public Promotion(AddPromotionRequestModel promotionRequest)
: this()
{
StartDate = promotionRequest.StartDate;
EndDate = promotionRequest.EndDate;
NewPrice = promotionRequest.NewPrice;
}
public static IEnumerable <string> Validate(this AddPromotionRequestModel promotion)
{
if (promotion.StartDate <= DateTime.Today)
{
yield return("Start date can't be in the past.");
}
if (promotion.StartDate > promotion.EndDate)
{
yield return("Start date can't be higher than the end date.");
}
if (promotion.NewPrice < 0)
{
yield return("Price cannot be negative.");
}
}
