<?PHP
/**
 * patTemplate modfifier Userdata
 *
 * $Id$
 *
 * @package patTemplate
 * @package Modifiers
 * @author gERD Schaufelberger <gerd@schaufelberger.de>
 */

/**
 * patTemplate modifier Userdata
 * 
 * Load user data and select column
 *
 * Parameter:
 *  - column, which column to display
 *
 * @package patTemplate
 * @package Modifiers
 * @author gERD Schaufelberger <gerd@schaufelberger.de>
 */
class patTemplate_Modifier_Userdata extends patTemplate_Modifier
{
   /**
    * shared table object
    * @var WBDatasource_Table
    */
    static protected $us    =   null;

   /**
    * modify the value
    *
    * @access   public
    * @param    string      value
    * @return   string      modified value
    */
    public function modify($value, $params = array())
    {
        if (!isset($params['column'])) {
            return $value;
        }

        if (0 == intval($value)) {
            return '';
        }

        $this->startUserStorage();
        if (!self::$us->load($value)) {
            return '';
        }

        $data   =   self::$us->get();
        if (empty($data[$params['column']])) {
            return '';
        }

        return $data[$params['column']];
    }

    private function startUserStorage()
    {
        if (self::$us) {
            return;
        }

        /** @var WBUser */
        $user   =   WBClass::create('WBUser');
        self::$us   =   $user->getStorageModule();
    }
}