activitypub / includes / rest / class-actor-autocomplete-controller.php

class-actor-autocomplete-controller.php in ActivityPub 9.2.2, at includes/rest/class-actor-autocomplete-controller.php

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1	<?php
2	/**
3	* Actor_Autocomplete_Controller file.
4	*
5	* @package Activitypub
6	*/
7
8	namespace Activitypub\Rest;
9
10	use Activitypub\Activity\Base_Object;
11	use Activitypub\Collection\Actors;
12	use Activitypub\Collection\Remote_Actors;
13
14	use function Activitypub\get_masked_wp_version;
15	use function Activitypub\get_rest_url_by_path;
16
17	/**
18	* ActivityPub Actor Autocomplete Controller.
19	*
20	* Implements the SWICG ActivityPub API actor autocomplete extension: a typeahead search over the
21	* actors this server knows (its own local actors and the remote actors it has cached), returning an
22	* ActivityStreams Collection of actor objects.
23	*
24	* @see https://swicg.github.io/activitypub-api/autocomplete
25	*/
26	class Actor_Autocomplete_Controller extends \WP_REST_Controller {
27	use Verification;
28
29	/**
30	* The JSON-LD context for the actor autocomplete extension.
31	*
32	* @var string
33	*/
34	const CONTEXT = 'https://swicg.github.io/activitypub-api/autocomplete';
35
36	/**
37	* The namespace of this controller's route.
38	*
39	* @var string
40	*/
41	protected $namespace = ACTIVITYPUB_REST_NAMESPACE;
42
43	/**
44	* The base of this controller's route.
45	*
46	* @var string
47	*/
48	protected $rest_base = 'actors/autocomplete';
49
50	/**
51	* Register routes.
52	*/
53	public function register_routes() {
54	\register_rest_route(
55	$this->namespace,
56	'/' . $this->rest_base,
57	array(
58	array(
59	'methods' => \WP_REST_Server::READABLE,
60	'callback' => array( $this, 'get_items' ),
61	'permission_callback' => array( $this, 'verify_authentication' ),
62	'args' => array(
63	'q' => array(
64	'description' => 'The text typed so far.',
65	'type' => 'string',
66	'required' => true,
67	'sanitize_callback' => 'sanitize_text_field',
68	),
69	),
70	),
71	)
72	);
73	}
74
75	/**
76	* Search actors matching the query.
77	*
78	* @param \WP_REST_Request $request Full details about the request.
79	* @return \WP_REST_Response\|\WP_Error Collection of actor objects, or WP_Error on failure.
80	*/
81	public function get_items( $request ) {
82	$query = \trim( (string) $request->get_param( 'q' ) );
83
84	/**
85	* Filters the minimum number of characters required before actors are searched.
86	*
87	* @param int $min_length The minimum query length. Default 2.
88	*/
89	$min_length = (int) \apply_filters( 'activitypub_actor_autocomplete_min_length', 2 );
90
91	if ( \mb_strlen( $query ) < $min_length ) {
92	return new \WP_Error(
93	'activitypub_query_too_short',
94	\sprintf(
95	/* translators: %d: minimum number of characters */
96	\__( 'The search query must be at least %d characters long.', 'activitypub' ),
97	$min_length
98	),
99	array( 'status' => 400 )
100	);
101	}
102
103	/**
104	* Filters the maximum number of actors returned by the autocomplete endpoint.
105	*
106	* @param int $number The maximum number of actors. Default 10.
107	* @param \WP_REST_Request $request The request object.
108	*/
109	$number = \max( 1, (int) \apply_filters( 'activitypub_actor_autocomplete_number', 10, $request ) );
110
111	$items = array();
112	$seen = array();
113
114	foreach ( Actors::search( $query, $number ) as $actor ) {
115	$items[] = $actor->to_array( false );
116	$seen[ $actor->get_id() ] = true;
117	}
118
119	// Only look up as many remote actors as are still needed to fill the result set.
120	$remaining = $number - \count( $items );
121
122	if ( $remaining > 0 ) {
123	foreach ( Remote_Actors::search( $query, $remaining ) as $post ) {
124	$actor = Remote_Actors::get_actor( $post );
125	if ( \is_wp_error( $actor ) \|\| isset( $seen[ $actor->get_id() ] ) ) {
126	continue;
127	}
128	$items[] = $actor->to_array( false );
129	$seen[ $actor->get_id() ] = true;
130	}
131	}
132
133	$response = array(
134	// JSON_LD_CONTEXT is already a context array, so merge the extension IRI in rather than nesting it.
135	'@context' => \array_merge( (array) Base_Object::JSON_LD_CONTEXT, array( self::CONTEXT ) ),
136	'id' => \add_query_arg( 'q', $query, get_rest_url_by_path( $this->rest_base ) ),
137	'generator' => 'https://wordpress.org/?v=' . get_masked_wp_version(),
138	'type' => 'Collection',
139	'totalItems' => \count( $items ),
140	'items' => $items,
141	);
142
143	$response = \rest_ensure_response( $response );
144	$response->header( 'Content-Type', 'application/activity+json; charset=' . \get_option( 'blog_charset' ) );
145
146	return $response;
147	}
148	}
149