Correzioni minori e aggiornamento a Laravel 9

app/LaravelGettext/FileLoader/Cache/ApcuFileCacheLoader.php

@@ -0,0 +1,106 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: aaflalo
+ * Date: 18-03-01
+ * Time: 10:23
+ */
+
+namespace App\LaravelGettext\FileLoader\Cache;
+
+use Symfony\Component\Translation\Exception\InvalidResourceException;
+use Symfony\Component\Translation\Loader\FileLoader;
+
+class ApcuFileCacheLoader extends FileLoader
+{
+
+    /**
+     * @var FileLoader
+     */
+    private $underlyingFileLoader;
+
+    /**
+     * ApcuFileCacheLoader constructor.
+     *
+     * @param FileLoader $underlyingFileLoader
+     */
+    public function __construct(FileLoader $underlyingFileLoader)
+    {
+        $this->underlyingFileLoader = $underlyingFileLoader;
+    }
+
+
+    /**
+     * @param string $resource
+     *
+     * @return array
+     *
+     * @throws InvalidResourceException if stream content has an invalid format
+     */
+    protected function loadResource(string $resource): array
+    {
+        if (!extension_loaded('apcu')) {
+            return $this->underlyingFileLoader->loadResource($resource);
+        }
+
+        return $this->cachedMessages($resource);
+    }
+
+    /**
+     * Calculate the checksum for the file
+     *
+     * @param $resource
+     *
+     * @return string
+     */
+    private function checksum($resource)
+    {
+        return filemtime($resource) . '-' . filesize($resource);
+    }
+
+    /**
+     * Checksum saved in cache
+     *
+     * @param $resource
+     *
+     * @return string
+     */
+    private function cacheChecksum($resource)
+    {
+        return apcu_fetch($resource . '-checksum');
+    }
+
+    /**
+     * Set the cache checksum
+     *
+     * @param $resource
+     * @param $checksum
+     *
+     * @return array|bool
+     */
+    private function setCacheChecksum($resource, $checksum)
+    {
+        return apcu_store($resource . '-checksum', $checksum);
+    }
+
+    /**
+     * Return the cached messages
+     *
+     * @param $ressource
+     *
+     * @return array
+     */
+    private function cachedMessages($ressource)
+    {
+        if ($this->cacheChecksum($ressource) == ($currentChecksum = $this->checksum($ressource))) {
+            return apcu_fetch($ressource . '-messages');
+        }
+
+        $messages = $this->underlyingFileLoader->loadResource($ressource);
+
+        apcu_store($ressource . '-messages', $messages);
+        $this->setCacheChecksum($ressource, $currentChecksum);
+
+        return $messages;
+    }
+}