public function apply($transformer, $related_articles, $node)
{
$related_item = RelatedItem::create();
$related_articles->addRelated($related_item);
$url = $this->getProperty(self::PROPERTY_URL, $node);
if ($url) {
$related_item->withURL($url);
} else {
$transformer->addWarning(new InvalidSelector(self::PROPERTY_URL, $related_articles, $node, $this));
}
if ($this->getProperty(self::PROPERTY_SPONSORED, $node)) {
$related_item->enableSponsored();
}
return $related_articles;
}
/**
* Adds a new related article item
*
* @param RelatedItem $item The related article item
*
* @return $this
*/
public function addRelated($item)
{
Type::enforce($item, RelatedItem::getClassName());
$this->items[] = $item;
return $this;
}
