569 lines
15 KiB
PHP
569 lines
15 KiB
PHP
<?php
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namespace Activitypub\Rest;
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/**
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* ActivityPub Inbox REST-Class
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*
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* @author Matthias Pfefferle
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*
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* @see https://www.w3.org/TR/activitypub/#inbox
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*/
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class Inbox {
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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\Inbox', 'register_routes' ) );
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\add_filter( 'rest_pre_serve_request', array( '\Activitypub\Rest\Inbox', 'serve_request' ), 11, 4 );
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\add_action( 'activitypub_inbox_follow', array( '\Activitypub\Rest\Inbox', 'handle_follow' ), 10, 2 );
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\add_action( 'activitypub_inbox_undo', array( '\Activitypub\Rest\Inbox', 'handle_unfollow' ), 10, 2 );
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//\add_action( 'activitypub_inbox_like', array( '\Activitypub\Rest\Inbox', 'handle_reaction' ), 10, 2 );
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//\add_action( 'activitypub_inbox_announce', array( '\Activitypub\Rest\Inbox', 'handle_reaction' ), 10, 2 );
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\add_action( 'activitypub_inbox_create', array( '\Activitypub\Rest\Inbox', 'handle_create' ), 10, 2 );
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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',
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'/inbox',
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array(
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array(
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'methods' => \WP_REST_Server::EDITABLE,
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'callback' => array( '\Activitypub\Rest\Inbox', 'shared_inbox_post' ),
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'args' => self::shared_inbox_post_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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\register_rest_route(
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'activitypub/1.0',
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'/users/(?P<user_id>\d+)/inbox',
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array(
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array(
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'methods' => \WP_REST_Server::EDITABLE,
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'callback' => array( '\Activitypub\Rest\Inbox', 'user_inbox_post' ),
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'args' => self::user_inbox_post_parameters(),
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'permission_callback' => '__return_true',
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),
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array(
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'methods' => \WP_REST_Server::READABLE,
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'callback' => array( '\Activitypub\Rest\Inbox', 'user_inbox_get' ),
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'args' => self::user_inbox_get_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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* Hooks into the REST API request to verify the signature.
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*
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* @param bool $served Whether the request has already been served.
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* @param WP_HTTP_ResponseInterface $result Result to send to the client. Usually a WP_REST_Response.
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* @param WP_REST_Request $request Request used to generate the response.
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* @param WP_REST_Server $server Server instance.
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*
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* @return true
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*/
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public static function serve_request( $served, $result, $request, $server ) {
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if ( '/activitypub' !== \substr( $request->get_route(), 0, 12 ) ) {
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return $served;
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}
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return $served;
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}
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/**
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* Renders the user-inbox
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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 user_inbox_get( $request ) {
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$user_id = $request->get_param( 'user_id' );
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$page = $request->get_param( 'page', 0 );
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/*
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* Action triggerd prior to the ActivityPub profile being created and sent to the client
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*/
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\do_action( 'activitypub_inbox_pre' );
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$json = new \stdClass();
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$json->{'@context'} = \Activitypub\get_context();
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$json->id = \home_url( \add_query_arg( null, null ) );
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$json->generator = 'http://wordpress.org/?v=' . \get_bloginfo_rss( 'version' );
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$json->type = 'OrderedCollectionPage';
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$json->partOf = \get_rest_url( null, "/activitypub/1.0/users/$user_id/inbox" ); // phpcs:ignore
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$json->totalItems = 0; // phpcs:ignore
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$json->orderedItems = array(); // phpcs:ignore
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$json->first = $json->partOf; // phpcs:ignore
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// filter output
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$json = \apply_filters( 'activitypub_inbox_array', $json );
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/*
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* Action triggerd after the ActivityPub profile has been created and sent to the client
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*/
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\do_action( 'activitypub_inbox_post' );
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$response = new \WP_REST_Response( $json, 200 );
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$response->header( 'Content-Type', 'application/activity+json' );
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return $response;
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}
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/**
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* Handles user-inbox requests
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*
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* @param WP_REST_Request $request
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*
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* @return WP_REST_Response
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*/
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public static function user_inbox_post( $request ) {
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$user_id = $request->get_param( 'user_id' );
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$data = $request->get_params();
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$type = $request->get_param( 'type' );
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$type = \strtolower( $type );
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\do_action( 'activitypub_inbox', $data, $user_id, $type );
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\do_action( "activitypub_inbox_{$type}", $data, $user_id );
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return new \WP_REST_Response( array(), 202 );
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}
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/**
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* The shared inbox
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*
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* @param WP_REST_Request $request
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*
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* @return WP_REST_Response
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*/
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public static function shared_inbox_post( $request ) {
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$data = $request->get_params();
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$type = $request->get_param( 'type' );
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$users = self::extract_recipients( $data );
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if ( ! $users ) {
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return new \WP_Error(
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'rest_invalid_param',
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\__( 'No recipients found', 'activitypub' ),
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array(
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'status' => 404,
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'params' => array(
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'to' => \__( 'Please check/validate "to" field', 'activitypub' ),
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'bto' => \__( 'Please check/validate "bto" field', 'activitypub' ),
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'cc' => \__( 'Please check/validate "cc" field', 'activitypub' ),
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'bcc' => \__( 'Please check/validate "bcc" field', 'activitypub' ),
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'audience' => \__( 'Please check/validate "audience" field', 'activitypub' ),
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),
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)
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);
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}
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foreach ( $users as $user ) {
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$type = \strtolower( $type );
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\do_action( 'activitypub_inbox', $data, $user->ID, $type );
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\do_action( "activitypub_inbox_{$type}", $data, $user->ID );
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}
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return new \WP_REST_Response( array(), 202 );
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}
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/**
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* The supported parameters
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*
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* @return array list of parameters
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*/
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public static function user_inbox_get_parameters() {
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$params = array();
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$params['page'] = array(
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'type' => 'integer',
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);
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$params['user_id'] = array(
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'required' => true,
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'type' => 'integer',
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'validate_callback' => function( $param, $request, $key ) {
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return user_can( $param, 'publish_posts' );
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},
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);
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return $params;
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}
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/**
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* The supported parameters
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*
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* @return array list of parameters
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*/
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public static function user_inbox_post_parameters() {
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$params = array();
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$params['page'] = array(
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'type' => 'integer',
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);
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$params['user_id'] = array(
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'required' => true,
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'type' => 'integer',
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'validate_callback' => function( $param, $request, $key ) {
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return user_can( $param, 'publish_posts' );
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},
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);
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$params['id'] = array(
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'required' => true,
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'sanitize_callback' => 'esc_url_raw',
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);
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$params['signature'] = array(
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'required' => true,
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'validate_callback' => function( $param, $request, $key ) {
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if ( ! \Activitypub\Signature::verify_http_signature( $request ) ) {
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return false; // returns http 400 rest_invalid_param
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}
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return $param;
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},
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);
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$params['actor'] = array(
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'required' => true,
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'sanitize_callback' => function( $param, $request, $key ) {
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if ( ! \is_string( $param ) ) {
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$param = $param['id'];
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}
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return \esc_url_raw( $param );
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},
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);
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$params['type'] = array(
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'required' => true,
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//'type' => 'enum',
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//'enum' => array( 'Create' ),
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//'sanitize_callback' => function( $param, $request, $key ) {
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// return \strtolower( $param );
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//},
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);
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$params['object'] = array(
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'required' => true,
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);
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return $params;
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}
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/**
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* The supported parameters
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*
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* @return array list of parameters
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*/
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public static function shared_inbox_post_parameters() {
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$params = array();
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$params['page'] = array(
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'type' => 'integer',
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);
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$params['id'] = array(
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'required' => true,
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'type' => 'string',
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'sanitize_callback' => 'esc_url_raw',
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'validate_callback' => function( $param, $request, $key ) {
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if ( ! \Activitypub\Signature::verify_http_signature( $request ) ) {
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return false;
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}
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return $param;
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},
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);
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$params['actor'] = array(
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'required' => true,
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//'type' => array( 'object', 'string' ),
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'sanitize_callback' => function( $param, $request, $key ) {
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if ( ! \is_string( $param ) ) {
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$param = $param['id'];
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}
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return \esc_url_raw( $param );
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},
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);
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$params['type'] = array(
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'required' => true,
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//'type' => 'enum',
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//'enum' => array( 'Create' ),
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//'sanitize_callback' => function( $param, $request, $key ) {
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// return \strtolower( $param );
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//},
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);
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$params['object'] = array(
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'required' => true,
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//'type' => 'object',
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);
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$params['to'] = array(
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'required' => false,
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'sanitize_callback' => function( $param, $request, $key ) {
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if ( \is_string( $param ) ) {
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$param = array( $param );
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}
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return $param;
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},
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);
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$params['cc'] = array(
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'sanitize_callback' => function( $param, $request, $key ) {
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if ( \is_string( $param ) ) {
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$param = array( $param );
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}
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return $param;
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},
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);
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$params['bcc'] = array(
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'sanitize_callback' => function( $param, $request, $key ) {
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if ( \is_string( $param ) ) {
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$param = array( $param );
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}
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return $param;
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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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* Handles "Follow" requests
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*
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* @param array $object The activity-object
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* @param int $user_id The id of the local blog-user
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*/
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public static function handle_follow( $object, $user_id ) {
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// save follower
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\Activitypub\Peer\Followers::add_follower( $object['actor'], $user_id );
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// get inbox
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$inbox = \Activitypub\get_inbox_by_actor( $object['actor'] );
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// send "Accept" activity
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$activity = new \Activitypub\Model\Activity( 'Accept', \Activitypub\Model\Activity::TYPE_SIMPLE );
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$activity->set_object( $object );
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$activity->set_actor( \get_author_posts_url( $user_id ) );
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$activity->set_to( $object['actor'] );
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$activity->set_id( \get_author_posts_url( $user_id ) . '#follow-' . \preg_replace( '~^https?://~', '', $object['actor'] ) );
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$activity = $activity->to_simple_json();
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$response = \Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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/**
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* Handles "Unfollow" requests
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*
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* @param array $object The activity-object
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* @param int $user_id The id of the local blog-user
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*/
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public static function handle_unfollow( $object, $user_id ) {
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if ( isset( $object['object'] ) && isset( $object['object']['type'] ) && 'Follow' === $object['object']['type'] ) {
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\Activitypub\Peer\Followers::remove_follower( $object['actor'], $user_id );
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}
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}
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/**
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* Handles "Reaction" requests
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*
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* @param array $object The activity-object
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* @param int $user_id The id of the local blog-user
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*/
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public static function handle_reaction( $object, $user_id ) {
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$meta = \Activitypub\get_remote_metadata_by_actor( $object['actor'] );
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$comment_post_id = \url_to_postid( $object['object'] );
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// save only replys and reactions
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if ( ! $comment_post_id ) {
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return false;
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}
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$commentdata = array(
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'comment_post_ID' => $comment_post_id,
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'comment_author' => \esc_attr( $meta['name'] ),
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'comment_author_email' => '',
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'comment_author_url' => \esc_url_raw( $object['actor'] ),
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'comment_content' => \esc_url_raw( $object['actor'] ),
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'comment_type' => \esc_attr( \strtolower( $object['type'] ) ),
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'comment_parent' => 0,
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'comment_meta' => array(
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'source_url' => \esc_url_raw( $object['id'] ),
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'avatar_url' => \esc_url_raw( $meta['icon']['url'] ),
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'protocol' => 'activitypub',
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),
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);
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// disable flood control
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\remove_action( 'check_comment_flood', 'check_comment_flood_db', 10 );
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// do not require email for AP entries
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\add_filter( 'pre_option_require_name_email', '__return_false' );
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$state = \wp_new_comment( $commentdata, true );
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\remove_filter( 'pre_option_require_name_email', '__return_false' );
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// re-add flood control
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\add_action( 'check_comment_flood', 'check_comment_flood_db', 10, 4 );
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}
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/**
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* Handles "Create" requests
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*
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* @param array $object The activity-object
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* @param int $user_id The id of the local blog-user
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*/
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public static function handle_create( $object, $user_id ) {
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$meta = \Activitypub\get_remote_metadata_by_actor( $object['actor'] );
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if ( ! isset( $object['object']['inReplyTo'] ) ) {
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return;
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}
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// check if Activity is public or not
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if ( ! self::is_activity_public( $object ) ) {
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// @todo maybe send email
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return;
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}
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$comment_post_id = \url_to_postid( $object['object']['inReplyTo'] );
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// save only replys and reactions
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if ( ! $comment_post_id ) {
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return false;
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}
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$commentdata = array(
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'comment_post_ID' => $comment_post_id,
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'comment_author' => \esc_attr( $meta['name'] ),
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'comment_author_url' => \esc_url_raw( $object['actor'] ),
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'comment_content' => \wp_filter_kses( $object['object']['content'] ),
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'comment_type' => '',
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'comment_author_email' => '',
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'comment_parent' => 0,
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'comment_meta' => array(
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'source_url' => \esc_url_raw( $object['object']['url'] ),
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'avatar_url' => \esc_url_raw( $meta['icon']['url'] ),
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'protocol' => 'activitypub',
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),
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);
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// disable flood control
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\remove_action( 'check_comment_flood', 'check_comment_flood_db', 10 );
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// do not require email for AP entries
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\add_filter( 'pre_option_require_name_email', '__return_false' );
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$state = \wp_new_comment( $commentdata, true );
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\remove_filter( 'pre_option_require_name_email', '__return_false' );
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// re-add flood control
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\add_action( 'check_comment_flood', 'check_comment_flood_db', 10, 4 );
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}
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/**
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* Extract recipient URLs from Activity object
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*
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* @param array $data
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*
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* @return array The list of user URLs
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*/
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public static function extract_recipients( $data ) {
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$recipient_items = array();
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foreach ( array( 'to', 'bto', 'cc', 'bcc', 'audience' ) as $i ) {
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if ( array_key_exists( $i, $data ) ) {
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if ( is_array( $data[ $i ] ) ) {
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$recipient = $data[ $i ];
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} else {
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$recipient = array( $data[ $i ] );
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}
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$recipient_items = array_merge( $recipient_items, $recipient );
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}
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if ( array_key_exists( $i, $data['object'] ) ) {
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if ( is_array( $data['object'][ $i ] ) ) {
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$recipient = $data['object'][ $i ];
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} else {
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$recipient = array( $data['object'][ $i ] );
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}
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$recipient_items = array_merge( $recipient_items, $recipient );
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}
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}
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$recipients = array();
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// flatten array
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|
foreach ( $recipient_items as $recipient ) {
|
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if ( is_array( $recipient ) ) {
|
|
// check if recipient is an object
|
|
if ( array_key_exists( 'id', $recipient ) ) {
|
|
$recipients[] = $recipient['id'];
|
|
}
|
|
} else {
|
|
$recipients[] = $recipient;
|
|
}
|
|
}
|
|
|
|
return array_unique( $recipients );
|
|
}
|
|
|
|
/**
|
|
* Get local user recipients
|
|
*
|
|
* @param array $data
|
|
*
|
|
* @return array The list of local users
|
|
*/
|
|
public static function get_recipients( $data ) {
|
|
$recipients = self::extract_recipients( $data );
|
|
$users = array();
|
|
|
|
foreach ( $recipients as $recipient ) {
|
|
$user_id = \Activitypub\url_to_authorid( $recipient );
|
|
|
|
$user = get_user_by( 'id', $user_id );
|
|
|
|
if ( $user ) {
|
|
$users[] = $user;
|
|
}
|
|
}
|
|
|
|
return $users;
|
|
}
|
|
|
|
/**
|
|
* Check if passed Activity is Public
|
|
*
|
|
* @param array $data
|
|
* @return boolean
|
|
*/
|
|
public static function is_activity_public( $data ) {
|
|
$recipients = self::extract_recipients( $data );
|
|
|
|
return in_array( 'https://www.w3.org/ns/activitystreams#Public', $recipients, true );
|
|
}
|
|
}
|