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

WBClass::load('WBDatasource_FormAttribute');

/**
 * Populate Form Element's Values: Remove Duplicates
 *
 * This works only for items (Enum, RadioGroup, SwitchGroup).
 * See if there are any values are the same and remove reoccuring records
 *
 * @version 0.1.0
 * @package WB
 * @subpackage db
 */
class WBDatasource_FormAttribute_Unique extends WBDatasource_FormAttribute
{
    /**
     * Configuration Parameter
     * @var array
     */
    protected $config   =   array(
                                );

    /**
     * Get Attribute's Value
     *
     * Remove duplicates from list
     *
     * @param mixed $current actual attribute value
     * @return array
     */
    protected function getAttributeValue($current)
    {
        if (!is_array($current)) {
            return $current;
        }

        if (!is_array($current[0]) || !isset($current[0]['value'])) {
            return $current;
        }

        $list   =   array();
        foreach ($current as $c) {
            if (isset($list[$c['value']])) {
                continue;
            }
            $list[$c['value']]  =   $c;
        }

        return array_values($list);
    }
}