<?php
/**
 * Simple AJAX Caller: Event Observer
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

WBClass::load('WBAjax');

/**
 * Simple AJAX Caller: EventObserver
 *
 * Poll site events and such.
 * 
 * @version 0.1.0
 * @package WB
 * @subpackage base
 */
class WBAjax_EventObserver extends WBAjax
{
    /**
     * second construcotr
     * 
     * Called by constructer of super class.
     * 
     * @see include/WB/WBAjax#init()
     */
    protected function init()
    {
    }
    
    /**
     * poll site events
     * 
     * Check whether there are any queued events and report them
     * 
     * @return string comment list HTML
     */
    protected function poll()
    {
        $cnt    =   intval($this->req->get('count', 0));
        $data   =   array(
                    'timestamp' =>  time(),
                    'count'     =>  $cnt,
                    'delay'     =>  100
                    );

        // set dynamic delay
        switch ($cnt) {
            case 10:
            case 9:
            case 8:
            case 7:
            case 6:
                $data['delay']  =   30;
                break;
            case 5:
            case 4:
            case 3:
            case 2:
                $data['delay']  =   20;
                break;
            case 1:
            case 0:
                $data['delay']  =   10;
                break;

            default:
                if (20 > $cnt) {
                    $data['dalay']  =   50;
                }
                break;
        }
                        
        return json_encode($data);
    }
}