private static Func <TransportServiceInformation, bool> YourCityPredicate(
INeedTransportServicesRequest message)
{
if (string.IsNullOrEmpty(message.YourCity))
{
return(x => true);
}
return(x => x.TransportFromCity == message.YourCity);
}
private static Func <TransportServiceInformation, bool> TransportTypePredicate(
INeedTransportServicesRequest message)
{
if (!message.TransportTypes.Any())
{
return(x => true);
}
return(x => message.TransportTypes.Contains(x.TransportType));
}
public static IEnumerable <Func <TransportServiceInformation, bool> > GetFor(
INeedTransportServicesRequest message)
{
yield return(TransportTypePredicate(message));
yield return(YourCountryPredicate(message));
yield return(YourCityPredicate(message));
yield return(ActivityPricePredicate(message));
}
public void Handle(INeedTransportServicesRequest message, AID sender)
{
List <TransportServiceInformation> transportServiceInformations = Services.GetFor(message).ToList();
SendMessage(
sender,
new FoundTransportServicesResponse
{
CorrelationId = message.CorrelationId,
Tranports = transportServiceInformations
});
}
public static IEnumerable <TransportServiceInformation> GetFor(
this IList <TransportServiceInformation> services,
INeedTransportServicesRequest message)
{
IEnumerable <TransportServiceInformation> query = services;
IEnumerable <Func <TransportServiceInformation, bool> > predicates = SearchPredicates.GetFor(message);
foreach (Func <TransportServiceInformation, bool> predicate in predicates)
{
query = query.Where(predicate);
}
return(query);
}
private static Func <TransportServiceInformation, bool> ActivityPricePredicate(INeedTransportServicesRequest message)
{
if (message.TransportPrice.IsNull())
{
return(x => true);
}
else if (message.TransportPrice.Min == null && message.TransportPrice.Max != null)
{
return(x => message.TransportPrice.Max >= x.Price);
}
else if (message.TransportPrice.Min != null && message.TransportPrice.Max == null)
{
return(x => message.TransportPrice.Min <= x.Price);
}
return(x => x.Price <= message.TransportPrice.Max && x.Price >= message.TransportPrice.Min);
}