save_post_meta() public static method

Saves the Apple News meta fields associated with a post
public static save_post_meta ( integer $post_id )
$post_id integer
 /**
  * Handles a push to Apple News action.
  *
  * @param int $id
  * @access private
  */
 private function push_action($id)
 {
     // Ensure the post is published
     if ('publish' != get_post_status($id)) {
         $this->notice_error(sprintf(__('Article %s is not published and cannot be pushed to Apple News.', 'apple-news'), $id));
         return;
     }
     // Check the nonce.
     // If it isn't set, this isn't a form submission so we need to just display the form.
     if (!isset($_POST['apple_news_nonce'])) {
         return;
     }
     // If invalid, we need to display an error.
     if (!wp_verify_nonce($_POST['apple_news_nonce'], 'publish')) {
         $this->notice_error(__('Invalid nonce.', 'apple-news'));
     }
     // Save fields
     \Admin_Apple_Meta_Boxes::save_post_meta($id);
     $message = __('Settings saved.', 'apple-news');
     // Push the post
     $action = new Apple_Actions\Index\Push($this->settings, $id);
     try {
         $action->perform();
         // In async mode, success or failure will be displayed later
         if ('yes' !== $this->settings->get('api_async')) {
             $this->notice_success(__('Your article has been pushed successfully!', 'apple-news'));
         } else {
             $this->notice_success(__('Your article will be pushed shortly.', 'apple-news'));
         }
     } catch (Apple_Actions\Action_Exception $e) {
         $this->notice_error($e->getMessage());
     }
 }