public List <Credit> UpdateCredits(List <Credit> credits, Movie movie)
{
int movieId = movie.Id;
// First update the movie ids so we can correlate them later.
credits.ForEach(t => t.MovieId = movieId);
// Now find credits to delete, update and insert.
var existingCredits = _creditRepo.FindByMovieId(movieId);
// Should never have multiple credits with same credit_id, but check to ensure incase TMDB is on fritz
var dupeFreeCredits = credits.DistinctBy(m => m.CreditTmdbId).ToList();
dupeFreeCredits.ForEach(c => c.Id = existingCredits.FirstOrDefault(t => t.CreditTmdbId == c.CreditTmdbId)?.Id ?? 0);
var insert = dupeFreeCredits.Where(t => t.Id == 0).ToList();
var update = dupeFreeCredits.Where(t => t.Id > 0).ToList();
var delete = existingCredits.Where(t => !dupeFreeCredits.Any(c => c.CreditTmdbId == t.CreditTmdbId)).ToList();
_creditRepo.DeleteMany(delete);
_creditRepo.UpdateMany(update);
_creditRepo.InsertMany(insert);
return(credits);
}
