/// <summary>
/// This method is a facade which simplifies the placement of an order.
/// It orchestrates the steps needed to place an order.
/// The OrderPlacement process consists of a validation, price calculation and the storage of the order.
/// </summary>
/// <param name="articleId">The article id</param>
/// <param name="quantity">The quantity</param>
/// <returns>True if order was succesfully stored and will be shipped</returns>
public bool PlaceOrder(string articleId, int quantity)
{
Order order = new Order
{
ArticleId = articleId,
Quantity = quantity
};
// Validate order
bool result = OrderValidator.IsValidOrder(order);
// Calculate Price
result = result && CalculatePrice(order);
// Place Order
result = result & OrderStorage.PlaceOrder(order);
return(result);
}