<?php
/**
 * Key-Value-Pair List Merger: Ordered
 *
 * $Id$
 *
 * @package WB
 * @subpackage keyvaluepair
 * @author gERD Schaufelberger <gerd@php-tools.net>
 */

WBClass::load('WBDatasource_KeyValuePair_ListMerger');

/**
 * Key-Value-Pair List Merger: Ordered
 *
 * Merǵing strategy
 *
 * @version 1.0.0
 * @package WB
 * @subpackage keyvaluepair
 * @author gERD Schaufelberger <gerd@php-tools.net>
 */
class WBDatasource_KeyValuePair_ListMerger_Ordered extends WBDatasource_KeyValuePair_ListMerger
{
    /**
     * Get List
     *
     * @param string|array $id
     * @param array $params
     * @return array
     */
    public function get($id, $params = array())
    {
        if (!is_array($id)) {
            $id =   array($id);
        }
        if (!empty($params['parent']) && !in_array($params['parent'], $id)) {
            $id[]   =   $params['parent'];
        }
        $list   =   $this->kvp->get($id, true);

        // simple list without merging
        if (1 == count($id)) {
            foreach ($list as $j => &$c) {
                $c['parentvalue']   =   '';
                $c['class']         =   '';
            }
            return $list;
        }

        // merge list
        $merged =   array();
        foreach ($list as $i => &$l) {
            if ($id[1] == $l['id']) {
                foreach ($list as $j => &$c) {
                    if ($id[0] == $c['id'] && $c['key'] == $l['key']) {
                        $c['parentvalue']   =   $l['value'];
                        $c['class']         =   'merged';
                        $merged[]           =   $c['key'];
                        unset($list[$i]);
                        break;
                    }
                }
                $l['parentvalue']   =   '';
                $l['class']         =   '';
            }
            else if (!in_array($l['key'], $merged)) {
                $l['class']         =   'added';
            }
        }

        return array_values($list);
    }

}