wordpress-activitypub/includes/rest/class-outbox.php

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<?php
namespace Activitypub\Rest;
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/**
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* ActivityPub Outbox REST-Class
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*
* @author Matthias Pfefferle
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*
* @see https://www.w3.org/TR/activitypub/#outbox
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*/
class Outbox {
/**
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* Initialize the class, registering WordPress hooks
*/
public static function init() {
add_action( 'rest_api_init', array( '\Activitypub\Rest\Outbox', 'register_routes' ) );
add_action( 'activitypub_send_post_activity', array( '\Activitypub\Rest\Outbox', 'send_post_activity' ) );
add_action( 'activitypub_send_update_activity', array( '\Activitypub\Rest\Outbox', 'send_update_activity' ) );
}
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/**
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* Register routes
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*/
public static function register_routes() {
register_rest_route(
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'activitypub/1.0', '/users/(?P<id>\d+)/outbox', array(
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array(
'methods' => \WP_REST_Server::READABLE,
'callback' => array( '\Activitypub\Rest\Outbox', 'user_outbox' ),
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'args' => self::request_parameters(),
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),
)
);
}
/**
* Renders the user-outbox
*
* @param WP_REST_Request $request
* @return WP_REST_Response
*/
public static function user_outbox( $request ) {
$user_id = $request->get_param( 'id' );
$author = get_user_by( 'ID', $user_id );
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if ( ! $author ) {
return new \WP_Error( 'rest_invalid_param', __( 'User not found', 'activitypub' ), array(
'status' => 404,
'params' => array(
'user_id' => __( 'User not found', 'activitypub' ),
),
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) );
}
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$page = $request->get_param( 'page', 0 );
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/*
* Action triggerd prior to the ActivityPub profile being created and sent to the client
*/
do_action( 'activitypub_outbox_pre' );
$json = new \stdClass();
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$json->{'@context'} = \Activitypub\get_context();
$json->id = home_url( add_query_arg( null, null ) );
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$json->generator = 'http://wordpress.org/?v=' . get_bloginfo_rss( 'version' );
$json->actor = get_author_posts_url( $user_id );
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$json->type = 'OrderedCollectionPage';
$json->partOf = get_rest_url( null, "/activitypub/1.0/users/$user_id/outbox" ); // phpcs:ignore
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$count_posts = wp_count_posts();
$json->totalItems = intval( $count_posts->publish ); // phpcs:ignore
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$posts = get_posts( array(
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'posts_per_page' => 10,
'author' => $user_id,
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'offset' => $page * 10,
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) );
$json->first = add_query_arg( 'page', 0, $json->partOf ); // phpcs:ignore
$json->last = add_query_arg( 'page', ( ceil ( $json->totalItems / 10 ) ) - 1, $json->partOf ); // phpcs:ignore
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if ( ( ceil ( $json->totalItems / 10 ) ) - 1 > $page ) { // phpcs:ignore
$json->next = add_query_arg( 'page', ++$page, $json->partOf ); // phpcs:ignore
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}
foreach ( $posts as $post ) {
$activitypub_post = new \Activitypub\Post( $post );
$activitypub_activity = new \Activitypub\Activity( 'Create', \Activitypub\Activity::TYPE_NONE );
$activitypub_activity->from_post( $activitypub_post->to_array() );
$json->orderedItems[] = $activitypub_activity->to_array(); // phpcs:ignore
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}
// filter output
$json = apply_filters( 'activitypub_outbox_array', $json );
/*
* Action triggerd after the ActivityPub profile has been created and sent to the client
*/
do_action( 'activitypub_outbox_post' );
$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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/**
* The supported parameters
*
* @return array list of parameters
*/
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public static function request_parameters() {
$params = array();
$params['page'] = array(
'type' => 'integer',
);
$params['id'] = array(
'required' => true,
'type' => 'integer',
);
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return $params;
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}
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/**
* Send "create" activities
*
* @param int $post_id
*/
public static function send_post_activity( $post_id ) {
$post = get_post( $post_id );
$user_id = $post->post_author;
$activitypub_post = new \Activitypub\Post( $post );
$activitypub_activity = new \Activitypub\Activity( 'Create', \Activitypub\Activity::TYPE_FULL );
$activitypub_activity->from_post( $activitypub_post->to_array() );
$activity = $activitypub_activity->to_json(); // phpcs:ignore
$followers = \Activitypub\Db\Followers::get_followers( $user_id );
foreach ( \Activitypub\get_follower_inboxes( $user_id, $followers ) as $inbox ) {
$response = \Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
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/**
* Send "update" activities
*
* @param int $post_id
*/
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public static function send_update_activity( $post_id ) {
$post = get_post( $post_id );
$user_id = $post->post_author;
$activitypub_post = new \Activitypub\Post( $post );
$activitypub_activity = new \Activitypub\Activity( 'Update', \Activitypub\Activity::TYPE_FULL );
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$activitypub_activity->from_post( $activitypub_post->to_array() );
$activity = $activitypub_activity->to_json(); // phpcs:ignore
$followers = \Activitypub\Db\Followers::get_followers( $user_id );
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foreach ( \Activitypub\get_follower_inboxes( $user_id, $followers ) as $inbox ) {
$response = \Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
}
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}