/// <summary>
/// Reduce ingradient weight from database.
/// </summary>
/// <param name="ingradientName">Name ingradient.</param>
/// <param name="reduceWeight">Reduce weight shawarma ingradients.</param>
public static void ReduceIngradient(string ingradientName, int reduceWeight)
{
if (IsNullOrEmpty(ingradientName))
{
throw new ArgumentException();
}
using (var ctx = new ShawarmaEntities())
{
Ingradient ingradient = ctx.Ingradients
.FirstOrDefault(ingr => ingr.IngradientName == ingradientName);
if (ingradient?.TotalWeight < reduceWeight)
{
throw new ArgumentException();
}
Debug.Assert(ingradient != null, "ingradient != null");
ingradient.TotalWeight -= reduceWeight;
ctx.Ingradients.AddOrUpdate(ingradient);
ctx.SaveChanges();
}
}
/// <summary>
/// Add new ingradient in database.
/// </summary>
/// <param name="ingradientName">Name new ingradient.</param>
/// <param name="totalWeight">Total weight shawarma ingradients.</param>
/// <param name="idIngradientCategory">Id ingradient category name.</param>
public static void AddIngradient(string ingradientName, int totalWeight, int idIngradientCategory)
{
if (IsNullOrEmpty(ingradientName))
{
throw new ArgumentException();
}
using (var ctx = new ShawarmaEntities())
{
int maxId = ctx.IngradientCategories.Select(s => s.CategoryId).Max();
if (idIngradientCategory <= 0 || idIngradientCategory > maxId)
{
idIngradientCategory = 1;
}
Ingradient ingradient = new Ingradient {
IngradientName = ingradientName, TotalWeight = totalWeight, CategoryId = idIngradientCategory
};
ctx.Ingradients.Add(ingradient);
ctx.SaveChanges();
}
}
