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

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<?php
namespace Activitypub\Rest;
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use WP_Error;
use stdClass;
use WP_REST_Server;
use WP_REST_Response;
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use Activitypub\Collection\Users as User_Collection;
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use Activitypub\Collection\Followers as FollowerCollection;
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use function Activitypub\get_rest_url_by_path;
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/**
* ActivityPub Followers REST-Class
*
* @author Matthias Pfefferle
*
* @see https://www.w3.org/TR/activitypub/#followers
*/
class Followers {
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/**
* Initialize the class, registering WordPress hooks
*/
public static function init() {
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\add_action( 'rest_api_init', array( self::class, 'register_routes' ) );
}
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/**
* Register routes
*/
public static function register_routes() {
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\register_rest_route(
ACTIVITYPUB_REST_NAMESPACE,
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'/users/(?P<user_id>[\w\-\.]+)/followers',
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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, 'get' ),
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'args' => self::request_parameters(),
'permission_callback' => '__return_true',
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),
)
);
}
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/**
* Handle GET request
*
* @param WP_REST_Request $request
*
* @return WP_REST_Response
*/
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public static function get( $request ) {
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$user_id = $request->get_param( 'user_id' );
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$user = User_Collection::get_by_various( $user_id );
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if ( is_wp_error( $user ) ) {
return $user;
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}
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$page = $request->get_param( 'page', 1 );
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/*
* Action triggerd prior to the ActivityPub profile being created and sent to the client
*/
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\do_action( 'activitypub_outbox_pre' );
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$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 ) );
$json->generator = 'http://wordpress.org/?v=' . \get_bloginfo_rss( 'version' );
$json->actor = $user->get_id();
$json->type = 'OrderedCollectionPage';
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$json->totalItems = FollowerCollection::count_followers( $user->get__id() ); // phpcs:ignore
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$json->partOf = get_rest_url_by_path( sprintf( 'users/%d/followers', $user->get__id() ) ); // phpcs:ignore
$json->first = \add_query_arg( 'page', 1, $json->partOf ); // phpcs:ignore
$json->last = \add_query_arg( 'page', \ceil ( $json->totalItems / 20 ), $json->partOf ); // phpcs:ignore
if ( $page && ( ( \ceil ( $json->totalItems / 20 ) ) >= $page ) ) { // phpcs:ignore
$json->next = \add_query_arg( 'page', $page + 1, $json->partOf ); // phpcs:ignore
}
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// phpcs:ignore
$json->orderedItems = array_map(
function( $item ) {
return $item->get_url();
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},
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FollowerCollection::get_followers( $user->get__id(), 20, $page )
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);
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$response = new WP_REST_Response( $json, 200 );
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$response->header( 'Content-Type', 'application/activity+json' );
return $response;
}
/**
* The supported parameters
*
* @return array list of parameters
*/
public static function request_parameters() {
$params = array();
$params['page'] = array(
'type' => 'integer',
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'default' => 1,
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);
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$params['user_id'] = array(
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'required' => true,
'type' => 'string',
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);
return $params;
}
}