Missing episode search will skip already queued releases

src/NzbDrone.Core/IndexerSearch/EpisodeSearchService.cs

@@ -6,6 +6,7 @@ using NzbDrone.Core.Datastore;
 using NzbDrone.Core.Download;
 using NzbDrone.Core.Instrumentation.Extensions;
 using NzbDrone.Core.Messaging.Commands;
+using NzbDrone.Core.Queue;
 using NzbDrone.Core.Tv;
 
 namespace NzbDrone.Core.IndexerSearch
@@ -15,16 +16,19 @@ namespace NzbDrone.Core.IndexerSearch
         private readonly ISearchForNzb _nzbSearchService;
         private readonly IDownloadApprovedReports _downloadApprovedReports;
         private readonly IEpisodeService _episodeService;
+        private readonly IQueueService _queueService;
         private readonly Logger _logger;
 
         public MissingEpisodeSearchService(ISearchForNzb nzbSearchService,
                                     IDownloadApprovedReports downloadApprovedReports,
                                     IEpisodeService episodeService,
+                                    IQueueService queueService,
                                     Logger logger)
         {
             _nzbSearchService = nzbSearchService;
             _downloadApprovedReports = downloadApprovedReports;
             _episodeService = episodeService;
+            _queueService = queueService;
             _logger = logger;
         }
 
@@ -53,13 +57,15 @@ namespace NzbDrone.Core.IndexerSearch
                                                          FilterExpression = v => v.Monitored == true && v.Series.Monitored == true
                                                      }).Records.ToList();
 
+            var missing = episodes.Where(e => _queueService.GetQueue().Select(q => q.Episode.Id).Contains(e.Id));
+
             _logger.ProgressInfo("Performing missing search for {0} episodes", episodes.Count);
             var downloadedCount = 0;
 
             //Limit requests to indexers at 100 per minute
             using (var rateGate = new RateGate(100, TimeSpan.FromSeconds(60)))
             {
-                foreach (var episode in episodes)
+                foreach (var episode in missing)
                 {
                     rateGate.WaitToProceed();
                     var decisions = _nzbSearchService.EpisodeSearch(episode);