<?php
/**
 * Populate form element's value in conditional to user group
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage db
 */

WBClass::load('WBDatasource_FormAttribute'
, 'WBUser');

/**
 * Populate form element's value in conditional to user group
 *
 *
 * @version 1.0.0
 * @package WB
 * @subpackage db
 */
class WBDatasource_FormAttribute_ValueByGroup extends WBDatasource_FormAttribute
{
    /**
     * configuration parameter
     *
     * - require: "all" (default) or "any"
     * - group List of groups, negate with ! in front. Only set user id of user in group or not in groups
     * - value array or string
     * @var array
     */
    protected $config   =   array(
                                'require'   =>  'all',
                                'group'     =>  array(),
                                'value'     =>  null
                            );

    /**
     * get attribute's value
     *
     *
     *
     * @param mixed $current actual attribute value
     * @return array
     */
    protected function getAttributeValue($current)
    {
        $user   =   WBUser::getCurrent();

        if (empty($this->config['group'])) {
            return $this->config['value'];
        }

        foreach ($this->config['group'] as $g) {
            $rel    =   true;
            if (0 == strncmp('!', $g, 1)) {
                $rel    =   false;
                $g      =   substr($g, 1);
            }

            $ret    =   $this->config['value'];
            $res    =   ($user->isInGroup($g) !== $rel);
            switch ($this->config['require']) {
                case    'any':
                    if ($rel) {
                        return $this->config['value'];
                    }
                    $ret    =   $current;
                    break;

                case    'all':
                default:
                    if (!$res) {
                        return $current;
                    }
                    break;
            }
        }

        return $ret;
    }
}