Add genre filtering function; Add genre filter to discovery

src/Ombi.TheMovieDbApi/TheMovieDbApi.cs

@@ -202,6 +202,7 @@ namespace Ombi.Api.TheMovieDb
                 request.AddQueryString("page", page.ToString());
             }
             await AddDiscoverSettings(request);
+            await AddGenreFilter(request, type);
             AddRetry(request);
             var result = await Api.Request<TheMovieDbContainer<SearchResult>>(request, cancellationToken);
             return Mapper.Map<List<MovieDbSearchResult>>(result.results);
@@ -237,6 +238,7 @@ namespace Ombi.Api.TheMovieDb
             request.AddQueryString("vote_count.gte", "250");
 
             await AddDiscoverSettings(request);
+            await AddGenreFilter(request, type);
             AddRetry(request);
             var result = await Api.Request<TheMovieDbContainer<SearchResult>>(request);
             return Mapper.Map<List<MovieDbSearchResult>>(result.results);
@@ -273,6 +275,7 @@ namespace Ombi.Api.TheMovieDb
                 request.AddQueryString("page", page.ToString());
             }
             await AddDiscoverSettings(request);
+            await AddGenreFilter(request, type);
             AddRetry(request);
             var result = await Api.Request<TheMovieDbContainer<SearchResult>>(request);
             return Mapper.Map<List<MovieDbSearchResult>>(result.results);
@@ -301,6 +304,7 @@ namespace Ombi.Api.TheMovieDb
             }
 
             await AddDiscoverSettings(request);
+            await AddGenreFilter(request, "movie");
             AddRetry(request);
             var result = await Api.Request<TheMovieDbContainer<SearchResult>>(request);
             return Mapper.Map<List<MovieDbSearchResult>>(result.results);
@@ -394,6 +398,28 @@ namespace Ombi.Api.TheMovieDb
             }
         }
 
+        private async Task AddGenreFilter(Request request, string media_type)
+        {
+            var settings = await Settings;
+            List<int> excludedGenres;
+
+            switch (media_type) {
+                case "tv":
+                    excludedGenres = settings.ExcludedTvGenreIds;
+                    break;
+                case "movie":
+                    excludedGenres = settings.ExcludedMovieGenreIds;
+                    break;
+                default:
+                    return;
+            }
+
+            if (excludedGenres?.Any() == true)
+            {
+                request.AddQueryString("without_genres", string.Join(",", excludedGenres));
+            }
+        }
+
         private static void AddRetry(Request request)
         {
             request.Retry = true;