Move some stuff from HackyAI to new AIUtils

OpenRA.Mods.Common/AI/AIUtils.cs

@@ -0,0 +1,51 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2018 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.AI
+{
+	public enum BuildingType { Building, Defense, Refinery }
+
+	public class CaptureTarget<TInfoType> where TInfoType : class, ITraitInfoInterface
+	{
+		internal readonly Actor Actor;
+		internal readonly TInfoType Info;
+
+		/// <summary>The order string given to the capturer so they can capture this actor.</summary>
+		/// <example>ExternalCaptureActor</example>
+		internal readonly string OrderString;
+
+		internal CaptureTarget(Actor actor, string orderString)
+		{
+			Actor = actor;
+			Info = actor.Info.TraitInfoOrDefault<TInfoType>();
+			OrderString = orderString;
+		}
+	}
+
+	public static class AIUtils
+	{
+		public static bool IsAreaAvailable<T>(World world, Player player, Map map, int radius, HashSet<string> terrainTypes)
+		{
+			var cells = world.ActorsHavingTrait<T>().Where(a => a.Owner == player);
+
+			// TODO: Properly check building foundation rather than 3x3 area.
+			return cells.Select(a => map.FindTilesInCircle(a.Location, radius)
+				.Count(c => map.Contains(c) && terrainTypes.Contains(map.GetTerrainInfo(c).Type) &&
+					Util.AdjacentCells(world, Target.FromCell(world, c))
+						.All(ac => terrainTypes.Contains(map.GetTerrainInfo(ac).Type))))
+							.Any(availableCells => availableCells > 0);
+		}
+	}
+}