private QuoteUser Add(QuoteUser quoteUser)
{
Func <QuoteUser, bool> predicate = (q) => q.QuoteId == quoteUser.QuoteId;
if (QuotesUser.Any(predicate))
{
var quoteU = QuotesUser.First(predicate);
quoteU.Number += quoteUser.Number;
return(quoteU);
}
else
{
QuotesUser.Add(quoteUser);
return(quoteUser);
}
}
public QuoteUser Buy(Quote quote, int number)
{
CheckNumber(number);
var value = quote.Value * number;
Account.DrawOut(value);
var quoteUser = new QuoteUser()
{
Id = Guid.NewGuid().ToString(),
QuoteId = quote.Id,
UserId = Id,
Number = number
};
return(Add(quoteUser));
}