public static async Task <decimal> ConvertValue(decimal value, string firstCurrency, string secondCurrency)
{
string url = "http://download.finance.yahoo.com/d/quotes?f=sl1d1t1&s=" +
firstCurrency + secondCurrency + "=X";
string result = "";
var conversion = new CurrencyCall("", 0, "", "");
try
{
var httpClient = new HttpClient();
httpClient.Timeout = TimeSpan.FromSeconds(5);
var request = new HttpRequestMessage(HttpMethod.Get, url);
var response = await httpClient.SendAsync(request);
result = await response.Content.ReadAsStringAsync();
string[] answer = result.Split(',');
conversion = new CurrencyCall(answer[0].Replace("\"", ""), decimal.Parse(answer[1]), answer[2].Replace("\"", ""), answer[3].Replace("\"", "").Replace("\n", ""));
//save time by saving currency rates
calls.Add(conversion);
Database.SaveCurrencyCall(conversion);
}
catch (Exception exception)
{
string currenciesToConvert = firstCurrency + secondCurrency + "=X";
Debug.WriteLine("OFFLINE CONVERSION");
Debug.WriteLine(exception);
conversion = Database.GetCurrencyCallRate(currenciesToConvert).ElementAt(0);
}
return(decimal.Multiply(conversion.rate, value));
}
public int SaveCurrencyCall(CurrencyCall item)
{
List <CurrencyCall> calls = database.Query <CurrencyCall>("SELECT * FROM [CurrencyCall] WHERE [currencies] = ?", item.currencies);
if (item.ID != 0 || calls.Count() > 0)
{
database.Update(item);
return(item.ID);
}
else
{
return(database.Insert(item));
}
}