public async Task <int> RateMovieAsync(int movieId, int userId, int rating)
{
if (rating < 1 || rating > 5)
{
throw new InvalidRatingException(rating);
}
var movieGetter = movieRepository.Get(movieId);
var userGetter = userRepository.Get(userId);
if (await movieGetter == null)
{
throw new MovieNotFoundException(movieId);
}
if (await userGetter == null)
{
throw new UserNotFoundException(userId);
}
var ratingSavedResult = await movieRatingRepository.UpsertAsync(new MovieRating
{
MovieId = movieId,
UserId = userId,
Rating = rating
});
var ratings = await movieRatingRepository.GetByMovieId(movieId);
var roundedAverageRating = Rounder.Round(ratings.Average(x => x.Rating));
return(await movieRepository.UpdateAverageRating(movieId, roundedAverageRating));
}
