public async Task <List <GeocodeResult> > ExecuteQuery(string query)
{
query = Uri.EscapeUriString(query);
string URL =
String.Format(
"http://open.mapquestapi.com/nominatim/v1/search?format=xml&q={0}&addressdetails=0&limit={1}&countrycodes=at&exclude_place_ids=613609",
query,
15); // max. results to return, possibly make this configurable
string response = "";
using (var client = new HttpClient())
{
response = await client.GetStringAsync(URL);
client.Dispose();
}
var searchresults = XElement.Parse(response);
var mapped = searchresults.Elements("place")
.Select(e => new GeocodeResult()
{
Name = (string)e.Attribute("display_name"),
Longitude = MappingHelpers.ConvertDouble((string)e.Attribute("lon")),
Latitude = MappingHelpers.ConvertDouble((string)e.Attribute("lat")),
})
.ToList();
return(mapped);
}
//
// Copy/Paste Sample: http://open.mapquestapi.com/nominatim/v1/reverse?format=xml&lat=51.521435&lon=-0.162714
//
public async Task <GeocodeResult> ReverseGeocode(double latitude, double longitude)
{
string URL =
String.Format(
"http://open.mapquestapi.com/nominatim/v1/reverse?format=xml&lat={0}&lon={1}",
latitude.ToString(CultureInfo.InvariantCulture),
longitude.ToString(CultureInfo.InvariantCulture));
string response = "";
using (var client = new HttpClient())
{
response = await client.GetStringAsync(URL);
client.Dispose();
}
var searchresults = XElement.Parse(response);
var resElement = searchresults.Elements("result").FirstOrDefault();
var addressElement = searchresults.Elements("addressparts").FirstOrDefault();
if (resElement != null && addressElement != null)
{
var countryCode = (string)addressElement.Element("country_code");
if (0 == String.Compare("at", countryCode, StringComparison.OrdinalIgnoreCase))
{
// Only if City or Town is not available, we will fall back to the actual location name
string locationName = (string)addressElement.Element("city");
if (String.IsNullOrWhiteSpace(locationName))
{
locationName = (string)addressElement.Element("town");
if (String.IsNullOrWhiteSpace(locationName))
{
locationName = (string)resElement;
}
}
var result = new GeocodeResult()
{
Name = locationName,
Latitude = MappingHelpers.ConvertDouble((string)resElement.Attribute("lat")),
Longitude = MappingHelpers.ConvertDouble((string)resElement.Attribute("lon"))
};
return(result);
}
}
return(null);
}
public async Task <GasQueryDownloadResult> DownloadAsync(GasQuery parameter)
{
// Prepare POST data
string postData = Uri.EscapeUriString(parameter.ToPostData());
var ascii = new UTF8Encoding();
byte[] bData = ascii.GetBytes(postData);
var content = new ByteArrayContent(bData);
content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
List <RootObject> result = null;
try
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("*/*"));
client.DefaultRequestHeaders.Referrer = new Uri("http://spritpreisrechner.at/ts/map.jsp");
HttpResponseMessage response = await client.PostAsync(URL, content);
string json = await response.Content.ReadAsStringAsync();
result = JsonConvert.DeserializeObject <List <RootObject> >(json);
}
}
catch (Exception ex)
{
return(new GasQueryDownloadResult()
{
Succeeded = false,
ErrorMessage = ex.ToString(),
Result = new GasQueryResult(parameter)
});
}
// Errors are reported in a rather weird way so let's be extra careful in retrieving those
if (result.Count == 1)
{
var firstItem = result.First();
if (firstItem != null)
{
var errorItems = firstItem.errorItems;
if (errorItems != null && errorItems.Count > 0 && errorItems.First() != null)
{
return(new GasQueryDownloadResult()
{
Succeeded = false,
ErrorMessage = errorItems.First().msgText,
Result = new GasQueryResult(parameter)
});
}
}
}
var foundTanken = new List <GasStationResult>();
foreach (var ro in result)
{
if (null == ro)
{
continue;
}
if (!String.IsNullOrWhiteSpace(ro.gasStationName))
{
var tanke = new GasStationResult()
{
City = ro.city,
PostalCode = ro.postalCode,
Street = ro.address,
Name = ro.gasStationName,
Longitude = MappingHelpers.ConvertDouble(ro.longitude),
Latitude = MappingHelpers.ConvertDouble(ro.latitude),
};
if ((null != ro.spritPrice) && ro.spritPrice.Count > 0)
{
var preisInfo = ro.spritPrice.First();
if ((null != preisInfo) && !String.IsNullOrWhiteSpace(preisInfo.amount))
{
tanke.Price = MappingHelpers.ConvertDouble(preisInfo.amount);
foundTanken.Add(tanke);
}
}
}
}
var orderedTanken = foundTanken.OrderBy(t => t.Price).ToList();
int tankeOrderNumber = 1;
foreach (var tanke in orderedTanken)
{
tanke.UniqueId = tankeOrderNumber.ToString();
tankeOrderNumber++;
}
return(new GasQueryDownloadResult()
{
Succeeded = true,
Result = new GasQueryResult(parameter, orderedTanken, DateTime.Now)
});
}