librenms/includes/object-cache.inc.php
2016-02-17 13:59:58 +00:00

139 lines
4.0 KiB
PHP

<?php
/*
* Copyright (C) 2015 Daniel Preussker <f0o@devilcode.org>
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Object-Cache
* @author f0o <f0o@devilcode.org>
* @copyright 2015 f0o, LibreNMS
* @license GPL
* @package LibreNMS
* @subpackage Cache
*/
class ObjCache implements ArrayAccess {
private $data = array();
private $obj = '';
/**
* Initialize ObjCache
* @param string $obj Name of Object
* @return void
*/
public function __construct($obj) {
global $config;
$this->obj = $obj;
if (isset($GLOBALS['_ObjCache'][$obj])) {
$this->data = $GLOBALS['_ObjCacheSkell'][$obj];
}
else {
if (!is_array($GLOBALS['_ObjCacheSkell'])) {
$GLOBALS['_ObjCacheSkell'] = array();
}
if (!is_array($GLOBALS['_ObjCache'])) {
$GLOBALS['_ObjCache'] = array();
}
if (file_exists($config['install_dir'].'/includes/caches/'.$obj.'.inc.php')) {
$data = array();
include $config['install_dir'].'/includes/caches/'.$obj.'.inc.php';
$this->data = $data;
$GLOBALS['_ObjCacheSkell'][$obj] = $this->data;
if (!is_array($GLOBALS['_ObjCache'][$obj])) {
$GLOBALS['_ObjCache'][$obj] = $this->data;
}
}
}//end if
}//end __construct()
/**
* Check if data exists
* @param string $obj Name of Data-Object
* @return boolean
*/
public function offsetExists($obj) {
if (isset($this->data[$obj])) {
return true;
}
return false;
}//end offsetExists()
/**
* Get Data-Object
* @param string $obj Name of Data-Object
* @return mixed
*/
public function offsetGet($obj) {
if (isset($this->data[$obj])) {
if (isset($this->data[$obj]['value'])) {
return $this->data[$obj]['value'];
}
else if (isset($GLOBALS['_ObjCache'][$this->obj][$obj]['value'])) {
return $GLOBALS['_ObjCache'][$this->obj][$obj]['value'];
}
else {
$GLOBALS['_ObjCache'][$this->obj][$obj]['value'] = dbFetchRows($this->data[$obj]['query'], $this->data[$obj]['params']);
if (sizeof($GLOBALS['_ObjCache'][$this->obj][$obj]['value']) == 1 && sizeof($GLOBALS['_ObjCache'][$this->obj][$obj]['value'][0]) == 1) {
$GLOBALS['_ObjCache'][$this->obj][$obj]['value'] = current($GLOBALS['_ObjCache'][$this->obj][$obj]['value'][0]);
}
return $GLOBALS['_ObjCache'][$this->obj][$obj]['value'];
}
}
}//end offsetGet()
/**
* Overrides internal Cache-Object
* @param string $obj Name of Data-Object
* @param mixed $value Value
* @return boolean
*/
public function offsetSet($obj, $value) {
if (!is_array($this->data[$obj])) {
$this->data[$obj] = array();
}
$this->data[$obj]['value'] = $value;
return $this->data[$obj]['value'];
}//end offsetSet()
/**
* Reset Data-Object
* @param string $obj Name of Data-Object
* @return mixed
*/
public function offsetUnset($obj) {
unset($this->data[$obj]['value']);
return true;
}//end offsetUnset()
}//end class