Create SimpleFileCacheAdapter

src/CacheAdapters/SimpleFileCacheAdapter.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace Miguilim\AntiBotLinks\CacheAdapters;
+
+class SimpleFileCacheAdapter extends AbstractCacheAdapter
+{
+    public function __construct(protected string $cacheDir)
+    {
+        if (! str_ends_with($this->cacheDir, '/')) {
+            $this->cacheDir .= '/';
+        }
+
+        if (! is_dir($this->cacheDir)) {
+            mkdir($this->cacheDir, 0755, true);
+        }
+    }
+
+    public function remember(string $key, int $expiresIn, callable $callback): mixed
+    {
+        $cacheFilePath = $this->getCacheFilePath($key);
+
+        if ($this->isCacheValid($cacheFilePath)) {
+            return $this->readCache($cacheFilePath)['content'];
+        }
+
+        $value = $callback();
+        $this->writeCache($cacheFilePath, $value, $expiresIn);
+
+        return $value;
+    }
+
+    public function get(string $key): mixed
+    {
+        $cacheFilePath = $this->getCacheFilePath($key);
+
+        if ($this->isCacheValid($cacheFilePath)) {
+            return $this->readCache($cacheFilePath)['content'];
+        }
+
+        return null;
+    }
+
+    public function forget(string $key): bool
+    {
+        $cacheFilePath = $this->getCacheFilePath($key);
+
+        if (file_exists($cacheFilePath)) {
+            return unlink($cacheFilePath);
+        }
+
+        return false;
+    }
+
+    protected function getCacheFilePath(string $key): string 
+    {
+        return $this->cacheDir . '/' . md5($key) . '.cache';
+    }
+
+    protected function isCacheValid(string $cacheFilePath): bool 
+    {
+        if (file_exists($cacheFilePath)) {
+            $expiresAt = (int) $this->readCache($cacheFilePath)['expires_at'];
+
+            return $expiresAt > time();
+        }
+
+        return false;
+    }
+
+    protected function readCache(string $cacheFilePath): mixed 
+    {
+        return unserialize(file_get_contents($cacheFilePath));
+    }
+
+    protected function writeCache(string $cacheFilePath, mixed $value, int $expiresIn): void 
+    {
+        $expiresAt = time() + $expiresIn;
+
+        file_put_contents($cacheFilePath, serialize(['expires_at' => $expiresAt, 'content' => $value]));
+    }
+}