Encode dot in MongoDB saver as underscore

src/Xhgui/Saver/MongoSaver.php

@@ -40,11 +40,34 @@ public function save(array $data): string
         $a = [
             '_id' => $id,
             'meta' => $meta,
-            'profile' => $data['profile'],
+            'profile' => $this->encodeProfile($data['profile']),
         ];
 
         $this->_collection->insert($a, ['w' => 0]);
 
         return (string)$id;
     }
+
+    /**
+     * MongoDB can't save keys with values containing a dot:
+     *
+     *   InvalidArgumentException: invalid document for insert: keys cannot contain ".":
+     *   "Zend_Controller_Dispatcher_Standard::loadClass==>load::controllers/ArticleController.php"
+     *
+     * Replace the dots with underscrore in keys.
+     *
+     * @link https://github.com/perftools/xhgui/issues/209
+     */
+    private function encodeProfile(array $profile): array
+    {
+        $results = [];
+        foreach ($profile as $k => $v) {
+            if (strpos($k, '.') !== false) {
+                $k = str_replace('.', '_', $k);
+            }
+            $results[$k] = $v;
+        }
+
+        return $results;
+    }
 }