allow to lay single mines similiar to the original

closes #5467

OpenRA.Mods.RA/Minelayer.cs

@@ -13,6 +13,7 @@ using System.Collections.Generic;
 using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Mods.RA.Activities;
+using OpenRA.Mods.RA.Orders;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
@@ -45,17 +46,26 @@ namespace OpenRA.Mods.RA
 
 		public IEnumerable<IOrderTargeter> Orders
 		{
-			get { yield return new BeginMinefieldOrderTargeter(); }
+			get
+			{
+				yield return new BeginMinefieldOrderTargeter();
+				yield return new DeployOrderTargeter("PlaceMine", 5);
+			}
 		}
 
 		public Order IssueOrder(Actor self, IOrderTargeter order, Target target, bool queued)
 		{
-			if (!(order is BeginMinefieldOrderTargeter))
-				return null;
-
-			var start = target.CenterPosition.ToCPos();
-			self.World.OrderGenerator = new MinefieldOrderGenerator(self, start);
-			return new Order("BeginMinefield", self, false) { TargetLocation = start };
+			switch (order.OrderID)
+			{
+				case "BeginMinefield":
+					var start = target.CenterPosition.ToCPos();
+					self.World.OrderGenerator = new MinefieldOrderGenerator(self, start);
+					return new Order("BeginMinefield", self, false) { TargetLocation = start };
+				case "PlaceMine":
+					return new Order("PlaceMine", self, false) { TargetLocation = self.Location };
+				default:
+					return null;
+			}
 		}
 
 		public void ResolveOrder(Actor self, Order order)
@@ -63,6 +73,14 @@ namespace OpenRA.Mods.RA
 			if (order.OrderString == "BeginMinefield")
 				minefieldStart = order.TargetLocation;
 
+			if (order.OrderString == "PlaceMine")
+			{
+				minefieldStart = order.TargetLocation;
+				Minefield = new CPos[] { order.TargetLocation };
+				self.CancelActivity();
+				self.QueueActivity(new LayMines());
+			}
+
 			if (order.OrderString == "PlaceMinefield")
 			{
 				var movement = self.Trait<IPositionable>();