Context menu for duplicating multi rooms

osu.Game/Online/Multiplayer/Room.cs

@@ -103,31 +103,28 @@ namespace osu.Game.Online.Multiplayer
         [JsonIgnore]
         public readonly Bindable<int> Position = new Bindable<int>(-1);
 
-        public void CopyFrom(Room other)
+        /// <summary>
+        /// Copies the properties from another <see cref="Room"/> to this room.
+        /// </summary>
+        /// <param name="other">The room to copy</param>
+        /// <param name="duplicate">Whether the copy should exclude information unique to a specific room (i.e. when duplicating a room)</param>
+        public void CopyFrom(Room other, bool duplicate = false)
+        {
+            if (!duplicate)
             {
                 RoomID.Value = other.RoomID.Value;
-            Name.Value = other.Name.Value;
 
                 if (other.Host.Value != null && Host.Value?.Id != other.Host.Value.Id)
                     Host.Value = other.Host.Value;
 
                 ChannelId.Value = other.ChannelId.Value;
                 Status.Value = other.Status.Value;
-            Availability.Value = other.Availability.Value;
-            Type.Value = other.Type.Value;
-            MaxParticipants.Value = other.MaxParticipants.Value;
                 ParticipantCount.Value = other.ParticipantCount.Value;
                 EndDate.Value = other.EndDate.Value;
 
                 if (DateTimeOffset.Now >= EndDate.Value)
                     Status.Value = new RoomStatusEnded();
 
-            if (!Playlist.SequenceEqual(other.Playlist))
-            {
-                Playlist.Clear();
-                Playlist.AddRange(other.Playlist);
-            }
-
                 if (!RecentParticipants.SequenceEqual(other.RecentParticipants))
                 {
                     RecentParticipants.Clear();
@@ -137,6 +134,19 @@ namespace osu.Game.Online.Multiplayer
                 Position.Value = other.Position.Value;
             }
 
+            Name.Value = other.Name.Value;
+
+            Availability.Value = other.Availability.Value;
+            Type.Value = other.Type.Value;
+            MaxParticipants.Value = other.MaxParticipants.Value;
+
+            if (!Playlist.SequenceEqual(other.Playlist))
+            {
+                Playlist.Clear();
+                Playlist.AddRange(other.Playlist);
+            }
+        }
+
         public bool ShouldSerializeRoomID() => false;
         public bool ShouldSerializeHost() => false;
         public bool ShouldSerializeEndDate() => false;

osu.Game/Screens/Multi/Lounge/Components/DrawableRoom.cs

@@ -21,10 +21,12 @@ using osu.Game.Online.Multiplayer;
 using osu.Game.Screens.Multi.Components;
 using osuTK;
 using osuTK.Graphics;
+using osu.Framework.Graphics.Cursor;
+using osu.Framework.Graphics.UserInterface;
 
 namespace osu.Game.Screens.Multi.Lounge.Components
 {
-    public class DrawableRoom : OsuClickableContainer, IStateful<SelectionState>, IFilterable
+    public class DrawableRoom : OsuClickableContainer, IStateful<SelectionState>, IFilterable, IHasContextMenu
     {
         public const float SELECTION_BORDER_WIDTH = 4;
         private const float corner_radius = 5;
@@ -36,6 +38,8 @@ namespace osu.Game.Screens.Multi.Lounge.Components
 
         public event Action<SelectionState> StateChanged;
 
+        public Action<Room> DuplicateRoom;
+
         private readonly Box selectionBox;
         private CachedModelDependencyContainer<Room> dependencies;
 
@@ -232,5 +236,10 @@ namespace osu.Game.Screens.Multi.Lounge.Components
                 Current = name;
             }
         }
+
+        public MenuItem[] ContextMenuItems => new MenuItem[]
+        {
+            new OsuMenuItem("Duplicate", MenuItemType.Standard, () => DuplicateRoom?.Invoke(Room))
+        };
     }
 }

osu.Game/Screens/Multi/Lounge/Components/RoomsContainer.cs

@@ -16,6 +16,7 @@ using osu.Game.Graphics.UserInterface;
 using osu.Game.Input.Bindings;
 using osu.Game.Online.Multiplayer;
 using osuTK;
+using osu.Game.Graphics.Cursor;
 
 namespace osu.Game.Screens.Multi.Lounge.Components
 {
@@ -37,17 +38,24 @@ namespace osu.Game.Screens.Multi.Lounge.Components
         [Resolved]
         private IRoomManager roomManager { get; set; }
 
+        public Action<Room> DuplicateRoom;
+
         public RoomsContainer()
         {
             RelativeSizeAxes = Axes.X;
             AutoSizeAxes = Axes.Y;
 
-            InternalChild = roomFlow = new FillFlowContainer<DrawableRoom>
+            InternalChild = new OsuContextMenuContainer
+            {
+                RelativeSizeAxes = Axes.X,
+                AutoSizeAxes = Axes.Y,
+                Child = roomFlow = new FillFlowContainer<DrawableRoom>
                 {
                     RelativeSizeAxes = Axes.X,
                     AutoSizeAxes = Axes.Y,
                     Direction = FillDirection.Vertical,
                     Spacing = new Vector2(2),
+                }
             };
         }
 
@@ -88,6 +96,7 @@ namespace osu.Game.Screens.Multi.Lounge.Components
             {
                 roomFlow.Add(new DrawableRoom(room)
                 {
+                    DuplicateRoom = DuplicateRoom,
                     Action = () =>
                     {
                         if (room == selectedRoom.Value)

osu.Game/Screens/Multi/Lounge/LoungeSubScreen.cs

@@ -62,7 +62,18 @@ namespace osu.Game.Screens.Multi.Lounge
                                     RelativeSizeAxes = Axes.Both,
                                     ScrollbarOverlapsContent = false,
                                     Padding = new MarginPadding(10),
-                                    Child = roomsContainer = new RoomsContainer { JoinRequested = joinRequested }
+                                    Child = roomsContainer = new RoomsContainer
+                                    {
+                                        JoinRequested = joinRequested,
+                                        DuplicateRoom = room =>
+                                        {
+                                            Room newRoom = new Room();
+                                            newRoom.CopyFrom(room, true);
+                                            newRoom.Name.Value = $"Copy of {room.Name.Value}";
+
+                                            Open(newRoom);
+                                        }
+                                    }
                                 },
                                 loadingLayer = new LoadingLayer(roomsContainer),
                             }
@@ -126,7 +137,7 @@ namespace osu.Game.Screens.Multi.Lounge
             if (selectedRoom.Value?.RoomID.Value == null)
                 selectedRoom.Value = new Room();
 
-            music.EnsurePlayingSomething();
+            music?.EnsurePlayingSomething();
 
             onReturning();
         }

osu.Game/Screens/Multi/Multiplayer.cs

@@ -51,7 +51,7 @@ namespace osu.Game.Screens.Multi
         [Cached]
         private readonly Bindable<FilterCriteria> currentFilter = new Bindable<FilterCriteria>(new FilterCriteria());
 
-        [Resolved]
+        [Resolved(CanBeNull = true)]
         private MusicController music { get; set; }
 
         [Cached(Type = typeof(IRoomManager))]
@@ -350,7 +350,7 @@ namespace osu.Game.Screens.Multi
                     track.RestartPoint = Beatmap.Value.Metadata.PreviewTime;
                     track.Looping = true;
 
-                    music.EnsurePlayingSomething();
+                    music?.EnsurePlayingSomething();
                 }
             }
             else