132 lines
3.8 KiB
PHP
132 lines
3.8 KiB
PHP
<?php
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/**
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* Page Cache Ultimate, Page Cache standard and Speed pack are powered by Jpresta (jpresta . com)
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*
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* @author Jpresta
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* @copyright Jpresta
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* @license See the license of this module in file LICENSE.txt, thank you.
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*/
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if (!defined('_PS_VERSION_')) {exit;}
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if (!class_exists('JprestaCacheKey')) {
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if (!defined('JSON_INVALID_UTF8_SUBSTITUTE')) {
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//PHP < 7.2 Define it as 0 so it does nothing
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define('JSON_INVALID_UTF8_SUBSTITUTE', 0);
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}
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class JprestaCacheKey
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{
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/**
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* This public only to be able to encode in JSON, you must use functions
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* @var integer CRC32 as an unsigned integer
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*/
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public $key_int = null;
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/**
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* This public only to be able to encode in JSON, you must use functions
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* @var string CRC32 as a string compatible with filename
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*/
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public $key_string = null;
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/**
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* This public only to be able to encode in JSON, you must use functions
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* @var array All informations used to compute the cache key
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*/
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public $infos = array();
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/**
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* @var array Informations relative to the cache but ignored in key computation
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*/
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public $infos_ignored = array();
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/**
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* @param $key
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* @param $value
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* @param bool $ignoreInKey If true it will be ignored in key computation
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*/
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public function add($key, $value, $ignoreInKey = false)
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{
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$this->key_int = null;
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$this->key_string = null;
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if ($ignoreInKey) {
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$this->infos_ignored[$key] = $value;
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} else {
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$this->infos[$key] = $value;
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}
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}
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/**
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* @param $key string Key used with @add function
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* @param null $default
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* @return mixed|null
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*/
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public function get($key, $default = null)
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{
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if ($key && array_key_exists($key, $this->infos)) {
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return $this->infos[$key];
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} elseif ($key && array_key_exists($key, $this->infos_ignored)) {
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return $this->infos_ignored[$key];
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}
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return $default;
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}
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/**
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* @param $key string Key used with @add function
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*/
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public function remove($key)
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{
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if ($key && array_key_exists($key, $this->infos)) {
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unset($this->infos[$key]);
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$this->key_int = null;
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$this->key_string = null;
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}
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}
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/**
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* @return $this
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*/
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public function compute()
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{
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if ($this->key_int === null || $this->key_string == null) {
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// Make sure information are in the same order
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ksort($this->infos);
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// Create a unique string
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$str = json_encode($this->infos, JSON_INVALID_UTF8_SUBSTITUTE);
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// Compute CRC32 to be used by caching systems (as string)
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$this->key_string = hash("crc32b", $str);
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// Compute CRC32 to be stored in database (as integer)
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$this->key_int = (int) hexdec($this->key_string);
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}
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return $this;
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}
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public function toInt()
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{
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$this->compute();
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return $this->key_int;
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}
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public function toString()
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{
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$this->compute();
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return $this->key_string;
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}
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/**
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* @param $keyInt double
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* @return string
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*/
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public static function intToString($keyInt)
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{
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return sprintf("%08x", (double) $keyInt);
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}
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public function getInfos()
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{
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return $this->infos;
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}
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}
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}
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