<?php
/**
* REST API functions.
*
* @package WordPress
* @subpackage REST_API
* @since 4.4.0
*/

/**
* Version number for our API.
*
* @var string
*/
define( 'REST_API_VERSION', '2.0' );

/**
* Registers a REST API route.
*
* Note: Do not use before the {@see 'rest_api_init'} hook.
*
* @since 4.4.0
* @since 5.1.0 Added a `_doing_it_wrong()` notice when not called on or after the `rest_api_init` hook.
* @since 5.5.0 Added a `_doing_it_wrong()` notice when the required `permission_callback` argument is not set.
*
* @param string $route_namespace The first URL segment after core prefix. Should be unique to your package/plugin.
* @param string $route The base URL for route you are adding.
* @param array $args Optional. Either an array of options for the endpoint, or an array of arrays for
* multiple methods. Default empty array.
* @param bool $override Optional. If the route already exists, should we override it? True overrides,
* false merges (with newer overriding if duplicate keys exist). Default false.
* @return bool True on success, false on error.
*/
function register_rest_route( $route_namespace, $route, $args = array(), $override = false ) {
if ( empty( $route_namespace ) ) {
/*
* Non-namespaced routes are not allowed, with the exception of the main
* and namespace indexes. If you really need to register a
* non-namespaced route, call `WP_REST_Server::register_route` directly.
*/
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: string value of the namespace, 2: string value of the route. */
__( 'Routes must be namespaced with plugin or theme name and version. Instead there seems to be an empty namespace \'%1$s\' for route \'%2$s\'.' ),
'<code>' . $route_namespace . '</code>',
'<code>' . $route . '</code>'
),
'4.4.0'
);
return false;
} elseif ( empty( $route ) ) {
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: string value of the namespace, 2: string value of the route. */
__( 'Route must be specified. Instead within the namespace \'%1$s\', there seems to be an empty route \'%2$s\'.' ),
'<code>' . $route_namespace . '</code>',
'<code>' . $route . '</code>'
),
'4.4.0'
);
return false;
}

$clean_namespace = trim( $route_namespace, '/' );

if ( $clean_namespace !== $route_namespace ) {
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: string value of the namespace, 2: string value of the route. */
__( 'Namespace must not start or end with a slash. Instead namespace \'%1$s\' for route \'%2$s\' seems to contain a slash.' ),
'<code>' . $route_namespace . '</code>',
'<code>' . $route . '</code>'
),
'5.4.2'
);
}

if ( ! did_action( 'rest_api_init' ) ) {
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: rest_api_init, 2: string value of the route, 3: string value of the namespace. */
__( 'REST API routes must be registered on the %1$s action. Instead route \'%2$s\' with namespace \'%3$s\' was not registered on this action.' ),
'<code>rest_api_init</code>',
'<code>' . $route . '</code>',
'<code>' . $route_namespace . '</code>'
),
'5.1.0'
);
}

if ( isset( $args['args'] ) ) {
$common_args = $args['args'];
unset( $args['args'] );
} else {
$common_args = array();
}

if ( isset( $args['callback'] ) ) {
// Upgrade a single set to multiple.
$args = array( $args );
}

$defaults = array(
'methods' => 'GET',
'callback' => null,
'args' => array(),
);

foreach ( $args as $key => &$arg_group ) {
if ( ! is_numeric( $key ) ) {
// Route option, skip here.
continue;
}

$arg_group = array_merge( $defaults, $arg_group );
$arg_group['args'] = array_merge( $common_args, $arg_group['args'] );

if ( ! isset( $arg_group['permission_callback'] ) ) {
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: The REST API route being registered, 2: The argument name, 3: The suggested function name. */
__( 'The REST API route definition for %1$s is missing the required %2$s argument. For REST API routes that are intended to be public, use %3$s as the permission callback.' ),
'<code>' . $clean_namespace . '/' . trim( $route, '/' ) . '</code>',
'<code>permission_callback</code>',
'<code>__return_true</code>'
),
'5.5.0'
);
}

foreach ( $arg_group['args'] as $arg ) {
if ( ! is_array( $arg ) ) {
_doing_it_wrong(
__FUNCTION__,
sprintf(
/* translators: 1: $args, 2: The REST API route being registered. */
__( 'REST API %1$s should be an array of arrays. Non-array value detected for %2$s.' ),
'<code>$args</code>',
'<code>' . $clean_namespace . '/' . trim( $route, '/' ) . '</code>'
),
'6.1.0'
);
break; // Leave the foreach loop once a non-array argument was found.
}
}
}

$full_route = '/' . $clean_namespace . '/' . trim( $route, '/' );
rest_get_server()->register_route( $clean_namespace, $full_route, $args, $override );
return true;
}

/**
* Registers a new field on an existing WordPress object type.
*
* @since 4.7.0
*
* @global array $wp_rest_additional_fields Holds registered fields, organized
* by object type.
*
* @param string|array $object_type Object(s) the field is being registered to,
* "post"|"term"|"comment" etc.
* @param string $attribute The attribute name.
* @param array $args {
* Optional. An array of arguments used to handle the registered field.
*
* @type callable|null $get_callback Optional. The callback function used to retrieve the field value. Default is
* 'null', the field will not be returned in the response. The function will
* be passed the prepared object data.
* @type callable|null $update_callback Optional. The callback function used to set and update the field value. Default
* is 'null', the value cannot be set or updated. The function will be passed
* the model object, like WP_Post.
* @type array|null $schema Optional. The schema for this field.
* Default is 'null', no schema entry will be returned.
* }
*/
function register_rest_field( $object_type, $attribute, $args = array() ) {
global $wp_rest_additional_fields;

$defaults = array(
'get_callback' => null,
'update_callback' => null,
'schema' => null,
);

$args = wp_parse_args( $args, $defaults );

$object_types = (array) $object_type;

foreach ( $object_types as $object_type ) {
$wp_rest_additional_fields[ $object_type ][ $attribute ] = $args;
}
}

/**
* Registers rewrite rules for the REST API.
*
* @since 4.4.0
*
* @see rest_api_register_rewrites()
* @global WP $wp Current WordPress environment instance.
*/
function rest_api_init() {
rest_api_register_rewrites();

global $wp;
$wp->add_query_var( 'rest_route' );
}

/**
* Adds REST rewrite rules.
*
* @since 4.4.0
*
* @see add_rewrite_rule()
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
*/
function rest_api_register_rewrites() {
global $wp_rewrite;

add_rewrite_rule( '^' . rest_get_url_prefix() . '/?$', 'index.php?rest_route=/', 'top' );
add_rewrite_rule( '^' . rest_get_url_prefix() . '/(.*)?', 'index.php?rest_route=/$matches[1]', 'top' );
add_rewrite_rule( '^' . $wp_rewrite->index . '/' . rest_get_url_prefix() . '/?$', 'index.php?rest_route=/', 'top' );
add_rewrite_rule( '^' . $wp_rewrite->index . '/' . rest_get_url_prefix() . '/(.*)?', 'index.php?rest_route=/$matches[1]', 'top' );
}

/**
* Registers the default REST API filters.
*
* Attached to the {@see 'rest_api_init'} action
* to make testing and disabling these filters easier.
*
* @since 4.4.0
*/
function rest_api_default_filters() {
if ( wp_is_serving_rest_request() ) {
// Deprecated reporting.
add_action( 'deprecated_function_run', 'rest_handle_deprecated_function', 10, 3 );
add_filter( 'deprecated_function_trigger_error', '__return_false' );
add_action( 'deprecated_argument_run', 'rest_handle_deprecated_argument', 10, 3 );
add_filter( 'deprecated_argument_trigger_error', '__return_false' );
add_action( 'doing_it_wrong_run', 'rest_handle_doing_it_wrong', 10, 3 );
add_filter( 'doing_it_wrong_trigger_error', '__return_false' );
}

// Default serving.
add_filter( 'rest_pre_serve_request', 'rest_send_cors_headers' );
add_filter( 'rest_post_dispatch', 'rest_send_allow_header', 10, 3 );
add_filter( 'rest_post_dispatch', 'rest_filter_response_fields', 10, 3 );

add_filter( 'rest_pre_dispatch', 'rest_handle_options_request', 10, 3 );
add_filter( 'rest_index', 'rest_add_application_passwords_to_index' );
}

/**
* Registers default REST API routes.
*
* @since 4.7.0
*/
function create_initial_rest_routes() {
foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) {
$controller = $post_type->get_rest_controller();

if ( ! $controller ) {
continue;
}

if ( ! $post_type->late_route_registration ) {
$controller->register_routes();
}

$revisions_controller = $post_type->get_revisions_rest_controller();
if ( $revisions_controller ) {
$revisions_controller->register_routes();
}

$autosaves_controller = $post_type->get_autosave_rest_controller();
if ( $autosaves_controller ) {
$autosaves_controller->register_routes();
}

if ( $post_type->late_route_registration ) {
$controller->register_routes();
}
}

// Post types.
$controller = new WP_REST_Post_Types_Controller();
$controller->register_routes();

// Post statuses.
$controller = new WP_REST_Post_Statuses_Controller();
$controller->register_routes();

// Taxonomies.
$controller = new WP_REST_Taxonomies_Controller();
$controller->register_routes();

// Terms.
foreach ( get_taxonomies( array( 'show_in_rest' => true ), 'object' ) as $taxonomy ) {
$controller = $taxonomy->get_rest_controller();

if ( ! $controller ) {
continue;
}

$controller->register_routes();
}

// Users.
$controller = new WP_REST_Users_Controller();
$controller->register_routes();

// Application Passwords
$controller = new WP_REST_Application_Passwords_Controller();
$controller->register_routes();

// Comments.
$controller = new WP_REST_Comments_Controller();
$controller->register_routes();

$search_handlers = array(
new WP_REST_Post_Search_Handler(),
new WP_REST_Term_Search_Handler(),
new WP_REST_Post_Format_Search_Handler(),
);

/**
* Filters the search handlers to use in the REST search controller.
*
* @since 5.0.0
*
* @param array $search_handlers List of search handlers to use in the controller. Each search
* handler instance must extend the `WP_REST_Search_Handler` class.
* Default is only a handler for posts.
*/
$search_handlers = apply_filters( 'wp_rest_search_handlers', $search_handlers );

$controller = new WP_REST_Search_Controller( $search_handlers );
$controller->register_routes();

// Block Renderer.
$controller = new WP_REST_Block_Renderer_Controller();
$controller->register_routes();

// Block Types.
$controller = new WP_REST_Block_Types_Controller();
$controller->register_routes();

// Settings.
$controller = new WP_REST_Settings_Controller();
$controller->register_routes();

// Themes.
$controller = new WP_REST_Themes_Controller();
$controller->register_routes();

// Plugins.
$controller = new WP_REST_Plugins_Controller();
$controller->register_routes();

// Sidebars.
$controller = new WP_REST_Sidebars_Controller();
$controller->register_routes();

// Widget Types.
$controller = new WP_REST_Widget_Types_Controller();
$controller->register_routes();

// Widgets.
$controller = new WP_REST_Widgets_Controller();
$controller->register_routes();

// Block Directory.
$controller = new WP_REST_Block_Directory_Controller();
$controller->register_routes();

// Pattern Directory.
$controller = new WP_REST_Pattern_Directory_Controller();
$controller->register_routes();

// Block Patterns.
$controller = new WP_REST_Block_Patterns_Controller();
$controller->register_routes();

// Block Pattern Categories.
$controller = new WP_REST_Block_Pattern_Categories_Controller();
$controller->register_routes();

// Site Health.
$site_health = WP_Site_Health::get_instance();
$controller = new WP_REST_Site_Health_Controller( $site_health );
$controller->register_routes();

// URL Details.
$controller = new WP_REST_URL_Details_Controller();
$controller->register_routes();

// Menu Locations.
$controller = new WP_REST_Menu_Locations_Controller();
$controller->register_routes();

// Site Editor Export.
$controller = new WP_REST_Edit_Site_Export_Controller();
$controller->register_routes();

// Navigation Fallback.
$controller = new WP_REST_Navigation_Fallback_Controller();
$controller->register_routes();

// Font Collections.
$font_collections_controller = new WP_REST_Font_Collections_Controller();
$font_collections_controller->register_routes();
}

/**
* Loads the REST API.
*
* @since 4.4.0
*
* @global WP $wp Current WordPress environment instance.
*/
function rest_api_loaded() {
if ( empty( $GLOBALS['wp']->query_vars['rest_route'] ) ) {
return;
}

/**
* Whether this is a REST Request.
*
* @since 4.4.0
* @var bool
*/
define( 'REST_REQUEST', true );

// Initialize the server.
$server = rest_get_server();

// Fire off the request.
$route = untrailingslashit( $GLOBALS['wp']->query_vars['rest_route'] );
if ( empty( $route ) ) {
$route = '/';
}
$server->serve_request( $route );

// We're done.
die();
}

/**
* Retrieves the URL prefix for any API resource.
*
* @since 4.4.0
*
* @return string Prefix.
*/
function rest_get_url_prefix() {
/**
* Filters the REST URL prefix.
*
* @since 4.4.0
*
* @param string $prefix URL prefix. Default 'wp-json'.
*/
return apply_filters( 'rest_url_prefix', 'wp-json' );
}

/**
* Retrieves the URL to a REST endpoint on a site.
*
* Note: The returned URL is NOT escaped.
*
* @since 4.4.0
*
* @todo Check if this is even necessary
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
*
* @param int|null $blog_id Optional. Blog ID. Default of null returns URL for current blog.
* @param string $path Optional. REST route. Default '/'.
* @param string $scheme Optional. Sanitization scheme. Default 'rest'.
* @return string Full URL to the endpoint.
*/
function get_rest_url( $blog_id = null, $path = '/', $scheme = 'rest' ) {
if ( empty( $path ) ) {
$path = '/';
}

$path = '/' . ltrim( $path, '/' );

if ( is_multisite() && get_blog_option( $blog_id, 'permalink_structure' ) || get_option( 'permalink_structure' ) ) {
global $wp_rewrite;

if ( $wp_rewrite->using_index_permalinks() ) {
$url = get_home_url( $blog_id, $wp_rewrite->index . '/' . rest_get_url_prefix(), $scheme );
} else {
$url = get_home_url( $blog_id, rest_get_url_prefix(), $scheme );
}

$url .= $path;
} else {
$url = trailingslashit( get_home_url( $blog_id, '', $scheme ) );
/*
* nginx only allows HTTP/1.0 methods when redirecting from / to /index.php.
* To work around this, we manually add index.php to the URL, avoiding the redirect.
*/
if ( ! str_ends_with( $url, 'index.php' ) ) {
$url .= 'index.php';
}

$url = add_query_arg( 'rest_route', $path, $url );
}

if ( is_ssl() && isset( $_SERVER['SERVER_NAME'] ) ) {
// If the current host is the same as the REST URL host, force the REST URL scheme to HTTPS.
if ( parse_url( get_home_url( $blog_id ), PHP_URL_HOST ) === $_SERVER['SERVER_NAME'] ) {
$url = set_url_scheme( $url, 'https' );
}
}

if ( is_admin() && force_ssl_admin() ) {
/*
* In this situation the home URL may be http:, and `is_ssl()` may be false,
* but the admin is served over https: (one way or another), so REST API usage
* will be blocked by browsers unless it is also served over HTTPS.
*/
$url = set_url_scheme( $url, 'https' );
}

/**
* Filters the REST URL.
*
* Use this filter to adjust the url returned by the get_rest_url() function.
*
* @since 4.4.0
*
* @param string $url REST URL.
* @param string $path REST route.
* @param int|null $blog_id Blog ID.
* @param string $scheme Sanitization scheme.
*/
return apply_filters( 'rest_url', $url, $path, $blog_id, $scheme );
}

/**
* Retrieves the URL to a REST endpoint.
*
* Note: The returned URL is NOT escaped.
*
* @since 4.4.0
*
* @param string $path Optional. REST route. Default empty.
* @param string $scheme Optional. Sanitization scheme. Default 'rest'.
* @return string Full URL to the endpoint.
*/
function rest_url( $path = '', $scheme = 'rest' ) {
return get_rest_url( null, $path, $scheme );
}

/**
* Do a REST request.
*
* Used primarily to route internal requests through WP_REST_Server.
*
* @since 4.4.0
*
* @param WP_REST_Request|string $request Request.
* @return WP_REST_Response REST response.
*/
function rest_do_request( $request ) {
$request = rest_ensure_request( $request );
return rest_get_server()->dispatch( $request );
}

/**
* Retrieves the current REST server instance.
*
* Instantiates a new instance if none exists already.
*
* @since 4.5.0
*
* @global WP_REST_Server $wp_rest_server REST server instance.
*
* @return WP_REST_Server REST server instance.
*/
function rest_get_server() {
/* @var WP_REST_Server $wp_rest_server */
global $wp_rest_server;

if ( empty( $wp_rest_server ) ) {
/**
* Filters the REST Server Class.
*
* This filter allows you to adjust the server class used by the REST API, using a
* different class to handle requests.
*
* @since 4.4.0
*
* @param string $class_name The name of the server class. Default 'WP_REST_Server'.
*/
$wp_rest_server_class = apply_filters( 'wp_rest_server_class', 'WP_REST_Server' );
$wp_rest_server = new $wp_rest_server_class();

/**
* Fires when preparing to serve a REST API request.
*
* Endpoint objects should be created and register their hooks on this action rather
* than another action to ensure they're only loaded when needed.
*
* @since 4.4.0
*
* @param WP_REST_Server $wp_rest_server Server object.
*/
do_action( 'rest_api_init', $wp_rest_server );
}

return $wp_rest_server;
}

/**
* Ensures request arguments are a request object (for consistency).
*
* @since 4.4.0
* @since 5.3.0 Accept string argument for the request path.
*
* @param array|string|WP_REST_Request $request Request to check.
* @return WP_REST_Request REST request instance.
*/
function rest_ensure_request( $request ) {
if ( $request instanceof WP_REST_Request ) {
return $request;
}

if ( is_string( $request ) ) {
return new WP_REST_Request( 'GET', $request );
}

return new WP_REST_Request( 'GET', '', $request );
}

/**
* Ensures a REST response is a response object (for consistency).
*
* This implements WP_REST_Response, allowing usage of `set_status`/`header`/etc
* without needing to double-check the object. Will also allow WP_Error to indicate error
* responses, so users should immediately check for this value.
*
* @since 4.4.0
*
* @param WP_REST_Response|WP_Error|WP_HTTP_Response|mixed $response Response to check.
* @return WP_REST_Response|WP_Error If response generated an error, WP_Error, if response
* is already an instance, WP_REST_Response, otherwise
* returns a new WP_REST_Response instance.
*/
function rest_ensure_response( $response ) {
if ( is_wp_error( $response ) ) {
return $response;
}

if ( $response instanceof WP_REST_Response ) {
return $response;
}

/*
* While WP_HTTP_Response is the base class of WP_REST_Response, it doesn't provide
* all the required methods used in WP_REST_Server::dispatch().
*/
if ( $response instanceof WP_HTTP_Response ) {
return new WP_REST_Response(
$response->get_data(),
$response->get_status(),
$response->get_headers()
);
}

return new WP_REST_Response( $response );
}

/**
* Handles _deprecated_function() errors.
*
* @since 4.4.0
*
* @param string $function_name The function that was called.
* @param string $replacement The function that should have been called.
* @param string $version Version.
*/
function rest_handle_deprecated_function( $function_name, $replacement, $version ) {
if ( ! WP_DEBUG || headers_sent() ) {
return;
}
if ( ! empty( $replacement ) ) {
/* translators: 1: Function name, 2: WordPress version number, 3: New function name. */
$string = sprintf( __( '%1$s (since %2$s; use %3$s instead)' ), $function_name, $version, $replacement );
} else {
/* translators: 1: Function name, 2: WordPress version number. */
$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function_name, $version );
}

header( sprintf( 'X-WP-DeprecatedFunction: %s', $string ) );
}

/**
* Handles _deprecated_argument() errors.
*
* @since 4.4.0
*
* @param string $function_name The function that was called.
* @param string $message A message regarding the change.
* @param string $version Version.
*/
function rest_handle_deprecated_argument( $function_name, $message, $version ) {
if ( ! WP_DEBUG || headers_sent() ) {
return;
}
if ( $message ) {
/* translators: 1: Function name, 2: WordPress version number, 3: Error message. */
$string = sprintf( __( '%1$s (since %2$s; %3$s)' ), $function_name, $version, $message );
} else {
/* translators: 1: Function name, 2: WordPress version number. */
$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function_name, $version );
}

header( sprintf( 'X-WP-DeprecatedParam: %s', $string ) );
}

/**
* Handles _doing_it_wrong errors.
*
* @since 5.5.0
*
* @param string $function_name The function that was called.
* @param string $message A message explaining what has been done incorrectly.
* @param string|null $version The version of WordPress where the message was added.
*/
function rest_handle_doing_it_wrong( $function_name, $message, $version ) {
if ( ! WP_DEBUG || headers_sent() ) {
return;
}

if ( $version ) {
/* translators: Developer debugging message. 1: PHP function name, 2: WordPress version number, 3: Explanatory message. */
$string = __( '%1$s (since %2$s; %3$s)' );
$string = sprintf( $string, $function_name, $version, $message );
} else {
/* translators: Developer debugging message. 1: PHP function name, 2: Explanatory message. */
$string = __( '%1$s (%2$s)' );
$string = sprintf( $string, $function_name, $message );
}

header( sprintf( 'X-WP-DoingItWrong: %s', $string ) );
}

/**
* Sends Cross-Origin Resource Sharing headers with API requests.
*
* @since 4.4.0
*
* @param mixed $value Response data.
* @return mixed Response data.
*/
function rest_send_cors_headers( $value ) {
$origin = get_http_origin();

if ( $origin ) {
// Requests from file:// and data: URLs send "Origin: null".
if ( 'null' !== $origin ) {
$origin = sanitize_url( $origin );
}
header( 'Access-Control-Allow-Origin: ' . $origin );
header( 'Access-Control-Allow-Methods: OPTIONS, GET, POST, PUT, PATCH, DELETE' );
header( 'Access-Control-Allow-Credentials: true' );
header( 'Vary: Origin', false );
} elseif ( ! headers_sent() && 'GET' === $_SERVER['REQUEST_METHOD'] && ! is_user_logged_in() ) {
header( 'Vary: Origin', false );
}

return $value;
}

/**
* Handles OPTIONS requests for the server.
*
* This is handled outside of the server code, as it doesn't obey normal route
* mapping.
*
* @since 4.4.0
*
* @param mixed $response Current response, either response or `null` to indicate pass-through.
* @param WP_REST_Server $handler ResponseHandler instance (usually WP_REST_Server).
* @param WP_REST_Request $request The request that was used to make current response.
* @return WP_REST_Response Modified response, either response or `null` to indicate pass-through.
*/
function rest_handle_options_request( $response, $handler, $request ) {
if ( ! empty( $response ) || $request->get_method() !== 'OPTIONS' ) {
return $response;
}

$response = new WP_REST_Response();
$data = array();

foreach ( $handler->get_routes() as $route => $endpoints ) {
$match = preg_match( '@^' . $route . '$@i', $request->get_route(), $matches );

if ( ! $match ) {
continue;
}

$args = array();
foreach ( $matches as $param => $value ) {
if ( ! is_int( $param ) ) {
$args[ $param ] = $value;
}
}

foreach ( $endpoints as $endpoint ) {
// Remove the redundant preg_match() argument.
unset( $args[0] );

$request->set_url_params( $args );
$request->set_attributes( $endpoint );
}

$data = $handler->get_data_for_route( $route, $endpoints, 'help' );
$response->set_matched_route( $route );
break;
}

$response->set_data( $data );
return $response;
}

/**
* Sends the "Allow" header to state all methods that can be sent to the current route.
*
* @since 4.4.0
*
* @param WP_REST_Response $response Current response being served.
* @param WP_REST_Server $server ResponseHandler instance (usually WP_REST_Server).
* @param WP_REST_Request $request The request that was used to make current response.
* @return WP_REST_Response Response to be served, with "Allow" header if route has allowed methods.
*/
function rest_send_allow_header( $response, $server, $request ) {
$matched_route = $response->get_matched_route();

if ( ! $matched_route ) {
return $response;
}

$routes = $server->get_routes();

$allowed_methods = array();

// Get the allowed methods across the routes.
foreach ( $routes[ $matched_route ] as $_handler ) {
foreach ( $_handler['methods'] as $handler_method => $value ) {

if ( ! empty( $_handler['permission_callback'] ) ) {

$permission = call_user_func( $_handler['permission_callback'], $request );

$allowed_methods[ $handler_method ] = true === $permission;
} else {
$allowed_methods[ $handler_method ] = true;
}
}
}

// Strip out all the methods that are not allowed (false values).
$allowed_methods = array_filter( $allowed_methods );

if ( $allowed_methods ) {
$response->header( 'Allow', implode( ', ', array_map( 'strtoupper', array_keys( $allowed_methods ) ) ) );
}

return $response;
}

/**
* Recursively computes the intersection of arrays using keys for comparison.
*
* @since 5.3.0
*
* @param array $array1 The array with master keys to check.
* @param array $array2 An array to compare keys against.
* @return array An associative array containing all the entries of array1 which have keys
* that are present in all arguments.
*/
function _rest_array_intersect_key_recursive( $array1, $array2 ) {
$array1 = array_intersect_key( $array1, $array2 );
foreach ( $array1 as $key => $value ) {
if ( is_array( $value ) && is_array( $array2[ $key ] ) ) {
$array1[ $key ] = _rest_array_intersect_key_recursive( $value, $array2[ $key ] );
}
}
return $array1;
}

/**
* Filters the REST API response to include only an allow-listed set of response object fields.
*
* @since 4.8.0
*
* @param WP_REST_Response $response Current response being served.
* @param WP_REST_Server $server ResponseHandler instance (usually WP_REST_Server).
* @param WP_REST_Request $request The request that was used to make current response.
* @return WP_REST_Response Response to be served, trimmed down to contain a subset of fields.
*/
function rest_filter_response_fields( $response, $server, $request ) {
if ( ! isset( $request['_fields'] ) || $response->is_error() ) {
return $response;
}

$data = $response->get_data();

$fields = wp_parse_list( $request['_fields'] );

if ( 0 === count( $fields ) ) {
return $response;
}

// Trim off outside whitespace from the comma delimited list.
$fields = array_map( 'trim', $fields );

// Create nested array of accepted field hierarchy.
$fields_as_keyed = array();
foreach ( $fields as $field ) {
$parts = explode( '.', $field );
$ref = &$fields_as_keyed;
while ( count( $parts ) > 1 ) {
$next = array_shift( $parts );
if ( isset( $ref[ $next ] ) && true === $ref[ $next ] ) {
// Skip any sub-properties if their parent prop is already marked for inclusion.
break 2;
}
$ref[ $next ] = isset( $ref[ $next ] ) ? $ref[ $next ] : array();
$ref = &$ref[ $next ];
}
$last = array_shift( $parts );
$ref[ $last ] = true;
}

if ( wp_is_numeric_array( $data ) ) {
$new_data = array();
foreach ( $data as $item ) {
$new_data[] = _rest_array_intersect_key_recursive( $item, $fields_as_keyed );
}
} else {
$new_data = _rest_array_intersect_key_recursive( $data, $fields_as_keyed );
}

$response->set_data( $new_data );

return $response;
}

/**
* Given an array of fields to include in a response, some of which may be
* `nested.fields`, determine whether the provided field should be included
* in the response body.
*
* If a parent field is passed in, the presence of any nested field within
* that parent will cause the method to return `true`. For example "title"
* will return true if any of `title`, `title.raw` or `title.rendered` is
* provided.
*
* @since 5.3.0
*
* @param string $field A field to test for inclusion in the response body.
* @param array $fields An array of string fields supported by the endpoint.
* @return bool Whether to include the field or not.
*/
function rest_is_field_included( $field, $fields ) {
if ( in_array( $field, $fields, true ) ) {
return true;
}

foreach ( $fields as $accepted_field ) {
/*
* Check to see if $field is the parent of any item in $fields.
* A field "parent" should be accepted if "parent.child" is accepted.
*/
if ( str_starts_with( $accepted_field, "$field." ) ) {
return true;
}
/*
* Conversely, if "parent" is accepted, all "parent.child" fields
* should also be accepted.
*/
if ( str_starts_with( $field, "$accepted_field." ) ) {
return true;
}
}

return false;
}

/**
* Adds the REST API URL to the WP RSD endpoint.
*
* @since 4.4.0
*
* @see get_rest_url()
*/
function rest_output_rsd() {
$api_root = get_rest_url();

if ( empty( $api_root ) ) {
return;
}
?>
<api name="WP-API" blogID="1" preferred="false" apiLink="<?php echo esc_url( $api_root ); ?>" />
<?php
}

/**
* Outputs the REST API link tag into page header.
*
* @since 4.4.0
*
* @see get_rest_url()
*/
function rest_output_link_wp_head() {
$api_root = get_rest_url();

if ( empty( $api_root ) ) {
return;
}

printf( '<link rel="https://api.w.org/" href="%s" />', esc_url( $api_root ) );

$resource = rest_get_queried_resource_route();

if ( $resource ) {
printf(
'<link rel="alternate" title="%1$s" type="application/json" href="%2$s" />',
_x( 'JSON', 'REST API resource link name' ),
esc_url( rest_url( $resource ) )
);
}
}

/**
* Sends a Link header for the REST API.
*
* @since 4.4.0
*/
function rest_output_link_header() {
if ( headers_sent() ) {
return;
}

$api_root = get_rest_url();

if ( empty( $api_root ) ) {
return;
}

header( sprintf( 'Link: <%s>; rel="https://api.w.org/"', sanitize_url( $api_root ) ), false );

$resource = rest_get_queried_resource_route();

if ( $resource ) {
header(
sprintf(
'Link: <%1$s>; rel="alternate"; title="%2$s"; type="application/json"',
sanitize_url( rest_url( $resource ) ),
_x( 'JSON', 'REST API resource link name' )
),
false
);
}
}

/**
* Checks for errors when using cookie-based authentication.
*
* WordPress' built-in cookie authentication is always active
* for logged in users. However, the API has to check nonces
* for each request to ensure users are not vulnerable to CSRF.
*
* @since 4.4.0
*
* @global mixed $wp_rest_auth_cookie
*
* @param WP_Error|mixed $result Error from another authentication handler,
* null if we should handle it, or another value if not.
* @return WP_Error|mixed|bool WP_Error if the cookie is invalid, the $result, otherwise true.
*/
function rest_cookie_check_errors( $result ) {
if ( ! empty( $result ) ) {
return $result;
}

global $wp_rest_auth_cookie;

/*
* Is cookie authentication being used? (If we get an auth
* error, but we're still logged in, another authentication
* must have been used).
*/
if ( true !== $wp_rest_auth_cookie && is_user_logged_in() ) {
return $result;
}

// Determine if there is a nonce.
$nonce = null;

if ( isset( $_REQUEST['_wpnonce'] ) ) {
$nonce = $_REQUEST['_wpnonce'];
} elseif ( isset( $_SERVER['HTTP_X_WP_NONCE'] ) ) {
$nonce = $_SERVER['HTTP_X_WP_NONCE'];
}

if ( null === $nonce ) {
// No nonce at all, so act as if it's an unauthenticated request.
wp_set_current_user( 0 );
return true;
}

// Check the nonce.
$result = wp_verify_nonce( $nonce, 'wp_rest' );

if ( ! $result ) {
add_filter( 'rest_send_nocache_headers', '__return_true', 20 );
return new WP_Error( 'rest_cookie_invalid_nonce', __( 'Cookie check failed' ), array( 'status' => 403 ) );
}

// Send a refreshed nonce in header.
rest_get_server()->send_header( 'X-WP-Nonce', wp_create_nonce( 'wp_rest' ) );

return true;
}

/**
* Collects cookie authentication status.
*
* Collects errors from wp_validate_auth_cookie for use by rest_cookie_check_errors.
*
* @since 4.4.0
*
* @see current_action()
* @global mixed $wp_rest_auth_cookie
*/
function rest_cookie_collect_status() {
global $wp_rest_auth_cookie;

$status_type = current_action();

if ( 'auth_cookie_valid' !== $status_type ) {
$wp_rest_auth_cookie = substr( $status_type, 12 );
return;
}

$wp_rest_auth_cookie = true;
}

/**
* Collects the status of authenticating with an application password.
*
* @since 5.6.0
* @since 5.7.0 Added the `$app_password` parameter.
*
* @global WP_User|WP_Error|null $wp_rest_application_password_status
* @global string|null $wp_rest_application_password_uuid
*
* @param WP_Error $user_or_error The authenticated user or error instance.
* @param array $app_password The Application Password used to authenticate.
*/
function rest_application_password_collect_status( $user_or_error, $app_password = array() ) {
global $wp_rest_application_password_status, $wp_rest_application_password_uuid;

$wp_rest_application_password_status = $user_or_error;

if ( empty( $app_password['uuid'] ) ) {
$wp_rest_application_password_uuid = null;
} else {
$wp_rest_application_password_uuid = $app_password['uuid'];
}
}

/**
* Gets the Application Password used for authenticating the request.
*
* @since 5.7.0
*
* @global string|null $wp_rest_application_password_uuid
*
* @return string|null The Application Password UUID, or null if Application Passwords was not used.
*/
function rest_get_authenticated_app_password() {
global $wp_rest_application_password_uuid;

return $wp_rest_application_password_uuid;
}

/**
* Checks for errors when using application password-based authentication.
*
* @since 5.6.0
*
* @global WP_User|WP_Error|null $wp_rest_application_password_status
*
* @param WP_Error|null|true $result Error from another authentication handler,
* null if we should handle it, or another value if not.
* @return WP_Error|null|true WP_Error if the application password is invalid, the $result, otherwise true.
*/
function rest_application_password_check_errors( $result ) {
global $wp_rest_application_password_status;

if ( ! empty( $result ) ) {
return $result;
}

if ( is_wp_error( $wp_rest_application_password_status ) ) {
$data = $wp_rest_application_password_status->get_error_data();

if ( ! isset( $data['status'] ) ) {
$data['status'] = 401;
}

$wp_rest_application_password_status->add_data( $data );

return $wp_rest_application_password_status;
}

if ( $wp_rest_application_password_status instanceof WP_User ) {
return true;
}

return $result;
}

/**
* Adds Application Passwords info to the REST API index.
*
* @since 5.6.0
*
* @param WP_REST_Response $response The index response object.
* @return WP_REST_Response
*/
function rest_add_application_passwords_to_index( $response ) {
if ( ! wp_is_application_passwords_available() ) {
return $response;
}

$response->data['authentication']['application-passwords'] = array(
'endpoints' => array(
'authorization' => admin_url( 'authorize-application.php' ),
),
);

return $response;
}

/**
* Retrieves the avatar URLs in various sizes.
*
* @since 4.7.0
*
* @see get_avatar_url()
*
* @param mixed $id_or_email The avatar to retrieve a URL for. Accepts a user ID, Gravatar MD5 hash,
* user email, WP_User object, WP_Post object, or WP_Comment object.
* @return (string|false)[] Avatar URLs keyed by size. Each value can be a URL string or boolean false.
*/
function rest_get_avatar_urls( $id_or_email ) {
$avatar_sizes = rest_get_avatar_sizes();

$urls = array();
foreach ( $avatar_sizes as $size ) {
$urls[ $size ] = get_avatar_url( $id_or_email, array( 'size' => $size ) );
}

return $urls;
}

/**
* Retrieves the pixel sizes for avatars.
*
* @since 4.7.0
*
* @return int[] List of pixel sizes for avatars. Default `[ 24, 48, 96 ]`.
*/
function rest_get_avatar_sizes() {
/**
* Filters the REST avatar sizes.
*
* Use this filter to adjust the array of sizes returned by the
* `rest_get_avatar_sizes` function.
*
* @since 4.4.0
*
* @param int[] $sizes An array of int values that are the pixel sizes for avatars.
* Default `[ 24, 48, 96 ]`.
*/
return apply_filters( 'rest_avatar_sizes', array( 24, 48, 96 ) );
}

/**
* Parses an RFC3339 time into a Unix timestamp.
*
* Explicitly check for `false` to detect failure, as zero is a valid return
* value on success.
*
* @since 4.4.0
*
* @param string $date RFC3339 timestamp.
* @param bool $force_utc Optional. Whether to force UTC timezone instead of using
* the timestamp's timezone. Default false.
* @return int|false Unix timestamp on success, false on failure.
*/
function rest_parse_date( $date, $force_utc = false ) {
if ( $force_utc ) {
$date = preg_replace( '/[+-]\d+:?\d+$/', '+00:00', $date );
}

$regex = '#^\d{4}-\d{2}-\d{2}[Tt ]\d{2}:\d{2}:\d{2}(?:\.\d+)?(?:Z|[+-]\d{2}(?::\d{2})?)?$#';

if ( ! preg_match( $regex, $date, $matches ) ) {
return false;
}

return strtotime( $date );
}

/**
* Parses a 3 or 6 digit hex color (with #).
*
* @since 5.4.0
*
* @param string $color 3 or 6 digit hex color (with #).
* @return string|false Color value on success, false on failure.
*/
function rest_parse_hex_color( $color ) {
$regex = '|^#([A-Fa-f0-9]{3}){1,2}$|';
if ( ! preg_match( $regex, $color, $matches ) ) {
return false;
}

return $color;
}

/**
* Parses a date into both its local and UTC equivalent, in MySQL datetime format.
*
* @since 4.4.0
*
* @see rest_parse_date()
*
* @param string $date RFC3339 timestamp.
* @param bool $is_utc Whether the provided date should be interpreted as UTC. Default false.
* @return array|null {
* Local and UTC datetime strings, in MySQL datetime format (Y-m-d H:i:s),
* null on failure.
*
* @type string $0 Local datetime string.
* @type string $1 UTC datetime string.
* }
*/
function rest_get_date_with_gmt( $date, $is_utc = false ) {
/*
* Whether or not the original date actually has a timezone string
* changes the way we need to do timezone conversion.
* Store this info before parsing the date, and use it later.
*/
$has_timezone = preg_match( '#(Z|[+-]\d{2}(:\d{2})?)$#', $date );

$date = rest_parse_date( $date );

if ( false === $date ) {
return null;
}

/*
* At this point $date could either be a local date (if we were passed
* a *local* date without a timezone offset) or a UTC date (otherwise).
* Timezone conversion needs to be handled differently between these two cases.
*/
if ( ! $is_utc && ! $has_timezone ) {
$local = gmdate( 'Y-m-d H:i:s', $date );
$utc = get_gmt_from_date( $local );
} else {
$utc = gmdate( 'Y-m-d H:i:s', $date );
$local = get_date_from_gmt( $utc );
}

return array( $local, $utc );
}

/**
* Returns a contextual HTTP error code for authorization failure.
*
* @since 4.7.0
*
* @return int 401 if the user is not logged in, 403 if the user is logged in.
*/
function rest_authorization_required_code() {
return is_user_logged_in() ? 403 : 401;
}

/**
* Validate a request argument based on details registered to the route.
*
* @since 4.7.0
*
* @param mixed $value
* @param WP_REST_Request $request
* @param string $param
* @return true|WP_Error
*/
function rest_validate_request_arg( $value, $request, $param ) {
$attributes = $request->get_attributes();
if ( ! isset( $attributes['args'][ $param ] ) || ! is_array( $attributes['args'][ $param ] ) ) {
return true;
}
$args = $attributes['args'][ $param ];

return rest_validate_value_from_schema( $value, $args, $param );
}

/**
* Sanitize a request argument based on details registered to the route.
*
* @since 4.7.0
*
* @param mixed $value
* @param WP_REST_Request $request
* @param string $param
* @return mixed
*/
function rest_sanitize_request_arg( $value, $request, $param ) {
$attributes = $request->get_attributes();
if ( ! isset( $attributes['args'][ $param ] ) || ! is_array( $attributes['args'][ $param ] ) ) {
return $value;
}
$args = $attributes['args'][ $param ];

return rest_sanitize_value_from_schema( $value, $args, $param );
}

/**
* Parse a request argument based on details registered to the route.
*
* Runs a validation check and sanitizes the value, primarily to be used via
* the `sanitize_callback` arguments in the endpoint args registration.
*
* @since 4.7.0
*
* @param mixed $value
* @param WP_REST_Request $request
* @param string $param
* @return mixed
*/
function rest_parse_request_arg( $value, $request, $param ) {
$is_valid = rest_validate_request_arg( $value, $request, $param );

if ( is_wp_error( $is_valid ) ) {
return $is_valid;
}

$value = rest_sanitize_request_arg( $value, $request, $param );

return $value;
}

/**
* Determines if an IP address is valid.
*
* Handles both IPv4 and IPv6 addresses.
*
* @since 4.7.0
*
* @param string $ip IP address.
* @return string|false The valid IP address, otherwise false.
*/
function rest_is_ip_address( $ip ) {
$ipv4_pattern = '/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/';

if ( ! preg_match( $ipv4_pattern, $ip ) && ! WpOrg\Requests\Ipv6::check_ipv6( $ip ) ) {
return false;
}

return $ip;
}

/**
* Changes a boolean-like value into the proper boolean value.
*
* @since 4.7.0
*
* @param bool|string|int $value The value being evaluated.
* @return bool Returns the proper associated boolean value.
*/
function rest_sanitize_boolean( $value ) {
// String values are translated to `true`; make sure 'false' is false.
if ( is_string( $value ) ) {
$value = strtolower( $value );
if ( in_array( $value, array( 'false', '0' ), true ) ) {
$value = false;
}
}

// Everything else will map nicely to boolean.
return (bool) $value;
}

/**
* Determines if a given value is boolean-like.
*
* @since 4.7.0
*
* @param bool|string $maybe_bool The value being evaluated.
* @return bool True if a boolean, otherwise false.
*/
function rest_is_boolean( $maybe_bool ) {
if ( is_bool( $maybe_bool ) ) {
return true;
}

if ( is_string( $maybe_bool ) ) {
$maybe_bool = strtolower( $maybe_bool );

$valid_boolean_values = array(
'false',
'true',
'0',
'1',
);

return in_array( $maybe_bool, $valid_boolean_values, true );
}

if ( is_int( $maybe_bool ) ) {
return in_array( $maybe_bool, array( 0, 1 ), true );
}

return false;
}

/**
* Determines if a given value is integer-like.
*
* @since 5.5.0
*
* @param mixed $maybe_integer The value being evaluated.
* @return bool True if an integer, otherwise false.
*/
function rest_is_integer( $maybe_integer ) {
return is_numeric( $maybe_integer ) && round( (float) $maybe_integer ) === (float) $maybe_integer;
}

/**
* Determines if a given value is array-like.
*
* @since 5.5.0
*
* @param mixed $maybe_array The value being evaluated.
* @return bool
*/
function rest_is_array( $maybe_array ) {
if ( is_scalar( $maybe_array ) ) {
$maybe_array = wp_parse_list( $maybe_array );
}

return wp_is_numeric_array( $maybe_array );
}

/**
* Converts an array-like value to an array.
*
* @since 5.5.0
*
* @param mixed $maybe_array The value being evaluated.
* @return array Returns the array extracted from the value.
*/
function rest_sanitize_array( $maybe_array ) {
if ( is_scalar( $maybe_array ) ) {
return wp_parse_list( $maybe_array );
}

if ( ! is_array( $maybe_array ) ) {
return array();
}

// Normalize to numeric array so nothing unexpected is in the keys.
return array_values( $maybe_array );
}

/**
* Determines if a given value is object-like.
*
* @since 5.5.0
*
* @param mixed $maybe_object The value being evaluated.
* @return bool True if object like, otherwise false.
*/
function rest_is_object( $maybe_object ) {
if ( '' === $maybe_object ) {
return true;
}

if ( $maybe_object instanceof stdClass ) {
return true;
}

if ( $maybe_object instanceof JsonSerializable ) {
$maybe_object = $maybe_object->jsonSerialize();
}

return is_array( $maybe_object );
}

/**
* Converts an object-like value to an array.
*
* @since 5.5.0
*
* @param mixed $maybe_object The value being evaluated.
* @return array Returns the object extracted from the value as an associative array.
*/
function rest_sanitize_object( $maybe_object ) {
if ( '' === $maybe_object ) {
return array();
}

if ( $maybe_object instanceof stdClass ) {
return (array) $maybe_object;
}

if ( $maybe_object instanceof JsonSerializable ) {
$maybe_object = $maybe_object->jsonSerialize();
}

if ( ! is_array( $maybe_object ) ) {
return array();
}

return $maybe_object;
}

/**
* Gets the best type for a value.
*
* @since 5.5.0
*
* @param mixed $value The value to check.
* @param string[] $types The list of possible types.
* @return string The best matching type, an empty string if no types match.
*/
function rest_get_best_type_for_value( $value, $types ) {
static $checks = array(
'array' => 'rest_is_array',
'object' => 'rest_is_object',
'integer' => 'rest_is_integer',
'number' => 'is_numeric',
'boolean' => 'rest_is_boolean',
'string' => 'is_string',
'null' => 'is_null',
);

/*
* Both arrays and objects allow empty strings to be converted to their types.
* But the best answer for this type is a string.
*/
if ( '' === $value && in_array( 'string', $types, true ) ) {
return 'string';
}

foreach ( $types as $type ) {
if ( isset( $checks[ $type ] ) && $checks[ $type ]( $value ) ) {
return $type;
}
}

return '';
}

/**
* Handles getting the best type for a multi-type schema.
*
* This is a wrapper for {@see rest_get_best_type_for_value()} that handles
* backward compatibility for schemas that use invalid types.
*
* @since 5.5.0
*
* @param mixed $value The value to check.
* @param array $args The schema array to use.
* @param string $param The parameter name, used in error messages.
* @return string
*/
function rest_handle_multi_type_schema( $value, $args, $param = '' ) {
$allowed_types = array( 'array', 'object', 'string', 'number', 'integer', 'boolean', 'null' );
$invalid_types = array_diff( $args['type'], $allowed_types );

if ( $invalid_types ) {
_doing_it_wrong(
__FUNCTION__,
/* translators: 1: Parameter, 2: List of allowed types. */
wp_sprintf( __( 'The "type" schema keyword for %1$s can only contain the built-in types: %2$l.' ), $param, $allowed_types ),
'5.5.0'
);
}

$best_type = rest_get_best_type_for_value( $value, $args['type'] );

if ( ! $best_type ) {
if ( ! $invalid_types ) {
return '';
}

// Backward compatibility for previous behavior which allowed the value if there was an invalid type used.
$best_type = reset( $invalid_types );
}

return $best_type;
}

/**
* Checks if an array is made up of unique items.
*
* @since 5.5.0
*
* @param array $input_array The array to check.
* @return bool True if the array contains unique items, false otherwise.
*/
function rest_validate_array_contains_unique_items( $input_array ) {
$seen = array();

foreach ( $input_array as $item ) {
$stabilized = rest_stabilize_value( $item );
$key = serialize( $stabilized );

if ( ! isset( $seen[ $key ] ) ) {
$seen[ $key ] = true;

continue;
}

return false;
}

return true;
}

/**
* Stabilizes a value following JSON Schema semantics.
*
* For lists, order is preserved. For objects, properties are reordered alphabetically.
*
* @since 5.5.0
*
* @param mixed $value The value to stabilize. Must already be sanitized. Objects should have been converted to arrays.
* @return mixed The stabilized value.
*/
function rest_stabilize_value( $value ) {
if ( is_scalar( $value ) || is_null( $value ) ) {
return $value;
}

if ( is_object( $value ) ) {
_doing_it_wrong( __FUNCTION__, __( 'Cannot stabilize objects. Convert the object to an array first.' ), '5.5.0' );

return $value;
}

ksort( $value );

foreach ( $value as $k => $v ) {
$value[ $k ] = rest_stabilize_value( $v );
}

return $value;
}

/**
* Validates if the JSON Schema pattern matches a value.
*
* @since 5.6.0
*
* @param string $pattern The pattern to match against.
* @param string $value The value to check.
* @return bool True if the pattern matches the given value, false otherwise.
*/
function rest_validate_json_schema_pattern( $pattern, $value ) {
$escaped_pattern = str_replace( '#', '\\#', $pattern );

return 1 === preg_match( '#' . $escaped_pattern . '#u', $value );
}

/**
* Finds the schema for a property using the patternProperties keyword.
*
* @since 5.6.0
*
* @param string $property The property name to check.
* @param array $args The schema array to use.
* @return array|null The schema of matching pattern property, or null if no patterns match.
*/
function rest_find_matching_pattern_property_schema( $property, $args ) {
if ( isset( $args['patternProperties'] ) ) {
foreach ( $args['patternProperties'] as $pattern => $child_schema ) {
if ( rest_validate_json_schema_pattern( $pattern, $property ) ) {
return $child_schema;
}
}
}

return null;
}

/**
* Formats a combining operation error into a WP_Error object.
*
* @since 5.6.0
*
* @param string $param The parameter name.
* @param array $error The error details.
* @return WP_Error
*/
function rest_format_combining_operation_error( $param, $error ) {
$position = $error['index'];
$reason = $error['error_object']->get_error_message();

if ( isset( $error['schema']['title'] ) ) {
$title = $error['schema']['title'];

return new WP_Error(
'rest_no_matching_schema',
/* translators: 1: Parameter, 2: Schema title, 3: Reason. */
sprintf( __( '%1$s is not a valid %2$s. Reason: %3$s' ), $param, $title, $reason ),
array( 'position' => $position )
);
}

return new WP_Error(
'rest_no_matching_schema',
/* translators: 1: Parameter, 2: Reason. */
sprintf( __( '%1$s does not match the expected format. Reason: %2$s' ), $param, $reason ),
array( 'position' => $position )
);
}

/**
* Gets the error of combining operation.
*
* @since 5.6.0
*
* @param array $value The value to validate.
* @param string $param The parameter name, used in error messages.
* @param array $errors The errors array, to search for possible error.
* @return WP_Error The combining operation error.
*/
function rest_get_combining_operation_error( $value, $param, $errors ) {
// If there is only one error, simply return it.
if ( 1 === count( $errors ) ) {
return rest_format_combining_operation_error( $param, $errors[0] );
}

// Filter out all errors related to type validation.
$filtered_errors = array();
foreach ( $errors as $error ) {
$error_code = $error['error_object']->get_error_code();
$error_data = $error['error_object']->get_error_data();

if ( 'rest_invalid_type' !== $error_code || ( isset( $error_data['param'] ) && $param !== $error_data['param'] ) ) {
$filtered_errors[] = $error;
}
}

// If there is only one error left, simply return it.
if ( 1 === count( $filtered_errors ) ) {
return rest_format_combining_operation_error( $param, $filtered_errors[0] );
}

// If there are only errors related to object validation, try choosing the most appropriate one.
if ( count( $filtered_errors ) > 1 && 'object' === $filtered_errors[0]['schema']['type'] ) {
$result = null;
$number = 0;

foreach ( $filtered_errors as $error ) {
if ( isset( $error['schema']['properties'] ) ) {
$n = count( array_intersect_key( $error['schema']['properties'], $value ) );
if ( $n > $number ) {
$result = $error;
$number = $n;
}
}
}

if ( null !== $result ) {
return rest_format_combining_operation_error( $param, $result );
}
}

// If each schema has a title, include those titles in the error message.
$schema_titles = array();
foreach ( $errors as $error ) {
if ( isset( $error['schema']['title'] ) ) {
$schema_titles[] = $error['schema']['title'];
}
}

if ( count( $schema_titles ) === count( $errors ) ) {
/* translators: 1: Parameter, 2: Schema titles. */
return new WP_Error( 'rest_no_matching_schema', wp_sprintf( __( '%1$s is not a valid %2$l.' ), $param, $schema_titles ) );
}

/* translators: %s: Parameter. */
return new WP_Error( 'rest_no_matching_schema', sprintf( __( '%s does not match any of the expected formats.' ), $param ) );
}

/**
* Finds the matching schema among the "anyOf" schemas.
*
* @since 5.6.0
*
* @param mixed $value The value to validate.
* @param array $args The schema array to use.
* @param string $param The parameter name, used in error messages.
* @return array|WP_Error The matching schema or WP_Error instance if all schemas do not match.
*/
function rest_find_any_matching_schema( $value, $args, $param ) {
$errors = array();

foreach ( $args['anyOf'] as $index => $schema ) {
if ( ! isset( $schema['type'] ) && isset( $args['type'] ) ) {
$schema['type'] = $args['type'];
}

$is_valid = rest_validate_value_from_schema( $value, $schema, $param );
if ( ! is_wp_error( $is_valid ) ) {
return $schema;
}

$errors[] = array(
'error_object' => $is_valid,
'schema' => $schema,
'index' => $index,
);
}

return rest_get_combining_operation_error( $value, $param, $errors );
}

/**
* Finds the matching schema among the "oneOf" schemas.
*
* @since 5.6.0
*
* @param mixed $value The value to validate.
* @param array $args The schema array to use.
* @param string $param The parameter name, used in error messages.
* @param bool $stop_after_first_match Optional. Whether the process should stop after the first successful match.
* @return array|WP_Error The matching schema or WP_Error instance if the number of matching schemas is not equal to one.
*/
function rest_find_one_matching_schema( $value, $args, $param, $stop_after_first_match = false ) {
$matching_schemas = array();
$errors = array();

foreach ( $args['oneOf'] as $index => $schema ) {
if ( ! isset( $schema['type'] ) && isset( $args['type'] ) ) {
$schema['type'] = $args['type'];
}

$is_valid = rest_validate_value_from_schema( $value, $schema, $param );
if ( ! is_wp_error( $is_valid ) ) {
if ( $stop_after_first_match ) {
return $schema;
}

$matching_schemas[] = array(
'schema_object' => $schema,
'index' => $index,
);
} else {
$errors[] = array(
'error_object' => $is_valid,
'schema' => $schema,
'index' => $index,
);
}
}

if ( ! $matching_schemas ) {
return rest_get_combining_operation_error( $value, $param, $errors );
}

if ( count( $matching_schemas ) > 1 ) {
$schema_positions = array();
$schema_titles = array();

foreach ( $matching_schemas as $schema ) {
$schema_positions[] = $schema['index'];

if ( isset( $schema['schema_object']['title'] ) ) {
$schema_titles[] = $schema['schema_object']['title'];
}
}

// If each schema has a title, include those titles in the error message.
if ( count( $schema_titles ) === count( $matching_schemas ) ) {
return new WP_Error(
'rest_one_of_multiple_matches',
/* translators: 1: Parameter, 2: Schema titles. */
wp_sprintf( __( '%1$s matches %2$l, but should match only one.' ), $param, $schema_titles ),
array( 'positions' => $schema_positions )
);
}

return new WP_Error(
'rest_one_of_multiple_matches',
/* translators: %s: Parameter. */
sprintf( __( '%s matches more than one of the expected formats.' ), $param ),
array( 'positions' => $schema_positions )
);
}

return $matching_schemas[0]['schema_object'];
}

/**
* Checks the equality of two values, following JSON Schema semantics.
*
* Property order is ignored for objects.
*
* Values must have been previously sanitized/coerced to their native types.
*
* @since 5.7.0
*
* @param mixed $value1 The first value to check.
* @param mixed $value2 The second value to check.
* @return bool True if the values are equal or false otherwise.
*/
function rest_are_values_equal( $value1, $value2 ) {
if ( is_array( $value1 ) && is_array( $value2 ) ) {
if ( count( $value1 ) !== count( $value2 ) ) {
return false;
}

foreach ( $value1 as $index => $value ) {
if ( ! array_key_exists( $index, $value2 ) || ! rest_are_values_equal( $value, $value2[ $index ] ) ) {
return false;
}
}

return true;
}

if ( is_int( $value1 ) && is_float( $value2 )
|| is_float( $value1 ) && is_int( $value2 )
) {
return (float) $value1 === (float) $value2;
}

return $value1 === $value2;
}

/**
* Validates that the given value is a member of the JSON Schema "enum".
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param array $args The schema array to use.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error True if the "enum" contains the value or a WP_Error instance otherwise.
*/
function rest_validate_enum( $value, $args, $param ) {
$sanitized_value = rest_sanitize_value_from_schema( $value, $args, $param );
if ( is_wp_error( $sanitized_value ) ) {
return $sanitized_value;
}

foreach ( $args['enum'] as $enum_value ) {
if ( rest_are_values_equal( $sanitized_value, $enum_value ) ) {
return true;
}
}

$encoded_enum_values = array();
foreach ( $args['enum'] as $enum_value ) {
$encoded_enum_values[] = is_scalar( $enum_value ) ? $enum_value : wp_json_encode( $enum_value );
}

if ( count( $encoded_enum_values ) === 1 ) {
/* translators: 1: Parameter, 2: Valid values. */
return new WP_Error( 'rest_not_in_enum', wp_sprintf( __( '%1$s is not %2$s.' ), $param, $encoded_enum_values[0] ) );
}

/* translators: 1: Parameter, 2: List of valid values. */
return new WP_Error( 'rest_not_in_enum', wp_sprintf( __( '%1$s is not one of %2$l.' ), $param, $encoded_enum_values ) );
}

/**
* Get all valid JSON schema properties.
*
* @since 5.6.0
*
* @return string[] All valid JSON schema properties.
*/
function rest_get_allowed_schema_keywords() {
return array(
'title',
'description',
'default',
'type',
'format',
'enum',
'items',
'properties',
'additionalProperties',
'patternProperties',
'minProperties',
'maxProperties',
'minimum',
'maximum',
'exclusiveMinimum',
'exclusiveMaximum',
'multipleOf',
'minLength',
'maxLength',
'pattern',
'minItems',
'maxItems',
'uniqueItems',
'anyOf',
'oneOf',
);
}

/**
* Validate a value based on a schema.
*
* @since 4.7.0
* @since 4.9.0 Support the "object" type.
* @since 5.2.0 Support validating "additionalProperties" against a schema.
* @since 5.3.0 Support multiple types.
* @since 5.4.0 Convert an empty string to an empty object.
* @since 5.5.0 Add the "uuid" and "hex-color" formats.
* Support the "minLength", "maxLength" and "pattern" keywords for strings.
* Support the "minItems", "maxItems" and "uniqueItems" keywords for arrays.
* Validate required properties.
* @since 5.6.0 Support the "minProperties" and "maxProperties" keywords for objects.
* Support the "multipleOf" keyword for numbers and integers.
* Support the "patternProperties" keyword for objects.
* Support the "anyOf" and "oneOf" keywords.
*
* @param mixed $value The value to validate.
* @param array $args Schema array to use for validation.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_value_from_schema( $value, $args, $param = '' ) {
if ( isset( $args['anyOf'] ) ) {
$matching_schema = rest_find_any_matching_schema( $value, $args, $param );
if ( is_wp_error( $matching_schema ) ) {
return $matching_schema;
}

if ( ! isset( $args['type'] ) && isset( $matching_schema['type'] ) ) {
$args['type'] = $matching_schema['type'];
}
}

if ( isset( $args['oneOf'] ) ) {
$matching_schema = rest_find_one_matching_schema( $value, $args, $param );
if ( is_wp_error( $matching_schema ) ) {
return $matching_schema;
}

if ( ! isset( $args['type'] ) && isset( $matching_schema['type'] ) ) {
$args['type'] = $matching_schema['type'];
}
}

$allowed_types = array( 'array', 'object', 'string', 'number', 'integer', 'boolean', 'null' );

if ( ! isset( $args['type'] ) ) {
/* translators: %s: Parameter. */
_doing_it_wrong( __FUNCTION__, sprintf( __( 'The "type" schema keyword for %s is required.' ), $param ), '5.5.0' );
}

if ( is_array( $args['type'] ) ) {
$best_type = rest_handle_multi_type_schema( $value, $args, $param );

if ( ! $best_type ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: List of types. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, implode( ',', $args['type'] ) ),
array( 'param' => $param )
);
}

$args['type'] = $best_type;
}

if ( ! in_array( $args['type'], $allowed_types, true ) ) {
_doing_it_wrong(
__FUNCTION__,
/* translators: 1: Parameter, 2: The list of allowed types. */
wp_sprintf( __( 'The "type" schema keyword for %1$s can only be one of the built-in types: %2$l.' ), $param, $allowed_types ),
'5.5.0'
);
}

switch ( $args['type'] ) {
case 'null':
$is_valid = rest_validate_null_value_from_schema( $value, $param );
break;
case 'boolean':
$is_valid = rest_validate_boolean_value_from_schema( $value, $param );
break;
case 'object':
$is_valid = rest_validate_object_value_from_schema( $value, $args, $param );
break;
case 'array':
$is_valid = rest_validate_array_value_from_schema( $value, $args, $param );
break;
case 'number':
$is_valid = rest_validate_number_value_from_schema( $value, $args, $param );
break;
case 'string':
$is_valid = rest_validate_string_value_from_schema( $value, $args, $param );
break;
case 'integer':
$is_valid = rest_validate_integer_value_from_schema( $value, $args, $param );
break;
default:
$is_valid = true;
break;
}

if ( is_wp_error( $is_valid ) ) {
return $is_valid;
}

if ( ! empty( $args['enum'] ) ) {
$enum_contains_value = rest_validate_enum( $value, $args, $param );
if ( is_wp_error( $enum_contains_value ) ) {
return $enum_contains_value;
}
}

/*
* The "format" keyword should only be applied to strings. However, for backward compatibility,
* we allow the "format" keyword if the type keyword was not specified, or was set to an invalid value.
*/
if ( isset( $args['format'] )
&& ( ! isset( $args['type'] ) || 'string' === $args['type'] || ! in_array( $args['type'], $allowed_types, true ) )
) {
switch ( $args['format'] ) {
case 'hex-color':
if ( ! rest_parse_hex_color( $value ) ) {
return new WP_Error( 'rest_invalid_hex_color', __( 'Invalid hex color.' ) );
}
break;

case 'date-time':
if ( false === rest_parse_date( $value ) ) {
return new WP_Error( 'rest_invalid_date', __( 'Invalid date.' ) );
}
break;

case 'email':
if ( ! is_email( $value ) ) {
return new WP_Error( 'rest_invalid_email', __( 'Invalid email address.' ) );
}
break;
case 'ip':
if ( ! rest_is_ip_address( $value ) ) {
/* translators: %s: IP address. */
return new WP_Error( 'rest_invalid_ip', sprintf( __( '%s is not a valid IP address.' ), $param ) );
}
break;
case 'uuid':
if ( ! wp_is_uuid( $value ) ) {
/* translators: %s: The name of a JSON field expecting a valid UUID. */
return new WP_Error( 'rest_invalid_uuid', sprintf( __( '%s is not a valid UUID.' ), $param ) );
}
break;
}
}

return true;
}

/**
* Validates a null value based on a schema.
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_null_value_from_schema( $value, $param ) {
if ( null !== $value ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: Type name. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, 'null' ),
array( 'param' => $param )
);
}

return true;
}

/**
* Validates a boolean value based on a schema.
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_boolean_value_from_schema( $value, $param ) {
if ( ! rest_is_boolean( $value ) ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: Type name. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, 'boolean' ),
array( 'param' => $param )
);
}

return true;
}

/**
* Validates an object value based on a schema.
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param array $args Schema array to use for validation.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_object_value_from_schema( $value, $args, $param ) {
if ( ! rest_is_object( $value ) ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: Type name. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, 'object' ),
array( 'param' => $param )
);
}

$value = rest_sanitize_object( $value );

if ( isset( $args['required'] ) && is_array( $args['required'] ) ) { // schema version 4
foreach ( $args['required'] as $name ) {
if ( ! array_key_exists( $name, $value ) ) {
return new WP_Error(
'rest_property_required',
/* translators: 1: Property of an object, 2: Parameter. */
sprintf( __( '%1$s is a required property of %2$s.' ), $name, $param )
);
}
}
} elseif ( isset( $args['properties'] ) ) { // schema version 3
foreach ( $args['properties'] as $name => $property ) {
if ( isset( $property['required'] ) && true === $property['required'] && ! array_key_exists( $name, $value ) ) {
return new WP_Error(
'rest_property_required',
/* translators: 1: Property of an object, 2: Parameter. */
sprintf( __( '%1$s is a required property of %2$s.' ), $name, $param )
);
}
}
}

foreach ( $value as $property => $v ) {
if ( isset( $args['properties'][ $property ] ) ) {
$is_valid = rest_validate_value_from_schema( $v, $args['properties'][ $property ], $param . '[' . $property . ']' );
if ( is_wp_error( $is_valid ) ) {
return $is_valid;
}
continue;
}

$pattern_property_schema = rest_find_matching_pattern_property_schema( $property, $args );
if ( null !== $pattern_property_schema ) {
$is_valid = rest_validate_value_from_schema( $v, $pattern_property_schema, $param . '[' . $property . ']' );
if ( is_wp_error( $is_valid ) ) {
return $is_valid;
}
continue;
}

if ( isset( $args['additionalProperties'] ) ) {
if ( false === $args['additionalProperties'] ) {
return new WP_Error(
'rest_additional_properties_forbidden',
/* translators: %s: Property of an object. */
sprintf( __( '%1$s is not a valid property of Object.' ), $property )
);
}

if ( is_array( $args['additionalProperties'] ) ) {
$is_valid = rest_validate_value_from_schema( $v, $args['additionalProperties'], $param . '[' . $property . ']' );
if ( is_wp_error( $is_valid ) ) {
return $is_valid;
}
}
}
}

if ( isset( $args['minProperties'] ) && count( $value ) < $args['minProperties'] ) {
return new WP_Error(
'rest_too_few_properties',
sprintf(
/* translators: 1: Parameter, 2: Number. */
_n(
'%1$s must contain at least %2$s property.',
'%1$s must contain at least %2$s properties.',
$args['minProperties']
),
$param,
number_format_i18n( $args['minProperties'] )
)
);
}

if ( isset( $args['maxProperties'] ) && count( $value ) > $args['maxProperties'] ) {
return new WP_Error(
'rest_too_many_properties',
sprintf(
/* translators: 1: Parameter, 2: Number. */
_n(
'%1$s must contain at most %2$s property.',
'%1$s must contain at most %2$s properties.',
$args['maxProperties']
),
$param,
number_format_i18n( $args['maxProperties'] )
)
);
}

return true;
}

/**
* Validates an array value based on a schema.
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param array $args Schema array to use for validation.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_array_value_from_schema( $value, $args, $param ) {
if ( ! rest_is_array( $value ) ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: Type name. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, 'array' ),
array( 'param' => $param )
);
}

$value = rest_sanitize_array( $value );

if ( isset( $args['items'] ) ) {
foreach ( $value as $index => $v ) {
$is_valid = rest_validate_value_from_schema( $v, $args['items'], $param . '[' . $index . ']' );
if ( is_wp_error( $is_valid ) ) {
return $is_valid;
}
}
}

if ( isset( $args['minItems'] ) && count( $value ) < $args['minItems'] ) {
return new WP_Error(
'rest_too_few_items',
sprintf(
/* translators: 1: Parameter, 2: Number. */
_n(
'%1$s must contain at least %2$s item.',
'%1$s must contain at least %2$s items.',
$args['minItems']
),
$param,
number_format_i18n( $args['minItems'] )
)
);
}

if ( isset( $args['maxItems'] ) && count( $value ) > $args['maxItems'] ) {
return new WP_Error(
'rest_too_many_items',
sprintf(
/* translators: 1: Parameter, 2: Number. */
_n(
'%1$s must contain at most %2$s item.',
'%1$s must contain at most %2$s items.',
$args['maxItems']
),
$param,
number_format_i18n( $args['maxItems'] )
)
);
}

if ( ! empty( $args['uniqueItems'] ) && ! rest_validate_array_contains_unique_items( $value ) ) {
/* translators: %s: Parameter. */
return new WP_Error( 'rest_duplicate_items', sprintf( __( '%s has duplicate items.' ), $param ) );
}

return true;
}

/**
* Validates a number value based on a schema.
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param array $args Schema array to use for validation.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_number_value_from_schema( $value, $args, $param ) {
if ( ! is_numeric( $value ) ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: Type name. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, $args['type'] ),
array( 'param' => $param )
);
}

if ( isset( $args['multipleOf'] ) && fmod( $value, $args['multipleOf'] ) !== 0.0 ) {
return new WP_Error(
'rest_invalid_multiple',
/* translators: 1: Parameter, 2: Multiplier. */
sprintf( __( '%1$s must be a multiple of %2$s.' ), $param, $args['multipleOf'] )
);
}

if ( isset( $args['minimum'] ) && ! isset( $args['maximum'] ) ) {
if ( ! empty( $args['exclusiveMinimum'] ) && $value <= $args['minimum'] ) {
return new WP_Error(
'rest_out_of_bounds',
/* translators: 1: Parameter, 2: Minimum number. */
sprintf( __( '%1$s must be greater than %2$d' ), $param, $args['minimum'] )
);
}

if ( empty( $args['exclusiveMinimum'] ) && $value < $args['minimum'] ) {
return new WP_Error(
'rest_out_of_bounds',
/* translators: 1: Parameter, 2: Minimum number. */
sprintf( __( '%1$s must be greater than or equal to %2$d' ), $param, $args['minimum'] )
);
}
}

if ( isset( $args['maximum'] ) && ! isset( $args['minimum'] ) ) {
if ( ! empty( $args['exclusiveMaximum'] ) && $value >= $args['maximum'] ) {
return new WP_Error(
'rest_out_of_bounds',
/* translators: 1: Parameter, 2: Maximum number. */
sprintf( __( '%1$s must be less than %2$d' ), $param, $args['maximum'] )
);
}

if ( empty( $args['exclusiveMaximum'] ) && $value > $args['maximum'] ) {
return new WP_Error(
'rest_out_of_bounds',
/* translators: 1: Parameter, 2: Maximum number. */
sprintf( __( '%1$s must be less than or equal to %2$d' ), $param, $args['maximum'] )
);
}
}

if ( isset( $args['minimum'], $args['maximum'] ) ) {
if ( ! empty( $args['exclusiveMinimum'] ) && ! empty( $args['exclusiveMaximum'] ) ) {
if ( $value >= $args['maximum'] || $value <= $args['minimum'] ) {
return new WP_Error(
'rest_out_of_bounds',
sprintf(
/* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
__( '%1$s must be between %2$d (exclusive) and %3$d (exclusive)' ),
$param,
$args['minimum'],
$args['maximum']
)
);
}
}

if ( ! empty( $args['exclusiveMinimum'] ) && empty( $args['exclusiveMaximum'] ) ) {
if ( $value > $args['maximum'] || $value <= $args['minimum'] ) {
return new WP_Error(
'rest_out_of_bounds',
sprintf(
/* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
__( '%1$s must be between %2$d (exclusive) and %3$d (inclusive)' ),
$param,
$args['minimum'],
$args['maximum']
)
);
}
}

if ( ! empty( $args['exclusiveMaximum'] ) && empty( $args['exclusiveMinimum'] ) ) {
if ( $value >= $args['maximum'] || $value < $args['minimum'] ) {
return new WP_Error(
'rest_out_of_bounds',
sprintf(
/* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
__( '%1$s must be between %2$d (inclusive) and %3$d (exclusive)' ),
$param,
$args['minimum'],
$args['maximum']
)
);
}
}

if ( empty( $args['exclusiveMinimum'] ) && empty( $args['exclusiveMaximum'] ) ) {
if ( $value > $args['maximum'] || $value < $args['minimum'] ) {
return new WP_Error(
'rest_out_of_bounds',
sprintf(
/* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
__( '%1$s must be between %2$d (inclusive) and %3$d (inclusive)' ),
$param,
$args['minimum'],
$args['maximum']
)
);
}
}
}

return true;
}

/**
* Validates a string value based on a schema.
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param array $args Schema array to use for validation.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_string_value_from_schema( $value, $args, $param ) {
if ( ! is_string( $value ) ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: Type name. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, 'string' ),
array( 'param' => $param )
);
}

if ( isset( $args['minLength'] ) && mb_strlen( $value ) < $args['minLength'] ) {
return new WP_Error(
'rest_too_short',
sprintf(
/* translators: 1: Parameter, 2: Number of characters. */
_n(
'%1$s must be at least %2$s character long.',
'%1$s must be at least %2$s characters long.',
$args['minLength']
),
$param,
number_format_i18n( $args['minLength'] )
)
);
}

if ( isset( $args['maxLength'] ) && mb_strlen( $value ) > $args['maxLength'] ) {
return new WP_Error(
'rest_too_long',
sprintf(
/* translators: 1: Parameter, 2: Number of characters. */
_n(
'%1$s must be at most %2$s character long.',
'%1$s must be at most %2$s characters long.',
$args['maxLength']
),
$param,
number_format_i18n( $args['maxLength'] )
)
);
}

if ( isset( $args['pattern'] ) && ! rest_validate_json_schema_pattern( $args['pattern'], $value ) ) {
return new WP_Error(
'rest_invalid_pattern',
/* translators: 1: Parameter, 2: Pattern. */
sprintf( __( '%1$s does not match pattern %2$s.' ), $param, $args['pattern'] )
);
}

return true;
}

/**
* Validates an integer value based on a schema.
*
* @since 5.7.0
*
* @param mixed $value The value to validate.
* @param array $args Schema array to use for validation.
* @param string $param The parameter name, used in error messages.
* @return true|WP_Error
*/
function rest_validate_integer_value_from_schema( $value, $args, $param ) {
$is_valid_number = rest_validate_number_value_from_schema( $value, $args, $param );
if ( is_wp_error( $is_valid_number ) ) {
return $is_valid_number;
}

if ( ! rest_is_integer( $value ) ) {
return new WP_Error(
'rest_invalid_type',
/* translators: 1: Parameter, 2: Type name. */
sprintf( __( '%1$s is not of type %2$s.' ), $param, 'integer' ),
array( 'param' => $param )
);
}

return true;
}

/**
* Sanitize a value based on a schema.
*
* @since 4.7.0
* @since 5.5.0 Added the `$param` parameter.
* @since 5.6.0 Support the "anyOf" and "oneOf" keywords.
* @since 5.9.0 Added `text-field` and `textarea-field` formats.
*
* @param mixed $value The value to sanitize.
* @param array $args Schema array to use for sanitization.
* @param string $param The parameter name, used in error messages.
* @return mixed|WP_Error The sanitized value or a WP_Error instance if the value cannot be safely sanitized.
*/
function rest_sanitize_value_from_schema( $value, $args, $param = '' ) {
if ( isset( $args['anyOf'] ) ) {
$matching_schema = rest_find_any_matching_schema( $value, $args, $param );
if ( is_wp_error( $matching_schema ) ) {
return $matching_schema;
}

if ( ! isset( $args['type'] ) ) {
$args['type'] = $matching_schema['type'];
}

$value = rest_sanitize_value_from_schema( $value, $matching_schema, $param );
}

if ( isset( $args['oneOf'] ) ) {
$matching_schema = rest_find_one_matching_schema( $value, $args, $param );
if ( is_wp_error( $matching_schema ) ) {
return $matching_schema;
}

if ( ! isset( $args['type'] ) ) {
$args['type'] = $matching_schema['type'];
}

$value = rest_sanitize_value_from_schema( $value, $matching_schema, $param );
}

$allowed_types = array( 'array', 'object', 'string', 'number', 'integer', 'boolean', 'null' );

if ( ! isset( $args['type'] ) ) {
/* translators: %s: Parameter. */
_doing_it_wrong( __FUNCTION__, sprintf( __( 'The "type" schema keyword for %s is required.' ), $param ), '5.5.0' );
}

if ( is_array( $args['type'] ) ) {
$best_type = rest_handle_multi_type_schema( $value, $args, $param );

if ( ! $best_type ) {
return null;
}

$args['type'] = $best_type;
}

if ( ! in_array( $args['type'], $allowed_types, true ) ) {
_doing_it_wrong(
__FUNCTION__,
/* translators: 1: Parameter, 2: The list of allowed types. */
wp_sprintf( __( 'The "type" schema keyword for %1$s can only be one of the built-in types: %2$l.' ), $param, $allowed_types ),
'5.5.0'
);
}

if ( 'array' === $args['type'] ) {
$value = rest_sanitize_array( $value );

if ( ! empty( $args['items'] ) ) {
foreach ( $value as $index => $v ) {
$value[ $index ] = rest_sanitize_value_from_schema( $v, $args['items'], $param . '[' . $index . ']' );
}
}

if ( ! empty( $args['uniqueItems'] ) && ! rest_validate_array_contains_unique_items( $value ) ) {
/* translators: %s: Parameter. */
return new WP_Error( 'rest_duplicate_items', sprintf( __( '%s has duplicate items.' ), $param ) );
}

return $value;
}

if ( 'object' === $args['type'] ) {
$value = rest_sanitize_object( $value );

foreach ( $value as $property => $v ) {
if ( isset( $args['properties'][ $property ] ) ) {
$value[ $property ] = rest_sanitize_value_from_schema( $v, $args['properties'][ $property ], $param . '[' . $property . ']' );
continue;
}

$pattern_property_schema = rest_find_matching_pattern_property_schema( $property, $args );
if ( null !== $pattern_property_schema ) {
$value[ $property ] = rest_sanitize_value_from_schema( $v, $pattern_property_schema, $param . '[' . $property . ']' );
continue;
}

if ( isset( $args['additionalProperties'] ) ) {
if ( false === $args['additionalProperties'] ) {
unset( $value[ $property ] );
} elseif ( is_array( $args['additionalProperties'] ) ) {
$value[ $property ] = rest_sanitize_value_from_schema( $v, $args['additionalProperties'], $param . '[' . $property . ']' );
}
}
}

return $value;
}

if ( 'null' === $args['type'] ) {
return null;
}

if ( 'integer' === $args['type'] ) {
return (int) $value;
}

if ( 'number' === $args['type'] ) {
return (float) $value;
}

if ( 'boolean' === $args['type'] ) {
return rest_sanitize_boolean( $value );
}

// This behavior matches rest_validate_value_from_schema().
if ( isset( $args['format'] )
&& ( ! isset( $args['type'] ) || 'string' === $args['type'] || ! in_array( $args['type'], $allowed_types, true ) )
) {
switch ( $args['format'] ) {
case 'hex-color':
return (string) sanitize_hex_color( $value );

case 'date-time':
return sanitize_text_field( $value );

case 'email':
// sanitize_email() validates, which would be unexpected.
return sanitize_text_field( $value );

case 'uri':
return sanitize_url( $value );

case 'ip':
return sanitize_text_field( $value );

case 'uuid':
return sanitize_text_field( $value );

case 'text-field':
return sanitize_text_field( $value );

case 'textarea-field':
return sanitize_textarea_field( $value );
}
}

if ( 'string' === $args['type'] ) {
return (string) $value;
}

return $value;
}

/**
* Append result of internal request to REST API for purpose of preloading data to be attached to a page.
* Expected to be called in the context of `array_reduce`.
*
* @since 5.0.0
*
* @param array $memo Reduce accumulator.
* @param string $path REST API path to preload.
* @return array Modified reduce accumulator.
*/
function rest_preload_api_request( $memo, $path ) {
/*
* array_reduce() doesn't support passing an array in PHP 5.2,
* so we need to make sure we start with one.
*/
if ( ! is_array( $memo ) ) {
$memo = array();
}

if ( empty( $path ) ) {
return $memo;
}

$method = 'GET';
if ( is_array( $path ) && 2 === count( $path ) ) {
$method = end( $path );
$path = reset( $path );

if ( ! in_array( $method, array( 'GET', 'OPTIONS' ), true ) ) {
$method = 'GET';
}
}

$path = untrailingslashit( $path );
if ( empty( $path ) ) {
$path = '/';
}

$path_parts = parse_url( $path );
if ( false === $path_parts ) {
return $memo;
}

$request = new WP_REST_Request( $method, $path_parts['path'] );
if ( ! empty( $path_parts['query'] ) ) {
parse_str( $path_parts['query'], $query_params );
$request->set_query_params( $query_params );
}

$response = rest_do_request( $request );
if ( 200 === $response->status ) {
$server = rest_get_server();
/** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
$response = apply_filters( 'rest_post_dispatch', rest_ensure_response( $response ), $server, $request );
$embed = $request->has_param( '_embed' ) ? rest_parse_embed_param( $request['_embed'] ) : false;
$data = (array) $server->response_to_data( $response, $embed );

if ( 'OPTIONS' === $method ) {
$memo[ $method ][ $path ] = array(
'body' => $data,
'headers' => $response->headers,
);
} else {
$memo[ $path ] = array(
'body' => $data,
'headers' => $response->headers,
);
}
}

return $memo;
}

/**
* Parses the "_embed" parameter into the list of resources to embed.
*
* @since 5.4.0
*
* @param string|array $embed Raw "_embed" parameter value.
* @return true|string[] Either true to embed all embeds, or a list of relations to embed.
*/
function rest_parse_embed_param( $embed ) {
if ( ! $embed || 'true' === $embed || '1' === $embed ) {
return true;
}

$rels = wp_parse_list( $embed );

if ( ! $rels ) {
return true;
}

return $rels;
}

/**
* Filters the response to remove any fields not available in the given context.
*
* @since 5.5.0
* @since 5.6.0 Support the "patternProperties" keyword for objects.
* Support the "anyOf" and "oneOf" keywords.
*
* @param array|object $response_data The response data to modify.
* @param array $schema The schema for the endpoint used to filter the response.
* @param string $context The requested context.
* @return array|object The filtered response data.
*/
function rest_filter_response_by_context( $response_data, $schema, $context ) {
if ( isset( $schema['anyOf'] ) ) {
$matching_schema = rest_find_any_matching_schema( $response_data, $schema, '' );
if ( ! is_wp_error( $matching_schema ) ) {
if ( ! isset( $schema['type'] ) ) {
$schema['type'] = $matching_schema['type'];
}

$response_data = rest_filter_response_by_context( $response_data, $matching_schema, $context );
}
}

if ( isset( $schema['oneOf'] ) ) {
$matching_schema = rest_find_one_matching_schema( $response_data, $schema, '', true );
if ( ! is_wp_error( $matching_schema ) ) {
if ( ! isset( $schema['type'] ) ) {
$schema['type'] = $matching_schema['type'];
}

$response_data = rest_filter_response_by_context( $response_data, $matching_schema, $context );
}
}

if ( ! is_array( $response_data ) && ! is_object( $response_data ) ) {
return $response_data;
}

if ( isset( $schema['type'] ) ) {
$type = $schema['type'];
} elseif ( isset( $schema['properties'] ) ) {
$type = 'object'; // Back compat if a developer accidentally omitted the type.
} else {
return $response_data;
}

$is_array_type = 'array' === $type || ( is_array( $type ) && in_array( 'array', $type, true ) );
$is_object_type = 'object' === $type || ( is_array( $type ) && in_array( 'object', $type, true ) );

if ( $is_array_type && $is_object_type ) {
if ( rest_is_array( $response_data ) ) {
$is_object_type = false;
} else {
$is_array_type = false;
}
}

$has_additional_properties = $is_object_type && isset( $schema['additionalProperties'] ) && is_array( $schema['additionalProperties'] );

foreach ( $response_data as $key => $value ) {
$check = array();

if ( $is_array_type ) {
$check = isset( $schema['items'] ) ? $schema['items'] : array();
} elseif ( $is_object_type ) {
if ( isset( $schema['properties'][ $key ] ) ) {
$check = $schema['properties'][ $key ];
} else {
$pattern_property_schema = rest_find_matching_pattern_property_schema( $key, $schema );
if ( null !== $pattern_property_schema ) {
$check = $pattern_property_schema;
} elseif ( $has_additional_properties ) {
$check = $schema['additionalProperties'];
}
}
}

if ( ! isset( $check['context'] ) ) {
continue;
}

if ( ! in_array( $context, $check['context'], true ) ) {
if ( $is_array_type ) {
// All array items share schema, so there's no need to check each one.
$response_data = array();
break;
}

if ( is_object( $response_data ) ) {
unset( $response_data->$key );
} else {
unset( $response_data[ $key ] );
}
} elseif ( is_array( $value ) || is_object( $value ) ) {
$new_value = rest_filter_response_by_context( $value, $check, $context );

if ( is_object( $response_data ) ) {
$response_data->$key = $new_value;
} else {
$response_data[ $key ] = $new_value;
}
}
}

return $response_data;
}

/**
* Sets the "additionalProperties" to false by default for all object definitions in the schema.
*
* @since 5.5.0
* @since 5.6.0 Support the "patternProperties" keyword.
*
* @param array $schema The schema to modify.
* @return array The modified schema.
*/
function rest_default_additional_properties_to_false( $schema ) {
$type = (array) $schema['type'];

if ( in_array( 'object', $type, true ) ) {
if ( isset( $schema['properties'] ) ) {
foreach ( $schema['properties'] as $key => $child_schema ) {
$schema['properties'][ $key ] = rest_default_additional_properties_to_false( $child_schema );
}
}

if ( isset( $schema['patternProperties'] ) ) {
foreach ( $schema['patternProperties'] as $key => $child_schema ) {
$schema['patternProperties'][ $key ] = rest_default_additional_properties_to_false( $child_schema );
}
}

if ( ! isset( $schema['additionalProperties'] ) ) {
$schema['additionalProperties'] = false;
}
}

if ( in_array( 'array', $type, true ) ) {
if ( isset( $schema['items'] ) ) {
$schema['items'] = rest_default_additional_properties_to_false( $schema['items'] );
}
}

return $schema;
}

/**
* Gets the REST API route for a post.
*
* @since 5.5.0
*
* @param int|WP_Post $post Post ID or post object.
* @return string The route path with a leading slash for the given post,
* or an empty string if there is not a route.
*/
function rest_get_route_for_post( $post ) {
$post = get_post( $post );

if ( ! $post instanceof WP_Post ) {
return '';
}

$post_type_route = rest_get_route_for_post_type_items( $post->post_type );
if ( ! $post_type_route ) {
return '';
}

$route = sprintf( '%s/%d', $post_type_route, $post->ID );

/**
* Filters the REST API route for a post.
*
* @since 5.5.0
*
* @param string $route The route path.
* @param WP_Post $post The post object.
*/
return apply_filters( 'rest_route_for_post', $route, $post );
}

/**
* Gets the REST API route for a post type.
*
* @since 5.9.0
*
* @param string $post_type The name of a registered post type.
* @return string The route path with a leading slash for the given post type,
* or an empty string if there is not a route.
*/
function rest_get_route_for_post_type_items( $post_type ) {
$post_type = get_post_type_object( $post_type );
if ( ! $post_type ) {
return '';
}

if ( ! $post_type->show_in_rest ) {
return '';
}

$namespace = ! empty( $post_type->rest_namespace ) ? $post_type->rest_namespace : 'wp/v2';
$rest_base = ! empty( $post_type->rest_base ) ? $post_type->rest_base : $post_type->name;
$route = sprintf( '/%s/%s', $namespace, $rest_base );

/**
* Filters the REST API route for a post type.
*
* @since 5.9.0
*
* @param string $route The route path.
* @param WP_Post_Type $post_type The post type object.
*/
return apply_filters( 'rest_route_for_post_type_items', $route, $post_type );
}

/**
* Gets the REST API route for a term.
*
* @since 5.5.0
*
* @param int|WP_Term $term Term ID or term object.
* @return string The route path with a leading slash for the given term,
* or an empty string if there is not a route.
*/
function rest_get_route_for_term( $term ) {
$term = get_term( $term );

if ( ! $term instanceof WP_Term ) {
return '';
}

$taxonomy_route = rest_get_route_for_taxonomy_items( $term->taxonomy );
if ( ! $taxonomy_route ) {
return '';
}

$route = sprintf( '%s/%d', $taxonomy_route, $term->term_id );

/**
* Filters the REST API route for a term.
*
* @since 5.5.0
*
* @param string $route The route path.
* @param WP_Term $term The term object.
*/
return apply_filters( 'rest_route_for_term', $route, $term );
}

/**
* Gets the REST API route for a taxonomy.
*
* @since 5.9.0
*
* @param string $taxonomy Name of taxonomy.
* @return string The route path with a leading slash for the given taxonomy.
*/
function rest_get_route_for_taxonomy_items( $taxonomy ) {
$taxonomy = get_taxonomy( $taxonomy );
if ( ! $taxonomy ) {
return '';
}

if ( ! $taxonomy->show_in_rest ) {
return '';
}

$namespace = ! empty( $taxonomy->rest_namespace ) ? $taxonomy->rest_namespace : 'wp/v2';
$rest_base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
$route = sprintf( '/%s/%s', $namespace, $rest_base );

/**
* Filters the REST API route for a taxonomy.
*
* @since 5.9.0
*
* @param string $route The route path.
* @param WP_Taxonomy $taxonomy The taxonomy object.
*/
return apply_filters( 'rest_route_for_taxonomy_items', $route, $taxonomy );
}

/**
* Gets the REST route for the currently queried object.
*
* @since 5.5.0
*
* @return string The REST route of the resource, or an empty string if no resource identified.
*/
function rest_get_queried_resource_route() {
if ( is_singular() ) {
$route = rest_get_route_for_post( get_queried_object() );
} elseif ( is_category() || is_tag() || is_tax() ) {
$route = rest_get_route_for_term( get_queried_object() );
} elseif ( is_author() ) {
$route = '/wp/v2/users/' . get_queried_object_id();
} else {
$route = '';
}

/**
* Filters the REST route for the currently queried object.
*
* @since 5.5.0
*
* @param string $link The route with a leading slash, or an empty string.
*/
return apply_filters( 'rest_queried_resource_route', $route );
}

/**
* Retrieves an array of endpoint arguments from the item schema and endpoint method.
*
* @since 5.6.0
*
* @param array $schema The full JSON schema for the endpoint.
* @param string $method Optional. HTTP method of the endpoint. The arguments for `CREATABLE` endpoints are
* checked for required values and may fall-back to a given default, this is not done
* on `EDITABLE` endpoints. Default WP_REST_Server::CREATABLE.
* @return array The endpoint arguments.
*/
function rest_get_endpoint_args_for_schema( $schema, $method = WP_REST_Server::CREATABLE ) {

$schema_properties = ! empty( $schema['properties'] ) ? $schema['properties'] : array();
$endpoint_args = array();
$valid_schema_properties = rest_get_allowed_schema_keywords();
$valid_schema_properties = array_diff( $valid_schema_properties, array( 'default', 'required' ) );

foreach ( $schema_properties as $field_id => $params ) {

// Arguments specified as `readonly` are not allowed to be set.
if ( ! empty( $params['readonly'] ) ) {
continue;
}

$endpoint_args[ $field_id ] = array(
'validate_callback' => 'rest_validate_request_arg',
'sanitize_callback' => 'rest_sanitize_request_arg',
);

if ( WP_REST_Server::CREATABLE === $method && isset( $params['default'] ) ) {
$endpoint_args[ $field_id ]['default'] = $params['default'];
}

if ( WP_REST_Server::CREATABLE === $method && ! empty( $params['required'] ) ) {
$endpoint_args[ $field_id ]['required'] = true;
}

foreach ( $valid_schema_properties as $schema_prop ) {
if ( isset( $params[ $schema_prop ] ) ) {
$endpoint_args[ $field_id ][ $schema_prop ] = $params[ $schema_prop ];
}
}

// Merge in any options provided by the schema property.
if ( isset( $params['arg_options'] ) ) {

// Only use required / default from arg_options on CREATABLE endpoints.
if ( WP_REST_Server::CREATABLE !== $method ) {
$params['arg_options'] = array_diff_key(
$params['arg_options'],
array(
'required' => '',
'default' => '',
)
);
}

$endpoint_args[ $field_id ] = array_merge( $endpoint_args[ $field_id ], $params['arg_options'] );
}
}

return $endpoint_args;
}


/**
* Converts an error to a response object.
*
* This iterates over all error codes and messages to change it into a flat
* array. This enables simpler client behavior, as it is represented as a
* list in JSON rather than an object/map.
*
* @since 5.7.0
*
* @param WP_Error $error WP_Error instance.
*
* @return WP_REST_Response List of associative arrays with code and message keys.
*/
function rest_convert_error_to_response( $error ) {
$status = array_reduce(
$error->get_all_error_data(),
static function ( $status, $error_data ) {
return is_array( $error_data ) && isset( $error_data['status'] ) ? $error_data['status'] : $status;
},
500
);

$errors = array();

foreach ( (array) $error->errors as $code => $messages ) {
$all_data = $error->get_all_error_data( $code );
$last_data = array_pop( $all_data );

foreach ( (array) $messages as $message ) {
$formatted = array(
'code' => $code,
'message' => $message,
'data' => $last_data,
);

if ( $all_data ) {
$formatted['additional_data'] = $all_data;
}

$errors[] = $formatted;
}
}

$data = $errors[0];
if ( count( $errors ) > 1 ) {
// Remove the primary error.
array_shift( $errors );
$data['additional_errors'] = $errors;
}

return new WP_REST_Response( $data, $status );
}

/**
* Checks whether a REST API endpoint request is currently being handled.
*
* This may be a standalone REST API request, or an internal request dispatched from within a regular page load.
*
* @since 6.5.0
*
* @global WP_REST_Server $wp_rest_server REST server instance.
*
* @return bool True if a REST endpoint request is currently being handled, false otherwise.
*/
function wp_is_rest_endpoint() {
/* @var WP_REST_Server $wp_rest_server */
global $wp_rest_server;

// Check whether this is a standalone REST request.
$is_rest_endpoint = wp_is_serving_rest_request();
if ( ! $is_rest_endpoint ) {
// Otherwise, check whether an internal REST request is currently being handled.
$is_rest_endpoint = isset( $wp_rest_server )
&& $wp_rest_server->is_dispatching();
}

/**
* Filters whether a REST endpoint request is currently being handled.
*
* This may be a standalone REST API request, or an internal request dispatched from within a regular page load.
*
* @since 6.5.0
*
* @param bool $is_request_endpoint Whether a REST endpoint request is currently being handled.
*/
return (bool) apply_filters( 'wp_is_rest_endpoint', $is_rest_endpoint );
}