New: Detect audio vs text from newznab categories

src/NzbDrone.Core.Test/DecisionEngineTests/DownloadDecisionMakerFixture.cs

@@ -11,6 +11,7 @@
 using NzbDrone.Core.IndexerSearch.Definitions;
 using NzbDrone.Core.Parser;
 using NzbDrone.Core.Parser.Model;
+using NzbDrone.Core.Qualities;
 using NzbDrone.Core.Test.Framework;
 using NzbDrone.Test.Common;
 
@@ -60,7 +61,8 @@ public void Setup()
             _remoteBook = new RemoteBook
             {
                 Author = new Author(),
-                Books = new List<Book> { new Book() }
+                Books = new List<Book> { new Book() },
+                ParsedBookInfo = Builder<ParsedBookInfo>.CreateNew().With(x => x.Quality = new QualityModel(Quality.FLAC)).Build()
             };
 
             Mocker.GetMock<IParsingService>()

src/NzbDrone.Core.Test/Profiles/ProfileServiceFixture.cs

@@ -21,7 +21,7 @@ public void init_should_add_default_profiles()
             Subject.Handle(new ApplicationStartedEvent());
 
             Mocker.GetMock<IProfileRepository>()
-                .Verify(v => v.Insert(It.IsAny<QualityProfile>()), Times.Exactly(4));
+                .Verify(v => v.Insert(It.IsAny<QualityProfile>()), Times.Exactly(3));
         }
 
         [Test]

src/NzbDrone.Core/DecisionEngine/DownloadDecisionMaker.cs

@@ -10,6 +10,7 @@
 using NzbDrone.Core.IndexerSearch.Definitions;
 using NzbDrone.Core.Parser;
 using NzbDrone.Core.Parser.Model;
+using NzbDrone.Core.Qualities;
 
 namespace NzbDrone.Core.DecisionEngine
 {
@@ -105,6 +106,12 @@ private IEnumerable<DownloadDecision> GetBookDecisions(List<ReleaseInfo> reports
 
                         remoteBook.Release = report;
 
+                        // parse quality again with title and category if unknown
+                        if (remoteBook.ParsedBookInfo.Quality.Quality == Quality.Unknown)
+                        {
+                            remoteBook.ParsedBookInfo.Quality = QualityParser.ParseQuality(report.Title, null, report.Categories);
+                        }
+
                         if (remoteBook.Author == null)
                         {
                             decision = new DownloadDecision(remoteBook, new Rejection("Unknown Author"));
@@ -138,7 +145,7 @@ private IEnumerable<DownloadDecision> GetBookDecisions(List<ReleaseInfo> reports
                         {
                             parsedBookInfo = new ParsedBookInfo
                             {
-                                Quality = QualityParser.ParseQuality(report.Title)
+                                Quality = QualityParser.ParseQuality(report.Title, null, report.Categories)
                             };
                         }
 
@@ -160,7 +167,7 @@ private IEnumerable<DownloadDecision> GetBookDecisions(List<ReleaseInfo> reports
                         {
                             parsedBookInfo = new ParsedBookInfo
                             {
-                                Quality = QualityParser.ParseQuality(report.Title, null)
+                                Quality = QualityParser.ParseQuality(report.Title, null, report.Categories)
                             };
                         }
 

src/NzbDrone.Core/Indexers/Newznab/NewznabRssParser.cs

@@ -121,6 +121,25 @@ protected override DateTime GetPublishDate(XElement item)
             return base.GetPublishDate(item);
         }
 
+        protected override List<int> GetCategories(XElement item)
+        {
+            var values = item.Elements(ns + "attr")
+                .Where(e => e.Attribute("name").Value.Equals("category", StringComparison.OrdinalIgnoreCase) &&
+                            e.Attribute("value")?.Value != null)
+                .Select(e => e.Attribute("value").Value);
+
+            var cats = new List<int>();
+            foreach (var value in values)
+            {
+                if (int.TryParse(value, out var cat))
+                {
+                    cats.Add(cat);
+                }
+            }
+
+            return cats;
+        }
+
         protected virtual string GetAuthor(XElement item)
         {
             var authorString = TryGetNewznabAttribute(item, "author");

src/NzbDrone.Core/Indexers/RssParser.cs

@@ -159,6 +159,7 @@ protected virtual ReleaseInfo ProcessItem(XElement item, ReleaseInfo releaseInfo
             releaseInfo.BasicAuthString = GetBasicAuth();
             releaseInfo.InfoUrl = GetInfoUrl(item);
             releaseInfo.CommentUrl = GetCommentUrl(item);
+            releaseInfo.Categories = GetCategories(item);
 
             try
             {
@@ -230,6 +231,11 @@ protected virtual string GetCommentUrl(XElement item)
             return ParseUrl((string)item.Element("comments"));
         }
 
+        protected virtual List<int> GetCategories(XElement item)
+        {
+            return new List<int>();
+        }
+
         protected virtual long GetSize(XElement item)
         {
             if (UseEnclosureLength)

src/NzbDrone.Core/Indexers/Torznab/TorznabRssParser.cs

@@ -91,9 +91,23 @@ protected override long GetSize(XElement item)
             return size;
         }
 
-        protected override DateTime GetPublishDate(XElement item)
+        protected override List<int> GetCategories(XElement item)
         {
-            return base.GetPublishDate(item);
+            var values = item.Elements(ns + "attr")
+                .Where(e => e.Attribute("name").Value.Equals("category", StringComparison.OrdinalIgnoreCase) &&
+                            e.Attribute("value")?.Value != null)
+                .Select(e => e.Attribute("value").Value);
+
+            var cats = new List<int>();
+            foreach (var value in values)
+            {
+                if (int.TryParse(value, out var cat))
+                {
+                    cats.Add(cat);
+                }
+            }
+
+            return cats;
         }
 
         protected override string GetDownloadUrl(XElement item)

src/NzbDrone.Core/Parser/Model/ReleaseInfo.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Text;
 using NzbDrone.Core.Indexers;
 
@@ -25,7 +26,7 @@ public class ReleaseInfo
         public string Source { get; set; }
         public string Container { get; set; }
         public string Codec { get; set; }
-        public string Resolution { get; set; }
+        public List<int> Categories { get; set; }
 
         public int Age
         {

src/NzbDrone.Core/Parser/QualityParser.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Text.RegularExpressions;
 using NLog;
 using NzbDrone.Common.Disk;
@@ -29,7 +31,7 @@ public class QualityParser
         private static readonly Regex CodecRegex = new Regex(@"\b(?:(?<PDF>PDF)|(?<MOBI>MOBI)|(?<EPUB>EPUB)|(?<AZW3>AZW3?)|(?<MP1>MPEG Version \d(.5)? Audio, Layer 1|MP1)|(?<MP2>MPEG Version \d(.5)? Audio, Layer 2|MP2)|(?<MP3VBR>MP3.*VBR|MPEG Version \d(.5)? Audio, Layer 3 vbr)|(?<MP3CBR>MP3|MPEG Version \d(.5)? Audio, Layer 3)|(?<FLAC>flac)|(?<WAVPACK>wavpack|wv)|(?<ALAC>alac)|(?<WMA>WMA\d?)|(?<WAV>WAV|PCM)|(?<AAC>M4A|M4P|M4B|AAC|mp4a|MPEG-4 Audio(?!.*alac))|(?<OGG>OGG|OGA|Vorbis))\b|(?<APE>monkey's audio|[\[|\(].*\bape\b.*[\]|\)])|(?<OPUS>Opus Version \d(.5)? Audio|[\[|\(].*\bopus\b.*[\]|\)])",
                                                              RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        public static QualityModel ParseQuality(string name, string desc = null)
+        public static QualityModel ParseQuality(string name, string desc = null, List<int> categories = null)
         {
             Logger.Debug("Trying to parse quality for {0}", name);
 
@@ -107,6 +109,16 @@ public static QualityModel ParseQuality(string name, string desc = null)
                 }
             }
 
+            //Based on category
+            if (result.Quality == Quality.Unknown && categories != null)
+            {
+                if (categories.Any(x => x >= 3000 && x < 4000))
+                {
+                    result.Quality = Quality.UnknownAudio;
+                    result.QualityDetectionSource = QualityDetectionSource.Category;
+                }
+            }
+
             return result;
         }
 

src/NzbDrone.Core/Qualities/QualityDetectionSource.cs

@@ -1,9 +1,10 @@
-namespace NzbDrone.Core.Qualities
+namespace NzbDrone.Core.Qualities
 {
     public enum QualityDetectionSource
     {
         Name,
         Extension,
-        TagLib
+        TagLib,
+        Category
     }
 }