Add async get method to content editing service

src/Umbraco.Cms.Api.Management/Controllers/Document/ByKeyDocumentController.cs

@@ -9,12 +9,12 @@ namespace Umbraco.Cms.Api.Management.Controllers.Document;
 
 public class ByKeyDocumentController : DocumentControllerBase
 {
-    private readonly IContentService _contentService;
+    private readonly IContentEditingService _contentEditingService;
     private readonly IDocumentViewModelFactory _documentViewModelFactory;
 
-    public ByKeyDocumentController(IContentService contentService, IDocumentViewModelFactory documentViewModelFactory)
+    public ByKeyDocumentController(IContentEditingService contentEditingService, IDocumentViewModelFactory documentViewModelFactory)
     {
-        _contentService = contentService;
+        _contentEditingService = contentEditingService;
         _documentViewModelFactory = documentViewModelFactory;
     }
 
@@ -24,8 +24,7 @@ public class ByKeyDocumentController : DocumentControllerBase
     [ProducesResponseType(StatusCodes.Status404NotFound)]
     public async Task<IActionResult> ByKey(Guid key)
     {
-        // FIXME: create and use an async get method here.
-        IContent? content = _contentService.GetById(key);
+        IContent? content = await _contentEditingService.GetAsync(key);
         if (content == null)
         {
             return NotFound();

src/Umbraco.Core/Services/ContentEditingService.cs

@@ -29,6 +29,12 @@ internal sealed class ContentEditingService
         _scopeProvider = scopeProvider;
     }
 
+    public async Task<IContent?> GetAsync(Guid id)
+    {
+        IContent? content = ContentService.GetById(id);
+        return await Task.FromResult(content);
+    }
+
     public async Task<Attempt<IContent?, ContentEditingOperationStatus>> CreateAsync(ContentCreateModel createModel, int userId)
     {
         Attempt<IContent?, ContentEditingOperationStatus> result = await MapCreate(createModel);

src/Umbraco.Core/Services/IContentEditingService.cs

@@ -6,6 +6,8 @@ namespace Umbraco.Cms.Core.Services;
 
 public interface IContentEditingService
 {
+    Task<IContent?> GetAsync(Guid id);
+
     Task<Attempt<IContent?, ContentEditingOperationStatus>> CreateAsync(ContentCreateModel createModel, int userId);
 
     Task<Attempt<IContent, ContentEditingOperationStatus>> UpdateAsync(IContent content, ContentUpdateModel updateMode, int userId);