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<?php
/**
* Yoast SEO: News plugin file.
*
* @package WPSEO_News\XML_Sitemaps
*/
/**
* Handling the generation of the News Sitemap.
*/
class WPSEO_News_Sitemap {
/**
* Options.
*
* @var array
*/
private $options;
/**
* The sitemap basename.
*
* @var string
*/
private $basename;
/**
* Constructor. Set options, basename and add actions.
*/
public function __construct() {
$this->options = WPSEO_News::get_options();
add_action( 'init', array( $this, 'init' ), 10 );
add_action( 'save_post', array( $this, 'invalidate_sitemap' ) );
add_action( 'wpseo_news_schedule_sitemap_clear', 'yoast_wpseo_news_clear_sitemap_cache' );
}
/**
* Add the XML News Sitemap to the Sitemap Index.
*
* @param string $str String with Index sitemap content.
*
* @return string
*/
public function add_to_index( $str ) {
// Only add when we have items.
$items = $this->get_items( 1 );
if ( empty( $items ) ) {
return $str;
}
$date = new DateTime( get_lastpostdate( 'gmt' ), new DateTimeZone( 'UTC' ) );
$str .= '<sitemap>' . "\n";
$str .= '<loc>' . self::get_sitemap_name() . '</loc>' . "\n";
$str .= '<lastmod>' . htmlspecialchars( $date->format( 'c' ) ) . '</lastmod>' . "\n";
$str .= '</sitemap>' . "\n";
return $str;
}
/**
* Register the XML News sitemap with the main sitemap class.
*/
public function init() {
$this->basename = self::get_sitemap_name( false );
// Setting stylesheet for cached sitemap.
add_action( 'wpseo_sitemap_stylesheet_cache_' . $this->basename, array( $this, 'set_stylesheet_cache' ) );
if ( isset( $GLOBALS['wpseo_sitemaps'] ) ) {
add_filter( 'wpseo_sitemap_index', array( $this, 'add_to_index' ) );
$this->yoast_wpseo_news_schedule_clear();
// We might consider deprecating/removing this, because we are using a static xsl file.
$GLOBALS['wpseo_sitemaps']->register_sitemap( $this->basename, array( $this, 'build' ) );
if ( method_exists( $GLOBALS['wpseo_sitemaps'], 'register_xsl' ) ) {
$xsl_rewrite_rule = sprintf( '^%s-sitemap.xsl$', $this->basename );
$GLOBALS['wpseo_sitemaps']->register_xsl( $this->basename, array( $this, 'build_news_sitemap_xsl' ), $xsl_rewrite_rule );
}
}
}
/**
* Method to invalidate the sitemap.
*
* @param integer $post_id Post ID to invalidate for.
*/
public function invalidate_sitemap( $post_id ) {
// If this is just a revision, don't invalidate the sitemap cache yet.
if ( wp_is_post_revision( $post_id ) ) {
return;
}
// Only invalidate when we are in a News Post Type object.
if ( ! in_array( get_post_type( $post_id ), WPSEO_News::get_included_post_types(), true ) ) {
return;
}
WPSEO_Sitemaps_Cache::invalidate( $this->basename );
}
/**
* When sitemap is coming out of the cache there is no stylesheet. Normally it will take the default stylesheet.
*
* This method is called by a filter that will set the video stylesheet.
*
* @param object $target_object Target Object to set cache from.
*
* @return object
*/
public function set_stylesheet_cache( $target_object ) {
$target_object->renderer->set_stylesheet( $this->get_stylesheet_line() );
return $target_object;
}
/**
* Build the sitemap and push it to the XML Sitemaps Class instance for display.
*/
public function build() {
$GLOBALS['wpseo_sitemaps']->set_sitemap( $this->build_sitemap() );
$GLOBALS['wpseo_sitemaps']->renderer->set_stylesheet( $this->get_stylesheet_line() );
}
/**
* Building the XML for the sitemap.
*
* @return string
*/
public function build_sitemap() {
$output = '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:news="http://www.google.com/schemas/sitemap-news/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">' . "\n";
$items = $this->get_items();
// Loop through items.
if ( ! empty( $items ) ) {
$output .= $this->build_items( $items );
}
$output .= '</urlset>';
return $output;
}
/**
* Outputs the XSL file.
*/
public function build_news_sitemap_xsl() {
$protocol = 'HTTP/1.1';
if ( filter_input( INPUT_SERVER, 'SERVER_PROTOCOL' ) !== '' ) {
$protocol = sanitize_text_field( filter_input( INPUT_SERVER, 'SERVER_PROTOCOL' ) );
}
// Force a 200 header and replace other status codes.
header( $protocol . ' 200 OK', true, 200 );
// Set the right content / mime type.
header( 'Content-Type: text/xml' );
// Prevent the search engines from indexing the XML Sitemap.
header( 'X-Robots-Tag: noindex, follow', true );
// Make the browser cache this file properly.
header( 'Pragma: public' );
header( 'Cache-Control: maxage=' . YEAR_IN_SECONDS );
header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', ( time() + YEAR_IN_SECONDS ) ) . ' GMT' );
readfile( dirname( WPSEO_NEWS_FILE ) . '/assets/xml-news-sitemap.xsl' );
die();
}
/**
* Clear the sitemap and sitemap index every hour to make sure the sitemap is hidden or shown when it needs to be.
*
* @return void
*/
private function yoast_wpseo_news_schedule_clear() {
$schedule = wp_get_schedule( 'wpseo_news_schedule_sitemap_clear' );
if ( empty( $schedule ) ) {
wp_schedule_event( time(), 'hourly', 'wpseo_news_schedule_sitemap_clear' );
}
}
/**
* Getter for stylesheet url.
*
* @return string
*/
private function get_stylesheet_line() {
$stylesheet_url = "\n" . '<?xml-stylesheet type="text/xsl" href="' . esc_url( $this->get_xsl_url() ) . '"?>';
return $stylesheet_url;
}
/**
* Getting all the items for the sitemap.
*
* @param int $limit The limit for the query, default is 1000 items.
*
* @return array|null|object
*/
private function get_items( $limit = 1000 ) {
global $wpdb;
// Get supported post types.
$post_types = WPSEO_News::get_included_post_types();
if ( empty( $post_types ) ) {
return array();
}
$replacements = $post_types;
$replacements[] = max( 1, min( 1000, $limit ) );
// Get posts for the last two days only, credit to Alex Moss for this code.
$items = $wpdb->get_results(
$wpdb->prepare(
"SELECT ID, post_content, post_name, post_author, post_parent, post_date_gmt, post_date, post_date_gmt, post_title, post_type
FROM {$wpdb->posts}
WHERE post_status='publish'
AND ( TIMESTAMPDIFF( MINUTE, post_date_gmt, UTC_TIMESTAMP() ) <= ( 48 * 60 ) )
AND post_type IN (" . implode( ',', array_fill( 0, count( $post_types ), '%s' ) ) . ')
ORDER BY post_date_gmt DESC
LIMIT 0, %d
',
$replacements
)
);
return $items;
}
/**
* Loop through all $items and build each one of it.
*
* @param array $items Items to convert to sitemap output.
*
* @return string $output
*/
private function build_items( $items ) {
$output = '';
foreach ( $items as $item ) {
$output .= new WPSEO_News_Sitemap_Item( $item, $this->options );
}
return $output;
}
/**
* Getting the name for the sitemap, if $full_path is true, it will return the full path.
*
* @param bool $full_path Generate a full path.
*
* @return string mixed
*/
public static function get_sitemap_name( $full_path = true ) {
// This filter is documented in classes/sitemap.php.
$sitemap_name = apply_filters( 'wpseo_news_sitemap_name', self::news_sitemap_basename() );
// When $full_path is true, it will generate a full path.
if ( $full_path ) {
return WPSEO_Sitemaps_Router::get_base_url( $sitemap_name . '-sitemap.xml' );
}
return $sitemap_name;
}
/**
* Returns the basename of the news-sitemap, the first portion of the name of the sitemap "file".
*
* Defaults to news, but it's possible to override it by using the YOAST_NEWS_SITEMAP_BASENAME constant.
*
* @since 3.1
*
* @return string $basename
*/
public static function news_sitemap_basename() {
$basename = 'news';
if ( post_type_exists( 'news' ) ) {
$basename = 'yoast-news';
}
if ( defined( 'YOAST_NEWS_SITEMAP_BASENAME' ) ) {
$basename = YOAST_NEWS_SITEMAP_BASENAME;
}
return $basename;
}
/**
* Retrieves the XSL URL that should be used in the current environment.
*
* When home_url and site_url are not the same, the home_url should be used.
* This is because the XSL needs to be served from the same domain, protocol and port
* as the XML file that is loading it.
*
* @return string The XSL URL that needs to be used.
*/
protected function get_xsl_url() {
if ( home_url() !== site_url() ) {
return home_url( $this->basename . '-sitemap.xsl' );
}
return plugin_dir_url( WPSEO_NEWS_FILE ) . 'assets/xml-news-sitemap.xsl';
}
}