wordpress-activitypub/includes/managers/class-transformers-manager.php

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<?php
/**
* Inspired by the way elementor handles addons.
*
* @link https://github.com/elementor/elementor/
*/
namespace ActivityPub;
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use function Activitypub\camel_to_snake_case;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
/**
* ActivityPub transformers manager.
*
* ActivityPub transformers manager handler class is responsible for registering and
* initializing all the supported WP-Pobject to ActivityPub transformers.
*
* @since version_number_transformer_management_placeholder
*/
class Transformers_Manager {
/**
* Transformers.
*
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* Holds the list of all the ActivityPub transformers. Default is `null`.
*
* @since 1.0.0
* @access private
*
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* @var \ActivityPub\Transformer_Base[]
*/
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private $transformers = array();
/**
* Transformers manager constructor.
*
* Initializing ActivityPub transformers manager.
*
* @since version_number_transformer_management_placeholder
* @access public
*/
public function __construct() {
$this->require_files();
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}
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/**
* Require files.
*
* Require ActivityPub transformer base class.
*
* @since version_number_transformer_management_placeholder
* @access private
*/
private function require_files() {
require ACTIVITYPUB_PLUGIN_DIR . 'includes/base/class-transformer-base.php';
}
/**
* Register a transformer.
*
* @since version_number_transformer_management_placeholder
* @access public
*
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* @param \ActivityPub\Transformer_Base $transformer_instance ActivityPub Transformer.
*
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* @return bool True if the ActivityPub transformer was registered.
*/
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public function register( Transformer_Base $transformer_instance) {
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if ( ! $transformer_instance instanceof Transformer_Base ) {
_doing_it_wrong(
__METHOD__,
__( 'ActivityPub transformer instance must be a implementation of the \ActivityPub\Transformer_Base class.' ),
'version_number_transformer_management_placeholder'
);
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return false;
}
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$transformer_name = $transformer_instance->name;
if ( preg_match( '/[A-Z]+/', $transformer_name ) ) {
_doing_it_wrong(
__METHOD__,
__( 'ActivityPub transformer names must not contain uppercase characters.' ),
'version_number_transformer_management_placeholder'
);
return false;
}
$name_matcher = '/^[a-z0-9-]+\/[a-z0-9-]+$/';
if ( ! preg_match( $name_matcher, $transformer_name ) ) {
_doing_it_wrong(
__METHOD__,
__( 'ActivityPub transformer names must contain a namespace prefix. Example: my-plugin/my-custom-transformer' ),
'version_number_transformer_management_placeholder'
);
return false;
}
if ( $this->is_registered( $transformer_name ) ) {
_doing_it_wrong(
__METHOD__,
/* translators: %s: Block name. */
sprintf( __( 'ActivityPub transformer with name "%s" is already registered.' ), $transformer_name ),
'version_number_transformer_management_placeholder'
);
return false;
}
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/**
* Should the ActivityPub transformer be registered.
*
* @since version_number_transformer_management_placeholder
*
* @param bool $should_register Should the ActivityPub transformer be registered. Default is `true`.
* @param \ActivityPub\Transformer_Base $transformer_instance Widget instance.
*/
$should_register = apply_filters( 'activitypub/transformers/is_transformer_enabled', true, $transformer_instance );
if ( ! $should_register ) {
return false;
}
$this->_transformers[ $transformer_name ] = $transformer_instance;
return true;
}
/**
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* Init transformers.
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*
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* Initialize ActivityPub transformer manager.
*
* Include the builtin transformers by default and add third party ones.
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*
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* @since version_number_transformer_management_placeholder
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* @access private
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*/
private function init_transformers() {
$builtin_transformers = [
'post'
];
$this->_transformers = [];
foreach ( $builtin_transformers as $transformer_name ) {
include ACTIVITYPUB_PLUGIN_DIR . 'includes/transformers/class-' . $transformer_name . '.php';
$class_name = camel_to_snake_case( $transformer_name );
$class_name = __NAMESPACE__ . '\Transformer_' . $class_name;
$this->register( new $class_name() );
}
/**
* After the transformers are registered.
*
* Fires after the built-in Actiitypub transformers are registered.
*
* @since version_number_transformer_management_placeholder
*
* @param Transformer_Manager $this The widgets manager.
*/
do_action( 'activitypub/transformers/register', $this );
}
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}