1 files changed, 24 insertions, 3 deletions
diff --git a/lib/files/storage/loader.php b/lib/files/storage/loader.php
index 7330cae4cc4..2572ef443bc 100644
--- a/lib/files/storage/loader.php
+++ b/lib/files/storage/loader.php
@@ -9,9 +9,30 @@
 namespace OC\Files\Storage;
 
 class Loader {
-	private function $wrappers
+	/**
+	 * @var callable[] $storageWrappers
+	 */
+	private $storageWrappers = array();
 
-	public function load($class, $arguments) {
-		return new $class($arguments);
+	/**
+	 * allow modifier storage behaviour by adding wrappers around storages
+	 *
+	 * $callback should be a function of type (string $mountPoint, Storage $storage) => Storage
+	 *
+	 * @param callable $callback
+	 */
+	public function addStorageWrapper($callback) {
+		$this->storageWrappers[] = $callback;
+	}
+
+	public function load($mountPoint, $class, $arguments) {
+		return $this->wrap($mountPoint, new $class($arguments));
+	}
+
+	public function wrap($mountPoint, $storage) {
+		foreach ($this->storageWrappers as $wrapper) {
+			$storage = $wrapper($mountPoint, $storage);
+		}
+		return $storage;
 	}
 }