private async Task <bool> ConditionMet(FlightPurchaseDto flightPurchase, Domain.Entities.PriceDiscount discount)
{
var purchases = new List <FlightPurchaseDto>();
purchases.Add(flightPurchase);
var query = purchases.AsQueryable();
var queryString = string.Empty;
queryString = await BuildQueryString(discount, queryString);
if (string.IsNullOrEmpty(queryString) || query.Where(queryString).Any())
{
return(true);
}
return(false);
}
private async Task CheckConditionsAndApply(Domain.Entities.PriceDiscount discount, FlightPurchaseDto purchaseDto, Domain.Entities.FlightPurchase purchase)
{
// minimalna cena 20
if (purchase.Price - 5 < 20)
{
return;
}
if (await ConditionMet(purchaseDto, discount))
{
purchase.Price -= 5;
// zapis zniżek dla danej grupy
if (purchaseDto.TenantGroup == Domain.Enums.TenantGroup.A)
{
purchase.Discounts.Add(discount);
}
}
}
private Task <string> BuildQueryString(Domain.Entities.PriceDiscount discount, string queryString)
{
foreach (var r in discount.Rules)
{
if (discount.Rules.IndexOf(r) == 0)
{
queryString += "(";
}
queryString += $"{r.FieldName} = \"{r.Value}\"";
if (discount.Rules.IndexOf(r) == discount.Rules.Count - 1)
{
queryString += ")";
break;
}
queryString += " and ";
}
return(Task.FromResult(queryString));
}
