static decimal GetStoredRate(string from, string to)
{
var result = webRates[from];
var obj = result["quotes"];
var val = (string)obj[from + to];
return(CurrencyParser.ParseCurrencyString(val));
}
public static decimal GetRate(string from, string to)
{
if (string.IsNullOrEmpty(urlKey) || from == to)
{
return(1.00M);
}
if (webRates.ContainsKey(from) &&
webRates[from].timestamp <= DateTimeOffset.UtcNow.ToUnixTimeSeconds() + 7200)
{
return(GetStoredRate(from, to));
}
try
{
var responce = GetWebCurrencyRate(from);
var rates = CurrencyParser.ParseCurrencyJSON(responce);
if (rates.success != "true")
{
return(FallBackRateCalculator());
}
webRates[from] = rates;
return(GetStoredRate(from, to));
}
catch
{
Toast.MakeText(Application.Context, "Some error occured!",
ToastLength.Short).Show();
return(1.00M);
}
decimal FallBackRateCalculator()
{
Toast.MakeText(Application.Context, $"Cannot get rate, trying to make a {from} to USD to {to} conversion!",
ToastLength.Short).Show();
decimal from_From_ToUsd = GetRate(urlFromCurrencyUSD, from);
decimal fromUSDTo_To_ = GetRate(urlFromCurrencyUSD, to);
return(fromUSDTo_To_ / from_From_ToUsd);
}
}
