Move SupportPowerDecisions to a single parent node.

This is required before we can force all trait
properties to match a TraitInfo-defined field.

OpenRA.Mods.Common/UpdateRules/Rules/MoveHackyAISupportPowerDecisions.cs

@@ -0,0 +1,56 @@
+#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;
+
+namespace OpenRA.Mods.Common.UpdateRules.Rules
+{
+	public class MoveHackyAISupportPowerDecisions : UpdateRule
+	{
+		public override string Name { get { return "Move HackyAI SupportPowerDecisions to a trait property"; } }
+		public override string Description
+		{
+			get
+			{
+				return "The SupportPowerDefinitions on HackyAI are moved from top-level trait properties\n" +
+					"to children of a single SupportPowerDecisions property.";
+			}
+		}
+
+		public override IEnumerable<string> UpdateActorNode(ModData modData, MiniYamlNode actorNode)
+		{
+			foreach (var hackyAINode in actorNode.ChildrenMatching("HackyAI"))
+			{
+				var children = hackyAINode.ChildrenMatching("SupportPowerDecision");
+				if (!children.Any())
+					continue;
+
+				var parent = hackyAINode.LastChildMatching("SupportPowerDecisions");
+				if (parent == null)
+				{
+					parent = new MiniYamlNode("SupportPowerDecisions", "");
+					hackyAINode.AddNode(parent);
+				}
+
+				foreach (var child in children.ToList())
+				{
+					var split = child.Key.Split('@');
+					child.Key = split.Length > 1 ? split[1] : "Default";
+					parent.AddNode(child);
+					hackyAINode.RemoveNode(child);
+				}
+			}
+
+			yield break;
+		}
+	}
+}