Fixed a file system issue and also added a few more performance tweaks

MediaBrowser.Controller/Events/ItemResolveEventArgs.cs

@@ -1,8 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using MediaBrowser.Model.Entities;
 using MediaBrowser.Controller.IO;
+using MediaBrowser.Model.Entities;
 
 namespace MediaBrowser.Controller.Events
 {
@@ -15,15 +15,17 @@ namespace MediaBrowser.Controller.Events
 
         public KeyValuePair<string, WIN32_FIND_DATA>? GetFileSystemEntry(string path, bool? isFolder)
         {
-            foreach (KeyValuePair<string, WIN32_FIND_DATA> entry in FileSystemChildren)
+            for (int i = 0; i < FileSystemChildren.Length; i++)
             {
+                KeyValuePair<string, WIN32_FIND_DATA> entry = FileSystemChildren[i];
+
                 if (isFolder.HasValue)
                 {
-                    if (isFolder.Value && entry.Value.IsDirectory)
+                    if (isFolder.Value && !entry.Value.IsDirectory)
                     {
                         continue;
                     }
-                    else if (!isFolder.Value && !entry.Value.IsDirectory)
+                    else if (!isFolder.Value && entry.Value.IsDirectory)
                     {
                         continue;
                     }
@@ -40,15 +42,17 @@ namespace MediaBrowser.Controller.Events
         
         public KeyValuePair<string, WIN32_FIND_DATA>? GetFileSystemEntryByName(string name, bool? isFolder)
         {
-            foreach (KeyValuePair<string, WIN32_FIND_DATA> entry in FileSystemChildren)
+            for (int i = 0; i < FileSystemChildren.Length; i++)
             {
+                KeyValuePair<string, WIN32_FIND_DATA> entry = FileSystemChildren[i];
+
                 if (isFolder.HasValue)
                 {
-                    if (isFolder.Value && entry.Value.IsDirectory)
+                    if (isFolder.Value && !entry.Value.IsDirectory)
                     {
                         continue;
                     }
-                    else if (!isFolder.Value && !entry.Value.IsDirectory)
+                    else if (!isFolder.Value && entry.Value.IsDirectory)
                     {
                         continue;
                     }

MediaBrowser.Controller/Providers/ImageFromMediaLocationProvider.cs

@@ -2,11 +2,9 @@
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.IO;
-using System.Linq;
 using System.Threading.Tasks;
 using MediaBrowser.Controller.Events;
 using MediaBrowser.Model.Entities;
-using MediaBrowser.Controller.IO;
 
 namespace MediaBrowser.Controller.Providers
 {
@@ -48,8 +46,10 @@ namespace MediaBrowser.Controller.Providers
         /// </summary>
         private void PopulateImages(BaseEntity item, ItemResolveEventArgs args)
         {
-            foreach (KeyValuePair<string, WIN32_FIND_DATA> file in args.FileSystemChildren)
+            for (int i = 0; i < args.FileSystemChildren.Length; i++)
             {
+                var file = args.FileSystemChildren[i];
+                
                 if (file.Value.IsDirectory)
                 {
                     continue;
@@ -81,8 +81,10 @@ namespace MediaBrowser.Controller.Providers
         {
             List<string> backdropFiles = new List<string>();
 
-            foreach (KeyValuePair<string, WIN32_FIND_DATA> file in args.FileSystemChildren)
+            for (int i = 0; i < args.FileSystemChildren.Length; i++)
             {
+                var file = args.FileSystemChildren[i];
+
                 if (file.Value.IsDirectory)
                 {
                     continue;
@@ -126,7 +128,7 @@ namespace MediaBrowser.Controller.Providers
                 }
             }
 
-            if (backdropFiles.Any())
+            if (backdropFiles.Count > 0)
             {
                 item.BackdropImagePaths = backdropFiles;
             }

MediaBrowser.Controller/Providers/LocalTrailerProvider.cs

@@ -32,8 +32,10 @@ namespace MediaBrowser.Controller.Providers
 
                 List<Video> localTrailers = new List<Video>();
 
-                foreach (string file in allFiles)
+                for (int i = 0; i < allFiles.Length; i++)
                 {
+                    string file = allFiles[i];
+
                     BaseItem child = await Kernel.Instance.ItemController.GetItem(file).ConfigureAwait(false);
 
                     Video video = child as Video;

MediaBrowser.Controller/Resolvers/VideoResolver.cs

@@ -1,8 +1,6 @@
-using System.Collections.Generic;
+using System.ComponentModel.Composition;
-using System.ComponentModel.Composition;
 using System.IO;
 using MediaBrowser.Controller.Events;
-using MediaBrowser.Controller.IO;
 using MediaBrowser.Model.Entities;
 
 namespace MediaBrowser.Controller.Resolvers
@@ -51,8 +49,10 @@ namespace MediaBrowser.Controller.Resolvers
                 }
 
                 // Also check the subfolders for bluray or dvd
-                foreach (KeyValuePair<string, WIN32_FIND_DATA> folder in args.FileSystemChildren)
+                for (int i = 0; i < args.FileSystemChildren.Length; i++)
                 {
+                    var folder = args.FileSystemChildren[i];
+
                     if (!folder.Value.IsDirectory)
                     {
                         continue;

MediaBrowser.Movies/Resolvers/MovieResolver.cs

@@ -19,12 +19,6 @@ namespace MediaBrowser.Movies.Resolvers
         {
             if (args.IsFolder && (args.VirtualFolderCollectionType ?? string.Empty).Equals("Movies", StringComparison.OrdinalIgnoreCase))
             {
-                // Optimization to avoid running these tests against VF's
-                if (args.Parent != null && args.Parent.IsRoot)
-                {
-                    return null;
-                }
-
                 var metadataFile = args.GetFileSystemEntryByName("movie.xml", false);
 
                 if (metadataFile.HasValue || Path.GetFileName(args.Path).IndexOf("[tmdbid=", StringComparison.OrdinalIgnoreCase) != -1)
@@ -53,8 +47,10 @@ namespace MediaBrowser.Movies.Resolvers
 
         private Movie GetMovie(ItemResolveEventArgs args)
         {
-            foreach (var child in args.FileSystemChildren)
+            for (var i = 0; i < args.FileSystemChildren.Length; i++)
             {
+                var child = args.FileSystemChildren[i];
+
                 ItemResolveEventArgs childArgs = new ItemResolveEventArgs()
                 {
                     Path = child.Key,

MediaBrowser.TV/Entities/Season.cs

@@ -1,5 +1,4 @@
-using System.Collections.Generic;
+using System;
-using System.Runtime.Serialization;
 using MediaBrowser.Model.Entities;
 
 namespace MediaBrowser.TV.Entities
@@ -9,6 +8,22 @@ namespace MediaBrowser.TV.Entities
         /// <summary>
         /// Store these to reduce disk access in Episode Resolver
         /// </summary>
-        internal IEnumerable<string> MetadataFiles { get; set; }
+        internal string[] MetadataFiles { get; set; }
+
+        /// <summary>
+        /// Determines if the metafolder contains a given file
+        /// </summary>
+        internal bool ContainsMetadataFile(string file)
+        {
+            for (int i = 0; i < MetadataFiles.Length; i++)
+            {
+                if (MetadataFiles[i].Equals(file, StringComparison.OrdinalIgnoreCase))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
     }
 }

MediaBrowser.TV/Providers/EpisodeImageFromMediaLocationProvider.cs

@@ -53,7 +53,7 @@ namespace MediaBrowser.TV.Providers
             }
             else
             {
-                item.PrimaryImagePath = imageFiles.FirstOrDefault(f => season.MetadataFiles.Any(s => s.Equals(f, StringComparison.OrdinalIgnoreCase)));
+                item.PrimaryImagePath = imageFiles.FirstOrDefault(f => season.ContainsMetadataFile(f));
             }
         }
     }

MediaBrowser.TV/Providers/EpisodeProviderFromXml.cs

@@ -1,7 +1,5 @@
-using System;
+using System.ComponentModel.Composition;
-using System.ComponentModel.Composition;
 using System.IO;
-using System.Linq;
 using System.Threading.Tasks;
 using MediaBrowser.Controller.Events;
 using MediaBrowser.Controller.Providers;
@@ -25,6 +23,8 @@ namespace MediaBrowser.TV.Providers
         }
 
         public async override Task Fetch(BaseEntity item, ItemResolveEventArgs args)
+        {
+            await Task.Run(() =>
             {
                 string metadataFolder = Path.Combine(args.Parent.Path, "metadata");
 
@@ -34,10 +34,12 @@ namespace MediaBrowser.TV.Providers
 
                 string metadataFile = Path.Combine(metadataFolder, Path.ChangeExtension(episodeFileName, ".xml"));
 
-            await FetchMetadata(episode, args.Parent as Season, metadataFile).ConfigureAwait(false);
+                FetchMetadata(episode, args.Parent as Season, metadataFile);
+
+            }).ConfigureAwait(false);
         }
 
-        private async Task FetchMetadata(Episode item, Season season, string metadataFile)
+        private void FetchMetadata(Episode item, Season season, string metadataFile)
         {
             if (season == null)
             {
@@ -50,13 +52,13 @@ namespace MediaBrowser.TV.Providers
             }
             else
             {
-                if (!season.MetadataFiles.Any(s => s.Equals(metadataFile, StringComparison.OrdinalIgnoreCase)))
+                if (!season.ContainsMetadataFile(metadataFile))
                 {
                     return;
                 }
             }
 
-            await Task.Run(() => { new EpisodeXmlParser().Fetch(item, metadataFile); }).ConfigureAwait(false);
+            new EpisodeXmlParser().Fetch(item, metadataFile);
         }
     }
 }

MediaBrowser.TV/Resolvers/SeasonResolver.cs

@@ -3,7 +3,6 @@ using System.IO;
 using MediaBrowser.Controller.Events;
 using MediaBrowser.Controller.Resolvers;
 using MediaBrowser.TV.Entities;
-using MediaBrowser.TV.Metadata;
 
 namespace MediaBrowser.TV.Resolvers
 {

MediaBrowser.TV/Resolvers/SeriesResolver.cs

@@ -14,12 +14,6 @@ namespace MediaBrowser.TV.Resolvers
         {
             if (args.IsFolder && (args.VirtualFolderCollectionType ?? string.Empty).Equals("TV", StringComparison.OrdinalIgnoreCase))
             {
-                // Optimization to avoid running these tests against VF's
-                if (args.Parent != null && args.Parent.IsRoot)
-                {
-                    return null;
-                }
-
                 // Optimization to avoid running these tests against Seasons
                 if (args.Parent is Series)
                 {

MediaBrowser.TV/TVUtils.cs

@@ -53,10 +53,12 @@ namespace MediaBrowser.TV
             return seasonPathExpressions.Any(r => r.IsMatch(path));
         }
 
-        public static bool IsSeriesFolder(string path, IEnumerable<KeyValuePair<string, WIN32_FIND_DATA>> fileSystemChildren)
+        public static bool IsSeriesFolder(string path, KeyValuePair<string, WIN32_FIND_DATA>[] fileSystemChildren)
         {
-            foreach (var child in fileSystemChildren)
+            for (int i = 0; i < fileSystemChildren.Length; i++)
             {
+                var child = fileSystemChildren[i];
+
                 if (child.Value.IsDirectory)
                 {
                     if (IsSeasonFolder(child.Key))
@@ -76,22 +78,6 @@ namespace MediaBrowser.TV
             return false;
         }
 
-        public static bool IsEpisode(string fullPath)
-        {
-            bool isInSeason = IsSeasonFolder(Path.GetDirectoryName(fullPath));
-
-            if (isInSeason)
-            {
-                return true;
-            }
-            else if (EpisodeNumberFromFile(fullPath, isInSeason) != null)
-            {
-                return true;
-            }
-
-            return false;
-        }
-
         public static string EpisodeNumberFromFile(string fullPath, bool isInSeason)
         {
             string fl = fullPath.ToLower();