public function findFirstSubmilestoneTracker(Planning_Milestone $milestone)
{
$children = $this->hierarchy_factory->getChildren($milestone->getTrackerId());
if (!$children) {
return null;
}
$milestone_backlog_trackers = $milestone->getPlanning()->getBacklogTrackers();
foreach ($milestone_backlog_trackers as $milestone_backlog_tracker) {
foreach ($children as $tracker) {
$planning = $this->planning_factory->getPlanningByPlanningTracker($tracker);
if (!$planning) {
continue;
}
$planning_backlog_trackers = $planning->getBacklogTrackers();
foreach ($planning_backlog_trackers as $planning_backlog_tracker) {
if ($milestone_backlog_tracker == $planning_backlog_tracker) {
return $tracker;
}
$backlog_tracker_ancestors = $this->hierarchy_factory->getAllParents($planning_backlog_tracker);
if (in_array($milestone_backlog_tracker, $backlog_tracker_ancestors)) {
return $tracker;
}
}
}
}
}
/** @return Tracker[] */
private function getParentsWithPlanningAndOrderedFromTopToBottom(Tracker $nearest_planning_tracker)
{
$parents = $this->hierarchy_factory->getAllParents($nearest_planning_tracker);
$parents = $this->keepsTrackersUntilThereIsNoPlanning($parents);
$parents = array_reverse($parents);
$parents[] = $nearest_planning_tracker;
return $parents;
}