public static HaikuRating MapHaikuRateDtoToHaikuRating(HaikuRatingDto dto)
{
return new HaikuRating()
{
Value = dto.Rating,
DateCreated = DateTime.Now
};
}
public async Task<HaikuRatedDto> RateAsync(int id, HaikuRatingDto dto)
{
var haiku = await this.unitOfWork.HaikusRepository.GetByIdAsync(id).ConfigureAwait(false);
var rating = Mapper.MapHaikuRateDtoToHaikuRating(dto);
haiku.Ratings.Add(rating);
// updating haiku rating
var oldHaikuRating = haiku.Rating;
haiku.RatingsCount++;
haiku.RatingsSum += rating.Value;
haiku.Rating = ((double) haiku.RatingsSum) / haiku.RatingsCount;
// updating user rating
var user = await this.unitOfWork.UsersRepository.GetByIdAsync(haiku.UserId);
if (oldHaikuRating == null)
{
user.HaikusRatingSum += haiku.Rating.Value;
user.HaikusCount++;
}
else
{
user.HaikusRatingSum = user.HaikusRatingSum- oldHaikuRating.Value + haiku.Rating.Value;
}
user.Rating = user.HaikusRatingSum / user.HaikusCount;
await this.unitOfWork.CommitAsync().ConfigureAwait(false);
return new HaikuRatedDto()
{
HaikuRating = haiku.Rating.Value
};
}
