Added machine and environment data and new engine manager

TechbloxModdingAPI/App/Client.cs

@@ -1,171 +0,0 @@
-using System;
-using System.Reflection;
-using HarmonyLib;
-
-using RobocraftX.Services;
-using UnityEngine;
-using RobocraftX.Common;
-using TechbloxModdingAPI.Utility;
-
-namespace TechbloxModdingAPI.App
-{
-    /// <summary>
-    /// The Techblox application that is running this code right now.
-    /// </summary>
-    public class Client
-    {
-	    public static Client Instance { get; } = new Client();
-	    
-	    protected static Func<object> ErrorHandlerInstanceGetter;
-
-		protected static Action<object, Error> EnqueueError;
-
-		/// <summary>
-        /// An event that fires whenever the main menu is loaded.
-        /// </summary>
-		public static event EventHandler<MenuEventArgs> EnterMenu
-        {
-	        add => Game.menuEngine.EnterMenu += value;
-			remove => Game.menuEngine.EnterMenu -= value;
-		}
-
-        /// <summary>
-        /// An event that fire whenever the main menu is exited.
-        /// </summary>
-		public static event EventHandler<MenuEventArgs> ExitMenu
-        {
-	        add => Game.menuEngine.ExitMenu += value;
-            remove => Game.menuEngine.ExitMenu -= value;
-        }
-        
-        /// <summary>
-        /// Techblox build version string.
-		/// Usually this is in the form YYYY.mm.DD.HH.MM.SS
-        /// </summary>
-        /// <value>The version.</value>
-		public string Version
-		{
-			get => Application.version;
-		}
-
-        /// <summary>
-        /// Unity version string.
-        /// </summary>
-        /// <value>The unity version.</value>
-        public string UnityVersion
-		{
-			get => Application.unityVersion;
-		}
-
-        /// <summary>
-        /// Game saves currently visible in the menu.
-		/// These take a second to completely populate after the EnterMenu event fires.
-        /// </summary>
-        /// <value>My games.</value>
-		public Game[] MyGames
-		{
-			get 
-			{
-				if (!Game.menuEngine.IsInMenu) return Array.Empty<Game>();
-				return Game.menuEngine.GetMyGames();
-			}
-		}
-
-        /// <summary>
-        /// Whether Techblox is in the Main Menu
-        /// </summary>
-        /// <value><c>true</c> if in menu; <c>false</c> when loading or in a game.</value>
-        public bool InMenu
-		{
-			get => Game.menuEngine.IsInMenu;
-		}
-
-        /// <summary>
-        /// Open a popup which prompts the user to click a button.
-        /// This reuses Techblox's error dialog popup
-        /// </summary>
-        /// <param name="popup">The popup to display. Use an instance of SingleChoicePrompt or DualChoicePrompt.</param>
-        public void PromptUser(Error popup)
-        {
-	        // if the stuff wasn't mostly set to internal, this would be written as:
-	        // RobocraftX.Services.ErrorHandler.Instance.EqueueError(error);
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        EnqueueError(errorHandlerInstance, popup);
-        }
-
-        public void CloseCurrentPrompt()
-        {
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        var popup = GetPopupCloseMethods(errorHandlerInstance);
-	        popup.Close();
-        }
-
-        public void SelectFirstPromptButton()
-        {
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        var popup = GetPopupCloseMethods(errorHandlerInstance);
-	        popup.FirstButton();
-        }
-
-        public void SelectSecondPromptButton()
-        {
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        var popup = GetPopupCloseMethods(errorHandlerInstance);
-	        popup.SecondButton();
-        }
-
-        internal static void Init()
-		{
-			// this would have been so much simpler if this didn't involve a bunch of internal fields & classes
-			Type errorHandler = AccessTools.TypeByName("RobocraftX.Services.ErrorHandler");
-			Type errorHandle = AccessTools.TypeByName("RobocraftX.Services.ErrorHandle");
-			ErrorHandlerInstanceGetter = (Func<object>) AccessTools.Method("TechbloxModdingAPI.App.Client:GenInstanceGetter")
-				.MakeGenericMethod(errorHandler)
-				.Invoke(null, new object[0]);
-			EnqueueError = (Action<object, Error>) AccessTools.Method("TechbloxModdingAPI.App.Client:GenEnqueueError")
-				.MakeGenericMethod(errorHandler, errorHandle)
-				.Invoke(null, new object[0]);
-		}
-
-        // Creating delegates once is faster than reflection every time
-        // Admittedly, this way is more difficult to code and less readable
-        private static Func<object> GenInstanceGetter<T>()
-        {
-	        Type errorHandler = AccessTools.TypeByName("RobocraftX.Services.ErrorHandler");
-	        MethodInfo instance = AccessTools.PropertyGetter(errorHandler, "Instance");
-	        Func<T> getterSimple = (Func<T>) Delegate.CreateDelegate(typeof(Func<T>), null, instance);
-	        Func<object> getterCasted = () => getterSimple();
-	        return getterCasted;
-        }
-
-        private static Action<object, Error> GenEnqueueError<T, TRes>()
-        {
-	        Type errorHandler = AccessTools.TypeByName("RobocraftX.Services.ErrorHandler");
-	        MethodInfo enqueueError = AccessTools.Method(errorHandler, "EnqueueError");
-	        Func<T, Error, TRes> enqueueSimple =
-		        (Func<T, Error, TRes>) Delegate.CreateDelegate(typeof(Func<T, Error, TRes>), enqueueError);
-	        Action<object, Error> enqueueCasted =
-		        (object instance, Error error) => { enqueueSimple((T) instance, error); };
-	        return enqueueCasted;
-        }
-
-        private static (Action Close, Action FirstButton, Action SecondButton) _errorPopup;
-
-        private static (Action Close, Action FirstButton, Action SecondButton) GetPopupCloseMethods(object handler)
-        {
-	        if (_errorPopup.Close != null)
-		        return _errorPopup;
-	        Type errorHandler = handler.GetType();
-	        FieldInfo field = AccessTools.Field(errorHandler, "errorPopup");
-	        var errorPopup = (ErrorPopup)field.GetValue(handler);
-	        MethodInfo info = AccessTools.Method(errorPopup.GetType(), "ClosePopup");
-	        var close = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
-	        info = AccessTools.Method(errorPopup.GetType(), "HandleFirstOption");
-	        var first = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
-	        info = AccessTools.Method(errorPopup.GetType(), "HandleSecondOption");
-	        var second = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
-	        _errorPopup = (close, first, second);
-	        return _errorPopup;
-        }
-    }
-}

TechbloxModdingAPI/App/Game.cs

@@ -20,12 +20,12 @@ namespace TechbloxModdingAPI.App
     public class Game
     {
         // extensible engines
-		protected static GameGameEngine gameEngine = new GameGameEngine();
-		protected internal static GameMenuEngine menuEngine = new GameMenuEngine();
-		protected static DebugInterfaceEngine debugOverlayEngine = new DebugInterfaceEngine();
-		protected static GameBuildSimEventEngine buildSimEventEngine = new GameBuildSimEventEngine();
+		protected static GameGameEngine gameEngine = new();
+		protected internal static GameMenuEngine menuEngine = new();
+		protected static DebugInterfaceEngine debugOverlayEngine = new();
+		protected static GameBuildSimEventEngine buildSimEventEngine = new();
 
-        private List<string> debugIds = new List<string>();
+        private List<string> debugIds = new();
 
 		private bool menuMode = true;
 		private bool hasId = false;

TechbloxModdingAPI/App/GameBuildSimEventEngine.cs

@@ -1,10 +1,7 @@
-using System;
-
-using RobocraftX.Common;
-using RobocraftX.StateSync;
+using RobocraftX.StateSync;
 using Svelto.ECS;
+using TechbloxModdingAPI.Common;
 using Unity.Jobs;
-using TechbloxModdingAPI.Engines;
 using TechbloxModdingAPI.Utility;
 
 namespace TechbloxModdingAPI.App

TechbloxModdingAPI/App/GameGameEngine.cs

@@ -16,7 +16,8 @@ using Techblox.Environment.Transition;
 using Techblox.GameSelection;
 
 using TechbloxModdingAPI.Blocks;
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
+using TechbloxModdingAPI.Common.Engines;
 using TechbloxModdingAPI.Input;
 using TechbloxModdingAPI.Players;
 using TechbloxModdingAPI.Utility;

TechbloxModdingAPI/App/GameMenuEngine.cs

@@ -9,8 +9,7 @@ using RobocraftX.Multiplayer;
 using Svelto.ECS;
 using Svelto.ECS.Experimental;
 using Techblox.GameSelection;
-
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common.Engines;
 using TechbloxModdingAPI.Utility;
 
 namespace TechbloxModdingAPI.App

TechbloxModdingAPI/Block.cs

@@ -25,16 +25,16 @@ namespace TechbloxModdingAPI
 	/// </summary>
 	public class Block : EcsObjectBase, IEquatable<Block>, IEquatable<EGID>
 	{
-		protected static readonly PlacementEngine PlacementEngine = new PlacementEngine();
-		protected static readonly MovementEngine MovementEngine = new MovementEngine();
-		protected static readonly RotationEngine RotationEngine = new RotationEngine();
-		protected static readonly RemovalEngine RemovalEngine = new RemovalEngine();
-		protected static readonly SignalEngine SignalEngine = new SignalEngine();
-		protected static readonly BlockEventsEngine BlockEventsEngine = new BlockEventsEngine();
-		protected static readonly ScalingEngine ScalingEngine = new ScalingEngine();
-		protected static readonly BlockCloneEngine BlockCloneEngine = new BlockCloneEngine();
+		protected static readonly PlacementEngine PlacementEngine = new();
+		protected static readonly MovementEngine MovementEngine = new();
+		protected static readonly RotationEngine RotationEngine = new();
+		protected static readonly RemovalEngine RemovalEngine = new();
+		protected static readonly SignalEngine SignalEngine = new();
+		protected static readonly BlockEventsEngine BlockEventsEngine = new();
+		protected static readonly ScalingEngine ScalingEngine = new();
+		protected static readonly BlockCloneEngine BlockCloneEngine = new();
 
-		protected internal static readonly BlockEngine BlockEngine = new BlockEngine();
+		protected internal static readonly BlockEngine BlockEngine = new();
 
 		/// <summary>
 		/// Place a new block at the given position. If scaled, position means the center of the block. The default block size is 0.2 in terms of position.
@@ -96,7 +96,7 @@ namespace TechbloxModdingAPI
 		}
 
 		private static readonly Dictionary<ExclusiveBuildGroup, (Func<EGID, Block> Constructor, Type Type)> GroupToConstructor =
-			new Dictionary<ExclusiveBuildGroup, (Func<EGID, Block>, Type)>
+			new()
 			{
 				{CommonExclusiveGroups.DAMPEDSPRING_BLOCK_GROUP, (id => new DampedSpring(id), typeof(DampedSpring))},
 				{CommonExclusiveGroups.ENGINE_BLOCK_BUILD_GROUP, (id => new Engine(id), typeof(Engine))},
@@ -122,9 +122,9 @@ namespace TechbloxModdingAPI
 		internal static Block New(EGID egid, bool signaling = false)
 		{
 			if (egid == default) return null;
-			if (GroupToConstructor.ContainsKey(egid.groupID))
+			if (GroupToConstructor.TryGetValue(egid.groupID, out var value))
 			{
-				var (constructor, type) = GroupToConstructor[egid.groupID];
+				var (constructor, type) = value;
 				return GetInstance(egid, constructor, type);
 			}
 
@@ -133,7 +133,7 @@ namespace TechbloxModdingAPI
 				: GetInstance(egid, e => new Block(e));
 		}
 
-		public Block(EGID id) : base(id)
+		public Block(EGID id) : base(id, typeof(BlockEntityDescriptor))
 		{
 			Type expectedType;
 			if (GroupToConstructor.ContainsKey(id.groupID) &&
@@ -153,26 +153,6 @@ namespace TechbloxModdingAPI
 		{
 		}
 
-		/// <summary>
-		/// Places a new block in the world.
-		/// </summary>
-		/// <param name="type">The block's type</param>
-		/// <param name="position">The block's position (a block is 0.2 wide in terms of position)</param>
-		/// <param name="autoWire">Whether the block should be auto-wired (if functional)</param>
-		/// <param name="player">The player who placed the block</param>
-		public Block(BlockIDs type, float3 position, bool autoWire = false, Player player = null)
-			: base(block =>
-			{
-				if (!PlacementEngine.IsInGame || !GameState.IsBuildMode())
-					throw new BlockException("Blocks can only be placed in build mode.");
-				var initializer = PlacementEngine.PlaceBlock(type, position, player, autoWire);
-				block.InitData = initializer;
-				Placed += ((Block)block).OnPlacedInit;
-				return initializer.EGID;
-			})
-		{
-		}
-
 		private EGID copiedFrom;
 
 		/// <summary>

TechbloxModdingAPI/BlockGroup.cs

@@ -18,14 +18,14 @@ namespace TechbloxModdingAPI
     /// </summary>
     public class BlockGroup : EcsObjectBase, ICollection<Block>, IDisposable
     {
-        internal static BlueprintEngine _engine = new BlueprintEngine();
+        internal static BlueprintEngine _engine = new();
         private readonly Block sourceBlock;
         private readonly List<Block> blocks;
         private float3 position, rotation;
         internal bool PosAndRotCalculated;
 
         internal BlockGroup(int id, Block block) : base(new EGID((uint)id,
-            BlockGroupExclusiveGroups.BlockGroupEntityGroup))
+            BlockGroupExclusiveGroups.BlockGroupEntityGroup), typeof(BlockGroupEntityDescriptor))
         {
             if (id == BlockGroupUtility.GROUP_UNASSIGNED)
                 throw new BlockException("Cannot create a block group for blocks without a group!");

TechbloxModdingAPI/Blocks/Engines/BlockCloneEngine.cs

@@ -8,6 +8,7 @@ using RobocraftX.Character;
 using RobocraftX.Common;
 using Svelto.DataStructures;
 using Svelto.ECS;
+using TechbloxModdingAPI.Common;
 using TechbloxModdingAPI.Engines;
 
 namespace TechbloxModdingAPI.Blocks.Engines

TechbloxModdingAPI/Blocks/Engines/BlockEngine.cs

@@ -17,6 +17,7 @@ using Svelto.ECS.Experimental;
 using Svelto.ECS.Hybrid;
 using Techblox.BuildingDrone;
 using Techblox.ObjectIDBlockServer;
+using TechbloxModdingAPI.Common;
 using Unity.Mathematics;
 
 using TechbloxModdingAPI.Engines;

TechbloxModdingAPI/Blocks/Engines/BlueprintEngine.cs

@@ -19,6 +19,7 @@ using Svelto.ECS.EntityStructs;
 using Svelto.ECS.Native;
 using Svelto.ECS.Serialization;
 using Techblox.Blocks.Connections;
+using TechbloxModdingAPI.Common.Engines;
 using TechbloxModdingAPI.Engines;
 using TechbloxModdingAPI.Utility;
 using TechbloxModdingAPI.Utility.ECS;
@@ -35,7 +36,7 @@ namespace TechbloxModdingAPI.Blocks.Engines
             AccessTools.Method("RobocraftX.CR.MachineEditing.PlaceBlockUtility:GetBlocksSharingBlockgroup");
 
         private NativeDynamicArray selectedBlocksInGroup;
-        private NativeHashSet<ulong> removedConnections = new NativeHashSet<ulong>();
+        private NativeHashSet<ulong> removedConnections = new();
         private int addingToBlockGroup = -1;
 
         private static readonly Type PlaceBlueprintUtilityType =

TechbloxModdingAPI/Blocks/Engines/MovementEngine.cs

@@ -2,10 +2,9 @@
 using RobocraftX.DOTS;
 using Svelto.ECS;
 using Svelto.ECS.EntityStructs;
+using TechbloxModdingAPI.Common;
 using Unity.Mathematics;
 using Unity.Transforms;
-
-using TechbloxModdingAPI.Engines;
 using TechbloxModdingAPI.Utility;
 using TechbloxModdingAPI.Utility.ECS;
 

TechbloxModdingAPI/Blocks/Engines/PlacementEngine.cs

@@ -12,9 +12,8 @@ using RobocraftX.Rendering;
 using RobocraftX.Rendering.GPUI;
 using Svelto.ECS;
 using Svelto.ECS.EntityStructs;
+using TechbloxModdingAPI.Common;
 using Unity.Mathematics;
-
-using TechbloxModdingAPI.Engines;
 using TechbloxModdingAPI.Utility;
 using TechbloxModdingAPI.Utility.ECS;
 

TechbloxModdingAPI/Blocks/Engines/RemovalEngine.cs

@@ -9,6 +9,7 @@ using RobocraftX.StateSync;
 using Svelto.ECS;
 using Svelto.ECS.Native;
 using Techblox.Blocks.Connections;
+using TechbloxModdingAPI.Common;
 using Unity.Collections;
 using Unity.Jobs;
 using Allocator = Unity.Collections.Allocator;

TechbloxModdingAPI/Blocks/Engines/RotationEngine.cs

@@ -2,6 +2,7 @@
 using RobocraftX.DOTS;
 using Svelto.ECS;
 using Svelto.ECS.EntityStructs;
+using TechbloxModdingAPI.Common;
 using Unity.Mathematics;
 using UnityEngine;
 

TechbloxModdingAPI/Blocks/Engines/ScalingEngine.cs

@@ -4,6 +4,7 @@ using HarmonyLib;
 using RobocraftX.Common;
 using RobocraftX.DOTS;
 using Svelto.ECS;
+using TechbloxModdingAPI.Common;
 using Unity.Entities;
 
 using TechbloxModdingAPI.Engines;

TechbloxModdingAPI/Blocks/Engines/SignalEngine.cs

@@ -3,7 +3,8 @@
 using Gamecraft.Wires;
 using Svelto.DataStructures;
 using Svelto.ECS;
-
+using TechbloxModdingAPI.Common;
+using TechbloxModdingAPI.Common.Engines;
 using TechbloxModdingAPI.Engines;
 using TechbloxModdingAPI.Utility;
 using TechbloxModdingAPI.Utility.ECS;
@@ -260,7 +261,7 @@ namespace TechbloxModdingAPI.Blocks.Engines
 			else
 			{
 				BlockPortsStruct ports = entitiesDB.QueryEntity<BlockPortsStruct>(startBlock);
-				startPorts = new EGID[] {new EGID(ports.firstOutputID + startPort, NamedExclusiveGroup<BuildModeWiresGroups.OutputPortsGroup>.Group) };
+				startPorts = new EGID[] {new(ports.firstOutputID + startPort, NamedExclusiveGroup<BuildModeWiresGroups.OutputPortsGroup>.Group) };
 			}
 
 			EGID[] endPorts;
@@ -272,7 +273,7 @@ namespace TechbloxModdingAPI.Blocks.Engines
 			else
 			{
 				BlockPortsStruct ports = entitiesDB.QueryEntity<BlockPortsStruct>(endBlock);
-				endPorts = new EGID[] {new EGID(ports.firstInputID + endPort, NamedExclusiveGroup<BuildModeWiresGroups.InputPortsGroup>.Group) };
+				endPorts = new EGID[] {new(ports.firstInputID + endPort, NamedExclusiveGroup<BuildModeWiresGroups.InputPortsGroup>.Group) };
 			}
 			
 			for (int endIndex = 0; endIndex < endPorts.Length; endIndex++)

TechbloxModdingAPI/Blocks/Wire.cs

@@ -69,45 +69,6 @@ namespace TechbloxModdingAPI.Blocks
                 : null;
         }
 
-        /// <summary>
-        /// Construct a wire object froam n existing connection.
-        /// </summary>
-        /// <param name="start">Starting block ID.</param>
-        /// <param name="end">Ending block ID.</param>
-        /// <param name="startPort">Starting port number, or guess if omitted.</param>
-        /// <param name="endPort">Ending port number, or guess if omitted.</param>
-        /// <exception cref="WireInvalidException">Guessing failed or wire does not exist.</exception>
-        public Wire(Block start, Block end, byte startPort = Byte.MaxValue, byte endPort = Byte.MaxValue) : base(ecs =>
-        {
-            var th = (Wire)ecs;
-            th.startBlockEGID = start.Id;
-            th.endBlockEGID = end.Id;
-            bool flipped = false;
-            // find block ports
-            EGID wire = signalEngine.MatchBlocksToWire(start.Id, end.Id, startPort, endPort);
-            if (wire == default)
-            {
-                // flip I/O around and try again
-                wire = signalEngine.MatchBlocksToWire(end.Id, start.Id, endPort, startPort);
-                flipped = true;
-                // NB: start and end are handled exactly as they're received as params.
-                // This makes wire traversal easier, but makes logic in this class a bit more complex
-            }
-
-            if (wire != default)
-            {
-                th.Construct(start.Id, end.Id, startPort, endPort, wire, flipped);
-            }
-            else
-            {
-                throw new WireInvalidException("Wire not found");
-            }
-
-            return th.wireEGID;
-        })
-        {
-        }
-
         /// <summary>
         /// Construct a wire object from an existing wire connection.
         /// </summary>
@@ -120,9 +81,9 @@ namespace TechbloxModdingAPI.Blocks
         public Wire(Block start, Block end, byte startPort, byte endPort, EGID wire, bool inputToOutput)
             : this(start.Id, end.Id, startPort, endPort, wire, inputToOutput)
         {
-        }
+        } // TODO: Convert all constructors (including the removed one) to static methods
 
-        private Wire(EGID startBlock, EGID endBlock, byte startPort, byte endPort, EGID wire, bool inputToOutput) : base(wire)
+        private Wire(EGID startBlock, EGID endBlock, byte startPort, byte endPort, EGID wire, bool inputToOutput) : base(wire, typeof(WireEntityDescriptor))
         {
             Construct(startBlock, endBlock, startPort, endPort, wire, inputToOutput);
         }
@@ -145,7 +106,7 @@ namespace TechbloxModdingAPI.Blocks
         /// Construct a wire object from an existing wire connection.
         /// </summary>
         /// <param name="wireEgid">The wire ID.</param>
-        public Wire(EGID wireEgid) : base(wireEgid)
+        public Wire(EGID wireEgid) : base(wireEgid, typeof(WireEntityDescriptor))
         {
             WireEntityStruct wire = signalEngine.GetWire(wireEGID);
             Construct(wire.sourceBlockEGID, wire.destinationBlockEGID, wire.sourcePortUsage, wire.destinationPortUsage,
@@ -188,22 +149,6 @@ namespace TechbloxModdingAPI.Blocks
                 signalEngine.GetChannelDataStruct(startPortEGID).Get().valueAsEcsString.Set(value);
             }
         }
-        
-        /// <summary>
-        /// The wire's raw string signal.
-        /// </summary>
-        public ECSString ECSString
-        {
-            get
-            {
-                return signalEngine.GetChannelDataStruct(startPortEGID).Get().valueAsEcsString;
-            }
-
-            set
-            {
-                signalEngine.GetChannelDataStruct(startPortEGID).Get().valueAsEcsString = value;
-            }
-        }
 
         /// <summary>
         /// The wire's signal id.
@@ -292,9 +237,7 @@ namespace TechbloxModdingAPI.Blocks
                 inputToOutput = false;
                 // swap inputs and outputs
                 (endBlockEGID, startBlockEGID) = (startBlockEGID, endBlockEGID);
-                var tempPort = endPortEGID;
-                endPortEGID = startPortEGID;
-                startPortEGID = tempPort;
+                (endPortEGID, startPortEGID) = (startPortEGID, endPortEGID);
                 (endPort, startPort) = (startPort, endPort);
             }
         }

TechbloxModdingAPI/Client/App/Client.cs

@@ -1,127 +0,0 @@
-using System;
-using System.Reflection;
-using HarmonyLib;
-using RobocraftX.Services;
-using TechbloxModdingAPI.App;
-using TechbloxModdingAPI.Client.Game;
-using TechbloxModdingAPI.Common.Utils;
-using UnityEngine;
-
-namespace TechbloxModdingAPI.Client.App;
-
-/// <summary>
-/// Contains information about the game client's current state.
-/// </summary>
-public static class Client
-{ // TODO
-    public static GameState CurrentState { get; }
-	    
-	    private static Func<object> ErrorHandlerInstanceGetter;
-
-		private static Action<object, Error> EnqueueError;
-
-		/// <summary>
-        /// An event that fires whenever the game's state changes
-        /// </summary>
-		public static event EventHandler<MenuEventArgs> StateChanged
-        {
-	        add => Game.menuEngine.EnterMenu += value;
-			remove => Game.menuEngine.EnterMenu -= value;
-		}
-        
-        /// <summary>
-        /// Techblox build version string.
-		/// Usually this is in the form YYYY.mm.DD.HH.MM.SS
-        /// </summary>
-        /// <value>The version.</value>
-		public static string Version => Application.version;
-
-        /// <summary>
-        /// Unity version string.
-        /// </summary>
-        /// <value>The unity version.</value>
-        public static string UnityVersion => Application.unityVersion;
-
-        /// <summary>
-        /// Environments (maps) currently visible in the menu.
-		/// These take a second to completely populate after the EnterMenu event fires.
-        /// </summary>
-        /// <value>Available environments.</value>
-		public static ClientEnvironment[] Environments
-        {
-	        get;
-        }
-
-        /// <summary>
-        /// Open a popup which prompts the user to click a button.
-        /// This reuses Techblox's error dialog popup
-        /// </summary>
-        /// <param name="popup">The popup to display. Use an instance of SingleChoicePrompt or DualChoicePrompt.</param>
-        public static void PromptUser(Error popup)
-        {
-	        // if the stuff wasn't mostly set to internal, this would be written as:
-	        // RobocraftX.Services.ErrorHandler.Instance.EqueueError(error);
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        EnqueueError(errorHandlerInstance, popup);
-        }
-
-        public static void CloseCurrentPrompt()
-        {
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        var popup = GetPopupCloseMethods(errorHandlerInstance);
-	        popup.Close();
-        }
-
-        public static void SelectFirstPromptButton()
-        {
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        var popup = GetPopupCloseMethods(errorHandlerInstance);
-	        popup.FirstButton();
-        }
-
-        public static void SelectSecondPromptButton()
-        {
-	        object errorHandlerInstance = ErrorHandlerInstanceGetter();
-	        var popup = GetPopupCloseMethods(errorHandlerInstance);
-	        popup.SecondButton();
-        }
-
-        internal static void Init()
-        {
-	        var errorHandler = AccessTools.TypeByName("RobocraftX.Services.ErrorHandler");
-	        ErrorHandlerInstanceGetter = GenInstanceGetter(errorHandler);
-	        EnqueueError = GenEnqueueError(errorHandler);
-        }
-
-        // Creating delegates once is faster than reflection every time
-        // Admittedly, this way is more difficult to code and less readable
-        private static Func<object> GenInstanceGetter(Type handler)
-        {
-	        return Reflections.CreateAccessor<Func<object>>("Instance", handler);
-        }
-
-        private static Action<object, Error> GenEnqueueError(Type handler)
-        {
-	        var enqueueError = AccessTools.Method(handler, "EnqueueError");
-	        return Reflections.CreateMethodCall<Action<object, Error>>(enqueueError, handler);
-        }
-
-        private static (Action Close, Action FirstButton, Action SecondButton) _errorPopup;
-
-        private static (Action Close, Action FirstButton, Action SecondButton) GetPopupCloseMethods(object handler)
-        {
-	        if (_errorPopup.Close != null)
-		        return _errorPopup;
-	        Type errorHandler = handler.GetType();
-	        FieldInfo field = AccessTools.Field(errorHandler, "errorPopup");
-	        var errorPopup = (ErrorPopup)field.GetValue(handler);
-	        MethodInfo info = AccessTools.Method(errorPopup.GetType(), "ClosePopup");
-	        var close = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
-	        info = AccessTools.Method(errorPopup.GetType(), "HandleFirstOption");
-	        var first = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
-	        info = AccessTools.Method(errorPopup.GetType(), "HandleSecondOption");
-	        var second = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
-	        _errorPopup = (close, first, second);
-	        return _errorPopup;
-        }
-}

TechbloxModdingAPI/Client/App/ClientEngine.cs

@@ -0,0 +1,46 @@
+using RobocraftX.GUI.MyGamesScreen;
+using RobocraftX.Multiplayer;
+using Svelto.ECS;
+using Techblox.GameSelection;
+using TechbloxModdingAPI.Client.Game;
+using TechbloxModdingAPI.Common;
+using TechbloxModdingAPI.Utility;
+
+namespace TechbloxModdingAPI.Client.App;
+
+internal class ClientEngine : IApiEngine
+{
+    public void Ready()
+    {
+    }
+
+    public EntitiesDB entitiesDB { get; set; }
+
+    public void Dispose()
+    {
+    }
+    
+    public ClientMachine[] GetMachines()
+    {
+        var (mgsevs, count) = entitiesDB.QueryEntities<MyGameDataEntityStruct>(MyGamesScreenExclusiveGroups.MyGames);
+        var games = new ClientMachine[count];
+        for (int i = 0; i < count; i++)
+        {
+            Logging.MetaDebugLog($"Found game named {mgsevs[i].GameName}");
+            games[i] = new ClientMachine(mgsevs[i].ID);
+        }
+        return games;
+    }
+
+    public void EnterBuildMode(ClientEnvironment environment, ClientMachine machine)
+    { // TODO: Move to using a single engine per 'type' (see AddEngine())
+        FullGameFields._multiplayerParams.MultiplayerMode = MultiplayerMode.SinglePlayer;
+        ref var selection = ref entitiesDB.QueryEntity<GameSelectionComponent>(GameSelectionConstants.GameSelectionEGID);
+        selection.userContentID.Set(machine.ContentID);
+        selection.triggerStart = true;
+        selection.saveType = SaveType.ExistingSave;
+        selection.saveName.Set(machine.Name);
+        selection.gameMode = machine is ClientWorld ? GameMode.CreateWorld : GameMode.PlayGame;
+        selection.gameID.Set(environment.Id); //TODO: Expose to the API
+    }
+}

TechbloxModdingAPI/Client/App/GameClient.cs

@@ -0,0 +1,79 @@
+using System;
+using TechbloxModdingAPI.Client.Game;
+using TechbloxModdingAPI.Common.Engines;
+using TechbloxModdingAPI.Utility;
+using UnityEngine;
+
+namespace TechbloxModdingAPI.Client.App;
+
+/// <summary>
+/// Contains information about the game client's current state.
+/// </summary>
+public static class GameClient
+{
+	private static readonly ClientEngine _engine = new();
+
+	public static GameState CurrentState
+	{
+		get => _currentState;
+		internal set
+		{
+			_currentState = value;
+			var old = _currentState;
+			_stateChanged.Invoke(null, new GameStateChangedArgs { OldState = old, NewState = value });
+		}
+	}
+
+	private static GameState _currentState;
+
+
+	/// <summary>
+	/// An event that fires whenever the game's state changes
+	/// </summary>
+	public static event EventHandler<GameStateChangedArgs> StateChanged
+	{
+		add => _stateChanged += value;
+		remove => _stateChanged -= value;
+	}
+
+	private static WrappedHandler<GameStateChangedArgs> _stateChanged;
+
+	/// <summary>
+	/// Techblox build version string.
+	/// Usually this is in the form YYYY.mm.DD.HH.MM.SS
+	/// </summary>
+	/// <value>The version.</value>
+	public static string Version => Application.version;
+
+	/// <summary>
+	/// Unity version string.
+	/// </summary>
+	/// <value>The unity version.</value>
+	public static string UnityVersion => Application.unityVersion;
+
+	/// <summary>
+	/// Environments (maps) currently visible in the menu.
+	/// These take a second to completely populate after the EnterMenu event fires.
+	/// </summary>
+	/// <value>Available environments.</value>
+	public static ClientEnvironment[] Environments { get; }
+
+	public static ClientMachine[] Machines { get; }
+
+	public static void EnterBuildMode(ClientEnvironment environment, ClientMachine machine)
+	{
+		var env = new ClientEnvironment("GAMEID_Road_Track"); // TODO: The options are hardcoded
+		_engine.EnterBuildMode(env, machine);
+	}
+
+	public static void Init()
+	{
+		EngineManager.AddEngine(_engine, ApiEngineType.Menu);
+	}
+
+	public struct GameStateChangedArgs
+	{
+		public GameState OldState { get; set; }
+		public GameState NewState { get; set; }
+	}
+}

TechbloxModdingAPI/Client/App/Popup.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Reflection;
+using HarmonyLib;
+using RobocraftX.Services;
+using TechbloxModdingAPI.Common.Utils;
+
+namespace TechbloxModdingAPI.Client.App;
+
+public static class Popup
+{
+	private static Func<object> ErrorHandlerInstanceGetter;
+
+	private static Action<object, Error> EnqueueError;
+	
+	/// <summary>
+	/// Open a popup which prompts the user to click a button.
+	/// This reuses Techblox's error dialog popup
+	/// </summary>
+	/// <param name="popup">The popup to display. Use an instance of SingleChoicePrompt or DualChoicePrompt.</param>
+	public static void PromptUser(Error popup)
+	{
+		// if the stuff wasn't mostly set to internal, this would be written as:
+		// RobocraftX.Services.ErrorHandler.Instance.EnqueueError(error);
+		object errorHandlerInstance = ErrorHandlerInstanceGetter();
+		EnqueueError(errorHandlerInstance, popup);
+	}
+
+	public static void CloseCurrentPrompt()
+	{
+		object errorHandlerInstance = ErrorHandlerInstanceGetter();
+		var popup = GetPopupCloseMethods(errorHandlerInstance);
+		popup.Close();
+	}
+
+	public static void SelectFirstPromptButton()
+	{
+		object errorHandlerInstance = ErrorHandlerInstanceGetter();
+		var popup = GetPopupCloseMethods(errorHandlerInstance);
+		popup.FirstButton();
+	}
+
+	public static void SelectSecondPromptButton()
+	{
+		object errorHandlerInstance = ErrorHandlerInstanceGetter();
+		var popup = GetPopupCloseMethods(errorHandlerInstance);
+		popup.SecondButton();
+	}
+
+	internal static void Init()
+	{
+		var errorHandler = AccessTools.TypeByName("RobocraftX.Services.ErrorHandler");
+		ErrorHandlerInstanceGetter = GenInstanceGetter(errorHandler);
+		EnqueueError = GenEnqueueError(errorHandler);
+	}
+
+	// Creating delegates once is faster than reflection every time
+	// Admittedly, this way is more difficult to code and less readable
+
+	private static Func<object> GenInstanceGetter(Type handler)
+	{
+		return Reflections.CreateAccessor<Func<object>>("Instance", handler);
+	}
+
+	private static Action<object, Error> GenEnqueueError(Type handler)
+	{
+		var enqueueError = AccessTools.Method(handler, "EnqueueError");
+		return Reflections.CreateMethodCall<Action<object, Error>>(enqueueError, handler);
+	}
+
+	private static (Action Close, Action FirstButton, Action SecondButton) _errorPopup;
+
+	private static (Action Close, Action FirstButton, Action SecondButton) GetPopupCloseMethods(object handler)
+	{
+		if (_errorPopup.Close != null)
+			return _errorPopup;
+		Type errorHandler = handler.GetType();
+		FieldInfo field = AccessTools.Field(errorHandler, "errorPopup");
+		var errorPopup = (ErrorPopup)field.GetValue(handler);
+		MethodInfo info = AccessTools.Method(errorPopup.GetType(), "ClosePopup");
+		var close = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
+		info = AccessTools.Method(errorPopup.GetType(), "HandleFirstOption");
+		var first = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
+		info = AccessTools.Method(errorPopup.GetType(), "HandleSecondOption");
+		var second = (Action)Delegate.CreateDelegate(typeof(Action), errorPopup, info);
+		_errorPopup = (close, first, second);
+		return _errorPopup;
+	}
+}

TechbloxModdingAPI/Client/Game/ClientEnvironment.cs

@@ -5,5 +5,10 @@ namespace TechbloxModdingAPI.Client.Game;
 /// </summary>
 public class ClientEnvironment
 {
+    public string Id { get; }
     
+    public ClientEnvironment(string id)
+    {
+        Id = id;
+    }
 }

TechbloxModdingAPI/Client/Game/ClientMachine.cs

@@ -0,0 +1,15 @@
+using System;
+using RobocraftX.GUI.MyGamesScreen;
+using Svelto.ECS;
+
+namespace TechbloxModdingAPI.Client.Game;
+
+public class ClientMachine : EcsObjectBase
+{
+    public ClientMachine(EGID id) : base(id, typeof(MyGameDataEntityDescriptor))
+    {
+    }
+
+    public string ContentID { get; set; } // TODO
+    public string Name { get; set; }
+}

TechbloxModdingAPI/Client/Game/ClientWorld.cs

@@ -0,0 +1,10 @@
+using Svelto.ECS;
+
+namespace TechbloxModdingAPI.Client.Game;
+
+public class ClientWorld : ClientMachine
+{
+    public ClientWorld(EGID id) : base(id)
+    {
+    }
+}

TechbloxModdingAPI/Commands/CommandManager.cs

@@ -15,7 +15,7 @@ namespace TechbloxModdingAPI.Commands
     /// </summary>
     public static class CommandManager
     {
-        private static Dictionary<string, ICustomCommandEngine> _customCommands = new Dictionary<string, ICustomCommandEngine>();
+        private static Dictionary<string, ICustomCommandEngine> _customCommands = new();
 
 		private static EnginesRoot _lastEngineRoot;
 

TechbloxModdingAPI/Commands/CustomCommands.cs

@@ -14,7 +14,7 @@ namespace TechbloxModdingAPI.Commands
             public Delegate Action;
         }
 
-        private static Dictionary<string, CommandData> _commands = new Dictionary<string, CommandData>();
+        private static Dictionary<string, CommandData> _commands = new();
         public static void Register(string name, Delegate action, string desc)
         {
             _commands.Add(name, new CommandData
@@ -51,7 +51,6 @@ namespace TechbloxModdingAPI.Commands
 
         public static bool Exists(string name) => _commands.ContainsKey(name);
 
-        public static ReadOnlyDictionary<string, CommandData> GetAllCommandData() =>
-            new ReadOnlyDictionary<string, CommandData>(_commands);
+        public static ReadOnlyDictionary<string, CommandData> GetAllCommandData() => new(_commands);
     }
 }

TechbloxModdingAPI/Commands/ICustomCommandEngine.cs

@@ -1,13 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-using Svelto.ECS;
-
-using TechbloxModdingAPI.Utility;
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
 
 namespace TechbloxModdingAPI.Commands
 {
@@ -16,7 +7,7 @@ namespace TechbloxModdingAPI.Commands
 	/// If you are using implementing this yourself, you must manually register the command.
 	/// See SimpleCustomCommandEngine's Ready() and Dispose() methods for an example of command registration.
     /// </summary>
-    public interface ICustomCommandEngine : IApiEngine
+    public interface ICustomCommandEngine : INamedApiEngine
     {
         /// <summary>
         /// The command's description, shown in command help messages

TechbloxModdingAPI/Common/Engines/ApiEngineType.cs

@@ -0,0 +1,21 @@
+namespace TechbloxModdingAPI.Common.Engines;
+
+public enum ApiEngineType
+{
+    /// <summary>
+    /// Gets created and registered when loading the game and stays loaded until it's quit. Intended for menu changes.
+    /// </summary>
+    Menu,
+    /// <summary>
+    /// Gets created and registered when entering build mode.
+    /// </summary>
+    Build,
+    /// <summary>
+    /// Gets created and registered on the client's side when starting simulation (test or not).
+    /// </summary>
+    PlayClient,
+    /// <summary>
+    /// Gets created and registered on the server's side when starting simulation (test or not).
+    /// </summary>
+    PlayServer
+}

TechbloxModdingAPI/Common/Engines/EngineManager.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using RobocraftX.StateSync;
+using Svelto.ECS;
+using TechbloxModdingAPI.Utility;
+
+namespace TechbloxModdingAPI.Common.Engines;
+
+public class EngineManager
+{
+    private static Dictionary<ApiEngineType, List<IApiEngine>> _engines = new();
+
+    /// <summary>
+    /// Register an engine to a given game state and type. Or multiple.
+    /// </summary>
+    /// <param name="engine">The engine</param>
+    /// <param name="types">The types to register to</param>
+    public static void AddEngine(IApiEngine engine, params ApiEngineType[] types)
+    {
+        foreach (var type in types)
+        {
+            if (!_engines.ContainsKey(type))
+                _engines.Add(type, new List<IApiEngine>());
+            _engines[type].Add(engine);
+        }
+    }
+
+    public static void RegisterEngines(StateSyncRegistrationHelper helper, EnginesRoot enginesRoot, ApiEngineType type)
+    {
+        IEntityFactory factory = enginesRoot.GenerateEntityFactory();
+        IEntityFunctions functions = enginesRoot.GenerateEntityFunctions();
+        foreach (var engine in _engines[type])
+        {
+            string name = engine is INamedApiEngine namedEngine ? namedEngine.Name : engine.ToString();
+            Logging.MetaDebugLog($"Registering {type} IApiEngine {name}");
+            if (engine is IDeterministicEngine detEngine)
+                if (helper is not null) helper.AddDeterministicEngine(detEngine);
+                else throw new InvalidOperationException($"Attempting to add deterministic engine to non-deterministic state {type}");
+            else
+                enginesRoot.AddEngine(engine);
+            switch (engine)
+            {
+                case IFactoryEngine factEngine:
+                    factEngine.Factory = factory;
+                    break;
+                case IFunEngine funEngine:
+                    funEngine.Functions = functions;
+                    break;
+            }
+        }
+    }
+}

TechbloxModdingAPI/Engines/EnginePatches.cs → TechbloxModdingAPI/Common/Engines/EnginePatches.cs

@@ -5,22 +5,21 @@ using RobocraftX.CR.MainGame;
 using RobocraftX.FrontEnd;
 using RobocraftX.StateSync;
 using Svelto.ECS;
-using Svelto.ECS.Schedulers;
 using TechbloxModdingAPI.Commands;
 using TechbloxModdingAPI.Utility;
+using GameState = TechbloxModdingAPI.Client.App.GameState;
 
-namespace TechbloxModdingAPI.Engines
+namespace TechbloxModdingAPI.Common.Engines
 {
 	[HarmonyPatch]
 	static class GameLoadedTimeStoppedEnginePatch
 	{
 		public static void Postfix(StateSyncRegistrationHelper stateSyncReg)
 		{
+			Client.App.GameClient.CurrentState = GameState.InMachineEditor; // TODO: World editor
 			// register all game engines, including deterministic
 			GameEngineManager.RegisterEngines(stateSyncReg);
 			// register command engines
-			/*CommandLineCompositionRoot.Compose(contextHolder, stateSyncReg.enginesRoot, reloadGame, multiplayerParameters,
-			    stateSyncReg); - uREPL C# compilation not supported anymore */
 			CommandManager.RegisterEngines(stateSyncReg.enginesRoot);
 		}
 
@@ -35,6 +34,7 @@ namespace TechbloxModdingAPI.Engines
 	{
 		public static void Postfix(StateSyncRegistrationHelper stateSyncReg)
 		{
+			Client.App.GameClient.CurrentState = GameState.InTestMode; // TODO: Client/server
 			GameEngineManager.RegisterEngines(stateSyncReg);
 			CommandManager.RegisterEngines(stateSyncReg.enginesRoot);
 		}
@@ -49,21 +49,36 @@ namespace TechbloxModdingAPI.Engines
 	static class GameReloadedPatch
 	{
 		internal static bool IsReload;
-		public static void Prefix() => IsReload = true;
+		public static void Prefix()
+		{
+			IsReload = true;
+			Client.App.GameClient.CurrentState = GameState.Loading;
+		}
+
 		public static MethodBase TargetMethod() => AccessTools.Method(typeof(FullGameCompositionRoot), "ReloadGame");
 	}
 
 	[HarmonyPatch]
 	static class GameSwitchedToPatch
 	{
-		public static void Prefix() => GameReloadedPatch.IsReload = false;
+		public static void Prefix()
+		{
+			GameReloadedPatch.IsReload = false;
+			Client.App.GameClient.CurrentState = GameState.Loading;
+		}
+
 		public static MethodBase TargetMethod() => AccessTools.Method(typeof(FullGameCompositionRoot), "SwitchToGame");
 	}
 
 	[HarmonyPatch]
 	static class MenuSwitchedToPatch
 	{
-		public static void Prefix() => GameReloadedPatch.IsReload = false;
+		public static void Prefix()
+		{
+			GameReloadedPatch.IsReload = false;
+			Client.App.GameClient.CurrentState = GameState.Loading;
+		}
+
 		public static MethodBase TargetMethod() => AccessTools.Method(typeof(FullGameCompositionRoot), "SwitchToMenu");
 	}
 	
@@ -72,6 +87,7 @@ namespace TechbloxModdingAPI.Engines
 	{
 		public static void Postfix(EnginesRoot enginesRoot)
 		{
+			Client.App.GameClient.CurrentState = GameState.InMenu; // TODO: Loaded states
 			// register menu engines
 			MenuEngineManager.RegisterEngines(enginesRoot);
 		}
@@ -87,6 +103,7 @@ namespace TechbloxModdingAPI.Engines
 	{
 		public static void Postfix(FullGameCompositionRoot __instance)
 		{
+			Client.App.GameClient.CurrentState = GameState.Loading;
 			FullGameFields.Init(__instance);
 		}
 

TechbloxModdingAPI/Common/Engines/IFactoryEngine.cs

@@ -0,0 +1,15 @@
+using Svelto.ECS;
+
+namespace TechbloxModdingAPI.Common.Engines;
+
+/// <summary>
+/// Engine interface to create entities using the given Factory.
+/// </summary>
+public interface IFactoryEngine : IApiEngine
+{
+    /// <summary>
+    /// The EntityFactory for the entitiesDB.
+    /// Use this to create entities in ECS.
+    /// </summary>
+    IEntityFactory Factory { set; }
+}

TechbloxModdingAPI/Common/Engines/IFunEngine.cs

@@ -0,0 +1,11 @@
+using Svelto.ECS;
+
+namespace TechbloxModdingAPI.Common.Engines;
+
+/// <summary>
+/// Engine interface to use entity functions to remove entities or swap their groups.
+/// </summary>
+public interface IFunEngine : IApiEngine
+{
+    public IEntityFunctions Functions { set; }
+}

TechbloxModdingAPI/Common/Engines/IReactionaryEngine.cs

@@ -0,0 +1,12 @@
+using Svelto.ECS;
+using TechbloxModdingAPI.Common;
+
+namespace TechbloxModdingAPI.Engines
+{
+    /// <summary>
+    /// Engine interface to react on an entity component being added or removed.
+    /// </summary>
+	public interface IReactionaryEngine<T> : IApiEngine, IReactOnAddAndRemove<T> where T : unmanaged, IEntityComponent
+    {
+    }
+}

TechbloxModdingAPI/Common/IApiEngine.cs

@@ -0,0 +1,11 @@
+using System;
+using Svelto.ECS;
+
+namespace TechbloxModdingAPI.Common;
+
+/// <summary>
+/// Base engine interface used by all TechbloxModdingAPI engines
+/// </summary>
+public interface IApiEngine : IQueryingEntitiesEngine, IDisposable
+{
+}

TechbloxModdingAPI/Common/INamedApiEngine.cs

@@ -0,0 +1,9 @@
+namespace TechbloxModdingAPI.Common;
+
+public interface INamedApiEngine : IApiEngine
+{
+    /// <summary>
+    /// The name of the engine
+    /// </summary>
+    string Name { get; }
+}

TechbloxModdingAPI/Engines/IApiEngine.cs

@@ -1,26 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-using Svelto.ECS;
-
-namespace TechbloxModdingAPI.Engines
-{
-    /// <summary>
-    /// Base engine interface used by all TechbloxModdingAPI engines
-    /// </summary>
-    public interface IApiEngine : IEngine, IQueryingEntitiesEngine, IDisposable
-    {
-        /// <summary>
-        /// The name of the engine
-        /// </summary>
-        string Name { get; }
-
-		/// <summary>
-        /// Whether the emitter can be removed with Manager.RemoveEventEmitter(name)
-        /// </summary>
-        bool isRemovable { get; } 
-    }
-}

TechbloxModdingAPI/Engines/IFactoryEngine.cs

@@ -1,24 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-using Svelto.ECS;
-
-using TechbloxModdingAPI.Utility;
-
-namespace TechbloxModdingAPI.Engines
-{
-    /// <summary>
-    /// Engine interface to create a ModEventEntityStruct in entitiesDB when Emit() is called.
-    /// </summary>
-    public interface IFactoryEngine : IApiEngine
-    {
-        /// <summary>
-        /// The EntityFactory for the entitiesDB.
-        /// Use this to create a ModEventEntityStruct when Emit() is called.
-        /// </summary>
-        IEntityFactory Factory { set; }
-    }
-}

TechbloxModdingAPI/Engines/IFunEngine.cs

@@ -1,9 +0,0 @@
-using Svelto.ECS;
-
-namespace TechbloxModdingAPI.Engines
-{
-    public interface IFunEngine : IApiEngine
-    {
-        public IEntityFunctions Functions { set; }
-    }
-}

TechbloxModdingAPI/Engines/IReactionaryEngine.cs

@@ -1,20 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-using Svelto.ECS;
-using Svelto.ECS.Internal;
-
-using TechbloxModdingAPI.Events;
-
-namespace TechbloxModdingAPI.Engines
-{
-    /// <summary>
-    /// Engine interface to handle ModEventEntityStruct events emitted by IEventEmitterEngines.
-    /// </summary>
-	public interface IReactionaryEngine<T> : IApiEngine, IReactOnAddAndRemove<T> where T : unmanaged, IEntityComponent
-    {
-    }
-}

TechbloxModdingAPI/Input/FakeInput.cs

@@ -7,7 +7,7 @@ namespace TechbloxModdingAPI.Input
 {
     public static class FakeInput
     {
-		internal static readonly FakeInputEngine inputEngine = new FakeInputEngine();
+		internal static readonly FakeInputEngine inputEngine = new();
 
 		/// <summary>
 		/// Customize the local input.

TechbloxModdingAPI/Input/FakeInputEngine.cs

@@ -1,12 +1,8 @@
-using System;
-
-using RobocraftX.Common;
+using RobocraftX.Common;
 using RobocraftX.Common.Input;
 using RobocraftX.Players;
 using Svelto.ECS;
-
-using TechbloxModdingAPI.Utility;
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
 
 namespace TechbloxModdingAPI.Input
 {

TechbloxModdingAPI/Interface/IMGUI/Group.cs

@@ -13,7 +13,7 @@ namespace TechbloxModdingAPI.Interface.IMGUI
     {
         private bool automaticLayout;
         
-        private FasterList<UIElement> elements = new FasterList<UIElement>();
+        private FasterList<UIElement> elements = new();
 
         /// <summary>
         /// The rectangular area in the window that the UI group can use

TechbloxModdingAPI/Main.cs

@@ -70,7 +70,6 @@ namespace TechbloxModdingAPI
                 Wire.Init();
                 // init client
                 Logging.MetaDebugLog($"Initializing Client");
-                Client.Init();
                 Game.Init();
                 // init UI
                 Logging.MetaDebugLog($"Initializing UI");

TechbloxModdingAPI/Persistence/SerializerManager.cs

@@ -15,9 +15,9 @@ namespace TechbloxModdingAPI.Persistence
     /// </summary>
     public static class SerializerManager
     {
-		private static Dictionary<string, IEntitySerializer> _serializers = new Dictionary<string, IEntitySerializer>();
+		private static Dictionary<string, IEntitySerializer> _serializers = new();
 
-		private static Dictionary<string, Action<IEntitySerialization>> _registrations = new Dictionary<string, Action<IEntitySerialization>>();
+		private static Dictionary<string, Action<IEntitySerialization>> _registrations = new();
 
 		private static EnginesRoot _lastEnginesRoot;
 

TechbloxModdingAPI/Player.cs

@@ -24,8 +24,8 @@ namespace TechbloxModdingAPI
     public partial class Player : EcsObjectBase, IEquatable<Player>, IEquatable<EGID>
     {
         // static functionality
-		private static readonly PlayerEngine playerEngine = new PlayerEngine();
-		private static readonly PlayerEventsEngine playerEventsEngine = new PlayerEventsEngine();
+		private static readonly PlayerEngine playerEngine = new();
+		private static readonly PlayerEventsEngine playerEventsEngine = new();
 		private static Player localPlayer;
 
         /// <summary>
@@ -38,7 +38,7 @@ namespace TechbloxModdingAPI
             switch (player)
             {
                 case PlayerType.Remote:
-                    return playerEngine.GetRemotePlayer() != uint.MaxValue;
+	                return playerEngine.GetRemotePlayers().Length > 0;
                 case PlayerType.Local:
                     return playerEngine.GetLocalPlayer() != uint.MaxValue;
             }
@@ -90,7 +90,7 @@ namespace TechbloxModdingAPI
         /// Initializes a new instance of the <see cref="T:TechbloxModdingAPI.Player"/> class.
         /// </summary>
         /// <param name="id">The player's unique identifier.</param>
-        public Player(uint id) : base(new EGID(id, CharacterExclusiveGroups.OnFootGroup))
+        public Player(uint id) : base(new EGID(id, CharacterExclusiveGroups.OnFootGroup), typeof(CharacterEntityDescriptor))
         {
             this.Id = id;
             if (!Exists(id))
@@ -100,38 +100,6 @@ namespace TechbloxModdingAPI
             this.Type = playerEngine.GetLocalPlayer() == id ? PlayerType.Local : PlayerType.Remote;
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="T:TechbloxModdingAPI.Player"/> class.
-        /// </summary>
-        /// <param name="player">The player type. Chooses the first available player matching the criteria.</param>
-        public Player(PlayerType player) : base(ecs =>
-        {
-	        uint id;
-	        switch (player)
-	        {
-		        case PlayerType.Local:
-			        id = playerEngine.GetLocalPlayer();
-			        break;
-		        case PlayerType.Remote:
-			        id = playerEngine.GetRemotePlayer();
-			        break;
-		        default:
-			        id = uint.MaxValue;
-			        break;
-	        }
-
-	        if (id == uint.MaxValue)
-	        {
-		        throw new PlayerNotFoundException($"No player of {player} type exists");
-	        }
-
-	        return new EGID(id, CharacterExclusiveGroups.OnFootGroup);
-        })
-        {
-	        this.Type = player;
-	        Id = base.Id.entityID;
-        }
-
         // object fields & properties
 
         /// <summary>

TechbloxModdingAPI/Players/PlayerEngine.cs

@@ -14,11 +14,9 @@ using RobocraftX.SimulationModeState;
 using Svelto.ECS;
 using Techblox.Camera;
 using Unity.Mathematics;
-using Svelto.ECS.DataStructures;
 using Techblox.BuildingDrone;
 using Techblox.Character;
-
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common.Engines;
 using TechbloxModdingAPI.Input;
 using TechbloxModdingAPI.Utility;
 using TechbloxModdingAPI.Utility.ECS;
@@ -58,15 +56,17 @@ namespace TechbloxModdingAPI.Players
 			return uint.MaxValue;
 		}
 
-        public uint GetRemotePlayer()
+        public uint[] GetRemotePlayers()
 		{
-			if (!isReady) return uint.MaxValue;
+			if (!isReady) return Array.Empty<uint>();
 			var (localPlayers, count) = entitiesDB.QueryEntities<PlayerIDStruct>(PlayersExclusiveGroups.RemotePlayers);
-            if (count > 0)
-            {
-                return localPlayers[0].ID.entityID;
-            }
-			return uint.MaxValue;
+			var players = new uint[count];
+			for (int i = 0; i < count; i++)
+			{
+				players[i] = localPlayers[i].ID.entityID;
+			}
+
+			return players;
 		}
 
         public long GetAllPlayerCount()

TechbloxModdingAPI/Players/PlayerEventsEngine.cs

@@ -1,10 +1,8 @@
-using System;
 using RobocraftX.Character;
 using RobocraftX.Character.Movement;
 using RobocraftX.Common.Input;
 using Svelto.ECS;
-
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
 
 namespace TechbloxModdingAPI.Players
 {

TechbloxModdingAPI/Players/PlayerTests.cs

@@ -7,6 +7,7 @@ using Unity.Mathematics;
 
 using TechbloxModdingAPI.App;
 using TechbloxModdingAPI.Blocks;
+using TechbloxModdingAPI.Client.App;
 using TechbloxModdingAPI.Tests;
 using TechbloxModdingAPI.Utility;
 
@@ -73,7 +74,7 @@ namespace TechbloxModdingAPI.Players
 				while (Player.LocalPlayer.State != PlayerState.InSeat)
 				{
 					bool cont = false;
-					Client.Instance.PromptUser(new SingleChoicePrompt("Testing", $"Enter the seat at {seat.Position} pls", "OK", () => cont = true));
+					Popup.PromptUser(new SingleChoicePrompt("Testing", $"Enter the seat at {seat.Position} pls", "OK", () => cont = true));
 					while (!cont)
 						yield return Yield.It;
 					yield return new WaitForSecondsEnumerator(5f).Continue();

TechbloxModdingAPI/SimBody.cs

@@ -27,7 +27,7 @@ namespace TechbloxModdingAPI
         private Cluster cluster;
         private readonly uint clusterId = uint.MaxValue;
 
-        public SimBody(EGID id) : base(id)
+        public SimBody(EGID id) : base(id, typeof(ClusterEntityDescriptor))
         {
         }
 

TechbloxModdingAPI/Tasks/Scheduler.cs

@@ -32,9 +32,9 @@ namespace TechbloxModdingAPI.Tasks
             }
         }
 
-        public static readonly Svelto.Tasks.ExtraLean.Unity.UpdateMonoRunner extraLeanRunner = new Svelto.Tasks.ExtraLean.Unity.UpdateMonoRunner("TechbloxModdingAPIExtraLean");
+        public static readonly Svelto.Tasks.ExtraLean.Unity.UpdateMonoRunner extraLeanRunner = new("TechbloxModdingAPIExtraLean");
 
-        public static readonly Svelto.Tasks.Lean.Unity.UpdateMonoRunner leanRunner = new Svelto.Tasks.Lean.Unity.UpdateMonoRunner("TechbloxModdingAPILean");
+        public static readonly Svelto.Tasks.Lean.Unity.UpdateMonoRunner leanRunner = new("TechbloxModdingAPILean");
 
         /// <summary>
         /// Schedule a task to run asynchronously.

TechbloxModdingAPI/Tests/Assert.cs

@@ -14,7 +14,7 @@ namespace TechbloxModdingAPI.Tests
     {
 		private static StreamWriter logFile = null;
 
-		private static ConcurrentDictionary<string, string> callbacks = new ConcurrentDictionary<string, string>();
+		private static ConcurrentDictionary<string, string> callbacks = new();
 
 		private const string PASS = "SUCCESS: ";
 

TechbloxModdingAPI/Tests/TestRoot.cs

@@ -8,11 +8,12 @@ using Svelto.Tasks;
 using Svelto.Tasks.Lean;
 using Svelto.Tasks.Enumerators;
 using Svelto.Tasks.Lean.Unity;
+using TechbloxModdingAPI.Client.App;
 using UnityEngine;
 
-using TechbloxModdingAPI.App;
 using TechbloxModdingAPI.Tasks;
 using TechbloxModdingAPI.Utility;
+using GameState = TechbloxModdingAPI.Client.App.GameState;
 
 namespace TechbloxModdingAPI.Tests
 {
@@ -66,19 +67,33 @@ namespace TechbloxModdingAPI.Tests
 			_testsCountPassed = 0;
 			_testsCountFailed = 0;
 			// flow control
-			Game.Enter += (sender, args) => { GameTests().RunOn(new UpdateMonoRunner("TechbloxModdingAPITestRunner")); };
-			Game.Exit += (s, a) => state = "ReturningFromGame";
-			Client.EnterMenu += (sender, args) =>
+			Client.App.GameClient.StateChanged += (sender, args) =>
 			{
-				if (state == "EnteringMenu") 
+				switch (args.NewState)
 				{
-					MenuTests().RunOn(Scheduler.leanRunner);
-					state = "EnteringGame";
-				}
-				if (state == "ReturningFromGame")
-				{
-					TearDown().RunOn(Scheduler.leanRunner);
-					state = "ShuttingDown";
+					case GameState.InMenu:
+					{
+						if (state == "EnteringMenu")
+						{
+							MenuTests().RunOn(Scheduler.leanRunner);
+							state = "EnteringGame";
+						}
+
+						if (state == "ReturningFromGame")
+						{
+							TearDown().RunOn(Scheduler.leanRunner);
+							state = "ShuttingDown";
+						}
+
+						break;
+					}
+					case GameState.InMachineEditor:
+						GameTests().RunOn(new UpdateMonoRunner("TechbloxModdingAPITestRunner"));
+						break;
+					case GameState.Loading:
+						if (args.OldState == GameState.InTestMode)
+							state = "ReturningFromGame";
+						break;
 				}
 			};
             // init tests here
@@ -131,17 +146,16 @@ namespace TechbloxModdingAPI.Tests
 
 		private static IEnumerator<TaskContract> GoToGameTests()
 		{
-			Client app = Client.Instance;
 			int oldLength = 0;
-			while (app.MyGames.Length == 0 || oldLength != app.MyGames.Length)
+			while (GameClient.Machines.Length == 0 || oldLength != GameClient.Machines.Length)
 			{
-				oldLength = app.MyGames.Length;
+				oldLength = GameClient.Machines.Length;
 				yield return new WaitForSecondsEnumerator(1).Continue();
 			}
 			yield return Yield.It;
 			try
 			{
-				app.MyGames[0].EnterGame();
+				GameClient.Machines[0].EnterGame();
 			}
 			catch (Exception e)
 			{

TechbloxModdingAPI/Utility/DebugInterfaceEngine.cs

@@ -1,23 +1,17 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Reflection;
 using System.Reflection.Emit;
 using System.Text;
-using System.Text.Formatting;
-using TechbloxModdingAPI.Blocks;
-using TechbloxModdingAPI.Players;
 using HarmonyLib;
-using RobocraftX.GUI.Debug;
 using Svelto.ECS;
-using Svelto.ECS.Experimental;
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
 
 namespace TechbloxModdingAPI.Utility
 {
     public class DebugInterfaceEngine : IApiEngine
     {
-        private static Dictionary<string, Func<string>> _extraInfo=new Dictionary<string, Func<string>>();
+        private static Dictionary<string, Func<string>> _extraInfo=new();
         public void Ready()
         {
         }
@@ -46,8 +40,8 @@ namespace TechbloxModdingAPI.Utility
                     int index = list.FindLastIndex(inst => inst.opcode == OpCodes.Ldfld);
                     var array = new CodeInstruction[]
                     {
-                        new CodeInstruction(OpCodes.Ldloc_0), //StringBuffer
-                        new CodeInstruction(OpCodes.Call, ((Action<StringBuilder>)AddInfo).Method)
+                        new(OpCodes.Ldloc_0), //StringBuffer
+                        new(OpCodes.Call, ((Action<StringBuilder>)AddInfo).Method)
                     };
                     list.InsertRange(index - 1, array); //-1: ldloc.1 ("local") before ldfld
                 }

TechbloxModdingAPI/Utility/GameEngineManager.cs

@@ -3,7 +3,8 @@ using System.Linq;
 
 using RobocraftX.StateSync;
 using Svelto.ECS;
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
+using TechbloxModdingAPI.Common.Engines;
 
 namespace TechbloxModdingAPI.Utility
 {
@@ -12,7 +13,7 @@ namespace TechbloxModdingAPI.Utility
     /// </summary>
     public static class GameEngineManager
     {
-        private static Dictionary<string, IApiEngine> _gameEngines = new Dictionary<string, IApiEngine>();
+        private static Dictionary<string, IApiEngine> _gameEngines = new();
 
 		private static EnginesRoot _lastEngineRoot;
 

TechbloxModdingAPI/Utility/GameState.cs

@@ -11,7 +11,7 @@ namespace TechbloxModdingAPI.Utility
     /// </summary>
     public static class GameState
     {
-        private static GameStateEngine gameEngine = new GameStateEngine();
+        private static GameStateEngine gameEngine = new();
 
         /// <summary>
         /// Is the game in edit mode?

TechbloxModdingAPI/Utility/GameStateEngine.cs

@@ -1,12 +1,6 @@
 using Svelto.ECS;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
 using RobocraftX.SimulationModeState;
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
 
 namespace TechbloxModdingAPI.Utility
 {

TechbloxModdingAPI/Utility/MenuEngineManager.cs

@@ -1,11 +1,8 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
 using Svelto.ECS;
-using TechbloxModdingAPI.Engines;
+using TechbloxModdingAPI.Common;
+using TechbloxModdingAPI.Common.Engines;
 
 namespace TechbloxModdingAPI.Utility
 {
@@ -14,7 +11,7 @@ namespace TechbloxModdingAPI.Utility
     /// </summary>
     public static class MenuEngineManager
     {
-        private static Dictionary<string, IApiEngine> _menuEngines = new Dictionary<string, IApiEngine>();
+        private static Dictionary<string, IApiEngine> _menuEngines = new();
 
 		private static EnginesRoot _lastEngineRoot;
 

TechbloxModdingAPI/Utility/WrappedHandler.cs

@@ -15,8 +15,7 @@ namespace TechbloxModdingAPI.Utility
         /// <summary>
         /// Store wrappers so we can unregister them properly
         /// </summary>
-        private static Dictionary<EventHandler<T>, EventHandler<T>> wrappers =
-            new Dictionary<EventHandler<T>, EventHandler<T>>();
+        private static Dictionary<EventHandler<T>, EventHandler<T>> wrappers = new();
 
         public static WrappedHandler<T> operator +(WrappedHandler<T> original, EventHandler<T> added)
         {