public async Task <List <Movie> > GetRecommendedMovies(string userID) { MongoDBManager mm = new MongoDBManager(); List <Movie> movies = new List <Movie>(); Dictionary <string, int> actors = new Dictionary <string, int>(); UserInformation user = await mm.GetUserInformation(userID); if (user == null) { return(movies); } foreach (var movieLike in user.MovieLikes)//get user favourite genra { var movie = await mm.GetMovie(movieLike.Id); List <string> movieActors = movie.Actors; foreach (var movieActor in movieActors) { if (!actors.ContainsKey(movieActor)) { actors.Add(movieActor, 0); } actors[movieActor]++; } } var max = actors.Values.Max(); string favouriteActor = ""; foreach (var actor in actors.Keys) { if (actors[actor] == max) { favouriteActor = actor; break; } } movies = await mm.GetMoviesWithActor(favouriteActor); List <Movie> moviesWithoutUserLiked = new List <Movie>(); foreach (var movie in movies) { bool exist = false; foreach (var userLiked in user.MovieLikes) { if (userLiked.Id == movie.ID) { exist = true; break; } } if (!exist) { moviesWithoutUserLiked.Add(movie); } } MoviesSort ms = new MoviesSort(); moviesWithoutUserLiked.Sort(ms); return(moviesWithoutUserLiked); }