- add: TFA think

Nebula.Launcher/Views/Popup/TfaView.axaml.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using Avalonia.Markup.Xaml;
+using Nebula.Launcher.ViewModels.Popup;
+
+namespace Nebula.Launcher.Views.Popup;
+
+public partial class TfaView : UserControl
+{
+    public List<TextBox> Boxes = new();
+    
+    public TfaView()
+    {
+        InitializeComponent();
+
+        foreach (var textBox in TContainer.Children.Select(UnzipBox))
+        {
+            var currIndex = Boxes.Count;
+            Boxes.Add(textBox);
+            textBox.TextChanged += (_,_) => OnTextChanged(currIndex);
+            textBox.PastingFromClipboard += OnPasteFromClipboard;
+            textBox.KeyUp += (sender, args) =>
+            {
+                if (args.Key == Key.Back && string.IsNullOrEmpty(textBox.Text)) OnTextChanged(currIndex);
+            };
+            textBox.KeyDown += (sender, args) =>
+            {
+                textBox.Text = args.KeySymbol;
+                textBox.SelectionStart = 1;
+                //OnTextChanged(currIndex);
+            };
+        }
+    }
+
+    private void OnPasteFromClipboard(object? sender, RoutedEventArgs e)
+    {
+        // TODO: CLIPBOARD THINK
+    }
+
+    private void OnTextChanged(int index)
+    {
+        var box = Boxes[index];
+
+        if (string.IsNullOrEmpty(box.Text))
+        {
+            if(index == 0) return;
+            index--;
+        }
+        else
+        {
+            if(!int.TryParse(box.Text, out var _))
+            {
+                box.Text = "";
+                return;
+            }
+            
+            if (index == 5)
+            {
+                CheckupCode();
+                return;
+            }
+            index++;
+        }
+
+        Boxes[index].Focus();
+    }
+
+    private void CheckupCode()
+    {
+        var str = "";
+        foreach (var vtTextBox in Boxes)
+        {
+            if(string.IsNullOrEmpty(vtTextBox.Text)) return;
+            str += vtTextBox.Text;
+        }
+        
+        ((TfaViewModel)DataContext!).OnTfaEnter(str);
+    }
+    
+    private TextBox UnzipBox(Control control)
+    {
+        var box = (Border)control;
+        return (TextBox)box.Child!;
+    }
+
+    public TfaView(TfaViewModel tfaViewModel) : this()
+    {
+        DataContext = tfaViewModel;
+    }
+
+    private void Button_OnClick(object? sender, RoutedEventArgs e)
+    {
+        CheckupCode();
+    }
+}