From bf6655a534a6775d30cafa67bd801276bda1d98d Mon Sep 17 00:00:00 2001
From: polo <ordipolo@gmx.fr>
Date: Tue, 13 Aug 2024 23:45:21 +0200
Subject: =?UTF-8?q?VERSION=200.2=20doctrine=20ORM=20et=20entit=C3=A9s?=
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---
 .../orm/src/Cache/Region/FileLockRegion.php        | 194 +++++++++++++++++++++
 1 file changed, 194 insertions(+)
 create mode 100644 vendor/doctrine/orm/src/Cache/Region/FileLockRegion.php

(limited to 'vendor/doctrine/orm/src/Cache/Region/FileLockRegion.php')

diff --git a/vendor/doctrine/orm/src/Cache/Region/FileLockRegion.php b/vendor/doctrine/orm/src/Cache/Region/FileLockRegion.php
new file mode 100644
index 0000000..bedd6a6
--- /dev/null
+++ b/vendor/doctrine/orm/src/Cache/Region/FileLockRegion.php
@@ -0,0 +1,194 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Cache\Region;
+
+use Doctrine\ORM\Cache\CacheEntry;
+use Doctrine\ORM\Cache\CacheKey;
+use Doctrine\ORM\Cache\CollectionCacheEntry;
+use Doctrine\ORM\Cache\ConcurrentRegion;
+use Doctrine\ORM\Cache\Lock;
+use Doctrine\ORM\Cache\Region;
+use InvalidArgumentException;
+
+use function array_filter;
+use function array_map;
+use function chmod;
+use function file_get_contents;
+use function file_put_contents;
+use function fileatime;
+use function glob;
+use function is_dir;
+use function is_file;
+use function is_writable;
+use function mkdir;
+use function sprintf;
+use function time;
+use function unlink;
+
+use const DIRECTORY_SEPARATOR;
+use const LOCK_EX;
+
+/**
+ * Very naive concurrent region, based on file locks.
+ */
+class FileLockRegion implements ConcurrentRegion
+{
+    final public const LOCK_EXTENSION = 'lock';
+
+    /**
+     * @param numeric-string|int $lockLifetime
+     *
+     * @throws InvalidArgumentException
+     */
+    public function __construct(
+        private readonly Region $region,
+        private readonly string $directory,
+        private readonly string|int $lockLifetime,
+    ) {
+        if (! is_dir($directory) && ! @mkdir($directory, 0775, true)) {
+            throw new InvalidArgumentException(sprintf('The directory "%s" does not exist and could not be created.', $directory));
+        }
+
+        if (! is_writable($directory)) {
+            throw new InvalidArgumentException(sprintf('The directory "%s" is not writable.', $directory));
+        }
+    }
+
+    private function isLocked(CacheKey $key, Lock|null $lock = null): bool
+    {
+        $filename = $this->getLockFileName($key);
+
+        if (! is_file($filename)) {
+            return false;
+        }
+
+        $time    = $this->getLockTime($filename);
+        $content = $this->getLockContent($filename);
+
+        if ($content === false || $time === false) {
+            @unlink($filename);
+
+            return false;
+        }
+
+        if ($lock && $content === $lock->value) {
+            return false;
+        }
+
+        // outdated lock
+        if ($time + $this->lockLifetime <= time()) {
+            @unlink($filename);
+
+            return false;
+        }
+
+        return true;
+    }
+
+    private function getLockFileName(CacheKey $key): string
+    {
+        return $this->directory . DIRECTORY_SEPARATOR . $key->hash . '.' . self::LOCK_EXTENSION;
+    }
+
+    private function getLockContent(string $filename): string|false
+    {
+        return @file_get_contents($filename);
+    }
+
+    private function getLockTime(string $filename): int|false
+    {
+        return @fileatime($filename);
+    }
+
+    public function getName(): string
+    {
+        return $this->region->getName();
+    }
+
+    public function contains(CacheKey $key): bool
+    {
+        if ($this->isLocked($key)) {
+            return false;
+        }
+
+        return $this->region->contains($key);
+    }
+
+    public function get(CacheKey $key): CacheEntry|null
+    {
+        if ($this->isLocked($key)) {
+            return null;
+        }
+
+        return $this->region->get($key);
+    }
+
+    public function getMultiple(CollectionCacheEntry $collection): array|null
+    {
+        if (array_filter(array_map($this->isLocked(...), $collection->identifiers))) {
+            return null;
+        }
+
+        return $this->region->getMultiple($collection);
+    }
+
+    public function put(CacheKey $key, CacheEntry $entry, Lock|null $lock = null): bool
+    {
+        if ($this->isLocked($key, $lock)) {
+            return false;
+        }
+
+        return $this->region->put($key, $entry);
+    }
+
+    public function evict(CacheKey $key): bool
+    {
+        if ($this->isLocked($key)) {
+            @unlink($this->getLockFileName($key));
+        }
+
+        return $this->region->evict($key);
+    }
+
+    public function evictAll(): bool
+    {
+        // The check below is necessary because on some platforms glob returns false
+        // when nothing matched (even though no errors occurred)
+        $filenames = glob(sprintf('%s/*.%s', $this->directory, self::LOCK_EXTENSION)) ?: [];
+
+        foreach ($filenames as $filename) {
+            @unlink($filename);
+        }
+
+        return $this->region->evictAll();
+    }
+
+    public function lock(CacheKey $key): Lock|null
+    {
+        if ($this->isLocked($key)) {
+            return null;
+        }
+
+        $lock     = Lock::createLockRead();
+        $filename = $this->getLockFileName($key);
+
+        if (@file_put_contents($filename, $lock->value, LOCK_EX) === false) {
+            return null;
+        }
+
+        chmod($filename, 0664);
+
+        return $lock;
+    }
+
+    public function unlock(CacheKey $key, Lock $lock): bool
+    {
+        if ($this->isLocked($key, $lock)) {
+            return false;
+        }
+
+        return @unlink($this->getLockFileName($key));
+    }
+}
-- 
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