put format-specific db writers/readers together

1 files changed, 37 insertions, 0 deletions

diff --git a/vk/utils/tracking/db/backend/null.py b/vk/utils/tracking/db/backend/null.py
new file mode 100644
index 0000000..139a9f0
--- /dev/null
+++ b/vk/utils/tracking/db/backend/null.py
@@ -0,0 +1,37 @@
+# Copyright 2016 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is licensed under the terms of the MIT License.
+# See LICENSE.txt for details.
+
+from collections.abc import Iterable
+
+class Writer:
+    def __init__(self, fd):
+        pass
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        pass
+
+    def on_initial_status(self, user):
+        pass
+
+    def on_status_update(self, user):
+        pass
+
+    def on_connection_error(self, e):
+        pass
+
+class Reader(Iterable):
+    def __init__(self, fd):
+        pass
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        pass
+
+    def __iter__(self):
+        pass