From acacd99a7174d93d19bc8a5973a88896c1cb6a98 Mon Sep 17 00:00:00 2001
From: Chris Forbes <chrisf@ijw.co.nz>
Date: Sat, 2 Jan 2010 12:00:37 +1300
Subject: [PATCH] backend support for selling

---
 OpenRa.Game/OpenRa.Game.csproj        |  1 +
 OpenRa.Game/Traits/Activities/Sell.cs | 41 +++++++++++++++++++++++++++
 OpenRa.Game/Traits/RenderBuilding.cs  |  6 ++++
 3 files changed, 48 insertions(+)
 create mode 100644 OpenRa.Game/Traits/Activities/Sell.cs

diff --git a/OpenRa.Game/OpenRa.Game.csproj b/OpenRa.Game/OpenRa.Game.csproj
index 0f4e25dde5..185d03cc18 100644
--- a/OpenRa.Game/OpenRa.Game.csproj
+++ b/OpenRa.Game/OpenRa.Game.csproj
@@ -146,6 +146,7 @@
     <Compile Include="Traits\Activities\Rearm.cs" />
     <Compile Include="Traits\Activities\Repair.cs" />
     <Compile Include="Traits\Activities\ReturnToBase.cs" />
+    <Compile Include="Traits\Activities\Sell.cs" />
     <Compile Include="Traits\Activities\Teleport.cs" />
     <Compile Include="BuildingInfluenceMap.cs" />
     <Compile Include="IOrderGenerator.cs" />
diff --git a/OpenRa.Game/Traits/Activities/Sell.cs b/OpenRa.Game/Traits/Activities/Sell.cs
new file mode 100644
index 0000000000..d0dac1d145
--- /dev/null
+++ b/OpenRa.Game/Traits/Activities/Sell.cs
@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits.Activities
+{
+	class Sell : IActivity
+	{
+		public IActivity NextActivity { get; set; }
+
+		bool started;
+
+		void DoSell(Actor self)
+		{
+			var refund = Rules.General.RefundPercent 
+				* self.Health * self.Info.Cost / self.Info.Strength;
+
+			self.Owner.GiveCash((int)refund);
+			self.Health = 0;
+			Game.world.Remove(self);
+		}
+
+		public IActivity Tick(Actor self)
+		{
+			if (!started)
+			{
+				var rb = self.traits.Get<RenderBuilding>();
+				rb.PlayCustomAnimBackwards(self, "make",
+					() => Game.world.AddFrameEndTask(w => DoSell(self)));
+
+				Sound.Play("cashturn.aud");
+				started = true;
+			}
+
+			return this;
+		}
+
+		public void Cancel(Actor self) { /* never gonna give you up.. */ }
+	}
+}
diff --git a/OpenRa.Game/Traits/RenderBuilding.cs b/OpenRa.Game/Traits/RenderBuilding.cs
index 2dd81f7266..24830e0a67 100644
--- a/OpenRa.Game/Traits/RenderBuilding.cs
+++ b/OpenRa.Game/Traits/RenderBuilding.cs
@@ -62,6 +62,12 @@ namespace OpenRa.Game.Traits
 				() => anim.PlayRepeating(GetPrefix(self) + "idle"));
 		}
 
+		public void PlayCustomAnimBackwards(Actor self, string name, Action a)
+		{
+			anim.PlayBackwardsThen(GetPrefix(self) + name,
+				() => { anim.PlayRepeating(GetPrefix(self) + "idle"); a(); });
+		}
+
 		public virtual void Damaged(Actor self, AttackInfo e)
 		{
 			if (!e.DamageStateChanged)