1 files changed, 68 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/Providers/IMetadataProvider.cs b/MediaBrowser.Controller/Providers/IMetadataProvider.cs
new file mode 100644
index 000000000..843ba263b
--- /dev/null
+++ b/MediaBrowser.Controller/Providers/IMetadataProvider.cs
@@ -0,0 +1,68 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.Providers
+{
+    /// <summary>
+    /// Marker interface
+    /// </summary>
+    public interface IMetadataProvider
+    {
+        /// <summary>
+        /// Gets the name.
+        /// </summary>
+        /// <value>The name.</value>
+        string Name { get; }
+    }
+
+    public interface IMetadataProvider<TItemType> : IMetadataProvider
+           where TItemType : IHasMetadata
+    {
+    }
+    
+    public interface ILocalMetadataProvider : IMetadataProvider
+    {
+        /// <summary>
+        /// Determines whether [has local metadata] [the specified item].
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <returns><c>true</c> if [has local metadata] [the specified item]; otherwise, <c>false</c>.</returns>
+        bool HasLocalMetadata(IHasMetadata item);
+    }
+
+    public interface IRemoteMetadataProvider : IMetadataProvider
+    {
+    }
+
+    public interface IRemoteMetadataProvider<TItemType> : IMetadataProvider<TItemType>, IRemoteMetadataProvider
+        where TItemType : IHasMetadata
+    {
+        Task<MetadataResult<TItemType>> GetMetadata(ItemId id, CancellationToken cancellationToken);
+    }
+
+    public interface ILocalMetadataProvider<TItemType> : IMetadataProvider<TItemType>, ILocalMetadataProvider
+         where TItemType : IHasMetadata
+    {
+        Task<MetadataResult<TItemType>> GetMetadata(string path, CancellationToken cancellationToken);
+    }
+
+    public interface IHasChangeMonitor
+    {
+        /// <summary>
+        /// Determines whether the specified item has changed.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="date">The date.</param>
+        /// <returns><c>true</c> if the specified item has changed; otherwise, <c>false</c>.</returns>
+        bool HasChanged(IHasMetadata item, DateTime date);
+    }
+
+    public class MetadataResult<T>
+        where T : IHasMetadata
+    {
+        public bool HasMetadata { get; set; }
+        public T Item { get; set; }
+    }
+
+}