New: Optional 'downloadClientId' for pushed releases

(cherry picked from commit fa5bfc3742c24c5730b77bf8178a423d98fdf50e)

Closes #2934

src/NzbDrone.Core/Download/ProcessDownloadDecisions.cs

@@ -14,6 +14,7 @@ namespace NzbDrone.Core.Download
     public interface IProcessDownloadDecisions
     {
         Task<ProcessedDecisions> ProcessDecisions(List<DownloadDecision> decisions);
+        Task<ProcessedDecisionResult> ProcessDecision(DownloadDecision decision, int? downloadClientId);
     }
 
     public class ProcessDownloadDecisions : IProcessDownloadDecisions
@@ -40,8 +41,6 @@ namespace NzbDrone.Core.Download
             var prioritizedDecisions = _prioritizeDownloadDecision.PrioritizeDecisions(qualifiedReports);
             var grabbed = new List<DownloadDecision>();
             var pending = new List<DownloadDecision>();
-
-            //var failed = new List<DownloadDecision>();
             var rejected = decisions.Where(d => d.Rejected).ToList();
 
             var pendingAddQueue = new List<Tuple<DownloadDecision, PendingReleaseReason>>();
@@ -51,7 +50,6 @@ namespace NzbDrone.Core.Download
 
             foreach (var report in prioritizedDecisions)
             {
-                var remoteBook = report.RemoteBook;
                 var downloadProtocol = report.RemoteBook.Release.DownloadProtocol;
 
                 //Skip if already grabbed
@@ -73,37 +71,48 @@ namespace NzbDrone.Core.Download
                     continue;
                 }
 
-                try
-                {
-                    _logger.Trace("Grabbing from Indexer {0} at priority {1}.", remoteBook.Release.Indexer, remoteBook.Release.IndexerPriority);
-                    await _downloadService.DownloadReport(remoteBook, null);
-                    grabbed.Add(report);
-                }
-                catch (ReleaseUnavailableException)
-                {
-                    _logger.Warn("Failed to download release from indexer, no longer available. " + remoteBook);
-                    rejected.Add(report);
-                }
-                catch (Exception ex)
+                var result = await ProcessDecisionInternal(report);
+
+                switch (result)
                 {
-                    if (ex is DownloadClientUnavailableException || ex is DownloadClientAuthenticationException)
-                    {
-                        _logger.Debug(ex, "Failed to send release to download client, storing until later. " + remoteBook);
-                        PreparePending(pendingAddQueue, grabbed, pending, report, PendingReleaseReason.DownloadClientUnavailable);
+                    case ProcessedDecisionResult.Grabbed:
+                        {
+                            grabbed.Add(report);
+                            break;
+                        }
+
+                    case ProcessedDecisionResult.Pending:
+                        {
+                            PreparePending(pendingAddQueue, grabbed, pending, report, PendingReleaseReason.Delay);
+                            break;
+                        }
 
-                        if (downloadProtocol == DownloadProtocol.Usenet)
+                    case ProcessedDecisionResult.Rejected:
                         {
-                            usenetFailed = true;
+                            rejected.Add(report);
+                            break;
                         }
-                        else if (downloadProtocol == DownloadProtocol.Torrent)
+
+                    case ProcessedDecisionResult.Failed:
                         {
-                            torrentFailed = true;
+                            PreparePending(pendingAddQueue, grabbed, pending, report, PendingReleaseReason.DownloadClientUnavailable);
+
+                            if (downloadProtocol == DownloadProtocol.Usenet)
+                            {
+                                usenetFailed = true;
+                            }
+                            else if (downloadProtocol == DownloadProtocol.Torrent)
+                            {
+                                torrentFailed = true;
+                            }
+
+                            break;
+                        }
+
+                    case ProcessedDecisionResult.Skipped:
+                        {
+                            break;
                         }
-                    }
-                    else
-                    {
-                        _logger.Warn(ex, "Couldn't add report to download queue. " + remoteBook);
-                    }
                 }
             }
 
@@ -115,6 +124,30 @@ namespace NzbDrone.Core.Download
             return new ProcessedDecisions(grabbed, pending, rejected);
         }
 
+        public async Task<ProcessedDecisionResult> ProcessDecision(DownloadDecision decision, int? downloadClientId)
+        {
+            if (decision == null)
+            {
+                return ProcessedDecisionResult.Skipped;
+            }
+
+            if (decision.TemporarilyRejected)
+            {
+                _pendingReleaseService.Add(decision, PendingReleaseReason.Delay);
+
+                return ProcessedDecisionResult.Pending;
+            }
+
+            var result = await ProcessDecisionInternal(decision, downloadClientId);
+
+            if (result == ProcessedDecisionResult.Failed)
+            {
+                _pendingReleaseService.Add(decision, PendingReleaseReason.DownloadClientUnavailable);
+            }
+
+            return result;
+        }
+
         internal List<DownloadDecision> GetQualifiedReports(IEnumerable<DownloadDecision> decisions)
         {
             //Process both approved and temporarily rejected
@@ -148,5 +181,38 @@ namespace NzbDrone.Core.Download
             queue.Add(Tuple.Create(report, reason));
             pending.Add(report);
         }
+
+        private async Task<ProcessedDecisionResult> ProcessDecisionInternal(DownloadDecision decision, int? downloadClientId = null)
+        {
+            var remoteBook = decision.RemoteBook;
+
+            try
+            {
+                _logger.Trace("Grabbing from Indexer {0} at priority {1}.", remoteBook.Release.Indexer, remoteBook.Release.IndexerPriority);
+                await _downloadService.DownloadReport(remoteBook, downloadClientId);
+
+                return ProcessedDecisionResult.Grabbed;
+            }
+            catch (ReleaseUnavailableException)
+            {
+                _logger.Warn("Failed to download release from indexer, no longer available. " + remoteBook);
+                return ProcessedDecisionResult.Rejected;
+            }
+            catch (Exception ex)
+            {
+                if (ex is DownloadClientUnavailableException || ex is DownloadClientAuthenticationException)
+                {
+                    _logger.Debug(ex,
+                        "Failed to send release to download client, storing until later. " + remoteBook);
+
+                    return ProcessedDecisionResult.Failed;
+                }
+                else
+                {
+                    _logger.Warn(ex, "Couldn't add report to download queue. " + remoteBook);
+                    return ProcessedDecisionResult.Skipped;
+                }
+            }
+        }
     }
 }

src/NzbDrone.Core/Download/ProcessedDecisionResult.cs

@@ -0,0 +1,11 @@
+namespace NzbDrone.Core.Download
+{
+    public enum ProcessedDecisionResult
+    {
+        Grabbed,
+        Pending,
+        Rejected,
+        Failed,
+        Skipped
+    }
+}

src/Readarr.Api.V1/Indexers/ReleasePushController.cs

@@ -53,22 +53,23 @@ namespace Readarr.Api.V1.Indexers
 
             ResolveIndexer(info);
 
-            List<DownloadDecision> decisions;
+            DownloadDecision decision;
 
             lock (PushLock)
             {
-                decisions = _downloadDecisionMaker.GetRssDecision(new List<ReleaseInfo> { info }, true);
-                _downloadDecisionProcessor.ProcessDecisions(decisions).GetAwaiter().GetResult();
-            }
+                var decisions = _downloadDecisionMaker.GetRssDecision(new List<ReleaseInfo> { info }, true);
+
+                decision = decisions.FirstOrDefault();
 
-            var firstDecision = decisions.FirstOrDefault();
+                _downloadDecisionProcessor.ProcessDecision(decision, release.DownloadClientId).GetAwaiter().GetResult();
+            }
 
-            if (firstDecision?.RemoteBook.ParsedBookInfo == null)
+            if (decision?.RemoteBook.ParsedBookInfo == null)
             {
-                throw new ValidationException(new List<ValidationFailure> { new ValidationFailure("Title", "Unable to parse", release.Title) });
+                throw new ValidationException(new List<ValidationFailure> { new ("Title", "Unable to parse", release.Title) });
             }
 
-            return MapDecisions(new[] { firstDecision }).First();
+            return MapDecisions(new[] { decision }).First();
         }
 
         private void ResolveIndexer(ReleaseInfo release)