Replace BeatmapCollection with RealmBeatmapCollection

osu.Game/Collections/BeatmapCollection.cs

@@ -1,32 +1,50 @@
 // 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.
 
-#nullable disable
-
 using System;
-using osu.Framework.Bindables;
+using System.Collections.Generic;
+using JetBrains.Annotations;
 using osu.Game.Beatmaps;
+using osu.Game.Database;
+using Realms;
 
 namespace osu.Game.Collections
 {
     /// <summary>
     /// A collection of beatmaps grouped by a name.
     /// </summary>
-    public class BeatmapCollection
+    public class BeatmapCollection : RealmObject, IHasGuidPrimaryKey
     {
+        [PrimaryKey]
+        public Guid ID { get; set; }
+
         /// <summary>
         /// The collection's name.
         /// </summary>
-        public readonly Bindable<string> Name = new Bindable<string>();
+        public string Name { get; set; } = string.Empty;
 
         /// <summary>
         /// The <see cref="BeatmapInfo.MD5Hash"/>es of beatmaps contained by the collection.
         /// </summary>
-        public readonly BindableList<string> BeatmapHashes = new BindableList<string>();
+        public IList<string> BeatmapMD5Hashes { get; } = null!;
 
         /// <summary>
         /// The date when this collection was last modified.
         /// </summary>
-        public DateTimeOffset LastModifyDate { get; private set; } = DateTimeOffset.UtcNow;
+        public DateTimeOffset LastModified { get; set; }
+
+        public BeatmapCollection(string? name = null, IList<string>? beatmapMD5Hashes = null)
+        {
+            ID = Guid.NewGuid();
+            Name = name ?? string.Empty;
+            BeatmapMD5Hashes = beatmapMD5Hashes ?? new List<string>();
+
+            LastModified = DateTimeOffset.UtcNow;
+        }
+
+        [UsedImplicitly]
+        private BeatmapCollection()
+        {
+        }
     }
 }