/**
  * custom callback for validate fields
  * @example https://github.com/leemason/NHP-Theme-Options-Framework/blob/master/nhp-options.php
  * @param $field
  * @param $value
  * @param $existing_value
  */
 public function validate_header_fields_cb($field, $value, $existing_value)
 {
     //$field['msg'] = 'your custom error message';
     if ($field == 'admin_logo' && $value) {
         HW__Site::set_logo($value, false);
     }
     if ($field == 'site_banner' && $value) {
         HW__Site::set_banner($value, false);
     }
     //bloginfo
     if ($field == 'site_name' && $value) {
         $site_info['name'] = $value;
     }
     if ($field == 'slogan' && $value) {
         $site_info['description'] = $value;
     }
     if (!empty($site_info)) {
         HW__Site::update_site_info($site_info, false);
     }
     return $value;
 }
 /**
  * setup site metadata
  * @param $command
  */
 public function setup_site_meta($command, $args)
 {
     #$this->command_log('setup site meta');return;
     //get current template context
     $theme_config = $this->get_option('theme_config');
     //parse config file for current theme
     #site meta
     if ($theme_config->item('site')) {
         $site = $theme_config->item('site');
         HW_NHP_Main_Settings::update_data(array('last_tab' => '1'));
         //fix current tab
         //update site info (name & description, phone...)
         HW__Site::update_site_info($site);
         //update logo
         if (!empty($site['logo'])) {
             //get relative path from current theme directory
             if (!HW_URL::valid_url($site['logo'])) {
                 $site['logo'] = get_stylesheet_directory_uri() . '/' . $site['logo'];
             }
             HW__Site::set_logo($site['logo']);
         }
         //set banner if exists
         if (!empty($site['banner'])) {
             //get relative path from current theme directory
             if (!HW_URL::valid_url($site['banner'])) {
                 $site['banner'] = get_stylesheet_directory_uri() . '/' . $site['banner'];
             }
             HW__Site::set_banner($site['banner']);
         }
         //update user info
         $user = _hw_global('admin')->load_api('HW_WP_User');
         $user->update_user(array('user_email' => $site['email'], 'user_url' => 'http://hoangweb.com', 'description' => $site['footer_text']));
     }
     if ($theme_config->item('configuration')) {
     }
     $this->command_log('setup site meta');
 }