public Rating AddRating(int artistId, int fanId, int score)
{
using (var unitOfWork = new UnitOfWork())
{
RatingValidator ratingValidator = new RatingValidator();
var checkResult = ratingValidator.Check(score);
if (checkResult.Count != 0)
{
throw new InvalidModelException(String.Join("\n", checkResult.ToArray()));
}
var ratingRepository = unitOfWork.GetRepository <Rating>();
Rating foundRating = ratingRepository.GetAll().Where(r => r.ArtistId == artistId && r.FanId == fanId).FirstOrDefault();
Rating newRating = null;
if (foundRating != null)
{
foundRating.Score = score;
foundRating.Date = DateTime.Now;
ratingRepository.Update(foundRating);
newRating = foundRating;
FileOperations.SaveRatingDataToFile();
}
else if (foundRating == null)
{
newRating = ratingRepository.Add(new Rating {
ArtistId = artistId, FanId = fanId, Score = score, Date = DateTime.Now
});
FileOperations.AppendNewRatingLineToFile(fanId, artistId, score);
}
unitOfWork.Save();
return(newRating);
}
}