Extract common implementation of delete dialog

osu.Game/Overlays/Dialog/DeleteConfirmationDialog.cs

@@ -0,0 +1,42 @@
+// 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;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Localisation;
+
+namespace osu.Game.Overlays.Dialog
+{
+    /// <summary>
+    /// Base class for various confirmation dialogs that concern deletion actions.
+    /// Differs from <see cref="ConfirmDialog"/> in that the confirmation button is a "dangerous" one
+    /// (requires the confirm button to be held).
+    /// </summary>
+    public abstract class DeleteConfirmationDialog : PopupDialog
+    {
+        /// <summary>
+        /// The action which performs the deletion.
+        /// </summary>
+        protected Action? DeleteAction { get; set; }
+
+        protected DeleteConfirmationDialog()
+        {
+            HeaderText = DeleteConfirmationDialogStrings.HeaderText;
+
+            Icon = FontAwesome.Regular.TrashAlt;
+
+            Buttons = new PopupDialogButton[]
+            {
+                new PopupDialogDangerousButton
+                {
+                    Text = DeleteConfirmationDialogStrings.Confirm,
+                    Action = () => DeleteAction?.Invoke()
+                },
+                new PopupDialogCancelButton
+                {
+                    Text = DeleteConfirmationDialogStrings.Cancel
+                }
+            };
+        }
+    }
+}