activitypub / includes / class-hashtag.php

class-hashtag.php in ActivityPub 4.0.2, at includes/class-hashtag.php

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1	<?php
2	/**
3	* Hashtag Class.
4	*
5	* @package Activitypub
6	*/
7
8	namespace Activitypub;
9
10	/**
11	* ActivityPub Hashtag Class.
12	*
13	* @author Matthias Pfefferle
14	*/
15	class Hashtag {
16	/**
17	* Initialize the class, registering WordPress hooks.
18	*/
19	public static function init() {
20	if ( '1' === \get_option( 'activitypub_use_hashtags', '1' ) ) {
21	\add_action( 'wp_insert_post', array( self::class, 'insert_post' ), 10, 2 );
22	\add_filter( 'the_content', array( self::class, 'the_content' ) );
23	\add_filter( 'activitypub_activity_object_array', array( self::class, 'filter_activity_object' ), 99 );
24	}
25	}
26
27	/**
28	* Filter only the activity object and replace summery it with URLs.
29	*
30	* @param array $activity The activity object array.
31	*
32	* @return array The filtered activity object array.
33	*/
34	public static function filter_activity_object( $activity ) {
35	/* phpcs:ignore Squiz.PHP.CommentedOutCode.Found
36	Only changed it for Person and Group as long is not merged: https://github.com/mastodon/mastodon/pull/28629
37	*/
38	if ( ! empty( $activity['summary'] ) && in_array( $activity['type'], array( 'Person', 'Group' ), true ) ) {
39	$activity['summary'] = self::the_content( $activity['summary'] );
40	}
41
42	if ( ! empty( $activity['content'] ) ) {
43	$activity['content'] = self::the_content( $activity['content'] );
44	}
45
46	return $activity;
47	}
48
49	/**
50	* Filter to save #tags as real WordPress tags.
51	*
52	* @param int $post_id Post ID.
53	* @param \WP_Post $post Post object.
54	*/
55	public static function insert_post( $post_id, $post ) {
56	$tags = array();
57
58	if ( \preg_match_all( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', $post->post_content, $match ) ) {
59	$tags = array_merge( $tags, $match[1] );
60	}
61
62	if ( \preg_match_all( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', $post->post_excerpt, $match ) ) {
63	$tags = array_merge( $tags, $match[1] );
64	}
65
66	$tags = \implode( ', ', $tags );
67
68	\wp_add_post_tags( $post->ID, $tags );
69	}
70
71	/**
72	* Filter to replace the #tags in the content with links.
73	*
74	* @param string $the_content The post content.
75	*
76	* @return string The filtered post content.
77	*/
78	public static function the_content( $the_content ) {
79	return enrich_content_data( $the_content, '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', array( self::class, 'replace_with_links' ) );
80	}
81
82	/**
83	* A callback for preg_replace to build the term links.
84	*
85	* @param array $result The preg_match results.
86	* @return string the final string
87	*/
88	public static function replace_with_links( $result ) {
89	$tag = $result[1];
90	$tag_object = \get_term_by( 'name', $tag, 'post_tag' );
91	if ( ! $tag_object ) {
92	$tag_object = \get_term_by( 'name', $tag, 'category' );
93	}
94
95	if ( $tag_object ) {
96	$link = \get_term_link( $tag_object, 'post_tag' );
97	return \sprintf( '<a rel="tag" class="hashtag u-tag u-category" href="%s">#%s</a>', esc_url( $link ), $tag );
98	}
99
100	return '#' . $tag;
101	}
102	}
103