new-horizons/NewHorizons/OtherMods/MenuFramework/MenuHandler.cs

using NewHorizons.External;
using NewHorizons.Handlers;
using NewHorizons.Utility;
using OWML.Common;
using System.Collections.Generic;
using System.Net.Mail;
using UnityEngine;
using static UnityEngine.InputSystem.InputRemoting;
using Logger = NewHorizons.Utility.Logger;

namespace NewHorizons.OtherMods.MenuFramework
{
    public static class MenuHandler
    {
        private static IMenuAPI _menuApi;

        private static List<(IModBehaviour mod, string message)> _registeredPopups;

        public static void Init()
        {
            _menuApi = Main.Instance.ModHelper.Interaction.TryGetModApi<IMenuAPI>("_nebula.MenuFramework");

            TextTranslation.Get().OnLanguageChanged += OnLanguageChanged;

            _registeredPopups = new();
        }

        public static void OnLanguageChanged()
        {
            // Have to load save data before doing popups
            NewHorizonsData.Load();

            if (!VersionUtility.CheckUpToDate())
            {
                var warning = string.Format(TranslationHandler.GetTranslation("OUTDATED_VERSION_WARNING", TranslationHandler.TextType.UI),
                    VersionUtility.RequiredVersionString,
                    Application.version);

                Logger.LogError(warning);
                _menuApi.RegisterStartupPopup(warning);
            }

            foreach(var (mod, message) in _registeredPopups)
            {
                if (!NewHorizonsData.HasReadOneTimePopup(mod.ModHelper.Manifest.UniqueName))
                {
                    _menuApi.RegisterStartupPopup(TranslationHandler.GetTranslation(message, TranslationHandler.TextType.UI));
                    NewHorizonsData.ReadOneTimePopup(mod.ModHelper.Manifest.UniqueName);
                }
            }

            _registeredPopups.Clear();

            // Just wanted to do this when the language is loaded in initially
            TextTranslation.Get().OnLanguageChanged -= OnLanguageChanged;
        }

        public static void RegisterOneTimePopup(IModBehaviour mod, string message) => _registeredPopups.Add((mod, message));
    }
}