migrate settings

ModpackUpdater/Program.cs

@@ -1,10 +1,22 @@
-using Telerik.WinControls;
+using Newtonsoft.Json;
+using Pilz.Configuration;
+using Telerik.WinControls;
 
 namespace ModpackUpdater;
 
-internal static class Program
+public static class Program
 {
-    public static void Main(string[] args)
+    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);
@@ -15,4 +27,35 @@ internal static class Program
 
         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);
+    }
 }