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