/// <summary>
/// Adding Promotional Rule.
/// </summary>
/// <param name="rule"></param>
public void AddPricingRule(PromotionRule rule)
{
if (rule == null)
{
throw new ArgumentNullException();
}
promotionRules.Add(rule);
}
/// <summary>
/// Logic to Calculate Price when Applying ]Pair-Promotional Rule(1A and 1B costs N Rs).
/// </summary>
/// <param name="total">Result of Calculations</param>
/// <param name="items">Total No. of SKU Items </param>
/// <param name="ruleForGroup">Promotional Rule to be applied</param>
/// <returns></returns>
public int Calculate(int total, List <Item> items, PromotionRule ruleForGroup)
{
var groupCount1 = items.Where(g => g.SKU == ruleForGroup.SKU).Count();
var groupCount2 = items.Where(g => g.SKU == ruleForGroup.SKU2).Count();
int count = 0;
while (groupCount1 > 0 && groupCount2 > 0)
{
count++;
groupCount1--;
groupCount2--;
}
total += count * ruleForGroup.Price;
total += groupCount1 * items.Where(x => x.SKU == ruleForGroup.SKU).Select(x => x.Price).FirstOrDefault();
total += groupCount2 * items.Where(x => x.SKU == ruleForGroup.SKU2).Select(x => x.Price).FirstOrDefault();
return(total);
}
/// <summary>
/// Logic to Calculate Price when Applying NPromotional Rule.
/// </summary>
/// <param name="total">Result of Calculations</param>
/// <param name="items">Total No. of SKU Items </param>
/// <param name="ruleForGroup">Promotional Rule to be applied</param>
/// <returns></returns>
public int Calculate(int total, List <Item> items, PromotionRule ruleForGroup)
{
var itemGroup = items.Where(g => g.SKU == ruleForGroup.SKU);
var groupCount = itemGroup.Count();
var extra = groupCount - ruleForGroup.ItemCount;
if (extra < 0)
{
total += itemGroup.Sum(g => g.Price);
}
else
{
total += (groupCount / ruleForGroup.ItemCount) * ruleForGroup.Price;
total += (groupCount % ruleForGroup.ItemCount) * itemGroup.First().Price;
}
return(total);
}
public void AddNewPromotionRule(PromotionRule promotionRule)
{
promotionRules.Add(promotionRule);
}
public Promotion(string promoName, PromotionRule rule)
{
promotionName = promoName;
Rule = rule;
}
