public static async Task <CityLocation> GetCityName(char latRef, double lat, char lonRef, double lon)
{
var cityLocation = new CityLocation();
AddressDetails addressDetailsInCache;
AddressDetails parentAddressDetailsInCache;
if (TryGetAddressComponentFromCache(latRef, lat, lonRef, lon, out addressDetailsInCache, out parentAddressDetailsInCache))
{
cityLocation = ParseCityNameAndInsertCache(addressDetailsInCache, new AddressResult());
}
else
{
var address = await LoadRawAddressFromServerAsync(latRef, lat, lonRef, lon).ConfigureAwait(false);
if (address.IsValid)
{
cityLocation = ParseCityNameAndInsertCache(address.Results[0], address);
}
else if (!string.IsNullOrWhiteSpace(parentAddressDetailsInCache.PlaceId))
{
cityLocation = ParseCityNameAndInsertCache(parentAddressDetailsInCache, new AddressResult());
}
}
return(cityLocation);
}
private static CityLocation ParseCityNameAndInsertCache(AddressDetails addressDetails, AddressResult addressResult)
{
var cityLocation = new CityLocation();
var areaLevel = string.Empty;
for (var i = addressDetails.AddressComponents.Length - 1; i > -1; i--)
{
var addressComponent = addressDetails.AddressComponents[i];
foreach (var addressType in addressComponent.Types)
{
if (addressType == CITY_LEVEL)
{
cityLocation.City = addressComponent.LongName;
}
else if (addressType == AREA_LEVEL2)
{
cityLocation.AreaLevel2 = addressComponent.LongName;
}
else if (addressType == AREA_LEVEL1)
{
cityLocation.AreaLevel1 = addressComponent.LongName;
}
else if (addressType == COUNTRY_LEVEL)
{
cityLocation.Country = addressComponent.LongName;
}
}
}
if (addressResult.IsValid)
{
if (string.IsNullOrWhiteSpace(cityLocation.City))
{
if (string.IsNullOrWhiteSpace(cityLocation.AreaLevel2))
{
if (string.IsNullOrWhiteSpace(cityLocation.AreaLevel1))
{
if (!string.IsNullOrWhiteSpace(cityLocation.Country))
{
areaLevel = COUNTRY_LEVEL;
}
}
else
{
areaLevel = AREA_LEVEL1;
}
}
else
{
areaLevel = AREA_LEVEL2;
}
}
else
{
areaLevel = CITY_LEVEL;
}
if (!string.IsNullOrWhiteSpace(areaLevel))
{
//Console.WriteLine(string.Format("[LocationCache]################ ParseCityNameAndInsertCache. AddressLevel: {0}", areaLevel));
InsertAddressComponentToCache(addressResult, areaLevel);
}
else
{
//Console.WriteLine("[LocationCache]################ ParseCityNameAndInsertCache. AddressLevel is empty");
}
if (addressDetails.Geometry.LocationType == LOCATION_TYPE_GEOMETRIC_CENTER)
{
areaLevel = addressDetails.Types[0];
InsertAddressComponentToCache(addressResult, areaLevel);
}
}
return(cityLocation);
}