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<?php
namespace Yoast\WP\SEO\Helpers\Schema;
use Closure;
use WPSEO_Replace_Vars;
use Yoast\WP\SEO\Conditionals\No_Conditionals;
use Yoast\WP\SEO\Config\Schema_IDs;
use Yoast\WP\SEO\Context\Meta_Tags_Context;
use Yoast\WP\SEO\Helpers\Date_Helper;
use Yoast\WP\SEO\Presentations\Indexable_Presentation;
/**
* Registers the Schema replace variables and exposes a method to replace variables on a Schema graph.
*/
class Replace_Vars_Helper {
use No_Conditionals;
/**
* The replace vars.
*
* @var WPSEO_Replace_Vars
*/
protected $replace_vars;
/**
* The Schema ID helper.
*
* @var ID_Helper
*/
protected $id_helper;
/**
* The date helper.
*
* @var Date_Helper
*/
protected $date_helper;
/**
* Replace_Vars_Helper constructor.
*
* @param WPSEO_Replace_Vars $replace_vars The replace vars.
* @param ID_Helper $id_helper The Schema ID helper.
* @param Date_Helper $date_helper The date helper.
*/
public function __construct(
WPSEO_Replace_Vars $replace_vars,
ID_Helper $id_helper,
Date_Helper $date_helper
) {
$this->replace_vars = $replace_vars;
$this->id_helper = $id_helper;
$this->date_helper = $date_helper;
}
/**
* Replaces the variables.
*
* @param array $schema_data The Schema data.
* @param Indexable_Presentation $presentation The indexable presentation.
*
* @return array The array with replaced vars.
*/
public function replace( array $schema_data, Indexable_Presentation $presentation ) {
foreach ( $schema_data as $key => $value ) {
if ( \is_array( $value ) ) {
$schema_data[ $key ] = $this->replace( $value, $presentation );
continue;
}
$schema_data[ $key ] = $this->replace_vars->replace( $value, $presentation->source );
}
return $schema_data;
}
/**
* Registers the Schema-related replace vars.
*
* @param Meta_Tags_Context $context The meta tags context.
*
* @return void
*/
public function register_replace_vars( $context ) {
$replace_vars = [
'main_schema_id' => $context->main_schema_id,
'author_id' => $this->id_helper->get_user_schema_id( $context->indexable->author_id, $context ),
'person_id' => $context->site_url . Schema_IDs::PERSON_HASH,
'primary_image_id' => $context->canonical . Schema_IDs::PRIMARY_IMAGE_HASH,
'webpage_id' => $context->main_schema_id,
'website_id' => $context->site_url . Schema_IDs::WEBSITE_HASH,
'organization_id' => $context->site_url . Schema_IDs::ORGANIZATION_HASH,
];
if ( $context->post ) {
// Post does not always exist, e.g. on term pages.
$replace_vars['post_date'] = $this->date_helper->format( $context->post->post_date, \DATE_ATOM );
}
foreach ( $replace_vars as $var => $value ) {
$this->register_replacement( $var, $value );
}
}
/**
* Registers a replace var and its value.
*
* @param string $variable The replace variable.
* @param string $value The value that the variable should be replaced with.
*
* @return void
*/
protected function register_replacement( $variable, $value ) {
$this->replace_vars->safe_register_replacement(
$variable,
$this->get_identity_function( $value )
);
}
/**
* Returns an anonymous function that in turn just returns the given value.
*
* @param mixed $value The value that the function should return.
*
* @return Closure A function that returns the given value.
*/
protected function get_identity_function( $value ) {
return static function () use ( $value ) {
return $value;
};
}
}