add multiselect and movie tags (#62)

* add basic selection behavior to search results

* add search scrolling, selection actions

* include shows in multiselect

* multiselect movies, shows, collection items

* add movie and show tags

* code cleanup

* update show screenshot

ErsatzTV.Core/Domain/Metadata/Metadata.cs

@@ -16,5 +16,6 @@ namespace ErsatzTV.Core.Domain
         public DateTime DateUpdated { get; set; }
         public List<Artwork> Artwork { get; set; }
         public List<Genre> Genres { get; set; }
+        public List<Tag> Tags { get; set; }
     }
 }

ErsatzTV.Core/Domain/Metadata/Tag.cs

@@ -0,0 +1,8 @@
+namespace ErsatzTV.Core.Domain
+{
+    public class Tag
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+    }
+}

ErsatzTV.Core/Interfaces/Repositories/IMediaCollectionRepository.cs

@@ -9,6 +9,7 @@ namespace ErsatzTV.Core.Interfaces.Repositories
     {
         Task<Collection> Add(Collection collection);
         Task<bool> AddMediaItem(int collectionId, int mediaItemId);
+        Task<bool> AddMediaItems(int collectionId, List<int> mediaItemIds);
         Task<Option<Collection>> Get(int id);
         Task<Option<Collection>> GetCollectionWithItems(int id);
         Task<Option<Collection>> GetCollectionWithItemsUntracked(int id);

ErsatzTV.Core/Interfaces/Repositories/IMovieRepository.cs

@@ -7,6 +7,7 @@ namespace ErsatzTV.Core.Interfaces.Repositories
 {
     public interface IMovieRepository
     {
+        Task<bool> AllMoviesExist(List<int> movieIds);
         Task<Option<Movie>> GetMovie(int movieId);
         Task<Either<BaseError, Movie>> GetOrAdd(LibraryPath libraryPath, string path);
         Task<Either<BaseError, PlexMovie>> GetOrAdd(PlexLibrary library, PlexMovie item);

ErsatzTV.Core/Interfaces/Repositories/ISearchRepository.cs

@@ -8,5 +8,6 @@ namespace ErsatzTV.Core.Interfaces.Repositories
     {
         public Task<List<MediaItem>> SearchMediaItemsByTitle(string query);
         public Task<List<MediaItem>> SearchMediaItemsByGenre(string genre);
+        public Task<List<MediaItem>> SearchMediaItemsByTag(string tag);
     }
 }

ErsatzTV.Core/Interfaces/Repositories/ITelevisionRepository.cs

@@ -7,6 +7,7 @@ namespace ErsatzTV.Core.Interfaces.Repositories
 {
     public interface ITelevisionRepository
     {
+        Task<bool> AllShowsExist(List<int> showIds);
         Task<bool> Update(Show show);
         Task<bool> Update(Season season);
         Task<bool> Update(Episode episode);

ErsatzTV.Core/Metadata/LocalMetadataProvider.cs

@@ -146,6 +146,18 @@ namespace ErsatzTV.Core.Metadata
                     {
                         existing.Genres.Add(genre);
                     }
+
+                    foreach (Tag tag in existing.Tags.Filter(t => metadata.Tags.All(t2 => t2.Name != t.Name))
+                        .ToList())
+                    {
+                        existing.Tags.Remove(tag);
+                    }
+
+                    foreach (Tag tag in metadata.Tags.Filter(t => existing.Tags.All(t2 => t2.Name != t.Name))
+                        .ToList())
+                    {
+                        existing.Tags.Add(tag);
+                    }
                 },
                 () =>
                 {
@@ -188,6 +200,18 @@ namespace ErsatzTV.Core.Metadata
                     {
                         existing.Genres.Add(genre);
                     }
+
+                    foreach (Tag tag in existing.Tags.Filter(t => metadata.Tags.All(t2 => t2.Name != t.Name))
+                        .ToList())
+                    {
+                        existing.Tags.Remove(tag);
+                    }
+
+                    foreach (Tag tag in metadata.Tags.Filter(t => existing.Tags.All(t2 => t2.Name != t.Name))
+                        .ToList())
+                    {
+                        existing.Tags.Add(tag);
+                    }
                 },
                 () =>
                 {
@@ -250,7 +274,8 @@ namespace ErsatzTV.Core.Metadata
                         Tagline = nfo.Tagline,
                         Year = nfo.Year,
                         ReleaseDate = GetAired(nfo.Premiered) ?? new DateTime(nfo.Year, 1, 1),
-                        Genres = nfo.Genres.Map(g => new Genre { Name = g }).ToList()
+                        Genres = nfo.Genres.Map(g => new Genre { Name = g }).ToList(),
+                        Tags = nfo.Tags.Map(t => new Tag { Name = t }).ToList()
                     },
                     None);
             }
@@ -306,7 +331,8 @@ namespace ErsatzTV.Core.Metadata
                         Plot = nfo.Plot,
                         Outline = nfo.Outline,
                         Tagline = nfo.Tagline,
-                        Genres = nfo.Genres.Map(g => new Genre { Name = g }).ToList()
+                        Genres = nfo.Genres.Map(g => new Genre { Name = g }).ToList(),
+                        Tags = nfo.Tags.Map(t => new Tag { Name = t }).ToList()
                     },
                     None);
             }
@@ -358,6 +384,9 @@ namespace ErsatzTV.Core.Metadata
 
             [XmlElement("genre")]
             public List<string> Genres { get; set; }
+
+            [XmlElement("tag")]
+            public List<string> Tags { get; set; }
         }
 
         [XmlRoot("tvshow")]
@@ -383,6 +412,9 @@ namespace ErsatzTV.Core.Metadata
 
             [XmlElement("genre")]
             public List<string> Genres { get; set; }
+
+            [XmlElement("tag")]
+            public List<string> Tags { get; set; }
         }
 
         [XmlRoot("episodedetails")]