Refactor Traits.fake into a Tags interface for primary production structures +mods

OpenRa.Game/Traits/Fake.cs

@@ -1,14 +1,16 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 
 namespace OpenRa.Game.Traits
 {
-	class Fake
+	class Fake : ITags
 	{
-	
-	public Fake(Actor self){}
-	
+		public Fake(Actor self){}
+		
+		public IEnumerable<TagType> GetTags()
+		{
+			yield return TagType.Fake;
+		}
 	}
 }

OpenRa.Game/Traits/Production.cs

@@ -1,9 +1,10 @@
 using OpenRa.Game.GameRules;
 using System.Linq;
+using System.Collections.Generic;
 
 namespace OpenRa.Game.Traits
 {
-	class Production : IProducer
+	class Production : IProducer, ITags
 	{
 		public Production( Actor self ) { }
 
@@ -50,6 +51,11 @@ namespace OpenRa.Game.Traits
 
 			return true;
 		}
+
+		public IEnumerable<TagType> GetTags()
+		{
+			yield return (true) ? TagType.Primary : TagType.None;
+		}
 	}
 
 	class ProductionSurround : Production

OpenRa.Game/Traits/TraitsInterfaces.cs

@@ -6,7 +6,10 @@ using System.Drawing;
 namespace OpenRa.Game.Traits
 {
 	enum DamageState { Normal, Half, Dead };
+	
+	// depends on the order of pips in WorldRenderer.cs!
 	enum PipType { Transparent, Green, Yellow, Red, Gray };
+	enum TagType { None, Fake, Primary };
 	
 	interface ITick { void Tick(Actor self); }
 	interface IRender { IEnumerable<Tuple<Sprite, float2, int>> Render(Actor self); }
@@ -25,4 +28,5 @@ namespace OpenRa.Game.Traits
 	interface IDamageModifier { float GetDamageModifier(); }
 	interface ISpeedModifier { float GetSpeedModifier(); }
 	interface IPips { IEnumerable<PipType> GetPips(); }
+	interface ITags { IEnumerable<TagType> GetTags(); }
 }