<?php
/**
 * Jetpack XMLRPC Methods.
 *
 * Registers the Jetpack specific XMLRPC methods
 *
 * @package jetpack
 */

use Automattic\Jetpack\Connection\Manager as Connection_Manager;
use Automattic\Jetpack\Connection\Tokens;

/**
 * XMLRPC Methods registration and callbacks
 */
class Jetpack_XMLRPC_Methods {

	/**
	 * Initialize the main hooks.
	 */
	public static function init() {
		add_filter( 'jetpack_xmlrpc_unauthenticated_methods', array( __CLASS__, 'xmlrpc_methods' ) );
		add_filter( 'jetpack_xmlrpc_test_connection_response', array( __CLASS__, 'test_connection' ) );
		add_action( 'jetpack_xmlrpc_server_event', array( __CLASS__, 'jetpack_xmlrpc_server_event' ), 10, 4 );
		add_action( 'jetpack_remote_connect_end', array( __CLASS__, 'remote_connect_end' ) );
		add_filter( 'jetpack_xmlrpc_remote_register_redirect_uri', array( __CLASS__, 'remote_register_redirect_uri' ) );
	}

	/**
	 * Adds Jetpack specific methods to the methods added by the Connection package.
	 *
	 * @param array $methods Methods added by the Connection package.
	 */
	public static function xmlrpc_methods( $methods ) {

		$methods['jetpack.featuresAvailable'] = array( __CLASS__, 'features_available' );
		$methods['jetpack.featuresEnabled']   = array( __CLASS__, 'features_enabled' );
		$methods['jetpack.disconnectBlog']    = array( __CLASS__, 'disconnect_blog' );
		$methods['jetpack.jsonAPI']           = array( __CLASS__, 'json_api' );

		return $methods;
	}

	/**
	 * Returns what features are available. Uses the slug of the module files.
	 *
	 * @deprecated 13.9
	 * @see Jetpack_Core_Json_Api_Endpoints::get_features_available()
	 * @return array
	 */
	public static function features_available() {
		$raw_modules = Jetpack::get_available_modules();
		$modules     = array();
		foreach ( $raw_modules as $module ) {
			$modules[] = Jetpack::get_module_slug( $module );
		}

		return $modules;
	}

	/**
	 * Returns what features are enabled. Uses the slug of the modules files.
	 *
	 * @deprecated 13.9
	 * @see Jetpack_Core_Json_Api_Endpoints::get_features_enabled()
	 * @return array
	 */
	public static function features_enabled() {
		$raw_modules = Jetpack::get_active_modules();
		$modules     = array();
		foreach ( $raw_modules as $module ) {
			$modules[] = Jetpack::get_module_slug( $module );
		}

		return $modules;
	}

	/**
	 * Filters the result of test_connection XMLRPC method
	 *
	 * @return string The current Jetpack version number
	 */
	public static function test_connection() {
		return JETPACK__VERSION;
	}

	/**
	 * Disconnect this blog from the connected wordpress.com account
	 *
	 * @return boolean
	 */
	public static function disconnect_blog() {

		/**
		 * Fired when we want to log an event to the Jetpack event log.
		 *
		 * @since 7.7.0
		 *
		 * @param string $code Unique name for the event.
		 * @param string $data Optional data about the event.
		 */
		do_action( 'jetpack_event_log', 'disconnect' );
		( new Connection_Manager( 'jetpack' ) )->disconnect_site();

		return true;
	}

	/**
	 * Serve a JSON API request.
	 *
	 * @param array $args request arguments.
	 */
	public static function json_api( $args = array() ) {
		$json_api_args        = $args[0];
		$verify_api_user_args = $args[1];

		$method       = (string) $json_api_args[0];
		$url          = (string) $json_api_args[1];
		$post_body    = $json_api_args[2] === null ? null : (string) $json_api_args[2];
		$user_details = (array) $json_api_args[4];
		$locale       = (string) $json_api_args[5];

		if ( ! $verify_api_user_args ) {
			$user_id = 0;
		} elseif ( 'internal' === $verify_api_user_args[0] ) {
			$user_id = (int) $verify_api_user_args[1];
			if ( $user_id ) {
				$user = get_user_by( 'id', $user_id );
				if ( ! $user || is_wp_error( $user ) ) {
					return false;
				}
			}
		} else {
			$user_id = call_user_func( array( new Jetpack_XMLRPC_Server(), 'test_api_user_code' ), $verify_api_user_args );
			if ( ! $user_id ) {
				return false;
			}
		}

		$old_user = wp_get_current_user();
		wp_set_current_user( $user_id );

		if ( $user_id ) {
			$token_key = false;
		} else {
			$verified  = ( new Connection_Manager() )->verify_xml_rpc_signature();
			$token_key = $verified['token_key'];
		}

		$token = ( new Tokens() )->get_access_token( $user_id, $token_key );
		if ( ! $token || is_wp_error( $token ) ) {
			return false;
		}

		define( 'REST_API_REQUEST', true );
		define( 'WPCOM_JSON_API__BASE', 'public-api.wordpress.com/rest/v1' );

		require_once JETPACK__PLUGIN_DIR . 'class.json-api.php';
		$api                        = WPCOM_JSON_API::init( $method, $url, $post_body );
		$api->token_details['user'] = $user_details;

		$api->init_locale( $locale );

		require_once JETPACK__PLUGIN_DIR . 'class.json-api-endpoints.php';

		$display_errors = ini_set( 'display_errors', 0 ); // phpcs:ignore WordPress.PHP.IniSet
		ob_start();
		$api->serve( false );
		$output = ob_get_clean();
		ini_set( 'display_errors', $display_errors ); // phpcs:ignore WordPress.PHP.IniSet

		$nonce = wp_generate_password( 10, false );
		$hmac  = hash_hmac( 'md5', $nonce . $output, $token->secret );

		wp_set_current_user( isset( $old_user->ID ) ? $old_user->ID : 0 );

		return array(
			(string) $output,
			(string) $nonce,
			(string) $hmac,
		);
	}

	/**
	 * Filters the response of the remote_provision XMLRPC method
	 *
	 * @param array $response The response.
	 * @param array $request An array containing at minimum a nonce key and a local_username key.
	 *
	 * @since 9.8.0
	 * @deprecated since 13.9
	 *
	 * @return array
	 */
	public static function remote_provision_response( $response, $request ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
		_deprecated_function( __METHOD__, '13.9' );
		return $response;
	}

	/**
	 * Runs Jetpack specific action in xmlrpc server events
	 *
	 * @param String  $action the action name, i.e., 'remote_authorize'.
	 * @param String  $stage  the execution stage, can be 'begin', 'success', 'error', etc.
	 * @param array   $parameters extra parameters from the event.
	 * @param WP_User $user the acting user.
	 * @return void
	 */
	public static function jetpack_xmlrpc_server_event( $action, $stage, $parameters = array(), $user = null ) { //phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
		if ( 'remote_register' === $action && 'begin' === $stage ) {
			Jetpack::maybe_set_version_option();
		}
	}

	/**
	 * Hooks into the remote_connect XMLRPC endpoint and triggers Jetpack::handle_post_authorization_actions
	 *
	 * @since 9.8.0
	 * @return void
	 */
	public static function remote_connect_end() {
		/** This filter is documented in class.jetpack-cli.php */
		$enable_sso = apply_filters( 'jetpack_start_enable_sso', true );
		Jetpack::handle_post_authorization_actions( $enable_sso, false, false );
	}

	/**
	 * Filters the Redirect URI returned by the remote_register XMLRPC method
	 *
	 * @since 9.8.0
	 *
	 * @param string $redirect_uri The Redirect URI.
	 * @return string
	 */
	public static function remote_register_redirect_uri( $redirect_uri ) {
		$auto_enable_sso = ( ! ( new Connection_Manager() )->has_connected_owner() || Jetpack::is_module_active( 'sso' ) );

		/** This filter is documented in class.jetpack-cli.php */
		if ( apply_filters( 'jetpack_start_enable_sso', $auto_enable_sso ) ) {
			$redirect_uri = add_query_arg(
				array(
					'action'      => 'jetpack-sso',
					'redirect_to' => rawurlencode( admin_url() ),
				),
				wp_login_url() // TODO: come back to Jetpack dashboard?
			);
		}

		return $redirect_uri;
	}
}