New: Send genres to calibre as tags

src/NzbDrone.Core/Books/Calibre/CalibreBook.cs

@@ -24,6 +24,8 @@ namespace NzbDrone.Core.Books.Calibre
 
         public List<string> Languages { get; set; }
 
+        public List<string> Tags { get; set; }
+
         public string Comments { get; set; }
 
         public double Rating { get; set; }
@@ -72,6 +74,11 @@ namespace NzbDrone.Core.Books.Calibre
                 output.Add("Languages", Tuple.Create(string.Join(" / ", Languages), string.Join(" / ", other.Languages)));
             }
 
+            if (!Tags.OrderBy(x => x).SequenceEqual(other.Tags.OrderBy(x => x)))
+            {
+                output.Add("Tags", Tuple.Create(string.Join(" / ", Tags), string.Join(" / ", other.Tags)));
+            }
+
             if (Comments != other.Comments)
             {
                 output.Add("Comments", Tuple.Create(Comments, other.Comments));

src/NzbDrone.Core/Books/Calibre/CalibreProxy.cs

@@ -184,6 +184,9 @@ namespace NzbDrone.Core.Books.Calibre
                 }
             }
 
+            var textInfo = CultureInfo.InvariantCulture.TextInfo;
+            var genres = book.Genres.Select(x => textInfo.ToTitleCase(x.Replace('-', ' '))).ToList();
+
             var payload = new CalibreChangesPayload
             {
                 LoadedBookIds = new List<int> { file.CalibreId },
@@ -195,6 +198,7 @@ namespace NzbDrone.Core.Books.Calibre
                     PubDate = book.ReleaseDate,
                     Publisher = edition.Publisher,
                     Languages = edition.Language.CanonicalizeLanguage(),
+                    Tags = genres,
                     Comments = edition.Overview,
                     Rating = (int)(edition.Ratings.Value * 2),
                     Identifiers = new Dictionary<string, string>

src/NzbDrone.Core/Books/Calibre/Resources/CalibreChanges.cs

@@ -20,6 +20,7 @@ namespace NzbDrone.Core.Books.Calibre
         public DateTime? PubDate { get; set; }
         public string Publisher { get; set; }
         public string Languages { get; set; }
+        public List<string> Tags { get; set; }
         public string Comments { get; set; }
         public decimal Rating { get; set; }
         public Dictionary<string, string> Identifiers { get; set; }

src/NzbDrone.Core/MediaFiles/EbookTagService.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.IO.Abstractions;
 using System.Linq;
@@ -226,6 +227,9 @@ namespace NzbDrone.Core.MediaFiles
 
                 var oldTags = dict[file.CalibreId];
 
+                var textInfo = CultureInfo.InvariantCulture.TextInfo;
+                var genres = book.Genres.Select(x => textInfo.ToTitleCase(x.Replace('-', ' '))).ToList();
+
                 var newTags = new CalibreBook
                 {
                     Title = edition.Title,
@@ -233,6 +237,7 @@ namespace NzbDrone.Core.MediaFiles
                     PubDate = book.ReleaseDate,
                     Publisher = edition.Publisher,
                     Languages = new List<string> { edition.Language.CanonicalizeLanguage() },
+                    Tags = genres,
                     Comments = edition.Overview,
                     Rating = (int)(edition.Ratings.Value * 2) / 2.0,
                     Identifiers = new Dictionary<string, string>