activitypub / includes / class-hashtag.php

class-hashtag.php in ActivityPub 3.2.5, at includes/class-hashtag.php

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1	<?php
2	namespace Activitypub;
3
4	use function Activitypub\enrich_content_data;
5
6	/**
7	* ActivityPub Hashtag Class
8	*
9	* @author Matthias Pfefferle
10	*/
11	class Hashtag {
12	/**
13	* Initialize the class, registering WordPress hooks
14	*/
15	public static function init() {
16	if ( '1' === \get_option( 'activitypub_use_hashtags', '1' ) ) {
17	\add_action( 'wp_insert_post', array( self::class, 'insert_post' ), 10, 2 );
18	\add_filter( 'the_content', array( self::class, 'the_content' ), 10, 1 );
19	\add_filter( 'activitypub_activity_object_array', array( self::class, 'filter_activity_object' ), 99 );
20	}
21	}
22
23	/**
24	* Filter only the activity object and replace summery it with URLs
25	*
26	* @param $object_array array of activity
27	*
28	* @return array the activity object array
29	*/
30	public static function filter_activity_object( $object_array ) {
31	/* Removed until this is merged: https://github.com/mastodon/mastodon/pull/28629
32	if ( ! empty( $object_array['summary'] ) ) {
33	$object_array['summary'] = self::the_content( $object_array['summary'] );
34	}
35	*/
36
37	if ( ! empty( $object_array['content'] ) ) {
38	$object_array['content'] = self::the_content( $object_array['content'] );
39	}
40
41	return $object_array;
42	}
43
44	/**
45	* Filter to save #tags as real WordPress tags
46	*
47	* @param int $id the rev-id
48	* @param WP_Post $post the post
49	*
50	* @return
51	*/
52	public static function insert_post( $id, $post ) {
53	$tags = array();
54
55	if ( \preg_match_all( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', $post->post_content, $match ) ) {
56	$tags = array_merge( $tags, $match[1] );
57	}
58
59	if ( \preg_match_all( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', $post->post_excerpt, $match ) ) {
60	$tags = array_merge( $tags, $match[1] );
61	}
62
63	$tags = \implode( ', ', $tags );
64
65	\wp_add_post_tags( $post->ID, $tags );
66
67	return $id;
68	}
69
70	/**
71	* Filter to replace the #tags in the content with links
72	*
73	* @param string $the_content the post-content
74	*
75	* @return string the filtered post-content
76	*/
77	public static function the_content( $the_content ) {
78	return enrich_content_data( $the_content, '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', array( self::class, 'replace_with_links' ) );
79	}
80
81	/**
82	* A callback for preg_replace to build the term links
83	*
84	* @param array $result the preg_match results
85	* @return string the final string
86	*/
87	public static function replace_with_links( $result ) {
88	$tag = $result[1];
89	$tag_object = \get_term_by( 'name', $tag, 'post_tag' );
90	if ( ! $tag_object ) {
91	$tag_object = \get_term_by( 'name', $tag, 'category' );
92	}
93
94	if ( $tag_object ) {
95	$link = \get_term_link( $tag_object, 'post_tag' );
96	return \sprintf( '<a rel="tag" class="hashtag u-tag u-category" href="%s">#%s</a>', $link, $tag );
97	}
98
99	return '#' . $tag;
100	}
101	}
102