<?php
/**
 * Populate form element's attribute conditional
 *
 * $Id: SwitchByGroup.php 1471 2013-08-26 12:42:45Z gerd $
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage db
 */

WBClass::load('WBDatasource_FormAttribute');

/**
 * Populate form element's attribute conditional
 *
 *
 * @version 1.0.1
 * @package WB
 * @subpackage db
 */
class WBDatasource_FormAttribute_SwitchIfEqual extends WBDatasource_FormAttribute
{
    /**
     * configuration parameter
     *
     * - switch named attribute like "disabled". used for value lists
     * - value switch target value
     * - left compare left side
     * - right compare right side
     * @var array
     */
    protected $config   =   array(
                                'switch'    =>  'disabled',
                                'value'     =>  'no',
                                'left'      =>  '',
                                'right'     =>  '',
                                'equal'     =>  'yes'
                            );

    /**
     * get attribute's value
     *
     *
     *
     * @param mixed $current actual attribute value
     * @return array
     */
    protected function getAttributeValue($current)
    {
        $this->config['equal']  =   strtolower($this->config['equal']);

        if ('yes' == $this->config['equal'] && $this->config['left'] != $this->config['right']) {
            return $current;
        }
        if ('no' == $this->config['equal'] && $this->config['left'] == $this->config['right']) {
            return $current;
        }

        // just the disabled switch
        if (!is_array($current)) {
            return $this->config['value'];
        }

        // value list
        foreach ($current as &$c) {
            $c[$this->config['switch']] =   $this->config['value'];
        }

        return $current;
    }
}