mirror of
https://github.com/alextselegidis/easyappointments.git
synced 2024-11-28 19:03:21 +03:00
286 lines
6.7 KiB
PHP
286 lines
6.7 KiB
PHP
<?php
|
|
/**
|
|
* CodeIgniter
|
|
*
|
|
* An open source application development framework for PHP
|
|
*
|
|
* This content is released under the MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
* @package CodeIgniter
|
|
* @author EllisLab Dev Team
|
|
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
|
|
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
|
|
* @license https://opensource.org/licenses/MIT MIT License
|
|
* @link https://codeigniter.com
|
|
* @since Version 2.0
|
|
* @filesource
|
|
*/
|
|
defined('BASEPATH') OR exit('No direct script access allowed');
|
|
|
|
/**
|
|
* CodeIgniter File Caching Class
|
|
*
|
|
* @package CodeIgniter
|
|
* @subpackage Libraries
|
|
* @category Core
|
|
* @author EllisLab Dev Team
|
|
* @link
|
|
*/
|
|
class CI_Cache_file extends CI_Driver {
|
|
|
|
/**
|
|
* Directory in which to save cache files
|
|
*
|
|
* @var string
|
|
*/
|
|
protected $_cache_path;
|
|
|
|
/**
|
|
* Initialize file-based cache
|
|
*
|
|
* @return void
|
|
*/
|
|
public function __construct()
|
|
{
|
|
$CI =& get_instance();
|
|
$CI->load->helper('file');
|
|
$path = $CI->config->item('cache_path');
|
|
$this->_cache_path = ($path === '') ? APPPATH.'cache/' : $path;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Fetch from cache
|
|
*
|
|
* @param string $id Cache ID
|
|
* @return mixed Data on success, FALSE on failure
|
|
*/
|
|
public function get($id)
|
|
{
|
|
$data = $this->_get($id);
|
|
return is_array($data) ? $data['data'] : FALSE;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Save into cache
|
|
*
|
|
* @param string $id Cache ID
|
|
* @param mixed $data Data to store
|
|
* @param int $ttl Time to live in seconds
|
|
* @param bool $raw Whether to store the raw value (unused)
|
|
* @return bool TRUE on success, FALSE on failure
|
|
*/
|
|
public function save($id, $data, $ttl = 60, $raw = FALSE)
|
|
{
|
|
$contents = array(
|
|
'time' => time(),
|
|
'ttl' => $ttl,
|
|
'data' => $data
|
|
);
|
|
|
|
if (write_file($this->_cache_path.$id, serialize($contents)))
|
|
{
|
|
chmod($this->_cache_path.$id, 0640);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Delete from Cache
|
|
*
|
|
* @param mixed unique identifier of item in cache
|
|
* @return bool true on success/false on failure
|
|
*/
|
|
public function delete($id)
|
|
{
|
|
return is_file($this->_cache_path.$id) ? unlink($this->_cache_path.$id) : FALSE;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Increment a raw value
|
|
*
|
|
* @param string $id Cache ID
|
|
* @param int $offset Step/value to add
|
|
* @return New value on success, FALSE on failure
|
|
*/
|
|
public function increment($id, $offset = 1)
|
|
{
|
|
$data = $this->_get($id);
|
|
|
|
if ($data === FALSE)
|
|
{
|
|
$data = array('data' => 0, 'ttl' => 60);
|
|
}
|
|
elseif ( ! is_int($data['data']))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$new_value = $data['data'] + $offset;
|
|
return $this->save($id, $new_value, $data['ttl'])
|
|
? $new_value
|
|
: FALSE;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Decrement a raw value
|
|
*
|
|
* @param string $id Cache ID
|
|
* @param int $offset Step/value to reduce by
|
|
* @return New value on success, FALSE on failure
|
|
*/
|
|
public function decrement($id, $offset = 1)
|
|
{
|
|
$data = $this->_get($id);
|
|
|
|
if ($data === FALSE)
|
|
{
|
|
$data = array('data' => 0, 'ttl' => 60);
|
|
}
|
|
elseif ( ! is_int($data['data']))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$new_value = $data['data'] - $offset;
|
|
return $this->save($id, $new_value, $data['ttl'])
|
|
? $new_value
|
|
: FALSE;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Clean the Cache
|
|
*
|
|
* @return bool false on failure/true on success
|
|
*/
|
|
public function clean()
|
|
{
|
|
return delete_files($this->_cache_path, FALSE, TRUE);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Cache Info
|
|
*
|
|
* Not supported by file-based caching
|
|
*
|
|
* @param string user/filehits
|
|
* @return mixed FALSE
|
|
*/
|
|
public function cache_info($type = NULL)
|
|
{
|
|
return get_dir_file_info($this->_cache_path);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get Cache Metadata
|
|
*
|
|
* @param mixed key to get cache metadata on
|
|
* @return mixed FALSE on failure, array on success.
|
|
*/
|
|
public function get_metadata($id)
|
|
{
|
|
if ( ! is_file($this->_cache_path.$id))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$data = unserialize(file_get_contents($this->_cache_path.$id));
|
|
|
|
if (is_array($data))
|
|
{
|
|
$mtime = filemtime($this->_cache_path.$id);
|
|
|
|
if ( ! isset($data['ttl'], $data['time']))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
return array(
|
|
'expire' => $data['time'] + $data['ttl'],
|
|
'mtime' => $mtime
|
|
);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Is supported
|
|
*
|
|
* In the file driver, check to see that the cache directory is indeed writable
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function is_supported()
|
|
{
|
|
return is_really_writable($this->_cache_path);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get all data
|
|
*
|
|
* Internal method to get all the relevant data about a cache item
|
|
*
|
|
* @param string $id Cache ID
|
|
* @return mixed Data array on success or FALSE on failure
|
|
*/
|
|
protected function _get($id)
|
|
{
|
|
if ( ! is_file($this->_cache_path.$id))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$data = unserialize(file_get_contents($this->_cache_path.$id));
|
|
|
|
if ($data['ttl'] > 0 && time() > $data['time'] + $data['ttl'])
|
|
{
|
|
file_exists($this->_cache_path.$id) && unlink($this->_cache_path.$id);
|
|
return FALSE;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
}
|