Basic caching for dir result

src/cachingshare.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace SMB;
+
+/**
+ * Class CachingShare
+ *
+ * caches metadata from share
+ *
+ * @package SMB
+ */
+class CachingShare extends Share {
+	private $dirCache = array();
+
+	private function clear($path = null) {
+		if (is_null($path)) {
+			$this->dirCache = array();
+		} else {
+			unset($this->dirCache[$path]);
+		}
+	}
+
+	public function dir($path) {
+		if (!isset($this->dirCache[$path])) {
+			$this->dirCache[$path] = parent::dir($path);
+		}
+		return $this->dirCache[$path];
+	}
+
+	public function mkdir($path) {
+		$this->clear(dirname($path));
+		return parent::mkdir($path);
+	}
+
+	public function rmdir($path) {
+		$this->clear(dirname($path));
+		return parent::rmdir($path);
+	}
+
+	public function del($path) {
+		$this->clear(dirname($path));
+		return parent::del($path);
+	}
+
+	public function put($source, $target) {
+		$this->clear(dirname($target));
+		return parent::put($source, $target);
+	}
+
+	public function rename($from, $to) {
+		$this->clear(dirname($from));
+		$this->clear(dirname($to));
+		return parent::rename($from, $to);
+	}
+}