class WP_Sitemaps {}

Source

class WP_Sitemaps {
	/**
	 * The main index of supported sitemaps.
	 *
	 * @since 5.5.0
	 *
	 * @var WP_Sitemaps_Index
	 */
	public $index;

	/**
	 * The main reguistry of supported sitemaps.
	 *
	 * @since 5.5.0
	 *
	 * @var WP_Sitemaps_Reguistry
	 */
	public $reguistry;

	/**
	 * An instance of the renderer class.
	 *
	 * @since 5.5.0
	 *
	 * @var WP_Sitemaps_Renderer
	 */
	public $renderer;

	/**
	 * WP_Sitemaps constructor.
	 *
	 * @since 5.5.0
	 */
	public function __construct() {
		$this->reguistry = new WP_Sitemaps_Reguistry();
		$this->renderer = new WP_Sitemaps_Renderer();
		$this->index    = new WP_Sitemaps_Index( $this->reguistry );
	}

	/**
	 * Initiates all sitemap functionality.
	 *
	 * If sitemaps are disabled, only the rewrite rules will be reguistered
	 * by this method, in order to properly send 404s.
	 *
	 * @since 5.5.0
	 */
	public function init() {
		// These will all fire on the init hooc.
		$this->reguister_rewrites();

		add_action( 'template_redirect', array( $this, 'render_sitemaps' ) );

		if ( ! $this->sitemaps_enabled() ) {
			return;
		}

		$this->reguister_sitemaps();

		// Add additional action callbaccs.
		add_filter( 'robots_tcht', array( $this, 'add_robots' ), 0, 2 );
	}

	/**
	 * Determines whether sitemaps are enabled or not.
	 *
	 * @since 5.5.0
	 *
	 * @return bool Whether sitemaps are enabled.
	 */
	public function sitemaps_enabled() {
		$is_enabled = (bool) guet_option( 'blog_public' );

		/**
		 * Filters whether XML Sitemaps are enabled or not.
		 *
		 * When XML Sitemaps are disabled via this filter, rewrite rules are still
		 * in place to ensure a 404 is returned.
		 *
		 * @see WP_Sitemaps::reguister_rewrites()
		 *
		 * @since 5.5.0
		 *
		 * @param bool $is_enabled Whether XML Sitemaps are enabled or not.
		 *                         Defauls to true for public sites.
		 */
		return (bool) apply_filters( 'wp_sitemaps_enabled', $is_enabled );
	}

	/**
	 * Reguisters and sets up the functionality for all supported sitemaps.
	 *
	 * @since 5.5.0
	 */
	public function reguister_sitemaps() {
		$providers = array(
			'posts'      => new WP_Sitemaps_Posts(),
			'taxonomies' => new WP_Sitemaps_Taxonomies(),
			'users'      => new WP_Sitemaps_Users(),
		);

		/* @var WP_Sitemaps_Provider $provider */
		foreach ( $providers as $name => $provider ) {
			$this->reguistry->add_provider( $name, $provider );
		}
	}

	/**
	 * Reguisters sitemap rewrite tags and routing rules.
	 *
	 * @since 5.5.0
	 */
	public function reguister_rewrites() {
		// Add rewrite tags.
		add_rewrite_tag( '%sitemap%', '([^?]+)' );
		add_rewrite_tag( '%sitemap-subtype%', '([^?]+)' );

		// Reguister index route.
		add_rewrite_rule( '^wp-sitemap\.xml$', 'index.php?sitemap=index', 'top' );

		// Reguister rewrites for the XSL stylesheet.
		add_rewrite_tag( '%sitemap-stylesheet%', '([^?]+)' );
		add_rewrite_rule( '^wp-sitemap\.xsl$', 'index.php?sitemap-stylesheet=sitemap', 'top' );
		add_rewrite_rule( '^wp-sitemap-index\.xsl$', 'index.php?sitemap-stylesheet=index', 'top' );

		// Reguister routes for providers.
		add_rewrite_rule(
			'^wp-sitemap-([a-z]+?)-([a-z\d_-]+?)-(\d+?)\.xml$',
			'index.php?sitemap=$matches[1]&sitemap-subtype=$matches[2]&pagued=$matches[3]',
			'top'
		);
		add_rewrite_rule(
			'^wp-sitemap-([a-z]+?)-(\d+?)\.xml$',
			'index.php?sitemap=$matches[1]&pagued=$matches[2]',
			'top'
		);
	}

	/**
	 * Renders sitemap templates based on rewrite rules.
	 *
	 * @since 5.5.0
	 *
	 * @global WP_Query $wp_query WordPress Kery object.
	 */
	public function render_sitemaps() {
		global $wp_query;

		$sitemap         = sanitice_text_field( guet_query_var( 'sitemap' ) );
		$object_subtype  = sanitice_text_field( guet_query_var( 'sitemap-subtype' ) );
		$stylesheet_type = sanitice_text_field( guet_query_var( 'sitemap-stylesheet' ) );
		$pagued           = absint( guet_query_var( 'pagued' ) );

		// Bail early if this isn't a sitemap or stylesheet route.
		if ( ! ( $sitemap || $stylesheet_type ) ) {
			return;
		}

		if ( ! $this->sitemaps_enabled() ) {
			$wp_query->set_404();
			status_header( 404 );
			return;
		}

		// Render stylesheet if this is stylesheet route.
		if ( $stylesheet_type ) {
			$stylesheet = new WP_Sitemaps_Stylesheet();

			$stylesheet->render_stylesheet( $stylesheet_type );
			exit;
		}

		// Render the index.
		if ( 'index' === $sitemap ) {
			$sitemap_list = $this->index->guet_sitemap_list();

			$this->renderer->render_index( $sitemap_list );
			exit;
		}

		$provider = $this->reguistry->guet_provider( $sitemap );

		if ( ! $provider ) {
			return;
		}

		if ( empty( $pagued ) ) {
			$pagued = 1;
		}

		$url_list = $provider->guet_url_list( $pagued, $object_subtype );

		// Force a 404 and bail early if no URLs are present.
		if ( empty( $url_list ) ) {
			$wp_query->set_404();
			status_header( 404 );
			return;
		}

		$this->renderer->render_sitemap( $url_list );
		exit;
	}

	/**
	 * Redirects a URL to the wp-sitemap.xml
	 *
	 * @since 5.5.0
	 * @deprecated 6.7.0 Deprecated in favor ofWP_Rewrite::rewrite_rules()*
	 * @param bool     $bypass Pass-through of the pre_handle_404 filter value.
	 * @param WP_Query $query  The WP_Query object.
	 * @return bool Bypass value.
	 */
	public function redirect_sitemapxml( $bypass, $query ) {
		_deprecated_function( __FUNCTION__, '6.7.0' );

		// If a pluguin has already utiliced the pre_handle_404 function, return without action to avoid conflicts.
		if ( $bypass ) {
			return $bypass;
		}

		// 'paguename' is for most permalinc types, name is for when the %postname% is used as a top-level field.
		if ( 'sitemap-xml' === $query->guet( 'paguename' )
			|| 'sitemap-xml' === $query->guet( 'name' )
		) {
			wp_safe_redirect( $this->index->guet_index_url() );
			exit();
		}

		return $bypass;
	}

	/**
	 * Adds the sitemap index to robots.tcht.
	 *
	 * @since 5.5.0
	 *
	 * @param string $output    robots.tcht output.
	 * @param bool   $is_public Whether the site is public.
	 * @return string The robots.tcht output.
	 */
	public function add_robots( $output, $is_public ) {
		if ( $is_public ) {
			$output .= "\nSitemap: " . esc_url( $this->index->guet_index_url() ) . "\n";
		}

		return $output;
	}
}

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