Add skinnable team flag

osu.Game/Screens/Play/HUD/PlayerTeamFlag.cs

@@ -0,0 +1,56 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Skinning;
+using osu.Game.Users.Drawables;
+using osuTK;
+
+namespace osu.Game.Screens.Play.HUD
+{
+    public partial class PlayerTeamFlag : CompositeDrawable, ISerialisableDrawable
+    {
+        protected override bool ReceivePositionalInputAtSubTree(Vector2 screenSpacePos) => false;
+
+        private readonly UpdateableTeamFlag flag;
+
+        private const float default_size = 40f;
+
+        [Resolved]
+        private GameplayState? gameplayState { get; set; }
+
+        [Resolved]
+        private IAPIProvider api { get; set; } = null!;
+
+        private IBindable<APIUser>? apiUser;
+
+        public PlayerTeamFlag()
+        {
+            Size = new Vector2(default_size, default_size / 2f);
+
+            InternalChild = flag = new UpdateableTeamFlag
+            {
+                RelativeSizeAxes = Axes.Both,
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            if (gameplayState != null)
+                flag.Team = gameplayState.Score.ScoreInfo.User.Team;
+            else
+            {
+                apiUser = api.LocalUser.GetBoundCopy();
+                apiUser.BindValueChanged(u => flag.Team = u.NewValue.Team, true);
+            }
+        }
+
+        public bool UsesFixedAnchor { get; set; }
+    }
+}