public override IEnumerable <Discount> Process(CartContext cart)
{
List <Product> purchased_items = new List <Product>(cart.GetVisiblePurchasedItems(this.ExclusiveTag));
foreach (var d in this._discount_table)
{
var drinks = purchased_items.Where(p => p.Tags.Contains(d.drink)).OrderByDescending(p => p.Price).ToArray();
var foods = purchased_items.Where(p => p.Tags.Contains(d.food)).OrderByDescending(p => p.Price).ToArray();
if (drinks.Count() == 0)
{
continue;
}
if (foods.Count() == 0)
{
continue;
}
for (int i = 0; true; i++)
{
if (drinks.Length <= i)
{
break;
}
if (foods.Length <= i)
{
break;
}
if (purchased_items.Contains(drinks[i]) == false)
{
break;
}
if (purchased_items.Contains(foods[i]) == false)
{
break;
}
purchased_items.Remove(drinks[i]);
purchased_items.Remove(foods[i]);
yield return(new Discount()
{
Rule = this,
Products = new Product[] { drinks[i], foods[i] },
Amount = drinks[i].Price + foods[i].Price - d.price
});
}
}
}
public override IEnumerable <Discount> Process(CartContext cart)
{
List <Product> matched = new List <Product>();
foreach (var sku in cart.GetVisiblePurchasedItems(this.ExclusiveTag).Where(p => p.Tags.Contains(this.TargetTag)).Select(p => p.SKU).Distinct())
{
matched.Clear();
foreach (var p in cart.GetVisiblePurchasedItems(this.ExclusiveTag).Where(p => p.SKU == sku))
{
matched.Add(p);
if (matched.Count == 2)
{
yield return(new Discount()
{
Products = matched.ToArray(),
Amount = this.DiscountAmount,
Rule = this
});
matched.Clear();
}
}
}
}
public override IEnumerable <Discount> Process(CartContext cart)
{
List <Product> matched = new List <Product>();
foreach (var p in cart.GetVisiblePurchasedItems(this.ExclusiveTag).Where(p => p.Tags.Contains(this.TargetTag)).OrderByDescending(p => p.Price))
{
matched.Add(p);
if (matched.Count == 2)
{
yield return(new Discount()
{
Amount = matched.Sum(p => p.Price) * this.PercentOff / 100,
Products = matched.ToArray(),
Rule = this
});
matched.Clear();
}
}
}
public override IEnumerable <Discount> Process(CartContext cart)
{
List <Product> matched_products = new List <Product>();
foreach (var p in cart.GetVisiblePurchasedItems(this.ExclusiveTag))
{
matched_products.Add(p);
if (matched_products.Count == this.BoxCount)
{
// 符合折扣
yield return(new Discount()
{
Amount = matched_products.Select(p => p.Price).Sum() * this.PercentOff / 100,
Products = matched_products.ToArray(),
Rule = this,
});
matched_products.Clear();
}
}
}