public void RemoveSKU(DataModel.SKU sku)
{
sku.Delete();
SKUList.Remove(SKUList.First(s => s.Id == sku.Id));
foreach (var c in SKUCollectionList)
{
var match = c.SKUs.FirstOrDefault(s => s.Id == sku.Id);
if (match != null)
{
c.SKUs.Remove(match);
}
}
NotifyPropertyChanged(() => SKUList);
NotifyPropertyChanged(() => SKUCollectionList);
}
public void Import(string filename)
{
var skus = DataModel.SKU.LoadAllFromFile(filename);
foreach (var sku in skus)
{
var match = SKUList.FirstOrDefault(s => s.Code == sku.Code);
if (match != null)
{
sku.Id = match.Id; // Update existing ones.
}
sku.Save();
}
SKUList = new ObservableCollection <DataModel.SKU>(skus);
}
public (decimal actualPrice, decimal promoPrice) PromoCalculator()
{
decimal actualPrice = 0m, promoPrice = 0m, sku1Price = 0m, sku2Price = 0m;
bool promoApplied = false;
try
{
foreach (var cartItem in CartList.FindAll(c => !c.IsCheckedOut))
{
promoApplied = false;
sku1Price = SKUList.Find(sku => sku.SKUId == cartItem.SKU).SKUPrice;
actualPrice += sku1Price * cartItem.Quantity;
//If item is already checkedout, pick next.
if (cartItem.IsCheckedOut)
{
continue;
}
foreach (var promotion in PromoList)
{
//For promotions with single SKU item
if (promotion.SKU2.Equals('\0'))
{
if (promotion.SKU1 == cartItem.SKU && promotion.SKU1Unit <= cartItem.Quantity)
{
//Items with promo
promoPrice += promotion.PromoPrice * (cartItem.Quantity / promotion.SKU1Unit);
//Items without promo
promoPrice += (cartItem.Quantity % promotion.SKU1Unit) * sku1Price;
promoApplied = true;
//Check out items
cartItem.IsCheckedOut = true;
break;
}
}
//For promotions with multiple SKU items
else
{
if (promotion.SKU1 == cartItem.SKU && promotion.SKU1Unit <= cartItem.Quantity)
{
foreach (var cartItem2 in CartList.FindAll(c => !c.IsCheckedOut))
{
if (promotion.SKU2 == cartItem2.SKU && promotion.SKU2Unit <= cartItem2.Quantity)
{
sku2Price = SKUList.Find(sku => sku.SKUId == cartItem2.SKU).SKUPrice;
//Number of times a given promotion needs to be applied.
var totalPromo = Math.Min((cartItem.Quantity / promotion.SKU1Unit), (cartItem2.Quantity / promotion.SKU2Unit));
//SKU1 and SKU2 items wit promo
promoPrice += promotion.PromoPrice * totalPromo;
//SKU1 items without promo
promoPrice += (cartItem.Quantity % promotion.SKU1Unit) * sku1Price;
//SKU2 items without promo
promoPrice += (cartItem2.Quantity % promotion.SKU2Unit) * sku2Price;
promoApplied = true;
//Check out items
cartItem.IsCheckedOut = true;
CartList.Find(c => c.SKU == cartItem2.SKU).IsCheckedOut = true;
cartItem2.IsCheckedOut = true;
break;
}
}
}
}
}
//When no promotion is applied, calculate actual price
if (!promoApplied)
{
promoPrice += (cartItem.Quantity) * sku1Price;
}
}
}
catch (Exception)
{
throw;
}
return(actualPrice, promoPrice);
}
