add resource check

incorrect pass / hw handling in a loader

Azaion.LoaderUI/Login.xaml.cs

@@ -1,10 +1,15 @@
 using System.Diagnostics;
 using System.IO;
+using System.Text;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
+using System.Windows.Media;
+using MessagePack;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using NetMQ;
+using NetMQ.Sockets;
 
 
 namespace Azaion.LoaderUI;
@@ -23,17 +28,40 @@ public partial class Login
         InitializeComponent();
     }
 
+    private void SetControlsStatus(bool isLoading)
+    {
+        LoginBtn.IsEnabled = !isLoading;
+        TbEmail.IsEnabled = !isLoading;
+        TbPassword.IsEnabled = !isLoading;
+        LoginBtn.Cursor = isLoading ? Cursors.Wait : Cursors.Arrow;
+        Cursor = isLoading ? Cursors.Wait : Cursors.Arrow;
+    }
+
     private async void LoginClick(object sender, RoutedEventArgs e)
     {
-        var creds = new ApiCredentials(TbEmail.Text, TbPassword.Password);
+        var creds = new ApiCredentials
+        {
+            Email = TbEmail.Text,
+            Password = TbPassword.Password
+        };
         if (!creds.IsValid())
             return;
 
-        LoginBtn.Cursor = Cursors.Wait;
-        Cursor = Cursors.Wait;
-
+        SetControlsStatus(isLoading: true);
         _azaionApi.Login(creds);
-
+        try
+        {
+            Validate(creds);
+        }
+        catch (Exception exception)
+        {
+            _logger.LogError(exception, exception.Message);
+            TbStatus.Foreground = Brushes.Red;
+            TbStatus.Text = exception.Message;
+            SetControlsStatus(isLoading: false);
+            return;
+        }
+        TbStatus.Foreground = Brushes.Black;
         var installerVersion = await GetInstallerVer();
         var localVersion = GetLocalVer();
 
@@ -44,12 +72,81 @@ public partial class Login
             TbStatus.Text = $"Installed {installerVersion}!";
         }
         else
-            TbStatus.Text = $"Your version is up to date!";
+            TbStatus.Text = "Your version is up to date!";
 
         Process.Start(Constants.AZAION_SUITE_EXE, $"-e {creds.Email} -p {creds.Password}");
+        await Task.Delay(800);
+        TbStatus.Text = "Loading...";
+        while (!Process.GetProcessesByName(Constants.INFERENCE_EXE).Any())
+            await Task.Delay(500);
+        await Task.Delay(500);
         Close();
     }
 
+    private void Validate(ApiCredentials creds)
+    {
+        var dealer = new DealerSocket();
+        try
+        {
+            using var process = new Process();
+            process.StartInfo = new ProcessStartInfo
+            {
+                FileName = Constants.EXTERNAL_LOADER_PATH,
+                Arguments = $"--port {Constants.EXTERNAL_LOADER_PORT} --api {Constants.API_URL}",
+                CreateNoWindow = true
+            };
+            process.Start();
+            dealer.Options.Identity = Encoding.UTF8.GetBytes(Guid.NewGuid().ToString("N"));
+            dealer.Connect($"tcp://{Constants.EXTERNAL_LOADER_HOST}:{Constants.EXTERNAL_LOADER_PORT}");
+
+            var result = SendCommand(dealer, RemoteCommand.Create(CommandType.Login, creds));
+            if (result.CommandType != CommandType.Ok)
+                throw new Exception(result.Message);
+
+            result = SendCommand(dealer, RemoteCommand.Create(CommandType.CheckResource));
+            if (result.CommandType != CommandType.Ok)
+                throw new Exception(result.Message);
+        }
+        catch (Exception e)
+        {
+            _logger.LogError(e, e.Message);
+            throw;
+        }
+        finally
+        {
+            SendCommand(dealer, RemoteCommand.Create(CommandType.Exit));
+            dealer.Close();
+            dealer.Dispose();
+        }
+    }
+
+    private RemoteCommand SendCommand(DealerSocket dealer, RemoteCommand command, int retryCount = 30, int retryDelayMs = 800)
+    {
+        try
+        {
+            dealer.SendFrame(MessagePackSerializer.Serialize(command));
+
+            var tryNum = 0;
+            while (tryNum++ < retryCount)
+            {
+                if (!dealer.TryReceiveFrameBytes(TimeSpan.FromMilliseconds(retryDelayMs), out var bytes))
+                    continue;
+                var res = MessagePackSerializer.Deserialize<RemoteCommand>(bytes);
+                if (res.CommandType == CommandType.Error)
+                    throw new Exception(res.Message);
+                return res;
+            }
+
+            throw new Exception($"Sent {command} {retryCount} times, with wait time {retryDelayMs}ms for each call. No response from client.");
+        }
+        catch (Exception e)
+        {
+            _logger.LogError(e, e.Message);
+            throw;
+        }
+    }
+
+
     private async Task DownloadAndRunInstaller()
     {
         var (installerName, stream) = await _azaionApi.DownloadInstaller(_dirConfig?.SuiteInstallerDirectory ?? "");
@@ -65,6 +162,7 @@ public partial class Login
 
         var process = Process.Start(processInfo);
         await process!.WaitForExitAsync();
+        File.Delete(installerName);
     }
 
     private async Task<Version> GetInstallerVer()