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<?php
/**
 * Register WP REST API endpoints for Jetpack.
 *
 * @author Automattic
 */

/**
 * Disable direct access.
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// Load WP_Error for error messages.
require_once ABSPATH . '/wp-includes/class-wp-error.php';

// Register endpoints when WP REST API is initialized.
add_action( 'rest_api_init', array( 'Jetpack_Core_Json_Api_Endpoints', 'register_endpoints' ) );

/**
 * Class Jetpack_Core_Json_Api_Endpoints
 *
 * @since 4.3.0
 */
class Jetpack_Core_Json_Api_Endpoints {

/**
	 * @var string Generic error message when user is not allowed to perform an action.
	 */
	public static $user_permissions_error_msg;

/**
	 * @var array Roles that can access Stats once they're granted access.
	 */
	public static $stats_roles;

/**
	 * Declare the Jetpack REST API endpoints.
	 *
	 * @since 4.3.0
	 */
	public static function register_endpoints() {

// Load API endpoint base classes
		require_once JETPACK__PLUGIN_DIR . '_inc/lib/core-api/class.jetpack-core-api-xmlrpc-consumer-endpoint.php';

// Load API endpoints
		require_once JETPACK__PLUGIN_DIR . '_inc/lib/core-api/class.jetpack-core-api-module-endpoints.php';
		require_once JETPACK__PLUGIN_DIR . '_inc/lib/core-api/class.jetpack-core-api-site-endpoints.php';

self::$user_permissions_error_msg = esc_html__(
			'You do not have the correct user permissions to perform this action.
			Please contact your site admin if you think this is a mistake.',
			'jetpack'
		);

self::$stats_roles = array( 'administrator', 'editor', 'author', 'contributor', 'subscriber' );

Jetpack::load_xml_rpc_client();
		$ixr_client = new Jetpack_IXR_Client( array( 'user_id' => get_current_user_id() ) );
		$core_api_endpoint = new Jetpack_Core_API_Data( $ixr_client );
		$module_list_endpoint = new Jetpack_Core_API_Module_List_Endpoint();
		$module_data_endpoint = new Jetpack_Core_API_Module_Data_Endpoint();
		$module_toggle_endpoint = new Jetpack_Core_API_Module_Toggle_Endpoint( new Jetpack_IXR_Client() );
		$site_endpoint = new Jetpack_Core_API_Site_Endpoint();

register_rest_route( 'jetpack/v4', '/jitm', array(
			'methods'  => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::get_jitm_message',
		) );

register_rest_route( 'jetpack/v4', '/jitm', array(
			'methods'  => WP_REST_Server::CREATABLE,
			'callback' => __CLASS__ . '::delete_jitm_message'
		) );

// Register a site
		register_rest_route( 'jetpack/v4', '/verify_registration', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::verify_registration',
		) );

// Authorize a remote user
		register_rest_route( 'jetpack/v4', '/remote_authorize', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::remote_authorize',
		) );

// Get current connection status of Jetpack
		register_rest_route( 'jetpack/v4', '/connection', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::jetpack_connection_status',
		) );

// Fetches a fresh connect URL
		register_rest_route( 'jetpack/v4', '/connection/url', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::build_connect_url',
			'permission_callback' => __CLASS__ . '::connect_url_permission_callback',
		) );

// Get current user connection data
		register_rest_route( 'jetpack/v4', '/connection/data', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::get_user_connection_data',
			'permission_callback' => __CLASS__ . '::get_user_connection_data_permission_callback',
		) );

// Disconnect site from WordPress.com servers
		register_rest_route( 'jetpack/v4', '/connection', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::disconnect_site',
			'permission_callback' => __CLASS__ . '::disconnect_site_permission_callback',
		) );

// Disconnect/unlink user from WordPress.com servers
		register_rest_route( 'jetpack/v4', '/connection/user', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::unlink_user',
			'permission_callback' => __CLASS__ . '::unlink_user_permission_callback',
		) );

// Get current site data
		register_rest_route( 'jetpack/v4', '/site', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::get_site_data',
			'permission_callback' => __CLASS__ . '::view_admin_page_permission_check',
		) );

// Get current site data
		register_rest_route( 'jetpack/v4', '/site/features', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => array( $site_endpoint, 'get_features' ),
			'permission_callback' => array( $site_endpoint , 'can_request' ),
		) );

// Confirm that a site in identity crisis should be in staging mode
		register_rest_route( 'jetpack/v4', '/identity-crisis/confirm-safe-mode', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::confirm_safe_mode',
			'permission_callback' => __CLASS__ . '::identity_crisis_mitigation_permission_check',
		) );

// IDC resolve: create an entirely new shadow site for this URL.
		register_rest_route( 'jetpack/v4', '/identity-crisis/start-fresh', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::start_fresh_connection',
			'permission_callback' => __CLASS__ . '::identity_crisis_mitigation_permission_check',
		) );

// Handles the request to migrate stats and subscribers during an identity crisis.
		register_rest_route( 'jetpack/v4', 'identity-crisis/migrate', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::migrate_stats_and_subscribers',
			'permissison_callback' => __CLASS__ . '::identity_crisis_mitigation_permission_check',
		) );

// Return all modules
		register_rest_route( 'jetpack/v4', '/module/all', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => array( $module_list_endpoint, 'process' ),
			'permission_callback' => array( $module_list_endpoint, 'can_request' ),
		) );

// Activate many modules
		register_rest_route( 'jetpack/v4', '/module/all/active', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => array( $module_list_endpoint, 'process' ),
			'permission_callback' => array( $module_list_endpoint, 'can_request' ),
			'args' => array(
				'modules' => array(
					'default'           => '',
					'type'              => 'array',
					'items'             => array(
						'type'          => 'string',
					),
					'required'          => true,
					'validate_callback' => __CLASS__ . '::validate_module_list',
				),
				'active' => array(
					'default'           => true,
					'type'              => 'boolean',
					'required'          => false,
					'validate_callback' => __CLASS__ . '::validate_boolean',
				),
			)
		) );

// Return a single module and update it when needed
		register_rest_route( 'jetpack/v4', '/module/(?P<slug>[a-z\-]+)', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => array( $core_api_endpoint, 'process' ),
			'permission_callback' => array( $core_api_endpoint, 'can_request' ),
		) );

// Activate and deactivate a module
		register_rest_route( 'jetpack/v4', '/module/(?P<slug>[a-z\-]+)/active', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => array( $module_toggle_endpoint, 'process' ),
			'permission_callback' => array( $module_toggle_endpoint, 'can_request' ),
			'args' => array(
				'active' => array(
					'default'           => true,
					'type'              => 'boolean',
					'required'          => true,
					'validate_callback' => __CLASS__ . '::validate_boolean',
				),
			)
		) );

// Update a module
		register_rest_route( 'jetpack/v4', '/module/(?P<slug>[a-z\-]+)', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => array( $core_api_endpoint, 'process' ),
			'permission_callback' => array( $core_api_endpoint, 'can_request' ),
			'args' => self::get_updateable_parameters( 'any' )
		) );

// Get data for a specific module, i.e. Protect block count, WPCOM stats,
		// Akismet spam count, etc.
		register_rest_route( 'jetpack/v4', '/module/(?P<slug>[a-z\-]+)/data', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => array( $module_data_endpoint, 'process' ),
			'permission_callback' => array( $module_data_endpoint, 'can_request' ),
			'args' => array(
				'range' => array(
					'default'           => 'day',
					'type'              => 'string',
					'required'          => false,
					'validate_callback' => __CLASS__ . '::validate_string',
				),
			)
		) );

// Check if the API key for a specific service is valid or not
		register_rest_route( 'jetpack/v4', '/module/(?P<service>[a-z\-]+)/key/check', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => array( $module_data_endpoint, 'key_check' ),
			'permission_callback' => __CLASS__ . '::update_settings_permission_check',
			'sanitize_callback' => 'sanitize_text_field',
		) );

register_rest_route( 'jetpack/v4', '/module/(?P<service>[a-z\-]+)/key/check', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => array( $module_data_endpoint, 'key_check' ),
			'permission_callback' => __CLASS__ . '::update_settings_permission_check',
			'sanitize_callback' => 'sanitize_text_field',
			'args' => array(
				'api_key' => array(
					'default'           => '',
					'type'              => 'string',
					'validate_callback' => __CLASS__ . '::validate_alphanum',
				),
			)
		) );

// Update any Jetpack module option or setting
		register_rest_route( 'jetpack/v4', '/settings', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => array( $core_api_endpoint, 'process' ),
			'permission_callback' => array( $core_api_endpoint, 'can_request' ),
			'args' => self::get_updateable_parameters( 'any' )
		) );

// Update a module
		register_rest_route( 'jetpack/v4', '/settings/(?P<slug>[a-z\-]+)', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => array( $core_api_endpoint, 'process' ),
			'permission_callback' => array( $core_api_endpoint, 'can_request' ),
			'args' => self::get_updateable_parameters()
		) );

// Return all module settings
		register_rest_route( 'jetpack/v4', '/settings/', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => array( $core_api_endpoint, 'process' ),
			'permission_callback' => array( $core_api_endpoint, 'can_request' ),
		) );

// Reset all Jetpack options
		register_rest_route( 'jetpack/v4', '/options/(?P<options>[a-z\-]+)', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::reset_jetpack_options',
			'permission_callback' => __CLASS__ . '::manage_modules_permission_check',
		) );

// Return current Jumpstart status
		register_rest_route( 'jetpack/v4', '/jumpstart', array(
			'methods'             => WP_REST_Server::READABLE,
			'callback'            => __CLASS__ . '::jumpstart_status',
			'permission_callback' => __CLASS__ . '::update_settings_permission_check',
		) );

// Update Jumpstart
		register_rest_route( 'jetpack/v4', '/jumpstart', array(
			'methods'             => WP_REST_Server::EDITABLE,
			'callback'            => __CLASS__ . '::jumpstart_toggle',
			'permission_callback' => __CLASS__ . '::manage_modules_permission_check',
			'args'                => array(
				'active' => array(
					'required'          => true,
					'validate_callback' => __CLASS__  . '::validate_boolean',
				),
			),
		) );

// Updates: get number of plugin updates available
		register_rest_route( 'jetpack/v4', '/updates/plugins', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::get_plugin_update_count',
			'permission_callback' => __CLASS__ . '::view_admin_page_permission_check',
		) );

// Dismiss Jetpack Notices
		register_rest_route( 'jetpack/v4', '/notice/(?P<notice>[a-z\-_]+)', array(
			'methods' => WP_REST_Server::EDITABLE,
			'callback' => __CLASS__ . '::dismiss_notice',
			'permission_callback' => __CLASS__ . '::view_admin_page_permission_check',
		) );

// Plugins: get list of all plugins.
		register_rest_route( 'jetpack/v4', '/plugins', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::get_plugins',
			'permission_callback' => __CLASS__ . '::activate_plugins_permission_check',
		) );

// Plugins: check if the plugin is active.
		register_rest_route( 'jetpack/v4', '/plugin/(?P<plugin>[a-z\/\.\-_]+)', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => __CLASS__ . '::get_plugin',
			'permission_callback' => __CLASS__ . '::activate_plugins_permission_check',
		) );
	}

/**
	 * Asks for a jitm, unless they've been disabled, in which case it returns an empty array
	 *
	 * @param $request WP_REST_Request
	 *
	 * @return array An array of jitms
	 */
	public static function get_jitm_message( $request ) {
		require_once( JETPACK__PLUGIN_DIR . 'class.jetpack-jitm.php' );

$jitm = Jetpack_JITM::init();

if ( ! $jitm ) {
			return array();
		}

return $jitm->get_messages( $request['message_path'], urldecode_deep( $request['query'] ) );
	}

/**
	 * Dismisses a jitm
	 * @param $request WP_REST_Request The request
	 *
	 * @return bool Always True
	 */
	public static function delete_jitm_message( $request ) {
		require_once( JETPACK__PLUGIN_DIR . 'class.jetpack-jitm.php' );

$jitm = Jetpack_JITM::init();

if ( ! $jitm ) {
			return true;
		}

return $jitm->dismiss( $request['id'], $request['feature_class'] );
	}

/**
	 * Handles verification that a site is registered
	 *
	 * @since 5.4.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return array|wp-error
	 */
	public static function verify_registration( $request ) {
		require_once JETPACK__PLUGIN_DIR . 'class.jetpack-xmlrpc-server.php';
		$xmlrpc_server = new Jetpack_XMLRPC_Server();
		$result = $xmlrpc_server->verify_registration( array( $request['secret_1'], $request['state'] ) );

if ( is_a( $result, 'IXR_Error' ) ) {
			$result = new WP_Error( $result->code, $result->message );
		}

return $result;
	}

/**
	 * Handles verification that a site is registered
	 *
	 * @since 5.4.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return array|wp-error
	 */
	 public static function remote_authorize( $request ) {
		require_once JETPACK__PLUGIN_DIR . 'class.jetpack-xmlrpc-server.php';
		$xmlrpc_server = new Jetpack_XMLRPC_Server();
		$result = $xmlrpc_server->remote_authorize( $request );

if ( is_a( $result, 'IXR_Error' ) ) {
			$result = new WP_Error( $result->code, $result->message );
		}

return $result;
	 }

/**
	 * Handles dismissing of Jetpack Notices
	 *
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return array|wp-error
	 */
	public static function dismiss_notice( $request ) {
		$notice = $request['notice'];

if ( ! isset( $request['dismissed'] ) || $request['dismissed'] !== true ) {
			return new WP_Error( 'invalid_param', esc_html__( 'Invalid parameter "dismissed".', 'jetpack' ), array( 'status' => 404 ) );
		}

if ( isset( $notice ) && ! empty( $notice ) ) {
			switch( $notice ) {
				case 'feedback_dash_request':
				case 'welcome':
					$notices = get_option( 'jetpack_dismissed_notices', array() );
					$notices[ $notice ] = true;
					update_option( 'jetpack_dismissed_notices', $notices );
					return rest_ensure_response( get_option( 'jetpack_dismissed_notices', array() ) );

default:
					return new WP_Error( 'invalid_param', esc_html__( 'Invalid parameter "notice".', 'jetpack' ), array( 'status' => 404 ) );
			}
		}

return new WP_Error( 'required_param', esc_html__( 'Missing parameter "notice".', 'jetpack' ), array( 'status' => 404 ) );
	}

/**
	 * Verify that the user can disconnect the site.
	 *
	 * @since 4.3.0
	 *
	 * @return bool|WP_Error True if user is able to disconnect the site.
	 */
	public static function disconnect_site_permission_callback() {
		if ( current_user_can( 'jetpack_disconnect' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_jetpack_disconnect', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );

}

/**
	 * Verify that the user can get a connect/link URL
	 *
	 * @since 4.3.0
	 *
	 * @return bool|WP_Error True if user is able to disconnect the site.
	 */
	public static function connect_url_permission_callback() {
		if ( current_user_can( 'jetpack_connect_user' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_jetpack_disconnect', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );

}

/**
	 * Verify that a user can get the data about the current user.
	 * Only those who can connect.
	 *
	 * @since 4.3.0
	 *
	 * @uses Jetpack::is_user_connected();
	 *
	 * @return bool|WP_Error True if user is able to unlink.
	 */
	public static function get_user_connection_data_permission_callback() {
		if ( current_user_can( 'jetpack_connect_user' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_user_connection_data', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Verify that a user can use the /connection/user endpoint. Has to be a registered user and be currently linked.
	 *
	 * @since 4.3.0
	 *
	 * @uses Jetpack::is_user_connected();
	 *
	 * @return bool|WP_Error True if user is able to unlink.
	 */
	public static function unlink_user_permission_callback() {
		if ( current_user_can( 'jetpack_connect_user' ) && Jetpack::is_user_connected( get_current_user_id() ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_unlink_user', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Verify that user can manage Jetpack modules.
	 *
	 * @since 4.3.0
	 *
	 * @return bool Whether user has the capability 'jetpack_manage_modules'.
	 */
	public static function manage_modules_permission_check() {
		if ( current_user_can( 'jetpack_manage_modules' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_manage_modules', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Verify that user can update Jetpack modules.
	 *
	 * @since 4.3.0
	 *
	 * @return bool Whether user has the capability 'jetpack_configure_modules'.
	 */
	public static function configure_modules_permission_check() {
		if ( current_user_can( 'jetpack_configure_modules' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_configure_modules', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Verify that user can view Jetpack admin page.
	 *
	 * @since 4.3.0
	 *
	 * @return bool Whether user has the capability 'jetpack_admin_page'.
	 */
	public static function view_admin_page_permission_check() {
		if ( current_user_can( 'jetpack_admin_page' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_view_admin', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Verify that user can mitigate an identity crisis.
	 *
	 * @since 4.4.0
	 *
	 * @return bool Whether user has capability 'jetpack_disconnect'.
	 */
	public static function identity_crisis_mitigation_permission_check() {
		if ( current_user_can( 'jetpack_disconnect' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_identity_crisis', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Verify that user can update Jetpack general settings.
	 *
	 * @since 4.3.0
	 *
	 * @return bool Whether user has the capability 'update_settings_permission_check'.
	 */
	public static function update_settings_permission_check() {
		if ( current_user_can( 'jetpack_configure_modules' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_manage_settings', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Verify that user can view Jetpack admin page and can activate plugins.
	 *
	 * @since 4.3.0
	 *
	 * @return bool Whether user has the capability 'jetpack_admin_page' and 'activate_plugins'.
	 */
	public static function activate_plugins_permission_check() {
		if ( current_user_can( 'jetpack_admin_page' ) && current_user_can( 'activate_plugins' ) ) {
			return true;
		}

return new WP_Error( 'invalid_user_permission_activate_plugins', self::$user_permissions_error_msg, array( 'status' => self::rest_authorization_required_code() ) );
	}

/**
	 * Contextual HTTP error code for authorization failure.
	 *
	 * Taken from rest_authorization_required_code() in WP-API plugin until is added to core.
	 * @see https://github.com/WP-API/WP-API/commit/7ba0ae6fe4f605d5ffe4ee85b1cd5f9fb46900a6
	 *
	 * @since 4.3.0
	 *
	 * @return int
	 */
	public static function rest_authorization_required_code() {
		return is_user_logged_in() ? 403 : 401;
	}

/**
	 * Get connection status for this Jetpack site.
	 *
	 * @since 4.3.0
	 *
	 * @return bool True if site is connected
	 */
	public static function jetpack_connection_status() {
		return rest_ensure_response( array(
				'isActive'  => Jetpack::is_active(),
				'isStaging' => Jetpack::is_staging_site(),
				'devMode'   => array(
					'isActive' => Jetpack::is_development_mode(),
					'constant' => defined( 'JETPACK_DEV_DEBUG' ) && JETPACK_DEV_DEBUG,
					'url'      => site_url() && false === strpos( site_url(), '.' ),
					'filter'   => apply_filters( 'jetpack_development_mode', false ),
				),
			)
		);
	}

/**
	 * Disconnects Jetpack from the WordPress.com Servers
	 *
	 * @uses Jetpack::disconnect();
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return bool|WP_Error True if Jetpack successfully disconnected.
	 */
	public static function disconnect_site( $request ) {

if ( ! isset( $request['isActive'] ) || $request['isActive'] !== false ) {
			return new WP_Error( 'invalid_param', esc_html__( 'Invalid Parameter', 'jetpack' ), array( 'status' => 404 ) );
		}

if ( Jetpack::is_active() ) {
			Jetpack::disconnect();
			return rest_ensure_response( array( 'code' => 'success' ) );
		}

return new WP_Error( 'disconnect_failed', esc_html__( 'Was not able to disconnect the site.  Please try again.', 'jetpack' ), array( 'status' => 400 ) );
	}

/**
	 * Gets a new connect raw URL with fresh nonce.
	 *
	 * @uses Jetpack::disconnect();
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return string|WP_Error A raw URL if the connection URL could be built; error message otherwise.
	 */
	public static function build_connect_url() {
		$url = Jetpack::init()->build_connect_url( true, false, false );
		if ( $url ) {
			return rest_ensure_response( $url );
		}

return new WP_Error( 'build_connect_url_failed', esc_html__( 'Unable to build the connect URL.  Please reload the page and try again.', 'jetpack' ), array( 'status' => 400 ) );
	}

/**
	 * Get miscellaneous user data related to the connection. Similar data available in old "My Jetpack".
	 * Information about the master/primary user.
	 * Information about the current user.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return object
	 */
	public static function get_user_connection_data() {
		require_once( JETPACK__PLUGIN_DIR . '_inc/lib/admin-pages/class.jetpack-react-page.php' );

$response = array(
//			'othersLinked' => Jetpack::get_other_linked_admins(),
			'currentUser'  => jetpack_current_user_data(),
		);
		return rest_ensure_response( $response );
	}

/**
	 * Returns the proper name for Jetpack Holiday Snow setting.
	 * When the REST route starts, the holiday-snow.php file where jetpack_holiday_snow_option_name() function is defined is not loaded,
	 * so where using this to replicate it and have the same functionality.
	 *
	 * @since 4.4.0
	 *
	 * @return string
	 */
	public static function holiday_snow_option_name() {
		/** This filter is documented in modules/holiday-snow.php */
		return apply_filters( 'jetpack_holiday_snow_option_name', 'jetpack_holiday_snow_enabled' );
	}

/**
	 * Update a single miscellaneous setting for this Jetpack installation, like Holiday Snow.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return object Jetpack miscellaneous settings.
	 */
	public static function update_setting( $request ) {
		// Get parameters to update the module.
		$param = $request->get_params();

// Exit if no parameters were passed.
		if ( ! is_array( $param ) ) {
			return new WP_Error( 'missing_setting', esc_html__( 'Missing setting.', 'jetpack' ), array( 'status' => 404 ) );
		}

// Get option name and value.
		$option = key( $param );
		$value  = current( $param );

// Log success or not
		$updated = false;

switch ( $option ) {
			case self::holiday_snow_option_name():
				$updated = update_option( $option, ( true == (bool) $value ) ? 'letitsnow' : '' );
				break;
		}

if ( $updated ) {
			return rest_ensure_response( array(
				'code' 	  => 'success',
				'message' => esc_html__( 'Setting updated.', 'jetpack' ),
				'value'   => $value,
			) );
		}

return new WP_Error( 'setting_not_updated', esc_html__( 'The setting was not updated.', 'jetpack' ), array( 'status' => 400 ) );
	}

/**
	 * Unlinks current user from the WordPress.com Servers.
	 *
	 * @since 4.3.0
	 * @uses  Jetpack::unlink_user
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return bool|WP_Error True if user successfully unlinked.
	 */
	public static function unlink_user( $request ) {

if ( ! isset( $request['linked'] ) || $request['linked'] !== false ) {
			return new WP_Error( 'invalid_param', esc_html__( 'Invalid Parameter', 'jetpack' ), array( 'status' => 404 ) );
		}

if ( Jetpack::unlink_user() ) {
			return rest_ensure_response(
				array(
					'code' => 'success'
				)
			);
		}

return new WP_Error( 'unlink_user_failed', esc_html__( 'Was not able to unlink the user.  Please try again.', 'jetpack' ), array( 'status' => 400 ) );
	}

/**
	 * Get site data, including for example, the site's current plan.
	 *
	 * @since 4.3.0
	 *
	 * @return array Array of Jetpack modules.
	 */
	public static function get_site_data() {

if ( $site_id = Jetpack_Options::get_option( 'id' ) ) {

$response = Jetpack_Client::wpcom_json_api_request_as_blog( sprintf( '/sites/%d', $site_id ) .'?force=wpcom', '1.1' );

if ( 200 !== wp_remote_retrieve_response_code( $response ) ) {
				return new WP_Error( 'site_data_fetch_failed', esc_html__( 'Failed fetching site data. Try again later.', 'jetpack' ), array( 'status' => 400 ) );
			}

// Save plan details in the database for future use without API calls
			$results = json_decode( $response['body'], true );

if ( is_array( $results ) && isset( $results['plan'] ) ) {

// Set flag for newly purchased plan
				$current_plan = Jetpack::get_active_plan();
				if ( $current_plan['product_slug'] !== $results['plan']['product_slug'] && 'jetpack_free' !== $results['plan']['product_slug'] ) {
					update_option( 'show_welcome_for_new_plan', true ) ;
				}

update_option( 'jetpack_active_plan', $results['plan'] );
			}

return rest_ensure_response( array(
					'code' => 'success',
					'message' => esc_html__( 'Site data correctly received.', 'jetpack' ),
					'data' => wp_remote_retrieve_body( $response ),
				)
			);
		}

return new WP_Error( 'site_id_missing', esc_html__( 'The ID of this site does not exist.', 'jetpack' ), array( 'status' => 404 ) );
	}

/**
	 * Handles identity crisis mitigation, confirming safe mode for this site.
	 *
	 * @since 4.4.0
	 *
	 * @return bool | WP_Error True if option is properly set.
	 */
	public static function confirm_safe_mode() {
		$updated = Jetpack_Options::update_option( 'safe_mode_confirmed', true );
		if ( $updated ) {
			return rest_ensure_response(
				array(
					'code' => 'success'
				)
			);
		}
		return new WP_Error(
			'error_setting_jetpack_safe_mode',
			esc_html__( 'Could not confirm safe mode.', 'jetpack' ),
			array( 'status' => 500 )
		);
	}

/**
	 * Handles identity crisis mitigation, migrating stats and subscribers from old url to this, new url.
	 *
	 * @since 4.4.0
	 *
	 * @return bool | WP_Error True if option is properly set.
	 */
	public static function migrate_stats_and_subscribers() {
		if ( Jetpack_Options::get_option( 'sync_error_idc' ) && ! Jetpack_Options::delete_option( 'sync_error_idc' ) ) {
			return new WP_Error(
				'error_deleting_sync_error_idc',
				esc_html__( 'Could not delete sync error option.', 'jetpack' ),
				array( 'status' => 500 )
			);
		}

if ( Jetpack_Options::get_option( 'migrate_for_idc' ) || Jetpack_Options::update_option( 'migrate_for_idc', true ) ) {
			return rest_ensure_response(
				array(
					'code' => 'success'
				)
			);
		}
		return new WP_Error(
			'error_setting_jetpack_migrate',
			esc_html__( 'Could not confirm migration.', 'jetpack' ),
			array( 'status' => 500 )
		);
	}

/**
	 * This IDC resolution will disconnect the site and re-connect to a completely new
	 * and separate shadow site than the original.
	 *
	 * It will first will disconnect the site without phoning home as to not disturb the production site.
	 * It then builds a fresh connection URL and sends it back along with the response.
	 *
	 * @since 4.4.0
	 * @return bool|WP_Error
	 */
	public static function start_fresh_connection() {
		// First clear the options / disconnect.
		Jetpack::disconnect();
		return self::build_connect_url();
	}

/**
	 * Reset Jetpack options
	 *
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request {
	 *     Array of parameters received by request.
	 *
	 *     @type string $options Available options to reset are options|modules
	 * }
	 *
	 * @return bool|WP_Error True if options were reset. Otherwise, a WP_Error instance with the corresponding error.
	 */
	public static function reset_jetpack_options( $request ) {

if ( ! isset( $request['reset'] ) || $request['reset'] !== true ) {
			return new WP_Error( 'invalid_param', esc_html__( 'Invalid Parameter', 'jetpack' ), array( 'status' => 404 ) );
		}

if ( isset( $request['options'] ) ) {
			$data = $request['options'];

switch( $data ) {
				case ( 'options' ) :
					$options_to_reset = Jetpack::get_jetpack_options_for_reset();

// Reset the Jetpack options
					foreach ( $options_to_reset['jp_options'] as $option_to_reset ) {
						Jetpack_Options::delete_option( $option_to_reset );
					}

foreach ( $options_to_reset['wp_options'] as $option_to_reset ) {
						delete_option( $option_to_reset );
					}

// Reset to default modules
					$default_modules = Jetpack::get_default_modules();
					Jetpack::update_active_modules( $default_modules );

// Jumpstart option is special
					Jetpack_Options::update_option( 'jumpstart', 'new_connection' );
					return rest_ensure_response( array(
						'code' 	  => 'success',
						'message' => esc_html__( 'Jetpack options reset.', 'jetpack' ),
					) );
					break;

case 'modules':
					$default_modules = Jetpack::get_default_modules();
					Jetpack::update_active_modules( $default_modules );
					return rest_ensure_response( array(
						'code' 	  => 'success',
						'message' => esc_html__( 'Modules reset to default.', 'jetpack' ),
					) );
					break;

default:
					return new WP_Error( 'invalid_param', esc_html__( 'Invalid Parameter', 'jetpack' ), array( 'status' => 404 ) );
			}
		}

return new WP_Error( 'required_param', esc_html__( 'Missing parameter "type".', 'jetpack' ), array( 'status' => 404 ) );
	}

/**
	 * Retrieves the current status of Jumpstart.
	 *
	 * @since 4.5.0
	 *
	 * @return bool
	 */
	public static function jumpstart_status() {
		return array(
			'status' => Jetpack_Options::get_option( 'jumpstart' )
		);
	}

/**
	 * Toggles activation or deactivation of the JumpStart
	 *
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return bool|WP_Error True if toggling Jumpstart succeeded. Otherwise, a WP_Error instance with the corresponding error.
	 */
	public static function jumpstart_toggle( $request ) {

if ( $request[ 'active' ] ) {
			return self::jumpstart_activate( $request );
		} else {
			return self::jumpstart_deactivate( $request );
		}
	}

/**
	 * Activates a series of valid Jetpack modules and initializes some options.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return bool|WP_Error True if Jumpstart succeeded. Otherwise, a WP_Error instance with the corresponding error.
	 */
	public static function jumpstart_activate( $request ) {
		$modules = Jetpack::get_available_modules();
		$activate_modules = array();
		foreach ( $modules as $module ) {
			$module_info = Jetpack::get_module( $module );
			if ( isset( $module_info['feature'] ) && is_array( $module_info['feature'] ) && in_array( 'Jumpstart', $module_info['feature'] ) ) {
				$activate_modules[] = $module;
			}
		}

// Collect success/error messages like modules that are properly activated.
		$result = array(
			'activated_modules' => array(),
			'failed_modules'    => array(),
		);

// Update the jumpstart option
		if ( 'new_connection' === Jetpack_Options::get_option( 'jumpstart' ) ) {
			$result['jumpstart_activated'] = Jetpack_Options::update_option( 'jumpstart', 'jumpstart_activated' );
		}

// Check for possible conflicting plugins
		$module_slugs_filtered = Jetpack::init()->filter_default_modules( $activate_modules );

foreach ( $module_slugs_filtered as $module_slug ) {
			Jetpack::log( 'activate', $module_slug );
			if ( Jetpack::activate_module( $module_slug, false, false ) ) {
				$result['activated_modules'][] = $module_slug;
			} else {
				$result['failed_modules'][] = $module_slug;
			}
		}

// Set the default sharing buttons and set to display on posts if none have been set.
		$sharing_services = get_option( 'sharing-services' );
		$sharing_options  = get_option( 'sharing-options' );
		if ( empty( $sharing_services['visible'] ) ) {
			// Default buttons to set
			$visible = array(
				'twitter',
				'facebook',
				'google-plus-1',
			);
			$hidden = array();

// Set some sharing settings
			if ( class_exists( 'Sharing_Service' ) ) {
				$sharing = new Sharing_Service();
				$sharing_options['global'] = array(
					'button_style'  => 'icon',
					'sharing_label' => $sharing->default_sharing_label,
					'open_links'    => 'same',
					'show'          => array( 'post' ),
					'custom'        => isset( $sharing_options['global']['custom'] ) ? $sharing_options['global']['custom'] : array()
				);

$result['sharing_options']  = update_option( 'sharing-options', $sharing_options );
				$result['sharing_services'] = update_option( 'sharing-services', array( 'visible' => $visible, 'hidden' => $hidden ) );
			}
		}

// If all Jumpstart modules were activated
		if ( empty( $result['failed_modules'] ) ) {
			return rest_ensure_response( array(
				'code' 	  => 'success',
				'message' => esc_html__( 'Jumpstart done.', 'jetpack' ),
				'data'    => $result,
			) );
		}

return new WP_Error( 'jumpstart_failed', esc_html( sprintf( _n( 'Jumpstart failed activating this module: %s.', 'Jumpstart failed activating these modules: %s.', count( $result['failed_modules'] ), 'jetpack' ), join( ', ', $result['failed_modules'] ) ) ), array( 'status' => 400 ) );
	}

/**
	 * Dismisses Jumpstart so user is not prompted to go through it again.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 *
	 * @return bool|WP_Error True if Jumpstart was disabled or was nothing to dismiss. Otherwise, a WP_Error instance with a message.
	 */
	public static function jumpstart_deactivate( $request ) {

// If dismissed, flag the jumpstart option as such.
		if ( 'new_connection' === Jetpack_Options::get_option( 'jumpstart' ) ) {
			if ( Jetpack_Options::update_option( 'jumpstart', 'jumpstart_dismissed' ) ) {
				return rest_ensure_response( array(
					'code' 	  => 'success',
					'message' => esc_html__( 'Jumpstart dismissed.', 'jetpack' ),
				) );
			} else {
				return new WP_Error( 'jumpstart_failed_dismiss', esc_html__( 'Jumpstart could not be dismissed.', 'jetpack' ), array( 'status' => 400 ) );
			}
		}

// If this was not a new connection and there was nothing to dismiss, don't fail.
		return rest_ensure_response( array(
			'code' 	  => 'success',
			'message' => esc_html__( 'Nothing to dismiss. This was not a new connection.', 'jetpack' ),
		) );
	}

/**
	 * Get the query parameters to update module options or general settings.
	 *
	 * @since 4.3.0
	 * @since 4.4.0 Accepts a $selector parameter.
	 *
	 * @param string $selector Selects a set of options to update, Can be empty, a module slug or 'any'.
	 *
	 * @return array
	 */
	public static function get_updateable_parameters( $selector = '' ) {
		$parameters = array(
			'context'     => array(
				'default' => 'edit',
			),
		);

return array_merge( $parameters, self::get_updateable_data_list( $selector ) );
	}

/**
	 * Returns a list of module options or general settings that can be updated.
	 *
	 * @since 4.3.0
	 * @since 4.4.0 Accepts 'any' as a parameter which will make it return the entire list.
	 *
	 * @param string|array $selector Module slug, 'any', or an array of parameters.
	 *                               If empty, it's assumed we're updating a module and we'll try to get its slug.
	 *                               If 'any' the full list is returned.
	 *                               If it's an array of parameters, includes the elements by matching keys.
	 *
	 * @return array
	 */
	public static function get_updateable_data_list( $selector = '' ) {

$options = array(

// Carousel
			'carousel_background_color' => array(
				'description'       => esc_html__( 'Color scheme.', 'jetpack' ),
				'type'              => 'string',
				'default'           => 'black',
				'enum'              => array(
					'black',
					'white',
				),
				'enum_labels' => array(
					'black' => esc_html__( 'Black', 'jetpack' ),
					'white' => esc_html__( 'White', 'jetpack' ),
				),
				'validate_callback' => __CLASS__ . '::validate_list_item',
				'jp_group'          => 'carousel',
			),
			'carousel_display_exif' => array(
				'description'       => wp_kses( sprintf( __( 'Show photo metadata (<a href="http://en.wikipedia.org/wiki/Exchangeable_image_file_format" target="_blank">Exif</a>) in carousel, when available.', 'jetpack' ) ), array( 'a' => array( 'href' => true, 'target' => true ) ) ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'carousel',
			),

// Comments
			'highlander_comment_form_prompt' => array(
				'description'       => esc_html__( 'Greeting Text', 'jetpack' ),
				'type'              => 'string',
				'default'           => esc_html__( 'Leave a Reply', 'jetpack' ),
				'sanitize_callback' => 'sanitize_text_field',
				'jp_group'          => 'comments',
			),
			'jetpack_comment_form_color_scheme' => array(
				'description'       => esc_html__( "Color scheme", 'jetpack' ),
				'type'              => 'string',
				'default'           => 'light',
				'enum'              => array(
					'light',
					'dark',
					'transparent',
				),
				'enum_labels' => array(
					'light'       => esc_html__( 'Light', 'jetpack' ),
					'dark'        => esc_html__( 'Dark', 'jetpack' ),
					'transparent' => esc_html__( 'Transparent', 'jetpack' ),
				),
				'validate_callback' => __CLASS__ . '::validate_list_item',
				'jp_group'          => 'comments',
			),

// Custom Content Types
			'jetpack_portfolio' => array(
				'description'       => esc_html__( 'Enable or disable Jetpack portfolio post type.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'custom-content-types',
			),
			'jetpack_portfolio_posts_per_page' => array(
				'description'       => esc_html__( 'Number of entries to show at most in Portfolio pages.', 'jetpack' ),
				'type'              => 'integer',
				'default'           => 10,
				'validate_callback' => __CLASS__ . '::validate_posint',
				'jp_group'          => 'custom-content-types',
			),
			'jetpack_testimonial' => array(
				'description'       => esc_html__( 'Enable or disable Jetpack testimonial post type.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'custom-content-types',
			),
			'jetpack_testimonial_posts_per_page' => array(
				'description'       => esc_html__( 'Number of entries to show at most in Testimonial pages.', 'jetpack' ),
				'type'              => 'integer',
				'default'           => 10,
				'validate_callback' => __CLASS__ . '::validate_posint',
				'jp_group'          => 'custom-content-types',
			),

// Galleries
			'tiled_galleries' => array(
				'description'       => esc_html__( 'Display all your gallery pictures in a cool mosaic.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'tiled-gallery',
			),

'gravatar_disable_hovercards' => array(
				'description'       => esc_html__( "View people's profiles when you mouse over their Gravatars", 'jetpack' ),
				'type'              => 'string',
				'default'           => 'enabled',
				// Not visible. This is used as the checkbox value.
				'enum'              => array(
					'enabled',
					'disabled',
				),
				'enum_labels' => array(
					'enabled'  => esc_html__( 'Enabled', 'jetpack' ),
					'disabled' => esc_html__( 'Disabled', 'jetpack' ),
				),
				'validate_callback' => __CLASS__ . '::validate_list_item',
				'jp_group'          => 'gravatar-hovercards',
			),

// Infinite Scroll
			'infinite_scroll' => array(
				'description'       => esc_html__( 'To infinity and beyond', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'infinite-scroll',
			),
			'infinite_scroll_google_analytics' => array(
				'description'       => esc_html__( 'Use Google Analytics with Infinite Scroll', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'infinite-scroll',
			),

// Likes
			'wpl_default' => array(
				'description'       => esc_html__( 'WordPress.com Likes are', 'jetpack' ),
				'type'              => 'string',
				'default'           => 'on',
				'enum'              => array(
					'on',
					'off',
				),
				'enum_labels' => array(
					'on'  => esc_html__( 'On for all posts', 'jetpack' ),
					'off' => esc_html__( 'Turned on per post', 'jetpack' ),
				),
				'validate_callback' => __CLASS__ . '::validate_list_item',
				'jp_group'          => 'likes',
			),
			'social_notifications_like' => array(
				'description'       => esc_html__( 'Send email notification when someone likes a post', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'likes',
			),

// Markdown
			'wpcom_publish_comments_with_markdown' => array(
				'description'       => esc_html__( 'Use Markdown for comments.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'markdown',
			),
			'wpcom_publish_posts_with_markdown' => array(
				'description'       => esc_html__( 'Use Markdown for posts.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'markdown',
			),

// Mobile Theme
			'wp_mobile_excerpt' => array(
				'description'       => esc_html__( 'Excerpts', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'minileven',
			),
			'wp_mobile_featured_images' => array(
				'description'       => esc_html__( 'Featured Images', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'minileven',
			),
			'wp_mobile_app_promos' => array(
				'description'       => esc_html__( 'Show a promo for the WordPress mobile apps in the footer of the mobile theme.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'minileven',
			),

// Monitor
			'monitor_receive_notifications' => array(
				'description'       => esc_html__( 'Receive Monitor Email Notifications.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'monitor',
			),

// Post by Email
			'post_by_email_address' => array(
				'description'       => esc_html__( 'Email Address', 'jetpack' ),
				'type'              => 'string',
				'default'           => 'noop',
				'enum'              => array(
					'noop',
					'create',
					'regenerate',
					'delete',
				),
				'enum_labels' => array(
					'noop'       => '',
					'create'     => esc_html__( 'Create Post by Email address', 'jetpack' ),
					'regenerate' => esc_html__( 'Regenerate Post by Email address', 'jetpack' ),
					'delete'     => esc_html__( 'Delete Post by Email address', 'jetpack' ),
				),
				'validate_callback' => __CLASS__ . '::validate_list_item',
				'jp_group'          => 'post-by-email',
			),

// Protect
			'jetpack_protect_key' => array(
				'description'       => esc_html__( 'Protect API key', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_alphanum',
				'jp_group'          => 'protect',
			),
			'jetpack_protect_global_whitelist' => array(
				'description'       => esc_html__( 'Protect global whitelist', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_string',
				'sanitize_callback' => 'esc_textarea',
				'jp_group'          => 'protect',
			),

// Sharing
			'sharing_services' => array(
				'description'       => esc_html__( 'Enabled Services and those hidden behind a button', 'jetpack' ),
				'type'              => 'object',
				'default'           => array(
					'visible' => array( 'twitter', 'facebook', 'google-plus-1' ),
					'hidden'  => array(),
				),
				'validate_callback' => __CLASS__ . '::validate_services',
				'jp_group'          => 'sharedaddy',
			),
			'button_style' => array(
				'description'       => esc_html__( 'Button Style', 'jetpack' ),
				'type'              => 'string',
				'default'           => 'icon',
				'enum'              => array(
					'icon-text',
					'icon',
					'text',
					'official',
				),
				'enum_labels' => array(
					'icon-text' => esc_html__( 'Icon + text', 'jetpack' ),
					'icon'      => esc_html__( 'Icon only', 'jetpack' ),
					'text'      => esc_html__( 'Text only', 'jetpack' ),
					'official'  => esc_html__( 'Official buttons', 'jetpack' ),
				),
				'validate_callback' => __CLASS__ . '::validate_list_item',
				'jp_group'          => 'sharedaddy',
			),
			'sharing_label' => array(
				'description'       => esc_html__( 'Sharing Label', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_string',
				'sanitize_callback' => 'esc_html',
				'jp_group'          => 'sharedaddy',
			),
			'show' => array(
				'description'       => esc_html__( 'Views where buttons are shown', 'jetpack' ),
				'type'              => 'array',
				'items'             => array(
					'type' => 'string'
				),
				'default'           => array( 'post' ),
				'validate_callback' => __CLASS__ . '::validate_sharing_show',
				'jp_group'          => 'sharedaddy',
			),
			'jetpack-twitter-cards-site-tag' => array(
				'description'       => esc_html__( "The Twitter username of the owner of this site's domain.", 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_twitter_username',
				'sanitize_callback' => 'esc_html',
				'jp_group'          => 'sharedaddy',
			),
			'sharedaddy_disable_resources' => array(
				'description'       => esc_html__( 'Disable CSS and JS', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'sharedaddy',
			),
			'custom' => array(
				'description'       => esc_html__( 'Custom sharing services added by user.', 'jetpack' ),
				'type'              => 'object',
				'default'           => array(
					'sharing_name' => '',
					'sharing_url'  => '',
					'sharing_icon' => '',
				),
				'validate_callback' => __CLASS__ . '::validate_custom_service',
				'jp_group'          => 'sharedaddy',
			),
			// Not an option, but an action that can be perfomed on the list of custom services passing the service ID.
			'sharing_delete_service' => array(
				'description'       => esc_html__( 'Delete custom sharing service.', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_custom_service_id',
				'jp_group'          => 'sharedaddy',
			),

// SSO
			'jetpack_sso_require_two_step' => array(
				'description'       => esc_html__( 'Require Two-Step Authentication', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'sso',
			),
			'jetpack_sso_match_by_email' => array(
				'description'       => esc_html__( 'Match by Email', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'sso',
			),

// Subscriptions
			'stb_enabled' => array(
				'description'       => esc_html__( "Show a <em>'follow blog'</em> option in the comment form", 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'subscriptions',
			),
			'stc_enabled' => array(
				'description'       => esc_html__( "Show a <em>'follow comments'</em> option in the comment form", 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'subscriptions',
			),

// Related Posts
			'show_headline' => array(
				'description'       => esc_html__( 'Show a "Related" header to more clearly separate the related section from posts', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'related-posts',
			),
			'show_thumbnails' => array(
				'description'       => esc_html__( 'Use a large and visually striking layout', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'related-posts',
			),

// Spelling and Grammar - After the Deadline
			'onpublish' => array(
				'description'       => esc_html__( 'Proofread when a post or page is first published.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'onupdate' => array(
				'description'       => esc_html__( 'Proofread when a post or page is updated.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Bias Language' => array(
				'description'       => esc_html__( 'Bias Language', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Cliches' => array(
				'description'       => esc_html__( 'Clichés', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Complex Expression' => array(
				'description'       => esc_html__( 'Complex Phrases', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Diacritical Marks' => array(
				'description'       => esc_html__( 'Diacritical Marks', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Double Negative' => array(
				'description'       => esc_html__( 'Double Negatives', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Hidden Verbs' => array(
				'description'       => esc_html__( 'Hidden Verbs', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Jargon Language' => array(
				'description'       => esc_html__( 'Jargon', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Passive voice' => array(
				'description'       => esc_html__( 'Passive Voice', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Phrases to Avoid' => array(
				'description'       => esc_html__( 'Phrases to Avoid', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'Redundant Expression' => array(
				'description'       => esc_html__( 'Redundant Phrases', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'guess_lang' => array(
				'description'       => esc_html__( 'Use automatically detected language to proofread posts and pages', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'after-the-deadline',
			),
			'ignored_phrases' => array(
				'description'       => esc_html__( 'Add Phrase to be ignored', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'sanitize_callback' => 'esc_html',
				'jp_group'          => 'after-the-deadline',
			),
			'unignore_phrase' => array(
				'description'       => esc_html__( 'Remove Phrase from being ignored', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'sanitize_callback' => 'esc_html',
				'jp_group'          => 'after-the-deadline',
			),

// Verification Tools
			'google' => array(
				'description'       => esc_html__( 'Google Search Console', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_verification_service',
				'jp_group'          => 'verification-tools',
			),
			'bing' => array(
				'description'       => esc_html__( 'Bing Webmaster Center', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_verification_service',
				'jp_group'          => 'verification-tools',
			),
			'pinterest' => array(
				'description'       => esc_html__( 'Pinterest Site Verification', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_verification_service',
				'jp_group'          => 'verification-tools',
			),
			'yandex' => array(
				'description'       => esc_html__( 'Yandex Site Verification', 'jetpack' ),
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_verification_service',
				'jp_group'          => 'verification-tools',
			),
			'enable_header_ad' => array(
				'description'        => esc_html__( 'Display an ad unit at the top of each page.', 'jetpack' ),
				'type'               => 'boolean',
				'default'            => 0,
				'validate_callback'  => __CLASS__ . '::validate_boolean',
				'jp_group'           => 'wordads',
			),
			'wordads_approved' => array(
				'description'        => esc_html__( 'Is site approved for WordAds?', 'jetpack' ),
				'type'               => 'boolean',
				'default'            => 0,
				'validate_callback'  => __CLASS__ . '::validate_boolean',
				'jp_group'           => 'wordads',
			),
			'wordads_second_belowpost' => array(
				'description'        => esc_html__( 'Display second ad below post?', 'jetpack' ),
				'type'               => 'boolean',
				'default'            => 1,
				'validate_callback'  => __CLASS__ . '::validate_boolean',
				'jp_group'           => 'wordads',
			),
			'wordads_display_front_page' => array(
				'description'        => esc_html__( 'Display ads on the front page?', 'jetpack' ),
				'type'               => 'boolean',
				'default'            => 1,
				'validate_callback'  => __CLASS__ . '::validate_boolean',
				'jp_group'           => 'wordads',
			),
			'wordads_display_post' => array(
				'description'        => esc_html__( 'Display ads on posts?', 'jetpack' ),
				'type'               => 'boolean',
				'default'            => 1,
				'validate_callback'  => __CLASS__ . '::validate_boolean',
				'jp_group'           => 'wordads',
			),
			'wordads_display_page' => array(
				'description'        => esc_html__( 'Display ads on pages?', 'jetpack' ),
				'type'               => 'boolean',
				'default'            => 1,
				'validate_callback'  => __CLASS__ . '::validate_boolean',
				'jp_group'           => 'wordads',
			),
			'wordads_display_archive' => array(
				'description'        => esc_html__( 'Display ads on archive pages?', 'jetpack' ),
				'type'               => 'boolean',
				'default'            => 1,
				'validate_callback'  => __CLASS__ . '::validate_boolean',
				'jp_group'           => 'wordads',
			),

// Google Analytics
			'google_analytics_tracking_id' => array(
				'description'        => esc_html__( 'Google Analytics', 'jetpack' ),
				'type'               => 'string',
				'default'            => '',
				'validate_callback'  => __CLASS__ . '::validate_alphanum',
				'jp_group'           => 'google-analytics',
			),

// Stats
			'admin_bar' => array(
				'description'       => esc_html__( 'Put a chart showing 48 hours of views in the admin bar.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'stats',
			),
			'roles' => array(
				'description'       => esc_html__( 'Select the roles that will be able to view stats reports.', 'jetpack' ),
				'type'              => 'array',
				'items'             => array(
					'type' => 'string'
				),
				'default'           => array( 'administrator' ),
				'validate_callback' => __CLASS__ . '::validate_stats_roles',
				'sanitize_callback' => __CLASS__ . '::sanitize_stats_allowed_roles',
				'jp_group'          => 'stats',
			),
			'count_roles' => array(
				'description'       => esc_html__( 'Count the page views of registered users who are logged in.', 'jetpack' ),
				'type'              => 'array',
				'items'             => array(
					'type' => 'string'
				),
				'default'           => array( 'administrator' ),
				'validate_callback' => __CLASS__ . '::validate_stats_roles',
				'jp_group'          => 'stats',
			),
			'blog_id' => array(
				'description'       => esc_html__( 'Blog ID.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'stats',
			),
			'do_not_track' => array(
				'description'       => esc_html__( 'Do not track.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'stats',
			),
			'hide_smile' => array(
				'description'       => esc_html__( 'Hide the stats smiley face image.', 'jetpack' ),
				'type'              => 'boolean',
				'default'           => 1,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'stats',
			),
			'version' => array(
				'description'       => esc_html__( 'Version.', 'jetpack' ),
				'type'              => 'integer',
				'default'           => 9,
				'validate_callback' => __CLASS__ . '::validate_posint',
				'jp_group'          => 'stats',
			),

// Settings - Not a module
			self::holiday_snow_option_name() => array(
				'description'       => '',
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'settings',
			),

// Akismet - Not a module, but a plugin. The options can be passed and handled differently.
			'akismet_show_user_comments_approved' => array(
				'description'       => '',
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'settings',
			),

'wordpress_api_key' => array(
				'description'       => '',
				'type'              => 'string',
				'default'           => '',
				'validate_callback' => __CLASS__ . '::validate_alphanum',
				'jp_group'          => 'settings',
			),

// Apps card on dashboard
			'dismiss_dash_app_card' => array(
				'description'       => '',
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'settings',
			),

// Empty stats card dismiss
			'dismiss_empty_stats_card' => array(
				'description'       => '',
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'settings',
			),

'onboarding' => array(
				'description'       => '',
				'type'              => 'object',
				'default'           => array(
					'token'            => '',
					'siteTitle'        => '',
					'siteDescription'  => '',
					'genre'            => 'blog',
					'businessPersonal' => 'personal',
					'businessInfo'     => array(
						'businessName'     => '',
						'businessAddress'  => '',
						'businessCity'     => '',
						'businessState'    => '',
						'businessZipCode'  => '',
					),
					'homepageFormat'   => 'news',
					'addContactForm'   => false,
					'end'              => false,
				),
				'validate_callback' => __CLASS__ . '::validate_onboarding',
				'jp_group'          => 'settings',
			),

// Show welcome for newly purchased plan
			'show_welcome_for_new_plan' => array(
				'description'       => '',
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'settings',
			),

);

// Add modules to list so they can be toggled
		$modules = Jetpack::get_available_modules();
		if ( is_array( $modules ) && ! empty( $modules ) ) {
			$module_args = array(
				'description'       => '',
				'type'              => 'boolean',
				'default'           => 0,
				'validate_callback' => __CLASS__ . '::validate_boolean',
				'jp_group'          => 'modules',
			);
			foreach( $modules as $module ) {
				$options[ $module ] = $module_args;
			}
		}

if ( is_array( $selector ) ) {

// Return only those options whose keys match $selector keys
			return array_intersect_key( $options, $selector );
		}

if ( 'any' === $selector ) {

// Toggle module or update any module option or any general setting
			return $options;
		}

// We're updating the options for a single module.
		if ( empty( $selector ) ) {
			$selector = self::get_module_requested();
		}
		$selected = array();
		foreach ( $options as $option => $attributes ) {

// Not adding an isset( $attributes['jp_group'] ) because if it's not set, it must be fixed, otherwise options will fail.
			if ( $selector === $attributes['jp_group'] ) {
				$selected[ $option ] = $attributes;
			}
		}
		return $selected;
	}

/**
	 * Validates that the parameters are proper values that can be set during Jetpack onboarding.
	 *
	 * @since 5.4.0
	 *
	 * @param array           $onboarding_data Values to check.
	 * @param WP_REST_Request $request         The request sent to the WP REST API.
	 * @param string          $param           Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_onboarding( $onboarding_data, $request, $param ) {
		if ( ! is_array( $onboarding_data ) ) {
			return new WP_Error( 'invalid_param', esc_html__( 'Not valid onboarding data.', 'jetpack' ) );
		}
		foreach ( $onboarding_data as $value ) {
			if ( is_string( $value ) ) {
				$onboarding_choice = self::validate_string( $value, $request, $param );
			} elseif ( is_array( $value ) ) {
				$onboarding_choice = self::validate_onboarding( $value, $request, $param );
			} else {
				$onboarding_choice = self::validate_boolean( $value, $request, $param );
			}
			if ( is_wp_error( $onboarding_choice ) ) {
				return $onboarding_choice;
			}
		}
		return true;
	}

/**
	 * Validates that the parameter is either a pure boolean or a numeric string that can be mapped to a boolean.
	 *
	 * @since 4.3.0
	 *
	 * @param string|bool $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_boolean( $value, $request, $param ) {
		if ( ! is_bool( $value ) && ! ( ( ctype_digit( $value ) || is_numeric( $value ) ) && in_array( $value, array( 0, 1 ) ) ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be true, false, 0 or 1.', 'jetpack' ), $param ) );
		}
		return true;
	}

/**
	 * Validates that the parameter is a positive integer.
	 *
	 * @since 4.3.0
	 *
	 * @param int $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_posint( $value = 0, $request, $param ) {
		if ( ! is_numeric( $value ) || $value <= 0 ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be a positive integer.', 'jetpack' ), $param ) );
		}
		return true;
	}

/**
	 * Validates that the parameter belongs to a list of admitted values.
	 *
	 * @since 4.3.0
	 *
	 * @param string $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_list_item( $value = '', $request, $param ) {
		$attributes = $request->get_attributes();
		if ( ! isset( $attributes['args'][ $param ] ) || ! is_array( $attributes['args'][ $param ] ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s not recognized', 'jetpack' ), $param ) );
		}
		$args = $attributes['args'][ $param ];
		if ( ! empty( $args['enum'] ) ) {

// If it's an associative array, use the keys to check that the value is among those admitted.
			$enum = ( count( array_filter( array_keys( $args['enum'] ), 'is_string' ) ) > 0 ) ? array_keys( $args['enum'] ) : $args['enum'];
			if ( ! in_array( $value, $enum ) ) {
				return new WP_Error( 'invalid_param_value', sprintf(
					/* Translators: first variable is the parameter passed to endpoint that holds the list item, the second is a list of admitted values. */
					esc_html__( '%1$s must be one of %2$s', 'jetpack' ), $param, implode( ', ', $enum )
				) );
			}
		}
		return true;
	}

/**
	 * Validates that the parameter belongs to a list of admitted values.
	 *
	 * @since 4.3.0
	 *
	 * @param string $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_module_list( $value = '', $request, $param ) {
		if ( ! is_array( $value ) ) {
			return new WP_Error( 'invalid_param_value', sprintf( esc_html__( '%s must be an array', 'jetpack' ), $param ) );
		}

$modules = Jetpack::get_available_modules();

if ( count( array_intersect( $value, $modules ) ) != count( $value ) ) {
			return new WP_Error( 'invalid_param_value', sprintf( esc_html__( '%s must be a list of valid modules', 'jetpack' ), $param ) );
		}

return true;
	}

/**
	 * Validates that the parameter is an alphanumeric or empty string (to be able to clear the field).
	 *
	 * @since 4.3.0
	 *
	 * @param string $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_alphanum( $value = '', $request, $param ) {
		if ( ! empty( $value ) && ( ! is_string( $value ) || ! preg_match( '/^[a-z0-9]+$/i', $value ) ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be an alphanumeric string.', 'jetpack' ), $param ) );
		}
		return true;
	}

/**
	 * Validates that the parameter is a tag or id for a verification service, or an empty string (to be able to clear the field).
	 *
	 * @since 4.6.0
	 *
	 * @param string $value Value to check.
	 * @param WP_REST_Request $request
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_verification_service( $value = '', $request, $param ) {
		if ( ! empty( $value ) && ! ( is_string( $value ) && ( preg_match( '/^[a-z0-9_-]+$/i', $value ) || preg_match( '#^<meta name="([a-z0-9_\-.:]+)?" content="([a-z0-9_-]+)?" />$#i', $value ) ) ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be an alphanumeric string or a verification tag.', 'jetpack' ), $param ) );
		}
		return true;
	}

/**
	 * Validates that the parameter is among the roles allowed for Stats.
	 *
	 * @since 4.3.0
	 *
	 * @param string|bool $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_stats_roles( $value, $request, $param ) {
		if ( ! empty( $value ) && ! array_intersect( self::$stats_roles, $value ) ) {
			return new WP_Error( 'invalid_param', sprintf(
				/* Translators: first variable is the name of a parameter passed to endpoint holding the role that will be checked, the second is a list of roles allowed to see stats. The parameter is checked against this list. */
				esc_html__( '%1$s must be %2$s.', 'jetpack' ), $param, join( ', ', self::$stats_roles )
			) );
		}
		return true;
	}

/**
	 * Validates that the parameter is among the views where the Sharing can be displayed.
	 *
	 * @since 4.3.0
	 *
	 * @param string|bool $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_sharing_show( $value, $request, $param ) {
		$views = array( 'index', 'post', 'page', 'attachment', 'jetpack-portfolio' );
		if ( ! is_array( $value ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be an array of post types.', 'jetpack' ), $param ) );
		}
		if ( ! array_intersect( $views, $value ) ) {
			return new WP_Error( 'invalid_param', sprintf(
				/* Translators: first variable is the name of a parameter passed to endpoint holding the post type where Sharing will be displayed, the second is a list of post types where Sharing can be displayed */
				esc_html__( '%1$s must be %2$s.', 'jetpack' ), $param, join( ', ', $views )
			) );
		}
		return true;
	}

/**
	 * Validates that the parameter is among the views where the Sharing can be displayed.
	 *
	 * @since 4.3.0
	 *
	 * @param string|bool $value {
	 *     Value to check received by request.
	 *
	 *     @type array $visible List of slug of services to share to that are displayed directly in the page.
	 *     @type array $hidden  List of slug of services to share to that are concealed in a folding menu.
	 * }
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_services( $value, $request, $param ) {
		if ( ! is_array( $value ) || ! isset( $value['visible'] ) || ! isset( $value['hidden'] ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be an array with visible and hidden items.', 'jetpack' ), $param ) );
		}

// Allow to clear everything.
		if ( empty( $value['visible'] ) && empty( $value['hidden'] ) ) {
			return true;
		}

if ( ! class_exists( 'Sharing_Service' ) && ! include_once( JETPACK__PLUGIN_DIR . 'modules/sharedaddy/sharing-service.php' ) ) {
			return new WP_Error( 'invalid_param', esc_html__( 'Failed loading required dependency Sharing_Service.', 'jetpack' ) );
		}
		$sharer = new Sharing_Service();
		$services = array_keys( $sharer->get_all_services() );

if (
			( ! empty( $value['visible'] ) && ! array_intersect( $value['visible'], $services ) )
			||
			( ! empty( $value['hidden'] ) && ! array_intersect( $value['hidden'], $services ) ) )
		{
			return new WP_Error( 'invalid_param', sprintf(
				/* Translators: placeholder 1 is a parameter holding the services passed to endpoint, placeholder 2 is a list of all Jetpack Sharing services */
				esc_html__( '%1$s visible and hidden items must be a list of %2$s.', 'jetpack' ), $param, join( ', ', $services )
			) );
		}
		return true;
	}

/**
	 * Validates that the parameter has enough information to build a custom sharing button.
	 *
	 * @since 4.3.0
	 *
	 * @param string|bool $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_custom_service( $value, $request, $param ) {
		if ( ! is_array( $value ) || ! isset( $value['sharing_name'] ) || ! isset( $value['sharing_url'] ) || ! isset( $value['sharing_icon'] ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be an array with sharing name, url and icon.', 'jetpack' ), $param ) );
		}

// Allow to clear everything.
		if ( empty( $value['sharing_name'] ) && empty( $value['sharing_url'] ) && empty( $value['sharing_icon'] ) ) {
			return true;
		}

if ( ( ! empty( $value['sharing_name'] ) && ! is_string( $value['sharing_name'] ) )
		|| ( ! empty( $value['sharing_url'] ) && ! is_string( $value['sharing_url'] ) )
		|| ( ! empty( $value['sharing_icon'] ) && ! is_string( $value['sharing_icon'] ) ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s needs sharing name, url and icon.', 'jetpack' ), $param ) );
		}
		return true;
	}

/**
	 * Validates that the parameter is a custom sharing service ID like 'custom-1461976264'.
	 *
	 * @since 4.3.0
	 *
	 * @param string $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_custom_service_id( $value = '', $request, $param ) {
		if ( ! empty( $value ) && ( ! is_string( $value ) || ! preg_match( '/custom\-[0-1]+/i', $value ) ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( "%s must be a string prefixed with 'custom-' and followed by a numeric ID.", 'jetpack' ), $param ) );
		}

if ( ! empty( $value ) && ! in_array( $value, $services ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s is not a registered custom sharing service.', 'jetpack' ), $param ) );
		}

return true;
	}

/**
	 * Validates that the parameter is a Twitter username or empty string (to be able to clear the field).
	 *
	 * @since 4.3.0
	 *
	 * @param string $value Value to check.
	 * @param WP_REST_Request $request
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_twitter_username( $value = '', $request, $param ) {
		if ( ! empty( $value ) && ( ! is_string( $value ) || ! preg_match( '/^@?\w{1,15}$/i', $value ) ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be a Twitter username.', 'jetpack' ), $param ) );
		}
		return true;
	}

/**
	 * Validates that the parameter is a string.
	 *
	 * @since 4.3.0
	 *
	 * @param string $value Value to check.
	 * @param WP_REST_Request $request The request sent to the WP REST API.
	 * @param string $param Name of the parameter passed to endpoint holding $value.
	 *
	 * @return bool|WP_Error
	 */
	public static function validate_string( $value = '', $request, $param ) {
		if ( ! is_string( $value ) ) {
			return new WP_Error( 'invalid_param', sprintf( esc_html__( '%s must be a string.', 'jetpack' ), $param ) );
		}
		return true;
	}

/**
	 * If for some reason the roles allowed to see Stats are empty (for example, user tampering with checkboxes),
	 * return an array with only 'administrator' as the allowed role and save it for 'roles' option.
	 *
	 * @since 4.3.0
	 *
	 * @param string|bool $value Value to check.
	 *
	 * @return bool|array
	 */
	public static function sanitize_stats_allowed_roles( $value ) {
		if ( empty( $value ) ) {
			return array( 'administrator' );
		}
		return $value;
	}

/**
	 * Get the currently accessed route and return the module slug in it.
	 *
	 * @since 4.3.0
	 *
	 * @param string $route Regular expression for the endpoint with the module slug to return.
	 *
	 * @return array|string
	 */
	public static function get_module_requested( $route = '/module/(?P<slug>[a-z\-]+)' ) {

if ( empty( $GLOBALS['wp']->query_vars['rest_route'] ) ) {
			return '';
		}

preg_match( "#$route#", $GLOBALS['wp']->query_vars['rest_route'], $module );

if ( empty( $module['slug'] ) ) {
			return '';
		}

return $module['slug'];
	}

/**
	 * Adds extra information for modules.
	 *
	 * @since 4.3.0
	 *
	 * @param string|array $modules Can be a single module or a list of modules.
	 * @param null|string  $slug    Slug of the module in the first parameter.
	 *
	 * @return array|string
	 */
	public static function prepare_modules_for_response( $modules = '', $slug = null ) {
		global $wp_rewrite;

/** This filter is documented in modules/sitemaps/sitemaps.php */
		$location = apply_filters( 'jetpack_sitemap_location', '' );

if ( $wp_rewrite->using_index_permalinks() ) {
			$sitemap_url = home_url( '/index.php' . $location . '/sitemap.xml' );
			$news_sitemap_url = home_url( '/index.php' . $location . '/news-sitemap.xml' );
		} else if ( $wp_rewrite->using_permalinks() ) {
			$sitemap_url = home_url( $location . '/sitemap.xml' );
			$news_sitemap_url = home_url( $location . '/news-sitemap.xml' );
		} else {
			$sitemap_url = home_url( $location . '/?jetpack-sitemap=sitemap.xml' );
			$news_sitemap_url = home_url( $location . '/?jetpack-sitemap=news-sitemap.xml' );
		}

if ( is_null( $slug ) && isset( $modules['sitemaps'] ) ) {
			// Is a list of modules
			$modules['sitemaps']['extra']['sitemap_url'] = $sitemap_url;
			$modules['sitemaps']['extra']['news_sitemap_url'] = $news_sitemap_url;
		} elseif ( 'sitemaps' == $slug ) {
			// It's a single module
			$modules['extra']['sitemap_url'] = $sitemap_url;
			$modules['extra']['news_sitemap_url'] = $news_sitemap_url;
		}
		return $modules;
	}

/**
	 * Remove 'validate_callback' item from options available for module.
	 * Fetch current option value and add to array of module options.
	 * Prepare values of module options that need special handling, like those saved in wpcom.
	 *
	 * @since 4.3.0
	 *
	 * @param string $module Module slug.
	 * @return array
	 */
	public static function prepare_options_for_response( $module = '' ) {
		$options = self::get_updateable_data_list( $module );

if ( ! is_array( $options ) || empty( $options ) ) {
			return $options;
		}

foreach ( $options as $key => $value ) {

if ( isset( $options[ $key ]['validate_callback'] ) ) {
				unset( $options[ $key ]['validate_callback'] );
			}

$default_value = isset( $options[ $key ]['default'] ) ? $options[ $key ]['default'] : '';

$current_value = get_option( $key, $default_value );

$options[ $key ]['current_value'] = self::cast_value( $current_value, $options[ $key ] );
		}

// Some modules need special treatment.
		switch ( $module ) {

case 'monitor':
				// Status of user notifications
				$options['monitor_receive_notifications']['current_value'] = self::cast_value( self::get_remote_value( 'monitor', 'monitor_receive_notifications' ), $options['monitor_receive_notifications'] );
				break;

case 'post-by-email':
				// Email address
				$options['post_by_email_address']['current_value'] = self::cast_value( self::get_remote_value( 'post-by-email', 'post_by_email_address' ), $options['post_by_email_address'] );
				break;

case 'protect':
				// Protect
				$options['jetpack_protect_key']['current_value'] = get_site_option( 'jetpack_protect_key', false );
				if ( ! function_exists( 'jetpack_protect_format_whitelist' ) ) {
					include_once( JETPACK__PLUGIN_DIR . 'modules/protect/shared-functions.php' );
				}
				$options['jetpack_protect_global_whitelist']['current_value'] = jetpack_protect_format_whitelist();
				break;

case 'related-posts':
				// It's local, but it must be broken apart since it's saved as an array.
				$options = self::split_options( $options, Jetpack_Options::get_option( 'relatedposts' ) );
				break;

case 'verification-tools':
				// It's local, but it must be broken apart since it's saved as an array.
				$options = self::split_options( $options, get_option( 'verification_services_codes' ) );
				break;

case 'google-analytics':
				$wga = get_option( 'jetpack_wga' );
				$code = '';
				if ( is_array( $wga ) && array_key_exists( 'code', $wga ) ) {
					 $code = $wga[ 'code' ];
				}
				$options[ 'google_analytics_tracking_id' ][ 'current_value' ] = $code;
				break;

case 'sharedaddy':
				// It's local, but it must be broken apart since it's saved as an array.
				if ( ! class_exists( 'Sharing_Service' ) && ! include_once( JETPACK__PLUGIN_DIR . 'modules/sharedaddy/sharing-service.php' ) ) {
					break;
				}
				$sharer = new Sharing_Service();
				$options = self::split_options( $options, $sharer->get_global_options() );
				$options['sharing_services']['current_value'] = $sharer->get_blog_services();
				break;

case 'after-the-deadline':
				if ( ! function_exists( 'AtD_get_options' ) ) {
					include_once( JETPACK__PLUGIN_DIR . 'modules/after-the-deadline.php' );
				}
				$atd_options = array_merge( AtD_get_options( get_current_user_id(), 'AtD_options' ), AtD_get_options( get_current_user_id(), 'AtD_check_when' ) );
				unset( $atd_options['name'] );
				foreach ( $atd_options as $key => $value ) {
					$options[ $key ]['current_value'] = self::cast_value( $value, $options[ $key ] );
				}
				$atd_options = AtD_get_options( get_current_user_id(), 'AtD_guess_lang' );
				$options['guess_lang']['current_value'] = self::cast_value( isset( $atd_options['true'] ), $options[ 'guess_lang' ] );
				$options['ignored_phrases']['current_value'] = AtD_get_setting( get_current_user_id(), 'AtD_ignored_phrases' );
				unset( $options['unignore_phrase'] );
				break;

case 'stats':
				// It's local, but it must be broken apart since it's saved as an array.
				if ( ! function_exists( 'stats_get_options' ) ) {
					include_once( JETPACK__PLUGIN_DIR . 'modules/stats.php' );
				}
				$options = self::split_options( $options, stats_get_options() );
				break;
		}

return $options;
	}

/**
	 * Splits module options saved as arrays like relatedposts or verification_services_codes into separate options to be returned in the response.
	 *
	 * @since 4.3.0
	 *
	 * @param array  $separate_options Array of options admitted by the module.
	 * @param array  $grouped_options Option saved as array to be splitted.
	 * @param string $prefix Optional prefix for the separate option keys.
	 *
	 * @return array
	 */
	public static function split_options( $separate_options, $grouped_options, $prefix = '' ) {
		if ( is_array( $grouped_options ) ) {
			foreach ( $grouped_options as $key => $value ) {
				$option_key = $prefix . $key;
				if ( isset( $separate_options[ $option_key ] ) ) {
					$separate_options[ $option_key ]['current_value'] = self::cast_value( $grouped_options[ $key ], $separate_options[ $option_key ] );
				}
			}
		}
		return $separate_options;
	}

/**
	 * Perform a casting to the value specified in the option definition.
	 *
	 * @since 4.3.0
	 *
	 * @param mixed $value Value to cast to the proper type.
	 * @param array $definition Type to cast the value to.
	 *
	 * @return bool|float|int|string
	 */
	public static function cast_value( $value, $definition ) {
		if ( $value === 'NULL' ) {
			return null;
		}

if ( isset( $definition['type'] ) ) {
			switch ( $definition['type'] ) {
				case 'boolean':
					if ( 'true' === $value ) {
						return true;
					} elseif ( 'false' === $value ) {
						return false;
					}
					return (bool) $value;
					break;

case 'integer':
					return (int) $value;
					break;

case 'float':
					return (float) $value;
					break;

case 'string':
					return (string) $value;
					break;
			}
		}
		return $value;
	}

/**
	 * Get a value not saved locally.
	 *
	 * @since 4.3.0
	 *
	 * @param string $module Module slug.
	 * @param string $option Option name.
	 *
	 * @return bool Whether user is receiving notifications or not.
	 */
	public static function get_remote_value( $module, $option ) {

if ( in_array( $module, array( 'post-by-email' ), true ) ) {
			$option .= get_current_user_id();
		}

// If option doesn't exist, 'does_not_exist' will be returned.
		$value = get_option( $option, 'does_not_exist' );

// If option exists, just return it.
		if ( 'does_not_exist' !== $value ) {
			return $value;
		}

// Only check a remote option if Jetpack is connected.
		if ( ! Jetpack::is_active() ) {
			return false;
		}

// Do what is necessary for each module.
		switch ( $module ) {
			case 'monitor':
				// Load the class to use the method. If class can't be found, do nothing.
				if ( ! class_exists( 'Jetpack_Monitor' ) && ! include_once( Jetpack::get_module_path( $module ) ) ) {
					return false;
				}
				$value = Jetpack_Monitor::user_receives_notifications( false );
				break;

case 'post-by-email':
				// Load the class to use the method. If class can't be found, do nothing.
				if ( ! class_exists( 'Jetpack_Post_By_Email' ) && ! include_once( Jetpack::get_module_path( $module ) ) ) {
					return false;
				}
				$post_by_email = new Jetpack_Post_By_Email();
				$value = $post_by_email->get_post_by_email_address();
				if ( $value === null ) {
					$value = 'NULL'; // sentinel value so it actually gets set
				}
				break;
		}

// Normalize value to boolean.
		if ( is_wp_error( $value ) || is_null( $value ) ) {
			$value = false;
		}

// Save option to use it next time.
		update_option( $option, $value );

return $value;
	}

/**
	 * Get number of plugin updates available.
	 *
	 * @since 4.3.0
	 *
	 * @return mixed|WP_Error Number of plugin updates available. Otherwise, a WP_Error instance with the corresponding error.
	 */
	public static function get_plugin_update_count() {
		$updates = wp_get_update_data();
		if ( isset( $updates['counts'] ) && isset( $updates['counts']['plugins'] ) ) {
			$count = $updates['counts']['plugins'];
			if ( 0 == $count ) {
				$response = array(
					'code'    => 'success',
					'message' => esc_html__( 'All plugins are up-to-date. Keep up the good work!', 'jetpack' ),
					'count'   => 0,
				);
			} else {
				$response = array(
					'code'    => 'updates-available',
					'message' => esc_html( sprintf( _n( '%s plugin need updating.', '%s plugins need updating.', $count, 'jetpack' ), $count ) ),
					'count'   => $count,
				);
			}
			return rest_ensure_response( $response );
		}

return new WP_Error( 'not_found', esc_html__( 'Could not check updates for plugins on this site.', 'jetpack' ), array( 'status' => 404 ) );
	}

/**
	 * Returns a list of all plugins in the site.
	 *
	 * @since 4.2.0
	 * @uses get_plugins()
	 *
	 * @return array
	 */
	private static function core_get_plugins() {
		if ( ! function_exists( 'get_plugins' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}
		/** This filter is documented in wp-admin/includes/class-wp-plugins-list-table.php */
		$plugins = apply_filters( 'all_plugins', get_plugins() );

if ( is_array( $plugins ) && ! empty( $plugins ) ) {
			foreach ( $plugins as $plugin_slug => $plugin_data ) {
				$plugins[ $plugin_slug ]['active'] = self::core_is_plugin_active( $plugin_slug );
			}
			return $plugins;
		}

return array();
	}

/**
	 * Checks if the queried plugin is active.
	 *
	 * @since 4.2.0
	 * @uses is_plugin_active()
	 *
	 * @return bool
	 */
	private static function core_is_plugin_active( $plugin ) {
		if ( ! function_exists( 'is_plugin_active' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}

return is_plugin_active( $plugin );
	}

/**
	 * Get plugins data in site.
	 *
	 * @since 4.2.0
	 *
	 * @return WP_REST_Response|WP_Error List of plugins in the site. Otherwise, a WP_Error instance with the corresponding error.
	 */
	public static function get_plugins() {
		$plugins = self::core_get_plugins();

if ( ! empty( $plugins ) ) {
			return rest_ensure_response( $plugins );
		}

return new WP_Error( 'not_found', esc_html__( 'Unable to list plugins.', 'jetpack' ), array( 'status' => 404 ) );
	}

/**
	 * Get data about the queried plugin. Currently it only returns whether the plugin is active or not.
	 *
	 * @since 4.2.0
	 *
	 * @param WP_REST_Request $request {
	 *     Array of parameters received by request.
	 *
	 *     @type string $slug Plugin slug with the syntax 'plugin-directory/plugin-main-file.php'.
	 * }
	 *
	 * @return bool|WP_Error True if module was activated. Otherwise, a WP_Error instance with the corresponding error.
	 */
	public static function get_plugin( $request ) {

$plugins = self::core_get_plugins();

if ( empty( $plugins ) ) {
			return new WP_Error( 'no_plugins_found', esc_html__( 'This site has no plugins.', 'jetpack' ), array( 'status' => 404 ) );
		}

$plugin = stripslashes( $request['plugin'] );

if ( ! in_array( $plugin, array_keys( $plugins ) ) ) {
			return new WP_Error( 'plugin_not_found', esc_html( sprintf( __( 'Plugin %s is not installed.', 'jetpack' ), $plugin ) ), array( 'status' => 404 ) );
		}

$plugin_data = $plugins[ $plugin ];

$plugin_data['active'] = self::core_is_plugin_active( $plugin );

return rest_ensure_response( array(
			'code'    => 'success',
			'message' => esc_html__( 'Plugin found.', 'jetpack' ),
			'data'    => $plugin_data
		) );
	}

} // class end

Editing: class.core-rest-api-endpoints.php

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