private Location NextLocation(Location origin)
{
var next = RandomLocation();
while (next.Name == origin.Name)
{
next = RandomLocation();
}
return next;
}
private static Route MapRoute(Location origin, Location destination, DirectionsResponse result)
{
var points = result.Routes.First()
.Legs.SelectMany(leg => leg.Steps)
.Select(step => new RouteLeg(
new Position(step.StartLocation.Latitude, step.StartLocation.Longitude),
new Position(step.EndLocation.Latitude, step.EndLocation.Longitude),
step.Distance.Value))
.ToArray();
return new Route(origin, destination, points);
}
public async Task<Route> PlanNewRoute(Location origin)
{
var destination = NextLocation(origin);
var request = new DirectionsRequest
{
Origin = origin.Name,
Destination = destination.Name,
TravelMode = TravelMode.Driving
};
return await CallGoogleService(origin, request, destination);
}
private static async Task<Route> CallGoogleService(Location origin, DirectionsRequest request, Location destination)
{
var count = 0;
while (count < 3)
{
try
{
var result = await GoogleMaps.Directions.QueryAsync(request);
if (result.Status == DirectionsStatusCodes.OK)
{
return MapRoute(origin, destination, result);
}
}
catch (Exception exception)
{
Console.WriteLine("Error while contacting the google service: " + exception.ToString());
}
count ++;
}
throw new InvalidOperationException("Could not contact the Google service after 3 times.");
}