support power impl; incomplete

OpenRa.Game/SupportPower.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.Game.GameRules;
+
+namespace OpenRa.Game
+{
+	class SupportPower
+	{
+		public readonly SupportPowerInfo Info;
+		public readonly Player Owner;
+
+		public SupportPower(SupportPowerInfo info, Player owner)
+		{
+			Info = info;
+			Owner = owner;
+
+			RemainingTime = TotalTime = (int)info.ChargeTime * 60 * 25;
+		}
+
+		public bool IsAvailable { get; private set; }
+		public bool IsDone { get { return RemainingTime == 0; } }
+		public int RemainingTime { get; private set; }
+		public int TotalTime { get; private set; }
+
+		public void Tick()
+		{
+			if (Info.GivenAuto)
+			{
+				var buildings = Rules.TechTree.GatherBuildings(Owner);
+				var effectivePrereq = Info.Prerequisite
+					.Select( a => a.ToLowerInvariant() )
+					.Where( a => Rules.UnitInfo[a].Owner
+						.Any( r => r == Owner.Race ));
+
+				IsAvailable = Info.TechLevel > -1 
+					&& effectivePrereq.Any()
+					&& effectivePrereq.All(a => buildings[a].Count > 0);
+			}
+
+			if (IsAvailable && (!Info.Powered || Owner.GetPowerState() == PowerState.Normal))
+			{
+				if (RemainingTime > 0) --RemainingTime;
+			}
+		}
+	}
+}