made base video resolver available for re-use

MediaBrowser.Controller/Resolvers/BaseVideoResolver.cs

@@ -0,0 +1,56 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Entities;
+using System;
+using System.IO;
+
+namespace MediaBrowser.Controller.Resolvers
+{
+    /// <summary>
+    /// Resolves a Path into a Video or Video subclass
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public abstract class BaseVideoResolver<T> : ItemResolver<T>
+        where T : Video, new()
+    {
+        /// <summary>
+        /// Resolves the specified args.
+        /// </summary>
+        /// <param name="args">The args.</param>
+        /// <returns>`0.</returns>
+        protected override T Resolve(ItemResolveArgs args)
+        {
+            // If the path is a file check for a matching extensions
+            if (!args.IsDirectory)
+            {
+                if (EntityResolutionHelper.IsVideoFile(args.Path))
+                {
+                    var extension = Path.GetExtension(args.Path);
+
+                    var type = string.Equals(extension, ".iso", StringComparison.OrdinalIgnoreCase) || string.Equals(extension, ".img", StringComparison.OrdinalIgnoreCase) ?
+                        VideoType.Iso : VideoType.VideoFile;
+
+                    return new T
+                    {
+                        VideoType = type,
+                        Path = args.Path
+                    };
+                }
+            }
+
+            return null;
+        }
+
+        /// <summary>
+        /// Sets the initial item values.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="args">The args.</param>
+        protected override void SetInitialItemValues(T item, ItemResolveArgs args)
+        {
+            base.SetInitialItemValues(item, args);
+
+            item.VideoFormat = item.Path.IndexOf("[3d]", StringComparison.OrdinalIgnoreCase) != -1 ? VideoFormat.Digital3D : item.Path.IndexOf("[sbs3d]", StringComparison.OrdinalIgnoreCase) != -1 ? VideoFormat.Sbs3D : VideoFormat.Standard;
+        }
+    }
+}