Close #5820 (Ability to delete a single skin)

osu.Game/Localisation/SkinSettingsStrings.cs

@@ -54,6 +54,11 @@ namespace osu.Game.Localisation
         /// </summary>
         public static LocalisableString ExportSkinButton => new TranslatableString(getKey(@"export_skin_button"), @"Export selected skin");
 
+        /// <summary>
+        /// "Delete selected skin"
+        /// </summary>
+        public static LocalisableString DeleteSkinButton => new TranslatableString(getKey(@"delete_skin_button"), @"Delete selected skin");
+
         private static string getKey(string key) => $"{prefix}:{key}";
     }
 }

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

@@ -16,6 +16,7 @@ using osu.Game.Configuration;
 using osu.Game.Database;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Localisation;
+using osu.Game.Screens.Select;
 using osu.Game.Skinning;
 using osu.Game.Skinning.Editor;
 using Realms;
@@ -67,6 +68,7 @@ namespace osu.Game.Overlays.Settings.Sections
                     Action = () => skinEditor?.ToggleVisibility(),
                 },
                 new ExportSkinButton(),
+                new DeleteSkinButton(),
             };
 
             config.BindWith(OsuSetting.Skin, configBindable);
@@ -202,5 +204,37 @@ namespace osu.Game.Overlays.Settings.Sections
                 }
             }
         }
+
+        public class DeleteSkinButton : DangerousSettingsButton
+        {
+            [Resolved]
+            private SkinManager skins { get; set; }
+
+            [Resolved(CanBeNull = true)]
+            private IDialogOverlay dialogOverlay { get; set; }
+
+            private Bindable<Skin> currentSkin;
+
+            [BackgroundDependencyLoader]
+            private void load()
+            {
+                Text = SkinSettingsStrings.DeleteSkinButton;
+                Action = delete;
+            }
+
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                currentSkin = skins.CurrentSkin.GetBoundCopy();
+                currentSkin.BindValueChanged(skin => Enabled.Value = skin.NewValue.SkinInfo.PerformRead(s => !s.Protected), true);
+            }
+
+            private void delete()
+            {
+                if (dialogOverlay != null)
+                    dialogOverlay.Push(new SkinDeleteDialog(currentSkin.Value));
+            }
+        }
     }
 }

osu.Game/Screens/Select/SkinDeleteDialog.cs

@@ -0,0 +1,48 @@
+// 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.Allocation;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Skinning;
+using osu.Game.Overlays.Dialog;
+using osu.Game.Database;
+
+namespace osu.Game.Screens.Select
+{
+    public class SkinDeleteDialog : PopupDialog
+    {
+        private SkinManager manager;
+
+        [BackgroundDependencyLoader]
+        private void load(SkinManager skinManager)
+        {
+            manager = skinManager;
+        }
+
+        public SkinDeleteDialog(Skin skin)
+        {
+            skin.SkinInfo.PerformRead(s =>
+            {
+                BodyText = s.Name;
+
+                Icon = FontAwesome.Regular.TrashAlt;
+                HeaderText = @"Confirm deletion of";
+                Buttons = new PopupDialogButton[]
+                {
+                    new PopupDialogDangerousButton
+                    {
+                        Text = @"Yes. Totally. Delete it.",
+                        Action = () => {
+                            manager.Delete(s);
+                            manager.CurrentSkinInfo.Value = DefaultSkin.CreateInfo().ToLiveUnmanaged();
+                        },
+                    },
+                    new PopupDialogCancelButton
+                    {
+                        Text = @"Firetruck, I didn't mean to!",
+                    },
+                };
+            });
+        }
+    }
+}