set_404(); return; } // stop if it's not an ActivityPub comment if ( is_activitypub_request() && $comment->user_id ) { return; } wp_safe_redirect( get_comment_link( $comment ) ); } /** * Add the 'activitypub' query variable so WordPress won't mangle it. */ public static function add_query_vars( $vars ) { $vars[] = 'activitypub'; $vars[] = 'c'; $vars[] = 'p'; return $vars; } /** * Replaces the default avatar. * * @param array $args Arguments passed to get_avatar_data(), after processing. * @param int|string|object $id_or_email A user ID, email address, or comment object. * * @return array $args */ public static function pre_get_avatar_data( $args, $id_or_email ) { if ( ! $id_or_email instanceof \WP_Comment || ! isset( $id_or_email->comment_type ) || $id_or_email->user_id ) { return $args; } $allowed_comment_types = \apply_filters( 'get_avatar_comment_types', array( 'comment' ) ); if ( ! empty( $id_or_email->comment_type ) && ! \in_array( $id_or_email->comment_type, (array) $allowed_comment_types, true ) ) { $args['url'] = false; /** This filter is documented in wp-includes/link-template.php */ return \apply_filters( 'get_avatar_data', $args, $id_or_email ); } // Check if comment has an avatar. $avatar = self::get_avatar_url( $id_or_email->comment_ID ); if ( $avatar ) { if ( ! isset( $args['class'] ) || ! \is_array( $args['class'] ) ) { $args['class'] = array( 'u-photo' ); } else { $args['class'][] = 'u-photo'; $args['class'] = \array_unique( $args['class'] ); } $args['url'] = $avatar; $args['class'][] = 'avatar-activitypub'; } return $args; } /** * Function to retrieve Avatar URL if stored in meta. * * @param int|WP_Comment $comment * * @return string $url */ public static function get_avatar_url( $comment ) { if ( \is_numeric( $comment ) ) { $comment = \get_comment( $comment ); } return \get_comment_meta( $comment->comment_ID, 'avatar_url', true ); } /** * Link remote comments to source url. * * @param string $comment_link * @param object|WP_Comment $comment * * @return string $url */ public static function remote_comment_link( $comment_link, $comment ) { if ( ! $comment || is_admin() ) { return $comment_link; } $comment_meta = \get_comment_meta( $comment->comment_ID ); if ( ! empty( $comment_meta['source_url'][0] ) ) { return $comment_meta['source_url'][0]; } elseif ( ! empty( $comment_meta['source_id'][0] ) ) { return $comment_meta['source_id'][0]; } return $comment_link; } /** * Store permalink in meta, to send delete Activity. * * @param string $post_id The Post ID. * * @return void */ public static function trash_post( $post_id ) { \add_post_meta( $post_id, 'activitypub_canonical_url', \get_permalink( $post_id ), true ); } /** * Delete permalink from meta * * @param string $post_id The Post ID * * @return void */ public static function untrash_post( $post_id ) { \delete_post_meta( $post_id, 'activitypub_canonical_url' ); } /** * Add rewrite rules */ public static function add_rewrite_rules() { // If another system needs to take precedence over the ActivityPub rewrite rules, // they can define their own and will manually call the appropriate functions as required. if ( ACTIVITYPUB_DISABLE_REWRITES ) { return; } if ( ! \class_exists( 'Webfinger' ) ) { \add_rewrite_rule( '^.well-known/webfinger', 'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/webfinger', 'top' ); } if ( ! \class_exists( 'Nodeinfo_Endpoint' ) && true === (bool) \get_option( 'blog_public', 1 ) ) { \add_rewrite_rule( '^.well-known/nodeinfo', 'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/nodeinfo/discovery', 'top' ); \add_rewrite_rule( '^.well-known/x-nodeinfo2', 'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/nodeinfo2', 'top' ); } \add_rewrite_rule( '^@([\w\-\.]+)', 'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/users/$matches[1]', 'top' ); \add_rewrite_endpoint( 'activitypub', EP_AUTHORS | EP_PERMALINK | EP_PAGES ); } /** * Flush rewrite rules; */ public static function flush_rewrite_rules() { self::add_rewrite_rules(); \flush_rewrite_rules(); } /** * Theme compatibility stuff * * @return void */ public static function theme_compat() { $site_icon = get_theme_support( 'custom-logo' ); if ( ! $site_icon ) { // custom logo support add_theme_support( 'custom-logo', array( 'height' => 80, 'width' => 80, ) ); } $custom_header = get_theme_support( 'custom-header' ); if ( ! $custom_header ) { // This theme supports a custom header $custom_header_args = array( 'width' => 1250, 'height' => 600, 'header-text' => true, ); add_theme_support( 'custom-header', $custom_header_args ); } } /** * Display plugin upgrade notice to users * * @param array $data The plugin data * * @return void */ public static function plugin_update_message( $data ) { if ( ! isset( $data['upgrade_notice'] ) ) { return; } printf( '
%s
', wp_kses( wpautop( $data['upgrade_notice '] ), array( 'p' => array(), 'a' => array( 'href', 'title' ), 'strong' => array(), 'em' => array(), ) ) ); } /** * Register the "Followers" Taxonomy * * @return void */ private static function register_post_types() { register_post_type( Followers::POST_TYPE, array( 'labels' => array( 'name' => _x( 'Followers', 'post_type plural name', 'activitypub' ), 'singular_name' => _x( 'Follower', 'post_type single name', 'activitypub' ), ), 'public' => false, 'hierarchical' => false, 'rewrite' => false, 'query_var' => false, 'delete_with_user' => false, 'can_export' => true, 'supports' => array(), ) ); register_post_meta( Followers::POST_TYPE, 'activitypub_inbox', array( 'type' => 'string', 'single' => true, 'sanitize_callback' => 'sanitize_url', ) ); register_post_meta( Followers::POST_TYPE, 'activitypub_errors', array( 'type' => 'string', 'single' => false, 'sanitize_callback' => function ( $value ) { if ( ! is_string( $value ) ) { throw new Exception( 'Error message is no valid string' ); } return esc_sql( $value ); }, ) ); register_post_meta( Followers::POST_TYPE, 'activitypub_user_id', array( 'type' => 'string', 'single' => false, 'sanitize_callback' => function ( $value ) { return esc_sql( $value ); }, ) ); register_post_meta( Followers::POST_TYPE, 'activitypub_actor_json', array( 'type' => 'string', 'single' => true, 'sanitize_callback' => function ( $value ) { return sanitize_text_field( $value ); }, ) ); do_action( 'activitypub_after_register_post_type' ); } /** * Filters the CSS classes to add an ActivityPub class. * * @param string[] $classes An array of comment classes. * @param string[] $css_class An array of additional classes added to the list. * @param string $comment_id The comment ID as a numeric string. * * @return string[] An array of classes. */ public static function comment_class( $classes, $css_class, $comment_id ) { // check if ActivityPub comment if ( 'activitypub' === get_comment_meta( $comment_id, 'protocol', true ) ) { $classes[] = 'activitypub-comment'; } return $classes; } }