oneshot

lib/rsh26pool/room_closer.ex

@@ -0,0 +1,45 @@
+defmodule Rsh26pool.RoomCloser do
+  @moduledoc """
+  Periodically closes rooms whose `closes_at` deadline has passed (the "auto
+  end" feature). Closing broadcasts to any connected LiveViews so open pages
+  transition to the results/grouping view without a manual refresh.
+  """
+  use GenServer
+
+  require Logger
+
+  alias Rsh26pool.Voting
+
+  @interval :timer.seconds(10)
+
+  def start_link(opts) do
+    GenServer.start_link(__MODULE__, opts, name: __MODULE__)
+  end
+
+  @impl true
+  def init(_opts) do
+    schedule()
+    {:ok, %{}}
+  end
+
+  @impl true
+  def handle_info(:sweep, state) do
+    sweep()
+    schedule()
+    {:noreply, state}
+  end
+
+  defp sweep do
+    for room <- Voting.list_rooms_to_auto_close() do
+      case Voting.close_room(room) do
+        {:ok, _} ->
+          :ok
+
+        other ->
+          Logger.warning("RoomCloser failed to close room #{room.id}: #{inspect(other)}")
+      end
+    end
+  end
+
+  defp schedule, do: Process.send_after(self(), :sweep, @interval)
+end