- Finished most of LuaCsSetup top-level functionality.

- Removed some unneeded interface definitions.
- Clean-slated some Services that need to be re-written.

Barotrauma/BarotraumaServer/ServerSource/GameMain.cs

@@ -13,6 +13,7 @@ using System.Xml.Linq;
 using MoonSharp.Interpreter;
 using System.Net;
 using Barotrauma.Extensions;
+using Barotrauma.LuaCs.Events;
 
 namespace Barotrauma
 {
@@ -34,7 +35,8 @@ namespace Barotrauma
             set { world = value; }
         }
 
-        public static LuaCsSetup LuaCs;
+        private static LuaCsSetup _luaCs;
+        public static LuaCsSetup LuaCs => _luaCs ??= new LuaCsSetup();
 
         public static GameServer Server;
         public static NetworkMember NetworkMember
@@ -364,7 +366,7 @@ namespace Barotrauma
                     TaskPool.Update();
                     CoroutineManager.Update(paused: false, (float)Timing.Step);
 
-                    GameMain.LuaCs.Update();
+                    LuaCs.EventService.PublishEvent<IEventUpdate>(sub => sub.OnUpdate(Timing.Step));
                     performanceCounterTimer.Stop();
                     if (GameMain.LuaCs.PerformanceCounter.EnablePerformanceCounter)
                     {

Barotrauma/BarotraumaServer/ServerSource/LuaCs/LuaCsSetup.cs

@@ -0,0 +1,22 @@
+using Barotrauma.Networking;
+
+namespace Barotrauma;
+
+partial class LuaCsSetup
+{
+    /// <summary>
+    /// Handles changes in game states tracked by screen changes.
+    /// </summary>
+    /// <param name="screen">The new game screen.</param>
+    public partial void OnScreenSelected(Screen screen)
+    {
+        // the server is always in the running state unless explicitly stopped.
+        if (screen == UnimplementedScreen.Instance)
+            SetRunState(RunState.Unloaded);
+        SetRunState(RunState.Running);
+    }
+
+    private partial bool ShouldRunCs() => IsCsEnabled.Value || 
+                                          (GetPackage(new SteamWorkshopId(CsForBarotraumaSteamId.Value), false, false) is { } 
+                                          && GameMain.Server.ServerPeer is LidgrenServerPeer);
+}

Barotrauma/BarotraumaServer/ServerSource/LuaCs/Services/PackageService.cs

@@ -1,29 +0,0 @@
-using System;
-using System.Diagnostics.CodeAnalysis;
-using Barotrauma.LuaCs.Services.Processing;
-
-// ReSharper disable once CheckNamespace
-namespace Barotrauma.LuaCs.Services;
-
-public partial class PackageService
-{
-    public PackageService(
-        Lazy<IModConfigCreatorService> configParserService,
-        Lazy<ILuaScriptService> luaScriptService,
-        Lazy<ILocalizationService> localizationService,
-        Lazy<IPluginService> pluginService,
-        Lazy<IConfigService> configService,
-        IPackageManagementService packageManagementService,
-        IStorageService storageService,
-        ILoggerService loggerService)
-    {
-        _configParserService = configParserService;
-        _luaScriptService = luaScriptService;
-        _localizationService = localizationService;
-        _pluginService = pluginService;
-        _configService = configService;
-        _packageManagementService = packageManagementService;
-        _storageService = storageService;
-        _loggerService = loggerService;
-    }
-}