public static Purchase Build(StoreDB db, string[] barcodes)
{
return new Purchase() {
Products = Product.FindByBarcodes(db, barcodes),
Discounts = Discount.FindByBarcodes(db, barcodes)
};
}
public static void CreateOrUpdate(StoreDB db, string barcode, float amount)
{
Product product = Product.FindByBarcode(db, barcode);
Discount existing = db.Discounts.Where(p => p.Product.Id == product.Id).FirstOrDefault();
if (existing == null)
db.Discounts.Add(new Discount() { Product = product, Amount = amount });
else
existing.Amount = amount;
}
public static void CreateOrUpdate(StoreDB db, string barcode, string name, float price)
{
Product existing = db.Products.Where(p => p.Barcode == barcode).FirstOrDefault();
if (existing == null)
db.Products.Add(new Product() { Barcode = barcode, Name = name, Price = price });
else
{
existing.Name = name;
existing.Price = price;
}
}
public Store()
{
db = new StoreDB();
}
public static Discount[] FindByBarcodes(StoreDB db, string[] barcodes)
{
return barcodes.Select(x => FindByBarcode(db, x)).Where(x => x != null).ToArray();
}
public static Discount FindByBarcode(StoreDB db, string barcode)
{
return db.Discounts.Where(p => p.Product.Barcode == barcode).FirstOrDefault();
}
public static Product[] FindByBarcodes(StoreDB db, string[] barcodes)
{
return barcodes.Select(b => FindByBarcode(db, b)).ToArray();
}