felixarntz/wp-encrypt

<?php
/**
 * WPENC\NetworkSettingsAPI class
 *
 * @package WPENC
 * @author Felix Arntz <felix-arntz@leaves-and-love.net>
 * @since 1.0.0
 */

namespace WPENC;

if ( ! defined( 'ABSPATH' ) ) {
    die();
}

if ( ! class_exists( 'WPENC\NetworkSettingsAPI' ) ) {
    /**
     * This class implements a simple Settings API for the network admin.
     *
     * WordPress Core doesn't currently provide this.
     *
     * @since 1.0.0
     */
    final class NetworkSettingsAPI {
        /**
         * Adds the required action hooks.
         *
         * @since 1.0.0
         * @access public
         */
        public function run() {
            add_action( 'wpmuadminedit', array( $this, 'update_network_option' ) );
            add_action( 'network_admin_notices', array( $this, 'network_options_head' ), 9999 );
        }

        /**
         * Updates network options for a network settings page.
         *
         * This method relies on the settings page to use the `settings_fields()` function, similarly
         * to regular WordPress settings pages.
         *
         * @since 1.0.0
         * @access public
         */
        public function update_network_option() {
            if ( ! isset( $_POST['option_page'] ) || ! isset( $_POST['action'] ) || 'update' !== $_POST['action'] ) {
                return;
            }

            $option_page = $_POST['option_page'];
            if ( 'wp_encrypt_settings' !== $option_page ) {
                return;
            }

            check_admin_referer( 'wp_encrypt_settings-options' );

            if ( isset( $_POST['wp_encrypt_settings'] ) ) {
                update_site_option( 'wp_encrypt_settings', wp_unslash( $_POST['wp_encrypt_settings'] ) );
            }

            if ( 0 === count( get_settings_errors() ) ) {
                add_settings_error( 'general', 'settings_updated', __( 'Settings saved.' ), 'updated' );
            }

            set_site_transient( 'settings_errors', get_settings_errors(), 30 );

            wp_redirect( add_query_arg( 'updated', 'true', network_admin_url( 'settings.php?page=wp_encrypt' ) ) );
            exit;
        }

        /**
         * Makes sure that settings errors are printed appropriately for a network settings page.
         *
         * @since 1.0.0
         * @access public
         */
        public function network_options_head() {
            global $parent_file, $wp_settings_errors;

            if ( 'settings.php' === $parent_file ) {
                if ( isset( $_GET['updated'] ) && $_GET['updated'] && get_site_transient( 'settings_errors' ) ) {
                    $wp_settings_errors = array_merge( (array) $wp_settings_errors, get_site_transient( 'settings_errors' ) );
                }
                settings_errors();
            }
        }
    }
}