217 lines
5.3 KiB
PHP
217 lines
5.3 KiB
PHP
<?php
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/**
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* FuzeWorks.
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*
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* The FuzeWorks MVC PHP FrameWork
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*
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* Copyright (C) 2015 TechFuze
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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 <http://www.gnu.org/licenses/>.
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*
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* @author TechFuze
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* @copyright Copyright (c) 2013 - 2016, Techfuze. (http://techfuze.net)
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* @copyright Copyright (c) 1996 - 2015, Free Software Foundation, Inc. (http://www.fsf.org/)
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* @license http://opensource.org/licenses/GPL-3.0 GPLv3 License
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*
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* @link http://techfuze.net/fuzeworks
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* @since Version 0.0.1
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*
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* @version Version 1.0.0
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*/
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use FuzeWorks\Logger;
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use Fuzeworks\Factory;
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use FuzeWorks\Core;
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/**
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* Database Cache Class
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*
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* Converted from CodeIgniter.
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*
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* @package FuzeWorks
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/database/
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* @license http://opensource.org/licenses/MIT MIT License
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*/
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class FW_DB_Cache {
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/**
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* Database object
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*
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* Allows passing of DB object so that multiple database connections
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* and returned DB objects can be supported.
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*
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* @var object
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*/
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public $db;
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/**
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* The FuzeWorks factory class
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*
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* @var Fuzeworks\Factory;
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*/
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private $factory;
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// --------------------------------------------------------------------
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/**
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* Constructor
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*
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* @param object &$db
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* @return void
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*/
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public function __construct(&$db)
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{
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$this->db =& $db;
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$this->factory = Factory::getInstance();
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$this->factory->helpers->load('file');
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$this->check_path();
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}
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// --------------------------------------------------------------------
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/**
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* Set Cache Directory Path
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*
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* @param string $path Path to the cache directory
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* @return bool
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*/
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public function check_path($path = '')
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{
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$path = ($path === '' ? Core::$tempDir . DS . 'Database' : $path);
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// Add a trailing slash to the path if needed
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$path = realpath($path)
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? rtrim(realpath($path), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR
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: rtrim($path, '/').'/';
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if ( ! is_dir($path))
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{
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if (!mkdir($path, 0777, false))
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{
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Logger::logDebug('DB cache path error: '.$path);
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// If the path is wrong we'll turn off caching
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return $this->db->cache_off();
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}
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}
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if ( ! Core::isReallyWritable($path))
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{
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Logger::logDebug('DB cache dir not writable: '.$path);
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// If the path is not really writable we'll turn off caching
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return $this->db->cache_off();
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}
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$this->db->cachedir = $path;
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Retrieve a cached query
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*
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* The URI being requested will become the name of the cache sub-folder.
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* An MD5 hash of the SQL statement will become the cache file name.
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*
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* @param string $sql
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* @return string
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*/
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public function read($sql)
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{
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$segment_one = ($this->factory->uri->segment(1) == FALSE) ? 'default' : $this->factory->uri->segment(1);
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$segment_two = ($this->factory->uri->segment(2) == FALSE) ? 'index' : $this->factory->uri->segment(2);
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$filepath = $this->db->cachedir.$segment_one.'+'.$segment_two.'/'.md5($sql);
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if (FALSE === ($cachedata = @file_get_contents($filepath)))
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{
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return FALSE;
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}
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return unserialize($cachedata);
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}
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// --------------------------------------------------------------------
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/**
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* Write a query to a cache file
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*
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* @param string $sql
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* @param object $object
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* @return bool
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*/
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public function write($sql, $object)
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{
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$segment_one = ($this->factory->uri->segment(1) == FALSE) ? 'default' : $this->factory->uri->segment(1);
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$segment_two = ($this->factory->uri->segment(2) == FALSE) ? 'index' : $this->factory->uri->segment(2);
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$dir_path = $this->db->cachedir.$segment_one.'+'.$segment_two.'/';
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$filename = md5($sql);
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if ( ! is_dir($dir_path) && ! @mkdir($dir_path, 0750))
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{
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return FALSE;
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}
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if (write_file($dir_path.$filename, serialize($object)) === FALSE)
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{
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return FALSE;
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}
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chmod($dir_path.$filename, 0640);
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Delete cache files within a particular directory
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*
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* @param string $segment_one
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* @param string $segment_two
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* @return void
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*/
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public function delete($segment_one = '', $segment_two = '')
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{
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if ($segment_one === '')
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{
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$segment_one = ($this->factory->uri->segment(1) == FALSE) ? 'default' : $this->factory->uri->segment(1);
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}
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if ($segment_two === '')
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{
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$segment_two = ($this->factory->uri->segment(2) == FALSE) ? 'index' : $this->factory->uri->segment(2);
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}
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$dir_path = $this->db->cachedir.$segment_one.'+'.$segment_two.'/';
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delete_files($dir_path, TRUE);
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}
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// --------------------------------------------------------------------
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/**
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* Delete all existing cache files
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*
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* @return void
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*/
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public function delete_all()
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{
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delete_files($this->db->cachedir, TRUE, TRUE);
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}
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}
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