/// <summary>
/// Request Google Directions
/// <param name="request">Request object</param>
/// <returns>The response model</returns>
/// </summary>
public async Task <OperationResult <DirectionsResponse> > RequestDirections(DirectionsRequest request)
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Add("Content-Type", "application/json;charset=utf-8");
var result = DirectionsUrlFactory.BuildDirectionsUrl(request, _apiKey);
if (result.IsSuccessful)
{
var fullUrlString = result.Result;
var responseString = await client.GetStringAsync(fullUrlString);
return(await ProcessResponse(responseString));
}
else
{
return(OperationResult <DirectionsResponse> .AsFailure(result.Exception));
}
}
}
/// <summary>
/// Request Google Directions
/// <param name="request">Request object</param>
/// <returns>The response model</returns>
/// </summary>
public async Task <OperationResult <DirectionsResponse> > RequestDirections(DirectionsRequest request)
{
using (var client = new HttpClient())
{
AcceptJsonResponse(client);
var result = DirectionsUrlFactory.BuildDirectionsUrl(request, _apiKey);
if (result.IsSuccessful)
{
var fullUrlString = result.Result;
var response = await client.GetAsync(fullUrlString).ConfigureAwait(false);
if (!response.IsSuccessStatusCode)
{
return(OperationResult <DirectionsResponse> .AsFailure(response.ReasonPhrase));
}
var content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
return(await ProcessResponse(content));
}
return(OperationResult <DirectionsResponse> .AsFailure(result.Exception));
}
}
/// <summary>
/// Constructs a Google Directions URL string based on the <paramref name="request"/> and <paramref name="apiKey"/> parameters.
/// Note that the <paramref name="request"/> parameter must contain a value for OriginCoordinates
/// </summary>
/// <param name="request"></param>
/// <param name="apiKey"></param>
/// <returns></returns>
public static OperationResult <string> BuildDirectionsUrl(DirectionsRequest request, string apiKey)
{
if (request == null || request.OriginCoordinates == null)
{
return(OperationResult <string> .AsFailure("Invalid request parameter specified. Please make sure to specify the OriginCoordinates"));
}
if (string.IsNullOrEmpty(apiKey))
{
return(OperationResult <string> .AsFailure("Invalid Api key specified"));
}
var result = new StringBuilder();
//URL
result.Append(_googleDirectionsApiBaseUrl);
//Origin
var originString = request.OriginAddress;
if (request.OriginPlaceId != null)
{
originString = $"place_id:{request.OriginPlaceId}";
}
else if (request.OriginCoordinates != null)
{
originString = $"{request.OriginCoordinates.Item1},{request.OriginCoordinates.Item2}";
}
result.Append($"&origin={originString}");
//Destination
var destinationString = request.DestinationAddress;
if (request.DestinationPlaceId != null)
{
destinationString = $"place_id:{request.DestinationPlaceId}";
}
else if (request.DestinationCoordinates != null)
{
destinationString = $"{request.DestinationCoordinates.Item1},{request.DestinationCoordinates.Item2}";
}
result.Append($"&destination={destinationString}");
//Departure Time
result.Append("&departure_time=now");
//Travel Mode
result.Append($"&mode={request.Mode.ToString().ToLower()}");
//Tolls
if (request.AvoidTolls)
{
result.Append("&avoid=tolls");
}
//Unit Type
result.Append($"&units={request.UnitType.ToString().ToLower()}");
//Region
result.Append($"®ion={request.Region.ToLower()}");
//Traffic Model
result.Append($"&traffic_model={request.TrafficModel.Humanize().ToLower()}");
//API Key
result.Append($"&key={apiKey}");
//Sensor
result.Append("&sensor=false");
//Add Waypoints
if (request.Waypoints?.Count > 0)
{
result.Append("&waypoints=");
request.Waypoints.ForEach((waypoint) =>
{
if (!waypoint.IsStopover)
{
result.Append("via:");
}
result.Append($"{waypoint.Latitude},{waypoint.Longitude}");
});
}
return(OperationResult <string> .AsSuccess(result.ToString()));
}