Fix SortCriteria and refactor SetSorting

Emby.Dlna/ContentDirectory/ControlHandler.cs

@@ -634,11 +634,10 @@ namespace Emby.Dlna.ContentDirectory
                 IsVirtualItem = false,
                 ExcludeItemTypes = new[] { nameof(Book) },
                 IsPlaceHolder = false,
-                DtoOptions = GetDtoOptions()
+                DtoOptions = GetDtoOptions(),
+                OrderBy = GetOrderBy(sort, folder.IsPreSorted)
             };
 
-            SetSorting(query, sort, folder.IsPreSorted);
-
             var queryResult = folder.GetItems(query);
 
             return ToResult(queryResult);
@@ -658,11 +657,10 @@ namespace Emby.Dlna.ContentDirectory
             {
                 StartIndex = startIndex,
                 Limit = limit,
-                IncludeItemTypes = new[] { nameof(LiveTvChannel) }
+                IncludeItemTypes = new[] { nameof(LiveTvChannel) },
+                OrderBy = GetOrderBy(sort, false)
             };
 
-            SetSorting(query, sort, false);
-
             var result = _libraryManager.GetItemsResult(query);
 
             return ToResult(result);
@@ -683,9 +681,9 @@ namespace Emby.Dlna.ContentDirectory
             var query = new InternalItemsQuery(user)
             {
                 StartIndex = startIndex,
-                Limit = limit
+                Limit = limit,
+                OrderBy = GetOrderBy(sort, false)
             };
-            SetSorting(query, sort, false);
 
             switch (stubType)
             {
@@ -752,9 +750,9 @@ namespace Emby.Dlna.ContentDirectory
             var query = new InternalItemsQuery(user)
             {
                 StartIndex = startIndex,
-                Limit = limit
+                Limit = limit,
+                OrderBy = GetOrderBy(sort, false)
             };
-            SetSorting(query, sort, false);
 
             switch (stubType)
             {
@@ -835,9 +833,9 @@ namespace Emby.Dlna.ContentDirectory
             var query = new InternalItemsQuery(user)
             {
                 StartIndex = startIndex,
-                Limit = limit
+                Limit = limit,
+                OrderBy = GetOrderBy(sort, false)
             };
-            SetSorting(query, sort, false);
 
             switch (stubType)
             {
@@ -1104,11 +1102,10 @@ namespace Emby.Dlna.ContentDirectory
                 IncludeItemTypes = new[] { nameof(MusicAlbum) },
                 Limit = limit,
                 StartIndex = startIndex,
-                DtoOptions = GetDtoOptions()
+                DtoOptions = GetDtoOptions(),
+                OrderBy = GetOrderBy(sort, false)
             };
 
-            SetSorting(query, sort, false);
-
             var result = _libraryManager.GetItemsResult(query);
 
             return ToResult(result);
@@ -1136,11 +1133,10 @@ namespace Emby.Dlna.ContentDirectory
                 },
                 Limit = limit,
                 StartIndex = startIndex,
-                DtoOptions = GetDtoOptions()
+                DtoOptions = GetDtoOptions(),
+                OrderBy = GetOrderBy(sort, false)
             };
 
-            SetSorting(query, sort, false);
-
             var result = _libraryManager.GetItemsResult(query);
 
             return ToResult(result);
@@ -1164,11 +1160,10 @@ namespace Emby.Dlna.ContentDirectory
                 IncludeItemTypes = new[] { nameof(MusicAlbum) },
                 Limit = limit,
                 StartIndex = startIndex,
-                DtoOptions = GetDtoOptions()
+                DtoOptions = GetDtoOptions(),
+                OrderBy = GetOrderBy(sort, false)
             };
 
-            SetSorting(query, sort, false);
-
             var result = _libraryManager.GetItemsResult(query);
 
             return ToResult(result);
@@ -1233,21 +1228,13 @@ namespace Emby.Dlna.ContentDirectory
         }
 
         /// <summary>
-        /// Sets the sorting method on a query.
+        /// Gets the sorting method on a query.
         /// </summary>
-        /// <param name="query">The <see cref="InternalItemsQuery"/>.</param>
         /// <param name="sort">The <see cref="SortCriteria"/>.</param>
         /// <param name="isPreSorted">True if pre-sorted.</param>
-        private static void SetSorting(InternalItemsQuery query, SortCriteria sort, bool isPreSorted)
+        private static (string, SortOrder)[] GetOrderBy(SortCriteria sort, bool isPreSorted)
         {
-            if (isPreSorted)
-            {
-                query.OrderBy = Array.Empty<(string, SortOrder)>();
-            }
-            else
-            {
-                query.OrderBy = new[] { (ItemSortBy.SortName, sort.SortOrder) };
-            }
+            return isPreSorted ? Array.Empty<(string, SortOrder)>() : new[] { (ItemSortBy.SortName, sort.SortOrder) };
         }
 
         /// <summary>

MediaBrowser.Model/Dlna/SortCriteria.cs

@@ -1,15 +1,24 @@
 #pragma warning disable CS1591
 
+using System;
 using Jellyfin.Data.Enums;
 
 namespace MediaBrowser.Model.Dlna
 {
     public class SortCriteria
     {
-        public SortCriteria(string value)
+        public SortCriteria(string sortOrder)
         {
+            if (!string.IsNullOrEmpty(sortOrder) && Enum.TryParse<SortOrder>(sortOrder, true, out var sortOrderValue))
+            {
+                SortOrder = sortOrderValue;
+            }
+            else
+            {
+                SortOrder = SortOrder.Ascending;
+            }
         }
 
-        public SortOrder SortOrder => SortOrder.Ascending;
+        public SortOrder SortOrder { get; }
     }
 }