Agent code and restructuring

Services/Immortal/BuildOrderService.cs

@@ -282,7 +282,8 @@ public class BuildOrderService : IBuildOrderService
     {
         return (from ordersAtTime in _buildOrder.StartedOrders
             from orders in ordersAtTime.Value
-            where ordersAtTime.Key + (orders.Production() == null ? 0 : orders.Production().BuildTime) <= interval
+            let production = orders.Production()
+            where ordersAtTime.Key + (production?.BuildTime ?? 0) <= interval
             select orders).ToList();
     }
 
@@ -290,15 +291,14 @@ public class BuildOrderService : IBuildOrderService
     {
         return (from ordersAtTime in _buildOrder.StartedOrders
             from orders in ordersAtTime.Value
-            where orders.Harvest() != null
-            where ordersAtTime.Key + (orders.Production() == null
-                      ? 0
-                      : orders.Production().BuildTime) <= interval
-                  && !orders.Harvest().IsDepleted(
+            let production = orders.Production()
+            let harvest = orders.Harvest()
+            where harvest != null
+            let buildTime = production?.BuildTime ?? 0
+            where ordersAtTime.Key + buildTime <= interval
+                  && !harvest.IsDepleted(
                       interval,
-                      ordersAtTime.Key + (orders.Production() == null
-                          ? 0
-                          : orders.Production().BuildTime))
+                      ordersAtTime.Key + buildTime)
             select orders).ToList();
     }