# activitypub/3.2.4/includes/class-link.php

ActivityPub, version 3.2.4. 122 lines.

- Page: https://pluginprobe.com/plugins/activitypub/3.2.4/code/includes/class-link.php
- Raw: https://pluginprobe.com/plugins/activitypub/3.2.4/raw/includes/class-link.php
- Modified: 2024-09-15T12:42:28+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/activitypub/3.2.4/code/includes/class-link.php#L10-L20`.

```php
<?php
namespace Activitypub;

use function Activitypub\enrich_content_data;

/**
 * ActivityPub Summery Links Class
 */
class Link {

	/**
	 * Initialize the class, registering WordPress hooks
	 */
	public static function init() {
		\add_filter( 'activitypub_extra_field_content', array( self::class, 'the_content' ), 10, 1 );
		\add_filter( 'activitypub_activity_object_array', array( self::class, 'filter_activity_object' ), 99 );
	}

	/**
	 * Filter only the activity object and replace summery it with URLs
	 *
	 * @param $object_array array of activity
	 *
	 * @return array the activity object array
	 */
	public static function filter_activity_object( $object_array ) {
		/* Removed until this is merged: https://github.com/mastodon/mastodon/pull/28629
		if ( ! empty( $object_array['summary'] ) ) {
			$object_array['summary'] = self::the_content( $object_array['summary'] );
		}
		*/

		if ( ! empty( $object_array['content'] ) ) {
			$object_array['content'] = self::the_content( $object_array['content'] );
		}

		return $object_array;
	}

	/**
	 * Filter to replace the URLS in the content with links
	 *
	 * @param string $the_content the post-content
	 *
	 * @return string the filtered post-content
	 */
	public static function the_content( $the_content ) {
		return enrich_content_data( $the_content, '/' . ACTIVITYPUB_URL_REGEXP . '/i', array( self::class, 'replace_with_links' ) );
	}

	/**
	 * A callback for preg_replace to build the links
	 *
	 * Link shortening https://docs.joinmastodon.org/api/guidelines/#links
	 *
	 * @param array $result the preg_match results
	 * @return string the final string
	 */
	public static function replace_with_links( $result ) {
		if ( 'www.' === substr( $result[0], 0, 4 ) ) {
			$result[0] = 'https://' . $result[0];
		}
		$parsed_url = \wp_parse_url( html_entity_decode( $result[0] ) );
		if ( ! $parsed_url ) {
			return $result[0];
		}

		if ( empty( $parsed_url['scheme'] ) ) {
			$invisible_prefix = 'https://';
		} else {
			$invisible_prefix = $parsed_url['scheme'] . '://';
		}
		if ( ! empty( $parsed_url['user'] ) ) {
			$invisible_prefix .= $parsed_url['user'];
		}
		if ( ! empty( $parsed_url['pass'] ) ) {
			$invisible_prefix .= ':' . $parsed_url['pass'];
		}
		if ( ! empty( $parsed_url['user'] ) ) {
			$invisible_prefix .= '@';
		}

		$text_url = $parsed_url['host'];
		if ( 'www.' === substr( $text_url, 0, 4 ) ) {
			$text_url = substr( $text_url, 4 );
			$invisible_prefix .= 'www.';
		}
		if ( ! empty( $parsed_url['port'] ) ) {
			$text_url .= ':' . $parsed_url['port'];
		}
		if ( ! empty( $parsed_url['path'] ) ) {
			$text_url .= $parsed_url['path'];
		}
		if ( ! empty( $parsed_url['query'] ) ) {
			$text_url .= '?' . $parsed_url['query'];
		}
		if ( ! empty( $parsed_url['fragment'] ) ) {
			$text_url .= '#' . $parsed_url['fragment'];
		}

		$display = \substr( $text_url, 0, 30 );
		$invisible_suffix = \substr( $text_url, 30 );

		$display_class = '';
		if ( $invisible_suffix ) {
			$display_class .= 'ellipsis';
		}

		$rel = apply_filters( 'activitypub_link_rel', 'nofollow noopener noreferrer' );

		return \sprintf(
			'<a href="%s" target="_blank" rel="%s" translate="no"><span class="invisible">%s</span><span class="%s">%s</span><span class="invisible">%s</span></a>',
			esc_url( $result[0] ),
			$rel,
			esc_html( $invisible_prefix ),
			$display_class,
			esc_html( $display ),
			esc_html( $invisible_suffix )
		);
	}
}

```