Add ServerShuttingDownCountdown

osu.Game/Online/Multiplayer/MultiplayerClient.cs

@@ -18,6 +18,7 @@ using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Online.Multiplayer.Countdown;
 using osu.Game.Online.Rooms;
 using osu.Game.Online.Rooms.RoomStatuses;
+using osu.Game.Overlays.Notifications;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Utils;
@@ -26,6 +27,8 @@ namespace osu.Game.Online.Multiplayer
 {
     public abstract class MultiplayerClient : Component, IMultiplayerClient, IMultiplayerRoomServer
     {
+        public Action<Notification>? PostNotification { protected get; set; }
+
         /// <summary>
         /// Invoked when any change occurs to the multiplayer room.
         /// </summary>
@@ -554,6 +557,14 @@ namespace osu.Game.Online.Multiplayer
                 {
                     case CountdownStartedEvent countdownStartedEvent:
                         Room.ActiveCountdowns.Add(countdownStartedEvent.Countdown);
+
+                        switch (countdownStartedEvent.Countdown)
+                        {
+                            case ServerShuttingDownCountdown:
+                                postServerShuttingDownNotification();
+                                break;
+                        }
+
                         break;
 
                     case CountdownStoppedEvent countdownStoppedEvent:
@@ -569,6 +580,21 @@ namespace osu.Game.Online.Multiplayer
             return Task.CompletedTask;
         }
 
+        private void postServerShuttingDownNotification()
+        {
+            ServerShuttingDownCountdown? countdown = room?.ActiveCountdowns.OfType<ServerShuttingDownCountdown>().FirstOrDefault();
+
+            if (countdown == null)
+                return;
+
+            PostNotification?.Invoke(new SimpleNotification
+            {
+                Text = countdown.FinalNotification
+                    ? $"The multiplayer server is restarting in {countdown.TimeRemaining:hh\\:mm\\:ss}. This multiplayer room will be closed shortly."
+                    : $"The multiplayer server is restarting in {countdown.TimeRemaining:hh\\:mm\\:ss}."
+            });
+        }
+
         Task IMultiplayerClient.UserBeatmapAvailabilityChanged(int userId, BeatmapAvailability beatmapAvailability)
         {
             Scheduler.Add(() =>

osu.Game/Online/Multiplayer/MultiplayerCountdown.cs

@@ -13,6 +13,7 @@ namespace osu.Game.Online.Multiplayer
     [MessagePackObject]
     [Union(0, typeof(MatchStartCountdown))] // IMPORTANT: Add rules to SignalRUnionWorkaroundResolver for new derived types.
     [Union(1, typeof(ForceGameplayStartCountdown))]
+    [Union(2, typeof(ServerShuttingDownCountdown))]
     public abstract class MultiplayerCountdown
     {
         /// <summary>

osu.Game/Online/Multiplayer/ServerShuttingDownCountdown.cs

@@ -0,0 +1,20 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using MessagePack;
+
+namespace osu.Game.Online.Multiplayer
+{
+    /// <summary>
+    /// A countdown that indicates the current multiplayer server is shutting down.
+    /// </summary>
+    [MessagePackObject]
+    public class ServerShuttingDownCountdown : MultiplayerCountdown
+    {
+        /// <summary>
+        /// If this is the final notification, no more <see cref="ServerShuttingDownCountdown"/> events will be sent after this.
+        /// </summary>
+        [Key(2)]
+        public bool FinalNotification { get; set; }
+    }
+}

osu.Game/Online/SignalRWorkaroundTypes.cs

@@ -28,7 +28,8 @@ namespace osu.Game.Online
             (typeof(TeamVersusRoomState), typeof(MatchRoomState)),
             (typeof(TeamVersusUserState), typeof(MatchUserState)),
             (typeof(MatchStartCountdown), typeof(MultiplayerCountdown)),
-            (typeof(ForceGameplayStartCountdown), typeof(MultiplayerCountdown))
+            (typeof(ForceGameplayStartCountdown), typeof(MultiplayerCountdown)),
+            (typeof(ServerShuttingDownCountdown), typeof(MultiplayerCountdown)),
         };
     }
 }

osu.Game/OsuGame.cs

@@ -730,6 +730,8 @@ namespace osu.Game
             ScoreManager.PostNotification = n => Notifications.Post(n);
             ScoreManager.PresentImport = items => PresentScore(items.First().Value);
 
+            MultiplayerClient.PostNotification = n => Notifications.Post(n);
+
             // make config aware of how to lookup skins for on-screen display purposes.
             // if this becomes a more common thing, tracked settings should be reconsidered to allow local DI.
             LocalConfig.LookupSkinName = id => SkinManager.Query(s => s.ID == id)?.ToString() ?? "Unknown";

osu.Game/OsuGameBase.cs

@@ -179,7 +179,7 @@ namespace osu.Game
 
         private SpectatorClient spectatorClient;
 
-        private MultiplayerClient multiplayerClient;
+        protected MultiplayerClient MultiplayerClient { get; private set; }
 
         private MetadataClient metadataClient;
 
@@ -284,7 +284,7 @@ namespace osu.Game
             // TODO: OsuGame or OsuGameBase?
             dependencies.CacheAs(beatmapUpdater = new BeatmapUpdater(BeatmapManager, difficultyCache, API, Storage));
             dependencies.CacheAs(spectatorClient = new OnlineSpectatorClient(endpoints));
-            dependencies.CacheAs(multiplayerClient = new OnlineMultiplayerClient(endpoints));
+            dependencies.CacheAs(MultiplayerClient = new OnlineMultiplayerClient(endpoints));
             dependencies.CacheAs(metadataClient = new OnlineMetadataClient(endpoints));
 
             AddInternal(new BeatmapOnlineChangeIngest(beatmapUpdater, realm, metadataClient));
@@ -329,7 +329,7 @@ namespace osu.Game
                 AddInternal(apiAccess);
 
             AddInternal(spectatorClient);
-            AddInternal(multiplayerClient);
+            AddInternal(MultiplayerClient);
             AddInternal(metadataClient);
 
             AddInternal(rulesetConfigCache);