public IObservable <IEnumerable <Flight> > GetFlightsFrom(Airport fromAirport)
{
var airports = new AirportNamesService().GetAirports();
var airlines = new AirlineNamesService().GetAirlines();
var statuses = new StatusService().GetStautses();
var referenceData = airports
.ForkJoin(airlines, (allAirports, allAirlines) =>
{
Airports.AddRange(allAirports);
Airlines.AddRange(allAirlines);
return(new Unit());
})
.ForkJoin(statuses, (nothing, allStatuses) =>
{
Statuses.AddRange(allStatuses);
return(new Unit());
});
string url = string.Format(_serviceUrl, 1, 5, fromAirport.Code);
var flights = from data in referenceData
from flight in GetFlightsFrom(url)
select flight;
return(flights);
}
public void GetFlightsFrom(Action <Result <IEnumerable <Flight> > > callback, Airport fromAirport)
{
if (Airports.Count == 0)
{
_airportService.GetAirports(r => {
if (r.HasError())
{
callback(new Result <IEnumerable <Flight> >(r.Error));
}
Airports.AddRange(r.Value);
GetFlightsIfAllDone(callback, fromAirport);
});
}
if (Airlines.Count == 0)
{
_airlineService.GetAirlines(r =>
{
if (r.HasError())
{
callback(new Result <IEnumerable <Flight> >(r.Error));
}
Airlines.AddRange(r.Value);
GetFlightsIfAllDone(callback, fromAirport);
});
}
if (Statuses.Count == 0)
{
_statusService.GetStautses(r =>
{
if (r.HasError())
{
callback(new Result <IEnumerable <Flight> >(r.Error));
}
Statuses.AddRange(r.Value);
GetFlightsIfAllDone(callback, fromAirport);
});
}
GetFlightsIfAllDone(callback, fromAirport);
}