Add interface to handle local beatmap presentation logic

osu.Game/Screens/IHandlePresentBeatmap.cs

@@ -0,0 +1,23 @@
+// 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.Game.Beatmaps;
+using osu.Game.Rulesets;
+
+namespace osu.Game.Screens
+{
+    /// <summary>
+    /// Denotes a screen which can handle beatmap / ruleset selection via local logic.
+    /// This is used in the <see cref="OsuGame.PresentBeatmap"/> flow to handle cases which require custom logic,
+    /// for instance, if a lease is held on the Beatmap.
+    /// </summary>
+    public interface IHandlePresentBeatmap
+    {
+        /// <summary>
+        /// Invoked with a requested beatmap / ruleset for selection.
+        /// </summary>
+        /// <param name="beatmap">The beatmap to be selected.</param>
+        /// <param name="ruleset">The ruleset to be selected.</param>
+        public void PresentBeatmap(WorkingBeatmap beatmap, RulesetInfo ruleset);
+    }
+}