New: Add qBittorrent sequential order and first and last piece priority options

Fixes #2660

src/NzbDrone.Core/Download/Clients/QBittorrent/QBittorrentProxyV2.cs

@@ -142,20 +142,8 @@ namespace NzbDrone.Core.Download.Clients.QBittorrent
             var request = BuildRequest(settings).Resource("/api/v2/torrents/add")
                                                 .Post()
                                                 .AddFormParameter("urls", torrentUrl);
-            if (settings.MusicCategory.IsNotNullOrWhiteSpace())
-            {
-                request.AddFormParameter("category", settings.MusicCategory);
-            }
 
-            // Note: ForceStart is handled by separate api call
-            if ((QBittorrentState)settings.InitialState == QBittorrentState.Start)
-            {
-                request.AddFormParameter("paused", false);
-            }
-            else if ((QBittorrentState)settings.InitialState == QBittorrentState.Pause)
-            {
-                request.AddFormParameter("paused", true);
-            }
+            AddTorrentDownloadFormParameters(request, settings);
 
             if (seedConfiguration != null)
             {
@@ -177,20 +165,7 @@ namespace NzbDrone.Core.Download.Clients.QBittorrent
                                                 .Post()
                                                 .AddFormUpload("torrents", fileName, fileContent);
 
-            if (settings.MusicCategory.IsNotNullOrWhiteSpace())
-            {
-                request.AddFormParameter("category", settings.MusicCategory);
-            }
-
-            // Note: ForceStart is handled by separate api call
-            if ((QBittorrentState)settings.InitialState == QBittorrentState.Start)
-            {
-                request.AddFormParameter("paused", false);
-            }
-            else if ((QBittorrentState)settings.InitialState == QBittorrentState.Pause)
-            {
-                request.AddFormParameter("paused", true);
-            }
+            AddTorrentDownloadFormParameters(request, settings);
 
             if (seedConfiguration != null)
             {
@@ -259,6 +234,34 @@ namespace NzbDrone.Core.Download.Clients.QBittorrent
             }
         }
 
+        private void AddTorrentDownloadFormParameters(HttpRequestBuilder request, QBittorrentSettings settings)
+        {
+            if (settings.MusicCategory.IsNotNullOrWhiteSpace())
+            {
+                request.AddFormParameter("category", settings.MusicCategory);
+            }
+
+            // Note: ForceStart is handled by separate api call
+            if ((QBittorrentState)settings.InitialState == QBittorrentState.Start)
+            {
+                request.AddFormParameter("paused", false);
+            }
+            else if ((QBittorrentState)settings.InitialState == QBittorrentState.Pause)
+            {
+                request.AddFormParameter("paused", true);
+            }
+
+            if (settings.SequentialOrder)
+            {
+                request.AddFormParameter("sequentialDownload", true);
+            }
+
+            if (settings.FirstAndLast)
+            {
+                request.AddFormParameter("firstLastPiecePrio", true);
+            }
+        }
+
         public void SetTorrentSeedingConfiguration(string hash, TorrentSeedConfiguration seedConfiguration, QBittorrentSettings settings)
         {
             var request = BuildRequest(settings).Resource("/api/v2/torrents/setShareLimits")

src/NzbDrone.Core/Download/Clients/QBittorrent/QBittorrentSettings.cs

@@ -63,6 +63,12 @@ namespace NzbDrone.Core.Download.Clients.QBittorrent
         [FieldDefinition(10, Label = "Initial State", Type = FieldType.Select, SelectOptions = typeof(QBittorrentState), HelpText = "Initial state for torrents added to qBittorrent")]
         public int InitialState { get; set; }
 
+        [FieldDefinition(11, Label = "Sequential Order", Type = FieldType.Checkbox, HelpText = "Download in sequential order (qBittorrent 4.1.0+)")]
+        public bool SequentialOrder { get; set; }
+
+        [FieldDefinition(12, Label = "First and Last First", Type = FieldType.Checkbox, HelpText = "Download first and last pieces first (qBittorrent 4.1.0+)")]
+        public bool FirstAndLast { get; set; }
+
         public NzbDroneValidationResult Validate()
         {
             return new NzbDroneValidationResult(Validator.Validate(this));