self::generate_id( $comment ), 'commentId' => $comment->comment_ID, ); $div = sprintf( '

', esc_attr( wp_json_encode( $attrs ) ) ); return apply_filters( 'activitypub_comment_reply_link', $div ); } /** * Check if it is allowed to comment to a comment. * * Checks if the comment is local only or if the user can comment federated comments. * * @param mixed $comment Comment object or ID. * * @return boolean True if the user can comment, false otherwise. */ public static function are_comments_allowed( $comment ) { $comment = \get_comment( $comment ); if ( ! self::was_received( $comment ) ) { return true; } $current_user = get_current_user_id(); if ( ! $current_user ) { return false; } $is_user_disabled = is_user_disabled( $current_user ); if ( $is_user_disabled ) { return false; } return true; } /** * Check if a comment is federated. * * We consider a comment federated if comment was received via ActivityPub. * * Use this function to check if it is comment that was received via ActivityPub. * * @param mixed $comment Comment object or ID. * * @return boolean True if the comment is federated, false otherwise. */ public static function was_received( $comment ) { $comment = \get_comment( $comment ); if ( ! $comment ) { return false; } $protocol = \get_comment_meta( $comment->comment_ID, 'protocol', true ); if ( 'activitypub' === $protocol ) { return true; } return false; } /** * Check if a comment was federated. * * This function checks if a comment was federated via ActivityPub. * * @param mixed $comment Comment object or ID. * * @return boolean True if the comment was federated, false otherwise. */ public static function was_sent( $comment ) { $comment = \get_comment( $comment ); if ( ! $comment ) { return false; } $status = \get_comment_meta( $comment->comment_ID, 'activitypub_status', true ); if ( $status ) { return true; } return false; } /** * Check if a comment is local only. * * This function checks if a comment is local only and was not sent or received via ActivityPub. * * @param mixed $comment Comment object or ID. * * @return boolean True if the comment is local only, false otherwise. */ public static function is_local( $comment ) { if ( self::was_sent( $comment ) || self::was_received( $comment ) ) { return false; } return true; } /** * Check if a comment should be federated. * * We consider a comment should be federated if it is authored by a user that is * not disabled for federation and if it is a reply directly to the post or to a * federated comment. * * Use this function to check if a comment should be federated. * * @param mixed $comment Comment object or ID. * * @return boolean True if the comment should be federated, false otherwise. */ public static function should_be_federated( $comment ) { // we should not federate federated comments if ( self::was_received( $comment ) ) { return false; } $comment = \get_comment( $comment ); $user_id = $comment->user_id; // comments without user can't be federated if ( ! $user_id ) { return false; } $is_user_disabled = is_user_disabled( $user_id ); // user is disabled for federation if ( $is_user_disabled ) { return false; } // it is a comment to the post and can be federated if ( empty( $comment->comment_parent ) ) { return true; } // check if parent comment is federated $parent_comment = \get_comment( $comment->comment_parent ); return ! self::is_local( $parent_comment ); } /** * Examine a comment ID and look up an existing comment it represents. * * @param string $id ActivityPub object ID (usually a URL) to check. * * @return int|boolean Comment ID, or false on failure. */ public static function object_id_to_comment( $id ) { $comment_query = new WP_Comment_Query( array( 'meta_key' => 'source_id', // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key 'meta_value' => $id, // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_value ) ); if ( ! $comment_query->comments ) { return false; } if ( count( $comment_query->comments ) > 1 ) { return false; } return $comment_query->comments[0]; } /** * Verify if URL is a local comment, or if it is a previously received * remote comment (For threading comments locally) * * @param string $url The URL to check. * * @return int comment_ID or null if not found */ public static function url_to_commentid( $url ) { if ( ! $url || ! filter_var( $url, \FILTER_VALIDATE_URL ) ) { return null; } // check for local comment if ( \wp_parse_url( \site_url(), \PHP_URL_HOST ) === \wp_parse_url( $url, \PHP_URL_HOST ) ) { $query = \wp_parse_url( $url, \PHP_URL_QUERY ); if ( $query ) { parse_str( $query, $params ); if ( ! empty( $params['c'] ) ) { $comment = \get_comment( $params['c'] ); if ( $comment ) { return $comment->comment_ID; } } } } $args = array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query 'meta_query' => array( 'relation' => 'OR', array( 'key' => 'source_url', 'value' => $url, ), array( 'key' => 'source_id', 'value' => $url, ), ), ); $query = new WP_Comment_Query(); $comments = $query->query( $args ); if ( $comments && is_array( $comments ) ) { return $comments[0]->comment_ID; } return null; } /** * 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; } /** * 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; } /** * Generates an ActivityPub URI for a comment * * @param WP_Comment|int $comment A comment object or comment ID * * @return string ActivityPub URI for comment */ public static function generate_id( $comment ) { $comment = get_comment( $comment ); // show external comment ID if it exists $source_id = get_comment_meta( $comment->comment_ID, 'source_id', true ); if ( ! empty( $source_id ) ) { return $source_id; } // generate URI based on comment ID return \add_query_arg( array( 'c' => $comment->comment_ID, ), \trailingslashit( site_url() ) ); } /** * Enqueue scripts for remote comments */ public static function enqueue_scripts() { if ( ! is_singular() ) { return; } $handle = 'activitypub-remote-reply'; $data = array( 'namespace' => ACTIVITYPUB_REST_NAMESPACE, ); $js = sprintf( 'var _activityPubOptions = %s;', wp_json_encode( $data ) ); $asset_file = ACTIVITYPUB_PLUGIN_DIR . 'build/remote-reply/index.asset.php'; if ( \file_exists( $asset_file ) ) { $assets = require_once $asset_file; \wp_enqueue_script( $handle, \plugins_url( 'build/remote-reply/index.js', __DIR__ ), $assets['dependencies'], $assets['version'], true ); \wp_add_inline_script( $handle, $js, 'before' ); \wp_enqueue_style( $handle, \plugins_url( 'build/remote-reply/style-index.css', __DIR__ ), [ 'wp-components' ], $assets['version'] ); } } }