activitypub / includes / class-link.php

class-link.php in ActivityPub 7.1.0, at includes/class-link.php

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1	<?php
2	/**
3	* Link class.
4	*
5	* @package Activitypub
6	*/
7
8	namespace Activitypub;
9
10	/**
11	* ActivityPub Summery Links Class.
12	*/
13	class Link {
14
15	/**
16	* Initialize the class, registering WordPress hooks.
17	*/
18	public static function init() {
19	\add_filter( 'activitypub_extra_field_content', array( self::class, 'the_content' ) );
20	\add_filter( 'activitypub_activity_object_array', array( self::class, 'filter_activity_object' ), 99 );
21	}
22
23	/**
24	* Filter only the activity object and replace the summary with URLs.
25	*
26	* @param array $activity The activity object array.
27	*
28	* @return array Rhe activity object array.
29	*/
30	public static function filter_activity_object( $activity ) {
31	if ( ! empty( $activity['summary'] ) ) {
32	$activity['summary'] = self::the_content( $activity['summary'] );
33	}
34
35	if ( ! empty( $activity['content'] ) ) {
36	$activity['content'] = self::the_content( $activity['content'] );
37	}
38
39	return $activity;
40	}
41
42	/**
43	* Filter to replace the URLS in the content with links
44	*
45	* @param string $the_content The post content.
46	*
47	* @return string the filtered post content.
48	*/
49	public static function the_content( $the_content ) {
50	return enrich_content_data( $the_content, '/' . ACTIVITYPUB_URL_REGEXP . '/i', array( self::class, 'replace_with_links' ) );
51	}
52
53	/**
54	* A callback for preg_replace to build the links.
55	*
56	* Link shortening https://docs.joinmastodon.org/api/guidelines/#links
57	*
58	* @param array $result The preg_match results.
59	*
60	* @return string The final string.
61	*/
62	public static function replace_with_links( $result ) {
63	if ( 'www.' === substr( $result[0], 0, 4 ) ) {
64	$result[0] = 'https://' . $result[0];
65	}
66	$parsed_url = \wp_parse_url( html_entity_decode( $result[0] ) );
67	if ( ! $parsed_url \|\| empty( $parsed_url['host'] ) ) {
68	return $result[0];
69	}
70
71	if ( empty( $parsed_url['scheme'] ) ) {
72	$invisible_prefix = 'https://';
73	} else {
74	$invisible_prefix = $parsed_url['scheme'] . '://';
75	}
76	if ( ! empty( $parsed_url['user'] ) ) {
77	$invisible_prefix .= $parsed_url['user'];
78	}
79	if ( ! empty( $parsed_url['pass'] ) ) {
80	$invisible_prefix .= ':' . $parsed_url['pass'];
81	}
82	if ( ! empty( $parsed_url['user'] ) ) {
83	$invisible_prefix .= '@';
84	}
85
86	$text_url = $parsed_url['host'];
87	if ( 'www.' === substr( $text_url, 0, 4 ) ) {
88	$text_url = substr( $text_url, 4 );
89	$invisible_prefix .= 'www.';
90	}
91	if ( ! empty( $parsed_url['port'] ) ) {
92	$text_url .= ':' . $parsed_url['port'];
93	}
94	if ( ! empty( $parsed_url['path'] ) ) {
95	$text_url .= $parsed_url['path'];
96	}
97	if ( ! empty( $parsed_url['query'] ) ) {
98	$text_url .= '?' . $parsed_url['query'];
99	}
100	if ( ! empty( $parsed_url['fragment'] ) ) {
101	$text_url .= '#' . $parsed_url['fragment'];
102	}
103
104	$display = \substr( $text_url, 0, 30 );
105	$invisible_suffix = \substr( $text_url, 30 );
106
107	$display_class = '';
108	if ( $invisible_suffix ) {
109	$display_class .= 'ellipsis';
110	}
111
112	/**
113	* Filters the rel attribute for ActivityPub links.
114	*
115	* @param string $rel The rel attribute string. Default 'nofollow noopener noreferrer'.
116	*/
117	$rel = apply_filters( 'activitypub_link_rel', 'nofollow noopener noreferrer' );
118
119	return \sprintf(
120	'<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>',
121	esc_url( $result[0] ),
122	$rel,
123	esc_html( $invisible_prefix ),
124	$display_class,
125	esc_html( $display ),
126	esc_html( $invisible_suffix )
127	);
128	}
129	}
130