check installer correctly

Azaion.LoaderUI/AzaionApi.cs

@@ -11,7 +11,7 @@ public interface IAzaionApi
 {
     void Login(ApiCredentials credentials);
     Task<string> GetLastInstallerName(string folder);
-    Task<(string name, Stream stream)> DownloadInstaller(string folder);
+    Task<(string name, Stream stream)> DownloadInstaller(bool isStage = false);
 }
 
 public class AzaionApi(HttpClient client) : IAzaionApi
@@ -31,9 +31,9 @@ public class AzaionApi(HttpClient client) : IAzaionApi
         return res?.FirstOrDefault() ?? "";
     }
 
-    public async Task<(string name, Stream stream)> DownloadInstaller(string folder)
+    public async Task<(string name, Stream stream)> DownloadInstaller(bool isStage = false)
     {
-        var response = await Send(new HttpRequestMessage(HttpMethod.Get, $"resources/get-installer/{folder}"));
+        var response = await Send(new HttpRequestMessage(HttpMethod.Get, $"resources/get-installer/{isStage}"));
         var fileStream = await response.Content.ReadAsStreamAsync();
         var fileName = response.Content.Headers.ContentDisposition?.FileName?.Trim('"') ?? "installer.exe";
         return (fileName, fileStream);

Azaion.LoaderUI/ConstantsLoader.cs

@@ -3,5 +3,6 @@ namespace Azaion.LoaderUI;
 public static class ConstantsLoader
 {
     public const string SUITE_FOLDER = "suite";
+    public const string SUITE_STAGE_FOLDER = "suite-stage";
     public const int    EXTERNAL_LOADER_PORT = 5020;
 }

Azaion.LoaderUI/LoaderConfig.cs

@@ -2,5 +2,5 @@ namespace Azaion.LoaderUI;
 
 public class DirectoriesConfig
 {
-    public string SuiteInstallerDirectory {get;set;} = null!;
+    public bool IsStage { get; set; } = false;
 }

Azaion.LoaderUI/Login.xaml.cs

@@ -63,7 +63,7 @@ public partial class Login
             if (installerVersion > localVersion)
             {
                 TbStatus.Text = $"Updating from {localVersion} to {installerVersion}...";
-                var (installerName, stream) = await _azaionApi.DownloadInstaller(_dirConfig?.SuiteInstallerDirectory ?? "");
+                var (installerName, stream) = await _azaionApi.DownloadInstaller(_dirConfig?.IsStage ?? false);
                 var localFileStream = new FileStream(installerName, FileMode.Create, FileAccess.Write);
                 await stream.CopyToAsync(localFileStream);
                 localFileStream.Close();
@@ -164,9 +164,10 @@ public partial class Login
     private async Task<Version?> GetInstallerVer()
     {
         TbStatus.Text = "Checking for the newer version...";
-        var installerDir = string.IsNullOrWhiteSpace(_dirConfig?.SuiteInstallerDirectory)
+        var installerDir = _dirConfig?.IsStage ?? false
             ? ConstantsLoader.SUITE_FOLDER
-            : _dirConfig.SuiteInstallerDirectory;
+            : ConstantsLoader.SUITE_STAGE_FOLDER;
+
         var installerName = await _azaionApi.GetLastInstallerName(installerDir);
         try
         {

Azaion.LoaderUI/loaderconfig.prod.json

@@ -1,6 +1,6 @@
 {
   "DirectoriesConfig":
   {
-    "SuiteInstallerDirectory": null
+    "IsStage": false
   }
 }

Azaion.LoaderUI/loaderconfig.stage.json

@@ -1,6 +1,6 @@
 {
   "DirectoriesConfig":
   {
-    "SuiteInstallerDirectory": "suite-stage"
+    "IsStage": true
   }
 }