add refresh item api method

MediaBrowser.Api/LibraryService.cs

@@ -96,6 +96,17 @@ namespace MediaBrowser.Api
     {
     }
 
+    [Route("/Items/{Id}/Refresh", "POST")]
+    [Api(Description = "Refreshes metadata for an item")]
+    public class RefreshItem : IReturnVoid
+    {
+        [ApiMember(Name = "IsForced", Description = "Indicates if a normal or forced refresh should occur.", IsRequired = true, DataType = "bool", ParameterType = "query", Verb = "POST")]
+        public bool IsForced { get; set; }
+
+        [ApiMember(Name = "Id", Description = "Item Id", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "POST")]
+        public string Id { get; set; }
+    }
+
     [Route("/Items/Counts", "GET")]
     [Api(Description = "Gets counts of various item types")]
     public class GetItemCounts : IReturn<ItemCounts>
@@ -304,6 +315,17 @@ namespace MediaBrowser.Api
             return ToOptimizedResult(result);
         }
 
+        /// <summary>
+        /// Posts the specified request.
+        /// </summary>
+        /// <param name="request">The request.</param>
+        public void Post(RefreshItem request)
+        {
+            var item = DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager);
+
+            item.RefreshMetadata(CancellationToken.None, forceRefresh: request.IsForced);
+        }
+
         /// <summary>
         /// Gets the specified request.
         /// </summary>
@@ -467,7 +489,7 @@ namespace MediaBrowser.Api
         {
             var artists1 = item1.RecursiveChildren
                 .OfType<Audio>()
-                .SelectMany(i => new[]{i.AlbumArtist, i.Artist})
+                .SelectMany(i => new[] { i.AlbumArtist, i.Artist })
                 .Where(i => !string.IsNullOrEmpty(i))
                 .Distinct(StringComparer.OrdinalIgnoreCase)
                 .ToList();

MediaBrowser.Server.Implementations/Providers/ProviderManager.cs

@@ -1,5 +1,4 @@
-using MediaBrowser.Common.Extensions;
-using MediaBrowser.Common.IO;
+using MediaBrowser.Common.IO;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
@@ -97,11 +96,6 @@ namespace MediaBrowser.Server.Implementations.Providers
             MetadataProviders = providers.OrderBy(e => e.Priority).ToArray();
         }
 
-        /// <summary>
-        /// The _supported providers key
-        /// </summary>
-        private readonly Guid _supportedProvidersKey = "SupportedProviders".GetMD5();
-
         /// <summary>
         /// Runs all metadata providers for an entity, and returns true or false indicating if at least one was refreshed and requires persistence
         /// </summary>
@@ -120,40 +114,10 @@ namespace MediaBrowser.Server.Implementations.Providers
 
             cancellationToken.ThrowIfCancellationRequested();
 
-            // Determine if supported providers have changed
-            var supportedProviders = MetadataProviders.Where(p => p.Supports(item)).ToList();
-
-            BaseProviderInfo supportedProvidersInfo;
-
-            var supportedProvidersValue = string.Join(string.Empty, supportedProviders.Select(i => i.GetType().Name));
-            var providersChanged = false;
-
-            item.ProviderData.TryGetValue(_supportedProvidersKey, out supportedProvidersInfo);
-
-            var supportedProvidersHash = supportedProvidersValue.GetMD5();
-
-            if (supportedProvidersInfo != null)
-            {
-                // Force refresh if the supported providers have changed
-                providersChanged = force = force || supportedProvidersHash != supportedProvidersInfo.Data;
-
-                // If providers have changed, clear provider info and update the supported providers hash
-                if (providersChanged)
-                {
-                    _logger.Debug("Providers changed for {0}. Clearing and forcing refresh.", item.Name);
-                    item.ProviderData.Clear();
-                }
-            }
-
-            if (providersChanged)
-            {
-                supportedProvidersInfo.Data = supportedProvidersHash;
-            }
-
             if (force) item.ClearMetaValues();
 
             // Run the normal providers sequentially in order of priority
-            foreach (var provider in supportedProviders)
+            foreach (var provider in MetadataProviders.Where(p => p.Supports(item)))
             {
                 cancellationToken.ThrowIfCancellationRequested();
 
@@ -206,12 +170,7 @@ namespace MediaBrowser.Server.Implementations.Providers
                 result |= results.Contains(true);
             }
 
-            if (providersChanged)
-            {
-                item.ProviderData[_supportedProvidersKey] = supportedProvidersInfo;
-            }
-
-            return result || providersChanged;
+            return result;
         }
 
         /// <summary>