MB_IN_BYTES ) { return $the_content; } $tag_stack = array(); $protected_tags = array( 'pre', 'code', 'textarea', 'style', 'a', ); $content_with_links = ''; $in_protected_tag = false; foreach ( wp_html_split( $the_content ) as $chunk ) { if ( preg_match( '#^$#i', $chunk, $m ) ) { $content_with_links .= $chunk; continue; } if ( preg_match( '#^<(/)?([a-z-]+)\b[^>]*>$#i', $chunk, $m ) ) { $tag = strtolower( $m[2] ); if ( '/' === $m[1] ) { // Closing tag. $i = array_search( $tag, $tag_stack ); // We can only remove the tag from the stack if it is in the stack. if ( false !== $i ) { $tag_stack = array_slice( $tag_stack, 0, $i ); } } else { // Opening tag, add it to the stack. $tag_stack[] = $tag; } // If we're in a protected tag, the tag_stack contains at least one protected tag string. // The protected tag state can only change when we encounter a start or end tag. $in_protected_tag = array_intersect( $tag_stack, $protected_tags ); // Never inspect tags. $content_with_links .= $chunk; continue; } if ( $in_protected_tag ) { // Don't inspect a chunk inside an inspected tag. $content_with_links .= $chunk; continue; } // Only reachable when there is no protected tag in the stack. $content_with_links .= \preg_replace_callback( '/@' . ACTIVITYPUB_USERNAME_REGEXP . '/', array( self::class, 'replace_with_links' ), $chunk ); } return $content_with_links; } /** * A callback for preg_replace to build the user links * * @param array $result the preg_match results * * @return string the final string */ public static function replace_with_links( $result ) { $metadata = get_remote_metadata_by_actor( $result[0] ); if ( ! empty( $metadata ) && ! is_wp_error( $metadata ) && ! empty( $metadata['url'] ) ) { $username = ltrim( $result[0], '@' ); if ( ! empty( $metadata['name'] ) ) { $username = $metadata['name']; } if ( ! empty( $metadata['preferredUsername'] ) ) { $username = $metadata['preferredUsername']; } return \sprintf( '@%s', esc_url( $metadata['url'] ), esc_html( $username ) ); } return $result[0]; } /** * Get the Inboxes for the mentioned Actors * * @param array $mentioned The list of Actors that were mentioned * * @return array The list of Inboxes */ public static function get_inboxes( $mentioned ) { $inboxes = array(); foreach ( $mentioned as $actor ) { $inbox = self::get_inbox_by_mentioned_actor( $actor ); if ( ! is_wp_error( $inbox ) && $inbox ) { $inboxes[] = $inbox; } } return $inboxes; } /** * Get the inbox from the Remote-Profile of a mentioned Actor * * @param string $actor The Actor-URL * * @return string The Inbox-URL */ public static function get_inbox_by_mentioned_actor( $actor ) { $metadata = get_remote_metadata_by_actor( $actor ); if ( \is_wp_error( $metadata ) ) { return $metadata; } if ( isset( $metadata['endpoints'] ) && isset( $metadata['endpoints']['sharedInbox'] ) ) { return $metadata['endpoints']['sharedInbox']; } if ( \array_key_exists( 'inbox', $metadata ) ) { return $metadata['inbox']; } return new WP_Error( 'activitypub_no_inbox', \__( 'No "Inbox" found', 'activitypub' ), $metadata ); } /** * Extract the mentions from the post_content. * * @param array $mentions The already found mentions. * @param string $post_content The post content. * * @return mixed The discovered mentions. */ public static function extract_mentions( $mentions, $post_content ) { \preg_match_all( '/@' . ACTIVITYPUB_USERNAME_REGEXP . '/i', $post_content, $matches ); foreach ( $matches[0] as $match ) { $link = Webfinger::resolve( $match ); if ( ! is_wp_error( $link ) ) { $mentions[ $match ] = $link; } } return $mentions; } }