<?php

/**

 * REST API: WP_REST_Site_Health_Controller class

 *

 * @package WordPress

 * @subpackage REST_API

 * @since 5.6.0

 */

/**

 * Core class for interacting with Site Health tests.

 *

 * @since 5.6.0

 *

 * @see WP_REST_Controller

 */

class WP_REST_Site_Health_Controller extends WP_REST_Controller {

	/**

	 * An instance of the site health class.

	 *

	 * @since 5.6.0

	 *

	 * @var WP_Site_Health

	 */

	private $site_health;

	/**

	 * Site Health controller constructor.

	 *

	 * @since 5.6.0

	 *

	 * @param WP_Site_Health $site_health An instance of the site health class.

	 */

	public function __construct( $site_health ) {

		$this->namespace = 'wp-site-health/v1';

		$this->rest_base = 'tests';

		$this->site_health = $site_health;

	}

	/**

	 * Registers API routes.

	 *

	 * @since 5.6.0

	 *

	 * @see register_rest_route()

	 */

	public function register_routes() {

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s/%s',

				$this->rest_base,

				'background-updates'

			),

			array(

				array(

					'methods'             => 'GET',

					'callback'            => array( $this, 'test_background_updates' ),

					'permission_callback' => function () {

						return $this->validate_request_permission( 'background_updates' );

					},

				),

				'schema' => array( $this, 'get_public_item_schema' ),

			)

		);

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s/%s',

				$this->rest_base,

				'loopback-requests'

			),

			array(

				array(

					'methods'             => 'GET',

					'callback'            => array( $this, 'test_loopback_requests' ),

					'permission_callback' => function () {

						return $this->validate_request_permission( 'loopback_requests' );

					},

				),

				'schema' => array( $this, 'get_public_item_schema' ),

			)

		);

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s/%s',

				$this->rest_base,

				'https-status'

			),

			array(

				array(

					'methods'             => 'GET',

					'callback'            => array( $this, 'test_https_status' ),

					'permission_callback' => function () {

						return $this->validate_request_permission( 'https_status' );

					},

				),

				'schema' => array( $this, 'get_public_item_schema' ),

			)

		);

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s/%s',

				$this->rest_base,

				'dotorg-communication'

			),

			array(

				array(

					'methods'             => 'GET',

					'callback'            => array( $this, 'test_dotorg_communication' ),

					'permission_callback' => function () {

						return $this->validate_request_permission( 'dotorg_communication' );

					},

				),

				'schema' => array( $this, 'get_public_item_schema' ),

			)

		);

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s/%s',

				$this->rest_base,

				'authorization-header'

			),

			array(

				array(

					'methods'             => 'GET',

					'callback'            => array( $this, 'test_authorization_header' ),

					'permission_callback' => function () {

						return $this->validate_request_permission( 'authorization_header' );

					},

				),

				'schema' => array( $this, 'get_public_item_schema' ),

			)

		);

		register_rest_route(

			$this->namespace,

			sprintf(

				'/%s',

				'directory-sizes'

			),

			array(

				'methods'             => 'GET',

				'callback'            => array( $this, 'get_directory_sizes' ),

				'permission_callback' => function() {

					return $this->validate_request_permission( 'debug_enabled' ) && ! is_multisite();

				},

			)

		);

	}

	/**

	 * Validates if the current user can request this REST endpoint.

	 *

	 * @since 5.6.0

	 *

	 * @param string $check The endpoint check being ran.

	 * @return bool

	 */

	protected function validate_request_permission( $check ) {

		$default_capability = 'view_site_health_checks';

		/**

		 * Filters the capability needed to run a given Site Health check.

		 *

		 * @since 5.6.0

		 *

		 * @param string $default_capability The default capability required for this check.

		 * @param string $check              The Site Health check being performed.

		 */

		$capability = apply_filters( "site_health_test_rest_capability_{$check}", $default_capability, $check );

		return current_user_can( $capability );

	}

	/**

	 * Checks if background updates work as expected.

	 *

	 * @since 5.6.0

	 *

	 * @return array

	 */

	public function test_background_updates() {

		$this->load_admin_textdomain();

		return $this->site_health->get_test_background_updates();

	}

	/**

	 * Checks that the site can reach the WordPress.org API.

	 *

	 * @since 5.6.0

	 *

	 * @return array

	 */

	public function test_dotorg_communication() {

		$this->load_admin_textdomain();

		return $this->site_health->get_test_dotorg_communication();

	}

	/**

	 * Checks that loopbacks can be performed.

	 *

	 * @since 5.6.0

	 *

	 * @return array

	 */

	public function test_loopback_requests() {

		$this->load_admin_textdomain();

		return $this->site_health->get_test_loopback_requests();

	}

	/**

	 * Checks that the site's frontend can be accessed over HTTPS.

	 *

	 * @since 5.7.0

	 *

	 * @return array

	 */

	public function test_https_status() {

		$this->load_admin_textdomain();

		return $this->site_health->get_test_https_status();

	}

	/**

	 * Checks that the authorization header is valid.

	 *

	 * @since 5.6.0

	 *

	 * @return array

	 */

	public function test_authorization_header() {

		$this->load_admin_textdomain();

		return $this->site_health->get_test_authorization_header();

	}

	/**

	 * Gets the current directory sizes for this install.

	 *

	 * @since 5.6.0

	 *

	 * @return array|WP_Error

	 */

	public function get_directory_sizes() {

		if ( ! class_exists( 'WP_Debug_Data' ) ) {

			require_once ABSPATH . 'wp-admin/includes/class-wp-debug-data.php';

		}

		$this->load_admin_textdomain();

		$sizes_data = WP_Debug_Data::get_sizes();

		$all_sizes  = array( 'raw' => 0 );

		foreach ( $sizes_data as $name => $value ) {

			$name = sanitize_text_field( $name );

			$data = array();

			if ( isset( $value['size'] ) ) {

				if ( is_string( $value['size'] ) ) {

					$data['size'] = sanitize_text_field( $value['size'] );

				} else {

					$data['size'] = (int) $value['size'];

				}

			}

			if ( isset( $value['debug'] ) ) {

				if ( is_string( $value['debug'] ) ) {

					$data['debug'] = sanitize_text_field( $value['debug'] );

				} else {

					$data['debug'] = (int) $value['debug'];

				}

			}

			if ( ! empty( $value['raw'] ) ) {

				$data['raw'] = (int) $value['raw'];

			}

			$all_sizes[ $name ] = $data;

		}

		if ( isset( $all_sizes['total_size']['debug'] ) && 'not available' === $all_sizes['total_size']['debug'] ) {

			return new WP_Error( 'not_available', __( 'Directory sizes could not be returned.' ), array( 'status' => 500 ) );

		}

		return $all_sizes;

	}

	/**

	 * Loads the admin textdomain for Site Health tests.

	 *

	 * The {@see WP_Site_Health} class is defined in WP-Admin, while the REST API operates in a front-end context.

	 * This means that the translations for Site Health won't be loaded by default in {@see load_default_textdomain()}.

	 *

	 * @since 5.6.0

	 */

	protected function load_admin_textdomain() {

		// Accounts for inner REST API requests in the admin.

		if ( ! is_admin() ) {

			$locale = determine_locale();

			load_textdomain( 'default', WP_LANG_DIR . "/admin-$locale.mo" );

		}

	}

	/**

	 * Gets the schema for each site health test.

	 *

	 * @since 5.6.0

	 *

	 * @return array The test schema.

	 */

	public function get_item_schema() {

		if ( $this->schema ) {

			return $this->schema;

		}

		$this->schema = array(

			'$schema'    => 'http://json-schema.org/draft-04/schema#',

			'title'      => 'wp-site-health-test',

			'type'       => 'object',

			'properties' => array(

				'test'        => array(

					'type'        => 'string',

					'description' => __( 'The name of the test being run.' ),

					'readonly'    => true,

				),

				'label'       => array(

					'type'        => 'string',

					'description' => __( 'A label describing the test.' ),

					'readonly'    => true,

				),

				'status'      => array(

					'type'        => 'string',

					'description' => __( 'The status of the test.' ),

					'enum'        => array( 'good', 'recommended', 'critical' ),

					'readonly'    => true,

				),

				'badge'       => array(

					'type'        => 'object',

					'description' => __( 'The category this test is grouped in.' ),

					'properties'  => array(

						'label' => array(

							'type'     => 'string',

							'readonly' => true,

						),

						'color' => array(

							'type'     => 'string',

							'enum'     => array( 'blue', 'orange', 'red', 'green', 'purple', 'gray' ),

							'readonly' => true,

						),

					),

					'readonly'    => true,

				),

				'description' => array(

					'type'        => 'string',

					'description' => __( 'A more descriptive explanation of what the test looks for, and why it is important for the user.' ),

					'readonly'    => true,

				),

				'actions'     => array(

					'type'        => 'string',

					'description' => __( 'HTML containing an action to direct the user to where they can resolve the issue.' ),

					'readonly'    => true,

				),

			),

		);

		return $this->schema;

	}

}