minecraft-modpack-updater/ModpackUpdater/Program.cs

using Newtonsoft.Json;
using Pilz.Configuration;
using Telerik.WinControls;

namespace ModpackUpdater;

public static class Program
{
    private static readonly SettingsManager settingsManager;

    public static ISettings Settings => settingsManager.Instance;

    static Program()
    {
        settingsManager = new(GetSettingsPath(2), true);
        MigrateLegacySettings(GetSettingsPath(null));
    }

    internal static void Main(string[] args)
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.SetHighDpiMode(HighDpiMode.PerMonitorV2);

        if (ThemeResolutionService.LoadPackageResource("ModpackUpdater.CustomThemes.Office2019DarkBluePurple.tssp"))
            ThemeResolutionService.ApplicationThemeName = "Office2019DarkBluePurple";

        Application.Run(new Form1());
    }

    private static string GetSettingsPath(int? settingsVersion = 2)
    {
        const string AppDataDirectoryName = "MinecraftModpackUpdater";
        var fileNamePostfix = settingsVersion == null ? string.Empty : $"V{settingsVersion}";
        var SettingsFileName = $"Settings{fileNamePostfix}.json";

        var settingsPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), AppDataDirectoryName);
        Directory.CreateDirectory(settingsPath);
        settingsPath = Path.Combine(settingsPath, SettingsFileName);

        return settingsPath;
    }

    private static void MigrateLegacySettings(string settingsPath)
    {
        // Try load legacy config file
        if (!File.Exists(settingsPath) || JsonConvert.DeserializeObject<AppConfig>(File.ReadAllText(settingsPath)) is not AppConfig legacyConfig)
            return;

        // Migrate
        var newConfig = Settings.Get<AppConfig>();
        newConfig.LastMinecraftProfilePath = legacyConfig.LastMinecraftProfilePath;
        newConfig.LastConfigFilePath = legacyConfig.LastConfigFilePath;

        // Ensure save settings
        settingsManager.Save();

        // Delete legacy config file
        File.Delete(settingsPath);
    }
}