/// <summary>
/// Gets the multiple option chain for automatic expiry.
/// </summary>
/// <param name="cmd">The command.</param>
/// <returns>List of option chain.</returns>
private static async Task <List <TradierOptionChain> > GetMultipleOptionChainForAutoExpiry(TradierOptionChainCommand cmd)
{
var expirationDates = await new TradierOptionExpirationRequest(
new TradierOptionExpirationCommand(cmd, cmd.Symbol)).GetAsync();
var tasks = expirationDates.Take(cmd.ExpiryDateRangeLimit.Value)
.Select(date => new TradierOptionChainRequest(
new TradierOptionChainCommand(cmd, cmd.Symbol, date))
.GetAsync()).ToList();
var wholeData = new List <TradierOptionChain>();
await Task.WhenAll(tasks).ContinueWith(res =>
res.Result.ToList().ForEach(tResult => wholeData.AddRange(tResult)));
return(wholeData);
}
/// <summary>
/// Initializes a new instance of the <see cref="TradierOptionChainRequest"/> class.
/// </summary>
/// <param name="command">The command.</param>
/// <exception cref="ArgumentNullException">command</exception>
private TradierOptionChainRequest(TradierOptionChainCommand command)
: base(command?.BaseUrl, command.AccessKey)
{
Command = command ?? throw new ArgumentNullException(nameof(command));
}