Added playlist renaming functionality.

Harmonia.WinUI/Messaging/IMessageService.cs

@@ -5,4 +5,5 @@ namespace Harmonia.WinUI.Messaging;
 public interface IMessageService
 {
     Task<bool> ConfirmAsync(string title, string message);
+    Task<string> InputTextAsync(string title, string message, string defaultText = "");
 }

Harmonia.WinUI/Messaging/WindowsMessageService.cs

@@ -27,4 +27,44 @@ public class WindowsMessageService : IMessageService
 
         return result == ContentDialogResult.Primary;
     }
+
+    public async Task<string> InputTextAsync(string title, string message, string defaultText = "")
+    {
+        TextBox inputTextBox = new()
+        {
+            Text = defaultText,
+            Margin = new Thickness(0, 10, 0, 0)
+        };
+
+        inputTextBox.SelectAll();
+
+        ContentDialog dialog = new()
+        {
+            XamlRoot = MainWindow.Content.XamlRoot,
+            Style = Application.Current.Resources["DefaultContentDialogStyle"] as Style,
+            Title = title,
+            Content = new StackPanel
+            {
+                Children =
+                {
+                    new TextBlock { Text = message },
+                    inputTextBox
+                }
+            },
+            PrimaryButtonText = "OK",
+            CloseButtonText = "Cancel",
+            DefaultButton = ContentDialogButton.Primary
+        };
+
+        ContentDialogResult result = await dialog.ShowAsync();
+
+        if (result == ContentDialogResult.Primary)
+        {
+            return inputTextBox.Text;
+        }
+        else
+        {
+            return string.Empty;
+        }
+    }
 }