Add the ability to click completed download notifications to select beatmap

Closes #2731.

osu.Game/Beatmaps/BeatmapManager.cs

@@ -45,6 +45,11 @@ namespace osu.Game.Beatmaps
         /// </summary>
         public event Action<DownloadBeatmapSetRequest> BeatmapDownloadBegan;
 
+        /// <summary>
+        /// Fired when a beatmap load is requested (into the interactive game UI).
+        /// </summary>
+        public Action<BeatmapSetInfo> PresentBeatmap;
+
         /// <summary>
         /// A default representation of a WorkingBeatmap to use when no beatmap is available.
         /// </summary>
@@ -163,12 +168,20 @@ namespace osu.Game.Beatmaps
 
                 Task.Factory.StartNew(() =>
                 {
+                    BeatmapSetInfo importedBeatmap;
+
                     // This gets scheduled back to the update thread, but we want the import to run in the background.
                     using (var stream = new MemoryStream(data))
                     using (var archive = new ZipArchiveReader(stream, beatmapSetInfo.ToString()))
-                        Import(archive);
+                        importedBeatmap = Import(archive);
 
+                    downloadNotification.CompletionClickAction = () =>
+                    {
+                        PresentBeatmap?.Invoke(importedBeatmap);
+                        return true;
+                    };
                     downloadNotification.State = ProgressNotificationState.Completed;
+
                     currentDownloads.Remove(request);
                 }, TaskCreationOptions.LongRunning);
             };

osu.Game/OsuGame.cs

@@ -23,6 +23,7 @@ using osu.Framework.Input;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Platform;
 using osu.Framework.Threading;
+using osu.Game.Beatmaps;
 using osu.Game.Graphics;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Overlays.Notifications;
@@ -33,6 +34,7 @@ using osu.Game.Rulesets.Mods;
 using osu.Game.Skinning;
 using OpenTK.Graphics;
 using osu.Game.Overlays.Volume;
+using osu.Game.Screens.Select;
 
 namespace osu.Game
 {
@@ -178,6 +180,30 @@ namespace osu.Game
         /// <param name="setId">The set to display.</param>
         public void ShowBeatmapSet(int setId) => beatmapSetOverlay.FetchAndShowBeatmapSet(setId);
 
+        /// <summary>
+        /// Present a beatmap at song select.
+        /// </summary>
+        /// <param name="beatmap">The beatmap to select.</param>
+        public void PresentBeatmap(BeatmapSetInfo beatmap)
+        {
+            CloseAllOverlays();
+
+            Beatmap.Value = BeatmapManager.GetWorkingBeatmap(beatmap.Beatmaps.First());
+
+            switch (currentScreen)
+            {
+                case SongSelect _:
+                    break;
+                default:
+                    // navigate to song select if we are not already there.
+                    var menu = (MainMenu)intro.ChildScreen;
+
+                    menu.MakeCurrent();
+                    menu.LoadToSolo();
+                    break;
+            }
+        }
+
         /// <summary>
         /// Show a user's profile as an overlay.
         /// </summary>
@@ -244,6 +270,7 @@ namespace osu.Game
             BeatmapManager.PostNotification = n => notifications?.Post(n);
 
             BeatmapManager.GetStableStorage = GetStorageForStableInstall;
+            BeatmapManager.PresentBeatmap = PresentBeatmap;
 
             AddRange(new Drawable[]
             {

osu.Game/Screens/Menu/MainMenu.cs

@@ -55,7 +55,7 @@ namespace osu.Game.Screens.Menu
                             OnChart = delegate { Push(new ChartListing()); },
                             OnDirect = delegate { Push(new OnlineListing()); },
                             OnEdit = delegate { Push(new Editor()); },
-                            OnSolo = delegate { Push(consumeSongSelect()); },
+                            OnSolo = onSolo,
                             OnMulti = delegate { Push(new Multiplayer()); },
                             OnExit = Exit,
                         }
@@ -85,6 +85,10 @@ namespace osu.Game.Screens.Menu
                 LoadComponentAsync(songSelect = new PlaySongSelect());
         }
 
+        public void LoadToSolo() => Schedule(onSolo);
+
+        private void onSolo() => Push(consumeSongSelect());
+
         private Screen consumeSongSelect()
         {
             var s = songSelect;