From 6f38f7b014f783b1edfdb3861b49b89604d80523 Mon Sep 17 00:00:00 2001
From: Bussonnier Matthias <bussonniermatthias@gmail.com>
Date: Fri, 12 Dec 2014 15:24:53 +0100
Subject: [PATCH] generalise manager

---
 IPython/html/services/config/manager.py | 86 ++-----------------------
 1 file changed, 5 insertions(+), 81 deletions(-)

diff --git a/IPython/html/services/config/manager.py b/IPython/html/services/config/manager.py
index 429da07ee..3b9b37cc8 100644
--- a/IPython/html/services/config/manager.py
+++ b/IPython/html/services/config/manager.py
@@ -2,89 +2,13 @@
 """
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
-import errno
-import io
-import json
+
 import os
 
-from IPython.config import LoggingConfigurable
-from IPython.utils.path import locate_profile
-from IPython.utils.py3compat import PY3
-from IPython.utils.traitlets import Unicode
+from IPython.config.manager import BaseConfigManager
 
+class ConfigManager(BaseConfigManager):
+    """Config Manager use for storin Javascript side config"""
 
-def recursive_update(target, new):
-    """Recursively update one dictionary using another.
-
-    None values will delete their keys.
-    """
-    for k, v in new.items():
-        if isinstance(v, dict):
-            if k not in target:
-                target[k] = {}
-            recursive_update(target[k], v)
-            if not target[k]:
-                # Prune empty subdicts
-                del target[k]
-
-        elif v is None:
-            target.pop(k, None)
-
-        else:
-            target[k] = v
-
-
-class ConfigManager(LoggingConfigurable):
-    profile_dir = Unicode()
-    def _profile_dir_default(self):
-        return locate_profile()
-
-    @property
-    def config_dir(self):
+    def _config_dir(self):
         return os.path.join(self.profile_dir, 'nbconfig')
-
-    def ensure_config_dir_exists(self):
-        try:
-            os.mkdir(self.config_dir, 0o755)
-        except OSError as e:
-            if e.errno != errno.EEXIST:
-                raise
-
-    def file_name(self, section_name):
-        return os.path.join(self.config_dir, section_name+'.json')
-
-    def get(self, section_name):
-        """Retrieve the config data for the specified section.
-
-        Returns the data as a dictionary, or an empty dictionary if the file
-        doesn't exist.
-        """
-        filename = self.file_name(section_name)
-        if os.path.isfile(filename):
-            with io.open(filename, encoding='utf-8') as f:
-                return json.load(f)
-        else:
-            return {}
-
-    def set(self, section_name, data):
-        """Store the given config data.
-        """
-        filename = self.file_name(section_name)
-        self.ensure_config_dir_exists()
-
-        if PY3:
-            f = io.open(filename, 'w', encoding='utf-8')
-        else:
-            f = open(filename, 'wb')
-        with f:
-            json.dump(data, f)
-
-    def update(self, section_name, new_data):
-        """Modify the config section by recursively updating it with new_data.
-
-        Returns the modified config data as a dictionary.
-        """
-        data = self.get(section_name)
-        recursive_update(data, new_data)
-        self.set(section_name, data)
-        return data