warn before loading incompatible replays

OpenRA.Mods.Common/Widgets/Logic/ReplayUtils.cs

@@ -0,0 +1,55 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using OpenRA.FileFormats;
+
+namespace OpenRA.Mods.Common.Widgets.Logic
+{
+	public static class ReplayUtils
+	{
+		static readonly Action DoNothing = () => { };
+
+		public static bool CheckReplayCompatibility(ReplayMetadata replayMeta, Action onCancel = null)
+		{
+			if (onCancel == null)
+				onCancel = DoNothing;
+
+			var mod = replayMeta.GameInfo.Mod;
+			if (mod == null)
+				return IncompatibleReplayDialog("an unknown mod", mod, onCancel);
+
+			var version = replayMeta.GameInfo.Version;
+			if (version == null)
+				return IncompatibleReplayDialog("an unknown version", version, onCancel);
+
+			var allMods = ModMetadata.AllMods;
+			if (!allMods.ContainsKey(mod))
+				return IncompatibleReplayDialog("an unavailable mod", mod, onCancel);
+			else if (allMods[mod].Version != version)
+				return IncompatibleReplayDialog("an incompatible version", version, onCancel);
+
+			if (replayMeta.GameInfo.MapPreview.Status != MapStatus.Available)
+				return IncompatibleReplayDialog("an unavailable map", replayMeta.GameInfo.MapUid,  onCancel);
+			else
+				return true;
+		}
+
+		static bool IncompatibleReplayDialog(string type, string name, Action onCancel)
+		{
+			var error = "It was recorded with " + type;
+			error += string.IsNullOrEmpty(name) ? "." : ":\n{0}".F(name);
+
+			ConfirmationDialogs.CancelPrompt("Incompatible Replay", error, onCancel);
+
+			return false;
+		}
+	}
+}