Fix resolved type for Trailers

Emby.Server.Implementations/Library/Resolvers/GenericVideoResolver.cs

@@ -1,18 +0,0 @@
-#nullable disable
-
-#pragma warning disable CS1591
-
-using Emby.Naming.Common;
-using MediaBrowser.Controller.Entities;
-
-namespace Emby.Server.Implementations.Library.Resolvers
-{
-    public class GenericVideoResolver<T> : BaseVideoResolver<T>
-        where T : Video, new()
-    {
-        public GenericVideoResolver(NamingOptions namingOptions)
-            : base(namingOptions)
-        {
-        }
-    }
-}

Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs

@@ -105,10 +105,9 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
 
                 if (string.IsNullOrEmpty(collectionType))
                 {
-                    // Owned items will be caught by the plain video resolver
+                    // Owned items will be caught by the video extra resolver
                     if (args.Parent == null)
                     {
-                        // return FindMovie<Video>(args.Path, args.Parent, files, args.DirectoryService, collectionType);
                         return null;
                     }
 
@@ -129,10 +128,10 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 return movie?.ExtraType == null ? movie : null;
             }
 
-            // Handle owned items
+            // Owned items will be caught by the video extra resolver
             if (args.Parent == null)
             {
-                return base.Resolve(args);
+                return null;
             }
 
             if (IsInvalid(args.Parent, collectionType))

Emby.Server.Implementations/Library/Resolvers/VideoExtraResolver.cs

@@ -0,0 +1,55 @@
+#nullable disable
+
+using Emby.Naming.Common;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Resolvers;
+using MediaBrowser.Model.Entities;
+
+namespace Emby.Server.Implementations.Library.Resolvers
+{
+    /// <summary>
+    /// Resolves a Path into a Video or Video subclass.
+    /// </summary>
+    public class VideoExtraResolver : BaseVideoResolver<Video>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VideoExtraResolver"/> class.
+        /// </summary>
+        /// <param name="namingOptions">The naming options.</param>
+        public VideoExtraResolver(NamingOptions namingOptions)
+            : base(namingOptions)
+        {
+        }
+
+        /// <summary>
+        /// Gets the priority.
+        /// </summary>
+        /// <value>The priority.</value>
+        public override ResolverPriority Priority => ResolverPriority.Last;
+
+        /// <summary>
+        /// Resolves the specified args.
+        /// </summary>
+        /// <param name="args">The args.</param>
+        /// <returns>The video extra or null if not handled by this resolver.</returns>
+        public override Video Resolve(ItemResolveArgs args)
+        {
+            // Only handle owned items
+            if (args.Parent != null)
+            {
+                return null;
+            }
+
+            var ownedItem = base.Resolve(args);
+
+            // Re-resolve items that have their own type
+            if (ownedItem.ExtraType == ExtraType.Trailer)
+            {
+                ownedItem = ResolveVideo<Trailer>(args, false);
+            }
+
+            return ownedItem;
+        }
+    }
+}

tests/Jellyfin.Server.Implementations.Tests/Library/LibraryManager/FindExtrasTests.cs

@@ -36,7 +36,7 @@ public class FindExtrasTests
         _fileSystemMock.Setup(f => f.GetFileInfo(It.IsAny<string>())).Returns<string>(path => new FileSystemMetadata { FullName = path });
         _libraryManager = fixture.Build<Emby.Server.Implementations.Library.LibraryManager>().Do(s => s.AddParts(
                 fixture.Create<IEnumerable<IResolverIgnoreRule>>(),
-                new List<IItemResolver> { new GenericVideoResolver<Video>(fixture.Create<NamingOptions>()), new AudioResolver(fixture.Create<NamingOptions>()) },
+                new List<IItemResolver> { new VideoExtraResolver(fixture.Create<NamingOptions>()), new AudioResolver(fixture.Create<NamingOptions>()) },
                 fixture.Create<IEnumerable<IIntroProvider>>(),
                 fixture.Create<IEnumerable<IBaseItemComparer>>(),
                 fixture.Create<IEnumerable<ILibraryPostScanTask>>()))
@@ -69,6 +69,7 @@ public class FindExtrasTests
 
         Assert.Equal(2, extras.Count);
         Assert.Equal(ExtraType.Trailer, extras[0].ExtraType);
+        Assert.Equal(typeof(Trailer), extras[0].GetType());
         Assert.Equal(ExtraType.Sample, extras[1].ExtraType);
     }
 
@@ -146,7 +147,9 @@ public class FindExtrasTests
 
         Assert.Equal(6, extras.Count);
         Assert.Equal(ExtraType.Trailer, extras[0].ExtraType);
+        Assert.Equal(typeof(Trailer), extras[0].GetType());
         Assert.Equal(ExtraType.Trailer, extras[1].ExtraType);
+        Assert.Equal(typeof(Trailer), extras[1].GetType());
         Assert.Equal(ExtraType.BehindTheScenes, extras[2].ExtraType);
         Assert.Equal(ExtraType.Sample, extras[3].ExtraType);
         Assert.Equal(ExtraType.ThemeSong, extras[4].ExtraType);
@@ -174,6 +177,7 @@ public class FindExtrasTests
 
         Assert.Single(extras);
         Assert.Equal(ExtraType.Trailer, extras[0].ExtraType);
+        Assert.Equal(typeof(Trailer), extras[0].GetType());
         Assert.Equal("trailer", extras[0].FileNameWithoutExtension);
         Assert.Equal("/movies/Up/trailer.mkv", extras[0].Path);
     }
@@ -200,6 +204,7 @@ public class FindExtrasTests
 
         Assert.Single(extras);
         Assert.Equal(ExtraType.Trailer, extras[0].ExtraType);
+        Assert.Equal(typeof(Trailer), extras[0].GetType());
         Assert.Equal("trailer", extras[0].FileNameWithoutExtension);
         Assert.Equal("/movies/Up/trailer.mkv", extras[0].Path);
     }
@@ -225,6 +230,7 @@ public class FindExtrasTests
 
         Assert.Equal(2, extras.Count);
         Assert.Equal(ExtraType.Trailer, extras[0].ExtraType);
+        Assert.Equal(typeof(Trailer), extras[0].GetType());
         Assert.Equal("trailer", extras[0].FileNameWithoutExtension);
         Assert.Equal("/series/Dexter/trailer.mkv", extras[0].Path);
         Assert.Equal("/series/Dexter/trailers/trailer2.mkv", extras[1].Path);