Powernet Recalculation simplification (#1427)

Co-authored-by: py01 <pyronetics01@gmail.com>

Content.Server/GameObjects/Components/Power/PowerNetComponents/IPowerNetManager.cs

@@ -0,0 +1,38 @@
+using Content.Server.GameObjects.Components.NodeContainer.NodeGroups;
+using System.Collections.Generic;
+
+namespace Content.Server.GameObjects.Components.Power.PowerNetComponents
+{
+    /// <summary>
+    ///     Maintains a set of <see cref="IPowerNet"/>s that need to be updated with <see cref="IPowerNet.UpdateConsumerReceivedPower"/>.
+    ///     Defers updating to reduce recalculations when a group is altered multiple times in a frame.
+    /// </summary>
+    public interface IPowerNetManager
+    {
+        /// <summary>
+        ///     Queue up an <see cref="IPowerNet"/> to be updated.
+        /// </summary>
+        void AddDirtyPowerNet(IPowerNet powerNet);
+
+        void Update(float frameTime);
+    }
+
+    public class PowerNetManager : IPowerNetManager
+    {
+        private readonly HashSet<IPowerNet> _dirtyPowerNets = new HashSet<IPowerNet>();
+
+        public void AddDirtyPowerNet(IPowerNet powerNet)
+        {
+            _dirtyPowerNets.Add(powerNet);
+        }
+
+        public void Update(float frameTime)
+        {
+            foreach (var powerNet in _dirtyPowerNets)
+            {
+                powerNet.UpdateConsumerReceivedPower();
+            }
+            _dirtyPowerNets.Clear();
+        }
+    }
+}