<?php
/**
 * Populate Form Element's Values With Initial Value
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage db
 */

WBClass::load('WBDatasource_FormAttribute');

/**
 * Populate Form Element's Values With Initial Value
 *
 * This works only for items (Enum, RadioGroup, SwitchGroup).
 *
 * @version 0.1.0
 * @package WB
 * @subpackage db
 */
class WBDatasource_FormAttribute_AddInitial extends WBDatasource_FormAttribute
{
    /**
     * Configuration Parameter
     * @var array
     */
    protected $config   =   array(
                                    'class' =>  ''
                                );

    /**
     * Get Attribute's Value
     *
     * Simply append current value as another item in list
     *
     * @param mixed $current actual attribute value
     * @return array
     */
    protected function getAttributeValue($current)
    {
        $iv =   $this->getInitialValue();
        if (empty($iv)) {
            return $current;
        }

        if (!is_array($current)) {
            $current    =   array();
        }

        $current[]  =   array(
                                'value' =>  $iv,
                                'label' =>  $iv,
                                'class' =>  $this->config['class']
                            );
        return $current;
    }
}