From c901a4fd7e5c25b816cf4fa2280b6c1c175046a7 Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Fri, 19 Nov 2021 13:27:28 +0900
Subject: [PATCH] Show better error message when selecting an unavailable
 beatmap during multiplayer room creation

---
 .../Match/MultiplayerMatchSettingsOverlay.cs       | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/osu.Game/Screens/OnlinePlay/Multiplayer/Match/MultiplayerMatchSettingsOverlay.cs b/osu.Game/Screens/OnlinePlay/Multiplayer/Match/MultiplayerMatchSettingsOverlay.cs
index 5bc76a10bc..90feea4e6e 100644
--- a/osu.Game/Screens/OnlinePlay/Multiplayer/Match/MultiplayerMatchSettingsOverlay.cs
+++ b/osu.Game/Screens/OnlinePlay/Multiplayer/Match/MultiplayerMatchSettingsOverlay.cs
@@ -365,7 +365,19 @@ namespace osu.Game.Screens.OnlinePlay.Multiplayer.Match
             {
                 Debug.Assert(applyingSettingsOperation != null);
 
-                ErrorText.Text = text;
+                // see https://github.com/ppy/osu-web/blob/2c97aaeb64fb4ed97c747d8383a35b30f57428c7/app/Models/Multiplayer/PlaylistItem.php#L48.
+                const string not_found_prefix = "beatmaps not found:";
+
+                if (text.StartsWith(not_found_prefix, StringComparison.Ordinal))
+                {
+                    ErrorText.Text = "The selected beatmap is not available online.";
+                    SelectedItem.Value.MarkInvalid();
+                }
+                else
+                {
+                    ErrorText.Text = text;
+                }
+
                 ErrorText.FadeIn(50);
 
                 applyingSettingsOperation.Dispose();