private static void DeleteExample()
{
using var context = new MASContext();
context.City.Remove(context.City.FirstOrDefault() ?? throw new InvalidOperationException());
context.SaveChanges();
}
public static void New()
{
using (var context = new MASContext())
{
context.Menus.Add(new Menu(0.0d));
context.SaveChanges();
}
}
private static void UpdateExample()
{
using var context = new MASContext();
var city = context.City.FirstOrDefaultAsync();
city.Result.Name = "Warszawa";
context.City.Update(city.Result);
context.SaveChanges();
}
public static void Delete(Menu menu)
{
if (menu == null)
{
throw new Exception("Passed argument is null");
}
using (var context = new MASContext())
{
context.Menus.Remove(menu);
context.SaveChanges();
}
}
public static void AddIngredient(int dishId, double quantity, Ingredient ingredient)
{
using (var context = new MASContext())
{
var dish = context.Dishes.Include(a => a.DishIngredients).Where(x => x.Id == dishId).FirstOrDefault();
if (dish != null && !dish.DishIngredients.Any(a => a.IngredientId == ingredient.Id))
{
context.DishContents.Add(new DishContent(dish, ingredient, quantity));
context.SaveChanges();
}
}
}
public static void ChangePrices(Menu menu, double newMargin)
{
using (var context = new MASContext())
{
menu.ProfitMargin = newMargin;
context.Menus.Update(menu);
context.SaveChanges();
using (var transaction = context.Database.BeginTransaction())
{
var dishes = GetDishes(menu.Id);
if (dishes != null)
{
foreach (var dish in dishes)
{
DishService.ChangePrice(dish, newMargin);
}
}
transaction.Commit();
}
context.SaveChanges();
}
}
private static void AddExample()
{
using var context = new MASContext();
User person = new PremiumUser()
{
PasswordHash = "secret",
Name = "Michal",
CreatedAt = DateTime.Today,
Email = "*****@*****.**"
};
var city = new City
{
Name = "Piaseczno"
};
city.User.Add(person);
context.City.Add(city);
context.SaveChanges();
}
public static void ChangePrice(Dish dish, double newMargin)
{
using (var context = new MASContext())
{
double sum = 0.0;
var contents = context.DishContents.Include(a => a.Ingredient).Where(a => a.DishId == dish.Id).ToList();
foreach (var content in contents)
{
var quantity = (double)content.Quantity;
var pricePerKg = (double)content.Ingredient.PricePerKg;
sum += quantity * pricePerKg;
}
sum += sum * newMargin;
dish.Price = (Decimal)sum;
Dish EditedDish = context.Dishes.Where(a => a.Id == dish.Id).FirstOrDefault();
EditedDish.Price = (Decimal)Math.Round(sum, 2);
context.Update(EditedDish);
context.SaveChanges();
}
}
