Deploy activities for mods and future AI scripting

OpenRA.Mods.Common/Activities/UndeployForGrantedCondition.cs

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+#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 OpenRA.Activities;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Activities
+{
+	public class UndeployForGrantedCondition : Activity
+	{
+		readonly GrantConditionOnDeploy deploy;
+
+		public UndeployForGrantedCondition(Actor self) : base()
+		{
+			deploy = self.Trait<GrantConditionOnDeploy>();
+		}
+
+		public override Activity Tick(Actor self)
+		{
+			IsInterruptible = false; // must DEPLOY from now.
+			deploy.Undeploy();
+
+			// Wait for deployment
+			if (deploy.DeployState == DeployState.Undeploying)
+				return this;
+
+			return NextActivity;
+		}
+	}
+}