Added lua IsCloaked actor property

OpenRA.Mods.Common/Scripting/Properties/CloakProperties.cs

@@ -0,0 +1,39 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2020 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.Linq;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Scripting;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Scripting
+{
+	[ScriptPropertyGroup("Cloak")]
+	public class CloakProperties : ScriptActorProperties, Requires<CloakInfo>
+	{
+		readonly Cloak[] cloaks;
+
+		public CloakProperties(ScriptContext context, Actor self)
+			: base(context, self)
+		{
+			cloaks = self.TraitsImplementing<Cloak>().ToArray();
+		}
+
+		[Desc("Returns true if the actor is cloaked.")]
+		public bool IsCloaked
+		{
+			get
+			{
+				return cloaks.Any(c => c.Cloaked);
+			}
+		}
+	}
+}