/json-endpoints/jetpack/class.jetpack-json-api-core-modify-endpoint.php

<?php 
 
class Jetpack_JSON_API_Core_Modify_Endpoint extends Jetpack_JSON_API_Core_Endpoint { 
  // POST /sites/%s/core 
  // POST /sites/%s/core/update 
  protected $needed_capabilities = 'update_core'; 
  protected $action = 'default_action'; 
  protected $new_version; 
  protected $log; 
 
  public function default_action() { 
      $args = $this->input(); 
 
      if ( isset( $args['autoupdate'] ) && is_bool( $args['autoupdate'] ) ) { 
          Jetpack_Options::update_option( 'autoupdate_core', $args['autoupdate'] ); 
      } 
 
      return true; 
  } 
 
  protected function update( $version, $locale ) { 
      $args = $this->input(); 
      $version = isset( $args['version'] ) ? $args['version'] : false; 
      $locale = isset( $args['locale'] ) ? $args['locale'] : get_locale(); 
 
      include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php'; 
 
      delete_site_transient( 'update_core' ); 
      wp_version_check( array(), true ); 
 
      if ( $version ) { 
          $update = find_core_update( $version, $locale ); 
      } else { 
          $update = $this->find_latest_update_offer(); 
      } 
 
      $skin = new Automatic_Upgrader_Skin(); 
      $upgrader = new Core_Upgrader( $skin ); 
 
      $this->new_version = $upgrader->upgrade( $update ); 
 
      $this->log = $upgrader->skin->get_upgrade_messages(); 
 
      if ( is_wp_error( $this->new_version ) ) { 
          return $this->new_version; 
      } 
 
      return $this->new_version; 
  } 
 
  protected function find_latest_update_offer() { 
      // Select the latest update. 
      // Remove filters to bypass automattic updates. 
      add_filter( 'request_filesystem_credentials', '__return_true' ); 
      add_filter( 'automatic_updates_is_vcs_checkout', '__return_false' ); 
      add_filter( 'allow_major_auto_core_updates', '__return_true' ); 
      add_filter( 'send_core_update_notification_email', '__return_false' ); 
      $update = find_core_auto_update(); 
      remove_filter( 'request_filesystem_credentials', '__return_true' ); 
      remove_filter( 'automatic_updates_is_vcs_checkout', '__return_false' ); 
      remove_filter( 'allow_major_auto_core_updates', '__return_true' ); 
      remove_filter( 'send_core_update_notification_email', '__return_false' ); 
      return $update; 
  } 
 
}