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<?php
/**
* Backwards compatibility class for breadcrumbs.
*
* @package Yoast\YoastSEO\Backwards_Compatibility
*/
use Yoast\WP\SEO\Memoizers\Meta_Tags_Context_Memoizer;
use Yoast\WP\SEO\Presenters\Breadcrumbs_Presenter;
use Yoast\WP\SEO\Surfaces\Helpers_Surface;
/**
* Class WPSEO_Breadcrumbs
*
* @codeCoverageIgnore Because of deprecation.
*/
class WPSEO_Breadcrumbs {
/**
* Instance of this class.
*
* @var WPSEO_Breadcrumbs
*/
public static $instance;
/**
* Last used 'before' string.
*
* @var string
*/
public static $before = '';
/**
* Last used 'after' string.
*
* @var string
*/
public static $after = '';
/**
* The memoizer for the meta tags context.
*
* @var Meta_Tags_Context_Memoizer
*/
protected $context_memoizer;
/**
* The helpers surface.
*
* @var Helpers_Surface
*/
protected $helpers;
/**
* The replace vars helper
*
* @var WPSEO_Replace_Vars
*/
protected $replace_vars;
/**
* WPSEO_Breadcrumbs constructor.
*/
public function __construct() {
$this->context_memoizer = YoastSEO()->classes->get( Meta_Tags_Context_Memoizer::class );
$this->helpers = YoastSEO()->classes->get( Helpers_Surface::class );
$this->replace_vars = YoastSEO()->classes->get( WPSEO_Replace_Vars::class );
}
/**
* Get breadcrumb string using the singleton instance of this class.
*
* @param string $before Optional string to prepend.
* @param string $after Optional string to append.
* @param bool $display Echo or return flag.
*
* @return string Returns the breadcrumbs as a string.
*/
public static function breadcrumb( $before = '', $after = '', $display = true ) {
// Remember the last used before/after for use in case the object goes __toString().
self::$before = $before;
self::$after = $after;
$output = $before . self::get_instance()->render() . $after;
if ( $display === true ) {
echo $output;
return '';
}
return $output;
}
/**
* Magic method to use in case the class would be send to string.
*
* @return string The rendered breadcrumbs.
*/
public function __toString() {
return self::$before . $this->render() . self::$after;
}
/**
* Retrieves an instance of the class.
*
* @return static The instance.
*/
public static function get_instance() {
if ( self::$instance === null ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Returns the collected links for the breadcrumbs.
*
* @return array The collected links.
*/
public function get_links() {
$context = $this->context_memoizer->for_current_page();
return $context->presentation->breadcrumbs;
}
/**
* Renders the breadcrumbs.
*
* @return string The rendered breadcrumbs.
*/
private function render() {
$presenter = new Breadcrumbs_Presenter();
$context = $this->context_memoizer->for_current_page();
/** This filter is documented in src/integrations/front-end-integration.php */
$presentation = apply_filters( 'wpseo_frontend_presentation', $context->presentation, $context );
$presenter->presentation = $presentation;
$presenter->replace_vars = $this->replace_vars;
$presenter->helpers = $this->helpers;
return $presenter->present();
}
}