Adding a sign for protected tree documents.

Author: NillasKA

src/Umbraco.Cms.Api.Management/DependencyInjection/UmbracoBuilder.Collections.cs

@@ -11,7 +11,8 @@ public static partial class UmbracoBuilderExtensions
         internal static void AddCollectionBuilders(this IUmbracoBuilder builder)
         {
             builder.SignProviders()
-                .Append<HasScheduleSignProvider>();
+                .Append<HasScheduleSignProvider>()
+                .Append<IsProtectedSignProvider>();
         }
 
         /// <summary>

src/Umbraco.Cms.Api.Management/Services/Signs/IsProtectedSignProvider.cs

@@ -0,0 +1,27 @@
+using Umbraco.Cms.Api.Management.ViewModels.Tree;
+using Umbraco.Cms.Core.Models.Entities;
+
+namespace Umbraco.Cms.Api.Management.Services.Signs;
+
+internal class IsProtectedSignProvider : ISignProvider
+{
+    private const string Alias = ISignProvider.Prefix + "IsProtected";
+
+    /// <inheritdoc/>>
+    public bool CanProvideTreeSigns<TItem>() => typeof(TItem) == typeof(DocumentTreeItemResponseModel);
+
+    /// <inheritdoc/>>
+    public Task PopulateTreeSignsAsync<TItem>(TItem[] treeItemViewModels, IEnumerable<IEntitySlim> entities)
+        where TItem : EntityTreeItemResponseModel, new()
+    {
+        foreach (TItem item in treeItemViewModels)
+        {
+            if (item is DocumentTreeItemResponseModel { IsProtected: true })
+            {
+                item.AddSign(Alias);
+            }
+        }
+
+        return Task.CompletedTask;
+    }
+}