Stub

Wino.Mail.WinUI/Selectors/MailItemContainerSelector.cs

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+using System;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Wino.Mail.ViewModels.Collections;
+using Wino.Mail.ViewModels.Data;
+
+namespace Wino.Mail.WinUI.Selectors;
+
+public partial class MailItemContainerSelector : DataTemplateSelector
+{
+    public DataTemplate? EmailTemplate { get; set; }
+    public DataTemplate? ThreadExpanderTemplate { get; set; }
+    public DataTemplate? DateGroupHeaderTemplate { get; set; }
+    public DataTemplate? SenderGroupHeaderTemplate { get; set; }
+
+    protected override DataTemplate SelectTemplateCore(object item)
+    {
+        return item switch
+        {
+            MailItemViewModel => EmailTemplate ?? throw new ArgumentNullException(nameof(EmailTemplate)),
+            ThreadMailItemViewModel => ThreadExpanderTemplate ?? throw new ArgumentNullException(nameof(ThreadExpanderTemplate)),
+            DateGroupHeader => DateGroupHeaderTemplate ?? throw new ArgumentNullException(nameof(DateGroupHeaderTemplate)),
+            SenderGroupHeader => SenderGroupHeaderTemplate ?? throw new ArgumentNullException(nameof(SenderGroupHeaderTemplate)),
+            _ => base.SelectTemplateCore(item)
+        };
+    }
+}