Add model class for realm skin

osu.Game/Models/RealmSkin.cs

@@ -0,0 +1,67 @@
+// 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 System;
+using System.Collections.Generic;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Testing;
+using osu.Game.Database;
+using osu.Game.Extensions;
+using osu.Game.IO;
+using osu.Game.Skinning;
+using Realms;
+
+#nullable enable
+
+namespace osu.Game.Models
+{
+    [ExcludeFromDynamicCompile]
+    [MapTo("Skin")]
+    public class RealmSkin : RealmObject, IHasRealmFiles, IEquatable<RealmSkin>, IHasGuidPrimaryKey, ISoftDelete
+    {
+        public Guid ID { get; set; }
+
+        public string Name { get; set; } = string.Empty;
+
+        public string Creator { get; set; } = string.Empty;
+
+        public string Hash { get; set; } = string.Empty;
+
+        public string InstantiationInfo { get; set; } = string.Empty;
+
+        public virtual Skin CreateInstance(IStorageResourceProvider resources)
+        {
+            var type = string.IsNullOrEmpty(InstantiationInfo)
+                // handle the case of skins imported before InstantiationInfo was added.
+                ? typeof(LegacySkin)
+                : Type.GetType(InstantiationInfo).AsNonNull();
+
+            return (Skin)Activator.CreateInstance(type, this, resources);
+        }
+
+        public IList<RealmNamedFileUsage> Files { get; } = null!;
+
+        public bool DeletePending { get; set; }
+
+        public static RealmSkin Default { get; } = new RealmSkin
+        {
+            Name = "osu! (triangles)",
+            Creator = "team osu!",
+            InstantiationInfo = typeof(DefaultSkin).GetInvariantInstantiationInfo()
+        };
+
+        public bool Equals(RealmSkin? other)
+        {
+            if (ReferenceEquals(this, other)) return true;
+            if (other == null) return false;
+
+            return ID == other.ID;
+        }
+
+        public override string ToString()
+        {
+            string author = string.IsNullOrEmpty(Creator) ? string.Empty : $"({Creator})";
+            return $"{Name} {author}".Trim();
+        }
+    }
+}