107 lines
2.3 KiB
PHP
107 lines
2.3 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: aaflalo
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* Date: 18-03-01
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* Time: 10:23
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*/
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namespace App\LaravelGettext\FileLoader\Cache;
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use Symfony\Component\Translation\Exception\InvalidResourceException;
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use Symfony\Component\Translation\Loader\FileLoader;
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class ApcuFileCacheLoader extends FileLoader
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{
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/**
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* @var FileLoader
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*/
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private $underlyingFileLoader;
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/**
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* ApcuFileCacheLoader constructor.
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*
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* @param FileLoader $underlyingFileLoader
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*/
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public function __construct(FileLoader $underlyingFileLoader)
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{
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$this->underlyingFileLoader = $underlyingFileLoader;
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}
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/**
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* @param string $resource
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*
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* @return array
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*
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* @throws InvalidResourceException if stream content has an invalid format
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*/
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protected function loadResource(string $resource): array
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{
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if (!extension_loaded('apcu')) {
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return $this->underlyingFileLoader->loadResource($resource);
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}
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return $this->cachedMessages($resource);
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}
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/**
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* Calculate the checksum for the file
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*
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* @param $resource
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*
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* @return string
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*/
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private function checksum($resource)
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{
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return filemtime($resource) . '-' . filesize($resource);
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}
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/**
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* Checksum saved in cache
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*
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* @param $resource
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*
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* @return string
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*/
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private function cacheChecksum($resource)
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{
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return apcu_fetch($resource . '-checksum');
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}
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/**
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* Set the cache checksum
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*
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* @param $resource
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* @param $checksum
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*
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* @return array|bool
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*/
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private function setCacheChecksum($resource, $checksum)
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{
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return apcu_store($resource . '-checksum', $checksum);
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}
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/**
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* Return the cached messages
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*
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* @param $ressource
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*
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* @return array
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*/
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private function cachedMessages($ressource)
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{
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if ($this->cacheChecksum($ressource) == ($currentChecksum = $this->checksum($ressource))) {
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return apcu_fetch($ressource . '-messages');
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}
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$messages = $this->underlyingFileLoader->loadResource($ressource);
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apcu_store($ressource . '-messages', $messages);
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$this->setCacheChecksum($ressource, $currentChecksum);
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return $messages;
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}
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}
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