public function apply()

in src/Facebook/InstantArticles/Transformer/Rules/AnalyticsRule.php [47:76]


    public function apply($transformer, $instant_article, $node)
    {
        $analytics = Analytics::create();

        // Builds the analytics
        $url = $this->getProperty(self::PROPERTY_TRACKER_URL, $node);
        if ($url) {
            $analytics->withSource($url);
        }

        $embed_code = $this->getProperty(self::PROPERTY_TRACKER_EMBED_URL, $node);
        if ($embed_code) {
            $analytics->withHTML(Transformer::cloneNode($embed_code));
        }

        if ($url || $embed_code) {
            $instant_article->addChild($analytics);
        } else {
            $transformer->addWarning(
                new InvalidSelector(
                    'embed code or url',
                    $instant_article,
                    $node,
                    $this
                )
            );
        }

        return $instant_article;
    }