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<?php |
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namespace Activitypub\Rest; |
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|
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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( '\Activitypub\Rest\Webfinger', 'register_routes' ) ); |
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add_action( 'webfinger_user_data', array( '\Activitypub\Rest\Webfinger', 'add_webfinger_discovery' ), 10, 3 ); |
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} |
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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/1.0', '/webfinger', array( |
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array( |
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'methods' => \WP_REST_Server::READABLE, |
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'callback' => array( '\Activitypub\Rest\Webfinger', 'webfinger' ), |
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'args' => self::request_parameters(), |
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), |
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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 = $request->get_param( 'resource' ); |
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|
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$matches = array(); |
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$matched = preg_match( '/^acct:([^@]+)@(.+)$/', $resource, $matches ); |
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|
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if ( ! $matched ) { |
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return new \WP_Error( 'activitypub_unsupported_resource', __( 'Resource is invalid', 'activitypub' ), array( 'status' => 400 ) ); |
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} |
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|
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$resource_identifier = $matches[1]; |
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$resource_host = $matches[2]; |
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|
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if ( wp_parse_url( home_url( '/' ), PHP_URL_HOST ) !== $resource_host ) { |
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return new \WP_Error( 'activitypub_wrong_host', __( 'Resource host does not match blog host', 'activitypub' ), array( 'status' => 404 ) ); |
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} |
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|
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$user = get_user_by( 'login', esc_sql( $resource_identifier ) ); |
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|
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if ( ! $user ) { |
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return new \WP_Error( 'activitypub_user_not_found', __( 'User not found', 'activitypub' ), array( 'status' => 404 ) ); |
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} |
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|
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$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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|
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return new \WP_REST_Response( $json, 200 ); |
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} |
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|
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/** |
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* The supported parameters |
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* |
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* @return array list of parameters |
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*/ |
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public static function request_parameters() { |
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$params = array(); |
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|
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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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|
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return $params; |
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} |
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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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|
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return $array; |
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} |
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} |
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|
