public double?ConvertTo(double Value, IExchange exchange)
{
var key = exchange.CurrentUnit + "-" + exchange.TargetUnit;
var rate = _cache.Get(key);
double?result = null;
// Se mantiene condicional
if (rate != null)
{
_console.Write("Se encontro la tasa en el cache" + rate);
result = Value * double.Parse(rate);
}
else
{
_console.Write("No se encontro la tasa en el cache entonces la voy a buscar en internet");
string rateFromProvider;
try {
rateFromProvider = exchange.GetConversionRate(); // _http.Get("http://www.openexchangerates.com/?currencies="+key+"&value="+Value);
// constante para todos los convert
double conversionRate;
var isNumber = double.TryParse(rateFromProvider, out conversionRate);
if (isNumber)
{
_cache.Set(key, rateFromProvider);
result = Value * conversionRate;
return(result);
}
}
catch (THTTPException e) {
_console.Write(e.Message);
}
}
return(result);
}