first commit

NitroxServer/Communication/Packets/Processors/BuildingResyncRequestProcessor.cs

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+using System.Collections.Generic;
+using NitroxModel.DataStructures.GameLogic;
+using NitroxModel.DataStructures.GameLogic.Entities;
+using NitroxModel.DataStructures.GameLogic.Entities.Bases;
+using NitroxModel.Packets;
+using NitroxServer.Communication.Packets.Processors.Abstract;
+using NitroxServer.GameLogic.Entities;
+
+namespace NitroxServer.Communication.Packets.Processors;
+
+public class BuildingResyncRequestProcessor : AuthenticatedPacketProcessor<BuildingResyncRequest>
+{
+    private readonly EntityRegistry entityRegistry;
+    private readonly WorldEntityManager worldEntityManager;
+
+    public BuildingResyncRequestProcessor(EntityRegistry entityRegistry, WorldEntityManager worldEntityManager)
+    {
+        this.entityRegistry = entityRegistry;
+        this.worldEntityManager = worldEntityManager;
+    }
+
+    public override void Process(BuildingResyncRequest packet, Player player)
+    {
+        Dictionary<BuildEntity, int> buildEntities = new();
+        Dictionary<ModuleEntity, int> moduleEntities = new();
+        void AddEntityToResync(Entity entity)
+        {
+            switch (entity)
+            {
+                case BuildEntity buildEntity:
+                    buildEntities.Add(buildEntity, buildEntity.OperationId);
+                    break;
+                case ModuleEntity moduleEntity:
+                    moduleEntities.Add(moduleEntity, -1);
+                    break;
+            }
+        }
+
+        if (packet.ResyncEverything)
+        {
+            foreach (GlobalRootEntity globalRootEntity in worldEntityManager.GetGlobalRootEntities(true))
+            {
+                AddEntityToResync(globalRootEntity);
+            }
+        }
+        else if (packet.EntityId != null && entityRegistry.TryGetEntityById(packet.EntityId, out Entity entity))
+        {
+            AddEntityToResync(entity);
+        }
+
+        player.SendPacket(new BuildingResync(buildEntities, moduleEntities));
+    }
+}