/**
* {@inheritdoc}
*/
public function filter(ParameterBag $item)
{
/** @var FeedItemBag $item */
// if source does not exist yet, by all means process it
if (null === ($source = $this->sourceManager->findSource($item->getFeed(), $item->getOriginalId()))) {
return;
}
// first try modification date
if (null !== ($mutationDate = $item->getDatetimeModified())) {
if ($source->getDatetimeModified() > $mutationDate) {
throw new FilterException('Item is not modified');
}
}
// item is modified or we don't have enough information to determine that, either way continue.
}
