activitypub / includes / class-activitypub.php

class-activitypub.php in ActivityPub 0.14.1, 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
29	/**
30	* Return a AS2 JSON version of an author, post or page.
31	*
32	* @param string $template The path to the template object.
33	*
34	* @return string The new path to the JSON template.
35	*/
36	public static function render_json_template( $template ) {
37	if ( ! \is_author() && ! \is_singular() && ! \is_home() ) {
38	return $template;
39	}
40
41	if ( \is_author() ) {
42	$json_template = \dirname( __FILE__ ) . '/../templates/author-json.php';
43	} elseif ( \is_singular() ) {
44	$json_template = \dirname( __FILE__ ) . '/../templates/post-json.php';
45	} elseif ( \is_home() ) {
46	$json_template = \dirname( __FILE__ ) . '/../templates/blog-json.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 'activitypub' query variable so WordPress won't mangle it.
85	*/
86	public static function add_query_vars( $vars ) {
87	$vars[] = 'activitypub';
88
89	return $vars;
90	}
91
92	/**
93	* Add our rewrite endpoint to permalinks and pages.
94	*/
95	public static function add_rewrite_endpoint() {
96	\add_rewrite_endpoint( 'activitypub', EP_AUTHORS \| EP_PERMALINK \| EP_PAGES );
97	}
98
99	/**
100	* Schedule Activities.
101	*
102	* @param string $new_status New post status.
103	* @param string $old_status Old post status.
104	* @param WP_Post $post Post object.
105	*/
106	public static function schedule_post_activity( $new_status, $old_status, $post ) {
107	// Do not send activities if post is password protected.
108	if ( \post_password_required( $post ) ) {
109	return;
110	}
111
112	// Check if post-type supports ActivityPub.
113	$post_types = \get_post_types_by_support( 'activitypub' );
114	if ( ! \in_array( $post->post_type, $post_types, true ) ) {
115	return;
116	}
117
118	$activitypub_post = new \Activitypub\Model\Post( $post );
119
120	if ( 'publish' === $new_status && 'publish' !== $old_status ) {
121	\wp_schedule_single_event( \time(), 'activitypub_send_post_activity', array( $activitypub_post ) );
122	} elseif ( 'publish' === $new_status ) {
123	\wp_schedule_single_event( \time(), 'activitypub_send_update_activity', array( $activitypub_post ) );
124	} elseif ( 'trash' === $new_status ) {
125	\wp_schedule_single_event( \time(), 'activitypub_send_delete_activity', array( $activitypub_post ) );
126	}
127	}
128
129	/**
130	* Replaces the default avatar.
131	*
132	* @param array $args Arguments passed to get_avatar_data(), after processing.
133	* @param int\|string\|object $id_or_email A user ID, email address, or comment object.
134	*
135	* @return array $args
136	*/
137	public static function pre_get_avatar_data( $args, $id_or_email ) {
138	if (
139	! $id_or_email instanceof \WP_Comment \|\|
140	! isset( $id_or_email->comment_type ) \|\|
141	$id_or_email->user_id
142	) {
143	return $args;
144	}
145
146	$allowed_comment_types = \apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
147	if ( ! empty( $id_or_email->comment_type ) && ! \in_array( $id_or_email->comment_type, (array) $allowed_comment_types, true ) ) {
148	$args['url'] = false;
149	/** This filter is documented in wp-includes/link-template.php */
150	return \apply_filters( 'get_avatar_data', $args, $id_or_email );
151	}
152
153	// Check if comment has an avatar.
154	$avatar = self::get_avatar_url( $id_or_email->comment_ID );
155
156	if ( $avatar ) {
157	if ( ! isset( $args['class'] ) \|\| ! \is_array( $args['class'] ) ) {
158	$args['class'] = array( 'u-photo' );
159	} else {
160	$args['class'][] = 'u-photo';
161	$args['class'] = \array_unique( $args['class'] );
162	}
163	$args['url'] = $avatar;
164	$args['class'][] = 'avatar-activitypub';
165	}
166
167	return $args;
168	}
169
170	/**
171	* Function to retrieve Avatar URL if stored in meta.
172	*
173	* @param int\|WP_Comment $comment
174	*
175	* @return string $url
176	*/
177	public static function get_avatar_url( $comment ) {
178	if ( \is_numeric( $comment ) ) {
179	$comment = \get_comment( $comment );
180	}
181	return \get_comment_meta( $comment->comment_ID, 'avatar_url', true );
182	}
183	}
184