public async Task AttachGenreToMovie(int movieId, int genreId)
{
if (!await _movieRepository.IsMovieExists(movieId))
{
throw new MovieNotFound("Movie not found!");
}
if (!await _genreRepository.IsGenreExists(genreId))
{
throw new GenreNotFound("Genre not found!");
}
if (await _movieGenreRepository.IsGenreAlreadyAttachedToMovie(movieId, genreId))
{
throw new GenreAlreadyAttachedToMovie("Genre already attached to this movie!");
}
await _movieGenreRepository.Create(new MovieGenre
{
MovieId = movieId,
GenreId = genreId
});
}
