Add menu item to delete all beatmap sets in filter groups

osu.Game/Localisation/SongSelectStrings.cs

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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.Localisation;
@@ -149,6 +149,11 @@ public static class SongSelectStrings
         /// </summary>
         public static LocalisableString RestoreAllHidden => new TranslatableString(getKey(@"restore_all_hidden"), @"Restore all hidden");
 
+        /// <summary>
+        /// "Delete all in group"
+        /// </summary>
+        public static LocalisableString DeleteAllInGroup => new TranslatableString(getKey(@"delete_all_in_group"), @"Delete all in group");
+
         /// <summary>
         /// "{0} stars"
         /// </summary>

osu.Game/Screens/Select/BeatmapCarousel.cs

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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;
@@ -63,6 +63,15 @@ public partial class BeatmapCarousel : Carousel<BeatmapInfo>
         /// </summary>
         public int MatchedBeatmapsCount => Filters.Last().BeatmapItemsCount;
 
+        /// <summary>
+        /// Retrieves all beatmap sets which are currently contained within the specified <see cref="GroupDefinition"/>.
+        /// </summary>
+        /// <param name="group">The group to retrieve beatmap sets for.</param>
+        public IEnumerable<BeatmapSetInfo> GetBeatmapSetsForGroup(GroupDefinition group)
+            => grouping.SetItems.Keys
+                       .Where(set => EqualityComparer<GroupDefinition?>.Default.Equals(set.Group, group))
+                       .Select(set => set.BeatmapSet);
+
         protected override float GetSpacingBetweenPanels(CarouselItem top, CarouselItem bottom)
         {
             // Group panels do not overlap with any other panel but should overlap with themselves.

osu.Game/Screens/Select/BeatmapGroupDeleteDialog.cs

@@ -0,0 +1,32 @@
+// 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.Collections.Generic;
+using osu.Framework.Allocation;
+using osu.Game.Beatmaps;
+using osu.Game.Overlays.Dialog;
+
+namespace osu.Game.Screens.Select
+{
+    public partial class BeatmapGroupDeleteDialog : DeletionDialog
+    {
+        private readonly IReadOnlyList<BeatmapSetInfo> beatmapSets;
+
+        public BeatmapGroupDeleteDialog(GroupDefinition group, IReadOnlyList<BeatmapSetInfo> beatmapSets)
+        {
+            this.beatmapSets = beatmapSets;
+            BodyText = group.Title;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(BeatmapManager beatmapManager)
+        {
+            DangerousAction = () =>
+            {
+                foreach (var set in beatmapSets)
+                    beatmapManager.Delete(set);
+            };
+        }
+    }
+}
+

osu.Game/Screens/Select/ISongSelect.cs

@@ -26,6 +26,12 @@ public interface ISongSelect
         /// </summary>
         void RestoreAllHidden(BeatmapSetInfo beatmapSet);
 
+        /// <summary>
+        /// Requests the user for confirmation to delete all beatmap sets contained within the given group.
+        /// </summary>
+        /// <param name="group">The group whose contents should be deleted.</param>
+        void DeleteGroup(GroupDefinition group);
+
         /// <summary>
         /// Opens the manage collections dialog.
         /// </summary>

osu.Game/Screens/Select/PanelGroup.cs

@@ -17,6 +17,7 @@
 using osu.Game.Graphics.Carousel;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
+using osu.Game.Localisation;
 using osu.Game.Overlays;
 using osuTK;
 using osuTK.Graphics;
@@ -38,6 +39,9 @@ public partial class PanelGroup : Panel
         [Resolved]
         private OverlayColourProvider colourProvider { get; set; } = null!;
 
+        [Resolved]
+        private ISongSelect? songSelect { get; set; }
+
         [BackgroundDependencyLoader]
         private void load()
         {
@@ -168,9 +172,29 @@ public override MenuItem[] ContextMenuItems
                 if (Item == null)
                     return Array.Empty<MenuItem>();
 
+                var group = (GroupDefinition)Item.Model;
+
+                var expandItem = new OsuMenuItem(
+                    Expanded.Value ? WebCommonStrings.ButtonsCollapse.ToSentence() : WebCommonStrings.ButtonsExpand.ToSentence(),
+                    MenuItemType.Highlighted,
+                    () => TriggerClick());
+
+                if (songSelect == null)
+                {
+                    return new MenuItem[]
+                    {
+                        expandItem
+                    };
+                }
+
                 return new MenuItem[]
                 {
-                    new OsuMenuItem(Expanded.Value ? WebCommonStrings.ButtonsCollapse.ToSentence() : WebCommonStrings.ButtonsExpand.ToSentence(), MenuItemType.Highlighted, () => TriggerClick())
+                    expandItem,
+                    new OsuMenuItemSpacer(),
+                    new OsuMenuItem(
+                        SongSelectStrings.DeleteAllInGroup,
+                        MenuItemType.Destructive,
+                        () => songSelect.DeleteGroup(group))
                 };
             }
         }

osu.Game/Screens/Select/SongSelect.cs

@@ -1246,6 +1246,19 @@ protected IEnumerable<OsuMenuItem> CreateCollectionMenuActions(BeatmapInfo beatm
 
         public void Delete(BeatmapSetInfo beatmapSet) => dialogOverlay?.Push(new BeatmapDeleteDialog(beatmapSet));
 
+        public void DeleteGroup(GroupDefinition group)
+        {
+            if (dialogOverlay == null)
+                return;
+
+            var beatmapSets = carousel.GetBeatmapSetsForGroup(group).ToArray();
+
+            if (beatmapSets.Length == 0)
+                return;
+
+            dialogOverlay.Push(new BeatmapGroupDeleteDialog(group, beatmapSets));
+        }
+
         public void RestoreAllHidden(BeatmapSetInfo beatmapSet)
         {
             foreach (var b in beatmapSet.Beatmaps)