private ZoneInfoPathNode(
IZoneInfo zoneInfo,
Func <IZoneInfoPathNode, QueryResult <IZoneInfo, RelativeZoneInfoQuery>, bool> canBeJoinedFunc,
Func <IZoneInfo, int?> getDestinationHashCode,
IZoneInfoPathNode previousPathNode,
IZoneInfoPathNode originParentPathNode,
int distance,
ZoneInfoDistanceTracker distanceTracker)
{
ZoneInfo = zoneInfo;
PreviousPathNode = previousPathNode;
_originParentPathNode = originParentPathNode ?? this;
DestinationHashCode = getDestinationHashCode(zoneInfo);
Distance = distance;
_childPathsLazy = new Lazy <List <IZoneInfoPathNode> >(() =>
!distanceTracker.IsPreviouslyNotSeenOrSeenAtLargerDistance(ZoneInfo, distance, previousPathNode)
? Enumerable.Empty <IZoneInfoPathNode>().ToList()
: ZoneInfo
.GetNorthEastSouthWest()
.Where(x => x.HasMatch)
.Where(x => x.MatchingObject != PreviousPathNode?.ZoneInfo)
.Where(x => distanceTracker.DoesNotExceedMaximumDistanceForAllCriteria(ZoneInfo, distance))
.Where(x => canBeJoinedFunc(this, x))
.Select(x => new ZoneInfoPathNode(
zoneInfo: x.MatchingObject,
canBeJoinedFunc: canBeJoinedFunc,
getDestinationHashCode: getDestinationHashCode,
previousPathNode: this,
originParentPathNode: _originParentPathNode,
distance: Distance + x.MatchingObject.GetDistanceScoreBasedOnConsumption(),
distanceTracker: distanceTracker
))
.ToList <IZoneInfoPathNode>());
}
public ZoneInfoPathNode(IZoneInfo zoneInfo, Func <IZoneInfoPathNode, QueryResult <IZoneInfo, RelativeZoneInfoQuery>, bool> canBeJoinedFunc, Func <IZoneInfo, int?> getDestinationHashCode, ZoneInfoDistanceTracker distanceTracker)
: this(
zoneInfo : zoneInfo,
canBeJoinedFunc : canBeJoinedFunc,
getDestinationHashCode : getDestinationHashCode,
previousPathNode : null,
originParentPathNode : null,
distance : 0,
distanceTracker : distanceTracker)
{
}