public int CreatePricingRule(PricingRule newRule)
{
if ((newRule.ToDate < DateTime.Now) || (newRule.Reduction > 100))
throw new PricingRuleException(StringsResource.InvalidPricingRule);
return dal.CreateEntity(newRule);
}
/// <summary>
/// Calculate the final price
/// </summary>
/// <param name="rules">Pricing rules to use</param>
/// <param name="listPrice">The list price to start with</param>
/// <returns></returns>
public double CalculatePrice(PricingRule[] rules, double listPrice)
{
//1. Find the best pricing rule. Only one rule can apply
PricingRule effectiveRule = (from rl in rules
orderby rl.Reduction descending
select rl).FirstOrDefault();
if (effectiveRule == null)
return listPrice;
//simple validation on the reduction
if ((effectiveRule.Reduction > 99) || (effectiveRule.ToDate < DateTime.Today))
throw new PricingException(StringsResource.InvalidPricingRule);
//The final calculation
return (listPrice * (100 - effectiveRule.Reduction)) / 100;
}