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<?php
/**
* Replies_Controller file.
*
* @package Activitypub
*/
namespace Activitypub\Rest;
use Activitypub\Activity\Base_Object;
use Activitypub\Collection\Interactions;
use Activitypub\Collection\Replies;
use function Activitypub\get_rest_url_by_path;
use function Activitypub\is_post_publicly_queryable;
/**
* ActivityPub Replies_Controller class.
*/
class Replies_Controller extends \WP_REST_Controller {
/**
* The namespace of this controller's route.
*
* @var string
*/
protected $namespace = ACTIVITYPUB_REST_NAMESPACE;
/**
* The base of this controller's route.
*
* @var string
*/
protected $rest_base = '(?P<object_type>[\w\-\.]+)s/(?P<id>[\d]+)/(?P<type>[\w\-\.]+)';
/**
* Register routes.
*/
public function register_routes() {
\register_rest_route(
$this->namespace,
'/' . $this->rest_base,
array(
'args' => array(
'object_type' => array(
'description' => 'The type of object to get replies for.',
'type' => 'string',
'enum' => array( 'post', 'comment' ),
'required' => true,
),
'id' => array(
'description' => 'The ID of the object.',
'type' => 'integer',
'minimum' => 1,
'required' => true,
),
'type' => array(
'description' => 'The type of collection to query.',
'type' => 'string',
'enum' => array( 'replies', 'likes', 'shares' ),
'required' => true,
),
),
array(
'methods' => \WP_REST_Server::READABLE,
'callback' => array( $this, 'get_items' ),
'permission_callback' => '__return_true',
'args' => array(
'page' => array(
'description' => 'Current page of the collection.',
'type' => 'integer',
'minimum' => 1,
// No default so we can differentiate between Collection and CollectionPage requests.
),
),
),
'schema' => array( $this, 'get_item_schema' ),
)
);
}
/**
* Retrieves a collection of replies.
*
* @param \WP_REST_Request $request The request object.
*
* @return \WP_REST_Response|\WP_Error Response object or WP_Error object.
*/
public function get_items( $request ) {
$object_type = $request->get_param( 'object_type' );
$id = (int) $request->get_param( 'id' );
if ( 'comment' === $object_type ) {
$wp_object = \get_comment( $id );
/*
* A comment inherits the visibility of its parent post. Reject
* collections for comments whose parent post is not currently
* publicly queryable, so we don't leak metadata for private,
* draft, password-protected, or local-only posts — including
* posts that were once federated and have since been made
* non-public.
*/
$publicly_queryable = $wp_object && is_post_publicly_queryable( $wp_object->comment_post_ID );
} else {
$wp_object = \get_post( $id );
$publicly_queryable = $wp_object && is_post_publicly_queryable( $wp_object );
}
if ( ! $publicly_queryable ) {
return new \WP_Error(
'activitypub_replies_collection_does_not_exist',
\sprintf(
// translators: %s: The type (post, comment, etc.) for which no replies collection exists.
\__( 'No reply collection exists for the type %s.', 'activitypub' ),
$object_type
),
array( 'status' => 404 )
);
}
switch ( $request->get_param( 'type' ) ) {
case 'replies':
$response = $this->get_replies( $request, $wp_object );
break;
case 'likes':
$response = $this->get_likes( $request, $wp_object );
break;
case 'shares':
$response = $this->get_shares( $request, $wp_object );
break;
default:
$response = new \WP_Error( 'rest_unknown_collection_type', 'Unknown collection type.', array( 'status' => 404 ) );
}
// Prepend ActivityPub Context.
$response = \array_merge( array( '@context' => Base_Object::JSON_LD_CONTEXT ), $response );
$response = \rest_ensure_response( $response );
$response->header( 'Content-Type', 'application/activity+json; charset=' . \get_option( 'blog_charset' ) );
return $response;
}
/**
* Retrieves a collection of replies.
*
* @param \WP_REST_Request $request The request object.
* @param \WP_Post|\WP_Comment $wp_object The WordPress object.
*
* @return array Response collection of replies.
*/
public function get_replies( $request, $wp_object ) {
$page = $request->get_param( 'page' );
// If the request parameter page is present get the CollectionPage otherwise the Replies collection.
if ( null === $page ) {
$response = Replies::get_collection( $wp_object );
} else {
$response = Replies::get_collection_page( $wp_object, $page );
}
return $response;
}
/**
* Retrieves a collection of likes.
*
* @param \WP_REST_Request $request The request object.
* @param \WP_Post|\WP_Comment $wp_object The WordPress object.
*
* @return array Response collection of likes.
*/
public function get_likes( $request, $wp_object ) {
if ( $wp_object instanceof \WP_Post ) {
$likes = Interactions::count_by_type( $wp_object->ID, 'like' );
} else {
$likes = 0;
}
return array(
'id' => get_rest_url_by_path( \sprintf( 'posts/%d/likes', $wp_object->ID ) ),
'type' => 'Collection',
'totalItems' => $likes,
);
}
/**
* Retrieves a collection of shares.
*
* @param \WP_REST_Request $request The request object.
* @param \WP_Post|\WP_Comment $wp_object The WordPress object.
*
* @return array Response collection of shares.
*/
public function get_shares( $request, $wp_object ) {
if ( $wp_object instanceof \WP_Post ) {
$shares = Interactions::count_by_type( $wp_object->ID, 'repost' ) + Interactions::count_by_type( $wp_object->ID, 'quote' );
} else {
$shares = 0;
}
return array(
'id' => get_rest_url_by_path( \sprintf( 'posts/%d/shares', $wp_object->ID ) ),
'type' => 'Collection',
'totalItems' => $shares,
);
}
/**
* Retrieves the schema for the Replies endpoint.
*
* @return array Schema data.
*/
public function get_item_schema() {
if ( $this->schema ) {
return $this->add_additional_fields_schema( $this->schema );
}
$schema = array(
'$schema' => 'http://json-schema.org/draft-04/schema#',
'title' => 'replies',
'type' => 'object',
'properties' => array(
'@context' => array(
'type' => 'array',
'items' => array(
'type' => 'string',
),
'required' => true,
),
'id' => array(
'type' => 'string',
'format' => 'uri',
'required' => true,
),
'type' => array(
'type' => 'string',
'enum' => array( 'Collection', 'OrderedCollection', 'CollectionPage', 'OrderedCollectionPage' ),
'required' => true,
),
'first' => array(
'type' => 'string',
'format' => 'uri',
),
'last' => array(
'type' => 'string',
'format' => 'uri',
),
'items' => array(
'type' => 'array',
'items' => array(
'type' => 'object',
),
),
),
);
$this->schema = $schema;
return $this->add_additional_fields_schema( $this->schema );
}
}