The validated entry.
	 */
	private function validateSubentries( $entry ) {
		if ( ! isset( $entry['languages'] ) ) {
			return $entry;
		}

		foreach ( $entry['languages'] as $index => $subentry ) {
			if ( empty( $subentry['language'] ) || empty( $subentry['location'] ) ) {
				unset( $entry['languages'][ $index ] );
			}
		}

		return $entry;
	}

	/**
	 * Checks whether the given post should be excluded.
	 *
	 * @since 4.2.4
	 *
	 * @param  int  $postId The post ID.
	 * @return bool         Whether the post should be excluded.
	 */
	private function isExcludedPost( $postId ) {
		static $excludedPostIds = null;
		if ( null === $excludedPostIds ) {
			$excludedPostIds = explode( ', ', aioseo()->sitemap->helpers->excludedPosts() );
			$excludedPostIds = array_map( function ( $postId ) {
				return (int) $postId;
			}, $excludedPostIds );
		}

		if ( in_array( $postId, $excludedPostIds, true ) ) {
			return true;
		}

		// Let's also check if the post is published and not password-protected.
		$post = get_post( $postId );
		if ( ! is_a( $post, 'WP_Post' ) ) {
			return true;
		}

		if ( ! empty( $post->post_password ) || 'publish' !== $post->post_status ) {
			return true;
		}

		// Now, we must also check for noindex.
		$metaData = aioseo()->meta->metaData->getMetaData( $post );
		if ( ! empty( $metaData->robots_noindex ) ) {
			return true;
		}

		return false;
	}

	/**
	 * Checks whether the given term should be excluded.
	 *
	 * @since 4.2.4
	 *
	 * @param  int  $termId The term ID.
	 * @return bool         Whether the term should be excluded.
	 */
	private function isExcludedTerm( $termId ) {
		static $excludedTermIds = null;
		if ( null === $excludedTermIds ) {
			$excludedTermIds = explode( ', ', aioseo()->sitemap->helpers->excludedTerms() );
			$excludedTermIds = array_map( function ( $termId ) {
				return (int) $termId;
			}, $excludedTermIds );
		}

		if ( in_array( $termId, $excludedTermIds, true ) ) {
			return true;
		}

		// Now, we must also check for noindex.
		$term = get_term( $termId );
		if ( ! is_a( $term, 'WP_Term' ) ) {
			return true;
		}

		// At least one post must be assigned to the term.
		$posts = aioseo()->core->db->start( 'term_relationships' )
			->select( 'object_id' )
			->where( 'term_taxonomy_id =', $term->term_taxonomy_id )
			->limit( 1 )
			->run()
			->result();

		if ( empty( $posts ) ) {
			return true;
		}

		$metaData = aioseo()->meta->metaData->getMetaData( $term );
		if ( ! empty( $metaData->robots_noindex ) ) {
			return true;
		}

		return false;
	}
}