Add maintenance settings section for mod presets

osu.Game/Localisation/MaintenanceSettingsStrings.cs

@@ -74,6 +74,16 @@ namespace osu.Game.Localisation
         /// </summary>
         public static LocalisableString RestoreAllRecentlyDeletedBeatmaps => new TranslatableString(getKey(@"restore_all_recently_deleted_beatmaps"), @"Restore all recently deleted beatmaps");
 
+        /// <summary>
+        /// "Delete ALL mod presets"
+        /// </summary>
+        public static LocalisableString DeleteAllModPresets => new TranslatableString(getKey(@"delete_all_mod_presets"), @"Delete ALL mod presets");
+
+        /// <summary>
+        /// "Restore all recently deleted mod presets"
+        /// </summary>
+        public static LocalisableString RestoreAllRecentlyDeletedModPresets => new TranslatableString(getKey(@"restore_all_recently_deleted_mod_presets"), @"Restore all recently deleted mod presets");
+
         private static string getKey(string key) => $"{prefix}:{key}";
     }
 }

osu.Game/Overlays/Settings/Sections/Maintenance/ModPresetSettings.cs

@@ -0,0 +1,89 @@
+// 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.Linq;
+using System.Threading.Tasks;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Localisation;
+using osu.Framework.Logging;
+using osu.Game.Database;
+using osu.Game.Overlays.Notifications;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Localisation;
+
+namespace osu.Game.Overlays.Settings.Sections.Maintenance
+{
+    public class ModPresetSettings : SettingsSubsection
+    {
+        protected override LocalisableString Header => "Mod presets";
+
+        [Resolved]
+        private RealmAccess realm { get; set; } = null!;
+
+        [Resolved]
+        private INotificationOverlay? notificationOverlay { get; set; }
+
+        private SettingsButton undeleteButton = null!;
+        private SettingsButton deleteAllButton = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(IDialogOverlay? dialogOverlay)
+        {
+            AddRange(new Drawable[]
+            {
+                deleteAllButton = new DangerousSettingsButton
+                {
+                    Text = MaintenanceSettingsStrings.DeleteAllModPresets,
+                    Action = () =>
+                    {
+                        dialogOverlay?.Push(new MassDeleteConfirmationDialog(() =>
+                        {
+                            deleteAllButton.Enabled.Value = false;
+                            Task.Run(deleteAllModPresets).ContinueWith(t => Schedule(onAllModPresetsDeleted, t));
+                        }));
+                    }
+                },
+                undeleteButton = new SettingsButton
+                {
+                    Text = MaintenanceSettingsStrings.RestoreAllRecentlyDeletedModPresets,
+                    Action = () => Task.Run(undeleteModPresets).ContinueWith(t => Schedule(onModPresetsUndeleted, t))
+                }
+            });
+        }
+
+        private void deleteAllModPresets() =>
+            realm.Write(r =>
+            {
+                foreach (var preset in r.All<ModPreset>())
+                    preset.DeletePending = true;
+            });
+
+        private void onAllModPresetsDeleted(Task deletionTask)
+        {
+            deleteAllButton.Enabled.Value = true;
+
+            if (deletionTask.IsCompletedSuccessfully)
+                notificationOverlay?.Post(new ProgressCompletionNotification { Text = "Deleted all mod presets!" });
+            else if (deletionTask.IsFaulted)
+                Logger.Error(deletionTask.Exception, "Failed to delete all mod presets");
+        }
+
+        private void undeleteModPresets() =>
+            realm.Write(r =>
+            {
+                foreach (var preset in r.All<ModPreset>().Where(preset => preset.DeletePending))
+                    preset.DeletePending = false;
+            });
+
+        private void onModPresetsUndeleted(Task undeletionTask)
+        {
+            undeleteButton.Enabled.Value = true;
+
+            if (undeletionTask.IsCompletedSuccessfully)
+                notificationOverlay?.Post(new ProgressCompletionNotification { Text = "Restored all deleted mod presets!" });
+            else if (undeletionTask.IsFaulted)
+                Logger.Error(undeletionTask.Exception, "Failed to restore mod presets");
+        }
+    }
+}

osu.Game/Overlays/Settings/Sections/MaintenanceSection.cs

@@ -25,7 +25,8 @@ namespace osu.Game.Overlays.Settings.Sections
                 new BeatmapSettings(),
                 new SkinSettings(),
                 new CollectionsSettings(),
-                new ScoreSettings()
+                new ScoreSettings(),
+                new ModPresetSettings()
             };
         }
     }