activitypub / includes / rest / class-replies-controller.php

class-replies-controller.php in ActivityPub 8.1.1, at includes/rest/class-replies-controller.php

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1	<?php
2	/**
3	* Replies_Controller file.
4	*
5	* @package Activitypub
6	*/
7
8	namespace Activitypub\Rest;
9
10	use Activitypub\Activity\Base_Object;
11	use Activitypub\Collection\Interactions;
12	use Activitypub\Collection\Replies;
13
14	use function Activitypub\get_rest_url_by_path;
15	use function Activitypub\is_post_publicly_queryable;
16
17	/**
18	* ActivityPub Replies_Controller class.
19	*/
20	class Replies_Controller extends \WP_REST_Controller {
21
22	/**
23	* The namespace of this controller's route.
24	*
25	* @var string
26	*/
27	protected $namespace = ACTIVITYPUB_REST_NAMESPACE;
28
29	/**
30	* The base of this controller's route.
31	*
32	* @var string
33	*/
34	protected $rest_base = '(?P<object_type>[\w\-\.]+)s/(?P<id>[\d]+)/(?P<type>[\w\-\.]+)';
35
36	/**
37	* Register routes.
38	*/
39	public function register_routes() {
40	\register_rest_route(
41	$this->namespace,
42	'/' . $this->rest_base,
43	array(
44	'args' => array(
45	'object_type' => array(
46	'description' => 'The type of object to get replies for.',
47	'type' => 'string',
48	'enum' => array( 'post', 'comment' ),
49	'required' => true,
50	),
51	'id' => array(
52	'description' => 'The ID of the object.',
53	'type' => 'integer',
54	'minimum' => 1,
55	'required' => true,
56	),
57	'type' => array(
58	'description' => 'The type of collection to query.',
59	'type' => 'string',
60	'enum' => array( 'replies', 'likes', 'shares' ),
61	'required' => true,
62	),
63	),
64	array(
65	'methods' => \WP_REST_Server::READABLE,
66	'callback' => array( $this, 'get_items' ),
67	'permission_callback' => '__return_true',
68	'args' => array(
69	'page' => array(
70	'description' => 'Current page of the collection.',
71	'type' => 'integer',
72	'minimum' => 1,
73	// No default so we can differentiate between Collection and CollectionPage requests.
74	),
75	),
76	),
77	'schema' => array( $this, 'get_item_schema' ),
78	)
79	);
80	}
81
82	/**
83	* Retrieves a collection of replies.
84	*
85	* @param \WP_REST_Request $request The request object.
86	*
87	* @return \WP_REST_Response\|\WP_Error Response object or WP_Error object.
88	*/
89	public function get_items( $request ) {
90	$object_type = $request->get_param( 'object_type' );
91	$id = (int) $request->get_param( 'id' );
92
93	if ( 'comment' === $object_type ) {
94	$wp_object = \get_comment( $id );
95
96	/*
97	* A comment inherits the visibility of its parent post. Reject
98	* collections for comments whose parent post is not currently
99	* publicly queryable, so we don't leak metadata for private,
100	* draft, password-protected, or local-only posts — including
101	* posts that were once federated and have since been made
102	* non-public.
103	*/
104	$publicly_queryable = $wp_object && is_post_publicly_queryable( $wp_object->comment_post_ID );
105	} else {
106	$wp_object = \get_post( $id );
107	$publicly_queryable = $wp_object && is_post_publicly_queryable( $wp_object );
108	}
109
110	if ( ! $publicly_queryable ) {
111	return new \WP_Error(
112	'activitypub_replies_collection_does_not_exist',
113	\sprintf(
114	// translators: %s: The type (post, comment, etc.) for which no replies collection exists.
115	\__( 'No reply collection exists for the type %s.', 'activitypub' ),
116	$object_type
117	),
118	array( 'status' => 404 )
119	);
120	}
121
122	switch ( $request->get_param( 'type' ) ) {
123	case 'replies':
124	$response = $this->get_replies( $request, $wp_object );
125	break;
126
127	case 'likes':
128	$response = $this->get_likes( $request, $wp_object );
129	break;
130
131	case 'shares':
132	$response = $this->get_shares( $request, $wp_object );
133	break;
134
135	default:
136	$response = new \WP_Error( 'rest_unknown_collection_type', 'Unknown collection type.', array( 'status' => 404 ) );
137	}
138
139	// Prepend ActivityPub Context.
140	$response = array_merge( array( '@context' => Base_Object::JSON_LD_CONTEXT ), $response );
141	$response = \rest_ensure_response( $response );
142	$response->header( 'Content-Type', 'application/activity+json; charset=' . \get_option( 'blog_charset' ) );
143
144	return $response;
145	}
146
147	/**
148	* Retrieves a collection of replies.
149	*
150	* @param \WP_REST_Request $request The request object.
151	* @param \WP_Post\|\WP_Comment $wp_object The WordPress object.
152	*
153	* @return array Response collection of replies.
154	*/
155	public function get_replies( $request, $wp_object ) {
156	$page = $request->get_param( 'page' );
157
158	// If the request parameter page is present get the CollectionPage otherwise the Replies collection.
159	if ( null === $page ) {
160	$response = Replies::get_collection( $wp_object );
161	} else {
162	$response = Replies::get_collection_page( $wp_object, $page );
163	}
164
165	return $response;
166	}
167
168	/**
169	* Retrieves a collection of likes.
170	*
171	* @param \WP_REST_Request $request The request object.
172	* @param \WP_Post\|\WP_Comment $wp_object The WordPress object.
173	*
174	* @return array Response collection of likes.
175	*/
176	public function get_likes( $request, $wp_object ) {
177	if ( $wp_object instanceof \WP_Post ) {
178	$likes = Interactions::count_by_type( $wp_object->ID, 'like' );
179	} else {
180	$likes = 0;
181	}
182
183	return array(
184	'id' => get_rest_url_by_path( sprintf( 'posts/%d/likes', $wp_object->ID ) ),
185	'type' => 'Collection',
186	'totalItems' => $likes,
187	);
188	}
189
190	/**
191	* Retrieves a collection of shares.
192	*
193	* @param \WP_REST_Request $request The request object.
194	* @param \WP_Post\|\WP_Comment $wp_object The WordPress object.
195	*
196	* @return array Response collection of shares.
197	*/
198	public function get_shares( $request, $wp_object ) {
199	if ( $wp_object instanceof \WP_Post ) {
200	$shares = Interactions::count_by_type( $wp_object->ID, 'repost' ) + Interactions::count_by_type( $wp_object->ID, 'quote' );
201	} else {
202	$shares = 0;
203	}
204
205	return array(
206	'id' => get_rest_url_by_path( sprintf( 'posts/%d/shares', $wp_object->ID ) ),
207	'type' => 'Collection',
208	'totalItems' => $shares,
209	);
210	}
211
212	/**
213	* Retrieves the schema for the Replies endpoint.
214	*
215	* @return array Schema data.
216	*/
217	public function get_item_schema() {
218	if ( $this->schema ) {
219	return $this->add_additional_fields_schema( $this->schema );
220	}
221
222	$schema = array(
223	'$schema' => 'http://json-schema.org/draft-04/schema#',
224	'title' => 'replies',
225	'type' => 'object',
226	'properties' => array(
227	'@context' => array(
228	'type' => 'array',
229	'items' => array(
230	'type' => 'string',
231	),
232	'required' => true,
233	),
234	'id' => array(
235	'type' => 'string',
236	'format' => 'uri',
237	'required' => true,
238	),
239	'type' => array(
240	'type' => 'string',
241	'enum' => array( 'Collection', 'OrderedCollection', 'CollectionPage', 'OrderedCollectionPage' ),
242	'required' => true,
243	),
244	'first' => array(
245	'type' => 'string',
246	'format' => 'uri',
247	),
248	'last' => array(
249	'type' => 'string',
250	'format' => 'uri',
251	),
252	'items' => array(
253	'type' => 'array',
254	'items' => array(
255	'type' => 'object',
256	),
257	),
258	),
259	);
260
261	$this->schema = $schema;
262
263	return $this->add_additional_fields_schema( $this->schema );
264	}
265	}
266