Server (if on this floor)
+  """
+
+  use GenServer
+
+  alias Localiser.Localisation.Room
+
+  def start_link(floor) do
+    GenServer.start_link(__MODULE__, floor.id, name: via(floor.id))
+  end
+
+  def via(floor_id) do
+    {:via, Registry, {Localiser.Registry, {:room_manager, floor_id}}}
+  end
+
+  @impl true
+  def init(floor_id) do
+    Phoenix.PubSub.subscribe(Localiser.PubSub, "rooms")
+    {:ok, %{floor_id: floor_id}}
+  end
+
+  @impl true
+  def handle_info({:room_created, %{floor_id: floor_id} = room}, %{floor_id: floor_id} = state) do
+    case Registry.lookup(Localiser.Registry, {:room, room.id}) do
+      [] -> Room.Supervisor.start_room_server(floor_id, room)
+      _ -> :ok
+    end
+
+    {:noreply, state}
+  end
+
+  def handle_info({:room_deleted, room_id, floor_id}, %{floor_id: floor_id} = state) do
+    case Registry.lookup(Localiser.Registry, {:room, room_id}) do
+      [{pid, _}] -> DynamicSupervisor.terminate_child(Room.Supervisor.via(floor_id), pid)
+      [] -> :ok
+    end
+
+    {:noreply, state}
+  end
+
+  def handle_info(_msg, state), do: {:noreply, state}
+end

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,

lib/localiser/localisation/tag/filter.ex

@@ -39,6 +39,8 @@ defmodule Localiser.Localisation.Tag.Filter do
     rooms = load_rooms()
     {:ok, filter_state} = filter_module.init([], [])
 
+    Phoenix.PubSub.subscribe(Localiser.PubSub, "rooms")
+
     state = %__MODULE__{
       tag_id: tag.tag_id,
       filter_module: filter_module,
@@ -77,6 +79,18 @@ defmodule Localiser.Localisation.Tag.Filter do
     end
   end
 
+  # Room geometry changed — reload the rooms cache so containment checks stay accurate.
+  @impl true
+  def handle_info({event, _}, state) when event in [:room_created, :room_updated] do
+    {:noreply, %{state | rooms: load_rooms()}}
+  end
+
+  def handle_info({:room_deleted, _room_id, _floor_id}, state) do
+    {:noreply, %{state | rooms: load_rooms()}}
+  end
+
+  def handle_info(_msg, state), do: {:noreply, state}
+
   defp load_rooms do
     Floors.list_floors_with_rooms()
     |> Enum.flat_map(& &1.rooms)

lib/localiser/localisation/tag/manager.ex

@@ -0,0 +1,43 @@
+defmodule Localiser.Localisation.Tag.Manager do
+  @moduledoc """
+  Global GenServer that reacts to tag lifecycle events and drives Filter.Supervisor.
+
+  - {:tag_enrolled, tag}    → start a Tag.Filter for the new tag
+  - {:tag_removed, tag_id}  → terminate the Tag.Filter
+  """
+
+  use GenServer
+
+  alias Localiser.Localisation.Filter
+
+  def start_link(_args) do
+    GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
+  end
+
+  @impl true
+  def init(:ok) do
+    Phoenix.PubSub.subscribe(Localiser.PubSub, "tags")
+    {:ok, :ok}
+  end
+
+  @impl true
+  def handle_info({:tag_enrolled, tag}, state) do
+    case Registry.lookup(Localiser.Registry, {:filter, tag.tag_id}) do
+      [] -> Filter.Supervisor.start_tag_filter(tag)
+      _ -> :ok
+    end
+
+    {:noreply, state}
+  end
+
+  def handle_info({:tag_removed, tag_id}, state) do
+    case Registry.lookup(Localiser.Registry, {:filter, tag_id}) do
+      [{pid, _}] -> DynamicSupervisor.terminate_child(Filter.Supervisor, pid)
+      [] -> :ok
+    end
+
+    {:noreply, state}
+  end
+
+  def handle_info(_msg, state), do: {:noreply, state}
+end

lib/localiser/rssi_buffer.ex

@@ -1,7 +1,6 @@
 defmodule Localiser.RSSI.Buffer do
   use GenServer
 
-  alias Localiser.Localisation
   alias Localiser.Localisation.Tag.Filter, as: TagFilter
   alias Localiser.Localisation.Sensor.Server, as: SensorServer