Add support for playing an InsufficientFunds warning

OpenRA.Mods.Common/Traits/Player/ProductionQueue.cs

@@ -415,8 +415,12 @@ namespace OpenRA.Mods.Common.Traits
 		public bool Started { get; private set; }
 		public int Slowdown { get; private set; }
 
+		readonly INotifyInsufficientFunds[] insufficientFunds;
+		readonly Player owner;
 		readonly PowerManager pm;
 
+		bool insufficientFundsPlayed;
+
 		public ProductionItem(ProductionQueue queue, string item, int cost, PowerManager pm, Action onComplete)
 		{
 			Item = item;
@@ -425,6 +429,8 @@ namespace OpenRA.Mods.Common.Traits
 			OnComplete = onComplete;
 			Queue = queue;
 			this.pm = pm;
+			owner = queue.Actor.Owner;
+			insufficientFunds = owner.PlayerActor.TraitsImplementing<INotifyInsufficientFunds>().ToArray();
 		}
 
 		public void Tick(PlayerResources pr)
@@ -435,6 +441,13 @@ namespace OpenRA.Mods.Common.Traits
 				if (time > 0)
 					RemainingTime = TotalTime = time;
 
+				// Don't play a QueuedAudio notification when we can't start building (because we don't have the money to)
+				// Also don't play it when the time to build is actually 0 (i.e. normally dev cheats)
+				// to prevent overlapping with the ReadyAudio notification
+				var initialCost = RemainingCost / RemainingTime;
+				if (time != 0 && initialCost != 0 && pr.Cash + pr.Resources > initialCost)
+					Game.Sound.PlayNotification(owner.World.Map.Rules, owner, "Speech", Queue.Info.QueuedAudio, owner.Faction.InternalName);
+
 				Started = true;
 			}
 
@@ -459,7 +472,22 @@ namespace OpenRA.Mods.Common.Traits
 
 			var costThisFrame = RemainingCost / RemainingTime;
 			if (costThisFrame != 0 && !pr.TakeCash(costThisFrame))
+			{
+				if (!insufficientFundsPlayed)
+				{
+					insufficientFundsPlayed = true;
+					foreach (var funds in insufficientFunds)
+						funds.InsufficientFunds(owner.PlayerActor);
+				}
+
 				return;
+			}
+
+			if (insufficientFundsPlayed)
+				insufficientFundsPlayed = false;
+
+			foreach (var funds in insufficientFunds)
+				funds.SufficientFunds(owner.PlayerActor);
 
 			RemainingCost -= costThisFrame;
 			RemainingTime -= 1;