minecraft-modpack-updater/ModpackUpdater/AppConfig.cs

using Newtonsoft.Json;

namespace ModpackUpdater;

public class AppConfig
{
    public string LastMinecraftProfilePath { get; set; }
    public string LastConfigFilePath { get; set; }
    public List<string> KeepLocalFiles { get; set; } = [];

    public void Reset()
    {
        KeepLocalFiles.Clear();
        KeepLocalFiles.Add("OptiFine_1.7.10_HD_U_E7.jar");
    }

    private static AppConfig instance = null;

    public static AppConfig Instance
    {
        get
        {

            if (instance is null)
            {
                if (File.Exists(SettingsPath))
                    instance = LoadConfig(SettingsPath);
                else
                {
                    instance = new AppConfig();
                    instance.Reset();
                }
            }

            return instance;
        }
    }
    private static string settingsPath = string.Empty;

    private static string SettingsPath
    {
        get
        {
            const string AppDataDirectoryName = "MinecraftModpackUpdater";
            const string SettingsFileName = "Settings.json";

            if (string.IsNullOrEmpty(settingsPath))
            {
                settingsPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), AppDataDirectoryName);
                Directory.CreateDirectory(settingsPath);
                settingsPath = Path.Combine(settingsPath, SettingsFileName);
            }

            return settingsPath;
        }
    }

    public void SaveConfig()
    {
        File.WriteAllText(SettingsPath, JsonConvert.SerializeObject(this));
    }

    private static AppConfig LoadConfig(string filePath)
    {
        return JsonConvert.DeserializeObject<AppConfig>(File.ReadAllText(filePath));
    }
}