Refactor. Add data layer

BudgetApp/Components/ToastValidator.razor.cs

@@ -0,0 +1,48 @@
+using BudgetApp.Services;
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Forms;
+
+namespace BudgetApp.Components;
+
+public partial class ToastValidator
+{
+    [CascadingParameter] private EditContext? CurrentEditContext { get; set; }
+
+    [Inject] private ToastService ToastService { get; set; } = default!;
+
+    private bool _validationRequested;
+
+    protected override void OnInitialized()
+    {
+        if (CurrentEditContext is not null)
+        {
+            CurrentEditContext.OnValidationRequested += OnValidationRequested;
+            CurrentEditContext.OnValidationStateChanged += OnValidationStateChanged;
+        }
+    }
+
+    private void OnValidationRequested(object? sender, ValidationRequestedEventArgs e)
+    {
+        _validationRequested = true;
+    }
+
+    private void OnValidationStateChanged(object? sender, ValidationStateChangedEventArgs e)
+    {
+        if (!_validationRequested || CurrentEditContext is null) return;
+        _validationRequested = false;
+
+        foreach (var message in CurrentEditContext.GetValidationMessages())
+        {
+            ToastService.Show(message);
+        }
+    }
+
+    public void Dispose()
+    {
+        if (CurrentEditContext is not null)
+        {
+            CurrentEditContext.OnValidationRequested -= OnValidationRequested;
+            CurrentEditContext.OnValidationStateChanged -= OnValidationStateChanged;
+        }
+    }
+}