generalize into SpawnActorPower

closes #5724

OpenRA.Mods.RA/SupportPowers/SpawnActorPower.cs

@@ -0,0 +1,67 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 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. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using OpenRA.Effects;
+using OpenRA.Mods.RA.Activities;
+using OpenRA.Mods.RA.Effects;
+using OpenRA.Primitives;
+
+namespace OpenRA.Mods.RA
+{
+	[Desc("Spawns an actor that stays for a limited amount of time.")]
+	public class SpawnActorPowerInfo : SupportPowerInfo
+	{
+		[Desc("Actor to spawn.")]
+		public readonly string Actor = null;
+
+		[Desc("Amount of time to keep the actor alive in ticks.")]
+		public readonly int LifeTime = 250;
+
+		public readonly string DeploySound = null;
+
+		public readonly string EffectSequence = null;
+		public readonly string EffectPalette = null;
+
+		public override object Create(ActorInitializer init) { return new SpawnActorPower(init.self, this); }
+	}
+
+	public class SpawnActorPower : SupportPower
+	{
+		public SpawnActorPower(Actor self, SpawnActorPowerInfo info) : base(self, info) { }
+		public override void Activate(Actor self, Order order, SupportPowerManager manager)
+		{
+			base.Activate(self, order, manager);
+
+			var info = Info as SpawnActorPowerInfo;
+
+			if (info.Actor != null)
+			{
+				self.World.AddFrameEndTask(w =>
+				{
+					var location = self.World.Map.CenterOfCell(order.TargetLocation);
+
+					Sound.Play(info.DeploySound, location);
+
+					if (!string.IsNullOrEmpty(info.EffectSequence) && !string.IsNullOrEmpty(info.EffectPalette))
+						w.Add(new SpriteEffect(location, w, info.EffectSequence, info.EffectPalette));
+
+					var actor = w.CreateActor(info.Actor, new TypeDictionary
+					{
+						new LocationInit(order.TargetLocation),
+						new OwnerInit(self.Owner),
+					});
+
+					actor.QueueActivity(new Wait(info.LifeTime));
+					actor.QueueActivity(new RemoveSelf());
+				});
+			}
+		}
+	}
+}