Fixed: Exception thrown when marking download as complete

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

src/NzbDrone.Core.Test/Download/CompletedDownloadServiceTests/ImportFixture.cs

@@ -56,6 +56,10 @@ namespace NzbDrone.Core.Test.Download
             Mocker.GetMock<IParsingService>()
                   .Setup(s => s.GetMovie("Drone.1998"))
                   .Returns(remoteMovie.Movie);
+
+            Mocker.GetMock<IHistoryService>()
+                  .Setup(s => s.FindByDownloadId(It.IsAny<string>()))
+                  .Returns(new List<MovieHistory>());
         }
 
         private RemoteMovie BuildRemoteMovie()

src/NzbDrone.Core/Download/CompletedDownloadService.cs

@@ -2,8 +2,10 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using NLog;
+using NLog.Fluent;
 using NzbDrone.Common.EnvironmentInfo;
 using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Instrumentation.Extensions;
 using NzbDrone.Core.Download.TrackedDownloads;
 using NzbDrone.Core.History;
 using NzbDrone.Core.MediaFiles;
@@ -150,8 +152,8 @@ namespace NzbDrone.Core.Download
             // Double check if all movies were imported by checking the history if at least one
             // file was imported. This will allow the decision engine to reject already imported
             // episode files and still mark the download complete when all files are imported.
-            if (importResults.Any(c => c.Result == ImportResultType.Imported))
-            {
+            var atLeastOneMovieImported = importResults.Any(c => c.Result == ImportResultType.Imported);
+
             var historyItems = _historyService.FindByDownloadId(trackedDownload.DownloadItem.DownloadId)
                                                   .OrderByDescending(h => h.Date)
                                                   .ToList();
@@ -159,12 +161,24 @@ namespace NzbDrone.Core.Download
             var allMoviesImportedInHistory = _trackedDownloadAlreadyImported.IsImported(trackedDownload, historyItems);
 
             if (allMoviesImportedInHistory)
+            {
+                if (atLeastOneMovieImported)
                 {
                     _logger.Debug("All movies were imported in history for {0}", trackedDownload.DownloadItem.Title);
                     trackedDownload.State = TrackedDownloadState.Imported;
                     _eventAggregator.PublishEvent(new DownloadCompletedEvent(trackedDownload, trackedDownload.RemoteMovie.Movie.Id));
+
                     return true;
                 }
+
+                _logger.Debug()
+                       .Message("No Movies were just imported, but all movies were previously imported, possible issue with download history.")
+                       .Property("MovieId", trackedDownload.RemoteMovie.Movie.Id)
+                       .Property("DownloadId", trackedDownload.DownloadItem.DownloadId)
+                       .Property("Title", trackedDownload.DownloadItem.Title)
+                       .Property("Path", trackedDownload.DownloadItem.OutputPath.ToString())
+                       .WriteSentryWarn("DownloadHistoryIncomplete")
+                       .Write();
             }
 
             _logger.Debug("Not all movies have been imported for {0}", trackedDownload.DownloadItem.Title);

src/NzbDrone.Core/Download/History/DownloadHistoryService.cs

@@ -137,7 +137,7 @@ namespace NzbDrone.Core.Download.History
             var history = new DownloadHistory
             {
                 EventType = DownloadHistoryEventType.FileImported,
-                MovieId = message.MovieInfo.Movie.Id,
+                MovieId = message.ImportedMovie.MovieId,
                 DownloadId = downloadId,
                 SourceTitle = message.MovieInfo.Path,
                 Date = DateTime.UtcNow,
@@ -153,19 +153,21 @@ namespace NzbDrone.Core.Download.History
 
         public void Handle(DownloadCompletedEvent message)
         {
+            var downloadItem = message.TrackedDownload.DownloadItem;
+
             var history = new DownloadHistory
             {
                 EventType = DownloadHistoryEventType.DownloadImported,
                 MovieId = message.MovieId,
-                DownloadId = message.TrackedDownload.DownloadItem.DownloadId,
-                SourceTitle = message.TrackedDownload.DownloadItem.OutputPath.ToString(),
+                DownloadId = downloadItem.DownloadId,
+                SourceTitle = downloadItem.OutputPath.ToString(),
                 Date = DateTime.UtcNow,
                 Protocol = message.TrackedDownload.Protocol,
                 DownloadClientId = message.TrackedDownload.DownloadClient
             };
 
-            history.Data.Add("DownloadClient", message.TrackedDownload.DownloadItem.DownloadClientInfo.Type);
-            history.Data.Add("DownloadClientName", message.TrackedDownload.DownloadItem.DownloadClientInfo.Name);
+            history.Data.Add("DownloadClient", downloadItem.DownloadClientInfo.Type);
+            history.Data.Add("DownloadClientName", downloadItem.DownloadClientInfo.Name);
 
             _repository.Insert(history);
         }