433 lines
11 KiB
PHP
433 lines
11 KiB
PHP
<?php
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namespace Activitypub;
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use Exception;
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use Activitypub\Signature;
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use Activitypub\Collection\Users;
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use Activitypub\Collection\Followers;
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use function Activitypub\sanitize_url;
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/**
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* ActivityPub Class
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*
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* @author Matthias Pfefferle
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*/
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class Activitypub {
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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_filter( 'template_include', array( self::class, 'render_json_template' ), 99 );
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\add_filter( 'query_vars', array( self::class, 'add_query_vars' ) );
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\add_filter( 'pre_get_avatar_data', array( self::class, 'pre_get_avatar_data' ), 11, 2 );
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\add_filter( 'get_comment_link', array( self::class, 'remote_comment_link' ), 11, 3 );
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// Add support for ActivityPub to custom post types
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$transformer_mapping = \get_option( 'activitypub_transformer_mapping', array( 'post' => 'activitypub/default', 'page' => 'activitypub/default' ) ) ? \get_option( 'activitypub_transformer_mapping', array( 'post' => 'activitypub/default', 'page' => 'activitypub/default' ) ) : array();
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foreach ( array_keys( $transformer_mapping ) as $post_type ) {
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\add_post_type_support( $post_type, 'activitypub' );
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}
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\add_action( 'wp_trash_post', array( self::class, 'trash_post' ), 1 );
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\add_action( 'untrash_post', array( self::class, 'untrash_post' ), 1 );
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\add_action( 'init', array( self::class, 'add_rewrite_rules' ), 11 );
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\add_action( 'after_setup_theme', array( self::class, 'theme_compat' ), 99 );
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\add_action( 'in_plugin_update_message-' . ACTIVITYPUB_PLUGIN_BASENAME, array( self::class, 'plugin_update_message' ) );
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\add_filter( 'comment_class', array( self::class, 'comment_class' ), 10, 3 );
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// register several post_types
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self::register_post_types();
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}
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/**
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* Activation Hook
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*
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* @return void
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*/
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public static function activate() {
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self::flush_rewrite_rules();
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Scheduler::register_schedules();
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}
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/**
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* Deactivation Hook
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*
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* @return void
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*/
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public static function deactivate() {
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self::flush_rewrite_rules();
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Scheduler::deregister_schedules();
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}
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/**
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* Uninstall Hook
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*
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* @return void
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*/
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public static function uninstall() {
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Scheduler::deregister_schedules();
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}
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/**
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* Return a AS2 JSON version of an author, post or page.
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*
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* @param string $template The path to the template object.
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*
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* @return string The new path to the JSON template.
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*/
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public static function render_json_template( $template ) {
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if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
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return $template;
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}
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if ( ! is_activitypub_request() ) {
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return $template;
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}
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$json_template = false;
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// check if user can publish posts
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if ( \is_author() && is_wp_error( Users::get_by_id( \get_the_author_meta( 'ID' ) ) ) ) {
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return $template;
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}
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if ( \is_author() ) {
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$json_template = ACTIVITYPUB_PLUGIN_DIR . '/templates/author-json.php';
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} elseif ( \is_singular() ) {
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$json_template = ACTIVITYPUB_PLUGIN_DIR . '/templates/post-json.php';
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} elseif ( \is_home() ) {
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$json_template = ACTIVITYPUB_PLUGIN_DIR . '/templates/blog-json.php';
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}
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if ( ACTIVITYPUB_AUTHORIZED_FETCH ) {
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$verification = Signature::verify_http_signature( $_SERVER );
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if ( \is_wp_error( $verification ) ) {
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// fallback as template_loader can't return http headers
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return $template;
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}
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}
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return $json_template;
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}
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/**
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* Add the 'activitypub' query variable so WordPress won't mangle it.
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*/
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public static function add_query_vars( $vars ) {
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$vars[] = 'activitypub';
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return $vars;
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}
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/**
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* Replaces the default avatar.
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*
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* @param array $args Arguments passed to get_avatar_data(), after processing.
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* @param int|string|object $id_or_email A user ID, email address, or comment object.
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*
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* @return array $args
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*/
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public static function pre_get_avatar_data( $args, $id_or_email ) {
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if (
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! $id_or_email instanceof \WP_Comment ||
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! isset( $id_or_email->comment_type ) ||
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$id_or_email->user_id
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) {
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return $args;
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}
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$allowed_comment_types = \apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
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if (
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! empty( $id_or_email->comment_type ) &&
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! \in_array(
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$id_or_email->comment_type,
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(array) $allowed_comment_types,
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true
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)
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) {
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$args['url'] = false;
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/** This filter is documented in wp-includes/link-template.php */
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return \apply_filters( 'get_avatar_data', $args, $id_or_email );
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}
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// Check if comment has an avatar.
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$avatar = self::get_avatar_url( $id_or_email->comment_ID );
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if ( $avatar ) {
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if ( ! isset( $args['class'] ) || ! \is_array( $args['class'] ) ) {
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$args['class'] = array( 'u-photo' );
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} else {
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$args['class'][] = 'u-photo';
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$args['class'] = \array_unique( $args['class'] );
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}
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$args['url'] = $avatar;
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$args['class'][] = 'avatar-activitypub';
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}
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return $args;
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}
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/**
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* Function to retrieve Avatar URL if stored in meta.
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*
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* @param int|WP_Comment $comment
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*
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* @return string $url
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*/
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public static function get_avatar_url( $comment ) {
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if ( \is_numeric( $comment ) ) {
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$comment = \get_comment( $comment );
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}
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return \get_comment_meta( $comment->comment_ID, 'avatar_url', true );
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}
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/**
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* Link remote comments to source url.
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*
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* @param string $comment_link
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* @param object|WP_Comment $comment
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*
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* @return string $url
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*/
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public static function remote_comment_link( $comment_link, $comment ) {
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$remote_comment_link = get_comment_meta( $comment->comment_ID, 'source_url', true );
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if ( $remote_comment_link ) {
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$comment_link = esc_url( $remote_comment_link );
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}
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return $comment_link;
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}
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/**
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* Store permalink in meta, to send delete Activity.
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*
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* @param string $post_id The Post ID.
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*
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* @return void
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*/
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public static function trash_post( $post_id ) {
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\add_post_meta(
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$post_id,
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'activitypub_canonical_url',
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\get_permalink( $post_id ),
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true
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);
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}
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/**
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* Delete permalink from meta
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*
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* @param string $post_id The Post ID
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*
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* @return void
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*/
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public static function untrash_post( $post_id ) {
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\delete_post_meta( $post_id, 'activitypub_canonical_url' );
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}
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/**
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* Add rewrite rules
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*/
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public static function add_rewrite_rules() {
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// If another system needs to take precedence over the ActivityPub rewrite rules,
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// they can define their own and will manually call the appropriate functions as required.
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if ( ACTIVITYPUB_DISABLE_REWRITES ) {
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return;
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}
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if ( ! \class_exists( 'Webfinger' ) ) {
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\add_rewrite_rule(
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'^.well-known/webfinger',
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'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/webfinger',
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'top'
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);
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}
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if ( ! \class_exists( 'Nodeinfo_Endpoint' ) && true === (bool) \get_option( 'blog_public', 1 ) ) {
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\add_rewrite_rule(
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'^.well-known/nodeinfo',
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'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/nodeinfo/discovery',
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'top'
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);
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\add_rewrite_rule(
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'^.well-known/x-nodeinfo2',
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'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/nodeinfo2',
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'top'
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);
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}
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\add_rewrite_rule(
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'^@([\w\-\.]+)',
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'index.php?rest_route=/' . ACTIVITYPUB_REST_NAMESPACE . '/users/$matches[1]',
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'top'
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);
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\add_rewrite_endpoint( 'activitypub', EP_AUTHORS | EP_PERMALINK | EP_PAGES );
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}
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/**
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* Flush rewrite rules;
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*/
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public static function flush_rewrite_rules() {
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self::add_rewrite_rules();
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\flush_rewrite_rules();
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}
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/**
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* Theme compatibility stuff
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*
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* @return void
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*/
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public static function theme_compat() {
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$site_icon = get_theme_support( 'custom-logo' );
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if ( ! $site_icon ) {
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// custom logo support
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add_theme_support(
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'custom-logo',
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array(
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'height' => 80,
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'width' => 80,
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)
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);
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}
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$custom_header = get_theme_support( 'custom-header' );
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if ( ! $custom_header ) {
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// This theme supports a custom header
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$custom_header_args = array(
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'width' => 1250,
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'height' => 600,
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'header-text' => true,
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);
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add_theme_support( 'custom-header', $custom_header_args );
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}
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}
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/**
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* Display plugin upgrade notice to users
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*
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* @param array $data The plugin data
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*
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* @return void
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*/
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public static function plugin_update_message( $data ) {
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if ( ! isset( $data['upgrade_notice'] ) ) {
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return;
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}
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printf(
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'<div class="update-message">%s</div>',
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wp_kses(
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wpautop( $data['upgrade_notice '] ),
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array(
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'p' => array(),
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'a' => array( 'href', 'title' ),
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'strong' => array(),
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'em' => array(),
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)
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)
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);
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}
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/**
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* Register the "Followers" Taxonomy
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*
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* @return void
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*/
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private static function register_post_types() {
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register_post_type(
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Followers::POST_TYPE,
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array(
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'labels' => array(
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'name' => _x( 'Followers', 'post_type plural name', 'activitypub' ),
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'singular_name' => _x( 'Follower', 'post_type single name', 'activitypub' ),
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),
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'public' => false,
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'hierarchical' => false,
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'rewrite' => false,
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'query_var' => false,
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'delete_with_user' => false,
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'can_export' => true,
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'supports' => array(),
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)
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);
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register_post_meta(
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Followers::POST_TYPE,
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'activitypub_inbox',
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array(
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'type' => 'string',
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'single' => true,
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'sanitize_callback' => 'sanitize_url',
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)
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);
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register_post_meta(
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Followers::POST_TYPE,
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'activitypub_errors',
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array(
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'type' => 'string',
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'single' => false,
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'sanitize_callback' => function ( $value ) {
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if ( ! is_string( $value ) ) {
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throw new Exception( 'Error message is no valid string' );
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}
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return esc_sql( $value );
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},
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)
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);
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register_post_meta(
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Followers::POST_TYPE,
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'activitypub_user_id',
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array(
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'type' => 'string',
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'single' => false,
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'sanitize_callback' => function ( $value ) {
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return esc_sql( $value );
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},
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)
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);
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register_post_meta(
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Followers::POST_TYPE,
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'activitypub_actor_json',
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array(
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'type' => 'string',
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'single' => true,
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'sanitize_callback' => function ( $value ) {
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return sanitize_text_field( $value );
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},
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)
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);
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do_action( 'activitypub_after_register_post_type' );
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}
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/**
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* Filters the CSS classes to add an ActivityPub class.
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*
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* @param string[] $classes An array of comment classes.
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* @param string[] $css_class An array of additional classes added to the list.
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* @param string $comment_id The comment ID as a numeric string.
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*
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* @return string[] An array of classes.
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*/
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public static function comment_class( $classes, $css_class, $comment_id ) {
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// check if ActivityPub comment
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if ( 'activitypub' === get_comment_meta( $comment_id, 'protocol', true ) ) {
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$classes[] = 'activitypub-comment';
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}
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return $classes;
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}
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}
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