Add GrantConditionOnBotOwner trait.

OpenRA.Mods.Common/Traits/Conditions/GrantConditionOnBotOwner.cs

@@ -0,0 +1,64 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2017 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.Traits
+{
+	[Desc("Grants a condition to this actor when it is owned by an AI bot.")]
+	public class GrantConditionOnBotOwnerInfo : ITraitInfo
+	{
+		[FieldLoader.Require]
+		[GrantedConditionReference]
+		[Desc("Condition to grant.")]
+		public readonly string Condition = null;
+
+		[FieldLoader.Require]
+		[Desc("Bot types that trigger the condition.")]
+		public readonly string[] Bots = { };
+
+		public object Create(ActorInitializer init) { return new GrantConditionOnBotOwner(init, this); }
+	}
+
+	public class GrantConditionOnBotOwner : INotifyCreated, INotifyOwnerChanged
+	{
+		readonly GrantConditionOnBotOwnerInfo info;
+
+		ConditionManager conditionManager;
+		int conditionToken = ConditionManager.InvalidConditionToken;
+
+		public GrantConditionOnBotOwner(ActorInitializer init, GrantConditionOnBotOwnerInfo info)
+		{
+			this.info = info;
+		}
+
+		void INotifyCreated.Created(Actor self)
+		{
+			conditionManager = self.TraitOrDefault<ConditionManager>();
+			if (conditionManager != null && self.Owner.IsBot && info.Bots.Contains(self.Owner.BotType))
+				conditionToken = conditionManager.GrantCondition(self, info.Condition);
+		}
+
+		void INotifyOwnerChanged.OnOwnerChanged(Actor self, Player oldOwner, Player newOwner)
+		{
+			if (conditionManager == null)
+				return;
+
+			if (conditionToken != ConditionManager.InvalidConditionToken)
+				conditionToken = conditionManager.RevokeCondition(self, conditionToken);
+
+			if (info.Bots.Contains(newOwner.BotType))
+				conditionToken = conditionManager.GrantCondition(self, info.Condition);
+		}
+	}
+}