<?php

define('DIRWATCHER_CHANGED', IN_MODIFY | IN_CLOSE_WRITE | IN_MOVE| IN_CREATE | IN_DELETE );

/**

 * DirWatcher

 *

 * @author Charles Tang <charlestang AT foxmail DOT com>

 */

class DirWatcher {

    private $_callbacks = array();

    private $_directories = array();

    private $_inotify = null;

    public function __construct() {

        $this->_inotify = inotify_init();

    }

    public function addDirectory($path, $mask =DIRWATCHER_CHANGED) {

        $key = md5($path);

        if (!isset($this->_directories[$key])) {

            $wd = inotify_add_watch($this->_inotify, $path,$mask);

            $this->_directories[$key] = array(

                'wd' => $wd,

                'path' => $path,

                'mask' => $mask,

            );

        }

    }

    public function removeDirectory($path) {

        $key = md5($path);

        if (isset($this->_directories[$key])) {

            $wd = $this->_directories[$key]['wd'];

            if (inotify_rm_watch($this->_inotify, $wd)) {

                unset($this->_directories[$key]);

            }

        }

    }

    public function addDirectories($directories) {

        foreach ($directories as $dir) {

            if (!is_array($dir)) {