public override void Handle(Post post)
{
BindScope boundScope = new BindScope(Context, post);
if (Pred.Calc(boundScope).Bool)
{
post.XData.Matches = true;
base.Handle(post);
}
}
/// <summary>
/// Ported from forecast_posts::flush
/// </summary>
public override void Flush()
{
IList <Post> passed = new List <Post>();
Date last = TimesCommon.Current.CurrentDate;
// If there are period transactions to apply in a continuing series until
// the forecast condition is met, generate those transactions now. Note
// that no matter what, we abandon forecasting beyond the next 5 years.
//
// It works like this:
//
// Earlier, in forecast_posts::add_period_xacts, we cut up all the periodic
// transactions into their components postings, so that we have N "periodic
// postings". For example, if the user had this:
//
// ~ daily
// Expenses:Food $10
// Expenses:Auto:Gas $20
// ~ monthly
// Expenses:Food $100
// Expenses:Auto:Gas $200
//
// We now have 4 periodic postings in `pending_posts'.
//
// Each periodic postings gets its own copy of its parent transaction's
// period, which is modified as we go. This is found in the second member
// of the pending_posts_list for each posting.
//
// The algorithm below works by iterating through the N periodic postings
// over and over, until each of them mets the termination critera for the
// forecast and is removed from the set.
while (PendingPosts.Any())
{
// At each step through the loop, we find the first periodic posting whose
// period contains the earliest starting date.
PendingPostsPair least = PendingPosts.First();
foreach (PendingPostsPair i in PendingPosts)
{
if (!i.DateInterval.Start.HasValue)
{
throw new InvalidOperationException("Start is empty");
}
if (!least.DateInterval.Start.HasValue)
{
throw new InvalidOperationException("least.Start is empty");
}
if (i.DateInterval.Start < least.DateInterval.Start)
{
least = i;
}
}
// If the next date in the series for this periodic posting is more than 5
// years beyond the last valid post we generated, drop it from further
// consideration.
Date next = least.DateInterval.Next.Value;
if (next <= least.DateInterval.Start)
{
throw new InvalidOperationException("next <= least.DateInterval.Start");
}
if (((next - last).Days) > (365 * ForecastYears))
{
Logger.Current.Debug("filters.forecast", () => String.Format("Forecast transaction exceeds {0} years beyond today", ForecastYears));
PendingPosts.Remove(least);
continue;
}
// `post' refers to the posting defined in the period transaction. We
// make a copy of it within a temporary transaction with the payee
// "Forecast transaction".
Post post = least.Post;
Xact xact = Temps.CreateXact();
xact.Payee = "Forecast transaction";
xact.Date = next;
Post temp = Temps.CopyPost(post, xact);
// Submit the generated posting
Logger.Current.Debug("filters.forecast", () => String.Format("Forecast transaction: {0} {1} {2}", temp.GetDate(), temp.Account.FullName, temp.Amount));
base.Handle(temp);
// If the generated posting matches the user's report query, check whether
// it also fails to match the continuation condition for the forecast. If
// it does, drop this periodic posting from consideration.
if (temp.HasXData && temp.XData.Matches)
{
Logger.Current.Debug("filters.forecast", () => " matches report query");
BindScope boundScope = new BindScope(Context, temp);
if (!Pred.Calc(boundScope).Bool)
{
Logger.Current.Debug("filters.forecast", () => " fails to match continuation criteria");
PendingPosts.Remove(least);
continue;
}
}
// Increment the 'least', but remove it from pending_posts if it
// exceeds its own boundaries.
++least.DateInterval;
if (!least.DateInterval.Start.HasValue)
{
PendingPosts.Remove(least);
continue;
}
}
base.Flush();
}