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<?php
/**
* Application Controller file.
*
* Self-contained controller for the ActivityPub Application actor.
* The Application is not a real actor in the plugin's internal sense —
* it cannot be followed, addressed, or interacted with. It exists only as:
* 1. A JSON-LD document at /wp-json/activitypub/1.0/application
* 2. A signing identity for outbound HTTP GET requests
*
* @package Activitypub
*/
namespace Activitypub\Rest;
use Activitypub\Activity\Actor;
use Activitypub\Activity\Generic_Object;
use Activitypub\Application;
use function Activitypub\get_rest_url_by_path;
use function Activitypub\home_host;
/**
* ActivityPub Application Controller.
*/
class Application_Controller extends \WP_REST_Controller {
/**
* The namespace of this controller's route.
*
* @var string
*/
protected $namespace = ACTIVITYPUB_REST_NAMESPACE;
/**
* The base of this controller's route.
*
* @var string
*/
protected $rest_base = 'application';
/**
* Register routes.
*/
public function register_routes() {
\register_rest_route(
$this->namespace,
'/' . $this->rest_base,
array(
array(
'methods' => \WP_REST_Server::READABLE,
'callback' => array( $this, 'get_item' ),
'permission_callback' => '__return_true',
),
'schema' => array( $this, 'get_item_schema' ),
)
);
\register_rest_route(
$this->namespace,
'/' . $this->rest_base . '/outbox',
array(
array(
'methods' => \WP_REST_Server::READABLE,
'callback' => array( $this, 'get_outbox' ),
'permission_callback' => '__return_true',
),
)
);
}
/**
* Retrieves the application actor profile.
*
* @since 9.1.0
*
* @param \WP_REST_Request $request The request object.
* @return \WP_REST_Response Response object.
*/
public function get_item( $request ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
$id = Application::get_id();
$json = array(
'@context' => Actor::JSON_LD_CONTEXT,
'id' => $id,
'type' => 'Application',
'name' => Application::USERNAME,
'preferredUsername' => Application::USERNAME,
'summary' => sprintf(
/* translators: %s: Domain of the site */
\__( 'This is the Application Actor for %s.', 'activitypub' ),
home_host()
),
'url' => Application::get_url(),
'icon' => Application::get_icon(),
'published' => Application::get_published(),
'inbox' => get_rest_url_by_path( 'inbox' ),
'outbox' => get_rest_url_by_path( 'application/outbox' ),
'manuallyApprovesFollowers' => true,
'discoverable' => false,
'indexable' => false,
'invisible' => true,
'webfinger' => Application::get_webfinger(),
'publicKey' => array(
'id' => Application::get_key_id(),
'owner' => $id,
'publicKeyPem' => Application::get_public_key(),
),
'implements' => array(
array(
'href' => 'https://datatracker.ietf.org/doc/html/rfc9421',
'name' => 'RFC-9421: HTTP Message Signatures',
),
),
);
/*
* Run the same serialization filters the object-based path used, so
* integrations that add actor fields via these hooks still apply to the
* Application actor. The filters document a Generic_Object argument, so
* hydrate one from the array to keep that contract.
*/
$class = 'application';
$object = Generic_Object::init_from_array( $json );
/** This filter is documented in includes/activity/class-generic-object.php */
$json = \apply_filters( 'activitypub_activity_object_array', $json, $class, $id, $object );
/** This filter is documented in includes/activity/class-generic-object.php */
$json = \apply_filters( "activitypub_activity_{$class}_object_array", $json, $id, $object );
$rest_response = new \WP_REST_Response( $json, 200 );
$rest_response->header( 'Content-Type', 'application/activity+json; charset=' . \get_option( 'blog_charset' ) );
return $rest_response;
}
/**
* Returns an empty outbox collection for the Application actor.
*
* The Application is a signing-only identity and does not publish
* activities, so its outbox is always an empty OrderedCollection.
*
* @since 9.1.0
*
* @param \WP_REST_Request $request The request object.
* @return \WP_REST_Response Response object.
*/
public function get_outbox( $request ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
$json = array(
'@context' => Actor::JSON_LD_CONTEXT,
'id' => get_rest_url_by_path( 'application/outbox' ),
'type' => 'OrderedCollection',
'totalItems' => 0,
'orderedItems' => array(),
);
$rest_response = new \WP_REST_Response( $json, 200 );
$rest_response->header( 'Content-Type', 'application/activity+json; charset=' . \get_option( 'blog_charset' ) );
return $rest_response;
}
/**
* Retrieves the schema for the application endpoint.
*
* @return array Schema data.
*/
public function get_item_schema() {
if ( $this->schema ) {
return $this->add_additional_fields_schema( $this->schema );
}
$this->schema = array(
'$schema' => 'http://json-schema.org/draft-04/schema#',
'title' => 'application',
'type' => 'object',
'properties' => array(
'@context' => array(
'type' => 'array',
'items' => array(
'type' => array( 'string', 'object' ),
),
),
'id' => array(
'type' => 'string',
'format' => 'uri',
),
'type' => array(
'type' => 'string',
'enum' => array( 'Application' ),
),
'name' => array(
'type' => 'string',
),
'icon' => array(
'type' => 'object',
'properties' => array(
'type' => array(
'type' => 'string',
),
'url' => array(
'type' => 'string',
'format' => 'uri',
),
),
),
'published' => array(
'type' => 'string',
'format' => 'date-time',
),
'summary' => array(
'type' => 'string',
),
'url' => array(
'type' => 'string',
'format' => 'uri',
),
'inbox' => array(
'type' => 'string',
'format' => 'uri',
),
'outbox' => array(
'type' => 'string',
'format' => 'uri',
),
'streams' => array(
'type' => 'array',
'items' => array(
'type' => 'string',
),
),
'preferredUsername' => array(
'type' => 'string',
),
'publicKey' => array(
'type' => 'object',
'properties' => array(
'id' => array(
'type' => 'string',
'format' => 'uri',
),
'owner' => array(
'type' => 'string',
'format' => 'uri',
),
'publicKeyPem' => array(
'type' => 'string',
),
),
),
'manuallyApprovesFollowers' => array(
'type' => 'boolean',
),
'discoverable' => array(
'type' => 'boolean',
),
'indexable' => array(
'type' => 'boolean',
),
'invisible' => array(
'type' => 'boolean',
),
'implements' => array(
'type' => 'array',
'items' => array(
'type' => 'object',
'properties' => array(
'href' => array(
'type' => 'string',
'format' => 'uri',
),
'name' => array(
'type' => 'string',
),
),
),
),
'webfinger' => array(
'type' => 'string',
),
),
);
return $this->add_additional_fields_schema( $this->schema );
}
}