enable plex for television (#73)

* add plex show, season sync

* sync plex episodes

* sync plex episode statistics

* update plex artwork as needed

* code cleanup

* add note about tests

ErsatzTV.Core/Interfaces/Plex/IPlexServerApiClient.cs

@@ -12,13 +12,30 @@ namespace ErsatzTV.Core.Interfaces.Plex
             PlexConnection connection,
             PlexServerAuthToken token);
 
-        Task<Either<BaseError, List<PlexMovie>>> GetLibraryContents(
+        Task<Either<BaseError, List<PlexMovie>>> GetMovieLibraryContents(
             PlexLibrary library,
             PlexConnection connection,
             PlexServerAuthToken token);
 
+        Task<Either<BaseError, List<PlexShow>>> GetShowLibraryContents(
+            PlexLibrary library,
+            PlexConnection connection,
+            PlexServerAuthToken token);
+
+        Task<Either<BaseError, List<PlexSeason>>> GetShowSeasons(
+            PlexLibrary library,
+            PlexShow show,
+            PlexConnection connection,
+            PlexServerAuthToken token);
+
+        Task<Either<BaseError, List<PlexEpisode>>> GetSeasonEpisodes(
+            PlexLibrary library,
+            PlexSeason season,
+            PlexConnection connection,
+            PlexServerAuthToken token);
+
         Task<Either<BaseError, MediaVersion>> GetStatistics(
-            PlexMovie movie,
+            string key,
             PlexConnection connection,
             PlexServerAuthToken token);
     }

ErsatzTV.Core/Interfaces/Plex/IPlexTelevisionLibraryScanner.cs

@@ -0,0 +1,15 @@
+using System.Threading.Tasks;
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Plex;
+using LanguageExt;
+
+namespace ErsatzTV.Core.Interfaces.Plex
+{
+    public interface IPlexTelevisionLibraryScanner
+    {
+        Task<Either<BaseError, Unit>> ScanLibrary(
+            PlexConnection connection,
+            PlexServerAuthToken token,
+            PlexLibrary plexMediaSourceLibrary);
+    }
+}