125 lines
3.2 KiB
PHP
125 lines
3.2 KiB
PHP
<?php
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namespace Activitypub\Rest;
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use WP_Error;
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use WP_REST_Response;
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/**
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* ActivityPub WebFinger REST-Class
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*
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* @author Matthias Pfefferle
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*
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* @see https://webfinger.net/
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*/
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class Webfinger {
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/**
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* Initialize the class, registering WordPress hooks
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*/
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public static function init() {
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\add_action( 'rest_api_init', array( self::class, 'register_routes' ) );
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\add_action( 'webfinger_user_data', array( self::class, 'add_webfinger_discovery' ), 10, 3 );
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}
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/**
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* Register routes
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*/
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public static function register_routes() {
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\register_rest_route(
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ACTIVITYPUB_REST_NAMESPACE,
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'/webfinger',
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array(
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array(
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'methods' => \WP_REST_Server::READABLE,
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'callback' => array( self::class, 'webfinger' ),
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'args' => self::request_parameters(),
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'permission_callback' => '__return_true',
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),
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)
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);
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}
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/**
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* Render JRD file
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*
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* @param WP_REST_Request $request
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* @return WP_REST_Response
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*/
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public static function webfinger( $request ) {
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$resource = $request->get_param( 'resource' );
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if ( \strpos( $resource, '@' ) === false ) {
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return new WP_Error( 'activitypub_unsupported_resource', \__( 'Resource is invalid', 'activitypub' ), array( 'status' => 400 ) );
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}
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$resource = \str_replace( 'acct:', '', $resource );
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$resource_identifier = \substr( $resource, 0, \strrpos( $resource, '@' ) );
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$resource_host = \str_replace( 'www.', '', \substr( \strrchr( $resource, '@' ), 1 ) );
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$blog_host = \str_replace( 'www.', '', \wp_parse_url( \home_url( '/' ), \PHP_URL_HOST ) );
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if ( $blog_host !== $resource_host ) {
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return new WP_Error( 'activitypub_wrong_host', \__( 'Resource host does not match blog host', 'activitypub' ), array( 'status' => 404 ) );
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}
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$user = \get_user_by( 'login', \esc_sql( $resource_identifier ) );
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if ( ! $user || ! \user_can( $user, 'publish_posts' ) ) {
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return new WP_Error( 'activitypub_user_not_found', \__( 'User not found', 'activitypub' ), array( 'status' => 404 ) );
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}
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$json = array(
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'subject' => $resource,
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'aliases' => array(
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\get_author_posts_url( $user->ID ),
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),
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'links' => array(
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array(
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'rel' => 'self',
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'type' => 'application/activity+json',
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'href' => \get_author_posts_url( $user->ID ),
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),
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array(
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'rel' => 'http://webfinger.net/rel/profile-page',
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'type' => 'text/html',
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'href' => \get_author_posts_url( $user->ID ),
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),
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),
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);
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return new WP_REST_Response( $json, 200 );
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}
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/**
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* The supported parameters
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*
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* @return array list of parameters
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*/
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public static function request_parameters() {
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$params = array();
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$params['resource'] = array(
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'required' => true,
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'type' => 'string',
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'pattern' => '^acct:(.+)@(.+)$',
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);
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return $params;
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}
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/**
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* Add WebFinger discovery links
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*
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* @param array $array the jrd array
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* @param string $resource the WebFinger resource
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* @param WP_User $user the WordPress user
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*/
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public static function add_webfinger_discovery( $array, $resource, $user ) {
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$array['links'][] = array(
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'rel' => 'self',
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'type' => 'application/activity+json',
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'href' => \get_author_posts_url( $user->ID ),
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);
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return $array;
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}
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}
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