mirror of
https://github.com/alextselegidis/easyappointments.git
synced 2024-11-08 17:12:25 +03:00
222 lines
5.8 KiB
PHP
222 lines
5.8 KiB
PHP
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<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* Database Cache Class
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*
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/userguide3/database/
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*/
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class CI_DB_Cache {
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/**
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* CI Singleton
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*
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* @var object
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*/
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public $CI;
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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 $db;
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// --------------------------------------------------------------------
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/**
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* Constructor
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*
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* @param object &$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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// Assign the main CI object to $this->CI and load the file helper since we use it a lot
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$this->CI =& get_instance();
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$this->db =& $db;
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$this->CI->load->helper('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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if ($path === '')
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{
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if ($this->db->cachedir === '')
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{
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return $this->db->cache_off();
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}
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$path = $this->db->cachedir;
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}
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// Add a trailing slash to the path if needed
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$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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log_message('debug', 'DB cache path error: '.$path);
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// If the path is wrong we'll turn off caching
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return $this->db->cache_off();
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}
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if ( ! is_really_writable($path))
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{
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log_message('debug', '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->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1);
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$segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
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$filepath = $this->db->cachedir.$segment_one.'+'.$segment_two.'/'.md5($sql);
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if ( ! is_file($filepath) OR FALSE === ($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->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1);
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$segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
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$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->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1);
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}
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if ($segment_two === '')
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{
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$segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
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}
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$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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