<?php
/**
 * WBEvent_Handler_Table_Saver
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage eventHandler
 */

WBClass::load('WBEvent_Handler'
    , 'WBEvent_Handler_Table');

/**
 * WBEvent_Handler_Table_Saver
 *
 * @version 0.2.0
 * @package Wombat
 * @subpackage eventHandler
 */
class WBEvent_Handler_Table_Saver extends WBEvent_Handler_Table
{
    /**
     * handler config
     *
     * - table name of table to update
     * - key primary key of row to update
     * - keyindex data index where to achieve the primary key from
     * - field list of columes to copy data from event
     * - static additionals static values
     *
     * @var array
     */
    protected $config   =   array(
                                'table'         =>  '',
                                'key'           =>  '__new',
                                'keyindex'      =>  '',
                                'field'         =>  array(),
                                'static'        =>  array(),
                                );


    /**
     * Update Column(s) in Table
     *
     * Update one or more column in one table for one row using primary key
     * Hence primary key is required, as well as column(s) and table name.
     *
     * @param WBEvent $e
     * @return bool true to continue, false to stop processing
     * @throws Exception in case of error
     */
    public function process(WBEvent $e)
    {
        if (empty($this->config['field'])) {
            WBClass::load('WBException_Config');
            throw new WBException_Config('List of fields must not be empty!', 1, __CLASS__);
            return false;
        }

        $key    =   $this->getKey4Config($e);
        $save   =   array();
        foreach ($this->config['field'] as $k) {
            $save[$k]   =   $e->get($k, '');
        }
        foreach ($this->config['static'] as $k => $v) {
            $save[$k]   =   $v;
        }

        $id =   $this->table->save($this->config['table'], $key, $save);
        $e->set('id', $id);

        return true;
    }
}