PHPLIB-149: implement find on files collection

src/GridFS/Bucket.php

@@ -128,12 +128,6 @@ class Bucket
       }
     }
 
-    public function find($filter, array $options =[])
-    {
-        //add proper validation for the filter and for the options
-            return $this->filesCollection->find($filter);
-    }
-
     private function ensureIndexes()
     {
         if ($this->ensuredIndexes) {

src/GridFS/BucketReadWriter.php

@@ -112,5 +112,14 @@ class BucketReadWriter
         $gridFsStream = new GridFsDownload($this->bucket, null, $file);
         $gridFsStream->downloadToStream($destination);
     }
-
+    /**
+    * Find files from the GridFS bucket files collection.
+    *
+    * @param array    $filter     filter to find by
+    * @param array    $options    options to
+    */
+    public function find($filter, array $options =[])
+    {
+        return $this->bucket->getFilesCollection()->find($filter, $options);
+    }
 }