<?php
/**
 * Rest Component: Counter
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage rest
 */

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

/**
 * Rest Component: Counter
 *
 * Counter interface for any generic counter
 *
 * @version 0.2.1
 * @package WB
 * @subpackage rest
 */
class WBRest_Component_Counter extends WBRest_Component
{
    /**
     * Counter
     * @var WBDatasource_Counter
     */
    private $cnt;

    /**
     * 2nd constructor
     *
     */
    public function init()
    {
        $this->cnt  =   WBClass::create('WBDatasource_Counter');
    }

    /**
     * Handle Default Request
     *
     * Get, set or increment counters for namspaces. Path contains:
     * - namespace (string)
     * - command, on of: "get", "set" or "inc"
     * - optional value to set or increment
     *
     * @param array $path
     */
    public function defaultRequest($path)
    {
        // default operation: get
        if (2 > count($path)) {
            $patn[] =   'get';
        }

        // first in path must be namespace
        $ns =   trim(strtolower(array_shift($path)));
        $this->out['namespace'] =   $ns;
        switch (strtolower($path[0])) {
            case 'set':
                $path[1]    =   intval($path[1]);
                if (0 > $path[1]) {
                    $this->status   =   WBRest::STATUS_ERROR;
                    $this->addError('rest:counter:2', 'Cannot set value, value required in request path');
                    return;
                }

                $this->cnt->set($ns, $path[1]);
                break;

            case 'inc':
                if (empty($path[1])) {
                    $path[1]    =   1;
                }
                $this->cnt->inc($ns, $path[1]);
                break;

            default:
            case 'get':
                break;
        }
        $cnt    =   $this->cnt->get($ns);
        $this->out['counter']   =   $cnt['counter'];
        $this->out['changed']   =   $cnt['changed'];
    }
}