public IEnumerable<GeoPoint> GetLocalCoords(GeoPoint geo)
{
var bounding = GeoCalculations.GetBoundingBoxMiles(new GeoCalculations.MapPoint {Latitude = geo.Lat, Longitude = geo.Long}, geo.Distance);
using (var cn = new MySqlConnection(_connectionString))
{//TODO: need to bound query with oblong coords to limit DB index lookup
cn.Open();
const string sql = "SELECT *,3956 * 2 * ASIN(SQRT(POWER(SIN((@Lat - `Lat`) * PI() / 180 / 2), 2) + COS(@Lat * PI() / 180) * COS(`Lat` *PI() / 180) * POWER(SIN((@Long - `Long`) * PI() / 180 / 2), 2) )) AS distance FROM `geopoints` WHERE `Long` BETWEEN @Long1 AND @long2 AND `Lat` BETWEEN @Lat1 AND @Lat2 HAVING distance < @Distance; ";
return cn.Query<GeoPoint>(sql, new {@Distance= geo.Distance, @Lat = geo.Lat, @Long = geo.Long, @Long1 = bounding.MinPoint.Longitude, @Long2 = bounding.MaxPoint.Longitude, @Lat1 = bounding.MinPoint.Latitude, @Lat2 = bounding.MaxPoint.Latitude});
}
}
public bool SaveCoords(GeoPoint geo, out int id)
{
id = -1;
using (var cn = new MySqlConnection(_connectionString))
{
using (var transaction = new TransactionScope())
{
const string sql = "INSERT INTO `geopoints` (`Long`, `Lat`) VALUES (@Long, @Lat);";
var success = cn.Execute(sql, new {Long = geo.Long, Lat = geo.Lat}) > 0;
var newId = cn.Query<ulong>("SELECT CAST(LAST_INSERT_ID() AS UNSIGNED INTEGER);").SingleOrDefault();
geo.ID = id = Convert.ToInt32(newId);
transaction.Complete();
return success;
}
}
}
private void PushPinDropNotification(GeoPoint point)
{
var hub = GlobalHost.ConnectionManager.GetHubContext<GeoHub>();
hub.Clients.Group("GeoPlacements").pinPlaced(point);
}
