indexer cleanup.

NzbDrone.Core/Indexers/IndexerService.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Linq;
 using NLog;
 using NzbDrone.Core.ThingiProvider;
 
@@ -11,9 +12,29 @@ namespace NzbDrone.Core.Indexers
 
     public class IndexerService : ProviderFactory<IIndexer, IndexerDefinition>
     {
+        private readonly IProviderRepository<IndexerDefinition> _providerRepository;
+        private readonly IEnumerable<IIndexer> _providers;
+
         public IndexerService(IProviderRepository<IndexerDefinition> providerRepository, IEnumerable<IIndexer> providers, Logger logger)
             : base(providerRepository, providers, logger)
         {
+            _providerRepository = providerRepository;
+            _providers = providers;
+        }
+
+        protected override void InitializeProviders()
+        {
+            var definitions = _providers.SelectMany(indexer => indexer.DefaultDefinitions);
+
+            var currentProviders = All();
+
+            var newProviders = definitions.Where(def => currentProviders.All(c => c.Implementation != def.Implementation)).ToList();
+
+
+            if (newProviders.Any())
+            {
+                _providerRepository.InsertMany(newProviders.Cast<IndexerDefinition>().ToList());
+            }
         }
     }
 }