public Pocket[] AutoSelectPockets(SmartLabel recipient)
{
var knownPockets = NonPrivatePockets.Where(x => x.Labels != CoinPocketHelper.UnlabelledFundsText).ToArray();
var unknownPockets = NonPrivatePockets.Except(knownPockets).ToArray();
var privateAndUnknownPockets = _allPockets.Except(knownPockets).ToArray();
var privateAndKnownPockets = _allPockets.Except(unknownPockets).ToArray();
var knownByRecipientPockets = knownPockets.Where(pocket => pocket.Labels.Any(label => recipient.Contains(label, StringComparer.OrdinalIgnoreCase))).ToArray();
var onlyKnownByRecipientPockets =
knownByRecipientPockets
.Where(pocket =>
pocket.Labels.Count() == recipient.Count() &&
pocket.Labels.All(label => recipient.Contains(label, StringComparer.OrdinalIgnoreCase)))
.ToArray();
if (onlyKnownByRecipientPockets.Sum(x => x.Amount) >= _targetAmount)
{
return(onlyKnownByRecipientPockets);
}
if (_privatePocket.Amount >= _targetAmount)
{
return(new[] { _privatePocket });
}
if (TryGetBestKnownByRecipientPockets(knownByRecipientPockets, _targetAmount, recipient, out var pockets))
{
return(pockets);
}
if (knownPockets.Sum(x => x.Amount) >= _targetAmount)
{
return(knownPockets);
}
if (unknownPockets.Sum(x => x.Amount) >= _targetAmount)
{
return(unknownPockets);
}
if (NonPrivatePockets.Sum(x => x.Amount) >= _targetAmount)
{
return(NonPrivatePockets);
}
if (privateAndKnownPockets.Sum(x => x.Amount) >= _targetAmount)
{
return(privateAndKnownPockets);
}
if (privateAndUnknownPockets.Sum(x => x.Amount) >= _targetAmount)
{
return(privateAndUnknownPockets);
}
return(_allPockets.ToArray());
}
private bool TryGetBestKnownByRecipientPockets(Pocket[] knownByRecipientPockets, Money targetAmount, SmartLabel recipient, [NotNullWhen(true)] out Pocket[]?pockets)
{
pockets = null;
if (knownByRecipientPockets.Sum(x => x.Amount) < _targetAmount)
{
return(false);
}
var privacyRankedPockets =
knownByRecipientPockets
.Select(pocket =>
{
var containedRecipientLabelsCount = pocket.Labels.Count(label => recipient.Contains(label, StringComparer.OrdinalIgnoreCase));
var totalPocketLabelsCount = pocket.Labels.Count();
var totalRecipientLabelsCount = recipient.Count();
var index = ((double)containedRecipientLabelsCount / totalPocketLabelsCount) + ((double)containedRecipientLabelsCount / totalRecipientLabelsCount);
return(acceptabilityIndex: index, pocket);
})
.OrderByDescending(tup => tup.acceptabilityIndex)
.ThenBy(tup => tup.pocket.Labels.Count())
.ThenByDescending(tup => tup.pocket.Amount)
.Select(tup => tup.pocket)
.ToArray();
var bestPockets = new List <Pocket>();
foreach (var p in privacyRankedPockets)
{
bestPockets.Add(p);
if (bestPockets.Sum(x => x.Amount) >= targetAmount)
{
break;
}
}
foreach (var p in bestPockets.OrderBy(x => x.Amount).ThenByDescending(x => x.Labels.Count()).ToImmutableArray())
{
if (bestPockets.Sum(x => x.Amount) - p.Amount >= targetAmount)
{
bestPockets.Remove(p);
}
else
{
break;
}
}
pockets = bestPockets.ToArray();
return(true);
}
