public static List<Place> SearchPlaces(GpsCoordinates coordinates)
{
var places = new List<Place>();
var url = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location="
+ coordinates.Latitude + "," + coordinates.Longitude
+ "&radius=1000&key=AIzaSyB8g2JYH9TFBFvbbS_3AWlsUYpYaBWFWkw";
using (var client = new WebClient())
{
var results = JObject.Parse(client.DownloadString(url));
foreach (var result in results["results"])
{
places.Add(new Place()
{
Name = result["name"].ToString(),
Id = result["place_id"].ToString(),
Coordinates = new GpsCoordinates()
{
Latitude = (double)result["geometry"]["location"]["lat"],
Longitude = (double)result["geometry"]["location"]["lng"]
}
});
}
}
return places;
}
public static string GetMapsUrl(GpsCoordinates coordinates)
{
return ("https://www.google.com/maps/embed/v1/place?q="
+ coordinates.Latitude + "%C2%B0%20" + "%2C%20"
+ coordinates.Longitude + "%C2%B0%20"
+ "&key=AIzaSyB8g2JYH9TFBFvbbS_3AWlsUYpYaBWFWkw");
}
public static List<Place> GetClosestPlaces(List<Place> places, GpsCoordinates refPoint)
{
var distances = new Dictionary<Place, double>();
foreach (var place in places)
{
distances.Add(place, CalculateDistance(refPoint, place.Coordinates));
}
var topTen = distances.OrderBy(x => x.Value).Take(10).Select(x => x.Key).ToList();
return topTen;
}
private static double CalculateDistance(GpsCoordinates startLocation, GpsCoordinates destination)
{
var longitudeDif = destination.Longitude - startLocation.Longitude;
var latitudeDif = destination.Latitude - startLocation.Latitude;
var stepOne = Math.Pow(Math.Sin(latitudeDif / 2), 2) + Math.Cos(startLocation.Latitude) * Math.Cos(destination.Latitude) * Math.Pow(Math.Sin(longitudeDif / 2), 2);
var stepTwo = 2 * Math.Atan2(Math.Sqrt(stepOne), Math.Sqrt(1 - stepOne));
var distance = 6371 * stepTwo;
return distance;
}
