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

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<?php
namespace Activitypub\Collection;
use WP_Error;
use WP_Term_Query;
use Activitypub\Webfinger;
use Activitypub\Model\Activity;
use function Activitypub\safe_remote_get;
use function Activitypub\safe_remote_post;
use function Activitypub\get_remote_metadata_by_actor;
/**
* ActivityPub Followers Collection
*
* @author Matthias Pfefferle
*/
class Followers {
const TAXONOMY = 'activitypub-followers';
/**
* Register WordPress hooks/actions and register Taxonomy
*
* @return void
*/
public static function init() {
// register "followers" taxonomy
self::register_taxonomy();
\add_action( 'activitypub_inbox_follow', array( self::class, 'handle_follow_request' ), 10, 2 );
\add_action( 'activitypub_inbox_undo', array( self::class, 'handle_undo_request' ), 10, 2 );
}
/**
* Register the "Followers" Taxonomy
*
* @return void
*/
public static function register_taxonomy() {
$args = array(
'labels' => array(
'name' => _x( 'Followers', 'taxonomy general name', 'activitypub' ),
'singular_name' => _x( 'Followers', 'taxonomy singular name', 'activitypub' ),
'menu_name' => __( 'Followers', 'activitypub' ),
),
'hierarchical' => false,
'show_ui' => false,
'show_in_menu' => false,
'show_in_nav_menus' => false,
'show_admin_column' => false,
'query_var' => false,
'rewrite' => false,
'public' => false,
'capabilities' => array(
'edit_terms' => null,
),
);
register_taxonomy( self::TAXONOMY, 'user', $args );
register_taxonomy_for_object_type( self::TAXONOMY, 'user' );
register_term_meta(
self::TAXONOMY,
'user_id',
array(
'type' => 'string',
'single' => true,
//'sanitize_callback' => array( self::class, 'validate_username' ),
)
);
register_term_meta(
self::TAXONOMY,
'name',
array(
'type' => 'string',
'single' => true,
//'sanitize_callback' => array( self::class, 'validate_displayname' ),
)
);
register_term_meta(
self::TAXONOMY,
'username',
array(
'type' => 'string',
'single' => true,
//'sanitize_callback' => array( self::class, 'validate_username' ),
)
);
register_term_meta(
self::TAXONOMY,
'avatar',
array(
'type' => 'string',
'single' => true,
//'sanitize_callback' => array( self::class, 'validate_avatar' ),
)
);
register_term_meta(
self::TAXONOMY,
'created_at',
array(
'type' => 'string',
'single' => true,
//'sanitize_callback' => array( self::class, 'validate_created_at' ),
)
);
register_term_meta(
self::TAXONOMY,
'inbox',
array(
'type' => 'string',
'single' => true,
//'sanitize_callback' => array( self::class, 'validate_created_at' ),
)
);
do_action( 'activitypub_after_register_taxonomy' );
}
/**
* Handle the "Follow" Request
*
* @param array $object The JSON "Follow" Activity
* @param int $user_id The ID of the WordPress User
*
* @return void
*/
public static function handle_follow_request( $object, $user_id ) {
// save follower
self::add_follower( $user_id, $object['actor'] );
}
/**
* Handles "Unfollow" requests
*
* @param array $object The JSON "Undo" Activity
* @param int $user_id The ID of the WordPress User
*/
public static function handle_undo_request( $object, $user_id ) {
if (
isset( $object['object'] ) &&
isset( $object['object']['type'] ) &&
'Follow' === $object['object']['type']
) {
self::remove_follower( $user_id, $object['actor'] );
}
}
/**
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* Add a new Follower
*
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* @param int $user_id The WordPress user
* @param string $actor The Actor URL
* @return void
*/
public static function add_follower( $user_id, $actor ) {
$remote_data = get_remote_metadata_by_actor( $actor );
if ( ! $remote_data || is_wp_error( $remote_data ) || ! is_array( $remote_data ) ) {
$remote_data = array();
}
$term = term_exists( $actor, self::TAXONOMY );
if ( ! $term ) {
$term = wp_insert_term(
$actor,
self::TAXONOMY,
array(
'slug' => sanitize_title( $actor ),
'description' => wp_json_encode( $remote_data ),
)
);
}
$term_id = $term['term_id'];
$map_meta = array(
'name' => 'name',
'preferredUsername' => 'username',
'inbox' => 'inbox',
);
foreach ( $map_meta as $remote => $internal ) {
if ( ! empty( $remote_data[ $remote ] ) ) {
update_term_meta( $term_id, $internal, esc_html( $remote_data[ $remote ] ), true );
}
}
if ( ! empty( $remote_data['icon']['url'] ) ) {
update_term_meta( $term_id, 'avatar', esc_url_raw( $remote_data['icon']['url'] ), true );
}
wp_set_object_terms( $user_id, $actor, self::TAXONOMY, true );
}
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/**
* Undocumented function
*
* @return void
*/
public static function send_ack() {
// get inbox
$inbox = \Activitypub\get_inbox_by_actor( $object['actor'] );
// send "Accept" activity
$activity = new Activity( 'Accept' );
$activity->set_object( $object );
$activity->set_actor( \get_author_posts_url( $user_id ) );
$activity->set_to( $object['actor'] );
$activity->set_id( \get_author_posts_url( $user_id ) . '#follow-' . \preg_replace( '~^https?://~', '', $object['actor'] ) );
$activity = $activity->to_simple_json();
$response = safe_remote_post( $inbox, $activity, $user_id );
}
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/**
* Get the Followers of a given user
*
* @param int $user_id
* @param int $number
* @param int $offset
* @return array The Term list of followers
*/
public static function get_followers( $user_id, $number = null, $offset = null ) {
//self::migrate_followers( $user_id );
$terms = new WP_Term_Query(
array(
'taxonomy' => self::TAXONOMY,
'hide_empty' => false,
'object_ids' => $user_id,
'number' => $number,
'offset' => $offset,
)
);
return $terms->get_terms();
}
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/**
* Count the total number of followers
*
* @param int $user_id The WordPress user
* @return int The number of Followers
*/
public static function count_followers( $user_id ) {
return count( self::get_followers( $user_id ) );
}
public static function migrate_followers( $user_id ) {
$followes = get_user_meta( $user_id, 'activitypub_followers', true );
if ( $followes ) {
foreach ( $followes as $follower ) {
self::add_follower( $user_id, $follower );
}
}
}
}