public void RateMeal(Guid userId, Guid mealId, double value)
{
using (var tr = new TransactionScope())
{
var rating = Session.MealRatings.SingleOrDefault(r => r.RatedById == userId && r.RatedMealId == mealId);
if (rating == null)
{
rating = new MealRating()
{
Id = Guid.NewGuid(),
RatedById = userId,
RatedMealId = mealId
};
Session.MealRatings.Add(rating);
}
rating.Rating = value;
Session.SaveChanges();
var meal = Get(mealId);
meal.AverageRating = Session.MealRatings.Where(r => r.RatedMealId == mealId).Average(r => r.Rating);
Session.SaveChanges();
tr.Complete();
}
}
private async void FetchMealRatingByUser()
{
try
{
MealRating mealRating = await service.GetMealRatingByUser(UserCache.user.Id, MealId);
if (mealRating != null && mealRating.RatingId > 0)
{
//This user has already submitted a rating or a grade.
MyMealsDetailGradeUserSubmittedValue.Text = PhraseHelper.GetGradePhrase(Convert.ToInt32(mealRating.Grade));
MyMealsDetailsSubmittedGradeSection.Visibility = ViewStates.Visible;
MyMealsDetailsGradingSection.Visibility = ViewStates.Gone;
}
else
{
MyMealsDetailsSubmittedGradeSection.Visibility = ViewStates.Gone;
MyMealsDetailsGradingSection.Visibility = ViewStates.Visible;
}
}
catch (Exception ex)
{
string err = ex.Message;
}
}
