Wallmander\ElasticsearchIndexer\Model\Indexer::prepareTerms PHP Method

    protected static function prepareTerms($post)
    {
        $taxonomies = get_object_taxonomies($post->post_type, 'objects');
        $terms = [];
        foreach ($taxonomies as $taxonomy) {
            $objectTerms = get_the_terms($post->ID, $taxonomy->name);
            if (is_wp_error($objectTerms)) {
                continue;
            }
            if (!$objectTerms) {
                $terms[$taxonomy->name] = [];
                continue;
            }
            foreach ($objectTerms as $term) {
                $allSlugs = [$term->slug];
                //Add parent slug
                if ($parent = get_term_by('id', $term->parent, $term->taxonomy)) {
                    $allSlugs[] = $parent->slug;
                }
                $terms[$term->taxonomy][] = ['term_id' => $term->term_id, 'slug' => $term->slug, 'name' => $term->name, 'parent' => $term->parent, 'all_slugs' => $allSlugs];
            }
        }
        return $terms;
    }