Initial commit

MathInterpreter/MainWindow.axaml.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Globalization;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using MathInterpreter.Core;
+using MsBox.Avalonia;
+using MsBox.Avalonia.Base;
+using MsBox.Avalonia.Enums;
+
+namespace MathInterpreter;
+
+public partial class MainWindow : Window
+{
+    public MainWindow()
+    {
+        InitializeComponent();
+        DataContext = this;
+    }
+    
+
+    private async void Calculate(object sender, RoutedEventArgs e)
+    {
+        try
+        {
+            string input = ExpressionInput.Text ?? throw new InvalidOperationException("Input must not be empty");
+            var expression = new MathExpression(input);
+            Result.Text = expression.Result.ToString(CultureInfo.InvariantCulture);
+        }
+        catch (Exception ex)
+        {
+            string exStr = UnwrapException(ex);
+            await ShowError(exStr);
+        }
+    }
+
+    private static string UnwrapException(Exception exception)
+    {
+        string message = exception.Message;
+
+        if (exception.InnerException != null)
+        {
+            message += $"{Environment.NewLine}Inner exception: {UnwrapException(exception.InnerException)}";
+        }
+
+        return message;
+    }
+
+    private static async ValueTask ShowError(string message)
+    {
+        IMsBox<ButtonResult> box = MessageBoxManager.GetMessageBoxStandard("Error", message);
+        await box.ShowAsync();
+    }
+}