activitypub / includes / class-activitypub.php

class-activitypub.php in ActivityPub 0.9.0, at includes/class-activitypub.php

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1	<?php
2	namespace Activitypub;
3
4	/**
5	* ActivityPub Class
6	*
7	* @author Matthias Pfefferle
8	*/
9	class Activitypub {
10	/**
11	* Initialize the class, registering WordPress hooks
12	*/
13	public static function init() {
14	\add_filter( 'template_include', array( '\Activitypub\Activitypub', 'render_json_template' ), 99 );
15	\add_filter( 'query_vars', array( '\Activitypub\Activitypub', 'add_query_vars' ) );
16	\add_action( 'init', array( '\Activitypub\Activitypub', 'add_rewrite_endpoint' ) );
17	\add_filter( 'pre_get_avatar_data', array( '\Activitypub\Activitypub', 'pre_get_avatar_data' ), 11, 2 );
18
19	// Add support for ActivityPub to custom post types
20	$post_types = \get_option( 'activitypub_support_post_types', array( 'post', 'page' ) ) ? \get_option( 'activitypub_support_post_types', array( 'post', 'page' ) ) : array();
21
22	foreach ( $post_types as $post_type ) {
23	\add_post_type_support( $post_type, 'activitypub' );
24	}
25
26	\add_action( 'transition_post_status', array( '\Activitypub\Activitypub', 'schedule_post_activity' ), 10, 3 );
27
28	\add_action( 'trash_post', array( '\Activitypub\Activitypub', 'schedule_delete_activity' ), 10 );
29	}
30
31	/**
32	* Return a AS2 JSON version of an author, post or page
33	*
34	* @param string $template the path to the template object
35	*
36	* @return string the new path to the JSON template
37	*/
38	public static function render_json_template( $template ) {
39	if ( ! \is_author() && ! \is_singular() ) {
40	return $template;
41	}
42
43	if ( \is_author() ) {
44	$json_template = \dirname( __FILE__ ) . '/../templates/json-author.php';
45	} elseif ( \is_singular() ) {
46	$json_template = \dirname( __FILE__ ) . '/../templates/json-post.php';
47	}
48
49	global $wp_query;
50
51	if ( isset( $wp_query->query_vars['activitypub'] ) ) {
52	return $json_template;
53	}
54
55	if ( ! isset( $_SERVER['HTTP_ACCEPT'] ) ) {
56	return $template;
57	}
58
59	$accept_header = $_SERVER['HTTP_ACCEPT'];
60
61	if (
62	stristr( $accept_header, 'application/activity+json' ) \|\|
63	stristr( $accept_header, 'application/ld+json' )
64	) {
65	return $json_template;
66	}
67
68	// accept header as an array
69	$accept = \explode( ',', trim( $accept_header ) );
70
71	if (
72	\in_array( 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"', $accept, true ) \|\|
73	\in_array( 'application/activity+json', $accept, true ) \|\|
74	\in_array( 'application/ld+json', $accept, true ) \|\|
75	\in_array( 'application/json', $accept, true )
76	) {
77	return $json_template;
78	}
79
80	return $template;
81	}
82
83	/**
84	* Add the 'photos' query variable so WordPress
85	* won't mangle it.
86	*/
87	public static function add_query_vars( $vars ) {
88	$vars[] = 'activitypub';
89
90	return $vars;
91	}
92
93	/**
94	* Add our rewrite endpoint to permalinks and pages.
95	*/
96	public static function add_rewrite_endpoint() {
97	\add_rewrite_endpoint( 'activitypub', EP_AUTHORS \| EP_PERMALINK \| EP_PAGES );
98	}
99
100	/**
101	* Schedule Activities
102	*
103	* @param int $post_id
104	*/
105	public static function schedule_post_activity( $new_status, $old_status, $post ) {
106	// do not send activities if post is password protected
107	if ( \post_password_required( $post ) ) {
108	return;
109	}
110
111	// check if post-type supports ActivityPub
112	$post_types = \get_post_types_by_support( 'activitypub' );
113	if ( ! \in_array( $post->post_type, $post_types, true ) ) {
114	return;
115	}
116
117	if ( 'publish' === $new_status && 'publish' !== $old_status ) {
118	\wp_schedule_single_event( time(), 'activitypub_send_post_activity', array( $post->ID ) );
119	} elseif ( 'publish' === $new_status ) {
120	\wp_schedule_single_event( time(), 'activitypub_send_update_activity', array( $post->ID ) );
121	} elseif ( 'trash' === $new_status ) {
122	\wp_schedule_single_event( time(), 'activitypub_send_delete_activity', array( get_permalink( $post ) ) );
123	}
124	}
125
126	/**
127	* Replaces the default avatar
128	*
129	* @param array $args Arguments passed to get_avatar_data(), after processing.
130	* @param int\|string\|object $id_or_email A user ID, email address, or comment object
131	*
132	* @return array $args
133	*/
134	public static function pre_get_avatar_data( $args, $id_or_email ) {
135	if (
136	! $id_or_email instanceof \WP_Comment \|\|
137	! isset( $id_or_email->comment_type ) \|\|
138	$id_or_email->user_id
139	) {
140	return $args;
141	}
142
143	$allowed_comment_types = \apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
144	if ( ! empty( $id_or_email->comment_type ) && ! \in_array( $id_or_email->comment_type, (array) $allowed_comment_types, true ) ) {
145	$args['url'] = false;
146	/** This filter is documented in wp-includes/link-template.php */
147	return \apply_filters( 'get_avatar_data', $args, $id_or_email );
148	}
149
150	// check if comment has an avatar
151	$avatar = self::get_avatar_url( $id_or_email->comment_ID );
152
153	if ( $avatar ) {
154	if ( ! isset( $args['class'] ) \|\| ! \is_array( $args['class'] ) ) {
155	$args['class'] = array( 'u-photo' );
156	} else {
157	$args['class'][] = 'u-photo';
158	$args['class'] = \array_unique( $args['class'] );
159	}
160	$args['url'] = $avatar;
161	$args['class'][] = 'avatar-activitypub';
162	}
163
164	return $args;
165	}
166
167	/**
168	* Function to retrieve Avatar URL if stored in meta
169	*
170	*
171	* @param int\|WP_Comment $comment
172	*
173	* @return string $url
174	*/
175	public static function get_avatar_url( $comment ) {
176	if ( \is_numeric( $comment ) ) {
177	$comment = \get_comment( $comment );
178	}
179	return \get_comment_meta( $comment->comment_ID, 'avatar_url', true );
180	}
181	}
182