= $timestamps->published_at;
		$indexable->object_last_modified = $timestamps->last_modified;

		$indexable->version = $this->version;

		return $indexable;
	}

	/**
	 * Converts the meta noindex value to the indexable value.
	 *
	 * @param string $meta_value Term meta to base the value on.
	 *
	 * @return bool|null
	 */
	protected function get_noindex_value( $meta_value ) {
		if ( $meta_value === 'noindex' ) {
			return true;
		}

		if ( $meta_value === 'index' ) {
			return false;
		}

		return null;
	}

	/**
	 * Determines the focus keyword score.
	 *
	 * @param string $keyword The focus keyword that is set.
	 * @param int    $score   The score saved on the meta data.
	 *
	 * @return int|null Score to use.
	 */
	protected function get_keyword_score( $keyword, $score ) {
		if ( empty( $keyword ) ) {
			return null;
		}

		return $score;
	}

	/**
	 * Retrieves the lookup table.
	 *
	 * @return array Lookup table for the indexable fields.
	 */
	protected function get_indexable_lookup() {
		return [
			'wpseo_canonical'                => 'canonical',
			'wpseo_focuskw'                  => 'primary_focus_keyword',
			'wpseo_title'                    => 'title',
			'wpseo_desc'                     => 'description',
			'wpseo_content_score'            => 'readability_score',
			'wpseo_inclusive_language_score' => 'inclusive_language_score',
			'wpseo_bctitle'                  => 'breadcrumb_title',
			'wpseo_opengraph-title'          => 'open_graph_title',
			'wpseo_opengraph-description'    => 'open_graph_description',
			'wpseo_opengraph-image'          => 'open_graph_image',
			'wpseo_opengraph-image-id'       => 'open_graph_image_id',
			'wpseo_twitter-title'            => 'twitter_title',
			'wpseo_twitter-description'      => 'twitter_description',
			'wpseo_twitter-image'            => 'twitter_image',
			'wpseo_twitter-image-id'         => 'twitter_image_id',
		];
	}

	/**
	 * Retrieves a meta value from the given meta data.
	 *
	 * @param string $meta_key  The key to extract.
	 * @param array  $term_meta The meta data.
	 *
	 * @return string|null The meta value.
	 */
	protected function get_meta_value( $meta_key, $term_meta ) {
		if ( ! $term_meta || ! \array_key_exists( $meta_key, $term_meta ) ) {
			return null;
		}

		$value = $term_meta[ $meta_key ];
		if ( \is_string( $value ) && $value === '' ) {
			return null;
		}

		return $value;
	}

	/**
	 * Finds an alternative image for the social image.
	 *
	 * @param Indexable $indexable The indexable.
	 *
	 * @return array|bool False when not found, array with data when found.
	 */
	protected function find_alternative_image( Indexable $indexable ) {
		$content_image = $this->image->get_term_content_image( $indexable->object_id );
		if ( $content_image ) {
			return [
				'image'  => $content_image,
				'source' => 'first-content-image',
			];
		}

		return false;
	}

	/**
	 * Returns the timestamps for a given term.
	 *
	 * @param int    $term_id  The term ID.
	 * @param string $taxonomy The taxonomy.
	 *
	 * @return object An object with last_modified and published_at timestamps.
	 */
	protected function get_object_timestamps( $term_id, $taxonomy ) {
		global $wpdb;
		$post_statuses = $this->post_helper->get_public_post_statuses();

		$replacements   = [];
		$replacements[] = 'post_modified_gmt';
		$replacements[] = 'post_date_gmt';
		$replacements[] = $wpdb->posts;
		$replacements[] = $wpdb->term_relationships;
		$replacements[] = 'object_id';
		$replacements[] = 'ID';
		$replacements[] = $wpdb->term_taxonomy;
		$replacements[] = 'term_taxonomy_id';
		$replacements[] = 'term_taxonomy_id';
		$replacements[] = 'taxonomy';
		$replacements[] = $taxonomy;
		$replacements[] = 'term_id';
		$replacements[] = $term_id;
		$replacements[] = 'post_status';
		$replacements   = \array_merge( $replacements, $post_statuses );
		$replacements[] = 'post_password';

		//phpcs:disable WordPress.DB.PreparedSQLPlaceholders -- %i placeholder is still not recognized.
		//phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery -- Reason: Most performant way.
		//phpcs:disable WordPress.DB.DirectDatabaseQuery.NoCaching -- Reason: No relevant caches.
		return $wpdb->get_row(
			$wpdb->prepare(
				'
			SELECT MAX(p.%i) AS last_modified, MIN(p.%i) AS published_at
			FROM %i AS p
			INNER JOIN %i AS term_rel
				ON		term_rel.%i = p.%i
			INNER JOIN %i AS term_tax
				ON		term_tax.%i = term_rel.%i
				AND		term_tax.%i = %s
				AND		term_tax.%i = %d
			WHERE	p.%i IN (' . \implode( ', ', \array_fill( 0, \count( $post_statuses ), '%s' ) ) . ")
				AND		p.%i = ''
			",
				$replacements
			)
		);
		//phpcs:enable
	}
}