/**
* Checks whether the given source is fresh, meaning it doesn't need revisiting right now.
*
* @param SourceInterface $source
*
* @return bool
*/
protected function isFresh(SourceInterface $source)
{
$lastVisitDate = $source->getDatetimeLastVisited();
// no previous visit date, consider it stale
if (null === $lastVisitDate) {
return false;
}
$revisitDate = clone $lastVisitDate;
$revisitDate->modify(sprintf('+%d hours', $source->getScraper()->getRevisitFrequency()));
return $revisitDate > new \DateTime();
}
