activitypub / includes / scheduler / class-post.php

class-post.php in ActivityPub 8.2.0, at includes/scheduler/class-post.php

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1	<?php
2	/**
3	* Post scheduler class file.
4	*
5	* @package Activitypub
6	*/
7
8	namespace Activitypub\Scheduler;
9
10	use Activitypub\Activity\Activity;
11	use Activitypub\Collection\Actors;
12
13	use function Activitypub\add_to_outbox;
14	use function Activitypub\get_content_visibility;
15	use function Activitypub\get_post_id;
16	use function Activitypub\get_wp_object_state;
17	use function Activitypub\is_post_disabled;
18
19	/**
20	* Post scheduler class.
21	*/
22	class Post {
23	/**
24	* Initialize the class, registering WordPress hooks.
25	*/
26	public static function init() {
27	// Post transitions.
28	\add_action( 'wp_after_insert_post', array( self::class, 'triage' ), 33, 4 );
29
30	// Attachment transitions.
31	\add_action( 'add_attachment', array( self::class, 'transition_attachment_status' ) );
32	\add_action( 'edit_attachment', array( self::class, 'transition_attachment_status' ) );
33	\add_action( 'delete_attachment', array( self::class, 'transition_attachment_status' ) );
34
35	/*
36	* Sticky post transitions (featured collection).
37	*
38	* Note: These hooks run in addition to the legacy sticky hooks in
39	* Actor scheduler, which send an Update activity when a post becomes
40	* sticky or is unstuck. This means a sticky/unsticky event will cause both:
41	* - an Add/Remove activity for the Actor's featured collection (below), and
42	* - an Update activity (from Actor scheduler).
43	* The Update activity is kept for backwards compatibility.
44	*/
45	\add_action( 'post_stuck', array( self::class, 'schedule_featured_add' ) );
46	\add_action( 'post_unstuck', array( self::class, 'schedule_featured_remove' ) );
47	}
48
49	/**
50	* Triage post transitions and determine the appropriate Activity type.
51	*
52	* @param int $post_id Post ID.
53	* @param \WP_Post $post Post object.
54	* @param bool $update Whether this is an existing post being updated.
55	* @param \WP_Post $post_before Post object before the update.
56	*/
57	public static function triage( $post_id, $post, $update, $post_before ) {
58	if ( defined( 'WP_IMPORTING' ) && WP_IMPORTING ) {
59	return;
60	}
61
62	if ( is_post_disabled( $post ) ) {
63	return;
64	}
65
66	$object_status = get_wp_object_state( $post );
67
68	// If the post is already soft-deleted, do not create any more activities.
69	if (
70	ACTIVITYPUB_OBJECT_STATE_DELETED === $object_status &&
71	in_array( get_content_visibility( $post ), array( ACTIVITYPUB_CONTENT_VISIBILITY_LOCAL, ACTIVITYPUB_CONTENT_VISIBILITY_PRIVATE ), true )
72	) {
73	return;
74	}
75
76	// Bail on bulk edits, unless post author or post status changed.
77	if ( isset( $_REQUEST['bulk_edit'] ) && ( ! isset( $_REQUEST['post_author'] ) \|\| -1 === (int) $_REQUEST['post_author'] ) && -1 === (int) $_REQUEST['_status'] ) { // phpcs:ignore WordPress
78	return;
79	}
80
81	$new_status = get_post_status( $post );
82	$old_status = $post_before ? get_post_status( $post_before ) : null;
83
84	switch ( $new_status ) {
85	case 'publish':
86	if ( $update ) {
87	$type = ( 'publish' === $old_status ) ? 'Update' : 'Create';
88	} else {
89	$type = 'Create';
90	}
91	break;
92
93	case 'draft':
94	case 'pending':
95	$type = ( 'publish' === $old_status ) ? 'Update' : false;
96	break;
97
98	case 'trash':
99	$type = ACTIVITYPUB_OBJECT_STATE_FEDERATED === $object_status ? 'Delete' : false;
100	break;
101
102	default:
103	$type = false;
104	}
105
106	// Do not send Activities if `$type` is not set or unknown.
107	if ( empty( $type ) ) {
108	return;
109	}
110
111	/*
112	* If the post was already federated and this is a Create, skip.
113	* The outbox controller already added it to the outbox.
114	*/
115	if ( ACTIVITYPUB_OBJECT_STATE_FEDERATED === $object_status && 'Create' === $type ) {
116	return;
117	}
118
119	// If the post was never federated before, it should be a Create activity.
120	if ( empty( $object_status ) && 'Update' === $type ) {
121	$type = 'Create';
122	}
123
124	// If the post was federated before but is now local or private, it should be a Delete activity.
125	if ( ACTIVITYPUB_OBJECT_STATE_FEDERATED === $object_status && in_array( get_content_visibility( $post ), array( ACTIVITYPUB_CONTENT_VISIBILITY_LOCAL, ACTIVITYPUB_CONTENT_VISIBILITY_PRIVATE ), true ) ) {
126	$type = 'Delete';
127	}
128
129	add_to_outbox( $post, $type, $post->post_author );
130	}
131
132	/**
133	* Schedules Activities for attachment transitions.
134	*
135	* @param int $post_id Attachment ID.
136	*/
137	public static function transition_attachment_status( $post_id ) {
138	if ( \defined( 'WP_IMPORTING' ) && WP_IMPORTING ) {
139	return;
140	}
141
142	if ( ! \post_type_supports( 'attachment', 'activitypub' ) ) {
143	return;
144	}
145
146	if ( is_post_disabled( $post_id ) ) {
147	return;
148	}
149
150	$post = \get_post( $post_id );
151
152	if ( ! $post instanceof \WP_Post ) {
153	return;
154	}
155
156	switch ( \current_action() ) {
157	case 'add_attachment':
158	$type = 'Create';
159	break;
160	case 'edit_attachment':
161	$type = 'Update';
162	break;
163	case 'delete_attachment':
164	$type = 'Delete';
165	break;
166	default:
167	return;
168	}
169
170	add_to_outbox( $post, $type, $post->post_author );
171	}
172
173	/**
174	* Schedule an Add activity when a post is added to the featured collection.
175	*
176	* @param int $post_id The post ID.
177	*/
178	public static function schedule_featured_add( $post_id ) {
179	self::schedule_featured_update( $post_id, 'Add' );
180	}
181
182	/**
183	* Schedule a Remove activity when a post is removed from the featured collection.
184	*
185	* @param int $post_id The post ID.
186	*/
187	public static function schedule_featured_remove( $post_id ) {
188	self::schedule_featured_update( $post_id, 'Remove' );
189	}
190
191	/**
192	* Schedule an Add or Remove activity for the featured collection.
193	*
194	* When a post's sticky status changes, this sends an Add or Remove activity
195	* to notify followers about the change to the actor's featured collection.
196	*
197	* @see https://github.com/Automattic/wordpress-activitypub/issues/2795
198	*
199	* @param int $post_id The post ID.
200	* @param string $activity_type The activity type ('Add' or 'Remove').
201	*/
202	private static function schedule_featured_update( $post_id, $activity_type ) {
203	if ( \defined( 'WP_IMPORTING' ) && WP_IMPORTING ) {
204	return;
205	}
206
207	$post = \get_post( $post_id );
208
209	if ( ! $post ) {
210	return;
211	}
212
213	if ( is_post_disabled( $post ) ) {
214	return;
215	}
216
217	$actor = Actors::get_by_id( $post->post_author );
218
219	if ( ! $actor \|\| \is_wp_error( $actor ) ) {
220	return;
221	}
222
223	$activity = new Activity();
224	$activity->set_type( $activity_type );
225	$activity->set_actor( $actor->get_id() );
226	$activity->set_object( get_post_id( $post->ID ) );
227	$activity->set_target( $actor->get_featured() );
228
229	add_to_outbox( $activity, null, $post->post_author );
230	}
231	}
232