Remove unecessary third generic and change usages to match

osu.Game/Beatmaps/BeatmapManager.cs

@@ -25,7 +25,7 @@ namespace osu.Game.Beatmaps
     /// <summary>
     /// Handles the storage and retrieval of Beatmaps/WorkingBeatmaps.
     /// </summary>
-    public partial class BeatmapManager : ArchiveDownloadModelManager<BeatmapSetInfo, BeatmapSetFileInfo, DownloadBeatmapSetRequest>
+    public partial class BeatmapManager : ArchiveDownloadModelManager<BeatmapSetInfo, BeatmapSetFileInfo>
     {
         /// <summary>
         /// Fired when a single difficulty has been hidden.
@@ -58,8 +58,6 @@ namespace osu.Game.Beatmaps
 
         private readonly GameHost host;
 
-        private readonly List<DownloadBeatmapSetRequest> currentDownloads = new List<DownloadBeatmapSetRequest>();
-
         public BeatmapManager(Storage storage, IDatabaseContextFactory contextFactory, RulesetStore rulesets, IAPIProvider api, AudioManager audioManager, GameHost host = null,
                               WorkingBeatmap defaultBeatmap = null)
             : base(storage, contextFactory, api, new BeatmapStore(contextFactory), host)
@@ -76,7 +74,7 @@ namespace osu.Game.Beatmaps
             beatmaps.BeatmapRestored += b => BeatmapRestored?.Invoke(b);
         }
 
-        protected override DownloadBeatmapSetRequest CreateDownloadRequest(BeatmapSetInfo set, object[] options) => new DownloadBeatmapSetRequest(set, (options?.FirstOrDefault() as bool?) ?? false);
+        protected override ArchiveDownloadModelRequest<BeatmapSetInfo> CreateDownloadRequest(BeatmapSetInfo set, object[] options) => new DownloadBeatmapSetRequest(set, (options?.FirstOrDefault() as bool?) ?? false);
 
         protected override void Populate(BeatmapSetInfo beatmapSet, ArchiveReader archive)
         {

osu.Game/Database/ArchiveDownloadModelManager.cs

@@ -18,25 +18,23 @@ namespace osu.Game.Database
     /// </summary>
     /// <typeparam name="TModel">The model type.</typeparam>
     /// <typeparam name="TFileModel">The associated file join type.</typeparam>
-    /// <typeparam name="TDownloadRequestModel">The associated <see cref="ArchiveDownloadModelRequest{TModel}"/> for this model.</typeparam>
+    public abstract class ArchiveDownloadModelManager<TModel, TFileModel> : ArchiveModelManager<TModel, TFileModel>
-    public abstract class ArchiveDownloadModelManager<TModel, TFileModel, TDownloadRequestModel> : ArchiveModelManager<TModel, TFileModel>
         where TModel : class, IHasFiles<TFileModel>, IHasPrimaryKey, ISoftDelete
         where TFileModel : INamedFileInfo, new()
-        where TDownloadRequestModel : ArchiveDownloadModelRequest<TModel>
     {
         /// <summary>
         /// Fired when a <see cref="TModel"/> download begins.
         /// </summary>
-        public event Action<TDownloadRequestModel> DownloadBegan;
+        public event Action<ArchiveDownloadModelRequest<TModel>> DownloadBegan;
 
         /// <summary>
         /// Fired when a <see cref="TModel"/> download is interrupted, either due to user cancellation or failure.
         /// </summary>
-        public event Action<TDownloadRequestModel> DownloadFailed;
+        public event Action<ArchiveDownloadModelRequest<TModel>> DownloadFailed;
 
         private readonly IAPIProvider api;
 
-        private readonly List<TDownloadRequestModel> currentDownloads = new List<TDownloadRequestModel>();
+        private readonly List<ArchiveDownloadModelRequest<TModel>> currentDownloads = new List<ArchiveDownloadModelRequest<TModel>>();
 
         private readonly MutableDatabaseBackedStoreWithFileIncludes<TModel, TFileModel> modelStore;
 
@@ -55,7 +53,7 @@ namespace osu.Game.Database
         /// <param name="model">The <see cref="TModel"/> to be downloaded.</param>
         /// <param name="options">Extra parameters for request creation, null if none were passed.</param>
         /// <returns>The request object.</returns>
-        protected abstract TDownloadRequestModel CreateDownloadRequest(TModel model, object[] options);
+        protected abstract ArchiveDownloadModelRequest<TModel> CreateDownloadRequest(TModel model, object[] options);
 
         /// <summary>
         /// Downloads a <see cref="TModel"/>.
@@ -102,12 +100,12 @@ namespace osu.Game.Database
         /// Gets an existing <see cref="TModel"/> download request if it exists.
         /// </summary>
         /// <param name="model">The <see cref="TModel"/> whose request is wanted.</param>
-        /// <returns>The <see cref="TDownloadRequestModel"/> object if it exists, otherwise null.</returns>
+        /// <returns>The <see cref="ArchiveDownloadModelRequest{TModel}"/> object if it exists, otherwise null.</returns>
-        public TDownloadRequestModel GetExistingDownload(TModel model) => currentDownloads.Find(r => r.Info.Equals(model));
+        public ArchiveDownloadModelRequest<TModel> GetExistingDownload(TModel model) => currentDownloads.Find(r => r.Info.Equals(model));
 
         private bool canDownload(TModel model) => GetExistingDownload(model) == null && api != null;
 
-        private void performDownloadWithRequest(TDownloadRequestModel request)
+        private void performDownloadWithRequest(ArchiveDownloadModelRequest<TModel> request)
         {
             DownloadNotification notification = new DownloadNotification
             {

osu.Game/Online/API/Requests/DownloadBeatmapSetRequest.cs

@@ -7,17 +7,16 @@ namespace osu.Game.Online.API.Requests
 {
     public class DownloadBeatmapSetRequest : ArchiveDownloadModelRequest<BeatmapSetInfo>
     {
-        public readonly BeatmapSetInfo BeatmapSet;
-
         private readonly bool noVideo;
+        private readonly BeatmapSetInfo set;
 
         public DownloadBeatmapSetRequest(BeatmapSetInfo set, bool noVideo)
             : base(set)
         {
             this.noVideo = noVideo;
-            BeatmapSet = set;
+            this.set = set;
         }
 
-        protected override string Target => $@"beatmapsets/{BeatmapSet.OnlineBeatmapSetID}/download{(noVideo ? "?noVideo=1" : "")}";
+        protected override string Target => $@"beatmapsets/{set.OnlineBeatmapSetID}/download{(noVideo ? "?noVideo=1" : "")}";
     }
 }

osu.Game/Overlays/Direct/DownloadTrackingComposite.cs

@@ -7,7 +7,7 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Beatmaps;
-using osu.Game.Online.API.Requests;
+using osu.Game.Online.API;
 
 namespace osu.Game.Overlays.Direct
 {
@@ -49,7 +49,7 @@ namespace osu.Game.Overlays.Direct
 
             beatmaps.DownloadBegan += download =>
             {
-                if (download.BeatmapSet.OnlineBeatmapSetID == BeatmapSet.Value?.OnlineBeatmapSetID)
+                if (download.Info.OnlineBeatmapSetID == BeatmapSet.Value?.OnlineBeatmapSetID)
                     attachDownload(download);
             };
 
@@ -76,9 +76,9 @@ namespace osu.Game.Overlays.Direct
 
         #endregion
 
-        private DownloadBeatmapSetRequest attachedRequest;
+        private ArchiveDownloadModelRequest<BeatmapSetInfo> attachedRequest;
 
-        private void attachDownload(DownloadBeatmapSetRequest request)
+        private void attachDownload(ArchiveDownloadModelRequest<BeatmapSetInfo> request)
         {
             if (attachedRequest != null)
             {