private Task <MapsResult> FindFlightRouteAsync(TravelRequestData data)
{
// Setup Flight Calculator Crawling
var baseUrl = $"https://www.travelmath.com/flying-time";
var parameters = new Dictionary <string, string>()
{
{ "from", data.From },
{ "to", data.To }
};
var url = baseUrl + "/" + string.Join('/', parameters.Select(pair => $"{pair.Key}/{pair.Value}"));
// Get response
var client = new RestClient(url);
var response = client.Execute(new RestRequest());
var sourceCode = response.Content;
// Find flight time
const string regex = "<h3 class=\"space\" id=\"flyingtime\">((\\d+) hours?, )?(\\d+) minutes?</h3>";
var match = Regex.Match(sourceCode, regex);
var hours = int.Parse(string.IsNullOrEmpty(match.Groups[2].Value) ? "0" : match.Groups[2].Value);
var minutes = int.Parse(match.Groups[3].Value);
var time = new TimeSpan(hours, minutes, 0) + new TimeSpan(0, 40, 0);
var result = new MapsResult()
{
Original_time = time.Hours + (time.Minutes / 60.0),
Departure = data.From,
Destination = data.To,
LocationUrl = null,
Method = "Flight"
};
return(Task.FromResult(result));
}
private Task <MapsResult> FindTransitAlternativeAsync(TravelRequestData data)
{
// Call Google API
var baseUrl = $"https://maps.googleapis.com/maps/api/directions/json?key={GoogleApiKey}";
var parameters = new Dictionary <string, string>()
{
{ "origin", data.From },
{ "destination", data.To },
//{ "departure_time", "now" },
{ "departure_time", ((DateTimeOffset)data.Date.AddHours(9)).ToUnixTimeSeconds().ToString() },
{ "mode", "transit" }
};
var url = baseUrl + "&" + string.Join('&', parameters.Select(pair => $"{pair.Key}={pair.Value}"));
// Get response
var client = new RestClient(url);
var response = client.Execute(new RestRequest());
dynamic result = JsonConvert.DeserializeObject(response.Content);
// Parse response
if (result.status != "OK" || result.routes.Count == 0)
{
throw new AlternativeNotFoundException();
}
MapsResult bestResult = null;
foreach (var route in result.routes)
{
var leg = route.legs[0];
var time = leg.duration.value / 3600.0;
if (bestResult != null && time > bestResult.Travel_time)
{
continue;
}
// Prepare result
bestResult = new MapsResult()
{
Travel_time = time,
Departure = leg.start_address,
Destination = leg.end_address,
Method = "Transit",
LocationUrl = $"https://www.google.com/maps/dir/{leg.start_address}/{leg.end_address}/"
};
}
if (bestResult == null)
{
throw new AlternativeNotFoundException();
}
return(Task.FromResult(bestResult));
}
public async Task <ServiceResponseModel> EvaluateAsync(string request, IDictionary <string, string> data)
{
var requestData = new TravelRequestData(data);
var flightRoute = await FindFlightRouteAsync(requestData);
var transitRoute = await FindTransitAlternativeAsync(requestData);
var saving = await CalculateSavingAsync(transitRoute, flightRoute);
transitRoute.Original_time = flightRoute.Original_time + 2;
return(new ServiceResponseModel()
{
Alternative_found = true,
Alternative_saving = saving,
Alternative_url = transitRoute.LocationUrl,
Alternative_data = transitRoute.ToDictionary()
});
}
