Add Flysystem 2 Storage

README.md

@@ -113,6 +113,8 @@ $stack->push(
 ```
 
 ## Flysystem
+
+
 ```php
 [...]
 use League\Flysystem\Adapter\Local;
@@ -133,6 +135,28 @@ $stack->push(
 );
 ```
 
+for Flysystem 2
+
+```php
+[...]
+use League\Flysystem\Local\LocalFilesystemAdapter;
+use Kevinrob\GuzzleCache\Strategy\PrivateCacheStrategy;
+use Kevinrob\GuzzleCache\Storage\Flysystem2Storage;
+
+[...]
+
+$stack->push(
+  new CacheMiddleware(
+    new PrivateCacheStrategy(
+      new Flysystem2Storage(
+        new LocalFilesystemAdapter('/path/to/cache')
+      )
+    )
+  ),
+  'cache'
+);
+```
+
 ## WordPress Object Cache
 ```php
 [...]

src/Storage/Flysystem2Storage.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Kevinrob\GuzzleCache\Storage;
+
+use Kevinrob\GuzzleCache\CacheEntry;
+use League\Flysystem\Local\LocalFilesystemAdapter;
+use League\Flysystem\Filesystem;
+use League\Flysystem\FileNotFoundException;
+
+class Flysystem2Storage implements CacheStorageInterface
+{
+
+    /**
+     * @var Filesystem
+     */
+    protected $filesystem;
+
+    public function __construct(LocalFilesystemAdapter $adapter)
+    {
+        $this->filesystem = new Filesystem($adapter);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function fetch($key)
+    {
+        if ($this->filesystem->fileExists($key)) {
+            // The file exist, read it!
+            $data = @unserialize(
+                $this->filesystem->read($key)
+            );
+
+            if ($data instanceof CacheEntry) {
+                return $data;
+            }
+        }
+
+        return;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function save($key, CacheEntry $data)
+    {
+        return $this->filesystem->write($key, serialize($data));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function delete($key)
+    {
+        try {
+            return $this->filesystem->delete($key);
+        } catch (FileNotFoundException $ex) {
+            return true;
+        }
+    }
+}