CLre/CLre/API/App/Client.cs

using System;
using System.Reflection;
using HarmonyLib;

namespace CLre.API.App
{
    public static class Client
    {
        public static event EventHandler<SetupEventArgs> InitStart
        {
            add => FrontEnd_SetupContainer_Patch.preSetup += value;
            remove => FrontEnd_SetupContainer_Patch.preSetup -= value;
        }
        
        public static event EventHandler<SetupEventArgs> LogInitComplete
        {
            add => FrontEnd_SetupContainer_Patch.postSyncSetup += value;
            remove => FrontEnd_SetupContainer_Patch.postSyncSetup -= value;
        }
        
        public static event EventHandler<SetupEventArgs> AsynchronousInitComplete
        {
            add => FrontEndGuiEngine_SetMainMenuEnabled_Patch.preMenuEnabled += value;
            remove => FrontEndGuiEngine_SetMainMenuEnabled_Patch.preMenuEnabled -= value;
        }
        
        public static event EventHandler<SetupEventArgs> InitComplete
        {
            add => FrontEndGuiEngine_SetMainMenuEnabled_Patch.postMenuEnabled += value;
            remove => FrontEndGuiEngine_SetMainMenuEnabled_Patch.postMenuEnabled -= value;
        }

        public static string Version
        {
            get => Game.Utilities.VersionReader.GetVersion();
        }
    }
    
    public struct SetupEventArgs {}

    [HarmonyPatch(typeof(FrontEnd.MainFrontEnd), "SetupContainer")]
    class FrontEnd_SetupContainer_Patch
    {
        internal static event EventHandler<SetupEventArgs> postSyncSetup;
        
        internal static event EventHandler<SetupEventArgs> preSetup;

        [HarmonyPrefix]
        public static void BeforeMethodCall(FrontEnd.MainFrontEnd __instance)
        {
            if (preSetup != null) preSetup(__instance, new SetupEventArgs { });
        }

        [HarmonyPostfix]
        public static void AfterMethodCall(FrontEnd.MainFrontEnd __instance)
        {
            if (postSyncSetup != null) postSyncSetup(__instance, new SetupEventArgs { });
        }
    }
    
    [HarmonyPatch]
    class FrontEndGuiEngine_SetMainMenuEnabled_Patch
    {
        internal static event EventHandler<SetupEventArgs> preMenuEnabled;
        
        internal static event EventHandler<SetupEventArgs> postMenuEnabled;

        [HarmonyPrefix]
        public static void BeforeMethodCall(object __instance, bool enabled)
        {
            if (!enabled) return;
            if (preMenuEnabled != null) preMenuEnabled(__instance, new SetupEventArgs { });
        }

        [HarmonyPostfix]
        public static void AfterMethodCall(object __instance, bool enabled)
        {
            if (!enabled) return;
            if (postMenuEnabled != null) postMenuEnabled(__instance, new SetupEventArgs { });
        }

        [HarmonyTargetMethod]
        public static MethodBase ReflectToGetMethodBase()
        {
            return AccessTools.Method("FrontEnd.FrontEndGuiEngine:SetMainMenuEnabled");
        }
    }
}