public static XDocument downloadPrices(EveCentralUtility parameters)
{
UriBuilder url = new UriBuilder();
url.Scheme = "http";
url.Host = "api.eve-central.com";
url.Path = "api/quicklook";
url.Query = "typeid=" + parameters.Id +
"&usesystem=" + parameters.System +
"&sethour=" + parameters.Hours;
using (WebClient client = new WebClient())
return XDocument.Parse(client.DownloadString(url.ToString()));
}
public Security grabItem(int id, int station, int age)
{
try
{
EveCentralUtility parameters =
new EveCentralUtility(id, age, station);
Security security = fetchPrices(parameters,
this.downloadPrices,
this.downloadVolume);
return security;
}
catch (WebException exception)
{
// TODO: Recover from this
MessageBox.Show(exception.Message);
return null;
}
}
public static Security fetchPrices(EveCentralUtility parameters,
PriceDownloader downloadPrices,
VolumeDownloader downloadVolume)
{
XDocument xml = downloadPrices(parameters);
string name = xml.Descendants("itemname").First().Value;
Func<string, IEnumerable<double>> process =
(string type) => xml.Descendants(type)
.Descendants("order")
.Elements("price")
.Select(p => double.Parse(p.Value))
.DefaultIfEmpty(0);
double buy = process("buy_orders").Max();
double sell = process("sell_orders").Min();
int id = parameters.Id;
long volume = downloadVolume(id);
return new Security(id, name, buy, sell, volume);
}
